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* [Bug c++/87080] [9 Regression] ice in cp_get_fndecl_from_callee, at cp/cvt.c:965
[not found] <bug-87080-4@http.gcc.gnu.org/bugzilla/>
@ 2018-08-26 16:32 ` mpolacek at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: mpolacek at gcc dot gnu.org @ 2018-08-26 16:32 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87080
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Sun Aug 26 16:31:27 2018
New Revision: 263862
URL: https://gcc.gnu.org/viewcvs?rev=263862&root=gcc&view=rev
Log:
PR c++/87080
* typeck.c (maybe_warn_pessimizing_move): Do nothing in a template.
* g++.dg/cpp0x/Wpessimizing-move5.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/Wpessimizing-move5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87080] [9 Regression] ice in cp_get_fndecl_from_callee, at cp/cvt.c:965
Date: Sun, 26 Aug 2018 16:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87080
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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From: "ghabriel.nunes at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87108] New: Template partial specialization is ignored
Date: Sun, 26 Aug 2018 16:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87108
Bug ID: 87108
Summary: Template partial specialization is ignored
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ghabriel.nunes at hotmail dot com
Target Milestone: ---
Created attachment 44599
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44599&action=edit
Code to reproduce the problem
Compiling the attached code with g++ bug.cpp (no other flags required) results
in two errors:
bug.cpp: In function ‘ExampleScaling foo()’:
bug.cpp:26:17: error: could not convert ‘{42}’ from ‘<brace-enclosed
initializer list>’ to ‘ExampleScaling’ {aka ‘HowAboutNo’}
return { 42 };
^
bug.cpp: In function ‘int main(int, char**)’:
bug.cpp:30:24: error: ‘using ExampleScaling = scale_t<1000, amount<1> >’ {aka
‘struct HowAboutNo’} has no member named ‘value’
std::cout << foo().value << std::endl;
^~~~~
I've tested all versions from 6.1 to 8.2 (in godbolt) and 8.1.1 (locally) and
all of them yield the same result. The code compiles fine in Clang and MSVC.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87029] Add -Wredundant-move warning
Date: Sun, 26 Aug 2018 16:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87029
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Sun Aug 26 16:45:51 2018
New Revision: 263863
URL: https://gcc.gnu.org/viewcvs?rev=263863&root=gcc&view=rev
Log:
PR c++/87029, Implement -Wredundant-move.
* c.opt (Wredundant-move): New option.
* typeck.c (treat_lvalue_as_rvalue_p): New function.
(maybe_warn_pessimizing_move): Call convert_from_reference.
Warn about redundant moves.
* doc/invoke.texi: Document -Wredundant-move.
* g++.dg/cpp0x/Wredundant-move1.C: New test.
* g++.dg/cpp0x/Wredundant-move2.C: New test.
* g++.dg/cpp0x/Wredundant-move3.C: New test.
* g++.dg/cpp0x/Wredundant-move4.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/Wredundant-move1.C
trunk/gcc/testsuite/g++.dg/cpp0x/Wredundant-move2.C
trunk/gcc/testsuite/g++.dg/cpp0x/Wredundant-move3.C
trunk/gcc/testsuite/g++.dg/cpp0x/Wredundant-move4.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c.opt
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87029] Add -Wredundant-move warning
Date: Sun, 26 Aug 2018 16:49:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Implemented for GCC 9. This warning should still be extended to handle
initializers, where the std::move can also be redundant.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87109] New: Wrong overload picked with ref-qualifiers
Date: Sun, 26 Aug 2018 17:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87109
Bug ID: 87109
Summary: Wrong overload picked with ref-qualifiers
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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As discussed in <https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01607.html>, g++
chooses the wrong overload for f1:
#include <utility>
struct C { };
struct A {
operator C() &;
operator C() &&;
};
C f1(A a)
{
return a; // should call operator C()&, but calls operator C()&&
}
C f2(A a)
{
return std::move(a); // calls operator C()&&
}
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86760] [8/9 Regression] FORTRAN: polymorphic arrays inside a user-defined type generate segmentation faults
Date: Sun, 26 Aug 2018 17:18:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |janus at gcc dot gnu.org
--- Comment #3 from janus at gcc dot gnu.org ---
Further reduced test case:
MODULE test_nesting_mod
IMPLICIT NONE
TYPE :: test_obj1
CONTAINS
PROCEDURE :: destroy
END TYPE
TYPE :: obj_ptr
CLASS(test_obj1), POINTER :: f => NULL()
END TYPE
TYPE :: obj_container
TYPE(obj_ptr), POINTER, DIMENSION(:) :: v => NULL()
END TYPE
CONTAINS
SUBROUTINE destroy(self)
CLASS(test_obj1), INTENT(INOUT) :: self
WRITE(*,*)'Obj1'
END SUBROUTINE
SUBROUTINE container_destroy(self)
type(obj_container), INTENT(INOUT) :: self
INTEGER :: i
DO i=1,ubound(self%v,1)
CALL self%v(i)%f%destroy()
END DO
END SUBROUTINE
END MODULE
PROGRAM test_nesting_ptr
USE test_nesting_mod
IMPLICIT NONE
INTEGER :: i
INTEGER, PARAMETER :: n = 2
TYPE(obj_container) :: var
ALLOCATE(var%v(n))
DO i=1,n
ALLOCATE(test_obj1::var%v(i)%f)
END DO
CALL container_destroy(var)
END
This one does not always segfault, but when compiled with trunk and -O3,
valgrind reliably shows the error:
==24015== Invalid read of size 8
==24015== at 0x400989: __test_nesting_mod_MOD_container_destroy
(test.f90:27)
==24015== by 0x40075C: test_nesting_ptr (test.f90:45)
==24015== by 0x40075C: main (test.f90:35)
When compiled with gfortran 8 and -O3, valgrind only shows:
==24605== Use of uninitialised value of size 8
==24605== at 0x108B65: __test_nesting_mod_MOD_container_destroy
(test.f90:27)
==24605== by 0x108912: test_nesting_ptr (test.f90:45)
==24605== by 0x108912: main (test.f90:35)
When compiled with gfortran 7, valgrind shows no errors. Both errors above
reference the line where 'destroy' is called.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87109] Wrong overload picked with ref-qualifiers
Date: Sun, 26 Aug 2018 17:22:00 -0000
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I guess this can serve as a run-time testcase:
#include <utility>
struct C { int i; };
struct A {
operator C() & { return { 1 }; }
operator C() && { return { 2 }; }
};
C f(A a)
{
return a;
}
C f2(A a)
{
return std::move (a);
}
int
main ()
{
C c1 = f (A());
if (c1.i != 1)
__builtin_abort ();
C c2 = f2 (A());
if (c2.i != 2)
__builtin_abort ();
}
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Sun, 26 Aug 2018 17:23:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86760
--- Comment #11 from janus at gcc dot gnu.org ---
I think PR 86760 may be a duplicate of this one, or at least related.
>From gcc-bugs-return-613789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 17:55:33 2018
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Subject: [Bug c/87110] New: tree check fail in to_wide, at tree.h:5523
Date: Sun, 26 Aug 2018 17:55:00 -0000
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Bug ID: 87110
Summary: tree check fail in to_wide, at tree.h:5523
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Somewhere between revisions 263799 and 263849, this C code
enum a { b, c };
struct d {
_Bool e;
enum a f
};
g, h;
i() {
struct d j[h];
j[0] = (struct d){.f = c};
for (; g;)
(struct d){};
}
goes wrong:
/home/dcb/gcc/results.263799.asan/bin/gcc
/home/dcb/gcc/results.263849/bin/gcc
during GIMPLE pass: dse
bug460.c: In function ‘i’:
bug460.c:12:1: internal compiler error: tree check: expected integer_cst, have
v
ar_decl in to_wide, at tree.h:5523
12 | }
| ^
0x6b17b1 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../trunk/gcc/tree.c:9370
0x6b3f9d tree_check(tree_node const*, char const*, int, char const*, tree_code)
../../trunk/gcc/tree.h:3376
0x6b3f9d wi::to_wide(tree_node const*)
../../trunk/gcc/tree.h:5523
0x6b3f9d tree_int_cst_sgn(tree_node const*)
../../trunk/gcc/tree.c:6872
with compiler flag -O2.
>From gcc-bugs-return-613790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 18:31:32 2018
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Subject: [Bug fortran/29550] Optimize -fexternal-blas calls for conjg()
Date: Sun, 26 Aug 2018 18:31:00 -0000
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--- Comment #12 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 44600
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44600&action=edit
Patch which has a problem
The attached patch shows how something could be done, but it
has one problem: The handling of -fblas-matmul-limit .
If we change the arguments to the matmul call, it would be
_necessary_ to always call the external function, otherwise
there would be wrong code.
>From gcc-bugs-return-613791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 18:35:44 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
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--- Comment #5 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to Jonathan Wakely from comment #2)
> (In reply to miltonkbenjamin from comment #0)
> > Created attachment 44589 [details]
> > Output from win_flex
> >
> > C:\parser>g++ -Xpreprocessor "C:\MinGW\msys\1.0\include\FlexLexer.h"
> > lex.yy.cc
>
> -Xpreprocessor passes an option to the preprocessor, but you're giving it a
> filename.
>
> Are you trying to have that file included?
>
> That would be -include "C:\MinGW\msys\1.0\include\FlexLexer.h"
>
> Also, GCC 5.4.0 is not supported, the oldest supported release is 6.4.0
I am currently using version g++ 7.3.0 and it fails the same way.
Thanks, Milt
>From gcc-bugs-return-613792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 19:00:46 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
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--- Comment #6 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to miltonkbenjamin from comment #5)
> (In reply to Jonathan Wakely from comment #2)
> > (In reply to miltonkbenjamin from comment #0)
> > > Created attachment 44589 [details]
> > > Output from win_flex
> > >
> > > C:\parser>g++ -Xpreprocessor "C:\MinGW\msys\1.0\include\FlexLexer.h"
> > > lex.yy.cc
> >
> > -Xpreprocessor passes an option to the preprocessor, but you're giving it a
I TRIED THIS AND IT FAILED THE SAME WAY AS BEFORE
Thanks, Mil
********************************************
> > filename.
> >
> > Are you trying to have that file included?
> >
> > That would be -include "C:\MinGW\msys\1.0\include\FlexLexer.h"
> >
> > Also, GCC 5.4.0 is not supported, the oldest supported release is 6.4.0
>
> I am currently using version g++ 7.3.0 and it fails the same way.
> Thanks, Milt
>From gcc-bugs-return-613793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 19:16:04 2018
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Subject: [Bug c/86647] Test on constant expression (unsigned) -1 < 0 triggers a spurious -Wtype-limits warning
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bernd.edlinger at hotmail dot de
--- Comment #2 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
possible workaround:
#define SIGNED(T) ((T) -1 < 1)
>From gcc-bugs-return-613794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 21:25:35 2018
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From: "jozef.l at mittosystems dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86662] [7/8/9 Regression] msp430-elf segfault with -flto and -mlarge
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Jozef Lawrynowicz <jozef.l at mittosystems dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Fixed on all branches, marking resolved.
>From gcc-bugs-return-613795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 21:34:59 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
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--- Comment #7 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to miltonkbenjamin from comment #5)
> (In reply to Jonathan Wakely from comment #2)
> > (In reply to miltonkbenjamin from comment #0)
> > > Created attachment 44589 [details]
> > > Output from win_flex
> > >
> > > C:\parser>g++ -Xpreprocessor "C:\MinGW\msys\1.0\include\FlexLexer.h"
> > > lex.yy.cc
> >
> > -Xpreprocessor passes an option to the preprocessor, but you're giving it a
> > filename.
> >
> > Are you trying to have that file included?
=============================================
I did this and it failed the same way
Thanks,
Milt
> >
> > That would be -include "C:\MinGW\msys\1.0\include\FlexLexer.h"
> >
=============================================
> > Also, GCC 5.4.0 is not supported, the oldest supported release is 6.4.0
>
> I am currently using version g++ 7.3.0 and it fails the same way.
> Thanks, Milt
>From gcc-bugs-return-613796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 21:37:14 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
Date: Sun, 26 Aug 2018 21:37:00 -0000
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miltonkbenjamin <miltonkbenjamin at verizon dot net> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |---
--- Comment #8 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
C:\parser>g++ -Xpreprocessor "C:\MinGW\msys\1.0\include\FlexLexer.h" lex.yy.cc
lex.yy.cc:1:0: fatal error: inter-module optimizations not implemented for C++
#line 2 "lex.yy.cc"
compilation terminated. ================================
>From gcc-bugs-return-613797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 23:02:42 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
Date: Sun, 26 Aug 2018 23:02:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You're still doing it wrong.
As I already said, to include a file you should be using -include not
-Xpreprocessor.
Stop using the -Xpreprocessor option to name a file for inclusion, that's not
what it does.
>From gcc-bugs-return-613798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 26 23:23:29 2018
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From: "jvg1981 at aim dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/63303] Pointer subtraction is broken when using -fsanitize=undefined
Date: Sun, 26 Aug 2018 23:23:00 -0000
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--- Comment #20 from Joshua Green <jvg1981 at aim dot com> ---
> "But if we don't know which pointer is greater, it gets more complicated:
> ..."
>
> I'm not sure that this is true. For types that are larger than 1 byte, it
> seems that one can do the subtraction after any division(s), hence only
> costing an additional division (or shift):
>
> T * p;
> T * q;
>
> .
> .
> .
>
> intptr_t pVal = ((uintptr_t) p)/(sizeof *p);
> intptr_t qVal = ((uintptr_t) q)/(sizeof *q);
>
> ptrdiff_t p_q = pVal - qVal;
>
> This should work in well-defined cases, for if p and q are pointers into the
> same array then (presumably) ((uintptr_t) p) and ((uintptr_t) q) must have
> the same remainder modulo sizeof(T).
>
> Of course, even an additional shift may be too expensive in some cases, so
> it's not entirely clear that this change should be made.
It occurred to me that such contortions can be avoided in the (possibly) common
case when (say) q is actually an array.
>From gcc-bugs-return-613799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 00:16:58 2018
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Subject: [Bug target/52090] FAIL: c-c++-common/simulate-thread/bitfields-4.c -O2 -g thread simulation test
Date: Mon, 27 Aug 2018 00:16:00 -0000
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
I believe this is probably a gdb bug. Calling the verify routine after each
step can corrupt the register state.
I don't see a way to save and restore all general registers in verify routine.
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Subject: [Bug target/87085] with -march=i386, gcc should not generate code including endbr instruction
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--- Comment #3 from chengming at bjuci dot com.cn ---
Created attachment 44601
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C source code
>From gcc-bugs-return-613802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 02:09:45 2018
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--- Comment #5 from chengming at bjuci dot com.cn ---
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output of gcc
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--- Comment #4 from chengming at bjuci dot com.cn ---
Created attachment 44602
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ELF file
compiled with command
gcc -v -save-temps -m32 -march=i386 -fcf-protection=none -o onlyReturn
onlyReturn.c > output.txt 2>&1
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Subject: [Bug target/87085] with -march=i386, gcc should not generate code including endbr instruction
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--- Comment #6 from chengming at bjuci dot com.cn ---
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Subject: [Bug c++/44520] improve diagnostic for ambiguous lookup
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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Subject: [Bug c/80528] reimplement gnulib's "useless-if-before-free" script as a compiler warning
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |list+gcc-bugzilla@meyering.
| |net
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing Jim Meyering, the author of the original gnulib script, to see if he has
any input
>From gcc-bugs-return-613806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 05:14:59 2018
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From: "bugdal at aerifal dot cx" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87111] New: erroneous builtin snprintf transformations
Date: Mon, 27 Aug 2018 05:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87111
Bug ID: 87111
Summary: erroneous builtin snprintf transformations
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: bugdal at aerifal dot cx
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Even at -O0, gcc transforms the call snprintf(buf, (size_t)INT_MAX+1, "") to
the value 0, with a side effect storing a zero byte at *buf, despite the
(disputed) POSIX requirement that snprintf fail when the n exceeds INT_MAX.
This transformation is reported to cause failure of the official POSIX
conformance tests, even when the library implementation for snprintf is
conforming to the requirement.
>From gcc-bugs-return-613808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 05:24:41 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |bugdal at aerifal dot cx
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87111 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-613807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 05:24:24 2018
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Subject: [Bug c/87111] erroneous builtin snprintf transformations
Date: Mon, 27 Aug 2018 05:24:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 87096 ***
>From gcc-bugs-return-613809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 06:20:47 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/78529] gcc.c-torture/execute/builtins/strcat-chk.c failed with lto/O2
Date: Mon, 27 Aug 2018 06:20:00 -0000
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--- Comment #37 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 24 Aug 2018, joey.ye at arm dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78529
>
> Joey Ye <joey.ye at arm dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |joey.ye at arm dot com
>
> --- Comment #36 from Joey Ye <joey.ye at arm dot com> ---
> Simply applying __attribute__((noipa)) to memset (and all other C lib
> implementations) in chk.c prevents IPA analysis in the local implementation of
> memset, thus avoids the issue when it is later replaced by a library copy.
>
> The workaround does pass this case in my experiment, which can be turn into a
> patch after additional work and testing. Is it an acceptable workaround to
> upstream?
I guess so. As said in comment#33 building the -lib.c part w/o -flto
(and optimization) and build it only once would be preferable.
>From gcc-bugs-return-613810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 06:52:25 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/87094] Suboptimal accounting for stack growth in inlining
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The heuristic isn't flow-sensitive.
>From gcc-bugs-return-613811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 06:56:10 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Mon, 27 Aug 2018 06:56:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I don't think we "preserve" exceptional behavior consistently. That is, we
happily change code with exceptional behavior to code without if the main
computation result is the same.
>From gcc-bugs-return-613812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 07:01:12 2018
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Subject: [Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
Date: Mon, 27 Aug 2018 07:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-* i?86-*-*
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |8.1.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-08-27
Component|rtl-optimization |middle-end
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Summary|internal compiler error: |[8/9 Regression] internal
|segmentation fault |compiler error:
| |segmentation fault
Target Milestone|--- |8.3
Known to fail| |8.2.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Backtrace from trunk:
during RTL pass: expand
t.c: In function ‘main’:
t.c:5:13: internal compiler error: Segmentation fault
5 | int a = strncmp(&(myArray[1]),"aaaa",3);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x10491a9 crash_signal
/space/rguenther/src/gcc-sccvn/gcc/toplev.c:325
0x7fe0cd2b2fdf ???
/usr/src/debug/glibc-2.22/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x842f44 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
/space/rguenther/src/gcc-sccvn/gcc/tree.h:3489
0x8766df wi::extended_tree<192>::extended_tree(tree_node const*)
/space/rguenther/src/gcc-sccvn/gcc/tree.h:5541
0x875525 generic_wide_int<wi::extended_tree<192> >::generic_wide_int<tree_node
const*>(tree_node const* const&)
/space/rguenther/src/gcc-sccvn/gcc/wide-int.h:780
0x8750e5 wi::to_widest(tree_node const*)
/space/rguenther/src/gcc-sccvn/gcc/tree.h:5468
0x875117 tree_int_cst_lt(tree_node const*, tree_node const*)
/space/rguenther/src/gcc-sccvn/gcc/tree.h:5721
0x9ede7a maybe_warn_nonstring_arg(tree_node*, tree_node*)
/space/rguenther/src/gcc-sccvn/gcc/calls.c:1663
0x9f02cb initialize_argument_information
/space/rguenther/src/gcc-sccvn/gcc/calls.c:2197
0x9f4fd7 expand_call(tree_node*, rtx_def*, int)
/space/rguenther/src/gcc-sccvn/gcc/calls.c:3583
>From gcc-bugs-return-613814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 07:08:32 2018
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Subject: [Bug ada/87100] FAIL: gnat.dg/config_pragma1.adb execution test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87100
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87101 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-613813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 07:08:31 2018
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Subject: [Bug ada/87101] FAIL: gnat.dg/config_pragma1.adb execution test
Date: Mon, 27 Aug 2018 07:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87101
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 87100 ***
>From gcc-bugs-return-613815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 07:16:16 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
Date: Mon, 27 Aug 2018 07:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Ever confirmed|0 |1
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So on GIMPLE the following are not canonicalized:
<bb 2> [local count: 1073741825]:
_1 = i_4(D) & 7;
_8 = (int) i_4(D);
if (_1 == 6)
goto <bb 3>; [20.97%]
else
goto <bb 4>; [79.03%]
vs.
<bb 2> [local count: 1073741825]:
_1 = i_5(D) + 18446744073709551610;
_2 = _1 & 7;
_9 = (int) i_5(D);
if (_2 == 0)
goto <bb 3>; [34.00%]
else
goto <bb 4>; [66.00%]
where I'd call the former better. Thus for some unknown constraint
on @1, @2 and @3
(simplify
(eq (convert? (bit_and (plus @0 INTEGER_CST@3) @2)) @1)
(eq (convert (bit_and @0 @2)) { ... }))
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87104
--- Comment #7 from pipcet at gmail dot com ---
(In reply to Andrew Pinski from comment #5)
> x86 and x86_64 uses the same back-end so yes it does seem target secific.
I think it's not a target issue; we really want to be generating the same code
for these equivalent functions, and the code on AArch64 is still different.
I'm also not sure what we do for ((X ^ A) & B) == C.
I'm attaching a patch that results, at least, in g being compiled to "jmp f",
so the code is now recognized as equivalent. It seems to produce the right code
for Paul's test case, too.
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
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--- Comment #8 from pipcet at gmail dot com ---
Created attachment 44605
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44605&action=edit
patch to illustrate the issue
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Subject: [Bug sanitizer/87095] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-27
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take a look.
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Subject: [Bug c/87110] [9 Regresssion] tree check fail in to_wide, at tree.h:5523
Date: Mon, 27 Aug 2018 07:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
CC| |law at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to work| |8.2.0
Target Milestone|--- |9.0
Summary|tree check fail in to_wide, |[9 Regresssion] tree check
|at tree.h:5523 |fail in to_wide, at
| |tree.h:5523
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r263793.
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Subject: [Bug tree-optimization/87105] Autovectorization [X86, SSE2, AVX2, DoublePrecision]
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
CC| |rguenth at gcc dot gnu.org
Version|unknown |8.2.1
Blocks| |53947
Ever confirmed|0 |1
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Petr from comment #6)
> I think the test-case can even be simplified to something like this:
>
> #include <algorithm>
> #include <cmath>
>
> struct Point {
> double x, y;
>
> void reset(double x, double y) {
> this->x = x;
> this->y = y;
> }
> };
>
> void f1(Point* p, Point* a) {
> p->reset(std::max(std::sqrt(p->x), a->x),
> std::max(std::sqrt(p->y), a->y));
> }
>
> GCC is unable to vectorize it:
>
> [-std=c++17 -O3 -mavx2 -fno-math-errno]
> f1(Point*, Point*):
> vsqrtsd xmm0, xmm0, QWORD PTR [rdi+8]
> vmovsd xmm1, QWORD PTR [rsi+8]
> vsqrtsd xmm2, xmm2, QWORD PTR [rdi]
> vmaxsd xmm1, xmm1, xmm0
> vmovsd xmm0, QWORD PTR [rsi]
> vmaxsd xmm0, xmm0, xmm2
> vunpcklpd xmm0, xmm0, xmm1
> vmovups XMMWORD PTR [rdi], xmm0
> ret
>
> whereas clang can:
>
> [-std=c++17 -O3 -mavx2 -fno-math-errno]
> f1(Point*, Point*):
> vsqrtpd xmm0, xmmword ptr [rdi]
> vmovupd xmm1, xmmword ptr [rsi]
> vmaxpd xmm0, xmm1, xmm0
> vmovupd xmmword ptr [rdi], xmm0
> ret
>
> I think this is a much simpler test-case to start with.
With -Ofast -mavx2 I get
_Z2f1P5PointS0_:
.LFB1123:
.cfi_startproc
vsqrtpd (%rdi), %xmm0
vmaxpd (%rsi), %xmm0, %xmm0
vmovups %xmm0, (%rdi)
ret
as said elsewhere min/max recognition is the issue here and
return a < b ? b : a;
isn't the same as fmax or MAX_EXPR without further constraints.
For the original testcase GCC thinks some vectorization isn't profitable
and even with -Ofast GCC manages to trick itself in a corner where
MIN/MAX_EXPR detection fails to produce straight-line code. C++
abstraction doesn't help here - we inline the min/max functions before
post-inline passes that would have cleaned up them nicely. In particular
phiopt is run a bit late and is confused bu jump threading we perform in VRP.
-fno-tree-vrp -Ofast -mavx2 generates straight-line non-vectorized code
which the vectorizer thinks is not profitable to vectorize.
In the end we are confused by the redundant stores (the vectorizer has
some too simplified code to handle this):
<bb 2> [local count: 1073741825]:
_12 = MEM[(const double &)bez_1(D) + 8];
_13 = MEM[(const double &)bez_1(D) + 40];
iftmp.0_75 = MAX_EXPR <_12, _13>;
_14 = MEM[(const double &)bez_1(D)];
_15 = MEM[(const double &)bez_1(D) + 32];
iftmp.0_74 = MAX_EXPR <_14, _15>;
iftmp.1_73 = MIN_EXPR <_12, _13>;
iftmp.1_72 = MIN_EXPR <_14, _15>;
bBox_4(D)->x0 = iftmp.1_72;
bBox_4(D)->y0 = iftmp.1_73;
bBox_4(D)->x1 = iftmp.0_74;
bBox_4(D)->y1 = iftmp.0_75;
we vectorize up to here with -fno-vect-cost-model
_6 = MEM[(double *)bez_1(D) + 16B];
_7 = MEM[(double *)bez_1(D) + 24B];
_50 = _7 * 2.0e+0;
_51 = _6 * 2.0e+0;
_10 = MEM[(double *)bez_1(D)];
_11 = MEM[(double *)bez_1(D) + 8B];
_8 = MEM[(double *)bez_1(D) + 32B];
_3 = _8 + _10;
_9 = MEM[(double *)bez_1(D) + 40B];
_5 = _9 + _11;
_46 = _5 - _50;
_47 = _3 - _51;
_44 = _11 - _7;
...
the stores to bBox_4 alias the loads from bez_1 which due to C++ abstraction
from the min/max functions are just double * loads from TBAA perspective.
Given there are no visible stores to bez_1 we cannot assume any containing
dynamic type here.
...
iftmp.1_67 = MIN_EXPR <_23, iftmp.1_72>;
bBox_4(D)->x0 = iftmp.1_67;
iftmp.1_66 = MIN_EXPR <_22, iftmp.1_73>;
bBox_4(D)->y0 = iftmp.1_66;
iftmp.0_65 = MAX_EXPR <_23, iftmp.0_74>;
bBox_4(D)->x1 = iftmp.0_65;
iftmp.0_64 = MAX_EXPR <_22, iftmp.0_75>;
bBox_4(D)->y1 = iftmp.0_64;
return;
Lifting the BB vectorization restriction is on my todo list:
bool
vect_analyze_data_ref_accesses (vec_info *vinfo)
{
...
/* Do not place the same access in the interleaving chain twice. */
if (init_b == init_prev)
{
gcc_assert (gimple_uid (DR_STMT (datarefs_copy[i-1]))
< gimple_uid (DR_STMT (drb)));
/* ??? For now we simply "drop" the later reference which is
otherwise the same rather than finishing off this group.
In the end we'd want to re-process duplicates forming
multiple groups from the refs, likely by just collecting
all candidates (including duplicates and split points
below) in a vector and then process them together. */
continue;
}
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug tree-optimization/87105] Autovectorization [X86, SSE2, AVX2, DoublePrecision]
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
I've also had patches adding an early phiopt pass which would have solved the
CFG mess VRP creates.
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Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Mon, 27 Aug 2018 07:52:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
Known to work| |7.3.0
Summary|UndefinedBehaviorSanitizer |[8/9 Regression]
|vptr false positive with |UndefinedBehaviorSanitizer
|virtual inheritance only |vptr false positive with
|with -fno-sanitize-recover |virtual inheritance only
| |with -fno-sanitize-recover
Known to fail| |8.2.0, 9.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
It started with my commit r254754, where we zeroed vptr in no recovery mode.
Jason or Nathan, is it valid C++ code or do I miss something in the
implementation?
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Subject: [Bug c++/87107] Template instantiation is 50x slower than with clang++
Date: Mon, 27 Aug 2018 07:52:00 -0000
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--- Comment #1 from Mateusz Loskot <mateusz at loskot dot net> ---
There was similar bug reported to GCC 8.1, fixed in 8.2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86320
However, I'm not seeing any improvement compiling the Frédéric's sample
gcc-is-long-minimum-and-standalone.cpp with GCC 8.2 on Linux.
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Subject: [Bug tree-optimization/87110] [9 Regresssion] tree check fail in to_wide, at tree.h:5523
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Component|c |tree-optimization
Version|8.0 |9.0
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Subject: [Bug c++/87107] Template instantiation is 50x slower than with clang++
Date: Mon, 27 Aug 2018 07:55:00 -0000
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--- Comment #2 from Frédéric <ufospoke at gmail dot com> ---
Yes, I've seen that one and saw it was fixed before 8.2.0. I wasn't sure
actually if it was included in 8.2.0 as it was solved few weeks before 8.2.0
was out.
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Subject: [Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 08:01:14 2018
New Revision: 263870
URL: https://gcc.gnu.org/viewcvs?rev=263870&root=gcc&view=rev
Log:
Print default options selection for -march,-mcpu and -mtune for aarch64 (PR
driver/83193).
2018-08-27 Martin Liska <mliska@suse.cz>
PR driver/83193
* config/aarch64/aarch64.c (aarch64_override_options_internal):
Set default values for x_aarch64_*_string strings.
* config/aarch64/aarch64.opt: Remove --{march,mcpu,mtune}==
prefix. For -mabi do not print '=ABI' in help and use
<option_value> format for -msve-vector-bits and -moverride
options.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/config/aarch64/aarch64.opt
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Subject: [Bug gcov-profile/87069] gcov accumulates results for identical files
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 08:01:54 2018
New Revision: 263871
URL: https://gcc.gnu.org/viewcvs?rev=263871&root=gcc&view=rev
Log:
Do not read gcda files multiple times (PR gcov-profile/87069).
2018-08-27 Martin Liska <mliska@suse.cz>
PR gcov-profile/87069
* gcov.c (process_file): Record files already processed
and warn about a file being processed multiple times.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gcov.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, not planning to backport that.
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jim at meyering dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jim at meyering dot net
--- Comment #4 from jim at meyering dot net ---
Thanks for considering the addition. IME, the vast majority (probably "all I've
seen") of such "useless" if stmts have been attempts to avoid what used to be
UB/segfault on old systems, or simply due to people not realizing that
free(NULL) is now known to be ok on all reasonable portability targets.
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Subject: [Bug rtl-optimization/87065] [7/8/9 Regression] combine causes ICE in trunc_int_for_mode
Date: Mon, 27 Aug 2018 08:42:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Aug 27 08:41:22 2018
New Revision: 263872
URL: https://gcc.gnu.org/viewcvs?rev=263872&root=gcc&view=rev
Log:
PR rtl-optimization/87065
* combine.c (simplify_if_then_else): Formatting fix.
(if_then_else_cond): Guard MULT optimization with SCALAR_INT_MODE_P
check.
(known_cond): Don't return const_true_rtx for vector modes. Use
CONST0_RTX instead of const0_rtx. Formatting fixes.
* gcc.target/i386/pr87065.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr87065.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/87065] [7/8/9 Regression] combine causes ICE in trunc_int_for_mode
Date: Mon, 27 Aug 2018 09:15:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Aug 27 09:14:38 2018
New Revision: 263873
URL: https://gcc.gnu.org/viewcvs?rev=263873&root=gcc&view=rev
Log:
PR rtl-optimization/87065
* combine.c (simplify_if_then_else): Formatting fix.
(if_then_else_cond): Guard MULT optimization with SCALAR_INT_MODE_P
check.
(known_cond): Don't return const_true_rtx for vector modes. Use
CONST0_RTX instead of const0_rtx. Formatting fixes.
* gcc.target/i386/pr87065.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr87065.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/combine.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/57492] Optimize 2.0**i to ldexp(1.0,i)
Date: Mon, 27 Aug 2018 09:24:00 -0000
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--- Comment #3 from Antony Polukhin <antoshkka at gmail dot com> ---
More examples:
double test_uns(unsigned u) {
return __builtin_pow(2, u);
}
double test_int(int i) {
return __builtin_pow(2, i);
}
Above two functions clang optimizes to exp2 and ldexp calls:
test_uns(unsigned int): # @test_uns(unsigned int)
mov eax, edi
cvtsi2sd xmm0, rax
jmp exp2 # TAILCALL
.LCPI1_0:
.quad 4607182418800017408 # double 1
test_int(int): # @test_int(int)
movsd xmm0, qword ptr [rip + .LCPI1_0] # xmm0 = mem[0],zero
jmp ldexp # TAILCALL
GCC still uses pow for both cases:
test_uns(unsigned int):
mov edi, edi
pxor xmm1, xmm1
movsd xmm0, QWORD PTR .LC0[rip]
cvtsi2sdq xmm1, rdi
jmp pow
test_int(int):
pxor xmm1, xmm1
movsd xmm0, QWORD PTR .LC0[rip]
cvtsi2sd xmm1, edi
jmp pow
.LC0:
.long 0
.long 1073741824
Tested on GCC trunk 9.0.
>From gcc-bugs-return-613833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 09:41:32 2018
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
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--- Comment #9 from pipcet at gmail dot com ---
(In reply to Richard Biener from comment #6)
> So on GIMPLE the following are not canonicalized:
>
> <bb 2> [local count: 1073741825]:
> _1 = i_4(D) & 7;
> _8 = (int) i_4(D);
> if (_1 == 6)
> goto <bb 3>; [20.97%]
> else
> goto <bb 4>; [79.03%]
>
> vs.
>
> <bb 2> [local count: 1073741825]:
> _1 = i_5(D) + 18446744073709551610;
> _2 = _1 & 7;
> _9 = (int) i_5(D);
> if (_2 == 0)
> goto <bb 3>; [34.00%]
> else
> goto <bb 4>; [66.00%]
>
> where I'd call the former better. Thus for some unknown constraint
> on @1, @2 and @3
>
> (simplify
> (eq (convert? (bit_and (plus @0 INTEGER_CST@3) @2)) @1)
> (eq (convert (bit_and @0 @2)) { ... }))
I suggest that the constraint be that @2 is of the form
000...000111...111000...000 and @3 is of the form
???...??????...???000...000 and @1 is zero.
So your plan is to canonicalize to (X & MASK) == VALUE first, then do something
target-dependent to emit (X - VALUE) & MASK == 0 instead? How would the target
realize that? I tried adding a peephole2 rule but that's apparently too late
and doesn't match the insn sequences in Paul's test.
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
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--- Comment #10 from pipcet at gmail dot com ---
Created attachment 44606
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44606&action=edit
canonicalize to (A&B) == C
This canonicalizes to the worse code on x86_64.
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Subject: [Bug tree-optimization/57492] Optimize 2.0**i to ldexp(1.0,i)
Date: Mon, 27 Aug 2018 10:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Should be relatively easy to fix with new match.pd rules.
>From gcc-bugs-return-613836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 11:17:37 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Mon, 27 Aug 2018 11:17:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With my very limited understanding of the inheritance and ABI, I think the
testcase is valid.
The problem is I believe in that if there are nearly empty virtual bases that
the ABI requires to reuse the virtual pointers in that case:
/* A "nearly-empty" virtual base class can be the primary base
class, if no non-virtual polymorphic base can be found. Look for
a nearly-empty virtual dynamic base that is not already a primary
base of something in the hierarchy. If there is no such base,
just pick the first nearly-empty virtual base. */
the build_clobber_this () handles this by:
/* If we have virtual bases, clobber the whole object, but only if we're in
charge. If we don't have virtual bases, clobber the as-base type so we
don't mess with tail padding. */
bool vbases = CLASSTYPE_VBASECLASSES (current_class_type);
...
if (vbases)
exprstmt = build_if_in_charge (exprstmt);
So, to match this it would be just adding
if (CLASSTYPE_VBASECLASSES (current_class_type)) stmt = build_if_in_charge
(stmt);
before finish_decl_cleanup.
Though, if all the virtual bases are non-empty, the sharing of vptr doesn't
occur
in that case and we'd not clear it (e.g. if in the testcase there is int a;
non-static data member in A,
we wouldn't clear B's vptr in not-in-charge B::~B even when A has a different
vptr).
So I wonder if the following is right:
--- gcc/cp/decl.c.jj 2018-08-26 22:41:48.574350447 +0200
+++ gcc/cp/decl.c 2018-08-27 12:59:33.068314097 +0200
@@ -15696,6 +15696,14 @@ begin_destructor_body (void)
tree stmt = cp_build_modify_expr (input_location, vtbl_ptr,
NOP_EXPR, vtbl,
tf_warning_or_error);
+ /* If the vptr is shared with some virtual nearly empty base,
+ don't clear it if not in charge, the dtor of the virtual
+ nearly empty base will do that later. */
+ if (CLASSTYPE_VBASECLASSES (current_class_type)
+ && CLASSTYPE_PRIMARY_BINFO (current_class_type)
+ && BINFO_VIRTUAL_P
+ (CLASSTYPE_PRIMARY_BINFO (current_class_type)))
+ stmt = build_if_in_charge (stmt);
finish_decl_cleanup (NULL_TREE, stmt);
}
else
>From gcc-bugs-return-613837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 11:41:08 2018
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Subject: [Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
Date: Mon, 27 Aug 2018 11:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r260541.
Simpler testcase:
void bar (char *);
int
foo (int n)
{
char v[n];
bar (v);
return __builtin_strncmp (&v[1], "aaa", 3);
}
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87112] New: [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
Date: Mon, 27 Aug 2018 11:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87112
Bug ID: 87112
Summary: [9 Regression] ICE in fold_binary_loc, at
fold-const.c:9334
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: law at gcc dot gnu.org
Target Milestone: ---
Starting from r263855 we ICE on:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c
-O1 -c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:
In function ‘test_strnlen_str_cst’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:25:6:
warning: ‘strnlen’ specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
25 | A (strnlen ("", SIZE_MAX) == 0);
| ^~~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:32:6:
warning: ‘strnlen’ specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
32 | A (strnlen ("1", SIZE_MAX) == 1);
| ^~~~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:33:6:
warning: ‘strnlen’ specified bound 18446744073709551614 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
33 | A (strnlen ("1", -2) == 1);
| ^~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:41:6:
warning: ‘strnlen’ specified bound 18446744073709551615 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
41 | A (strnlen ("123", SIZE_MAX) == 3);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:42:6:
warning: ‘strnlen’ specified bound 18446744073709551614 exceeds maximum object
size 9223372036854775807 [-Wstringop-overflow=]
42 | A (strnlen ("123", -2) == 3);
| ^~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
during RTL pass: expand
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:
In function ‘test_strnlen_str_range’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:51:6:
internal compiler error: in fold_binary_loc, at fold-const.c:9334
51 | A (strnlen ("", r_0_3) == 0);
| ^~~~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro ‘A’
14 | ((expr) ? (void)0 \
| ^~~~
0xbf973c fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/fold-const.c:9333
0xc088f8 fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/fold-const.c:12360
0x9cbdb7 expand_builtin_strnlen
../../gcc/builtins.c:3023
0x9d9db1 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
../../gcc/builtins.c:7331
0xbb9961 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:10943
0xbac1ce expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/expr.c:8209
0xba15c8 store_expr(tree_node*, rtx_def*, int, bool, bool)
../../gcc/expr.c:5636
0xb9fbf8 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/expr.c:5420
0xa1750d expand_call_stmt
../../gcc/cfgexpand.c:2685
0xa1a68f expand_gimple_stmt_1
../../gcc/cfgexpand.c:3575
0xa1ad1d expand_gimple_stmt
../../gcc/cfgexpand.c:3734
0xa2356a expand_gimple_basic_block
../../gcc/cfgexpand.c:5770
0xa24f3c execute
../../gcc/cfgexpand.c:6373
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
Target Milestone|--- |9.0
Ever confirmed|0 |1
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Subject: [Bug tree-optimization/86927] [8/9 Regression] Gcc miscompiles at -O3 on valid code
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44607
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44607&action=edit
patch
I am testing the attached.
>From gcc-bugs-return-613841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 12:18:36 2018
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Subject: [Bug tree-optimization/86702] [9 Regression] SPEC CPU2006 400.perlbench, CPU2017 500.perlbench_r ~3% performance drop after r262247
Date: Mon, 27 Aug 2018 12:18:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 12:17:54 2018
New Revision: 263877
URL: https://gcc.gnu.org/viewcvs?rev=263877&root=gcc&view=rev
Log:
Fix probabilities for jump table (PR tree-optimization/86702).
2018-08-27 Martin Liska <mliska@suse.cz>
PR tree-optimization/86702
* tree-switch-conversion.c (jump_table_cluster::emit):
Make probabilities even for values in jump table
according to number of cases handled.
(switch_decision_tree::compute_cases_per_edge): Pass
argument to reset_out_edges_aux function.
(switch_decision_tree::analyze_switch_statement): Likewise.
* tree-switch-conversion.h (switch_decision_tree::reset_out_edges_aux):
Make it static.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-switch-conversion.c
trunk/gcc/tree-switch-conversion.h
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Subject: [Bug libstdc++/78113] std::variant and std::visit's current implementations do not get optimized out (compared to "recursive visitation")
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--- Comment #1 from Antony Polukhin <antoshkka at gmail dot com> ---
Note that this bug is related to Bug 86912. Fixing Bug 86912 should
automatically resolve this issue (but not vice versa).
>From gcc-bugs-return-613843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 12:21:48 2018
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Subject: [Bug tree-optimization/86847] [9 Regression] Switch code size growth
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 12:21:11 2018
New Revision: 263879
URL: https://gcc.gnu.org/viewcvs?rev=263879&root=gcc&view=rev
Log:
Improve switch code emission for a balanced tree (PR tree-optimization/86847).
2018-08-27 Martin Liska <mliska@suse.cz>
PR tree-optimization/86847
* tree-switch-conversion.c (switch_decision_tree::dump_case_nodes):
Dump also subtree probability.
(switch_decision_tree::do_jump_if_equal): New function.
(switch_decision_tree::emit_case_nodes): Handle special
situations in balanced tree that can be emitted much simpler.
Fix calculation of probabilities that happen in tree expansion.
* tree-switch-conversion.h (struct cluster): Add
is_single_value_p.
(struct simple_cluster): Likewise.
(struct case_tree_node): Add new function has_child.
(do_jump_if_equal): New.
2018-08-27 Martin Liska <mliska@suse.cz>
PR tree-optimization/86847
* gcc.dg/tree-ssa/switch-3.c: New test.
* gcc.dg/tree-ssa/vrp105.c: Remove.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/switch-3.c
Removed:
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp105.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-switch-conversion.c
trunk/gcc/tree-switch-conversion.h
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Subject: [Bug libstdc++/78113] std::variant and std::visit's current implementations do not get optimized out (compared to "recursive visitation")
Date: Mon, 27 Aug 2018 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78113
--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
Here's another example:
#include <variant>
struct A {};
struct B : A {};
struct C : A {};
struct D : A {};
struct E : A {};
struct X : A {};
struct visitor {
template <class T>
A& operator()(T& v) const noexcept { return v; }
};
A& get_base(std::variant<B, C, D, E, X>& in) {
return std::visit(visitor{}, in);
}
GCC's current implementation via table of function pointers is badly optimized
by GCC-9 (trunk) and generates a lot of equal functions:
https://godbolt.org/z/g9hJjV
Boost's approach produces a better result on the same compiler:
https://godbolt.org/z/BnemR1
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Subject: [Bug tree-optimization/86847] [9 Regression] Switch code size growth
Date: Mon, 27 Aug 2018 12:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/86702] [9 Regression] SPEC CPU2006 400.perlbench, CPU2017 500.perlbench_r ~3% performance drop after r262247
Date: Mon, 27 Aug 2018 12:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Should be fixed now, please reopen it it still exists.
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Bug 26163 depends on bug 86702, which changed state.
Bug 86702 Summary: [9 Regression] SPEC CPU2006 400.perlbench, CPU2017 500.perlbench_r ~3% performance drop after r262247
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86702
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----------------------------------------------------------------------------
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Subject: [Bug c++/87113] New: ICE in adjust_temp_type at cp/constexpr.c:1205
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87113
Bug ID: 87113
Summary: ICE in adjust_temp_type at cp/constexpr.c:1205
Product: gcc
Version: 7.1.0
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Severity: normal
Priority: P3
Component: c++
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Created attachment 44608
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44608&action=edit
intermediate file that produces error
See attached intermediate file (build with -std=c++17 -fconcepts).
This produces the following error:
test.cpp: In Funktion »int main()«:
test.cpp:8:87: in constexpr-Ersetzung von
»seqan3::qualified<seqan3::union_composition<seqan3::dna4, seqan3::gap>,
seqan3::phred42>((seqan3::gap::GAP, seqan3::gap()))«
test.cpp:8:87: interner Compiler-Fehler: in adjust_temp_type, bei
cp/constexpr.c:1205
0x6d0c5c adjust_temp_type
../.././gcc/cp/constexpr.c:1205
0x6d344d cxx_bind_parameters_in_call
../.././gcc/cp/constexpr.c:1279
0x6d344d cxx_eval_call_expression
../.././gcc/cp/constexpr.c:1535
0x6d48c6 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4010
0x6d44f3 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4127
0x6d44f3 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4127
0x6d499b cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4477
0x6d4eb8 cxx_eval_statement_list
../.././gcc/cp/constexpr.c:3743
0x6d4eb8 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4471
0x6d3da6 cxx_eval_call_expression
../.././gcc/cp/constexpr.c:1642
0x6d48c6 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:4010
0x6d8614 cxx_eval_outermost_constant_expr
../.././gcc/cp/constexpr.c:4640
0x6da2fe maybe_constant_value(tree_node*, tree_node*)
../.././gcc/cp/constexpr.c:4855
0x6c64ea cp_fully_fold(tree_node*)
../.././gcc/cp/cp-gimplify.c:1976
0x5f9c4a store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../.././gcc/cp/typeck2.c:841
0x5b7f6d check_initializer
../.././gcc/cp/decl.c:6365
0x5bb7ca cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../.././gcc/cp/decl.c:7037
0x64a607 cp_parser_init_declarator
../.././gcc/cp/parser.c:19380
0x64ae4d cp_parser_simple_declaration
../.././gcc/cp/parser.c:12777
0x64ba55 cp_parser_block_declaration
../.././gcc/cp/parser.c:12602
Bitte senden Sie einen vollständigen Fehlerbericht auf Englisch ein;
inclusive vorverarbeitetem Quellcode, wenn es dienlich ist.
Please include the complete backtrace with any bug report.
Weitere Hinweise finden Sie unter »<https://gcc.gnu.org/bugs/>«.
Tested on
% uname -a
Linux epsilon 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u3 (2018-08-19) x86_64
GNU/Linux
% g++-7.1.0 --version
g++ (GCC) 7.1.0
Copyright (C) 2017 Free Software Foundation, Inc.
Dies ist freie Software; die Kopierbedingungen stehen in den Quellen. Es
gibt KEINE Garantie; auch nicht für MARKTGÄNGIGKEIT oder FÜR SPEZIELLE ZWECKE.
Verified on snapshots of g++8 and g++9
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Subject: [Bug c++/87113] ICE in adjust_temp_type at cp/constexpr.c:1205
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--- Comment #1 from smehringer <svenja.mehringer at gmail dot com> ---
Created attachment 44609
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workaround of error
Inserting a member variable into the struct prevents ICE.
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P1
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to chengming from comment #4)
> Created attachment 44602 [details]
> ELF file
>
> compiled with command
> gcc -v -save-temps -m32 -march=i386 -fcf-protection=none -o onlyReturn
> onlyReturn.c > output.txt 2>&1
Fedora 28 run-time only supports i686 or above. You can't use any libraries
on Fedora 28.
>From gcc-bugs-return-613850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 12:47:29 2018
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Subject: [Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44610
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44610&action=edit
gcc9-pr87099.patch
Untested fix.
>From gcc-bugs-return-613853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:02:04 2018
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Subject: [Bug libstdc++/87071] libstdc++ crashes during GPU driver initialization with suspected attempt to execute unsupported instruction by Athlon64 X2 TK-57
Date: Mon, 27 Aug 2018 13:02:00 -0000
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--- Comment #9 from Sergey Kondakov <virtuousfox at gmail dot com> ---
(In reply to Alexander Monakov from comment #8)
> You should have mentioned you were using a custom-compiled Mesa, not the
> distribution package (both here and in the original report to Mesa project).
>
> For some reason the disasm in the provided log is unusable (shows assembly
> of the outermost frame), but downloading your package shows that failing
> instruction is
>
> 928ea: c5 fa 6f 05 0e 09 c3 00 vmovdqu 0xc3090e(%rip),%xmm0
> # cc3200 <amdgpu_winsys_create@@Base+0x1539a0>
>
> i.e. an AVX instruction, not supported on the CPU. Given that you were using
> Clang to compile the package, this is not a GCC issue.
You actually managed to get some info from separate package ? Amazing.
I should have but half of my system is customized in some way, by me or by
others via OBS's community repositories, at this point + it's rolling release
distro. And my attention was completely drawn from Mesa. But here's the
interesting part: a guy from openSUSE just figured out that offending code was
launched by in-Mesa "SWR", Intel's AVX-based software renderer, which, for some
reason, tried to do something even though it should not load unless explicitly
requested or if direct rendering has failed. And it doesn't, if Mesa is built
with gcc & linked with ld, even with it enabled !
One thing doesn't build with gcc, other fails with clang… there is no peace
with Mesa. Anyway, thanks for your advices, I was getting desperate with that
weird issue.
>From gcc-bugs-return-613854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:10:20 2018
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Subject: [Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed on the trunk? Any plans to backport?
>From gcc-bugs-return-613855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:19:45 2018
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Subject: [Bug rtl-optimization/87065] [7 Regression] combine causes ICE in trunc_int_for_mode
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Summary|[7/8/9 Regression] combine |[7 Regression] combine
|causes ICE in |causes ICE in
|trunc_int_for_mode |trunc_int_for_mode
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ so far.
>From gcc-bugs-return-613856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:21:38 2018
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Subject: [Bug c++/86706] [8 Regression] ICE in build_base_path, at cp/class.c:294
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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|build_base_path, at |build_base_path, at
|cp/class.c:294 |cp/class.c:294
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-613857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:22:06 2018
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Subject: [Bug sanitizer/86962] [9 Regression] ICE in sanitize_rewrite_addressable_params, at sanopt.c:1173 with nested functions
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 13:21:28 2018
New Revision: 263882
URL: https://gcc.gnu.org/viewcvs?rev=263882&root=gcc&view=rev
Log:
Sanopt: ignore params with DECL_HAS_VALUE_EXPR_P (PR sanitizer/86962).
2018-08-27 Martin Liska <mliska@suse.cz>
PR sanitizer/86962
* sanopt.c (sanitize_rewrite_addressable_params): Ignore
params with DECL_HAS_VALUE_EXPR_P.
2018-08-27 Martin Liska <mliska@suse.cz>
PR sanitizer/86962
* gcc.dg/asan/pr86962.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/asan/pr86962.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/sanopt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:23:58 2018
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Subject: [Bug tree-optimization/86010] [7/8/9 Regression] redundant memset with smaller size not eliminated
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed for 9+?
>From gcc-bugs-return-613859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:23:22 2018
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Subject: [Bug sanitizer/86962] [8 Regression] ICE in sanitize_rewrite_addressable_params, at sanopt.c:1173 with nested functions
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|8.2.0 |9.0
Summary|[9 Regression] ICE in |[8 Regression] ICE in
|sanitize_rewrite_addressabl |sanitize_rewrite_addressabl
|e_params, at sanopt.c:1173 |e_params, at sanopt.c:1173
|with nested functions |with nested functions
Known to fail|9.0 |8.2.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, I'm planning to backport that to GCC 8 branch.
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Subject: [Bug middle-end/86121] [9 Regression] missing -Wstringop-overflow on strcpy followed by strcat
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed?
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Subject: [Bug middle-end/85817] [9 Regression] ICE in expand_call at gcc/calls.c:4291
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed?
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Subject: [Bug rtl-optimization/85805] [7/8/9 Regression] Wrong code for 64 bit comparisons on avr-gcc
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9+ then?
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Subject: [Bug tree-optimization/85699] [9 regression] gcc.dg/nextafter-2.c fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug lto/85583] [9 Regression] lto1: internal compiler error: in lto_balanced_map, at lto/lto-partition.c:833
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed?
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Subject: [Bug c++/87113] ICE in adjust_temp_type at cp/constexpr.c:1205
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/85512] [8/9 Regression] gcc generating non-existing sshr with immh == 0
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/81033] [8/9 Regression] there are cases where ld64 is not able to determine correct atom boundaries from the output GCC currently produces
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--- Comment #46 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is this fixed for 9+ so far?
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Subject: [Bug target/81685] [7/8/9 Regression] FAIL: g++.dg/debug/dwarf2/inline-ns-2.C -std=gnu++* (internal compiler error) on darwin
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed for 9+ so far?
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Subject: [Bug middle-end/85817] [9 Regression] ICE in expand_call at gcc/calls.c:4291
Date: Mon, 27 Aug 2018 13:29:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug lto/85583] [9 Regression] lto1: internal compiler error: in lto_balanced_map, at lto/lto-partition.c:833
Date: Mon, 27 Aug 2018 13:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Yes, I would notice that as I'm building quite some packages with LTO not on
daily basis.
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Subject: [Bug bootstrap/81033] [8/9 Regression] there are cases where ld64 is not able to determine correct atom boundaries from the output GCC currently produces
Date: Mon, 27 Aug 2018 13:32:00 -0000
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--- Comment #47 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #46)
> Is this fixed for 9+ so far?
Yes, fixed on trunk .. leaving it open pending backports.
>From gcc-bugs-return-613872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:43:36 2018
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Subject: [Bug sanitizer/86962] [8 Regression] ICE in sanitize_rewrite_addressable_params, at sanopt.c:1173 with nested functions
Date: Mon, 27 Aug 2018 13:43:00 -0000
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
My change is not on the 8 branch though.
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Subject: [Bug c++/87091] Malformed fix-it hint for missing header
Date: Mon, 27 Aug 2018 13:47:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Mon Aug 27 13:46:32 2018
New Revision: 263884
URL: https://gcc.gnu.org/viewcvs?rev=263884&root=gcc&view=rev
Log:
diagnostics: show an extra line of context in line-insertion fix-it hints (PR
87091)
This patch tweaks how we print line-insertion fix-it hints, so that
the line before the insertion point is also printed, to give the user
more context on the proposed change.
For example, it changes:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:22: note: message
+++ |+#include <vector>
74 | #endif
....
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~
to:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:22: note: message
73 | # include <debug/vector>
+++ |+#include <vector>
74 | #endif
....
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~
gcc/ChangeLog:
PR 87091
* diagnostic-show-locus.c (get_line_span_for_fixit_hint): Show the
line above for line-insertion fix-it hints.
(selftest::test_fixit_insert_containing_newline): Update the
expected results, and add a test with line-numbering enabled.
gcc/testsuite/ChangeLog:
PR 87091
* g++.dg/pr85523.C: Extend expected output to show line
before line-insertion fix-it hint.
* gcc.dg/plugin/diagnostic-test-show-locus-bw-line-numbers.c
(test_fixit_insert_newline): Add previous line to expected output.
* gcc.dg/plugin/diagnostic-test-show-locus-bw.c: Likewise.
* gcc.dg/plugin/diagnostic-test-show-locus-color.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/diagnostic-show-locus.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/pr85523.C
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-bw-line-numbers.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-bw.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-color.c
>From gcc-bugs-return-613874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:47:30 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Mon, 27 Aug 2018 13:47:00 -0000
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--- Comment #4 from Rich Felker <bugdal at aerifal dot cx> ---
I'm aware, but that makes it an invalid transformation. To be valid, the
transformation must only be performed in cases where it's provably not
exceptional.
The same principle applies to all the pathological results where
p=malloc(SIZE_MAX);if(!p)...;free(p) is getting optimized out (breaking code
that relies on "if malloc succeeds, pointer arithmetic in the allocated object
is valid"). This kind of error is a high-level optimization strategy mistake in
gcc that needs to be addressed and fixed.
>From gcc-bugs-return-613875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 13:49:12 2018
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Subject: [Bug sanitizer/86962] [8 Regression] ICE in sanitize_rewrite_addressable_params, at sanopt.c:1173 with nested functions
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #4)
> My change is not on the 8 branch though.
Ah, sorry, then we're done.
>From gcc-bugs-return-613876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:02:50 2018
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Subject: [Bug c++/87091] Malformed fix-it hint for missing header
Date: Mon, 27 Aug 2018 14:02:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Mon Aug 27 14:02:05 2018
New Revision: 263885
URL: https://gcc.gnu.org/viewcvs?rev=263885&root=gcc&view=rev
Log:
Less verbose fix-it hints for missing header files (PR 87091)
This patch tweaks maybe_add_include_fixit so that if we're emitting a note
about adding the header file, the note's primary location will be replaced
by that of the fix-it hint, to avoid repeating a location we've already
emitted (or one close to it).
For example, this simplifies:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:27: error: msg 1
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~~~~
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:22: note: msg 2
73 | # include <debug/vector>
+++ |+#include <vector>
74 | #endif
....
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~
to:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:27: error: msg 1
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~~~~
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1: note: msg 2
73 | # include <debug/vector>
+++ |+#include <vector>
74 | #endif
eliminating the repetition of line 87 in the note.
Doing so requires converting show_caret_p to a tri-state, to avoid
meaninglessly printing a caret for the first column in the next line
(and colorizing it):
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1: note: msg 2
73 | # include <debug/vector>
+++ |+#include <vector>
74 | #endif
| ^
gcc/c-family/ChangeLog:
PR 87091
* c-common.c (c_cpp_error): Update for conversion of show_caret_p
to a tri-state.
(maybe_suggest_missing_token_insertion): Likewise.
(maybe_add_include_fixit): Add param "override_location". If set,
and source-printing is enabled, then override the rich_location's
primary location with that of the insertion point for the fix-it
hint, marking it with SHOW_LINES_WITHOUT_RANGE.
* c-common.h (extern void maybe_add_include_fixit): Add bool
param.
* c-format.c (selftest::test_type_mismatch_range_labels): Update
for conversion of show_caret_p to a tri-state.
* c-warn.c (warn_for_restrict): Likewise.
* known-headers.cc
(suggest_missing_header::~suggest_missing_header): Update call to
maybe_add_include_fixit to suggest overriding the location, as it
is for a note.
gcc/c/ChangeLog:
PR 87091
* c-decl.c (implicitly_declare): Update call to
maybe_add_include_fixit to suggest overriding the location, as it
is for a note.
* c-objc-common.c (c_tree_printer): Update for conversion of
show_caret_p to a tri-state.
gcc/cp/ChangeLog:
PR 87091
* decl.c (grokdeclarator): Update for conversion of show_caret_p
to a tri-state.
* error.c (cp_printer): Likewise.
* name-lookup.c (maybe_suggest_missing_std_header): Update call to
maybe_add_include_fixit to suggest overriding the location, as it
is for a note.
* parser.c (cp_parser_string_literal): Update for conversion of
show_caret_p to a tri-state.
(cp_parser_elaborated_type_specifier): Likewise.
(set_and_check_decl_spec_loc): Likewise.
* pt.c (listify): Update call to maybe_add_include_fixit to not
override the location, as it is for an error.
* rtti.c (typeid_ok_p): Likewise.
gcc/ChangeLog:
PR 87091
* diagnostic-show-locus.c (class layout_range): Update for
conversion of show_caret_p to a tri-state.
(layout_range::layout_range): Likewise.
(make_range): Likewise.
(layout::maybe_add_location_range): Likewise.
(layout::should_print_annotation_line_p): Don't show annotation
lines for ranges that are SHOW_LINES_WITHOUT_RANGE.
(layout::get_state_at_point): Update for conversion of
show_caret_p to a tri-state. Bail out early for
SHOW_LINES_WITHOUT_RANGE, so that such ranges don't affect
underlining or source colorization.
(gcc_rich_location::add_location_if_nearby): Update for conversion
of show_caret_p to a tri-state.
(selftest::test_one_liner_multiple_carets_and_ranges): Likewise.
(selftest::test_one_liner_fixit_replace_equal_secondary_range):
Likewise.
(selftest::test_one_liner_labels): Likewise.
* gcc-rich-location.c (gcc_rich_location::add_expr): Update for
conversion of show_caret_p to a tri-state.
* pretty-print.c (text_info::set_location): Likewise.
* pretty-print.h (text_info::set_location): Likewise.
* substring-locations.c (format_warning_n_va): Likewise.
* tree-diagnostic.c (default_tree_printer): Likewise.
* tree-pretty-print.c (newline_and_indent): Likewise.
gcc/fortran/ChangeLog:
PR 87091
* error.c (gfc_format_decoder): Update for conversion of
show_caret_p to a tri-state.
gcc/testsuite/ChangeLog:
PR 87091
* gcc.dg/empty.h: New file.
* gcc.dg/fixits-pr84852-1.c: Update for move of fix-it hint to
top of file and removal of redundant second printing of warning
location.
* gcc.dg/fixits-pr84852-2.c: Likewise.
* gcc.dg/missing-header-fixit-3.c: Likewise.
* gcc.dg/missing-header-fixit-4.c: New test.
* gcc.dg/plugin/diagnostic_plugin_test_show_locus.c: Update for
conversion of show_caret_p to a tri-state.
libcpp/ChangeLog:
PR 87091
* include/line-map.h (enum range_display_kind): New enum.
(struct location_range): Replace field "m_show_caret_p" with
"m_range_display_kind", converting from bool to the new enum.
(class rich_location): Add example of line insertion fix-it hint.
(rich_location::add_range): Convert param "show_caret_p" from bool
to enum range_display_kind and rename to "range_display_kind",
giving it a default of SHOW_RANGE_WITHOUT_CARET.
(rich_location::set_range): Likewise, albeit without a default.
* line-map.c (rich_location::rich_location): Update for conversion
of show_caret_p to tri-state enum.
(rich_location::add_range): Likewise.
(rich_location::set_range): Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/empty.h
trunk/gcc/testsuite/gcc.dg/missing-header-fixit-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c-family/c-format.c
trunk/gcc/c-family/c-warn.c
trunk/gcc/c-family/known-headers.cc
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/c/c-objc-common.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/error.c
trunk/gcc/cp/name-lookup.c
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/rtti.c
trunk/gcc/diagnostic-show-locus.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/error.c
trunk/gcc/gcc-rich-location.c
trunk/gcc/pretty-print.c
trunk/gcc/pretty-print.h
trunk/gcc/substring-locations.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/fixits-pr84852-1.c
trunk/gcc/testsuite/gcc.dg/fixits-pr84852-2.c
trunk/gcc/testsuite/gcc.dg/missing-header-fixit-3.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic_plugin_test_show_locus.c
trunk/gcc/tree-diagnostic.c
trunk/gcc/tree-pretty-print.c
trunk/libcpp/ChangeLog
trunk/libcpp/include/line-map.h
trunk/libcpp/line-map.c
>From gcc-bugs-return-613878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:09:48 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87091] Malformed fix-it hint for missing header
Date: Mon, 27 Aug 2018 14:09:00 -0000
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I've been using this PR to track various tweaks to how we print that fix-it
hint. As well as the bug fix referred to in comment #1, we've gone from:
In file included from
../x86_64-pc-linux-gnu/libstdc++-v3/include/debug/vector:34,
from /tmp/t.cc:2:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:27: error: ‘vector’ in
namespace ‘std’ does not name a template type
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~~~~
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:22: note: ‘std::vector’
is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1:
++ |+#include <vector>
74 | #endif
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:22:
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~
to:
In file included from
../x86_64-pc-linux-gnu/libstdc++-v3/include/debug/vector:34,
from /tmp/t.cc:2:
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:87:27: error: ‘vector’ in
namespace ‘std’ does not name a template type
87 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~~~~
../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1: note: ‘std::vector’ is
defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
73 | # include <debug/vector>
++ |+#include <vector>
74 | #endif
I think that's all for now.
>From gcc-bugs-return-613877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:09:27 2018
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Subject: [Bug tree-optimization/85758] questionable bitwise folding (missing single use check?)
Date: Mon, 27 Aug 2018 14:09:00 -0000
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Author: amonakov
Date: Mon Aug 27 14:08:50 2018
New Revision: 263887
URL: https://gcc.gnu.org/viewcvs?rev=263887&root=gcc&view=rev
Log:
match.pd: add single-use check for (x & y) ^ y -> ~x & y (PR 85758)
PR tree-optimization/85758
* match.pd ((X & Y) ^ Y): Add :s qualifier to inner expression.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
>From gcc-bugs-return-613879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:11:24 2018
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Subject: [Bug other/84889] Ideas on revamping how we format diagnostics
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--- Comment #13 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
See also the various changes I've made in response to PR 87091.
>From gcc-bugs-return-613881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:12:58 2018
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Subject: [Bug target/81685] [7/8 Regression] FAIL: g++.dg/debug/dwarf2/inline-ns-2.C -std=gnu++* (internal compiler error) on darwin
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] FAIL: |[7/8 Regression] FAIL:
|g++.dg/debug/dwarf2/inline- |g++.dg/debug/dwarf2/inline-
|ns-2.C -std=gnu++* |ns-2.C -std=gnu++*
|(internal compiler error) |(internal compiler error)
|on darwin |on darwin
--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> So fixed for 9+ so far?
fixed on trunk.
>From gcc-bugs-return-613880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:12:28 2018
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Subject: [Bug tree-optimization/86991] [8/9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6919
Date: Mon, 27 Aug 2018 14:12:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm. To me it looks like the assert that triggers:
if (orig_stmt_info)
gcc_assert (tmp == orig_stmt_info
|| REDUC_GROUP_FIRST_ELEMENT (tmp) == orig_stmt_info);
else
/* We changed STMT to be the first stmt in reduction chain, hence we
check that in this case the first element in the chain is STMT. */
gcc_assert (tmp == stmt_info
|| REDUC_GROUP_FIRST_ELEMENT (tmp) == stmt_info);
doesn't work this way for SLP reductions with a reduction path since
tmp (STMT_VINFO_REDUC_DEF) is obviously different from stmt_info
(the first non-PHI). But what the vectorizer tries to do makes sense.
Maybe test coverage was too low to uncover this up until now. It looks like
the testcase relies on some unfortunate invariant code in the IL.
Did you have a testcase that computed sth more meaningful?
>From gcc-bugs-return-613882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:17:42 2018
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Subject: [Bug tree-optimization/86927] [8/9 Regression] Gcc miscompiles at -O3 on valid code
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Aug 27 14:17:03 2018
New Revision: 263888
URL: https://gcc.gnu.org/viewcvs?rev=263888&root=gcc&view=rev
Log:
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86927] [8 Regression] Gcc miscompiles at -O3 on valid code
Date: Mon, 27 Aug 2018 14:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86927
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[8/9 Regression] Gcc |[8 Regression] Gcc
|miscompiles at -O3 on valid |miscompiles at -O3 on valid
|code |code
Known to fail|9.0 |
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-613884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:26:14 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/85758] questionable bitwise folding (missing single use check?)
Date: Mon, 27 Aug 2018 14:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85758
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-613885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:33:33 2018
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87114] New: [9 regression] ICE in gcc.c-torture/execute/builtins/strnlen.c starting with r263855
Date: Mon, 27 Aug 2018 14:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87114
Bug ID: 87114
Summary: [9 regression] ICE in
gcc.c-torture/execute/builtins/strnlen.c starting with
r263855
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
make -k check-gcc
RUNTESTFLAGS=builtins.exp=gcc.c-torture/execute/builtins/strnlen.c
# of expected passes 10
# of unexpected failures 3
FAIL: gcc.c-torture/execute/builtins/strnlen.c compilation, -O1 (internal
compiler error)
FAIL: gcc.c-torture/execute/builtins/strnlen.c compilation, -Os (internal
compiler error)
FAIL: gcc.c-torture/execute/builtins/strnlen.c compilation, -Og -g (internal
compiler error)
Looks like this is happening on multiple architectures.
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen-lib.c
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/lib/main.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -w -Og -g -fno-tree-loop-distribute-patterns
-fno-tracer -lm -o /home/seurer/gcc/build/gcc-test/gcc/testsuite/gcc/strnlen.x5
during RTL pass: expand
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:
In function 'test_strnlen_str_range':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:51:6:
internal compiler error: in fold_binary_loc, at fold-const.c:9334
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c:14:5:
note: in definition of macro 'A'
0x105cd74f fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/seurer/gcc/gcc-test/gcc/fold-const.c:9333
0x105d443f fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/seurer/gcc/gcc-test/gcc/fold-const.c:12360
0x103a75c3 expand_builtin_strnlen
/home/seurer/gcc/gcc-test/gcc/builtins.c:3023
0x103b49b7 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
/home/seurer/gcc/gcc-test/gcc/builtins.c:7331
0x1057e49f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/seurer/gcc/gcc-test/gcc/expr.c:10943
0x1058f05f store_expr(tree_node*, rtx_def*, int, bool, bool)
/home/seurer/gcc/gcc-test/gcc/expr.c:5636
0x10591653 expand_assignment(tree_node*, tree_node*, bool)
/home/seurer/gcc/gcc-test/gcc/expr.c:5420
0x103e4313 expand_call_stmt
/home/seurer/gcc/gcc-test/gcc/cfgexpand.c:2685
0x103e4313 expand_gimple_stmt_1
/home/seurer/gcc/gcc-test/gcc/cfgexpand.c:3575
0x103e4313 expand_gimple_stmt
/home/seurer/gcc/gcc-test/gcc/cfgexpand.c:3734
0x103eb527 expand_gimple_basic_block
/home/seurer/gcc/gcc-test/gcc/cfgexpand.c:5770
0x103ee647 execute
/home/seurer/gcc/gcc-test/gcc/cfgexpand.c:6373
>From gcc-bugs-return-613886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 14:47:56 2018
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Subject: [Bug middle-end/86554] [7/8/9 Regression] Incorrect code generation with signed/unsigned comparison
Date: Mon, 27 Aug 2018 14:47:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
So on trunk the remaining offender now is code hoisting. We still do
value-numbering the same but correctly do _not_ use the values definition to
simplify
the comparison:
Value numbering stmt = ret_13 = PHI <ret_11(3), ret_12(4)>
Setting value number of ret_13 to ret_12 (changed)
Making available beyond BB5 ret_13 for value ret_12
Value numbering stmt = printf ("ret is %d\n", ret_13);
Setting value number of .MEM_6 to .MEM_6 (changed)
Value numbering stmt = if (ret_13 <= 0)
Recording on edge 5->6 ret_13 le_expr 0 == true
Recording on edge 5->6 ret_13 gt_expr 0 == false
marking outgoing edge 5 -> 6 executable
marking outgoing edge 5 -> 7 executable
for code-hoisting both computations are antic-in in their respective
definition blocks and thus the value is hoisted choosing the computation
based on the expressions available in that block (the non-conversion
one since the unconverted unsigned expression isn't ANTIC_IN).
Note that a possible mitigation is to dumb down VN, not making this kind
of conversions value-number to the same value (but possibly only conversions
from signed to unsigned). OTOH the value-numbering itself isn't the issue
but rather how we compute ANTIC. That is, this looks like an inherent issue
of GVN-PRE.
We can, of course fix up inserts to use unsigned arithmetic but that has
impact on code quality in the majority of cases where no such false
equivalency is detected.
Need to think about this some more.
>From gcc-bugs-return-613887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 15:01:04 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87115] New: FAIL: gcc.dg/split-5.c execution test
Date: Mon, 27 Aug 2018 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87115
Bug ID: 87115
Summary: FAIL: gcc.dg/split-5.c execution test
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: wei3.xiao at intel dot com
Blocks: 81652
Target Milestone: ---
Target: x86-64
gcc.dg/split-5.c fails to run on CET machine:
[hjl@gnu-cet-1 gcc]$
/export/build/gnu/tools-build/gcc-cet-sdv-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-cet-sdv-x32/build-x86_64-linux/gcc/
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c
-fcf-protection -fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -pthread -fsplit-stack -Wl,-R,../.. -g
[hjl@gnu-cet-1 gcc]$ gdb a.out
GNU gdb (GDB) Fedora 8.1.1-3.fc28
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
BFD: warning:
/export/build/gnu/tools-build/gcc-cet-sdv-x32/build-x86_64-linux/gcc/testsuite/gcc/a.out:
unsupported GNU_PROPERTY_TYPE (5) type: 0xc0010001
Reading symbols from a.out...done.
(gdb) r
Starting program:
/export/build/gnu/tools-build/gcc-cet-sdv-x32/build-x86_64-linux/gcc/testsuite/gcc/a.out
BFD: warning: /lib64/ld-linux-x86-64.so.2: unsupported GNU_PROPERTY_TYPE (5)
type: 0xc0010001
BFD: warning: system-supplied DSO at 0x7ffef77d0000: unsupported
GNU_PROPERTY_TYPE (5) type: 0xc0010001
Missing separate debuginfos, use: dnf debuginfo-install
glibc-2.27-31.1.fc28.x86_64
BFD: warning: ../../libgcc_s.so.1: unsupported GNU_PROPERTY_TYPE (5) type:
0xc0010001
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffef75af700 (LWP 1473)]
Thread 2 "a.out" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffef75af700 (LWP 1473)]
0x0000000000401499 in swap (fu=0x405120 <c1>, fs=0x405500 <s1>,
tu=0x405560 <c2>, ts=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:40
40 __splitstack_getcontext (fs);
(gdb) bt
#0 0x0000000000401499 in swap (fu=0x405120 <c1>, fs=0x405500 <s1>,
tu=0x405560 <c2>, ts=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:40
#1 0x00000000004015a4 in down (i=985, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:64
#2 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#3 0x00000000004015de in down (i=986, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#4 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#5 0x00000000004015de in down (i=987, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#6 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#7 0x00000000004015de in down (i=988, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#8 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
---Type <return> to continue, or q <return> to quit---
#9 0x00000000004015de in down (i=989, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#10 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#11 0x00000000004015de in down (i=990, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#12 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#13 0x00000000004015de in down (i=991, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#14 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#15 0x00000000004015de in down (i=992, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#16 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#17 0x00000000004015de in down (i=993, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
---Type <return> to continue, or q <return> to quit---
#18 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#19 0x00000000004015de in down (i=994, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#20 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#21 0x00000000004015de in down (i=995, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#22 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#23 0x00000000004015de in down (i=996, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#24 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#25 0x00000000004015de in down (i=997, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#26 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#27 0x00000000004015de in down (i=998, msg=0x403004 "go1", me=0x405120 <c1>,
---Type <return> to continue, or q <return> to quit---
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#28 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#29 0x00000000004015de in down (i=999, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#30 0x0000000000402bd0 in __morestack ()
at /export/gnu/import/git/sources/gcc/libgcc/config/i386/morestack.S:546
#31 0x00000000004015de in down (i=1000, msg=0x403004 "go1", me=0x405120 <c1>,
mes=0x405500 <s1>, other=0x405560 <c2>, others=0x405940 <s2>)
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:65
#32 0x00000000004016dc in go1 ()
at /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/split-5.c:92
#33 0x00007ffef76011b8 in __push___start_context () from /lib64/libc.so.6
#34 0x0000000000000000 in ?? ()
(gdb)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81652
[Bug 81652] [meta-bug] -fcf-protection=full bugs
>From gcc-bugs-return-613888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 15:03:11 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/85805] [7/8/9 Regression] Wrong code for 64 bit comparisons on avr-gcc
Date: Mon, 27 Aug 2018 15:03:00 -0000
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It is fixed for 9 yes, and I am still pondering it for 8. I guess that's
not going to happen.
>From gcc-bugs-return-613889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 15:11:02 2018
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Subject: [Bug tree-optimization/86865] [9 Regression] Wrong code w/ -O2 -floop-parallelize-all -fstack-reuse=none -fwrapv -fno-tree-ch -fno-tree-dce -fno-tree-dominator-opts -fno-tree-loop-ivcanon
Date: Mon, 27 Aug 2018 15:11:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
We code-generate
<bb 2> [local count: 107374]:
xy = 0;
<bb 16> [local count: 107374]:
# graphite_IV.7_4 = PHI <0(2), graphite_IV.7_2(17)>
_21 = (int) graphite_IV.7_4;
_22 = ~_21;
sa = {};
...
<bb 25> [count: 0]:
xy = _22;
graphite_IV.7_2 = graphite_IV.7_4 + 1;
if (graphite_IV.7_4 < 1)
goto <bb 17>; [100.00%]
else
goto <bb 12>; [0.00%]
<bb 17> [count: 0]:
goto <bb 16>; [100.00%]
<bb 12> [count: 0]:
tb = 1;
return;
The issue is in the way we generate do-while style loops where we execute stmts
in the original latch too many times in this case.
The store to xy is originally in the latch of the not header copied loop
but not afterwards.
-fgraphite-identity is enough, no need to "parallelize".
>From gcc-bugs-return-613890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 15:54:25 2018
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Subject: [Bug c/39438] Can't compile a wrapper around strftime with -Werror=format-nonliteral
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Alexander Amelkin <groungccg at amelkin dot msk.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |groungccg at amelkin dot msk.ru
--- Comment #11 from Alexander Amelkin <groungccg at amelkin dot msk.ru> ---
I'm still seeing this with "gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0
20160609".
Is there any chance that this NINE YEAR OLD bug is going to be fixed?
>From gcc-bugs-return-613891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 16:09:59 2018
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From: "benjamin.kollenda at rub dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87116] New: Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
Date: Mon, 27 Aug 2018 16:09:00 -0000
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Bug ID: 87116
Summary: Incorrect result of
std::filesystem::path::lexically_normal() for more
than 3 dot-dot elements
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: benjamin.kollenda at rub dot de
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Created attachment 44611
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44611&action=edit
Example code with test inputs and expected outputs
Using std::filesystem::path::lexically_normal() with gcc 8.2.0 produces
incorrect results for paths with three or more dot-dot elements.
Example input:
comp0/comp1/comp2/comp3/../../../comp4/comp5/comp6/comp7
Expected output:
comp0/comp4/comp5/comp6/comp7
Actual output:
comp4/comp5/comp6/comp7
Using just 2 dot-dot elements works as expected:
Input:
comp0/comp1/comp2/comp3/../../comp4/comp5/comp6/comp7
Output:
comp0/comp1/comp4/comp5/comp6/comp7
This seems to be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82777
but not fixed already. The testcase given in that bugreport works correctly on
my system.
GCC version is 8.2.0 on Arch Linux 64bit.
Commandline: g++ -std=c++17 filesystem.cpp -lstdc++fs -Wall -Wextra -o
filesystem
I attached a file containing test inputs and expected outputs.
>From gcc-bugs-return-613892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 16:50:14 2018
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Subject: [Bug tree-optimization/57492] Optimize 2.0**i to ldexp(1.0,i)
Date: Mon, 27 Aug 2018 16:50:00 -0000
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The example from comment#2 should require -funsafe-math-optimizations
(it's not correct if the pow call overflowed / underflowed but the ldexp
call doesn't).
>From gcc-bugs-return-613893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 17:10:45 2018
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Subject: [Bug c++/87015] [8/9 Regression] miscompilation of template heavy Boost Spirit code
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--- Comment #5 from Daniel Starke <daniel.f.starke at freenet dot de> ---
I tried the version 8 branch snapshot from 2018-08-24 but the issue still
remains.
>From gcc-bugs-return-613895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 17:18:57 2018
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
*** Bug 87114 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-613894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 17:18:57 2018
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87114] [9 regression] ICE in gcc.c-torture/execute/builtins/strnlen.c starting with r263855
Date: Mon, 27 Aug 2018 17:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87114
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
dup
*** This bug has been marked as a duplicate of bug 87112 ***
>From gcc-bugs-return-613897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 18:12:29 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87117] New: [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Mon, 27 Aug 2018 18:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87117
Bug ID: 87117
Summary: [9 Regression] ICE in
eliminate_dom_walker::eliminate_cleanup(bool) at
gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Following ICEs:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/maxval_char_2.f90
-fsanitize=undefined -Ofast
during GIMPLE pass: cunrolli
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/maxval_char_2.f90:2:0:
2 | program main
|
internal compiler error: Segmentation fault
0xd4866f crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff69d810f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xee53f0 eliminate_dom_walker::eliminate_cleanup(bool)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5431
0xef575e do_rpo_vn
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6532
0xef58f7 do_rpo_vn(function*, edge_def*, bitmap_head*)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6551
0xe7ac48 tree_unroll_loops_completely
/home/marxin/Programming/gcc/gcc/tree-ssa-loop-ivcanon.c:1479
0xe7ae38 execute
/home/marxin/Programming/gcc/gcc/tree-ssa-loop-ivcanon.c:1655
or a bit different back-trace:
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c -O1
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c: In function ‘f’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:9:3: warning:
assignment of read-only location ‘"foo"[0]’
9 | "foo"[0] = 0; /* { dg-warning "assignment of read-only location" } */
| ^~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:10:3: warning:
increment of read-only location ‘"foo"[0]’
10 | "foo"[0]++; /* { dg-warning "increment of read-only location" } */
| ^~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:11:3: warning:
decrement of read-only location ‘"foo"[0]’
11 | "foo"[0]--; /* { dg-warning "decrement of read-only location" } */
| ^~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:12:3: warning:
increment of read-only location ‘"foo"[0]’
12 | ++"foo"[0]; /* { dg-warning "increment of read-only location" } */
| ^~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:13:3: warning:
decrement of read-only location ‘"foo"[0]’
13 | --"foo"[0]; /* { dg-warning "decrement of read-only location" } */
| ^~
during GIMPLE pass: fre
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lvalue-5.c:14:1: internal
compiler error: in vn_reference_insert, at tree-ssa-sccvn.c:2698
14 | }
| ^
0x6c2e4a vn_reference_insert
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:2698
0xe78f60 visit_reference_op_store
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:4066
0xe78f60 visit_stmt
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:4314
0xe7abcc process_bb
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5984
0xe7bb02 do_rpo_vn
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6405
0xe7ca8c execute
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6597
>From gcc-bugs-return-613896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 18:12:03 2018
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Subject: [Bug c/53769] [C11]: Macros __STDC_NO_THREADS__ / __STDC_NO_ATOMIC__ missing.
Date: Mon, 27 Aug 2018 18:12:00 -0000
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--- Comment #9 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Vincent Lefèvre from comment #8)
> (In reply to Florian Weimer from comment #7)
> > Furthermore, if I don't misread the standard, the expectation is that if an
> > implementation does not support threads, it still recognizes _Thread_local
> > and mostly ignores it,
>
> I suppose that the goal is to be able to compile multithread-aware programs
> on platforms that do not support threads. Since there is only one thread,
> thread storage duration is equivalent to static storage duration.
Exactly.
> > so that it is available even if __STDC_NO_THREADS__
> > is not defined. (Which is of course rather dodgy if you need to conform to
> > an existing ABI for thread-local variables, so I think the committee made a
> > mistake here.)
>
> The ABI is out of the scope of the standard, so that I don't see any issue
> here. The conformance to the existing ABI is something above the standard.
But we still have the issue for compilers targeting an ABI which has threads
and full thread-local support but which themselves do not support it. They
really should not treat _Thread_local as static storage duration because that
would either produce object files which fail to link, or silently corrupt
programs (which may even work most of the time).
>From gcc-bugs-return-613898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 18:13:49 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Mon, 27 Aug 2018 18:13:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-27
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
And one another:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr71168.c -O2
-fno-inline -fno-tree-dce
during GIMPLE pass: pre
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr71168.c: In
function ‘fn2’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr71168.c:15:6:
internal compiler error: in tree_to_shwi, at tree.c:6839
15 | void fn2()
| ^~~
0x6e2a95 tree_to_shwi(tree_node const*)
/home/marxin/Programming/gcc/gcc/tree.c:6839
0xe6b5c1 fully_constant_vn_reference_p(vn_reference_s*)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:1420
0xe7285a vn_reference_lookup_pieces(tree_node*, int, tree_node*,
vec<vn_reference_op_struct, va_heap, vl_ptr>, vn_reference_s**, vn_lookup_kind)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:2559
0xe4e4f2 phi_translate_1
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:1553
0xe4d86e phi_translate
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:1684
0xe4d996 phi_translate_set
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:1722
0xe50156 compute_antic_aux
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:2062
0xe50156 compute_antic
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:2408
0xe50156 execute
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:4213
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-613899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 18:37:00 2018
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Subject: [Bug c++/86993] [6/7/8/9 Regression] assignment of read-only variable error reported at wrong location
Date: Mon, 27 Aug 2018 18:37:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Aug 27 18:36:23 2018
New Revision: 263891
URL: https://gcc.gnu.org/viewcvs?rev=263891&root=gcc&view=rev
Log:
PR c++/86993
* cp-tree.h (cxx_readonly_error): Add location_t argument.
* typeck2.c (cxx_readonly_error): Add LOC argument, pass it to
ERROR_FOR_ASSIGNMENT macro and readonly_error. Add LOC argument
to ERROR_FOR_ASSIGNMENT macro, use error_at instead of error and
pass LOC to it. Formatting fixes.
* typeck.c (cp_build_unary_op): Pass location to cxx_readonly_error.
(cp_build_modify_expr): Pass loc to cxx_readonly_error.
* semantics.c (finish_asm_stmt): Pass input_location to
cxx_readonly_error.
* g++.dg/diagnostic/pr86993.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/diagnostic/pr86993.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/semantics.c
trunk/gcc/cp/typeck.c
trunk/gcc/cp/typeck2.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 19:51:14 2018
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Subject: [Bug c/87118] New: ICE in expand_expr_addr_expr_1, at expr.c:7862
Date: Mon, 27 Aug 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87118
Bug ID: 87118
Summary: ICE in expand_expr_addr_expr_1, at expr.c:7862
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c
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Reporter: gsocsameeran at gmail dot com
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Host: i686-linux-gnu
Target: i686-linux-gnu
Build: i686-pc-linux-gnu
Created attachment 44612
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44612&action=edit
.ii file attached
gcc version
---------------------------------------------------------------
swamimauli@swamimauli:~/upload/csmith/runtime/del$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/7/lto-wrapper
Target: i686-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.2.0-8ubuntu3.2' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=i686-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-targets=all --enable-multiarch --disable-werror --with-arch-32=i686
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu
--target=i686-linux-gnu
Thread model: posix
gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3.2)
swamimauli@swamimauli:~/upload/csmith/runtime/del$
compiling command
-----------------------------------------------
Below is command line:
OPTIONS :-fgnu-tm for transactional memory extension
swamimauli@swamimauli:~/upload/csmith/runtime/del$ gcc -fgnu-tm testcase.c
testcase.c: In function ‘func_9’:
testcase.c:471:139: warning: comparison of distinct pointer types lacks a cast
nc_14(func_18(p_11), ((safe_div_func_uint8_t_u_u(((g_406.f5 &= (l_538[0][1] >
((safe_sub_func_uint64_t_u_u(p_11, ((g_541 == ((*l_546) = g_545)) , (p_11 ,
(-3L))))) != (safe_div_func_uint8_t_u_u(((*l_558) =
((safe_add_func_int32_t_s_s((safe_lshift_func_uint8_t_u_u(((((safe_mul_func_uint8_t_u_u(((safe_lshift_func_uint8_t_u_s((((g_100.f4
|| 65531UL) , (-8L)) & p_11), 3)) < 0xC625L), l_557)) , 0xEF867843L) , l_557)
!= p_11), 6)), g_133[0][1].f5)) == 0x3EADAD52L)), l_538[0][1]))))) ==
g_212[0][4]), (**g_391))) , (void*)0), g_3);
^~
testcase.c: In function ‘func_14’:
testcase.c:618:468: warning: comparison of distinct pointer types lacks a cast
func_int16_t_s_s(6L, (1UL & l_703[7]))), g_531.f5)) <= 0x5EL), l_644)),
(*l_662))))) | 0x9C1A534825D755BFLL) , (*g_541)) != l_704[2][0][1]) ==
l_629)));
^~
testcase.c:685:260: warning: comparison of distinct pointer types lacks a cast
nt32_t_u_u(p_17, (-6L))))), ((g_751 != ((l_752 != (**p_15)) != (l_753 =
l_652[3]))) < (safe_div_func_uint16_t_u_u((l_756 != l_757), 0x0ABFL))))) !=
p_17));
^~
testcase.c: In function ‘func_33’:
testcase.c:859:139: internal compiler error: in expand_expr_addr_expr_1, at
expr.c:7862
(((((*l_126) = 4294967295UL) == (((((*l_128) = &g_102) != l_130) ,
((g_133[0][1] , l_134) != (p_36 != (void*)0))) > g_100.f3)) & ((void*)0 ==
l_135)) || 0xAC466B2A51B1567ELL) > g_56.f0);
~~~~~^~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
swamimauli@swamimauli:~/upload/csmith/runtime/del$
reduced file
-------------------------------------------------
REDUCED TESTCACE :
#include "csmith.h"
struct {
unsigned : 7;
unsigned a : 3
} b[][1];
c() {
__transaction_relaxed { safe_rshift_func_int16_t_s_u(0, b[0][1].a); }
}
backtrack report
--------------------------------------------------
This is the full backtrace of the ICE:
bug.c: In function ‘func_33’:
bug.c:857:139: internal compiler error: in exact_div, at poly-int.h:2139
0x89a47f poly_int<1u, poly_result<long, if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, poly_coeff_pair_traits<long,
if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type>::result_kind>::type>
exact_div<1u, long, int>(poly_int_pod<1u, long> const&, int)
../../gcc/gcc/poly-int.h:2139
0x89a47f expand_expr_addr_expr_1
../../gcc/gcc/expr.c:7977
0x88caa1 expand_expr_addr_expr
../../gcc/gcc/expr.c:8018
0x88caa1 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.c:11142
0x74ff69 expand_normal
../../gcc/gcc/expr.h:285
0x74ff69 precompute_register_parameters
../../gcc/gcc/calls.c:976
0x74ff69 expand_call(tree_node*, rtx_def*, int)
../../gcc/gcc/calls.c:4055
0x73e65d expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
../../gcc/gcc/builtins.c:8002
0x88eac3 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.c:10911
0x89acba store_expr(tree_node*, rtx_def*, int, bool, bool)
../../gcc/gcc/expr.c:5614
0x89c5bd expand_assignment(tree_node*, tree_node*, bool)
../../gcc/gcc/expr.c:5398
0x765e78 expand_call_stmt
../../gcc/gcc/cfgexpand.c:2685
0x765e78 expand_gimple_stmt_1
../../gcc/gcc/cfgexpand.c:3575
0x765e78 expand_gimple_stmt
../../gcc/gcc/cfgexpand.c:3734
0x767917 expand_gimple_basic_block
../../gcc/gcc/cfgexpand.c:5769
0x76d97e execute
../../gcc/gcc/cfgexpand.c:6372
>From gcc-bugs-return-613901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 20:14:12 2018
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Subject: [Bug middle-end/80283] [6/7/8/9 Regression] bad SIMD register allocation
Date: Mon, 27 Aug 2018 20:14:00 -0000
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--- Comment #25 from Michael_S <already5chosen at yahoo dot com> ---
Just a reminder 16 months later:
x86-64 case - both 8.2 and trunk are as bad as they were.
ARM-Neon case - 8.2 appears to be worse (by 5%) than either 6.x or 7.x. I
didn't check trunk.
>From gcc-bugs-return-613902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 20:18:09 2018
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87119] New: ice in set_value_range, at tree-vrp.c:289
Date: Mon, 27 Aug 2018 20:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87119
Bug ID: 87119
Summary: ice in set_value_range, at tree-vrp.c:289
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
The following C code:
enum { a = 1 } b;
unsigned long c;
d, e, f, g, h, i, j, k;
l() {
while (h)
while (i)
if (j)
return;
if (g && f && e && m() == a)
k = d && c && strncmp(&b, "", c - 1);
}
when compiled by recent gcc trunk and compiler flag -O2, does this:
/home/dcb/gcc/results.263799.asan/bin/gcc
/home/dcb/gcc/results.263849/bin/gcc
during RTL pass: expand
bug461.c: In function ‘l’:
bug461.c:10:19: internal compiler error: in set_value_range, at tree-vrp.c:289
10 | k = d && c && strncmp(&b, "", c - 1);
| ^~~~~~~~~~~~~~~~~~~~~~
0x116adfe set_value_range(value_range*, value_range_type, tree_node*,
tree_node*
, bitmap_head*)
../../trunk/gcc/tree-vrp.c:289
0x1175cff extract_range_from_binary_expr_1(value_range*, tree_code, tree_node*,
value_range*, value_range*)
../../trunk/gcc/tree-vrp.c:1568
0x1177924 determine_value_range_1
../../trunk/gcc/tree-vrp.c:6765
0x1177aff determine_value_range(tree_node*,
generic_wide_int<wide_int_storage>*,
generic_wide_int<wide_int_storage>*)
../../trunk/gcc/tree-vrp.c:6800
The problem seems to exist from 263799 to 263849.
>From gcc-bugs-return-613903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 20:37:41 2018
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Subject: [Bug tree-optimization/86010] [7/8/9 Regression] redundant memset with smaller size not eliminated
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
I believe the fix is behind the regression reported in pr87011.
>From gcc-bugs-return-613904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 20:50:11 2018
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |msebor at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
expand_builtin_strnlen() creates a MIN_EXPR with operands of mixed types which
then trips the assertion newly added to fold_binary_loc() to detect these
mismatches.
>From gcc-bugs-return-613905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 22:58:28 2018
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01709.html
>From gcc-bugs-return-613906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 27 23:03:03 2018
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Subject: [Bug libstdc++/87116] Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Ever confirmed|0 |1
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Subject: [Bug libstdc++/87116] Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The problem is in this step of the normalisation algorithm:
- As long as any appear, remove a non-dot-dot filename immediately followed
by a directory-separator and a dot-dot filename, along with any immediately
following directory-separator.
The second time I do that, I leave a trailing slash in the native format
string, but not in the vector of path components. The third time then removes
two components not one.
Shouldn't be too hard to fix.
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From: "vz-gcc at zeitlins dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87120] New: gcc incorrectly accepts uniform-initializing bool values from double
Date: Mon, 27 Aug 2018 23:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87120
Bug ID: 87120
Summary: gcc incorrectly accepts uniform-initializing bool
values from double
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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gcc 8.2.0 incorrectly (AFAICS) compiles the following program:
% cat -n init.cpp
1 double foo() { return 17.0; }
2
3 int main()
4 {
5 bool b{foo()};
6 return b;
7 }
% g++ -std=c++17 -Wall init.cpp
% g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-4)
Compare this with clang:
% clang++-7 -std=c++17 -Wall init.cpp && ./a.out
init.cpp:5:12: error: type 'double' cannot be narrowed to 'bool' in initializer
list [-Wc++11-narrowing]
bool b{foo()};
^~~~~
init.cpp:5:12: note: insert an explicit cast to silence this issue
bool b{foo()};
^~~~~
static_cast<bool>( )
1 error generated.
or MSVS 2017.7:
% cl /W4 init.cpp
init.cpp
init.cpp(5): error C2397: conversion from 'double' to 'bool' requires a
narrowing conversion
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Subject: [Bug c++/63392] poor error recovery with missing typename
Date: Mon, 27 Aug 2018 23:33:00 -0000
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Mon Aug 27 23:33:02 2018
New Revision: 263899
URL: https://gcc.gnu.org/viewcvs?rev=263899&root=gcc&view=rev
Log:
C++: fix-it hint for missing "typename" (PR c++/63392)
This patch adds a fix-it hint to missing "typename" errors in the C++
frontend, suggesting the insertion of "typename ".
This addresses part of PR c++/63392; however it does not improve the
error-recovery for such cases.
gcc/cp/ChangeLog:
PR c++/63392
* parser.c (cp_parser_diagnose_invalid_type_name): Add fix-it
hint.
gcc/testsuite/ChangeLog:
PR c++/63392
* g++.dg/diagnostic/missing-typename.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/diagnostic/missing-typename.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed in r263900.
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Subject: [Bug tree-optimization/87112] [9 Regression] ICE in fold_binary_loc, at fold-const.c:9334
Date: Tue, 28 Aug 2018 00:11:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Aug 28 00:10:46 2018
New Revision: 263900
URL: https://gcc.gnu.org/viewcvs?rev=263900&root=gcc&view=rev
Log:
PR tree-optimization/87112 - ICE in fold_binary_loc on strnlen of mixed integer
types
gcc/ChangeLog:
PR tree-optimization/87112
* builtins.c (expand_builtin_strnlen): Convert c_strlen result to
the type of the bound argument.
gcc/testsuite/ChangeLog:
PR tree-optimization/87112
* gcc.dg/pr87112.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87112.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86914] [8/9 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
Date: Tue, 28 Aug 2018 00:26:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Aug 28 00:25:50 2018
New Revision: 263905
URL: https://gcc.gnu.org/viewcvs?rev=263905&root=gcc&view=rev
Log:
PR tree-optimization/86914 - wrong code with strlen() of poor-man's flexible
array member plus offset
gcc/ChangeLog:
PR tree-optimization/86914
* tree-ssa-strlen.c (maybe_set_strlen_range): Avoid MEM_REF.
gcc/testsuite/ChangeLog:
PR tree-optimization/86914
* gcc.dg/strlenopt-57.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/strlenopt-57.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
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Subject: [Bug tree-optimization/86914] [8 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] -O2 |[8 Regression] -O2
|generates wrong code with |generates wrong code with
|strlen() of pointers within |strlen() of pointers within
|one-element arrays of |one-element arrays of
|structures |structures
Known to fail|9.0 |
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed to trunk in r263905.
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Subject: [Bug c++/87109] Wrong overload picked with ref-qualifiers
Date: Tue, 28 Aug 2018 02:42:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-28
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I've been looking into this.
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Ah, I think this is something I already fixed today after seeing a kernel build
fail. I'll verify, potentially adding this test to the regression suite.
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--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
It's different, but related.
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--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Aug 28 04:02:11 2018
New Revision: 263906
URL: https://gcc.gnu.org/viewcvs?rev=263906&root=gcc&view=rev
Log:
PR tree-optimization/87110
* tree-ssa-dse.c (compute_trims): Handle non-constant
TYPE_SIZE_UNIT.
PR tree-optimization/87110
* gcc.c-torture/compile/pr87110.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr87110.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dse.c
>From gcc-bugs-return-613918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 04:05:25 2018
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk.
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Subject: [Bug c++/87121] New: wrong 128-bit integer multiplication with mixed bit size
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Bug ID: 87121
Summary: wrong 128-bit integer multiplication with mixed bit
size
Product: gcc
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Created attachment 44613
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44613&action=edit
repro source
Ubuntu 18.04.1
Linux x2 4.15.0-32-generic #35-Ubuntu SMP Fri Aug 10 17:58:07 UTC 2018 x86_64
x86_64 x86_64 GNU/Linux
On g++7 and g++8:
g++ (Ubuntu 7.3.0-16ubuntu3) 7.3.0
g++-8 (Ubuntu 8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk
revision 259383]
In some special context which seems to include as relevant:
- an include of <cmath>
- using namespace std;
the integer multiplication 128-bit times 64-bit produces incorrect result.
See attached small repro case.
Expected output (see attached source): all 1.
Observed output:
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
>From gcc-bugs-return-613920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 04:45:48 2018
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Subject: [Bug c++/87121] wrong 128-bit integer multiplication with mixed bit size
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |c++
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This sounds like std::pow is being used instead of the ::pow you have created.
I suspect this is not a bug. std::pow is the floating point version.
>From gcc-bugs-return-613921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 04:49:32 2018
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Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Tue, 28 Aug 2018 04:49:00 -0000
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--- Comment #12 from martin <mscfd at gmx dot net> ---
The workaround mentioned by Paul in comment #9 is working only partially. For
character sequences (and possibly other data types), valgrind still complains.
Surprisingly, using a single character works as well. On the other with three
or more characters, valgrind sees one more invalid read than with two
characters. The workaround for me was to switch to a string derived-type, which
encapsulates the character variable. Then I only see memory leaks, but no
invalid reads, or other serious stuff.
Here is the variation which still shows the problems with a character constant:
program classstar_alloc3
type :: t
class(*), allocatable :: val
end type
type :: list
type(t), dimension(:), pointer :: ll
end type
integer :: i
type(list) :: a
allocate(a%ll(1:2))
do i = 1,2
allocate(a%ll(i)%val, source='01')
end do
call rrr(a)
contains
subroutine rrr(a)
type(list), intent(in) :: a
class(*), allocatable :: c
! allocate(c, source=a%ll(2)%val)
c = a%ll(2)%val
end subroutine
end program classstar_alloc3
>From gcc-bugs-return-613922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 04:51:34 2018
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Subject: [Bug c++/87121] wrong 128-bit integer multiplication with mixed bit size
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--- Comment #2 from Mihai Preda <mpreda at gmail dot com> ---
OK my bad.
I don't understand exactly why the <cmath> or the std:: pow() version is
preferred, but this seems to be what's happening, and explains the behavior.
Feel free to close this.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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David Binderman <dcb314 at hotmail dot com> changed:
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----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
I also see this on ubsan bootstrap of revisino 263900.
>From gcc-bugs-return-613924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:02:09 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87119] [9 Regression] ice in set_value_range, at tree-vrp.c:289
Date: Tue, 28 Aug 2018 07:02:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 87059 ***
>From gcc-bugs-return-613925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:02:10 2018
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Subject: [Bug tree-optimization/87059] [9 Regression] internal compiler error: in set_value_range, at tree-vrp.c:289
Date: Tue, 28 Aug 2018 07:02:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #24 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 87119 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-613926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:08:59 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87118] ICE in expand_expr_addr_expr_1, at expr.c:7862
Date: Tue, 28 Aug 2018 07:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-28
CC| |aldyh at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Host|i686-linux-gnu |i686-linux-gnu,
| |x86_64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's very old ICE (4.8.0+).
Cleaned up test-case:
$ cat pr87118-2.c
struct {
unsigned a: 7;
unsigned b : 3;
} b;
void d() {}
void c() {
__transaction_relaxed { d(b.b); }
}
>From gcc-bugs-return-613927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:18:39 2018
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Subject: [Bug c++/87121] wrong 128-bit integer multiplication with mixed bit size
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
>From gcc-bugs-return-613928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:19:47 2018
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Tue, 28 Aug 2018 07:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine (obviously).
>From gcc-bugs-return-613929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:25:50 2018
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
One another different back-trace, maybe helpful:
$ cat load.i
void e();
void a(int c, char **d) {
char b;
if (1 < c)
b = d[0];
if (1 < c && b)
e();
while (1 < c)
;
}
$ gcc load.i -fcode-hoisting -O1
load.i: In function ‘a’:
load.i:6:7: warning: assignment to ‘char’ from ‘char *’ makes integer from
pointer without a cast [-Wint-conversion]
6 | b = d[0];
| ^
during GIMPLE pass: pre
load.i:3:6: internal compiler error: in duplicate_ssa_name_ptr_info, at
tree-ssanames.c:715
3 | void a(int c, char **d) {
| ^
0xed051a duplicate_ssa_name_ptr_info(tree_node*, ptr_info_def*)
/home/marxin/Programming/gcc/gcc/tree-ssanames.c:715
0xe742cc eliminate_dom_walker::eliminate_stmt(basic_block_def*,
gimple_stmt_iterator*)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:4852
0xe746b7 eliminate_dom_walker::before_dom_children(basic_block_def*)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5341
0x14734d7 dom_walker::walk(basic_block_def*)
/home/marxin/Programming/gcc/gcc/domwalk.c:353
0xe6c76a eliminate_with_rpo_vn(bitmap_head*)
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5519
0xe4fa4e execute
/home/marxin/Programming/gcc/gcc/tree-ssa-pre.c:4232
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-613930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 07:49:58 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
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--- Comment #10 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to Jonathan Wakely from comment #9)
> You're still doing it wrong.
>
> As I already said, to include a file you should be using -include not
> -Xpreprocessor.
>
> Stop using the -Xpreprocessor option to name a file for inclusion, that's
> not what it does.
I tried the -include filename option and it didn't seem to work:
===============================================================:
C:\parser>cls
C:\parser>win_flex --c++ --outfile=lex1.yy.cc flex1.l
'win_flex' is not recognized as an internal or external command,
operable program or batch file.
C:\parser>echo "1) *********************************************"
"1) *********************************************"
C:\parser>echo "2) *********************************************"
"2) *********************************************"
C:\parser>g++ -include iostream.h -Xpreprocessor "FlexLexer.h" lex1.yy.cc
FlexLexer.h:64:21: error: 'yy_create_buffer' declared as a 'virtual' field
yy_create_buffer( istream* s, int size ) = 0;
^~~~~~~
FlexLexer.h:64:3: error: expected ';' at end of member declaration
yy_create_buffer( istream* s, int size ) = 0;
^~~~~~~~~~~~~~~~
FlexLexer.h:64:28: error: expected ')' before '*' token
yy_create_buffer( istream* s, int size ) = 0;
^
FlexLexer.h:66:26: error: 'istream' has not been declared
virtual void yyrestart( istream* s ) = 0;
^~~~~~~
FlexLexer.h:71:13: error: 'istream' has not been declared
int yylex( istream* new_in, ostream* new_out = 0 )
^~~~~~~
FlexLexer.h:71:30: error: 'ostream' has not been declared
int yylex( istream* new_in, ostream* new_out = 0 )
^~~~~~~
FlexLexer.h:79:31: error: 'istream' has not been declared
virtual void switch_streams( istream* new_in = 0,
FlexLexer.h:80:6: error: 'ostream' has not been declared
ostream* new_out = 0 ) = 0;
^~~~~~~
FlexLexer.h:107:22: error: expected ')' before '*' token
yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 );
FlexLexer.h:112:26: error: expected ';' at end of member declaration
struct yy_buffer_state* yy_create_buffer( istream* s, int size );
FlexLexer.h:112:51: error: expected ')' before '*' token
struct yy_buffer_state* yy_create_buffer( istream* s, int size );
FlexLexer.h:114:18: error: 'istream' has not been declared
void yyrestart( istream* s );
FlexLexer.h:117:31: error: 'istream' has not been declared
virtual void switch_streams( istream* new_in, ostream* new_out );
^~~~~~~
FlexLexer.h:117:48: error: 'ostream' has not been declared
virtual void switch_streams( istream* new_in, ostream* new_out );
^~~~~~~
FlexLexer.h:128:50: error: 'istream' has not been declared
void yy_init_buffer( struct yy_buffer_state* b, istream* s );
^~~~~~~
FlexLexer.h:143:2: error: 'istream' does not name a type
istream* yyin; // input source for default LexerInput
^~~~~~~
FlexLexer.h:144:2: error: 'ostream' does not name a type
ostream* yyout; // output sink for default LexerOutput
^~~~~~~
In file included from <command-line>:31:0:
./iostream.h:1:0: fatal error: inter-module optimizations not implemented for
C++
#include <iostream>
compilation terminated.
C:\parser>echo "3) *********************************************"
"3) *********************************************"
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From: "miltonkbenjamin at verizon dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
Date: Tue, 28 Aug 2018 07:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87088
--- Comment #11 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to miltonkbenjamin from comment #10)
> (In reply to Jonathan Wakely from comment #9)
> > You're still doing it wrong.
> >
> > As I already said, to include a file you should be using -include not
> > -Xpreprocessor.
> >
> > Stop using the -Xpreprocessor option to name a file for inclusion, that's
> > not what it does.
Johnathan,
> I tried the -include filename option and it didn't seem to work:
> ===============================================================:
> C:\parser>cls
> C:\parser>win_flex --c++ --outfile=lex1.yy.cc flex1.l
> 'win_flex' is not recognized as an internal or external command,
> operable program or batch file.
> C:\parser>echo "1) *********************************************"
> "1) *********************************************"
> C:\parser>echo "2) *********************************************"
> "2) *********************************************"
>
> C:\parser>g++ -include iostream.h -Xpreprocessor "FlexLexer.h" lex1.yy.cc
> FlexLexer.h:64:21: error: 'yy_create_buffer' declared as a 'virtual' field
> yy_create_buffer( istream* s, int size ) = 0;
> ^~~~~~~
> FlexLexer.h:64:3: error: expected ';' at end of member declaration
> yy_create_buffer( istream* s, int size ) = 0;
> ^~~~~~~~~~~~~~~~
> FlexLexer.h:64:28: error: expected ')' before '*' token
> yy_create_buffer( istream* s, int size ) = 0;
> ^
> FlexLexer.h:66:26: error: 'istream' has not been declared
> virtual void yyrestart( istream* s ) = 0;
> ^~~~~~~
> FlexLexer.h:71:13: error: 'istream' has not been declared
> int yylex( istream* new_in, ostream* new_out = 0 )
> ^~~~~~~
> FlexLexer.h:71:30: error: 'ostream' has not been declared
> int yylex( istream* new_in, ostream* new_out = 0 )
> ^~~~~~~
> FlexLexer.h:79:31: error: 'istream' has not been declared
> virtual void switch_streams( istream* new_in = 0,
> FlexLexer.h:80:6: error: 'ostream' has not been declared
> ostream* new_out = 0 ) = 0;
> ^~~~~~~
> FlexLexer.h:107:22: error: expected ')' before '*' token
> yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 );
> FlexLexer.h:112:26: error: expected ';' at end of member declaration
> struct yy_buffer_state* yy_create_buffer( istream* s, int size );
> FlexLexer.h:112:51: error: expected ')' before '*' token
> struct yy_buffer_state* yy_create_buffer( istream* s, int size );
> FlexLexer.h:114:18: error: 'istream' has not been declared
> void yyrestart( istream* s );
> FlexLexer.h:117:31: error: 'istream' has not been declared
> virtual void switch_streams( istream* new_in, ostream* new_out );
> ^~~~~~~
> FlexLexer.h:117:48: error: 'ostream' has not been declared
> virtual void switch_streams( istream* new_in, ostream* new_out );
> ^~~~~~~
> FlexLexer.h:128:50: error: 'istream' has not been declared
> void yy_init_buffer( struct yy_buffer_state* b, istream* s );
> ^~~~~~~
> FlexLexer.h:143:2: error: 'istream' does not name a type
> istream* yyin; // input source for default LexerInput
> ^~~~~~~
> FlexLexer.h:144:2: error: 'ostream' does not name a type
> ostream* yyout; // output sink for default LexerOutput
> ^~~~~~~
> In file included from <command-line>:31:0:
> ./iostream.h:1:0: fatal error: inter-module optimizations not implemented
> for C++
> #include <iostream>
> compilation terminated.
> C:\parser>echo "3) *********************************************"
> "3) *********************************************"
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Tue, 28 Aug 2018 08:03:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing patches for comment#1 and 2nd issue of description.
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Subject: [Bug target/54412] minimal 32-byte stack alignment with -mavx on 64-bit Windows
Date: Tue, 28 Aug 2018 08:09:00 -0000
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--- Comment #22 from Royi <royiavital at yahoo dot com> ---
Hello,
Any progress on this on GCC 8.x?
We really want GCC + AVX on Windows.
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Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.3
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Subject: [Bug c++/87122] New: [8/9 Regression] ICE in tsubst_decomp_names
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Bug ID: 87122
Summary: [8/9 Regression] ICE in tsubst_decomp_names
Product: gcc
Version: 9.0
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Starting with r256795 gcc ICEs on:
struct S { int a, b; };
template <bool>
void
foo ()
{
S x[2];
auto f = [](auto & y) { for (auto & [ u, v ] : y) ; };
f (x);
}
int
main ()
{
foo<true> ();
}
with -std=c++17, previously it has been incorrectly rejected.
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Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P2
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Subject: [Bug target/86753] [9 Regression] gcc.target/aarch64/sve/vcond_[45].c fail after recent combine patch
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huangzao <zao.huang at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zao.huang at intel dot com
--- Comment #3 from huangzao <zao.huang at intel dot com> ---
r263067 also causes failures of gcc.target/i386/avx-cvt-2.c on haswell.
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to miltonkbenjamin from comment #11)
> > C:\parser>g++ -include iostream.h -Xpreprocessor "FlexLexer.h" lex1.yy.cc
You're STILL passing a filename as the argument to -Xpreprocessor.
What part of my comments do you not understand?
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Subject: [Bug c++/87121] wrong 128-bit integer multiplication with mixed bit size
Date: Tue, 28 Aug 2018 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87121
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
<cmath> declares a std::pow function template that accepts integer types:
template<typename _Tp, typename _Up>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
pow(_Tp __x, _Up __y)
{
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return pow(__type(__x), __type(__y));
}
Since you're calling pow with two arguments of type 'int' the specialization
std::pow<int, int> is a perfect match, but ::pow(u64, int) is not (because
'u64' is not the same type as 'int').
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Subject: [Bug c++/65043] Expected narrowing conversion during list initialization of bool from double
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |vz-gcc at zeitlins dot org
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 87120 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/87120] gcc incorrectly accepts uniform-initializing bool values from double
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was recently fixed on trunk.
*** This bug has been marked as a duplicate of bug 65043 ***
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Tue, 28 Aug 2018 09:33:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug 28 09:33:16 2018
New Revision: 263908
URL: https://gcc.gnu.org/viewcvs?rev=263908&root=gcc&view=rev
Log:
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-operands.c (add_stmt_operand): STRING_CST may
get virtual operands.
(get_expr_operands): Handle STRING_CST like other decls.
* gcc.dg/lvalue-5.c: New testcase.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/lvalue-5.c
trunk/gcc/tree-ssa-operands.c
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Subject: [Bug testsuite/87078] [9 regression] gcc.dg/vect/slp-37.c begins failing with r263772
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>From gcc-bugs-return-613944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:08:50 2018
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Subject: [Bug c++/87120] gcc incorrectly accepts uniform-initializing bool values from double
Date: Tue, 28 Aug 2018 10:08:00 -0000
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--- Comment #2 from Vadim Zeitlin <vz-gcc at zeitlins dot org> ---
Thanks and sorry for a duplicate!
In my defence -- and just in case there is some problem that could be fixed
here -- Bugzilla search seems to be broken: I had searched for "double narrow
bool" (without quotes) and even just "narrow bool" before opening the bug, but
it hadn't found anything and definitely not the bug 65043.
>From gcc-bugs-return-613945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:09:19 2018
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Subject: [Bug c/87123] New: incorrect optimization involving INT_MIN and conditional operator
Date: Tue, 28 Aug 2018 10:09:00 -0000
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Bug ID: 87123
Summary: incorrect optimization involving INT_MIN and
conditional operator
Product: gcc
Version: 7.3.0
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Reproduced using gcc 5.4.0 on Ubuntu 16.04, gcc 7.3.0 on Cygwin64, and also a
gcc 7.2.1 for ARM:
$ cat test.c
#include <stdio.h>
int x = 0x80000000;
int main(void)
{
unsigned y = (unsigned)(x < 0 ? -x : x) >> 8;
if (y == 0x800000)
printf("Test passed\n");
else
printf("Test failed: y = %#x, expected 0x800000\n", y);
}
$ gcc -O2 test.c
$ ./a.out
Test failed: y = 0x800000, expected 0x800000
Looking at the generated assembly, the "Test passed" path has been optimized
out. The test passes below -O2, or if "(x < 0 ? -x : x)" is replaced with just
"-x".
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Subject: [Bug c++/87120] gcc incorrectly accepts uniform-initializing bool values from double
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The search defaults to open bugs. Bug 65043 is in RESOLVED state, so won't show
up unless you include closed bugs in the results.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug 28 10:13:18 2018
New Revision: 263910
URL: https://gcc.gnu.org/viewcvs?rev=263910&root=gcc&view=rev
Log:
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-pre.c (compute_avail): Do not make expressions
with predicated values available.
(get_expr_value_id): Assert we do not run into predicated value
expressions.
* gcc.dg/pr87117-2.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr87117-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
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Subject: [Bug c/87123] incorrect optimization involving INT_MIN and conditional operator
Date: Tue, 28 Aug 2018 10:14:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The result of -x cannot be represented when x==INT_MIN, it overflows which is
undefined behaviour.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed all four issues. Didn't check ubsan bootstrap.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug 28 10:15:54 2018
New Revision: 263912
URL: https://gcc.gnu.org/viewcvs?rev=263912&root=gcc&view=rev
Log:
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-sccvn.c (eliminate_dom_walker::eliminate_cleanup):
Handle removed stmt without LHS (GIMPLE_NOP).
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed all four issues. Didn't check ubsan bootstrap.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug 28 10:14:45 2018
New Revision: 263911
URL: https://gcc.gnu.org/viewcvs?rev=263911&root=gcc&view=rev
Log:
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Exclude
void which is is_gimple_reg_type by checking for COMPLETE_TYPE_P.
* gcc.dg/pr87117-1.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr87117-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug c/87123] incorrect optimization involving INT_MIN and conditional operator
Date: Tue, 28 Aug 2018 10:17:00 -0000
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--- Comment #2 from Andy Koppe <andy.koppe at analog dot com> ---
You are right. The test passes when casting to unsigned before negation.
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Subject: [Bug c/87123] incorrect optimization involving INT_MIN and conditional operator
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Use -fsanitize=undefined to diagnose the undefined behaviour at runtime, or use
-fwrapv to make the negation well-defined (both options are suggested by
https://gcc.gnu.org/bus/ which you were asked to read before creating a new bug
report).
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Subject: [Bug c/87123] incorrect optimization involving INT_MIN and conditional operator
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> Use -fsanitize=undefined to diagnose the undefined behaviour at runtime, or
> use -fwrapv to make the negation well-defined (both options are suggested by
> https://gcc.gnu.org/bus/ which you were asked to read before creating a new
> bug report).
Oops, that should be https://gcc.gnu.org/bugs/
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Subject: [Bug c/87123] incorrect optimization involving INT_MIN and conditional operator
Date: Tue, 28 Aug 2018 10:30:00 -0000
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--- Comment #6 from Andy Koppe <andy.koppe at analog dot com> ---
Thanks, consider me duly embarrased.
>From gcc-bugs-return-613958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:35:30 2018
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Subject: [Bug c++/86546] ICE on invalid: tree_class_check_failed()
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-613960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:43:59 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
Date: Tue, 28 Aug 2018 10:43:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-28
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44614
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44614&action=edit
gcc9-pr87122.patch
Untested fix.
>From gcc-bugs-return-613959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:43:07 2018
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87078] [9 regression] gcc.dg/vect/slp-37.c begins failing with r263772
Date: Tue, 28 Aug 2018 10:43:00 -0000
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--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue Aug 28 10:42:30 2018
New Revision: 263913
URL: https://gcc.gnu.org/viewcvs?rev=263913&root=gcc&view=rev
Log:
Add target selectors to slp-37.c (PR87078)
This test was failing for Power 7 due to the lack of hw support
for unaligned accesses.
2018-08-28 Richard Sandiford <richard.sandiford@arm.com>
gcc/testsuite/
PR testsuite/87078
* gcc.dg/vect/slp-37.c: Restrict scan tests to vect_hw_misalign.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/slp-37.c
>From gcc-bugs-return-613961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 10:58:14 2018
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Tue, 28 Aug 2018 10:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|FIXED |---
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
One more:
$ gfortran /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr85082.f90
-O1
during GIMPLE pass: fre
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr85082.f90:14:0:
14 | end
|
internal compiler error: in set_ssa_val_to, at tree-ssa-sccvn.c:3620
0x6c1755 set_ssa_val_to
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:3617
0xef14aa visit_phi
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:4208
0xef1adf visit_stmt
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:4251
0xef3733 process_bb
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5893
0xef4be2 do_rpo_vn
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6403
0xef5b6c execute
/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:6595
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87124] New: [9 Regression] ICE have integer_cst in SSA_VAL, at tree-ssa-sccvn.c:462 while building 541.leela_r from SPEC2017
Date: Tue, 28 Aug 2018 10:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87124
Bug ID: 87124
Summary: [9 Regression] ICE have integer_cst in SSA_VAL, at
tree-ssa-sccvn.c:462 while building 541.leela_r from
SPEC2017
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: tree-optimization
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Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
class A {
int m_fn1();
};
int A::m_fn1() {
A *a = this;
for (int i; i && a;)
a = 0;
}
ICEs on aarch64 with -O2
SGFTree.ii:8:1: internal compiler error: tree check: expected ssa_name, have
integer_cst in SSA_VAL, at tree-ssa-sccvn.c:462
0x62d6e5 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
$SRC/gcc/tree.c:9371
0x1018d87 tree_check(tree_node*, char const*, int, char const*, tree_code)
$SRC/gcc/tree.h:3106
0x1018d87 SSA_VAL(tree_node*)
$SRC/gcc/tree-ssa-sccvn.c:462
0x100592b rpo_elim::eliminate_avail(basic_block_def*, tree_node*)
$SRC/gcc/tree-ssa-sccvn.c:5690
0x1009db5 vn_lookup_simplify_result
$SRC/gcc/tree-ssa-sccvn.c:5673
0xb5ec75 gimple_fold_stmt_to_constant_1(gimple*, tree_node* (*)(tree_node*),
tree_node* (*)(tree_node*))
$SRC/gcc/gimple-fold.c:6098
0x1013c83 try_to_simplify
$SRC/gcc/tree-ssa-sccvn.c:4225
0x1013c83 visit_stmt
$SRC/gcc/tree-ssa-sccvn.c:4268
0x10157fb process_bb
$SRC/gcc/tree-ssa-sccvn.c:5984
0x1017466 do_rpo_vn
$SRC/gcc/tree-ssa-sccvn.c:6408
0x101833c execute
$SRC/gcc/tree-ssa-sccvn.c:6597
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
This is reduced from 541.leela_r from SPEC2017.
Apologies is this is a duplicate of recently fixed sscvn bugs, I couldn't find
an exact duplicate of the backtrace
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87125] New: [9 Regression] ICE in tsubst_copy starting with r261084
Date: Tue, 28 Aug 2018 11:02:00 -0000
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Bug ID: 87125
Summary: [9 Regression] ICE in tsubst_copy starting with
r261084
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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The following testcase ICEs with -std=c++17 starting with r261084 in
tsubst_copy:
typedef unsigned a;
template <typename b, b c> struct d {
static constexpr b e = c;
typedef d f;
constexpr operator int() { return e; }
};
typedef d<bool, true> g;
template <typename...> struct h;
template <typename i, typename j> struct h<i, j> : j {};
template <typename b> struct k { typedef b f; };
struct l : d<bool, false> {};
template <typename> struct ab : d<bool, false> {};
template <typename> auto aa() -> decltype(0);
template <typename> struct m;
struct n : g {};
template <typename> struct o { typedef int f; };
template <typename> struct v { typedef int f; };
template <bool, typename> struct p;
template <typename b> struct p<true, b> { typedef b f; };
template <typename> class s;
struct q;
template <typename b, typename> struct ac : k<b> {};
template <bool, bool, typename...> struct ad;
struct ae {
template <typename af, typename... ag>
static ac<decltype(af()(aa<ag>...)), q> ah(int);
};
template <typename ai, typename... aj> struct ad<false, false, ai, aj...> : ae
{
typedef decltype(ah<ai, aj...>(0)) f;
};
template <typename ai, typename... aj>
struct ak : ad<l::e, ab<typename v<ai>::f>::e, ai, aj...>::f {};
template <typename ai, typename... aj> struct s<ai(aj...)> : ak<ai, aj...> {};
template <typename...> class al;
template <typename b, b> struct am;
int an, ct, dc;
template <typename> class ao {};
template <typename> struct ap;
template <typename ai, typename... aq> struct ap<ai(aq...)> {
template <typename ar, typename> using as = decltype(ao<typename
o<ar>::f>());
template <typename af, typename, typename... at>
using au = typename s<af(as<at, a>...)>::f;
template <typename> using av = au<ai, a, aq...>;
template <typename ag, typename aw = av<al<>>> aw operator()(ag);
};
template <typename> using ax = h<d<bool, false>, d<bool, __is_enum(int)>>;
template <int, typename ay, typename... az> struct ba {
typedef ap<ay(az...)> f;
};
template <typename ay, typename... az>
typename ba<ax<ay>::e, ay, az...>::f bb(ay, az...);
template <typename> struct bc;
template <typename bd> using be = typename bd::f;
enum bf { bg };
constexpr bf bh(a, a) { return bg; }
template <a, typename bi, bf> struct bk { using f = bi; };
template <long... bl> using bn = am<unsigned long, bl...>;
template <a bm> using bo = be<bk<bm, bn<0>, bh(1, bm)>>;
template <typename bd> struct bp { using f = bd; };
template <template <typename> class bq, typename... br,
template <typename> class bs = bq>
bp<bs<br...>> r(int);
template <template <typename> class bq> using bt = decltype(r<bq>(0));
template <template <typename> class bq, typename...> struct bj : bt<bq> {};
struct bu {
template <class...> using bv = g;
};
template <bool...> using dd = n;
template <typename...> using bw = dd<>;
template <typename... bx> using t = be<bj<bu::bv, bx...>>;
template <typename> struct w;
template <typename> using u = int;
namespace z {
template <typename> struct bz;
}
using z::bz;
template <typename...> struct ca : g {};
template <typename...> using cb = be<ca<>>;
template <typename...> using cc = cb<>;
namespace x {
template <typename y> struct cd { using f = y; };
template <typename y, typename> class ce : be<cd<y>> {
using cf = be<cd<y>>;
using cf::f;
};
}
using x::ce;
template <typename, long> using cg = int;
template <typename, typename> struct ch;
template <typename... br, unsigned long... bl> struct ch<bc<br...>, bn<bl...>>
{
template <typename by> constexpr ch(by) noexcept(bw<m<cg<br, bl>>...>::e);
};
template <typename... br> using ci = ch<bc<br...>, bo<sizeof...(br)>>;
template <typename... br> using cj = ce<ci<br>...>;
namespace ck {
struct cl;
struct cm;
}
struct cn : cj<ck::cl, ck::cm> {};
struct co {
template <typename Pipeable> struct cp : Pipeable {};
};
template <typename cq, typename cr>
auto operator|(cq arg, cr cs) -> decltype(co::cp<cr>::cs(arg, cs));
struct cu {
template <typename cv> auto cw(cv cx, long) -> decltype(cx.cw());
};
template <typename cy> using cz = u<decltype(cu::cw(cy(), 2))>;
template <typename cy> using da = bz<cz<cy>>;
struct iter_transform_view;
template <typename> struct db {
template <typename bs = iter_transform_view, p<(cc<>()), int>::f = 0>
da<bs> begin();
};
template <typename> using adaptor_cursor_t = cn;
template <typename, typename> struct de : db<int> {
template <typename bs>
void begin_cursor_(bs) noexcept(adaptor_cursor_t<bs>{aa<bs>});
template <typename bs = int, p<(cc<>()), int>::f = 0>
auto cw() -> decltype(begin_cursor_(bs()));
};
struct df {
template <typename di> struct cp {
template <typename... br, typename dj = di>
static auto bb(br... dk) -> decltype(dj::bb(dk...));
};
template <typename dg> w<dg> operator()(dg);
} dl;
template <typename di> struct w {
di dm;
template <typename cv> using dn = t<cv>;
template <typename cv, typename Vw, typename p<(dn<cv>()), int>::f = 0>
static auto cs(cv cx, Vw) -> decltype(dm(cx));
template <typename... br, typename dj = di>
auto operator()(br... dk) -> decltype(dl(df::cp<dj>::bb(dm, dk...)));
};
struct iter_transform_view : de<int, int> {};
struct transform_fn {
template <typename dg>
static auto bb(transform_fn dh, dg) -> decltype(bb(dh, an, ct));
template <typename, typename> using Concept = t<>;
template <typename cv, typename dg,
typename p<(Concept<cv, dg>()), int>::f = 0>
iter_transform_view operator()(cv, dg);
};
w<transform_fn> dh;
void ApiWrapapplyAdminsList() {
auto admins = dc | dh([] {});
admins.begin();
}
This testcase is ice-on-invalid, but the original it was creduced from
https://bugzilla.redhat.com/show_bug.cgi?id=1622598#c0
is valid I believe (and with the PR87122 fix 8.x doesn't ICE on it and accepts
it).
>From gcc-bugs-return-613964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:03:38 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87125] [9 Regression] ICE in tsubst_copy starting with r261084
Date: Tue, 28 Aug 2018 11:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87125
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-28
CC| |jason at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The ICE is:
/usr/src/gcc/obj/gcc/rh1622598.ii: In instantiation of ‘constexpr
x::ce<ch<bc<ck::cl>, am<long unsigned int, 0> >, ch<bc<ck::cm>, am<long
unsigned int, 0> > >::ce(by) [with by = int (*)()][inherited from
ch<bc<ck::cl>, am<long unsigned int, 0> >]’:
/usr/src/gcc/obj/gcc/rh1622598.ii:118:8: required from ‘void de<
<template-parameter-1-1>, <template-parameter-1-2> >::begin_cursor_(bs) [with
bs = int; <template-parameter-1-1> = int; <template-parameter-1-2> = int]’
/usr/src/gcc/obj/gcc/rh1622598.ii:120:8: required by substitution of
‘template<class bs, int <anonymous> > decltype (((de<int, int>*)this)->de<int,
int>::begin_cursor_<bs>(bs())) de<int, int>::cw<bs, <enumerator> >() [with bs =
int; int <anonymous> = 0]’
/usr/src/gcc/obj/gcc/rh1622598.ii:106:31: required by substitution of
‘template<class cv> decltype (cx.cw()) cu::cw(cv, long int) [with cv =
iter_transform_view]’
/usr/src/gcc/obj/gcc/rh1622598.ii:108:52: required by substitution of
‘template<class cy> using cz = u<decltype (cu::cw(cy(), 2))> [with cy =
iter_transform_view]’
/usr/src/gcc/obj/gcc/rh1622598.ii:109:45: required by substitution of
‘template<class cy> using da = z::bz<cz<cy> > [with cy = iter_transform_view]’
/usr/src/gcc/obj/gcc/rh1622598.ii:113:10: required by substitution of
‘template<class bs, int <anonymous> > da<bs> db<int>::begin<bs, <enumerator>
>() [with bs = iter_transform_view; int <anonymous> = 0]’
/usr/src/gcc/obj/gcc/rh1622598.ii:149:16: required from here
/usr/src/gcc/obj/gcc/rh1622598.ii:84:13: internal compiler error: in
tsubst_copy, at cp/pt.c:15962
84 | using cf::f;
| ^
0xa78ebc tsubst_copy
../../gcc/cp/pt.c:15962
0xa8ad08 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:19038
0xa70a2a tsubst_exception_specification
../../gcc/cp/pt.c:14121
0xa9c93c regenerate_decl_from_template
../../gcc/cp/pt.c:23454
0xa9fe45 instantiate_decl(tree_node*, bool, bool)
../../gcc/cp/pt.c:24024
0x8aa7c3 instantiate_cx_fn_r
../../gcc/cp/constexpr.c:4902
0x1633540 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc/tree.c:11502
0x1634b8b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc/tree.c:11820
0x1634c98 walk_tree_without_duplicates_1(tree_node**, tree_node*
(*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*,
tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*,
default_hash_traits<tree_node*> >*))
../../gcc/tree.c:11846
0x8aa9eb instantiate_constexpr_fns
../../gcc/cp/constexpr.c:4921
0x8aad66 cxx_eval_outermost_constant_expr
../../gcc/cp/constexpr.c:4977
0x8ab9b1 maybe_constant_value(tree_node*, tree_node*)
../../gcc/cp/constexpr.c:5205
0x8abe08 fold_non_dependent_expr(tree_node*, int)
../../gcc/cp/constexpr.c:5297
0xb473b1 massage_init_elt
../../gcc/cp/typeck2.c:1264
0xb48429 process_init_constructor_record
../../gcc/cp/typeck2.c:1482
0xb4964e process_init_constructor
../../gcc/cp/typeck2.c:1744
0xb46d43 digest_init_r
../../gcc/cp/typeck2.c:1158
0xb46f4d digest_init_flags(tree_node*, tree_node*, int, int)
../../gcc/cp/typeck2.c:1203
0xad3e26 finish_compound_literal(tree_node*, tree_node*, int, fcl_t)
../../gcc/cp/semantics.c:2831
0xa89fe7 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:18877
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
where tsubst_copy doesn't handle DEFERRED_NOEXCEPT tree.
>From gcc-bugs-return-613965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:08:03 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/79189] Poor code generation when using stateless lambda instead of normal function
Date: Tue, 28 Aug 2018 11:08:00 -0000
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David Crocker <dcrocker at eschertech dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dcrocker at eschertech dot com
--- Comment #2 from David Crocker <dcrocker at eschertech dot com> ---
I have found another bug involving a const pointer to a lambda function, that
goes away if I use -std=gnu++17. I am constructing a const table of structs
that has a field of function pointer type, and I need it to go into .rodata
because of limited RAM on an embedded platform. I would like to use lambda
functions in the table definition, for example:
const ObjectModelTableEntry RepRap::objectModelTable[] =
{
{ ..., [] (ObjectModel* self) { return (void
*)&(((RepRap*)self)->GetGCodes()); }, ... }
};
Using GCC 7.3.1 20180622 with std=gnu++14, the compiler doesn't put this in the
rodata segment. If I change it to:
static void* func(ObjectModel *self) { return (void
*)&(((RepRap*)self)->GetGCodes()); }
const ObjectModelTableEntry RepRap::objectModelTable[] =
{
{ ..., func, ... }
};
then it does put it in rodata.
>From gcc-bugs-return-613966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:13:47 2018
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Subject: [Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug 28 11:13:04 2018
New Revision: 263915
URL: https://gcc.gnu.org/viewcvs?rev=263915&root=gcc&view=rev
Log:
PR middle-end/87099
* calls.c (maybe_warn_nonstring_arg): Punt early if
warn_stringop_overflow is zero. Don't call get_range_strlen
on 3rd argument, keep iterating until lenrng[1] is INTEGER_CST.
Swap comparison operands to have constants on rhs. Only use
lenrng[1] if non-NULL and INTEGER_CST. Don't uselessly
increment lenrng[0].
* gcc.dg/pr87099.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87099.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:20:25 2018
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Subject: [Bug c++/44580] inconsistent "right-hand operand of comma has no effect"
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-613969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:29:45 2018
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87126] New: ICE on valid code at -Os and above on x86_64-linux-gnu: in vn_reference_insert, at tree-ssa-sccvn.c:2698
Date: Tue, 28 Aug 2018 11:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87126
Bug ID: 87126
Summary: ICE on valid code at -Os and above on
x86_64-linux-gnu: in vn_reference_insert, at
tree-ssa-sccvn.c:2698
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
This is a very recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180827 (experimental) [trunk revision 263892] (GCC)
$
$ gcctk -O1 -c small.c
$
$ gcctk -Os -c small.c
during GIMPLE pass: fre
small.c: In function ‘f’:
small.c:16:1: internal compiler error: in vn_reference_insert, at
tree-ssa-sccvn.c:2698
16 | }
| ^
0xe5881f vn_reference_insert
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:2698
0xe59d9e visit_reference_op_store
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:4066
0xe59d9e visit_stmt
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:4314
0xe5b63b process_bb
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:5984
0xe5d30c do_rpo_vn
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:6408
0xe5e21c execute
../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:6597
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
----------------------
int a, *b;
void f ()
{
int d = 0, e = d;
while (a++)
;
if (e)
goto L2;
L1:
d = e;
b = &d;
L2:
if (d)
goto L1;
}
>From gcc-bugs-return-613968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:29:08 2018
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Subject: [Bug testsuite/87078] [9 regression] gcc.dg/vect/slp-37.c begins failing with r263772
Date: Tue, 28 Aug 2018 11:29:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Patch applied.
>From gcc-bugs-return-613970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:36:32 2018
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Subject: [Bug fortran/80477] [OOP] Polymorphic function result generates memory leak
Date: Tue, 28 Aug 2018 11:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80477
--- Comment #24 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Aug 28 11:35:52 2018
New Revision: 263916
URL: https://gcc.gnu.org/viewcvs?rev=263916&root=gcc&view=rev
Log:
2017-08-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80477
* trans-expr.c (gfc_conv_procedure_call): Allocatable class
scalar results being passed to a derived type formal argument
are finalized if possible. Otherwise, rely on existing code for
deallocation. Make the deallocation of allocatable result
components conditional on finalization not taking place. Make
the freeing of data components after finalization conditional
on the data being NULL.
(gfc_trans_arrayfunc_assign): Change the gcc_assert to a
condition to return NULL_TREE.
(gfc_trans_assignment_1): If the assignment is class to class
and the rhs expression must be finalized but the assignment
is not marked as a polymorphic assignment, use the vptr copy
function instead of gfc_trans_scalar_assign.
PR fortran/86481
* trans-expr.c (gfc_conv_expr_reference): Do not add the post
block to the pre block if the expression is to be finalized.
* trans-stmt.c (gfc_trans_allocate): If the expr3 must be
finalized, load the post block into a finalization block and
add it right at the end of the allocation block.
2017-08-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80477
* gfortran.dg/class_result_7.f90: New test.
* gfortran.dg/class_result_8.f90: New test.
* gfortran.dg/class_result_9.f90: New test.
PR fortran/86481
* gfortran.dg/allocate_with_source_25.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocate_with_source_25.f90
trunk/gcc/testsuite/gfortran.dg/class_result_7.f90
trunk/gcc/testsuite/gfortran.dg/class_result_8.f90
trunk/gcc/testsuite/gfortran.dg/class_result_9.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:36:32 2018
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Subject: [Bug fortran/86481] [OOP] Memory leak with sourced allocation
Date: Tue, 28 Aug 2018 11:36:00 -0000
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Aug 28 11:35:52 2018
New Revision: 263916
URL: https://gcc.gnu.org/viewcvs?rev=263916&root=gcc&view=rev
Log:
2017-08-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80477
* trans-expr.c (gfc_conv_procedure_call): Allocatable class
scalar results being passed to a derived type formal argument
are finalized if possible. Otherwise, rely on existing code for
deallocation. Make the deallocation of allocatable result
components conditional on finalization not taking place. Make
the freeing of data components after finalization conditional
on the data being NULL.
(gfc_trans_arrayfunc_assign): Change the gcc_assert to a
condition to return NULL_TREE.
(gfc_trans_assignment_1): If the assignment is class to class
and the rhs expression must be finalized but the assignment
is not marked as a polymorphic assignment, use the vptr copy
function instead of gfc_trans_scalar_assign.
PR fortran/86481
* trans-expr.c (gfc_conv_expr_reference): Do not add the post
block to the pre block if the expression is to be finalized.
* trans-stmt.c (gfc_trans_allocate): If the expr3 must be
finalized, load the post block into a finalization block and
add it right at the end of the allocation block.
2017-08-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80477
* gfortran.dg/class_result_7.f90: New test.
* gfortran.dg/class_result_8.f90: New test.
* gfortran.dg/class_result_9.f90: New test.
PR fortran/86481
* gfortran.dg/allocate_with_source_25.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocate_with_source_25.f90
trunk/gcc/testsuite/gfortran.dg/class_result_7.f90
trunk/gcc/testsuite/gfortran.dg/class_result_8.f90
trunk/gcc/testsuite/gfortran.dg/class_result_9.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:43:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
Date: Tue, 28 Aug 2018 11:43:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug 28 11:43:22 2018
New Revision: 263917
URL: https://gcc.gnu.org/viewcvs?rev=263917&root=gcc&view=rev
Log:
PR middle-end/87099
* calls.c (maybe_warn_nonstring_arg): Punt early if
warn_stringop_overflow is zero. Don't call get_range_strlen
on 3rd argument, keep iterating until lenrng[1] is INTEGER_CST.
Only use lenrng[1] if non-NULL and INTEGER_CST. Don't uselessly
increment lenrng[0].
* gcc.dg/pr87099.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87099.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/calls.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-613973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:47:55 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Tue, 28 Aug 2018 11:47:00 -0000
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Jakub's patch looks right to me. Take this as post-test approval.
>From gcc-bugs-return-613975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:49:48 2018
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87127] New: External function not recognised from within an associate block
Date: Tue, 28 Aug 2018 11:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87127
Bug ID: 87127
Summary: External function not recognised from within an
associate block
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: pault at gcc dot gnu.org
Target Milestone: ---
Posted on:
https://groups.google.com/forum/#!topic/comp.lang.fortran/Jc_3vZeATdU
function exfunc(i)
implicit none
integer :: exfunc,i
exfunc = 2*i
end function
! contents of test.f90
program test
implicit none
integer :: exfunc,i
integer,parameter :: array(2)=[6,7]
associate(i=>array(1))
write(*,*) exfunc(i)
end associate
end program
produces
write(*,*) exfunc(i)
1
Error: ‘exfunc’ at (1) is not a function
Removing the associate block, invoking 'exfunc' outside it or declaring it
explicitly to be a function all remove the error.
Other brands compile the testcase without error.
At first glance, it seems that resolution of symbols in the main program is
occurring without taking the associate block into account and that this is
resolved afterwards.
>From gcc-bugs-return-613974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:49:38 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87124] [9 Regression] ICE have integer_cst in SSA_VAL, at tree-ssa-sccvn.c:462 while building 541.leela_r from SPEC2017
Date: Tue, 28 Aug 2018 11:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-28
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, mine.
>From gcc-bugs-return-613976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:55:00 2018
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Subject: [Bug middle-end/87099] [8 Regression] internal compiler error: segmentation fault
Date: Tue, 28 Aug 2018 11:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Summary|[8/9 Regression] internal |[8 Regression] internal
|compiler error: |compiler error:
|segmentation fault |segmentation fault
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-613977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 11:55:06 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87128] New: Wrong Value Generated for m32 without optimization
Date: Tue, 28 Aug 2018 11:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87128
Bug ID: 87128
Summary: Wrong Value Generated for m32 without optimization
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: neha.gnu.gcc at gmail dot com
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Created attachment 44615
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44615&action=edit
Testcase to generate the issue
When the attached file is compiled for -m32 without any optimization,
it generates wrong result.
$gcc test.c -m32
$ ./a.out
result = -8388608.000000 -> Wrong result
$gcc test.c -m32 -O1
$ ./a.out
result = 0.000000 -> Correct result
Additional Info
Checked with many native GCC from GCC-4.1.0 to current upstream sources.
The result in only wrong when the values of exponents add to zero.
And the value of a is equal or greater than 1.0e23
Example1 a = 1.0e23 b = 1.0e15 c = 1.0e8
Example2 a = 1.0e28 b = 1.0e15 c = 1.0e13
The issue is not observed in the following scenarios
1. Any optimization is enabled.
2. m64
3. Precision value set to mpc64
Are the values greater than 1.0e23 not handled by 32 properly?
Is anything obvious being missed in the testcase?
>From gcc-bugs-return-613978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 12:36:43 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87128] Wrong Value Generated for m32 without optimization
Date: Tue, 28 Aug 2018 12:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87128
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
1e23 is outside the range where all integers can be represented exactly by a
64-bit IEEE double, and the calculation is imprecise when using i387 floating
point registers.
The expected answer is given when using:
-ffloat-store
or when using:
-msse -mfpmath=sse -fexcess-precision=standard
>From gcc-bugs-return-613979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:14:27 2018
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Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Tue, 28 Aug 2018 13:14:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|marxin at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44616
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44616&action=edit
gcc9-pr87095.patch
Full patch I'm going to bootstrap/regtest. The convert_to_void is IMHO
desirable so that the gimplifier doesn't try to read from the vptr again and
store it into a dead temporary, if it is conditional. build_clobber_this
doesn't need that, as the MODIFY_EXPR it creates already has void type.
>From gcc-bugs-return-613980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:37:23 2018
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Subject: [Bug tree-optimization/87124] [9 Regression] ICE have integer_cst in SSA_VAL, at tree-ssa-sccvn.c:462 while building 541.leela_r from SPEC2017
Date: Tue, 28 Aug 2018 13:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-613981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:37:31 2018
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Subject: [Bug tree-optimization/87124] [9 Regression] ICE have integer_cst in SSA_VAL, at tree-ssa-sccvn.c:462 while building 541.leela_r from SPEC2017
Date: Tue, 28 Aug 2018 13:37:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug 28 13:36:49 2018
New Revision: 263918
URL: https://gcc.gnu.org/viewcvs?rev=263918&root=gcc&view=rev
Log:
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87124
* tree-ssa-sccvn.c (vn_lookup_simplify_result): Guard against
constants before looking up avail.
* g++.dg/torture/pr87124.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr87124.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-613982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:45:51 2018
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Subject: [Bug tree-optimization/87126] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: in vn_reference_insert, at tree-ssa-sccvn.c:2698
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-28
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|ICE on valid code at -Os |[9 Regression] ICE on valid
|and above on |code at -Os and above on
|x86_64-linux-gnu: in |x86_64-linux-gnu: in
|vn_reference_insert, at |vn_reference_insert, at
|tree-ssa-sccvn.c:2698 |tree-ssa-sccvn.c:2698
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, mine.
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Subject: [Bug c/87128] Wrong Value Generated for m32 without optimization
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Dup of 323 then?
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Subject: [Bug middle-end/323] optimized code gives strange floating point results
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |neha.gnu.gcc at gmail dot com
--- Comment #207 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 87128 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-613984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:54:31 2018
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Subject: [Bug c/87128] Wrong Value Generated for m32 without optimization
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yes.
*** This bug has been marked as a duplicate of bug 323 ***
>From gcc-bugs-return-613986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 13:58:29 2018
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Subject: [Bug c++/86993] [6/7/8/9 Regression] assignment of read-only variable error reported at wrong location
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk, not going to backport.
>From gcc-bugs-return-613987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 14:23:25 2018
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Subject: [Bug c/87128] Wrong Value Generated for m32 without optimization
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--- Comment #4 from Neha Gowda <neha.gnu.gcc at gmail dot com> ---
Thanks for the explanation.
>From gcc-bugs-return-613988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 14:26:10 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/63392] poor error recovery with missing typename
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I've added a fix-it hint (for gcc 9), but I'm not planning to improve the
error-recovery at this time.
>From gcc-bugs-return-613989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 14:40:26 2018
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Subject: [Bug tree-optimization/87126] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: in vn_reference_insert, at tree-ssa-sccvn.c:2698
Date: Tue, 28 Aug 2018 14:40:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So when we disentangle the irreducible region we expose a disconnect between
the current execution flow and the RPO iteration. This means we insert the
load d.2_4 = d; with the VDEF of the later processed store d = e_10; which
then triggers the assert. We do run into the DEF in vn_reference_lookup_3
but that doesn't handle this simple case given we expect it to be handled
by visiting the def before the use ...
This shows the assert triggers on missed optimizations which means we
can as well remove it.
Better strategies for irreducible regions would include re-computing
RPO order on-the fly when necessary.
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Subject: [Bug c++/86546] ICE on invalid: tree_class_check_failed()
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--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Aug 28 15:01:15 2018
New Revision: 263921
URL: https://gcc.gnu.org/viewcvs?rev=263921&root=gcc&view=rev
Log:
/cp
2018-08-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/86546
* decl.c (finish_case_label): If the type is erroneous early
return error_mark_node.
/testsuite
2018-08-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/86546
* g++.dg/other/switch4.C: New.
Added:
trunk/gcc/testsuite/g++.dg/other/switch4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86546] ICE on invalid: tree_class_check_failed()
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
>From gcc-bugs-return-613992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 15:34:35 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87116] Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
Date: Tue, 28 Aug 2018 15:34:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Aug 28 15:33:53 2018
New Revision: 263922
URL: https://gcc.gnu.org/viewcvs?rev=263922&root=gcc&view=rev
Log:
PR libstdc++/87116 fix path::lexically_normal() handling of dot-dot
Previously the logic that turned "a/b/c/../.." into "a/" failed to
preserve an empty path at the end of the iteration sequence, as required
by the trailing slash. That meant the result didn't meet the class
invariants, and that "a/b/c/d/../../.." would remove four components
instead of the three that "../../.." should remove.
PR libstdc++/87116
* src/filesystem/std-path.cc (path::lexically_normal): When handling
a dot-dot filename, preserve an empty final component in the iteration
sequence.
[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use preferred-separator for
root-directory.
* testsuite/27_io/filesystem/path/generation/normal.cc: Add new tests
for more than two adjacent dot-dot filenames.
[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Replace slashes with
preferred-separator in expected normalized strings.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/filesystem/std-path.cc
trunk/libstdc++-v3/testsuite/27_io/filesystem/path/generation/normal.cc
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87116] Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
Date: Tue, 28 Aug 2018 15:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87116
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Aug 28 15:52:18 2018
New Revision: 263923
URL: https://gcc.gnu.org/viewcvs?rev=263923&root=gcc&view=rev
Log:
PR libstdc++/87116 fix path::lexically_normal() handling of dot-dot
Previously the logic that turned "a/b/c/../.." into "a/" failed to
preserve an empty path at the end of the iteration sequence, as required
by the trailing slash. That meant the result didn't meet the class
invariants, and that "a/b/c/d/../../.." would remove four components
instead of the three that "../../.." should remove.
PR libstdc++/87116
* src/filesystem/std-path.cc (path::lexically_normal): When handling
a dot-dot filename, preserve an empty final component in the iteration
sequence.
[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use preferred-separator for
root-directory.
* testsuite/27_io/filesystem/path/generation/normal.cc: Add new tests
for more than two adjacent dot-dot filenames.
[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Replace slashes with
preferred-separator in expected normalized strings.
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/src/filesystem/std-path.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/27_io/filesystem/path/generation/normal.cc
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Subject: [Bug libstdc++/87116] Incorrect result of std::filesystem::path::lexically_normal() for more than 3 dot-dot elements
Date: Tue, 28 Aug 2018 15:53:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for gcc 8.3
>From gcc-bugs-return-613996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 16:01:41 2018
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From: "pipcet at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
Date: Tue, 28 Aug 2018 16:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87104
pipcet at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44605|0 |1
is obsolete| |
Attachment #44606|0 |1
is obsolete| |
--- Comment #11 from pipcet at gmail dot com ---
Created attachment 44617
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44617&action=edit
WIP patch
I'm having partial success with this patch, which does two things:
1. Canonicalize to the easier-to-read (X & A) == B form
2. Emit optimized lea-test sequence for (X & A) == B
(1) is straightforward; we need a new routine to test that an integer
masks a contiguous range of bit positions.
(2) is straightforward except for there being three cases: 32-bit,
64-bit, and mixed. Emacs uses the mixed case, where the lower 3 bits
of a 64 bit value are tested.
The strange thing is that code like
int h17(long int i)
{
if ((i & 12) == 12)
return 1;
return 0;
}
does not work. I see this intermediate RTL:
(insn 7 6 8 2 (set (reg:CCZ 17 flags)
(compare:CCZ (and:DI (not:DI (reg/v:DI 86 [ i ]))
(const_int 12 [0xc]))
(const_int 0 [0]))) "h17.c":4 15 {*cmpdi_1}
(expr_list:REG_DEAD (reg:DI 88)
Surely we should be dealing with a canonical form instead? Who's
generating this non-canonical expression, and why?
Is it legal to do something like
{
operands[2] = negate_rtx (operands[2]);
}
in a define_split? That would avoid the need to generate complicated
RTL exprs from C.
Anyway, this all needs more work and much more testing, but it's a start.
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From: "ian at geometrian dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87129] New: -Wsign-conversion Erroneously Triggered When Dereferencing Pointer From Implicit User Conversion
Date: Tue, 28 Aug 2018 16:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87129
Bug ID: 87129
Summary: -Wsign-conversion Erroneously Triggered When
Dereferencing Pointer From Implicit User Conversion
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ian at geometrian dot com
Target Milestone: ---
When dereferencing a pointer created from calling an implicit user conversion,
g++ erroneously produces a warning from -Wsign-conversion about (inexplicably)
converting `size_t` into a signed integer type. If a pointer of the same type
is used instead, (correctly) no warning is generated.
Minimal sample:
//Compile with `-Wsign-conversion`
#include <cstdlib> //`size_t`
extern float* data;
struct Accessor {
operator float*() {
return data;
}
};
float foo(Accessor accessor, size_t i) {
return accessor[i];
}
Output (9.0.0 20180824 x86-64):
<source>: In function 'float foo(Accessor, size_t)':
<source>:13:20: warning: conversion to 'long int' from 'size_t' {aka 'long
unsigned int'} may change the sign of the result [-Wsign-conversion]
13 | return accessor[i];
| ^
Tested as occurring in many versions of g++, from 9.0 back to at least 4.4.
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Subject: [Bug tree-optimization/86914] [8 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
Date: Tue, 28 Aug 2018 16:44:00 -0000
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Aug 28 16:43:58 2018
New Revision: 263925
URL: https://gcc.gnu.org/viewcvs?rev=263925&root=gcc&view=rev
Log:
PR tree-optimization/86914 - wrong code with strlen() of poor-man's flexible
array member plus offset
gcc/ChangeLog:
PR tree-optimization/86914
* tree-ssa-strlen.c (maybe_set_strlen_range): Avoid MEM_REF.
gcc/testsuite/ChangeLog:
PR tree-optimization/86914
* gcc.dg/strlenopt-57.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/strlenopt-57.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-strlen.c
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Tue, 28 Aug 2018 16:45:00 -0000
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Bug 83819 depends on bug 86914, which changed state.
Bug 86914 Summary: [8 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86914
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86914] [8 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
Date: Tue, 28 Aug 2018 16:45:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Backported to GCC 8 in r263925.
>From gcc-bugs-return-614000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 17:05:58 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87130] New: [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 28 Aug 2018 17:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87130
Bug ID: 87130
Summary: [9 Regression] LTO bootstrap failed with
profiledbootstrap
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
On x86-64, r263887 gave
/export/project/git/gcc-bisect-bootstrap/master/263887/bld/./prev-gcc/xg++
-B/export/project/git/gcc-bisect-bootstrap/master/263887/bld/./prev-gcc/
-B/export/project/git/gcc-bisect-bootstrap/master/263887/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/export/project/git/gcc-bisect/gcc/libstdc++-v3/libsupc++
-L/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/export/project/git/gcc-bisect-bootstrap/master/263887/bld/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-no-pie -g -O2 -fno-checking -flto=jobserver -frandom-seed=1
-fprofile-generate -flto=jobserver -frandom-seed=1 -DIN_GCC -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common
-DHAVE_CONFIG_H -static-libstdc++ -static-libgcc -o gengtype \
gengtype.o gengtype-lex.o gengtype-parse.o gengtype-state.o version.o
errors.o libcommon.a ../libcpp/libcpp.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a ../libbacktrace/.libs/libbacktrace.a libcommon.a
../libcpp/libcpp.a ../libbacktrace/.libs/libbacktrace.a
../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
/export/project/git/gcc-bisect/gcc/libiberty/regex.c:1460:5: error:
‘xre_max_failures’ has already been defined
1460 | int re_max_failures = 4000;
| ^
/export/project/git/gcc-bisect/gcc/libiberty/regex.c:1460:5: note: previously
defined here
lto1: fatal error: errors during merging of translation units
compilation terminated.
lto-wrapper: fatal error:
/export/project/git/gcc-bisect-bootstrap/master/263887/bld/./prev-gcc/xg++
returned 1 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[3]: *** [Makefile:2867: gengtype] Error 1
make[3]: *** Waiting for unfinished jobs....
mv -f Tlto-wrapper lto-wrapper
mv -f Tcollect2 collect2
rm fsf-funding.pod gcov.pod gpl.pod cpp.pod gfdl.pod gcc.pod gcov-dump.pod
gcov-tool.pod
make[3]: Leaving directory
'/export/project/git/gcc-bisect-bootstrap/master/263887/bld/gcc'
make[2]: *** [Makefile:4767: all-stageprofile-gcc] Error 2
make[2]: Leaving directory
'/export/project/git/gcc-bisect-bootstrap/master/263887/bld'
make[1]: *** [Makefile:21882: stageprofile-bubble] Error 2
make[1]: Leaving directory
'/export/project/git/gcc-bisect-bootstrap/master/263887/bld'
make: *** [Makefile:22136: profiledbootstrap] Error 2
when GCC was configured with
--with-build-config=bootstrap-lto --disable-werror
>From gcc-bugs-return-614001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 18:19:35 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86010] [7/8/9 Regression] redundant memset with smaller size not eliminated
Date: Tue, 28 Aug 2018 18:19:00 -0000
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--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
We don't merge the two memset calls in the second example. It's of arguable
value IMHO.
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed in r263928.
>From gcc-bugs-return-614003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 19:10:16 2018
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Aug 28 19:09:38 2018
New Revision: 263928
URL: https://gcc.gnu.org/viewcvs?rev=263928&root=gcc&view=rev
Log:
PR middle-end/86631 - missing -Walloc-size-larger-than on ILP32 hosts
gcc/ChangeLog:
PR middle-end/86631
* calls.c (alloc_max_size): Treat HOST_WIDE_INT special.
* gimple-ssa-warn-alloca.c (adjusted_warn_limit): New function.
(pass_walloca::gate): Use it.
(alloca_call_type): Same.
(pass_walloca::execute): Same.
* stor-layout.c (layout_decl): Treat HOST_WIDE_INT special.
gcc/testsuite/ChangeLog:
PR middle-end/86631
* g++.dg/Walloca1.C: Adjust.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/gimple-ssa-warn-alloca.c
trunk/gcc/stor-layout.c
trunk/gcc/testsuite/g++.dg/Walloca1.C
>From gcc-bugs-return-614004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 19:13:59 2018
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Subject: [Bug bootstrap/87130] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 28 Aug 2018 19:13:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-28
CC| |mliska at suse dot cz
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r263880.
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Subject: [Bug bootstrap/87130] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 28 Aug 2018 19:25:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine.
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Subject: [Bug c++/85265] [concepts] ICE with missing identifier
Date: Tue, 28 Aug 2018 19:48:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Aug 28 19:58:02 2018
New Revision: 263930
URL: https://gcc.gnu.org/viewcvs?rev=263930&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
PR middle-end/86631
* g++.dg/Walloca1.C: Adjust.
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/87009] Can't find XOR pattern applying De Morgan sequentially
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87009
--- Comment #3 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Aug 28 20:23:05 2018
New Revision: 263931
URL: https://gcc.gnu.org/viewcvs?rev=263931&root=gcc&view=rev
Log:
PR tree-optimization/87009
* match.pd: Add boolean optimizations.
PR tree-optimization/87009
* gcc.dg/pr87009.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87009.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 20:25:23 2018
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Subject: [Bug middle-end/87009] Can't find XOR pattern applying De Morgan sequentially
Date: Tue, 28 Aug 2018 20:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87009
Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |law at redhat dot com
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--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk.
>From gcc-bugs-return-614010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 21:28:42 2018
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From: "john.k-askubuntu at decanary dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87131] New: 16bit xor operation results in 32bit
Date: Tue, 28 Aug 2018 21:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87131
Bug ID: 87131
Summary: 16bit xor operation results in 32bit
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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//gcc ARM compiler, came with ti CCS v5
typedef short int int16_t;
int16_t a, b;
int result = 0;
a = 0x1234;
b = a ^ 0xa5a5;
if(b == (a ^ 0xa5a5))
{
result = 1;
}
// result is 0
// in disassembly, R1 = 0x0000b791, R2 = 0xffffb791
>From gcc-bugs-return-614011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 21:42:56 2018
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Subject: [Bug c/87131] 16bit xor operation results in 32bit
Date: Tue, 28 Aug 2018 21:42:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
This is the effect of integer promotion.
>From gcc-bugs-return-614012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 21:51:38 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87132] New: Gcc miscompiles at -O2 on valid code
Date: Tue, 28 Aug 2018 21:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87132
Bug ID: 87132
Summary: Gcc miscompiles at -O2 on valid code
Product: gcc
Version: unknown
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It seems to be a recent regression starting from r263875 (need double check).
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180828 (experimental) [trunk revision 263917] (GCC)
$ gcc-trunk abc.c ; ./a.out
0
$ gcc-trunk -O2 abc.c ; ./a.out
4
$ cat abc.c
int printf(const char *, ...);
int a, b;
short c;
char d;
int main() {
int e[] = {4, 4, 4, 4, 4, 4, 4, 4, 4};
d = 8;
for (; d; d--) {
a = 0;
for (; a <= 8; a++) {
c = e[1];
e[d] = b;
}
}
printf("%d\n", c);
}
>From gcc-bugs-return-614013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 28 22:31:23 2018
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Subject: [Bug fortran/85042] Empty derived type allocation ICE
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Brad Richardson <brichardson at structint dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-614014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 01:50:25 2018
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Subject: [Bug middle-end/85902] -Wstringop-truncation false-positive
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The last test case is no longer diagnosed either by GCC 8 or the current trunk.
The first two still are.
>From gcc-bugs-return-614015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 02:44:38 2018
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Subject: [Bug c++/57170] Diagnostic for a negative case when switching over unsigned comes from -Wsign-conversion instead of -Wpedantic or -Wnarrowing
Date: Wed, 29 Aug 2018 02:44:00 -0000
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> Diagnostics for narrowing conversions involving non-constants are controlled
> by -Wnarrowing (allowing them to be either warnings or errors). But
> narrowing conversions involving constants are always errors. Case labels
> must be constants, so making this depend on -Wnarrowing wouldn't seem
> appropriate to me.
So -Wpedantic instead? Or -fpermissive?
>From gcc-bugs-return-614016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 02:56:47 2018
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Subject: [Bug c++/45113] absent or confusing diagnostics of invalid template argument list in implicit template class instantiation
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-614017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 06:39:39 2018
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Subject: [Bug target/87133] New: ICE in aggregate_value_p with -frounding-math on ppc64le
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87133
Bug ID: 87133
Summary: ICE in aggregate_value_p with -frounding-math on
ppc64le
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Target Milestone: ---
Following causes ICE:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90
-frounding-math
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:5:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Loop variable at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:8:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Start expression in DO loop at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:13:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: End expression in DO loop at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:19:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Step expression in DO loop at (1) must be integer
during RTL pass: expand
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:0:
13 | do x = 1.0, 2.05, 0.1
|
internal compiler error: Segmentation fault
0x10fff2c crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff69d810f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xccabbd aggregate_value_p(tree_node const*, tree_node const*)
/home/marxin/Programming/gcc/gcc/function.c:2046
0xa92e21 emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
/home/marxin/Programming/gcc/gcc/calls.c:4745
0xc0fd85 emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, rtx_def*, machine_mode)
/home/marxin/Programming/gcc/gcc/rtl.h:4185
0xc2ddb2 convert_mode_scalar
/home/marxin/Programming/gcc/gcc/expr.c:329
0xc2d8e4 convert_move(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:271
0xc306d7 convert_modes(machine_mode, machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:712
0xc2fc57 convert_to_mode(machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:637
0xf81a00 expand_fix(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/optabs.c:4930
0xc515e6 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/home/marxin/Programming/gcc/gcc/expr.c:8961
0xab0412 expand_gimple_stmt_1
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3673
0xab068f expand_gimple_stmt
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3734
0xab93b3 expand_gimple_basic_block
/home/marxin/Programming/gcc/gcc/cfgexpand.c:5770
0xabadb2 execute
/home/marxin/Programming/gcc/gcc/cfgexpand.c:6373
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Subject: [Bug tree-optimization/87126] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: in vn_reference_insert, at tree-ssa-sccvn.c:2698
Date: Wed, 29 Aug 2018 06:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87126
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Aug 29 06:47:14 2018
New Revision: 263944
URL: https://gcc.gnu.org/viewcvs?rev=263944&root=gcc&view=rev
Log:
2018-08-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/87126
* tree-ssa-sccvn.c (vn_reference_insert): Remove assert.
* gcc.dg/tree-ssa/pr87126.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr87126.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87126] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: in vn_reference_insert, at tree-ssa-sccvn.c:2698
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Wed, 29 Aug 2018 06:51:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Aug 29 06:49:06 2018
New Revision: 263945
URL: https://gcc.gnu.org/viewcvs?rev=263945&root=gcc&view=rev
Log:
2018-08-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-sccvn.c (eliminate_dom_walker::eliminate_stmt): Only
re-value-number released SSA VDEFs.
* gfortran.dg/pr87117.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr87117.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed again.
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Subject: [Bug tree-optimization/87132] [9 Regression] Gcc miscompiles at -O2 on valid code
Date: Wed, 29 Aug 2018 06:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Version|unknown |9.0
Keywords| |wrong-code
Last reconfirmed| |2018-08-29
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Gcc miscompiles at -O2 on |[9 Regression] Gcc
|valid code |miscompiles at -O2 on valid
| |code
Target Milestone|--- |9.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug bootstrap/87134] New: [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 29 Aug 2018 07:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87134
Bug ID: 87134
Summary: [9 regression] SEGV in cc1 caused by r263875
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Host: *-*-solaris2.11
Target: *-*-solaris2.11
Build: *-*-solaris2.11
Between 20180822 (r263778) and 20180828 (r263922), Solaris bootstrap (both
sparc
and x86) broke like this:
/var/gcc/reghunt/tspsegv/48038/./gcc/xgcc
-B/var/gcc/reghunt/tspsegv/48038/./gcc/ -B/usr/local/i386-pc-solaris2.11/bin/
-B/usr/local/i386-pc-solaris2.11/lib/ -isystem
/usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -fno-checking -DHAVE_CONFIG_H -I..
-I/var/gcc/reghunt/trunk/libstdc++-v3/../libiberty
-I/var/gcc/reghunt/trunk/libstdc++-v3/../include -D_GLIBCXX_SHARED
-I/var/gcc/reghunt/tspsegv/48038/i386-pc-solaris2.11/libstdc++-v3/include/i386-pc-solaris2.11
-I/var/gcc/reghunt/tspsegv/48038/i386-pc-solaris2.11/libstdc++-v3/include
-I/var/gcc/reghunt/trunk/libstdc++-v3/libsupc++ -g -O2 -DIN_GLIBCPP_V3
-Wno-error -c cp-demangle.c -fPIC -DPIC -o cp-demangle.o -v -save-temps
[...]
xgcc: internal compiler error: Segmentation Fault signal terminated program cc1
during stage2 (also in several other places). A reghunt identified this patch
as the culprit:
2018-08-27 Richard Biener <rguenther@suse.de>
* cfganal.h (rev_post_order_and_mark_dfs_back_seme): Declare.
* cfganal.c (rev_post_order_and_mark_dfs_back_seme): New function.
* tree-ssa-sccvn.h (struct vn_pval): New structure.
(struct vn_nary_op_s): Add unwind_to member. Add
predicated_values flag and put result into a union together
with a linked list of vn_pval.
(struct vn_ssa_aux): Add name member to make maintaining
a map of SSA name to vn_ssa_aux possible. Remove no longer
needed info, dfsnum, low, visited, on_sccstack, use_processed
and range_info_anti_range_p members.
(run_scc_vn, vn_eliminate, free_scc_vn, vn_valueize): Remove.
(do_rpo_vn, run_rpo_vn, eliminate_with_rpo_vn, free_rpo_vn):
New functions.
(vn_valueize): New global.
(vn_context_bb): Likewise.
(VN_INFO_RANGE_INFO, VN_INFO_ANTI_RANGE_P, VN_INFO_RANGE_TYPE,
VN_INFO_PTR_INFO): Remove.
* tree-ssa-sccvn.c: ... (rewrite)
(pass_fre::execute): For -O2+ initialize loops and run
RPO VN in optimistic mode (iterating). For -O1 and -Og
run RPO VN in non-optimistic mode.
[...]
Unfortunately, the error is somewhat evasive: running cc1 directly on the .i
file succeeds. However, the core dump reveals a bit more. While gdb cannot
handle it, dbx can:
program terminated by signal SEGV (no mapping at the fault address)
0xfaae80cc: t_splay+0x0026: movl 0x00000008(%esi),%edx
Current function is crash_signal
325 internal_error ("%s", strsignal (signo));
(dbx) where
dbx: warning: loop detected in stack
[1] t_splay(0xabd2150, 0x0, 0xfabbe145, 0xfaae7f5e), at 0xfaae80cc
[2] t_delete(0xabd2150, 0xfac08000, 0xfeffb398, 0xfaae7bf6), at 0xfaae7f81
[3] realfree(0xabd2138, 0xf9214fa0, 0x8848cd8, 0xfaae7d7f), at 0xfaae7c48
[4] _morecore(0x40, 0xfac08000, 0xfac09348, 0xfaae7574), at 0xfaae7f23
[5] _malloc_unlocked(0x3c), at 0xfaae7712
[6] do_malloc(0x3c, 0x0, 0xfeffb498, 0xfaae74cc), at 0xfaae7537
[7] malloc(0x3c, 0x0, 0xa, 0xfaafcb62), at 0xfaae74e0
[8] strdup(0xfeffb720, 0x14, 0xfeffb4d8, 0xfab13d48), at 0xfaafcb7e
[9] handle_mo(0xfeffb5c0, 0xfeffbb6c, 0x0, 0xfab12591), at 0xfab13db6
[10] _real_gettext_u_l(0xfaaab6ac, 0xfaa585b4, 0x0, 0x0, 0x5, 0x0,
0xfeffbb6c, 0xfab12c81), at 0xfab1296a
[11] _real_gettext_u(0xfaaab6ac, 0xfaa585b4, 0x0, 0x0, 0x5, 0x0, 0xfeffbbb8,
0xfab10891), at 0xfab12caf
[12] dgettext(0xfaaab6ac, 0xfaa585b4, 0x0, 0xfaafcfb4), at 0xfab108cf
[13] strsignal(0xb, 0x0, 0x1, 0x0), at 0xfaafcfe6
=>[14] crash_signal(signo = 11), line 325 in "toplev.c"
[15] __sighndlr(0xb, 0x0, 0xfeffbcd0, 0x93d6d44), at 0xfabba015
[16] call_user_handler(0xb), at 0xfabac0ec
[17] sigacthandler(0xb, 0x0, 0xfeffbcd0, 0x1f, 0x0, 0x0), at 0xfabac59b
---- called from signal handler with signal 11 (SIGSEGV) ------
[18] t_splay(0xabd21cc, 0x2, 0x87282bc, 0xfaae7f5e), at 0xfaae80cc
[19] t_delete(0xabd21cc, 0x0, 0xfeffca18, 0xfaae7bf6), at 0xfaae7f81
[20] realfree(0xabd2158, 0x3082fe, 0xfac09348, 0xfaae7574), at 0xfaae7c48
[21] _malloc_unlocked(0x18), at 0xfaae7782
[22] do_malloc(0x18, 0x0, 0xfeffcaf8, 0xfaae74cc), at 0xfaae7537
[23] malloc(0x18, 0x2011c7, 0x80471eed, 0x7ee65b58), at 0xfaae74e0
[24] xrealloc(oldmem = (nil), size = 24U), line 177 in "xmalloc.c"
[25] va_heap::reserve<std::pair<int, int> >(v = (nil), reserve = 2U, exact =
true), line 288 in "vec.h"
[26] vec<std::pair<int, int>, va_heap, vl_ptr>::reserve(this = 0xabdf7bc,
nelems = 2U, exact = true), line 1621 in "vec.h"
[27] vec<std::pair<int, int>, va_heap, vl_ptr>::reserve_exact(this =
0xabdf7bc, nelems = 2U), line 1641 in "vec.h"
[28] rpo_elim::eliminate_push_avail(this = 0xfeffcd90, bb = 0xf9a50c30,
leader = 0xf96bd230), line 5770 in "tree-ssa-sccvn.c"
[29] process_bb(avail = CLASS, bb = 0xf9a50c30, bb_visited = false,
iterate_phis = false, iterate = true, eliminate = false, do_region = false,
exit_bbs = (nil)), line 6124 in "tree-ssa-sccvn.c"
[30] do_rpo_vn(fn = 0xf9fd5618, entry = 0xf9aedb60, exit_bbs = (nil), iterate
= true, eliminate = false), line 6405 in "tree-ssa-sccvn.c"
[31] run_rpo_vn(kind = <unknown enum member -16789756>), line 5531 in
"tree-ssa-sccvn.c"
>From gcc-bugs-return-614024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 07:42:11 2018
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-614025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 07:56:27 2018
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Subject: [Bug c/81785] Segmentation fault for signed overflow in index expression when -fwrapv is enabled
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #4)
> Looks like removing the optimization regresses c-c++-common/restrict-2.c.
Actual code generation or just the number of moved stmts?
>From gcc-bugs-return-614026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 08:01:19 2018
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
If you disable bootstrap does it work? The backtrace makes it look like memory
corruption. Maybe you can also throw valgrind on it?
>From gcc-bugs-return-614027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 08:09:08 2018
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Subject: [Bug libstdc++/87135] New: [C++17] unordered containers violate iterator validity requirements
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Bug ID: 87135
Summary: [C++17] unordered containers violate iterator validity
requirements
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Please see the sample code below.
=========================== sample code ===========================
#include <iostream>
#include <unordered_set>
template<typename S>
void print(const S& s, typename S::const_iterator& it)
{
std::cout << "size = " << s.size() << '\n';
std::cout << "bucket_count = " << s.bucket_count() << '\n';
std::cout << "load_factor = " << s.load_factor() << '\n';
std::cout << "max_load_factor = " << s.max_load_factor() << '\n';
std::cout << "size limit = " << s.bucket_count() * s.max_load_factor() <<
"\n\n";
for (std::size_t i = 0; it != s.end() && i < s.size() / 2; ++i, ++it) {
std::cout << *it << ' ';
}
std::cout << "\n\n";
}
int main()
{
std::unordered_set<int> s;
const auto max = 10;
s.reserve(max);
for (int i = 0; i < max; ++i) {
s.insert(i);
}
auto it = s.cbegin();
print(s, it);
s.insert(max);
print(s, it);
}
=========================== sample code ===========================
=========================== output ===========================
size = 10
bucket_count = 11
load_factor = 0.909091
max_load_factor = 1
size limit = 11
9 8 7 6 5
size = 11
bucket_count = 23
load_factor = 0.478261
max_load_factor = 1
size limit = 23
4 5 6 7 8
=========================== output ===========================
cf. https://wandbox.org/permlink/QhPfL6787GV8RYXV
The C++17 standard 26.2.7[unord.req]/p.15 says,
The insert and emplace members shall not affect the validity of iterators if
(N+n) <= z * B, where N is the number of elements in the container prior to
the
insert operation, n is the number of elements inserted, B is the container's
bucket count, and z is the container’s maximum load factor.
So, I think that the sample code above should never rehash.
>From gcc-bugs-return-614028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 09:01:36 2018
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Subject: [Bug tree-optimization/87132] [9 Regression] Gcc miscompiles at -O2 on valid code
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Simplified:
extern void abort (void);
int c, d;
int main()
{
int e[] = {4, 4, 4, 4, 4, 4, 4, 4, 4};
d = 8;
for (; d; d--)
for (int a = 0; a <= 8; a++)
{
c = e[1];
e[d] = 0;
}
if (c != 0)
abort ();
return 0;
}
this one is going to be interesting to fix. The issue is that we either
stop iterating too early or we over-eagerly use values from the previous
iteration when walk_non_aliased_vuses skips over e[d] = 0 when looking
for aliasing defs to e[1]. d still has the previous iteration value of 8
because we didn't yet re-visit the load of it when walking defs across
the backedge.
So this is
static void *
vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_,
bool *disambiguate_only)
{
...
/* First try to disambiguate after value-replacing in the definitions LHS.
*/
if (is_gimple_assign (def_stmt))
{
...
lhs_ops = valueize_refs_1 (lhs_ops, &valueized_anything, true);
as well as the load from e[1] in the first iteration not needing to
visit e[d] because of the not yet executable backedge and thus the
virtual PHI degenerating to the entry value.
A fix could be somehow tracking memory state changes and iterating once more
or avoiding last-iteration values in valueization (or valueization completely
when performing the walk over backedges). The latter latter is easiest,
testing that for fallout.
Index: gcc/tree-ssa-alias.c
===================================================================
--- gcc/tree-ssa-alias.c (revision 263944)
+++ gcc/tree-ssa-alias.c (working copy)
@@ -2722,7 +2722,14 @@ next:;
if (arg1 == arg0)
;
else if (! maybe_skip_until (phi, arg0, ref, arg1, cnt, visited,
- abort_on_visited, translate, data))
+ abort_on_visited,
+ /* Do not translate when walking over
+ backedges. */
+ dominated_by_p
+ (CDI_DOMINATORS,
+ gimple_bb (SSA_NAME_DEF_STMT (arg1)),
+ phi_bb)
+ ? NULL : translate, data))
return NULL_TREE;
}
>From gcc-bugs-return-614029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 09:10:12 2018
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You also might want to test the patch from PR87132.
>From gcc-bugs-return-614030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 09:49:22 2018
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From: "darko.veberic at ijs dot si" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87136] New: internal compiler error: in emit_move_insn, at expr.c:3722
Date: Wed, 29 Aug 2018 09:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87136
Bug ID: 87136
Summary: internal compiler error: in emit_move_insn, at
expr.c:3722
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: darko.veberic at ijs dot si
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Created attachment 44618
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44618&action=edit
command-line options to g++ (as invoked from a cmake makefile)
most probably our code is sub par, but the compiler should issue an error
instead of giving up. i am attaching all the relevant files: the command-line
of the g++ invocation, the cc file itself, and the compiler-produced
intermediates.
the same bug is present also in the 7.* versions, i switched my ubuntu
alternatives to gcc/g++ 8 for this reason, but it didn't help.
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Wed, 29 Aug 2018 09:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87136
--- Comment #1 from Darko Veberic <darko.veberic at ijs dot si> ---
Created attachment 44619
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44619&action=edit
the actual cc source file
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Subject: [Bug libstdc++/31413] FAIL: 22_locale/time_get/get_date/wchar_t/4.cc execution test
Date: Wed, 29 Aug 2018 10:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31413
--- Comment #28 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Aug 29 10:05:55 2018
New Revision: 263948
URL: https://gcc.gnu.org/viewcvs?rev=263948&root=gcc&view=rev
Log:
PR libstdc++/31413 fix test failure on Debian systems
Debian uses a different D_FMT string for the zh_TW.UTF-8 locale, which
caused this test to fail. Try to detect the Debian format and adjust
the input being tested.
PR libstdc++/31413
* testsuite/22_locale/time_get/get_date/wchar_t/4.cc: Check D_FMT
string for alternative format.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/22_locale/time_get/get_date/wchar_t/4.cc
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 10:06:00 -0000
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Does not fail on powerpc64-linux, even with -mlittle -mabi=elfv2 .
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Subject: [Bug libstdc++/31413] FAIL: 22_locale/time_get/get_date/wchar_t/4.cc execution test
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |FIXED
Target Milestone|--- |9.0
--- Comment #29 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I've modified the test to also work with Debian's D_FMT string.
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Wed, 29 Aug 2018 10:10:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-08-29
CC| |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Please create pre-processed source file (with -E option) and attach it.
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 10:12:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Actually, doesn't fail on powerpc64le-linux either. Well let me try some
brand spanking new tree...
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Subject: [Bug bootstrap/87130] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Wed, 29 Aug 2018 10:49:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Aug 29 10:48:50 2018
New Revision: 263950
URL: https://gcc.gnu.org/viewcvs?rev=263950&root=gcc&view=rev
Log:
Fix thinko in lto.c (PR bootstrap/87130).
2018-08-29 Martin Liska <mliska@suse.cz>
PR bootstrap/87130
* lto.c (read_cgraph_and_symbols): Fix thinko, revert
to behavior before r263887.
Modified:
trunk/gcc/lto/ChangeLog
trunk/gcc/lto/lto.c
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From: "manisandro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87137] New: [8 Regression] Non-virtual member function increases struct size
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Bug ID: 87137
Summary: [8 Regression] Non-virtual member function increases
struct size
Product: gcc
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With gcc-8.0.0 onwards, specifically commit
ab87ee8f509c0b600102195704105d4d98ec59d9, the following test case fails to
compile using either i686-w64-mingw32-g++ or x86_64-w64-mingw32-g++ (but
compiles normally using the native x86_64-linux-g++):
--- test.cpp ---
template <typename ToCheck, unsigned ExpectedSize, unsigned RealSize =
sizeof(ToCheck)>
void check_size() {
static_assert(ExpectedSize == RealSize, "Size is off!");
}
struct Foo {
unsigned u1 : 5;
unsigned u2 : 5;
unsigned u3 : 3;
unsigned u4 : 3;
unsigned u5 : 4;
unsigned u6 : 2;
unsigned u7 : 3;
unsigned u8 : 2;
unsigned u9 : 1;
unsigned u10 : 3;
// 31 bits
unsigned u11 : 2;
unsigned u12 : 2;
unsigned u13 : 2;
unsigned u14 : 6;
unsigned u15 : 7;
unsigned u16 : 1;
unsigned u17 : 1;
unsigned u18 : 1;
unsigned u19 : 1;
unsigned u20 : 1;
bool bar() const { return false; }
private:
unsigned u21 : 1;
unsigned u22 : 1;
unsigned u23 : 1;
unsigned u24 : 1;
// 59 bits
};
int main(int argc, char* argv[]) {
check_size<Foo, 8>();
return 0;
}
-----
$ x86_64-w64-mingw32-g++ test.cpp -o test.exe
test.cpp: In instantiation of 'void check_size() [with ToCheck = Foo; unsigned
int ExpectedSize = 8; unsigned int RealSize = 12]':
test.cpp:41:24: required from here
test.cpp:3:30: error: static assertion failed: Size is off!
static_assert(ExpectedSize == RealSize, "Size is off!");
Notice the presence of the bar member function. Without the member function,
sizeof(Foo) = 8 as expected, but with the member function, sizeof(Foo) = 12.
>From gcc-bugs-return-614039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 10:51:46 2018
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Subject: [Bug c++/87137] [8 Regression] Non-virtual member function increases struct size
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Sandro Mani <manisandro at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i686-w64-mingw32,
| |x86_64-w64-mingw32
CC| |nathan at acm dot org
--- Comment #1 from Sandro Mani <manisandro at gmail dot com> ---
CC nathan@acm.org as author of ab87ee8f509c0b600102195704105d4d98ec59d9
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Subject: [Bug bootstrap/87130] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Wed, 29 Aug 2018 10:53:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 10:53:53 2018
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
Date: Wed, 29 Aug 2018 10:53:00 -0000
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--- Comment #7 from Sandro Mani <manisandro at gmail dot com> ---
Any chance of getting the fix committed?
>From gcc-bugs-return-614042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:07:54 2018
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Subject: [Bug rtl-optimization/87138] New: [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Wed, 29 Aug 2018 11:07:00 -0000
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Bug ID: 87138
Summary: [8/9 Regression] wrong code with TI multiplication
with -O -march=k8 -fno-tree-fre -mavx512bw
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 44620
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44620&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc -O -march=k8 -fno-tree-fre -mavx512bw testcase.c
$ sde64 -- ./a.out
Aborted
The difference between broken a good assembler is:
movabs rax, 9223372036854775805 # tmp167,
- mov rdx, -2 #,
+ mov rdx, 1 #,
mov QWORD PTR [rsp], rax # %sfpD.2961, tmp167
mov QWORD PTR [rsp+8], rdx # %sfpD.2961,
For some reason, 3 * 0x7FFFFFFFFFFFFFFF is computed as
0xfffffffffffffffe7ffffffffffffffd instead of 0x17ffffffffffffffd.
The wrong value first appears in the .cse1 dump.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-263946-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-263946-checking-yes-rtl-df-extra-amd64
Thread model: posix
gcc version 9.0.0 20180829 (experimental) (GCC)
>From gcc-bugs-return-614043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:16:18 2018
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Subject: [Bug middle-end/86540] [9 Regression] pr77445-2.c and ssa-dom-thread-7.c regressions since May 20, 2018
Date: Wed, 29 Aug 2018 11:16:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, so after I installed quite some switch related patches these still remain:
1) pr77445-2.c:
grep 'not considered' pr77*
pr77445-2.c.175t.thread3:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
pr77445-2.c.175t.thread3:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
pr77445-2.c.175t.thread3:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
pr77445-2.c.178t.thread4:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
pr77445-2.c.178t.thread4:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
pr77445-2.c.178t.thread4:FSM jump-thread path not considered: the number of
basic blocks on the path exceeds PARAM_MAX_FSM_THREAD_LENGTH.
2) ssa-dom-thread-7.c
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-7.c scan-tree-dump-not vrp2 "Jumps
threaded"
Jeff can you please investigate that and eventually adjust test-case if
possible?
>From gcc-bugs-return-614044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:25:33 2018
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Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
How could a cost adjustment be a right fix to a wrong-code bug? That seems
just to make it latent.
>From gcc-bugs-return-614045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:31:18 2018
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Subject: [Bug c++/87137] [8 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 11:31:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
What changelog does that has refer to? (I don;t use the git repo)
>From gcc-bugs-return-614047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:32:30 2018
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Subject: [Bug c++/87137] [8 Regression] Non-virtual member function increases struct size
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--- Comment #3 from Sandro Mani <manisandro at gmail dot com> ---
See
https://github.com/gcc-mirror/gcc/commit/ab87ee8f509c0b600102195704105d4d98ec59d9
>From gcc-bugs-return-614046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:32:20 2018
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From: "cbcode at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87139] New: 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
Date: Wed, 29 Aug 2018 11:32:00 -0000
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Bug ID: 87139
Summary: 6.4 x86_64 incorrect code generation with -O3 around
_addcarry_u64
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: cbcode at gmail dot com
Target Milestone: ---
x86_64 gcc-6 (tested with 6.4.0 and 6.3.0 under linux and 6.4.0 under
windows/mingw) generates incorrect code when optimizing with -O3 in certain
situations around _addcarry_u64. gcc-6 with -O2 is fine. gcc-5, gcc-7 and gcc-8
with -O3 are all fine. It is difficult to pinpoint the exact problem but the
following should narrow it down enough to be helpful.
#include <array>
#include <cassert>
#include <cstdint>
#include <cstdio>
#include <x86intrin.h>
using std::size_t;
using std::uint64_t;
static_assert(sizeof(size_t) == sizeof(uint64_t), "");
//big-integer multiplication, limb-size is size_t is uint64_t
template<size_t Na, size_t Nb>
std::array<size_t, Na + Nb> big_mul(std::array<size_t, Na> const& aa,
std::array<size_t, Nb> const& bb) noexcept {
static constexpr size_t const Nc = Na + Nb;
std::array<size_t, Nc> cc = {{0,}};
for (size_t na = 0; na != Na; ++na) {
for (size_t nb = 0; nb != Nb; ++nb) {
alignas(__uint128_t) size_t lohi[2];
reinterpret_cast<__uint128_t&>(lohi) = __uint128_t(aa[na]) *
__uint128_t(bb[nb]); //Note: placement-new instead of reinterpret_cast makes no
difference
size_t n = na + nb;
unsigned char c = __builtin_add_overflow(cc[n], lohi[0], &cc[n]);
#if 1 //Note: x86_64-gcc-6 -O3 generates bad code; gcc-6 -O2 is fine; gcc-5 and
gcc-7 and above are fine
c = _addcarry_u64(c, cc[n + 1], lohi[1], &reinterpret_cast<unsigned
long long&>(cc[n + 1]));
for (n += 2; n <= Nc - 1; ++n) c = __builtin_add_overflow(cc[n], c,
&cc[n]);
#elif 1 //Note: added 'c &&' in for-loop condition: problem goes away
c = _addcarry_u64(c, cc[n + 1], lohi[1], &reinterpret_cast<unsigned
long long&>(cc[n + 1]));
for (n += 2; c && n <= Nc - 1; ++n) c =
__builtin_add_overflow(cc[n], c, &cc[n]);
#else //Note: inserted '++n' between add_overflow and add_carry: problem goes
away
++n;
c = _addcarry_u64(c, cc[n], lohi[1], &reinterpret_cast<unsigned
long long&>(cc[n]));
for (++n; c && n <= Nc - 1; ++n) c = __builtin_add_overflow(cc[n],
c, &cc[n]);
#endif
}
}
return cc;
}
//simple random-number-generator,
https://github.com/svaarala/duktape/blob/master/misc/splitmix64.c
static uint64_t rnd_state = 1;
static inline uint64_t rnd() {
uint64_t z = rnd_state += 0x9e3779b97f4a7c15;
z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
z = (z ^ (z >> 27)) * 0x94d049bb133111eb;
return z ^ (z >> 31);
}
//main() writes python3-script; pipe into python3; no output means no error
//g++-6 -std=c++11 -O3 -o test test.cpp && ./test 100 | python3 #bad
//g++-6 -std=c++11 -O2 -o test test.cpp && ./test 100 | python3 #Ok
//g++-5 -std=c++11 -O3 -o test test.cpp && ./test 100 | python3 #Ok
//g++-7 -std=c++11 -O3 -o test test.cpp && ./test 100 | python3 #Ok
//g++-8 -std=c++11 -O3 -o test test.cpp && ./test 100 | python3 #Ok
int main(int argc, char const** argv) { assert(argc == 2);
size_t const M = size_t(std::strtoull(argv[1], nullptr, 0));
static constexpr size_t const Na = 2, Nb = 2; //Note: any combination of
Na>=2, Nb>=2 causes the problem
std::array<size_t, Na > aa;
std::array<size_t, Nb > bb;
std::array<size_t, Na + Nb> cc;
for (size_t m = 0; m != M; ++m) {
for (size_t& a: aa) a = rnd();
for (size_t& b: bb) b = rnd();
cc = big_mul(aa, bb);
std::printf( "a=0x");for (size_t n = Na; n--;)
std::printf("%016zx", aa[n]);
std::printf("; b=0x");for (size_t n = Nb; n--;)
std::printf("%016zx", bb[n]);
std::printf("; c=0x");for (size_t n = Na+Nb; n--;)
std::printf("%016zx", cc[n]);
std::printf("\nif a*b!=c: print(hex(a),'*',
hex(b),'\\n=',hex(a*b),'\\n?',hex(c))\n");
}
return 0;
}
>From gcc-bugs-return-614048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:53:55 2018
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Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
Date: Wed, 29 Aug 2018 11:53:00 -0000
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--- Comment #4 from Vlad Lazar <vlad.lazar at arm dot com> ---
That's right. It's not the right fix. The actual cause is the use of wi::add in
r263591, which does not set the flag in case of underflow. The correct way is
to use wi::add for addition and wi::sub for substraction. I'm testing a patch
which does that.
>From gcc-bugs-return-614049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 11:59:35 2018
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 11:59:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-29
Known to work| |7.3.0
Summary|[8 Regression] Non-virtual |[8/9 Regression]
|member function increases |Non-virtual member function
|struct size |increases struct size
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's r250413
Confirmed
>From gcc-bugs-return-614050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:07:33 2018
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Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Component|c |target
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you attach the testcases? cut&pasting has whitespace issues.
It may be an aliasing issue so try -fno-strict-aliasing.
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Subject: [Bug rtl-optimization/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |8.3
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Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Like:
--- gcc/expmed.c.jj 2018-08-26 22:42:22.526779583 +0200
+++ gcc/expmed.c 2018-08-29 14:04:32.669509929 +0200
@@ -6239,7 +6239,9 @@ canonicalize_comparison (machine_mode mo
wrapping around in the case of unsigned values. If any occur
cancel the optimization. */
wi::overflow_type overflow = wi::OVF_NONE;
- wide_int imm_modif = wi::add (imm_val, to_add, sgn, &overflow);
+ wide_int imm_modif
+ = (to_add > 0 ? wi::add (imm_val, 1, sgn, &overflow)
+ : wi::sub (imm_val, 1, sgn, &overflow));
if (overflow)
return;
If so, please submit it as soon as possible, leaving such important wrong-code
bug for so long is highly undesirable.
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Subject: [Bug c++/45113] absent or confusing diagnostics of invalid template argument list in implicit template class instantiation
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----------------------------------------------------------------------------
Last reconfirmed|2017-08-17 00:00:00 |2018-8-29
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The first example was fixed for GCC 4.8.0
The second started saying "template argument 1 is invalid" in GCC 4.8.0 and
stopped also saying "invalid type in declaration" for GCC 5.1.0
The caret locations for "template argument 1" are poor though, they point to
the end of the template argument list.
For the second and third ones Clang gives a nicer diagnostic:
45113.cc:2:15: error: type-id cannot have a name
typedef U<int x,int y> A;
^
45113.cc:2:21: error: type-id cannot have a name
typedef U<int x,int y> A;
^
2 errors generated.
That's accurate and helpful. We could even add a fix-it to remove those names.
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 12:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI, wrong-code
Target Milestone|--- |8.3
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Wed, 29 Aug 2018 12:13:00 -0000
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--- Comment #14 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Richard Biener from comment #10)
> Didn't check ubsan bootstrap.
I did. It seems to work at the -O2 level.
-O3 level hasn't worked for months, but that's an old problem.
ints and longs not wide enough types.
Using a non-gcc compiler, for example clang, at the start
seems to break the ubsan bootstrap.
Would it be worth me sending in another bug report or just posting
it here ?
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
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--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 29 Aug 2018, dcb314 at hotmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87117
>
> --- Comment #14 from David Binderman <dcb314 at hotmail dot com> ---
> (In reply to Richard Biener from comment #10)
> > Didn't check ubsan bootstrap.
>
> I did. It seems to work at the -O2 level.
>
> -O3 level hasn't worked for months, but that's an old problem.
> ints and longs not wide enough types.
>
> Using a non-gcc compiler, for example clang, at the start
> seems to break the ubsan bootstrap.
>
> Would it be worth me sending in another bug report or just posting
> it here ?
Please in another bug, not here.
>From gcc-bugs-return-614057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:28:33 2018
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Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Aug 29 12:27:55 2018
New Revision: 263953
URL: https://gcc.gnu.org/viewcvs?rev=263953&root=gcc&view=rev
Log:
PR c++/87122
* pt.c (tsubst_expr) <case RANGE_FOR_STMT>: If
processing_template_decl and decl is structured binding decl, call
cp_finish_decomp.
* g++.dg/cpp1z/decomp47.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/decomp47.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
Date: Wed, 29 Aug 2018 12:32:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Aug 29 12:32:13 2018
New Revision: 263954
URL: https://gcc.gnu.org/viewcvs?rev=263954&root=gcc&view=rev
Log:
PR c++/87122
* pt.c (tsubst_expr) <case RANGE_FOR_STMT>: If
processing_template_decl and decl is structured binding decl, call
cp_finish_decomp.
* g++.dg/cpp1z/decomp47.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp1z/decomp47.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/57170] Diagnostic for a negative case when switching over unsigned comes from -Wsign-conversion instead of -Wpedantic or -Wnarrowing
Date: Wed, 29 Aug 2018 12:35:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It should be an error, not a warning. For other narrowing conversions involving
constants we do actually use -Wnarrowing (but still defaulting to an error) so
I guess my last comment was wrong.
Or it could just be an unconditional error. Or a permerror, so -fpermissive
would allow it.
The code that handles this is in gcc/c-family/c-common.c so isn't C++-specific.
I'm not sure if that code has enough context to know if the conversion happens
in a constant expression where narrowing conversions are disallowed.
#0 unsafe_conversion_p (loc=<optimized out>, loc@entry=267203,
type=type@entry=0x7ffff013c690, expr=expr@entry=0x7ffff01401f8,
result=result@entry=0x7ffff0140048, produce_warns=produce_warns@entry=true) at
/home/jwakely/src/gcc/gcc/gcc/c-family/c-common.c:1261
#1 0x00000000008cdb27 in conversion_warning (loc=267203,
type=type@entry=0x7ffff013c690, expr=expr@entry=0x7ffff01401f8,
result=result@entry=0x7ffff0140048) at
/home/jwakely/src/gcc/gcc/gcc/c-family/c-warn.c:1127
#2 0x00000000008d11d1 in warnings_for_convert_and_check (loc=<optimized out>,
loc@entry=267203, type=type@entry=0x7ffff013c690,
expr=expr@entry=0x7ffff01401f8, result=result@entry=0x7ffff0140048) at
/home/jwakely/src/gcc/gcc/gcc/c-family/c-warn.c:1278
#3 0x000000000085df41 in convert_and_check (loc=loc@entry=267203,
type=type@entry=0x7ffff013c690, expr=0x7ffff01401f8) at
/home/jwakely/src/gcc/gcc/gcc/c-family/c-common.c:1548
#4 0x0000000000886a55 in c_add_case_label (loc=loc@entry=267203,
cases=0x24ad5e0, cond=cond@entry=0x7ffff7ff6cf0,
orig_type=orig_type@entry=0x7ffff013c690, low_value=<optimized out>,
low_value@entry=0x7ffff01401f8, high_value=<optimized out>,
high_value@entry=0x0, outside_range_p=0x24abff0)
at /home/jwakely/src/gcc/gcc/gcc/c-family/c-common.c:4780
#5 0x000000000066b1fa in finish_case_label (loc=267203, low_value=<optimized
out>, low_value@entry=0x7ffff01401f8, high_value=<optimized out>) at
/home/jwakely/src/gcc/gcc/gcc/cp/decl.c:3669
#6 0x00000000007309e9 in cp_parser_label_for_labeled_statement
(parser=parser@entry=0x7ffff7ff6ab0, attributes=attributes@entry=0x0) at
/home/jwakely/src/gcc/gcc/gcc/cp/parser.c:11072
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Subject: [Bug other/86726] Undocumented option -f{,no}-tree-scev-cprop
Date: Wed, 29 Aug 2018 12:39:00 -0000
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Author: amonakov
Date: Wed Aug 29 12:39:12 2018
New Revision: 263955
URL: https://gcc.gnu.org/viewcvs?rev=263955&root=gcc&view=rev
Log:
doc: document -ftree-scev-cprop
PR other/86726
* invoke.texi (Optimization Options): List -ftree-scev-cprop.
(-O): Ditto.
(-ftree-scev-cprop): Document.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug other/86726] Undocumented option -f{,no}-tree-scev-cprop
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |amonakov at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Fixed, thanks.
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 12:40:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-614063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:47:51 2018
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
Date: Wed, 29 Aug 2018 12:47:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-29
Ever confirmed|0 |1
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
A patch was posted at
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00559.html
>From gcc-bugs-return-614064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:49:32 2018
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
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--- Comment #9 from Sandro Mani <manisandro at gmail dot com> ---
Thanks
--- Comment #10 from Sandro Mani <manisandro at gmail dot com> ---
Thanks
>From gcc-bugs-return-614065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:49:33 2018
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
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--- Comment #9 from Sandro Mani <manisandro at gmail dot com> ---
Thanks
--- Comment #10 from Sandro Mani <manisandro at gmail dot com> ---
Thanks
>From gcc-bugs-return-614066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 12:58:45 2018
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Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
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cbcode at gmail dot com changed:
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CC| |cbcode at gmail dot com
--- Comment #2 from cbcode at gmail dot com ---
Created attachment 44621
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44621&action=edit
test reproducing the problem
>From gcc-bugs-return-614067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 13:00:01 2018
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Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
Date: Wed, 29 Aug 2018 13:00:00 -0000
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--- Comment #3 from cbcode at gmail dot com ---
-fno-strict-aliasing makes no difference.
>From gcc-bugs-return-614068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 13:05:35 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 13:05:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
... Nope, works fine with trunk as well. You must be doing something you're
not telling us?
>From gcc-bugs-return-614069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 13:38:10 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 13:38:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
ubsan build helps:
$ UBSAN_OPTIONS=print_stacktrace=1 ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90
-frounding-math
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:5:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Loop variable at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:8:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Start expression in DO loop at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:13:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: End expression in DO loop at (1) must be integer
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:19:
13 | do x = 1.0, 2.05, 0.1
| 1
Warning: Deleted feature: Step expression in DO loop at (1) must be integer
/home/marxin/Programming/gcc/gcc/function.c:2046:22: runtime error: member
access within null pointer of type 'const union tree_node'
#0 0x15140fc in aggregate_value_p(tree_node const*, tree_node const*)
/home/marxin/Programming/gcc/gcc/function.c:2046
#1 0xf3d2df in emit_library_call_value_1(int, rtx_def*, rtx_def*,
libcall_type, machine_mode, int, std::pair<rtx_def*, machine_mode>*)
/home/marxin/Programming/gcc/gcc/calls.c:4745
#2 0x136c556 in emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, rtx_def*, machine_mode)
/home/marxin/Programming/gcc/gcc/rtl.h:4185
#3 0x13b3a79 in convert_mode_scalar
/home/marxin/Programming/gcc/gcc/expr.c:329
#4 0x13b2da3 in convert_move(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:271
#5 0x13ba344 in convert_modes(machine_mode, machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:712
#6 0x13b86da in convert_to_mode(machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:637
#7 0x1c27737 in expand_fix(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/optabs.c:4930
#8 0x1405267 in expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier) /home/marxin/Programming/gcc/gcc/expr.c:8961
#9 0xf8e552 in expand_gimple_stmt_1
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3673
#10 0xf8ea99 in expand_gimple_stmt
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3734
#11 0xfa3f58 in expand_gimple_basic_block
/home/marxin/Programming/gcc/gcc/cfgexpand.c:5770
#12 0xfa88da in execute /home/marxin/Programming/gcc/gcc/cfgexpand.c:6373
#13 0x1d1578c in execute_one_pass(opt_pass*)
/home/marxin/Programming/gcc/gcc/passes.c:2446
#14 0x1d1611d in execute_pass_list_1
/home/marxin/Programming/gcc/gcc/passes.c:2535
#15 0x1d16271 in execute_pass_list(function*, opt_pass*)
/home/marxin/Programming/gcc/gcc/passes.c:2546
#16 0x10a13e2 in cgraph_node::expand()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2121
#17 0x10a3a15 in output_in_order
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2365
#18 0x10a5433 in symbol_table::compile()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2609
#19 0x10a5ea6 in symbol_table::finalize_compilation_unit()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2788
#20 0x20dd5b5 in compile_file /home/marxin/Programming/gcc/gcc/toplev.c:480
#21 0x20e4820 in do_compile /home/marxin/Programming/gcc/gcc/toplev.c:2170
#22 0x20e4e4f in toplev::main(int, char**)
/home/marxin/Programming/gcc/gcc/toplev.c:2305
#23 0x3aec680 in main /home/marxin/Programming/gcc/gcc/main.c:39
#24 0x7ffff5ea1fea in __libc_start_main ../csu/libc-start.c:308
#25 0x812bc9 in _start (/dev/shm/objdir2/gcc/f951+0x812bc9)
during RTL pass: expand
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/real_do_1.f90:13:0:
13 | do x = 1.0, 2.05, 0.1
|
internal compiler error: Segmentation fault
0x20dc92f crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff5eb710f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x15140fd aggregate_value_p(tree_node const*, tree_node const*)
/home/marxin/Programming/gcc/gcc/function.c:2046
0xf3d2df emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
/home/marxin/Programming/gcc/gcc/calls.c:4745
0x136c556 emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, rtx_def*, machine_mode)
/home/marxin/Programming/gcc/gcc/rtl.h:4185
0x13b3a79 convert_mode_scalar
/home/marxin/Programming/gcc/gcc/expr.c:329
0x13b2da3 convert_move(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:271
0x13ba344 convert_modes(machine_mode, machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:712
0x13b86da convert_to_mode(machine_mode, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/expr.c:637
0x1c27737 expand_fix(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/optabs.c:4930
0x1405267 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/home/marxin/Programming/gcc/gcc/expr.c:8961
0xf8e552 expand_gimple_stmt_1
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3673
0xf8ea99 expand_gimple_stmt
/home/marxin/Programming/gcc/gcc/cfgexpand.c:3734
0xfa3f58 expand_gimple_basic_block
/home/marxin/Programming/gcc/gcc/cfgexpand.c:5770
0xfa88da execute
/home/marxin/Programming/gcc/gcc/cfgexpand.c:6373
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 13:39:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
In calls.c I see:
│4742 if (outmode != VOIDmode)
│4743 {
│4744 tfom = lang_hooks.types.type_for_mode (outmode, 0);
>│4745 if (aggregate_value_p (tfom, 0))
(gdb) p tfom
$2 = <tree 0x0>
(gdb) p outmode
$3 = E_KFmode
Would it help?
>From gcc-bugs-return-614071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 13:49:08 2018
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 13:49:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Backtrace from GDB with function arguments visible:
#0 0x00000000015140fd in aggregate_value_p (exp=0x0, fntype=0x0) at
/home/marxin/Programming/gcc/gcc/function.c:2046
#1 0x0000000000f3d2e0 in emit_library_call_value_1 (retval=1,
orgfun=0x7ffff5834210, value=0x0, fn_type=LCT_CONST, outmode=E_KFmode, nargs=1,
args=0x7fffffffc0d0) at /home/marxin/Programming/gcc/gcc/calls.c:4745
#2 0x000000000136c557 in emit_library_call_value (fun=0x7ffff5834210,
value=0x0, fn_type=LCT_CONST, outmode=E_KFmode, arg1=0x7ffff5912ea0,
arg1_mode=E_SFmode) at /home/marxin/Programming/gcc/gcc/rtl.h:4185
#3 0x00000000013b3a7a in convert_mode_scalar (to=0x7ffff5917558,
from=0x7ffff5912ea0, unsignedp=0) at
/home/marxin/Programming/gcc/gcc/expr.c:329
#4 0x00000000013b2da4 in convert_move (to=0x7ffff5917558, from=0x7ffff5912ea0,
unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:271
#5 0x00000000013ba345 in convert_modes (mode=E_KFmode, oldmode=E_SFmode,
x=0x7ffff5912ea0, unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:712
#6 0x00000000013b86db in convert_to_mode (mode=E_KFmode, x=0x7ffff5912ea0,
unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:637
#7 0x0000000001c27738 in expand_fix (to=0x7ffff5912f30, from=0x7ffff5912ea0,
unsignedp=1) at /home/marxin/Programming/gcc/gcc/optabs.c:4930
#8 0x0000000001405268 in expand_expr_real_2 (ops=0x7fffffffd1e0,
target=0x7ffff5912f30, tmode=E_DImode, modifier=EXPAND_NORMAL) at
/home/marxin/Programming/gcc/gcc/expr.c:8961
#9 0x0000000000f8e553 in expand_gimple_stmt_1 (stmt=<gimple_assign
0x7ffff59090f0>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3673
#10 0x0000000000f8ea9a in expand_gimple_stmt (stmt=<gimple_assign
0x7ffff59090f0>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3734
#11 0x0000000000fa3f59 in expand_gimple_basic_block (bb=<basic_block
0x7ffff5831138 (2)>, disable_tail_calls=false) at
/home/marxin/Programming/gcc/gcc/cfgexpand.c:5770
#12 0x0000000000fa88db in (anonymous namespace)::pass_expand::execute
(this=0x6e6f770, fun=0x7ffff5903000) at
/home/marxin/Programming/gcc/gcc/cfgexpand.c:6373
#13 0x0000000001d1578d in execute_one_pass (pass=<opt_pass* 0x6e6f770
"expand"(235)>) at /home/marxin/Programming/gcc/gcc/passes.c:2446
#14 0x0000000001d1611e in execute_pass_list_1 (pass=<opt_pass* 0x6e6f770
"expand"(235)>) at /home/marxin/Programming/gcc/gcc/passes.c:2535
#15 0x0000000001d16272 in execute_pass_list (fn=0x7ffff5903000, pass=<opt_pass*
0x6e6bb20 "fixup_cfg"(88)>) at /home/marxin/Programming/gcc/gcc/passes.c:2546
#16 0x00000000010a13e3 in cgraph_node::expand (this=<cgraph_node * const
0x7ffff580b420 "real_do_1"/1>) at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2121
#17 0x00000000010a3a16 in output_in_order () at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2365
#18 0x00000000010a5434 in symbol_table::compile (this=0x7ffff580d000) at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2609
#19 0x00000000010a5ea7 in symbol_table::finalize_compilation_unit
(this=0x7ffff580d000) at /home/marxin/Programming/gcc/gcc/cgraphunit.c:2788
#20 0x00000000020dd5b6 in compile_file () at
/home/marxin/Programming/gcc/gcc/toplev.c:480
#21 0x00000000020e4821 in do_compile () at
/home/marxin/Programming/gcc/gcc/toplev.c:2170
#22 0x00000000020e4e50 in toplev::main (this=0x7fffffffd98e, argc=12,
argv=0x7fffffffda88) at /home/marxin/Programming/gcc/gcc/toplev.c:2305
#23 0x0000000003aec681 in main (argc=12, argv=0x7fffffffda88) at
/home/marxin/Programming/gcc/gcc/main.c:39
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Subject: [Bug c++/85110] Missing underlines for some bad arguments
Date: Wed, 29 Aug 2018 13:53:00 -0000
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Wed Aug 29 13:52:22 2018
New Revision: 263957
URL: https://gcc.gnu.org/viewcvs?rev=263957&root=gcc&view=rev
Log:
C++: underline param in print_conversion_rejection (more PR c++/85110)
Consider this bogus code (from g++.dg/diagnostic/param-type-mismatch-2.C):
struct s4 { static int member_1 (int one, const char **two, float three); };
int test_4 (int first, const char *second, float third)
{
return s4::member_1 (first, second, third);
}
Before this patch, g++ emits:
demo.cc: In function 'int test_4(int, const char*, float)':
demo.cc:5:44: error: no matching function for call to 's4::member_1(int&, const
char*&, float&)'
5 | return s4::member_1 (first, second, third);
| ^
demo.cc:1:24: note: candidate: 'static int s4::member_1(int, const char**,
float)'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ^~~~~~~~
demo.cc:1:24: note: no known conversion for argument 2 from 'const char*' to
'const char**'
With this patch, it highlights the pertinent parameter in the
"no known conversion" note:
demo.cc: In function 'int test_4(int, const char*, float)':
demo.cc:5:44: error: no matching function for call to 's4::member_1(int&, const
char*&, float&)'
5 | return s4::member_1 (first, second, third);
| ^
demo.cc:1:24: note: candidate: 'static int s4::member_1(int, const char**,
float)'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ^~~~~~~~
demo.cc:1:56: note: no known conversion for argument 2 from 'const char*' to
'const char**'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ~~~~~~~~~~~~~^~~
gcc/cp/ChangeLog:
PR c++/85110
* call.c (print_conversion_rejection): Add "fn" param and use it
for "no known conversion" messages to underline the pertinent
param.
(print_z_candidate): Supply "fn" to the new param above.
gcc/testsuite/ChangeLog:
PR c++/85110
* g++.dg/diagnostic/param-type-mismatch-2.C: Update expected
output to reflect underlining of pertinent parameter in decl
for "no known conversion" messages.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/diagnostic/param-type-mismatch-2.C
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 14:04:00 -0000
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
what should the layout of the following be?
struct Foo {
unsigned one : 24;
static int var;
unsigned two : 4;
};
is this size 8 or 4?
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Subject: [Bug tree-optimization/87132] [9 Regression] Gcc miscompiles at -O2 on valid code
Date: Wed, 29 Aug 2018 14:13:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Aug 29 14:13:20 2018
New Revision: 263959
URL: https://gcc.gnu.org/viewcvs?rev=263959&root=gcc&view=rev
Log:
2018-08-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/87132
* tree-ssa-alias.c (get_continuation_for_phi): Do not translate
when skipping defs reachable over backedges.
* gcc.dg/torture/pr87132.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87132.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-alias.c
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From: "silvestri at diag dot uniroma1.it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/87140] New: Segmentation fault in priority_list_upgrade_task function when execution tasks with priority
Date: Wed, 29 Aug 2018 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87140
Bug ID: 87140
Summary: Segmentation fault in priority_list_upgrade_task
function when execution tasks with priority
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: silvestri at diag dot uniroma1.it
CC: jakub at gcc dot gnu.org
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Created attachment 44622
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44622&action=edit
Program to test BUG FIX
Hello,
in GOMP_taskwait function within task.c at line 1352, the following code leads
to SIGSEV when executing tasks with priority:
struct gomp_task *next_task = priority_queue_next_task (PQ_CHILDREN,
&task->children_queue, PQ_TEAM, &team->task_queue, &child_q);
This is possible because priority_queue_next_task function may return a
non-child task instead of a child task every time both team queue and children
queue return GOMP_TASK_WAITING tasks, and the non-child task has greater
priority value. Since it's impossible to rearrange a non-child task order in
children queue, the segmentation fault occurs in priority_list_upgrade_task
funtion.
The libgomp implementation uses TIED tasks by default and the aforementioned
behaviour leads also to violate TSC2.
The proposed fix is the following:
struct gomp_task *next_task = priority_queue_next_task (PQ_CHILDREN,
&task->children_queue, PQ_IGNORED, NULL, &child_q);
In the attachment a program to test libgomp before and after the proposed fix.
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Wed, 29 Aug 2018 14:33:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-29
CC| |jakub at redhat dot com
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It was caused by r250397.
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 14:34:00 -0000
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--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Created attachment 44623
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44623&action=edit
patch
This patch appears to fix the problem It'd be good to (a) confirms it also
passes on MS's compiler
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
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--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Created attachment 44624
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44624&action=edit
this is the testcase
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87132] [9 Regression] Gcc miscompiles at -O2 on valid code
Date: Wed, 29 Aug 2018 14:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 14:47:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It compiles successfully with MSVC https://godbolt.org/z/Cw-yiW
>From gcc-bugs-return-614081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 14:51:48 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
Date: Wed, 29 Aug 2018 14:51:00 -0000
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----------------------------------------------------------------------------
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to cbcode from comment #2)
> Created attachment 44621 [details]
> test reproducing the problem
How to show the problem?
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From: "mfe at live dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87141] New: configure:14586: error: Could not determine word size.
Date: Wed, 29 Aug 2018 14:57:00 -0000
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Bug ID: 87141
Summary: configure:14586: error: Could not determine word size.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: mfe at live dot de
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Created attachment 44625
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44625&action=edit
config
he exact version of GCC:
gcc-8.2.0
the system type:
NetgearReadyNAS Duo
(http://wiki.dietpc.org/index.php/DIET-PC_on_SPARC_ReadyNAS)
the options given when GCC was configured/built:
../gcc-8.2.0/configure --prefix=/opt/gcc-8.2/ --enable-languages=c,c++,go
--with-mpc=/usr/local --with-mpfr=/usr/local --with-gmp=/usr/local
--with-isl=/usr/local/ --disable-doc --host=sparc-linux --build=sparc-linux
--disable-libstdcxx-pch --disable-linux-futex --disable-libsanitizer
--disable-libcilkrts --disable-libitm --disable-libitm CC=/opt/gcc-7.3/bin/gcc
CXX=/opt/gcc-7.3/bin/g++ && /usr/local/bin/make
## --------- ##
## Platform. ##
## --------- ##
hostname = nas-02-90-38
uname -m = padre
uname -r = 2.6.17.14ReadyNAS
uname -s = Linux
uname -v = #1 Wed Jun 20 20:08:20 PDT 2012
the complete command line that triggers the bug (stage3);
/usr/local/bin/make
the compiler output (error messages, warnings, etc.);
[...]
checking if /media/gcc-8.2.0-compiled/./gcc/xgcc
-B/media/gcc-8.2.0-compiled/./gcc/ -B/opt/gcc-8.2/sparc-linux/bin/
-B/opt/gcc-8.2/sparc-linux/lib/ -isystem /opt/gcc-8.2/sparc-linux/include
-isystem /opt/gcc-8.2/sparc-linux/sys-include supports -c -o file.o...
(cached) yes
checking whether the /media/gcc-8.2.0-compiled/./gcc/xgcc
-B/media/gcc-8.2.0-compiled/./gcc/ -B/opt/gcc-8.2/sparc-linux/bin/
-B/opt/gcc-8.2/sparc-linux/lib/ -isystem /opt/gcc-8.2/sparc-linux/include
-isystem /opt/gcc-8.2/sparc-linux/sys-include linker
(/media/gcc-8.2.0-compiled/./gcc/collect-ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking whether to enable maintainer-specific portions of Makefiles... no
checking for thread model used by GCC... posix
checking for ANSI C header files... (cached) yes
checking whether string.h and strings.h may both be included... yes
looking for a compliant stdint.h in stdint.h, checking for uintmax_t... yes
checking for uintptr_t... yes
checking for int_least32_t... yes
checking for int_fast32_t... yes
checking for uint64_t... yes
checking what to include in gstdint.h... stdint.h (already complete)
checking fenv.h usability... yes
checking fenv.h presence... yes
checking for fenv.h... yes
checking for 1 byte integer... yes
checking for 2 byte integer... yes
checking for 4 byte integer... yes
checking for 8 byte integer... yes
checking for 16 byte integer... no
checking for __atomic_load/store for size 1... yes
checking for __atomic_load/store for size 2... yes
checking for __atomic_load/store for size 4... yes
checking for __atomic_load/store for size 8... yes
checking for __atomic_load/store for size 16... no
checking for __atomic_test_and_set for size 1... yes
checking for __atomic_test_and_set for size 2... yes
checking for __atomic_test_and_set for size 4... yes
checking for __atomic_test_and_set for size 8... yes
checking for __atomic_test_and_set for size 16... no
checking for __atomic_exchange for size 1... yes
checking for __atomic_exchange for size 2... yes
checking for __atomic_exchange for size 4... yes
checking for __atomic_exchange for size 8... no
checking for __atomic_exchange for size 16... no
checking for __atomic_compare_exchange for size 1... yes
checking for __atomic_compare_exchange for size 2... yes
checking for __atomic_compare_exchange for size 4... yes
checking for __atomic_compare_exchange for size 8... no
checking for __atomic_compare_exchange for size 16... no
checking for __atomic_fetch_add for size 1... yes
checking for __atomic_fetch_add for size 2... yes
checking for __atomic_fetch_add for size 4... yes
checking for __atomic_fetch_add for size 8... no
checking for __atomic_fetch_add for size 16... no
checking for __atomic_fetch_op for size 1... yes
checking for __atomic_fetch_op for size 2... yes
checking for __atomic_fetch_op for size 4... yes
checking for __atomic_fetch_op for size 8... no
checking for __atomic_fetch_op for size 16... no
checking whether byte ordering is bigendian... yes
checking for the word size... configure: error: Could not determine word size.
make[1]: *** [Makefile:22655: configure-target-libatomic] Error 1
make[1]: Leaving directory '/c/media/gcc-8.2.0-compiled'
make: *** [Makefile:943: all] Error 2
Not sure if its related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87013
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 15:29:00 -0000
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--- Comment #9 from Liu Hao <lh_mouse at 126 dot com> ---
(In reply to Nathan Sidwell from comment #6)
> Created attachment 44623 [details]
> patch
>
> This patch appears to fix the problem It'd be good to (a) confirms it also
> passes on MS's compiler
With this patch applied, GCC 8.2.1 accepts the testcase, as well as Microsoft
CL 19.15.26726 .
>From gcc-bugs-return-614084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 15:49:03 2018
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From: "mscfd at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87142] New: Aliasing issue with overloaded assignment and allocatable components
Date: Wed, 29 Aug 2018 15:49:00 -0000
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Bug ID: 87142
Summary: Aliasing issue with overloaded assignment and
allocatable components
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The following code does not work, as the left hand side in "str = str%cs(1:10)"
is deallocated, before the right hand side, where str also appears, is
evaluated. With gfortran-7.3.0, the output looks right, but I see invalid
memory accesses in valgrind. In other circumstances, depending on the length of
the string and with 8.1.0, I have also seen wrong results, but then depending
on the optimisation level. As far as I know, this is a violation of the
standard, which requires that the right hand side is evaluated before the left
hand side is modified (i.e. in this case deallocated).
module mod
implicit none
private
type, public :: string
character(len=:), allocatable :: cs
contains
procedure, public :: assign
generic, public :: assignment(=) => assign
end type string
contains
elemental subroutine assign(self, cs)
class(string), intent(inout) :: self
character(len=*), intent(in) :: cs
! this is not working if cs and self%cs are aliasing
self%cs = cs
end subroutine assign
end module mod
program assign_alias
use mod
implicit none
type(string) :: str
str%cs = repeat('0123456789', 100)
str = str%cs(1:10)
end program assign_alias
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Wed, 29 Aug 2018 15:53:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Component|rtl-optimization |middle-end
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Subject: [Bug c++/30812] enhancement: exception specification in __PRETTY_FUNCTION__
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
A function's noexceptness is part of the type in c++11, so it might make sense
to include that.
>From gcc-bugs-return-614087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 16:17:08 2018
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From: "andrew at fluidgravity dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87143] New: Uninitialized warnings when using automatic array allocation
Date: Wed, 29 Aug 2018 16:17:00 -0000
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Bug ID: 87143
Summary: Uninitialized warnings when using automatic array
allocation
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I get the following warnings when compiling the code below:
> gfortran -Wall -std=f2008 code.f90
code.f90:5:0:
i = [0, 1, 2]
Warning: ‘i.offset’ is used uninitialized in this function [-Wuninitialized]
code.f90:5:0: Warning: ‘i.dim[0].lbound’ is used uninitialized in this function
[-Wuninitialized]
code.f90:5:0: Warning: ‘i.dim[0].ubound’ is used uninitialized in this function
[-Wuninitialized]
code.f90:5:0:
i = [0, 1, 2]
Warning: ‘i.dim[0].lbound’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
code.f90:5:0: Warning: ‘i.dim[0].ubound’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
code.f90:5:0: Warning: ‘i.dim[0].ubound’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
code.f90:5:0: Warning: ‘i.dim[0].lbound’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
> cat code.f90
PROGRAM p
IMPLICIT NONE
INTEGER, ALLOCATABLE :: i(:)
i = [0, 1, 2]
PRINT*,SIZE(i)
PRINT*,i
END PROGRAM p
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From: "cbcode at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
Date: Wed, 29 Aug 2018 16:18:00 -0000
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--- Comment #5 from cbcode at gmail dot com ---
(In reply to H.J. Lu from comment #4)
> (In reply to cbcode from comment #2)
> > Created attachment 44621 [details]
> > test reproducing the problem
>
> How to show the problem?
Save the attachment as test.cpp, compile, run and look at the output:
g++ -std=c++11 -O3 -o test test.cpp && ./test 10
function bigmul() multiplies two arbitrary-precision integers, and main()
generates a few random examples and format them as a python3-script, consisting
of lines of the form:
if a * b != expected: print a, b, expected, a * b
To run the tests, do:
g++ -std=c++11 -O3 -o test test.cpp && ./test 10 | python3
If the gcc version is not 6, or if the optimization level is below -O3, all
checks will pass and there is no output.
With the default g++ in amd64-debian-stable at the time of this writing (gcc
version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)) I get the following output:
$ g++ -std=c++11 -O3 -o test test.cpp && ./test 10 | python3
0xbeeb8da1658eec67910a2dec89025cc1 * 0x71c18690ee42c90bf893a2eefb32555e
= 0x54d64d7566d4996250f93066b9e161138d4d6f3a582b5c4f9f3bd72d705c23de
? 0x54d64d7566d4996250f93066b9e161128d4d6f3a582b5c4f9f3bd72d705c23de
0xc34d0bff9015028071bb54d8d101b5b9 * 0x85e7bb0f12278575e099ec6cd7363ca5
= 0x6627d0766096e0e087e772aabc35719b32092fcf64d348f16eb53cc1d0b77c3d
? 0x6627d0766096e0e087e772aabc35719a32092fcf64d348f16eb53cc1d0b77c3d
0xcb435c8e74616796491718de357e3da8 * 0x9afcd44d14cf8bfe6775dc7701564f61
= 0x7b0f448dcaac0546958108e31e6bff5afc779f31bc686ccf2bbb7e72984c34a8
? 0x7b0f448dcaac0546958108e31e6bff59fc779f31bc686ccf2bbb7e72984c34a8
0x87b341d690d7a28a7476cf8a4baa5dc0 * 0x2ac2ce17a5794a3b6f9b6dae6f4c57a8
= 0x16aaabe3e0298b6b287985777faad3121c5e6216bd208bf75d540032a2a9c600
? 0x16aaabe3e0298b6b287985777faad3111c5e6216bd208bf75d540032a2a9c600
0xd0bad0da572baaf1a534a6a6b7fd0b63 * 0xe263183773ef6508ae84379630af89ee
= 0xb895b85e3fa2b67d1b3b3243d7509b6b0ca8fe779ebdc9d4475c5094d105910a
? 0xb895b85e3fa2b67d1b3b3243d7509b6a0ca8fe779ebdc9d4475c5094d105910a
0x70616f2f48dce01c65ace2685a072c6d * 0x879e2e2256feff0c40d6824e2ef3fc17
= 0x3b88d20523b761dd4aec1ed139f28c4baa0e1564fccd5926707eb1ffe7d749cb
? 0x3b88d20523b761dd4aec1ed139f28c4aaa0e1564fccd5926707eb1ffe7d749cb
0xbf8c59bb003553c18b2e02445e4be0f5 * 0xab27a171be5b133cd16aa4b296eb9d18
= 0x8010671df4712da0478a910d2b8b019bd201c56c8ce38b81bf08880e6efa57f8
? 0x8010671df4712da0478a910d2b8b019ad201c56c8ce38b81bf08880e6efa57f8
7 out of 10 tests fail, there is bit flipped somewhere in the middle.
g++ -std=c++11 -O2 -o test test.cpp && ./test 10 | python3
passes all tests, as does g++ -O3 with a gcc version other than 6.x.
The problem seems to require the presence of loops (and presumably their
unrolling), and the add_overflow and add_carry need to appear next to each
other without anything in between. I was not able to narrow it down further.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Wed, 29 Aug 2018 16:28:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44626
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44626&action=edit
gcc9-pr87138.patch
That revision just uncovered a latent bug in expand_mult_const. If val_so_far
is above HOST_WIDE_INT_MAX and nmode is wider than 64-bits, it adds an
incorrect REG_EQUAL note, says the partial result is equal to const_int
0x8000000000000000, which is a negative value of (__int128) (- LONG_MAX - 1),
but it should actually use const_wide_int 0x08000000000000000 instead (or
const_double if const_wide_int isn't supported).
>From gcc-bugs-return-614090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 16:42:58 2018
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From: "vlad.lazar at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
Date: Wed, 29 Aug 2018 16:42:00 -0000
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--- Comment #6 from Vlad Lazar <vlad.lazar at arm dot com> ---
Here's the patch: https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01889.html
>From gcc-bugs-return-614092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 17:17:54 2018
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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/86711] [9 Regression] wrong folding of memchr
Date: Wed, 29 Aug 2018 17:17:00 -0000
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--- Comment #5 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Aug 29 17:17:08 2018
New Revision: 263963
URL: https://gcc.gnu.org/viewcvs?rev=263963&root=gcc&view=rev
Log:
PR tree-optimization/86714
PR tree-optimization/86711
* builtins.c (c_strlen): Add arguments to call to string_constant.
* expr.c (string_constant): Add argument. Detect missing nul
terminator and outermost declaration it's missing in.
* expr.h (string_constant): Add argument.
* fold-const.c (read_from_constant_string): Add arguments to call to
string_constant.
(c_getstr): Likewise.
* tree-ssa-forwprop.c (simplify_builtin_call): Likewise.
to string_constant.
* tree-ssa-strlen.c (get_stridx): Likewise.
PR tree-optimization/86714
PR tree-optimization/86711
* gcc.c-torture/execute/memchr-1.c: New test.
* gcc.c-torture/execute/pr86714.c: New test.
* gcc.c-torture/execute/widechar-3.c: New test.
* gcc.dg/strlenopt-58.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
trunk/gcc/testsuite/gcc.c-torture/execute/pr86714.c
trunk/gcc/testsuite/gcc.c-torture/execute/widechar-3.c
trunk/gcc/testsuite/gcc.dg/strlenopt-58.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/expr.c
trunk/gcc/expr.h
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
trunk/gcc/tree-ssa-strlen.c
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Subject: [Bug middle-end/86714] tree-ssa-forwprop.c confused by too long initializer
Date: Wed, 29 Aug 2018 17:17:00 -0000
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--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Aug 29 17:17:08 2018
New Revision: 263963
URL: https://gcc.gnu.org/viewcvs?rev=263963&root=gcc&view=rev
Log:
PR tree-optimization/86714
PR tree-optimization/86711
* builtins.c (c_strlen): Add arguments to call to string_constant.
* expr.c (string_constant): Add argument. Detect missing nul
terminator and outermost declaration it's missing in.
* expr.h (string_constant): Add argument.
* fold-const.c (read_from_constant_string): Add arguments to call to
string_constant.
(c_getstr): Likewise.
* tree-ssa-forwprop.c (simplify_builtin_call): Likewise.
to string_constant.
* tree-ssa-strlen.c (get_stridx): Likewise.
PR tree-optimization/86714
PR tree-optimization/86711
* gcc.c-torture/execute/memchr-1.c: New test.
* gcc.c-torture/execute/pr86714.c: New test.
* gcc.c-torture/execute/widechar-3.c: New test.
* gcc.dg/strlenopt-58.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
trunk/gcc/testsuite/gcc.c-torture/execute/pr86714.c
trunk/gcc/testsuite/gcc.c-torture/execute/widechar-3.c
trunk/gcc/testsuite/gcc.dg/strlenopt-58.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/expr.c
trunk/gcc/expr.h
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
trunk/gcc/tree-ssa-strlen.c
>From gcc-bugs-return-614091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 17:17:19 2018
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Subject: [Bug fortran/87143] Uninitialized warnings when using automatic array allocation
Date: Wed, 29 Aug 2018 17:17:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-08-29
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 7.3 up to trunk (9.0). I am sure there are several duplicates.
>From gcc-bugs-return-614094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 17:20:18 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Wed, 29 Aug 2018 17:20:00 -0000
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
lang_hooks.types.type_for_mode can return NULL, but emit_library_call_value
cannot handle that.
Why it fails on a cross and not natively, I don't know... target bug is
my guess.
>From gcc-bugs-return-614095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 17:28:04 2018
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From: "miltonkbenjamin at verizon dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
Date: Wed, 29 Aug 2018 17:28:00 -0000
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--- Comment #13 from miltonkbenjamin <miltonkbenjamin at verizon dot net> ---
(In reply to Jonathan Wakely from comment #12)
> (In reply to miltonkbenjamin from comment #11)
> > > C:\parser>g++ -include iostream.h -Xpreprocessor "FlexLexer.h" lex1.yy.cc
>
> You're STILL passing a filename as the argument to -Xpreprocessor.
>
> What part of my comments do you not understand?
Hi Jonathan,
I tried what you suggested, and it failed as per comment 10 here.
If you can send me an email address, I can send you the files (and
for a fee?) see if you can get it working. I installed win_flex, win_bison and
g++ on dozens of Win 7 PCS and it worked each and every time.
I currently have a Win 10 PC and it failed on 3 Win 10 PC's I have access to.
Thanks for your support,
Milt Benjamin
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 29 Aug 2018 17:37:00 -0000
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--- Comment #10 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
gcc-8 patch posted https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01900.html
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87074] [8/9 Regression] Unroll and jam bug: O3 result differ from O2
Date: Wed, 29 Aug 2018 18:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87074
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
outer->header is:
bb_4 (preds = {bb_3 bb_11 }, succs = {bb_5 })
{
<bb 4> [local count: 118111601]:
# f.10_31 = PHI <f.10_27(3), _12(11)>
# .MEM_34 = PHI <.MEM_18(D)(3), .MEM_21(11)>
# g_lsm.15_33 = PHI <g_lsm.15_13(3), _9(11)>
_75 = (unsigned int) g_lsm.15_33;
}
the bb into which the inner loop exits is:
bb_6 (preds = {bb_5 }, succs = {bb_11 bb_7 })
{
<bb 6> [local count: 118111601]:
# _11 = PHI <_8(5)>
_9 = (int) _11;
_12 = f.10_31 + 1;
if (_12 <= 10)
goto <bb 11>; [89.00%]
else
goto <bb 7>; [11.00%]
}
and outer->latch is:
bb_11 (preds = {bb_6 }, succs = {bb_4 })
{
<bb 11> [local count: 105119325]:
goto <bb 4>; [100.00%]
}
>From what I can see, gimple-loop-jam.c verifies using bb_prevents_fusion_p
these 3 bbs, but nothing checks the outer loop's IVs.
The problem is that a value computed by the inner loop (_8) is then used inside
of the outer loop and fed into the next inner loop too.
So, shall we punt if there are any phis in single_exit (loop)->dest (other than
virtual) (assuming here that we are in loop closed SSA form) and thus there are
any SSA_NAME uses from the inner loop to next outer loop's iteration?
Or are there perhaps any exceptions that can be handled, like if a value
computed by the inner loop is not used only after the outer loop exits?
>From gcc-bugs-return-614098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 19:07:59 2018
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Subject: [Bug preprocessor/87088] Attached program doesn't finish compiling and linking
Date: Wed, 29 Aug 2018 19:07:00 -0000
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There is no GCC bug here.
>From gcc-bugs-return-614099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 19:47:52 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85357] gfortran versions 7.2.0/8.0.1 reject F03 procedure overriding
Date: Wed, 29 Aug 2018 19:47:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |janus at gcc dot gnu.org
--- Comment #4 from janus at gcc dot gnu.org ---
I would argue that the code is actually invalid. A current trunk build shows:
23 | use base
| 2
....
34 | subroutine summation(self,i,j)
| 1
Error: Procedure ‘summation’ at (1) is already defined at (2)
That's also what I get with all earlier versions I tried, and I think the error
is correct.
The only bug I can see is the ICE that occurs with trunk (after the original
error message and a couple of follow-up errors):
f951: internal compiler error: Segmentation fault
0xc5ac8f crash_signal
/home/jweil/github/gcc/trunk/gcc/toplev.c:325
0x6a75b4 free_sym_tree
/home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
0x6a75bc free_sym_tree
/home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
0x6a75bc free_sym_tree
/home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
0x6a75bc free_sym_tree
/home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
0x6a75bc free_sym_tree
/home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
Looks like an infinite recursion in 'free_sym_tree'.
>From gcc-bugs-return-614100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 19:53:01 2018
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Subject: [Bug c++/84898] Fix-it hints for '.' vs '->'
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01909.html
which implements the fix-it hints for C++, but doesn't change the wording.
>From gcc-bugs-return-614101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:17:32 2018
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Subject: [Bug target/86856] Format warnings building all-gcc
Date: Wed, 29 Aug 2018 20:17:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to nightstrike from comment #9)
The %G warnings are due to r263239: the expected argument type has changed in
GCC 9 from gcall* to gimple*. There's no way to avoid those warnings when
using an older compiler. They should not appear if you use GCC 9 to build it.
>From gcc-bugs-return-614104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:31:45 2018
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Subject: [Bug c++/67491] [meta-bug] concepts issues
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Bug 67491 depends on bug 85265, which changed state.
Bug 85265 Summary: [concepts] ICE with missing identifier
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85265
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-614102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:31:03 2018
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Subject: [Bug c++/85265] [concepts] ICE with missing identifier
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed Aug 29 20:29:55 2018
New Revision: 263966
URL: https://gcc.gnu.org/viewcvs?rev=263966&root=gcc&view=rev
Log:
/cp
2018-08-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85265
* parser.c (cp_parser_introduction_list): If cp_parser_identifier
returns error_mark_node early exit the loop.
(cp_parser_template_introduction): Improve error-recovery, remove
error call about empty introduction-list.
/testsuite
2018-08-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85265
* g++.dg/concepts/pr85265.C: New.
Added:
trunk/gcc/testsuite/g++.dg/concepts/pr85265.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/85265] [concepts] ICE with missing identifier
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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Subject: [Bug target/86106] powerpc: Suboptimal logical operation
Date: Wed, 29 Aug 2018 20:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86106
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc |powerpc*-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-29
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. GCC has constant ints (not a variable) already before expand,
and already in GCC 4.8 (I didn't check older).
>From gcc-bugs-return-614105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:49:17 2018
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Subject: [Bug tree-optimization/87144] New: missing -Wformat for mismatched argument type
Date: Wed, 29 Aug 2018 20:49:00 -0000
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Bug ID: 87144
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GCC fails to diagnose the argument mismatch below. -Wformat runs too early to
detect it but the snprintf pass could do it.
$ cat f.c && gcc -O2 -S -Wall f.c
int f (_Bool str, int x, const char *s)
{
const char *f = str ? "%s" : "%i";
// Note the typo in the ternary operator below: it should be
// str ? s : x);
// instead.
return __builtin_snprintf (0, 0, f, s ? str : x);
}
>From gcc-bugs-return-614107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:50:06 2018
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Subject: [Bug fortran/85357] gfortran versions 7.2.0/8.0.1 reject F03 procedure overriding
Date: Wed, 29 Aug 2018 20:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85357
--- Comment #5 from cfd@mnet-mail.de ---
It would be rather surprising if the Fortran standard viewed this as being
invalid code (the procedure in question is bound to a dervied type,
hence should
be overridable).
Better to consult the standard to be sure (don't have a copy at hand,
unfortunately).
On 08/29/2018 09:47 PM, janus at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85357
>
> janus at gcc dot gnu.org changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |janus at gcc dot gnu.org
>
> --- Comment #4 from janus at gcc dot gnu.org ---
> I would argue that the code is actually invalid. A current trunk build shows:
>
> 23 | use base
> | 2
> ....
> 34 | subroutine summation(self,i,j)
> | 1
> Error: Procedure ‘summation’ at (1) is already defined at (2)
>
> That's also what I get with all earlier versions I tried, and I think the error
> is correct.
>
> The only bug I can see is the ICE that occurs with trunk (after the original
> error message and a couple of follow-up errors):
>
> f951: internal compiler error: Segmentation fault
> 0xc5ac8f crash_signal
> /home/jweil/github/gcc/trunk/gcc/toplev.c:325
> 0x6a75b4 free_sym_tree
> /home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
> 0x6a75bc free_sym_tree
> /home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
> 0x6a75bc free_sym_tree
> /home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
> 0x6a75bc free_sym_tree
> /home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
> 0x6a75bc free_sym_tree
> /home/jweil/github/gcc/trunk/gcc/fortran/symbol.c:3892
>
> Looks like an infinite recursion in 'free_sym_tree'.
>
>From gcc-bugs-return-614108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 20:51:00 2018
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Subject: [Bug fortran/29550] Optimize -fexternal-blas calls for conjg()
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44600|0 |1
is obsolete| |
--- Comment #13 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 44627
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44627&action=edit
Patch which shows the principle
This shows a way in which this could be done. Bounds checking
and reallocation on assignment are still missing, but should be
doable (like the inline matmul stuff already does).
>From gcc-bugs-return-614109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 21:04:09 2018
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Subject: [Bug c++/87145] New: Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Wed, 29 Aug 2018 21:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87145
Bug ID: 87145
Summary: Implicit conversion to scoped enum fails: "error:
taking address of temporary/rvalue"
Product: gcc
Version: unknown
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The following code can be compiled with GCC 6.3, but GCC 7.1 and later abort
the compilation with an error message.
=====
#include <cstddef>
#include <type_traits>
enum class Enum : std::size_t {};
struct Pod {
std::size_t val;
constexpr operator Enum() const {
return static_cast<Enum>(val);
}
};
template<std::size_t N>
constexpr void foo() {
using Foo = std::integral_constant<Enum, Pod{N}>;
}
int main() {
foo<2>();
}
=====
Error message from current trunk:
=====
<source>: In instantiation of 'constexpr void foo() [with long unsigned int N =
2]':
<source>:21:10: required from here
<source>:17:50: error: taking address of rvalue [-fpermissive]
17 | using Foo = std::integral_constant<Enum, Pod{N}>;
| ^
<source>:17:50: error: no matching function for call to 'Pod::operator
Enum(Pod*)'
<source>:10:13: note: candidate: 'constexpr Pod::operator Enum() const'
10 | constexpr operator Enum() const {
| ^~~~~~~~
<source>:10:13: note: candidate expects 0 arguments, 1 provided
Compiler returned: 1
=====
Live demo: https://godbolt.org/z/vfvGiS
PS: Which version should I choose if multiple versions are affected: stable,
trunk or [the first version with that regression]?
>From gcc-bugs-return-614110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 21:06:07 2018
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Subject: [Bug bootstrap/87146] New: ubsan bootstrap with non-gcc compiler fails
Date: Wed, 29 Aug 2018 21:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87146
Bug ID: 87146
Summary: ubsan bootstrap with non-gcc compiler fails
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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This bootstrap configure line works fine:
../trunk/configure --prefix=/home/dcb/gcc/results.263945.ubsan \
--with-build-config=bootstrap-ubsan \
--disable-multilib \
--disable-werror \
--enable-checking=release \
--enable-languages=c,c++,fortran
This doesn't
CC="/home/dcb/llvm/clang601/bin/clang -Wall" \
CXX="/home/dcb/llvm/clang601/bin/clang++ -Wall" \
../trunk/configure --prefix=/home/dcb/gcc/results.263945.ubsan \
--with-build-config=bootstrap-ubsan \
--disable-multilib \
--disable-werror \
--enable-checking=release \
--enable-languages=c,c++,fortran
failing at the bootstrap compare
Comparing stages 2 and 3
Bootstrap comparison failure!
fixincludes/fixfixes.o differs
gcc/ira-conflicts.o differs
gcc/gcc.o differs
gcc revision is 263945.
Should I wait for upcoming clang 7.0 or is there something
special about a non-gcc compiler bootstrap ?
>From gcc-bugs-return-614111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 21:12:16 2018
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Subject: [Bug tree-optimization/87117] [9 Regression] ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875
Date: Wed, 29 Aug 2018 21:12:00 -0000
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--- Comment #16 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to rguenther@suse.de from comment #15)
> On Wed, 29 Aug 2018, dcb314 at hotmail dot com wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87117
> >
> > --- Comment #14 from David Binderman <dcb314 at hotmail dot com> ---
> > Using a non-gcc compiler, for example clang, at the start
> > seems to break the ubsan bootstrap.
> >
> > Would it be worth me sending in another bug report or just posting
> > it here ?
>
> Please in another bug, not here.
Done. #87146.
>From gcc-bugs-return-614112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 21:22:56 2018
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Subject: [Bug tree-optimization/87147] New: GCC miscompiles at -O3 on valid code
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Summary: GCC miscompiles at -O3 on valid code
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
It miscompiles after r263959. Bisect points to r263875.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180829 (experimental) [trunk revision 263965] (GCC)
$ gcc-trunk abc.c ; ./a.out
$ gcc-trunk -O3 abc.c ; timeout -s 9 10 ./a.out
Killed
$ cat abc.c
short a;
long b;
int c, d, g;
char e, h;
long f[] = {0};
int main() {
int i = 1;
for (; a <= 3; a++) {
c = 0;
for (; c <= 2; c++) {
b = 0;
for (; b <= 3; b++) {
h = i && f[d];
e = g && i;
i = 0;
}
}
}
}
>From gcc-bugs-return-614113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 21:44:05 2018
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Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Wed, 29 Aug 2018 21:44:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Aug 29 21:43:18 2018
New Revision: 263967
URL: https://gcc.gnu.org/viewcvs?rev=263967&root=gcc&view=rev
Log:
PR c++/87095
* decl.c (begin_destructor_body): If current_class_type has
virtual bases and the primary base is nearly empty virtual base,
voidify clearing of vptr and make it conditional on in-charge
argument.
* g++.dg/ubsan/vptr-13.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ubsan/vptr-13.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:08:36 2018
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Subject: [Bug middle-end/86711] [9 Regression] wrong folding of memchr
Date: Wed, 29 Aug 2018 22:08:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |law at redhat dot com
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--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Should be fixed on trunk now.
>From gcc-bugs-return-614115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:09:03 2018
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Subject: [Bug middle-end/86714] tree-ssa-forwprop.c confused by too long initializer
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
Should be fixed on trunk now.
>From gcc-bugs-return-614116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:16:30 2018
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Subject: [Bug tree-optimization/84561] -Wstringop-truncation with -O2 depends on strncpy's size type
Date: Wed, 29 Aug 2018 22:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Known to fail| |8.2.0, 9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-614117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:17:02 2018
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Subject: [Bug middle-end/87053] wrong code with c_strlen
Date: Wed, 29 Aug 2018 22:17:00 -0000
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--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Aug 29 22:16:09 2018
New Revision: 263968
URL: https://gcc.gnu.org/viewcvs?rev=263968&root=gcc&view=rev
Log:
gcc:
2018-08-22 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR middle-end/87053
* builtins.c (c_strlen): Improve range checks.
testsuite:
2018-08-22 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR middle-end/87053
* gcc.c-torture/execute/pr87053.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr87053.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:31:35 2018
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Subject: [Bug middle-end/87053] wrong code with c_strlen
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Bernd's patch on the trunk.
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Subject: [Bug target/87139] 6.4 x86_64 incorrect code generation with -O3 around _addcarry_u64
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed on GCC 6 branch and above.
*** This bug has been marked as a duplicate of bug 81300 ***
>From gcc-bugs-return-614120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 29 22:53:12 2018
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Subject: [Bug target/81300] -fpeephole2 breaks __builtin_ia32_sbb_u64, _subborrow_u64 on AMD64
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |cbcode at gmail dot com
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 87139 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 00:01:34 2018
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--- Comment #12 from jon_y <10walls at gmail dot com> ---
I've just tested the trunk version as a Linux native build, I don't see the
warnings.
I will proceed to do a mingw cross compiler soon with the trunk version.
>From gcc-bugs-return-614122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 00:13:35 2018
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Subject: [Bug tree-optimization/84561] -Wstringop-truncation with -O2 depends on strncpy's size type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01934.html
>From gcc-bugs-return-614123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 02:03:36 2018
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Subject: [Bug middle-end/86540] [9 Regression] pr77445-2.c and ssa-dom-thread-7.c regressions since May 20, 2018
Date: Thu, 30 Aug 2018 02:03:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
It's on my TODO list :-)
>From gcc-bugs-return-614124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 02:22:48 2018
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Subject: [Bug c++/49224] [C++0x] Scoped enumeration instantiated even if not required
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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| |nathan at acm dot org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing c++ FE maintainers
>From gcc-bugs-return-614125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 03:49:46 2018
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Subject: [Bug c++/87148] New: backward compatibility issue to take char [] as incomplete type
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struct Tst{
char t[];
};
new Tst();
It will fail when compiled by gcc (7.3 or 8.2)
error: value-initialization of incomplete type [1mchar []
I have to correct to "char t[0]";
but with gcc 4.8.2 , it works fine.
Is it by design ??
Is there alternative way to make last version to compile successfully without
modify code ??
>From gcc-bugs-return-614126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 05:27:50 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/85357] gfortran versions 7.2.0/8.0.1 reject F03 procedure overriding
Date: Thu, 30 Aug 2018 05:27:00 -0000
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--- Comment #6 from janus at gcc dot gnu.org ---
(In reply to cfd from comment #5)
> It would be rather surprising if the Fortran standard viewed this as being
> invalid code (the procedure in question is bound to a dervied type,
> hence should
> be overridable).
Note that the error has nothing to do with type binding or overriding at all.
It concerns the name clash of the two subroutines. This reduced version
(without any derived types) shows the same error (and ICE):
module base
implicit none
contains
subroutine summation(i,j)
integer(4), intent(in) :: i
integer(4), intent(out) :: j
j = i + 1
end subroutine
end module base
module extended
use base
implicit none
contains
subroutine summation(i,j)
integer(4), intent(in) :: i
integer(4), intent(out) :: j
j = i + 2
end subroutine
end module extended
You have plenty of options to get around the error:
a) Don't use-import the first 'summation' routine in the second module (as
shown comment 1).
b) Make the 'summation' routines private and only make them available via the
type binding.
c) Use two different names, e.g.
type, abstract :: base_type
contains
procedure :: summation => summation_base
end type base_type
type, extends(base_type) :: extended_type
contains
procedure :: summation => summation__ext
end type extended_type
>From gcc-bugs-return-614127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 06:54:49 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 30 Aug 2018 06:54:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You also might want to test the patch from PR87132.
--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
> If you disable bootstrap does it work? The backtrace makes it look like memory
> corruption. Maybe you can also throw valgrind on it?
A --disable-bootstrap build (c, c++ only) does work on
i386-pc-solaris2.11, but I didn't run make check.
While there is a Solaris/x86 valgrind port, I haven't used it yet (and
it seems I'll have to use the git version on Solaris 11.4).
For a start, I ran the failing compilation with libumem (a debugging
malloc) preloaded and UMEM_DEBUG=default: this way, the compilation
succeeded without errors.
Afterwards, I managed to bootstrap with just LD_PRELOAD=libumem.so on
both i386-pc-solaris2.11 and sparc-sun-solaris2.11. That completed
successfully, but 200+ 32-bit Go tests now FAIL, together with two
64-bit libstdc++ max_align_t tests. Since there are already similar Go
failures with the libc malloc, I'm pretty sure this is just uncovering a
preexisting libgo bug.
I'll try what I can find with valgrind next.
>From gcc-bugs-return-614128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:05:50 2018
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From: "darko.veberic at ijs dot si" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Thu, 30 Aug 2018 07:05:00 -0000
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--- Comment #3 from Darko Veberic <darko.veberic at ijs dot si> ---
i will, soon. the delta is still running. unfortunately, the .ii file had 100k
lines...
>From gcc-bugs-return-614129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:16:15 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 30 Aug 2018 07:16:00 -0000
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--- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
> You also might want to test the patch from PR87132.
I had it in my tree already last night. I've now retried the exact same
tree without libumem, and now get an ICE in stage2 compiling gimplify.c:
during IPA pass: fnsummary
/vol/gcc/src/hg/trunk/local/gcc/gimplify.c: In function ‘void
gimplify_scan_omp_clauses(tree_node**, gimple**, omp_region_type, tree_code)’:
/vol/gcc/src/hg/trunk/local/gcc/gimplify.c:13162:1: internal compiler error: in
compute_fn_summary, at ipa-fnsummary.c:2492
13162 | }
| ^
0x9400a42 compute_fn_summary(cgraph_node*, bool)
/vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:2492
0x94029f2 inline_analyze_function(cgraph_node*)
/vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:3146
0x9402b8c ipa_fn_summary_generate
/vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:3189
0x956db21 execute_ipa_summary_passes(ipa_opt_pass_d*)
/vol/gcc/src/hg/trunk/local/gcc/passes.c:2149
0x9161451 ipa_passes
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2432
0x91617c4 symbol_table::compile()
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2543
0x9161e4b symbol_table::finalize_compilation_unit()
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2788
>From gcc-bugs-return-614130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:17:12 2018
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Subject: [Bug c++/87148] [6/7/8/9 Regression] backward compatibility issue to take char [] as incomplete type
Date: Thu, 30 Aug 2018 07:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87148
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |5.5.0
Version|unknown |6.4.1
Keywords| |needs-bisection,
| |rejects-valid
Last reconfirmed| |2018-08-30
Ever confirmed|0 |1
Summary|backward compatibility |[6/7/8/9 Regression]
|issue to take char [] as |backward compatibility
|incomplete type |issue to take char [] as
| |incomplete type
Target Milestone|--- |6.5
Known to fail| |6.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is rejected since GCC 6. gcc-6/changes.html doesn't document this change
in behavior.
Marking as regression. I guess it should be possible to allow this with
-fpermissive, effectively treating it as [0] (which is a GCC extension,
as is flexible array members).
>From gcc-bugs-return-614132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:21:31 2018
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Subject: [Bug tree-optimization/87147] GCC miscompiles at -O3 on valid code
Date: Thu, 30 Aug 2018 07:21:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Version|unknown |9.0
Keywords| |wrong-code
Last reconfirmed| |2018-08-30
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Target Milestone|--- |9.0
>From gcc-bugs-return-614131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:21:14 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87141] configure:14586: error: Could not determine word size.
Date: Thu, 30 Aug 2018 07:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-08-30
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
configure:14583: ./conftest
/media/gcc-8.2.0/libatomic/configure: line 1: ./conftest: cannot execute binary
file
configure:14583: $? = 126
configure: program exited with status 126
here (x86_64-linux) 126 is ENOKEY. Looks like somehow your platform requires
signed executables?
Can you even execute a simple hello world you compile yourself?
>From gcc-bugs-return-614133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:26:06 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 30 Aug 2018 07:26:00 -0000
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Aug 2018, ro at CeBiTec dot Uni-Bielefeld.DE wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87134
>
> --- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> > --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
> > You also might want to test the patch from PR87132.
>
> I had it in my tree already last night. I've now retried the exact same
> tree without libumem, and now get an ICE in stage2 compiling gimplify.c:
OK, so at least that one cannot be caused by stage1 miscompiling stage2
cc1[plus].
I wonder if you can run the testsuite in the not bootstrapped tree
and look for sth suspicious.
There is uninitialized memory (but it should never be used...) in
the new VN, so a shot in the dark would be
Index: gcc/tree-ssa-sccvn.c
===================================================================
--- gcc/tree-ssa-sccvn.c (revision 263972)
+++ gcc/tree-ssa-sccvn.c (working copy)
@@ -6240,7 +6240,7 @@ do_rpo_vn (function *fn, edge entry, bit
for (int i = 0; i < n; ++i)
bb_to_rpo[rpo[i]] = i;
- unwind_state *rpo_state = XNEWVEC (unwind_state, n);
+ unwind_state *rpo_state = XCNEWVEC (unwind_state, n);
rpo_elim avail (entry->dest);
rpo_avail = &avail;
> during IPA pass: fnsummary
> /vol/gcc/src/hg/trunk/local/gcc/gimplify.c: In function ‘void
> gimplify_scan_omp_clauses(tree_node**, gimple**, omp_region_type, tree_code)’:
> /vol/gcc/src/hg/trunk/local/gcc/gimplify.c:13162:1: internal compiler error: in
> compute_fn_summary, at ipa-fnsummary.c:2492
> 13162 | }
> | ^
> 0x9400a42 compute_fn_summary(cgraph_node*, bool)
> /vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:2492
> 0x94029f2 inline_analyze_function(cgraph_node*)
> /vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:3146
> 0x9402b8c ipa_fn_summary_generate
> /vol/gcc/src/hg/trunk/local/gcc/ipa-fnsummary.c:3189
> 0x956db21 execute_ipa_summary_passes(ipa_opt_pass_d*)
> /vol/gcc/src/hg/trunk/local/gcc/passes.c:2149
> 0x9161451 ipa_passes
> /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2432
> 0x91617c4 symbol_table::compile()
> /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2543
> 0x9161e4b symbol_table::finalize_compilation_unit()
> /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2788
Given this is the stage1 compiler complaining it looks unrelated.
What's your host compiler? Do you use custom STAGE1_CFLAGS?
>From gcc-bugs-return-614134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:29:01 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87149] New: ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 07:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87149
Bug ID: 87149
Summary: ICE in extract_insn, at recog.c:2305 on ppc64le
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: powerpc64le-linux
Following causes ICE:
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90:52:0:
52 | end
|
Error: unrecognizable insn:
(insn 11 10 12 2 (set (reg:DI 151)
(unspec:DI [
(reg:DF 153)
] UNSPEC_FCTID))
"/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90":15 -1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90:52:0:
internal compiler error: in extract_insn, at recog.c:2305
0x1f27bfa _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:108
0x1f27c79 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:116
0x1df1088 extract_insn(rtx_insn*)
/home/marxin/Programming/gcc/gcc/recog.c:2305
0x1510334 instantiate_virtual_regs_in_insn
/home/marxin/Programming/gcc/gcc/function.c:1605
0x1513e03 instantiate_virtual_regs
/home/marxin/Programming/gcc/gcc/function.c:1975
0x151406e execute
/home/marxin/Programming/gcc/gcc/function.c:2024
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-614135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:33:36 2018
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Subject: [Bug c++/87145] [7/8/9 Regression] Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Thu, 30 Aug 2018 07:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.3.0
Version|unknown |7.3.1
Target Milestone|--- |7.4
Summary|Implicit conversion to |[7/8/9 Regression] Implicit
|scoped enum fails: "error: |conversion to scoped enum
|taking address of |fails: "error: taking
|temporary/rvalue" |address of
| |temporary/rvalue"
>From gcc-bugs-return-614136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:35:42 2018
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Subject: [Bug bootstrap/87146] ubsan bootstrap with non-gcc compiler fails
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87146
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
There is nothing special about a non-GCC host compiler bootstrap. Does clang
default to optimizing? If so try bootstrapping with STAGE1_CFLAGS="-O0"
>From gcc-bugs-return-614137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:39:12 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87147] [9 Regression] GCC miscompiles at -O3 on valid code
Date: Thu, 30 Aug 2018 07:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87147
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Summary|GCC miscompiles at -O3 on |[9 Regression] GCC
|valid code |miscompiles at -O3 on valid
| |code
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Disabling cunroll fixes it. Investigating.
>From gcc-bugs-return-614138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:40:37 2018
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From: "sbergman at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87150] New: move ctor wrongly chosen in return stmt (derived vs. base)
Date: Thu, 30 Aug 2018 07:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87150
Bug ID: 87150
Summary: move ctor wrongly chosen in return stmt (derived vs.
base)
Product: gcc
Version: 8.0
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struct S1 { S1(S1 &&); };
struct S2: S1 {};
S1 f(S2 s) { return s; }
is accepted by GCC 8.1 but violates [class.copy.elision]/3, which dismisses the
move ctor if "the type of the first parameter of the selected constructor is
not an rvalue reference to the object’s type (possibly cv-qualified)" (and
which is the case here, where the object's type is S2 but the ctor parameter's
type is S1&&. (Referring to C++17, but wording is similar back to C++11, and
GCC's behavior is the same for -std=c++{11,14,17}.)
Checking on godbolt.org, the error of accepting the code appears to have been
introduced between GCC 7.3 and 8.1.
(Also see mail thread starting at
<http://lists.llvm.org/pipermail/cfe-dev/2018-August/059186.html> "return
lvalue move instead of copy?".)
>From gcc-bugs-return-614139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:47:35 2018
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From: "valeryweber at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87151] New: allocating array of character
Date: Thu, 30 Aug 2018 07:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87151
Bug ID: 87151
Summary: allocating array of character
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dear all
gcc 8.2 seems to have a problem allocating the string below. the len() should
be 2, is that a bug?
many thanks
valery
cat alloc_char.f90
module bvec
type, public :: bvec_t
private
character(:), dimension(:), allocatable :: vc
contains
PROCEDURE, PASS :: create
end type bvec_t
contains
subroutine create(this)
class(bvec_t), intent(inout) :: this
allocate(character(2)::this%vc(3))
write(*,*) len(this%vc),size(this%vc)
end subroutine create
end module bvec
program test
use bvec
type(bvec_t) :: a
call a%create()
end program test
gfortran-8.2.0 alloc_char.f90
./a.out
0 3
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Subject: [Bug tree-optimization/87147] [9 Regression] GCC miscompiles at -O3 on valid code
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so the issue is that while non-iterating RPO VN assumes executable
backedges it fails to mark destination blocks as executable.
Testing fix.
>From gcc-bugs-return-614141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:56:11 2018
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Thu, 30 Aug 2018 07:56:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Same happens for:
./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/do_check_3.f90
#0 lookup_handler (scode=1122058) at insn-opinit.c:1156
#1 0x00000000032f34de in raw_optab_handler (scode=1122058) at
insn-opinit.c:1173
#2 0x00000000013a87d2 in convert_optab_handler (op=ufixtrunc_optab,
to_mode=E_DImode, from_mode=E_SFmode) at
/home/marxin/Programming/gcc/gcc/optabs-query.h:55
#3 0x0000000001c4c93a in can_fix_p (fixmode=E_DImode, fltmode=E_SFmode,
unsignedp=1, truncp_ptr=0x7fffffffc9bb) at
/home/marxin/Programming/gcc/gcc/optabs-query.c:313
#4 0x0000000001c2759a in expand_fix (to=0x7ffff5afca38, from=0x7ffff5afc9f0,
unsignedp=1) at /home/marxin/Programming/gcc/gcc/optabs.c:4922
#5 0x0000000001405268 in expand_expr_real_2 (ops=0x7fffffffd230,
target=0x7ffff5afca38, tmode=E_DImode, modifier=EXPAND_NORMAL) at
/home/marxin/Programming/gcc/gcc/expr.c:8961
#6 0x0000000000f8e553 in expand_gimple_stmt_1 (stmt=<gimple_assign
0x7ffff5af4190>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3673
#7 0x0000000000f8ea9a in expand_gimple_stmt (stmt=<gimple_assign
0x7ffff5af4190>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3734
#8 0x0000000000fa3f59 in expand_gimple_basic_block (bb=<basic_block
0x7ffff5a1c138 (2)>, disable_tail_calls=false) at
/home/marxin/Programming/gcc/gcc/cfgexpand.c:5770
on native target pats contains {scode = 1122058, icode =
CODE_FOR_fixuns_truncsfdi2}, on cross compiler not.
cross-compiler: (gdb) p sizeof(pats)
$2 = 4440
native:
(gdb) p sizeof(pats)
$15 = 5448
That said, isn't it similar to: PR86684?
>From gcc-bugs-return-614142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 07:58:18 2018
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 07:58:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Native compiler works fine however.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.3.1
Keywords| |accepts-invalid, wrong-code
Last reconfirmed| |2018-08-30
Ever confirmed|0 |1
Summary|move ctor wrongly chosen in |[8/9 Regression] move ctor
|return stmt (derived vs. |wrongly chosen in return
|base) |stmt (derived vs. base)
Target Milestone|--- |8.3
Known to fail| |8.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87149
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
But ICEs with:
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90
-c -mno-fprnd
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90:52:0:
52 | end
|
Error: unrecognizable insn:
(insn 12 11 13 2 (set (reg:DI 152)
(unspec:DI [
(reg:DF 154)
] UNSPEC_FCTID))
"/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90":15 -1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/nint_2.f90:52:0:
internal compiler error: in extract_insn, at recog.c:2305
0x10f1f903 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0x10f1f97b _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc/rtl-error.c:116
0x10ea251f extract_insn(rtx_insn*)
../../gcc/recog.c:2305
0x10a1409f instantiate_virtual_regs_in_insn
../../gcc/function.c:1605
0x10a15eaf instantiate_virtual_regs
../../gcc/function.c:1975
0x10a1601f execute
../../gcc/function.c:2024
Thus dup of PR86684?
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Subject: [Bug c++/87152] New: internal compiler error: in tsubst_copy, at cp/pt.c:15484
Date: Thu, 30 Aug 2018 08:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87152
Bug ID: 87152
Summary: internal compiler error: in tsubst_copy, at
cp/pt.c:15484
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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https://godbolt.org/z/RnO6a-
#include <array>
#include <cmath>
#include <iostream>
template<bool ... bits>
constexpr int int_from_bits()
{
constexpr auto a = std::array{bits...};
int sum = 0;
for (int index = 0; bool const b : a)
{
sum += b ? exp2(index) : 0;
}
return sum;
}
int j = int_from_bits<false,false,true>();
<source>: In instantiation of 'constexpr int int_from_bits() [with bool ...bits
= {false, false, true}]':
<source>:19:40: required from here
<source>:13:25: internal compiler error: in tsubst_copy, at cp/pt.c:15486
13 | sum += b ? exp2(index) : 0;
| ^~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
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Subject: [Bug fortran/87151] allocating array of character
Date: Thu, 30 Aug 2018 09:31:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-30
Blocks| |68241
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.9.3 up to trunk (9.0).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] [F03] Deferred-length character
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Subject: [Bug c++/87148] [6/7/8/9 Regression] backward compatibility issue to take char [] as incomplete type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There is no reason to accept this code, the struct type is not valid in GNU C
and not valid in ISO C++.
This is a proper testcase that actually compiled with older versions of G++:
struct Tst{
char t[];
};
Tst* p = new Tst();
This was silently accepted until r231665 which correctly says:
87148.cc:2:11: error: flexible array member ‘Tst::t’ in an otherwise empty
‘struct Tst’
char t[];
^
87148.cc:1:8: note: in the definition of ‘struct Tst’
struct Tst{
^~~
87148.cc:4:18: error: value-initialization of incomplete type ‘char []’
Tst* p = new Tst();
^
Rejecting a struct with no members except a flexible/empty array member is the
right thing to do. G++ was wrong to accept them previously (it was far too
lenient in the nonsense it accepted as flexible array members).
If we fix the testcase:
struct Tst{
int i;
char t[];
};
Tst t = Tst();
Now we get the claimed error:
87148.c:5:13: error: value-initialization of incomplete type 'char []'
Tst t = Tst();
^
It seems reasonable to accept this, ignoring the array during initialization.
This started with r231665. CCing Martin who fixed all the bugs with
flexible/empty array members.
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Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
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--- Comment #7 from vladlazar at gcc dot gnu.org ---
Author: vladlazar
Date: Thu Aug 30 09:30:49 2018
New Revision: 263973
URL: https://gcc.gnu.org/viewcvs?rev=263973&root=gcc&view=rev
Log:
Enable underflow check in canonicalize_comparison. (PR86995)
gcc/
2018-08-30 Vlad Lazar <vlad.lazar@arm.com>
PR middle-end/86995
* expmed.c (canonicalize_comparison): Use wi::sub instead of wi::add
if to_add is negative.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expmed.c
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Subject: [Bug c++/87148] [6/7/8/9 Regression] backward compatibility issue to take char [] as incomplete type
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See PR 68478 in particular for the change requiring a complete type.
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 09:39:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
That one works fine on both native and cross for me, too.
Please describe your config better? binutils version, libc version, exact
configure command, to start with?
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Subject: [Bug c++/87145] [7/8/9 Regression] Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Thu, 30 Aug 2018 09:44:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-30
CC| |jason at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to programmer from comment #0)
> PS: Which version should I choose if multiple versions are affected: stable,
> trunk or [the first version with that regression]?
It doesn't really matter. We use other fields to track which versions the
regression affects.
Reduced:
template<typename T, T t> struct integral_constant {
static constexpr T value = t;
};
enum class Enum : unsigned {};
struct Pod {
unsigned val;
constexpr operator Enum() const {
return static_cast<Enum>(val);
}
};
template<unsigned N>
constexpr void foo() {
using Foo = integral_constant<Enum, Pod{N}>;
}
int main() {
foo<2>();
}
This started to ICE with r241425:
PR c++/77656
* pt.c (convert_template_argument): Call convert_nontype_argument
on value-dependent but not type-dependent arguments.
(convert_nontype_argument): Handle value-dependent arguments.
(canonicalize_expr_argument): New.
(deducible_expression, unify): Skip CONVERT_EXPR.
* error.c (dump_template_argument): Likewise.
* mangle.c (write_expression): Likewise.
And then started giving the current error with r257311 which relaxed an
assertion to stop the ICE:
PR c++/84125
* typeck.c (build_address): Relax the assert when
processing_template_decl.
Because of the ICE I can't tell when the error started.
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Subject: [Bug fortran/69455] [6/7/8/9 Regression] [F08] Assembler error(s) when using intrinsic modules in two BLOCK
Date: Thu, 30 Aug 2018 09:49:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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CC| |pault at gcc dot gnu.org
--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> A two line patch (or one rather long line) is sufficient to work
> around the brokeness of the intrinsics modules.
Could someone guess what are this two lines?
>From gcc-bugs-return-614152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 09:49:02 2018
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Thu, 30 Aug 2018 09:49:00 -0000
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It's a different symptom, but sure, might be related. Somehow your toolchain
thinks it is a newer ISA but not compliant to older ISAs :-/
>From gcc-bugs-return-614154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 09:50:42 2018
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From: "vladlazar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/86995] [9 regression] c-c++-common/torture/builtin-arith-overflow-17.c etc. FAIL
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vladlazar at gcc dot gnu.org changed:
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--- Comment #8 from vladlazar at gcc dot gnu.org ---
Fixed by r263973. The issue was that in case of underflow, the overflow flag
was not set. The solution was to use wi::sub when decrementing.
>From gcc-bugs-return-614155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 09:53:19 2018
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Subject: [Bug c++/87145] [7/8/9 Regression] Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Thu, 30 Aug 2018 09:53:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah, the regression started with the same revision as the ICE, r241425 (applying
the fix from r257311 to that revision fixes the ICE but gives the "taking the
address of temporary" error).
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Subject: [Bug c/87153] New: Confusing / Incorrect clobber warning with ISRA / -Wclobber
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Bug ID: 87153
Summary: Confusing / Incorrect clobber warning with ISRA /
-Wclobber
Product: gcc
Version: 8.1.0
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Created attachment 44628
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44628&action=edit
Preprocessed file which produces clobbering warning
I am getting the following warning from code, compiling with -Os -Wclobbered
src/read.c: In function ‘EvalRef.isra.25’:
cc1: warning: argument ‘ISRA.312’ might be clobbered by ‘longjmp’ or ‘vfork’
[-Wclobbered]
EvalRef is defined as:
static UInt EvalRef(const LHSRef ref, Int needExpr)
Which fdump-tree-all, preprocess.c.225t.switchlower shows as:
EvalRef.isra.25 (const REFTYPE ISRA.310, const UInt ISRA.311, const UInt
ISRA.312, Int needExpr)
So, there are (I feel) two issues. Firstly, the warning isn't helpful as it
references a gcc-introduced function. Also I still don't see how ISRA.312 could
get clobbered, as it is const.
Unfortunately I have tried and failed to produce a small reproducable case of
this. I attach a preprocessed source file, made with gcc 8.0.1 on Ubuntu 18.04,
from the current master branch of https://www.github.com/gap-system/gap
>From gcc-bugs-return-614157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 10:19:09 2018
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Subject: [Bug c++/84980] [concepts] ICE with missing typename in concept
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-614158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 10:40:50 2018
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Subject: [Bug middle-end/87153] Confusing / Incorrect clobber warning with ISRA / -Wclobber
Date: Thu, 30 Aug 2018 10:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I think the warning tells you that the ISRA.312 when not spilled
to the stack by the compiler, might be not properly restored. That it is
'const' doesn't really matter.
Given the source passes an aggregate by value depending on the ABI
you might get the very same bad effect.
Eventually we can do better with this warning and only warn when we
actually failed to spill the register.
I think the warning for arguments is usually a false positive since
argument registers are call-clobbered.
Given we use setjmp_crosses for the warning I wonder why we do not use
that to guide register allocation ...
>From gcc-bugs-return-614159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 10:49:56 2018
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From: "mcastelluccio at mozilla dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/86536] Function "returned NAN %" for a simple program which forks
Date: Thu, 30 Aug 2018 10:49:00 -0000
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--- Comment #4 from Marco Castelluccio <mcastelluccio at mozilla dot com> ---
Sorry for the delay, it sounds fine to me, I can't think of anything better
than that!
>From gcc-bugs-return-614160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:07:01 2018
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From: "mcastelluccio at mozilla dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/83877] Make gcov accept a path to the gcda and a path to the gcno file
Date: Thu, 30 Aug 2018 11:07:00 -0000
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--- Comment #3 from Marco Castelluccio <mcastelluccio at mozilla dot com> ---
The problem we have is that there's a directory containing gcno files and
multiple directories containing gcda files (one for each test suite execution).
gcov expects the gcda and gcno files to be in the same directory, so we
currently create symlinks to the gcno files in the gcda directories.
Example situation:
gcno_dir/main.gcno
gcda_dir_1/main.gcda
gcda_dir_2/main.gcda
If I run `gcov gcda_dir_1/main.gcda -o gcno_dir/`, gcov says:
gcno/main.gcda:cannot open data file, assuming not executed
>From gcc-bugs-return-614161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:36:54 2018
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From: "artem.alimarin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/37158] Wrong insn for _mm_comieq_sd
Date: Thu, 30 Aug 2018 11:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37158
Artem Alimarin <artem.alimarin at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |artem.alimarin at gmail dot com
--- Comment #2 from Artem Alimarin <artem.alimarin at gmail dot com> ---
Just checked. This bug is still there in gcc 5.5.0.
Compiler intrinsics like _mm_comieq_sd() are a way to use the corresponding
processor instructions. ix86_fp_compare_mode has nothing to do with that.
The double FP number implementation one can use ucomisd explicitly. It is not
bound to using comisd.
Please reconsider fixing the bug.
>From gcc-bugs-return-614162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:39:37 2018
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From: "uberprugelknabe at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87154] New: Internal compiler error: in gimplify_expr, at gimplify.c:12215
Date: Thu, 30 Aug 2018 11:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87154
Bug ID: 87154
Summary: Internal compiler error: in gimplify_expr, at
gimplify.c:12215
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: uberprugelknabe at hotmail dot com
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Created attachment 44629
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44629&action=edit
This file triggers the crash
When compiling the attached source file (originally from a large project,
reduced to just the lines causing the crash) an ICE is triggered.
Confirmed in both gcc 7.3.1 and 7.3.0.
Example compiles correctly in Intel fortran and PGI fortran.
A slightly modified source file also attached using an explicit pointer instead
of an ASSICATE compiles without errors.
Stack trace:
gfortran -c crash.f90
crash.f90:31:0:
args = str_split(param,',')
internal compiler error: in gimplify_expr, at gimplify.c:12215
0x87241e gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:12215
0x8789e9 gimplify_modify_expr
../../gcc/gimplify.c:5488
0x871489 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11248
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x871d2b gimplify_statement_list
../../gcc/gimplify.c:1715
0x871d2b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11676
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x874448 gimplify_bind_expr
../../gcc/gimplify.c:1288
0x8720aa gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11448
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x871d2b gimplify_statement_list
../../gcc/gimplify.c:1715
0x871d2b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11676
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x874448 gimplify_bind_expr
../../gcc/gimplify.c:1288
0x8720aa gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11448
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x871d2b gimplify_statement_list
../../gcc/gimplify.c:1715
0x871d2b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11676
0x873b08 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6505
0x874448 gimplify_bind_expr
../../gcc/gimplify.c:1288
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-614163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:40:39 2018
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Subject: [Bug fortran/87154] Internal compiler error: in gimplify_expr, at gimplify.c:12215
Date: Thu, 30 Aug 2018 11:40:00 -0000
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--- Comment #1 from Ögmundur Petersson <uberprugelknabe at hotmail dot com> ---
Created attachment 44630
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44630&action=edit
This file works fine
>From gcc-bugs-return-614165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:44:16 2018
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 11:44:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-30
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-614164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:44:00 2018
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 11:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87149
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I have reproduced it.
>From gcc-bugs-return-614166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:52:00 2018
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From: "artiom.yurol at ya dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87155] New: unnamed namespace redeclaration error when inline namespace is present
Date: Thu, 30 Aug 2018 11:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87155
Bug ID: 87155
Summary: unnamed namespace redeclaration error when inline
namespace is present
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: artiom.yurol at ya dot ru
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Created attachment 44631
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44631&action=edit
preprocessed file
namespace n1 {
namespace {}
inline namespace n2 {
namespace {}
}
namespace {}
}
This should compile just fine, but it doesn't. G++ rejects it reporting that
the extension of unnamed namespace at line 8 conflicts with the declaration at
line 2.
$ gcc ../playground.cpp
../playground.cpp:8:5: error: ‘namespace n1:: { }’ conflicts with a previous
declaration
namespace {}
^~~~~~~~~
../playground.cpp:2:5: note: previous declaration ‘namespace n1:: { }’
namespace {}
^~~~~~~~~
Clang-6.0 doesn't reject the code. Removing nested namespace n2 also fixes the
problem
>From gcc-bugs-return-614167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 11:53:35 2018
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/37158] Wrong insn for _mm_comieq_sd
Date: Thu, 30 Aug 2018 11:53:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
This is fixed in gcc-8.
Related to PR82692.
>From gcc-bugs-return-614168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:20:25 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87155] unnamed namespace redeclaration error when inline namespace is present
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-614169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:22:36 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
Date: Thu, 30 Aug 2018 12:22:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
Known to work| |7.3.0
Summary|unnamed namespace |[8/9 Regression] unnamed
|redeclaration error when |namespace redeclaration
|inline namespace is present |error when inline namespace
| |is present
Known to fail| |8.2.0, 9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a regression since GCC 7, starting with r248521
gcc/
Implement DR2061
* name-lookup.c (push_inline_namespaces): New.
(push_namespace): Look inside inline namespaces.
testsuite/
* g++.dg/cpp0x/dr2061.C: New.
* g++.dg/parse/namespace-alias-1.C: Add more test.
>From gcc-bugs-return-614170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:25:39 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 12:25:00 -0000
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So both -Q --help=target as well as -fverbose-asm say -mfprnd is on; but the
ICE is because TARGET_FPRND is _off_. What.
>From gcc-bugs-return-614171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:32:15 2018
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Thu, 30 Aug 2018 12:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org,
| |redi at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed with r251035 aka PR80452 aka C++ Core issue 1579.
So, is this really invalid?
>From gcc-bugs-return-614172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:36:35 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
Date: Thu, 30 Aug 2018 12:36:00 -0000
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Hm, while I understand the intent here, I wonder if clang is succeeding by
accident? The std is not completely clear whether all anonymous namespaces may
share the same unique identifier or not. We do, and hence fail here for the
same reasons as-if the two anonymous namespaces were named 'bob'. Will ask.
>From gcc-bugs-return-614173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:37:47 2018
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Subject: [Bug tree-optimization/87147] [9 Regression] GCC miscompiles at -O3 on valid code
Date: Thu, 30 Aug 2018 12:37:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Aug 30 12:37:10 2018
New Revision: 263980
URL: https://gcc.gnu.org/viewcvs?rev=263980&root=gcc&view=rev
Log:
2018-08-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/87147
* tree-ssa-sccvn.c (SSA_VISITED): New function.
(visit_phi): When the degenerate result is from the backedge and
we didn't visit its definition yet drop to VARYING.
(do_rpo_vn): Properly mark blocks with incoming backedges as
executable.
* gcc.dg/torture/pr87147.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87147.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-614174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:40:07 2018
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Subject: [Bug tree-optimization/87147] [9 Regression] GCC miscompiles at -O3 on valid code
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:51:47 2018
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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--- Comment #3 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Jakub Jelinek from comment #2)
> This changed with r251035 aka PR80452 aka C++ Core issue 1579.
> So, is this really invalid?
but CWG1579 didn't change the "if the type of the first parameter of the
selected constructor is not an rvalue reference to the object’s type (possibly
cv-qualified), overload resolution is performed again, considering the object
as an
lvalue." part
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-30
CC| |fdumont at gcc dot gnu.org
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.3
>From gcc-bugs-return-614179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:55:40 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
Date: Thu, 30 Aug 2018 12:55:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This changed with https://wg21.link/lwg2156
>From gcc-bugs-return-614178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:55:02 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Thu, 30 Aug 2018 12:55:00 -0000
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So, so far I have only reproduced it if I configure the compiler for
ppc64le-linux
(not powerpc64le-linux), _and_ I have no working assembler for that. Is that
your situation, too?
>From gcc-bugs-return-614180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:57:54 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Thu, 30 Aug 2018 12:57:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right. CWG 1579 says we should move here:
struct A { };
struct B { B(A&&) { } };
B f() { A a; return a; }
That's a different case though.
>From gcc-bugs-return-614181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 12:59:33 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Thu, 30 Aug 2018 12:59:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r251035 clearly has code that handles that rule:
+
+ if (flags & LOOKUP_PREFER_RVALUE)
+ {
+ /* The implicit move specified in 15.8.3/3 fails "...if the type of
+ the first parameter of the selected constructor is not an rvalue
+ reference to the object’s type (possibly cv-qualified)...." */
+ gcc_assert (!(complain & tf_error));
+ tree ptype = convs[0]->type;
+ if (TREE_CODE (ptype) != REFERENCE_TYPE
+ || !TYPE_REF_IS_RVALUE (ptype)
+ || CONVERSION_RANK (convs[0]) > cr_exact)
+ return error_mark_node;
+ }
The thing is that LOOKUP_PREFER_RVALUE isn't set in this case, as we trigger
first:
else if (MAYBE_CLASS_TYPE_P (to) && MAYBE_CLASS_TYPE_P (from)
&& is_properly_derived_from (from, to))
{
if (conv->kind == ck_rvalue)
conv = next_conversion (conv);
conv = build_conv (ck_base, to, conv);
/* The derived-to-base conversion indicates the initialization
of a parameter with base type from an object of a derived
type. A temporary object is created to hold the result of
the conversion unless we're binding directly to a reference. */
conv->need_temporary_p = !(flags & LOOKUP_NO_TEMP_BIND);
}
else
return NULL;
in standard_conversion, where
*conv
$17 = {kind = ck_rvalue, rank = cr_identity, user_conv_p = 0, ellipsis_p = 0,
this_p = 0, bad_p = 0, need_temporary_p = 0, base_p = 0,
rvaluedness_matches_p = 1, check_narrowing = 0, check_narrowing_const_only =
0, type = <record_type 0x7fffefdd32a0 S2>, u = {next = 0x2f92e80,
expr = <error_mark 0x2f92e80>, list = 0x2f92e80}, cand = 0x0}
and
*next_conversion (conv)
$18 = {kind = ck_identity, rank = cr_identity, user_conv_p = 0, ellipsis_p = 0,
this_p = 0, bad_p = 0, need_temporary_p = 0, base_p = 0,
rvaluedness_matches_p = 0, check_narrowing = 0, check_narrowing_const_only =
0, type = <record_type 0x7fffefdd32a0 S2>, u = {
next = 0x7fffefdbd6c0, expr = <indirect_ref 0x7fffefdbd6c0>, list =
0x7fffefdbd6c0}, cand = 0x0}
so we are no longer using ck_rvalue conversion with rvaluedness_matches_p, but
ck_base conversion instead.
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From: "artiom.yurol at ya dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
Date: Thu, 30 Aug 2018 13:06:00 -0000
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--- Comment #3 from Artem Yurchenko <artiom.yurol at ya dot ru> ---
(In reply to Nathan Sidwell from comment #2)
> Hm, while I understand the intent here, I wonder if clang is succeeding by
> accident? The std is not completely clear whether all anonymous namespaces
> may share the same unique identifier or not. We do, and hence fail here for
> the same reasons as-if the two anonymous namespaces were named 'bob'. Will
> ask.
If two namespaces named 'bob' are in the same enclosing namespace, the second
should extend the first one, not redeclare it. Also, I checked it on
https://godbolt.org/z/4PhIG0, and the code compiles with virtually every
compiler that I choose (besides gcc 8.1+)
>From gcc-bugs-return-614183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 13:21:48 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
Date: Thu, 30 Aug 2018 13:21:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes but it would conflict with n1::n2::bob because n2 is an inline namespace.
It seems like the diagnostic is misleading, it suggests n1::bob conflicts with
itself, but actually it conflicts with n1::n2::bob:
namespace n1 {
namespace bob {}
inline namespace n2 {
namespace bob {}
}
namespace bob {}
}
anon.cc:8:15: error: 'namespace n1::bob { }' conflicts with a previous
declaration
8 | namespace bob {}
| ^~~
anon.cc:2:15: note: previous declaration 'namespace n1::bob { }'
2 | namespace bob {}
| ^~~
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Thu, 30 Aug 2018 13:57:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps that
if (conv->kind == ck_rvalue)
conv = next_conversion (conv);
shouldn't be done if (flags & LOOKUP_PREFER_RVALUE) or if
conv->rvaluedness_matches_p? Just a wild guess though, that code dates back
to:
Fri Feb 13 14:55:37 1998 Jason Merrill <jason@yorick.cygnus.com>
* call.c (standard_conversion): Fix multi-level ptr conversions.
>From gcc-bugs-return-614185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:02:38 2018
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From: "pipcet at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
Date: Thu, 30 Aug 2018 14:02:00 -0000
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--- Comment #12 from pipcet at gmail dot com ---
(In reply to pipcet from comment #11)
> (insn 7 6 8 2 (set (reg:CCZ 17 flags)
> (compare:CCZ (and:DI (not:DI (reg/v:DI 86 [ i ]))
> (const_int 12 [0xc]))
> (const_int 0 [0]))) "h17.c":4 15 {*cmpdi_1}
> (expr_list:REG_DEAD (reg:DI 88)
>
> Surely we should be dealing with a canonical form instead? Who's
> generating this non-canonical expression, and why?
simplify-rtx.c, it turns out, because it "canonicalizes" (x & y) = y to (~x &
y) = 0. I think that's strange, but we can work around it.
I'm testing these three approaches:
1. canonicalize to (x-y) & z = 0
2. don't canonicalize, but add a define_insn_and_split
3. original gcc
head-to-head. I'm compiling trunk Emacs with Paul's patch reverted, then
running "perf stat ./src/temacs --batch" in a loop and producing a histogram
of the cycles needed. It seems (1) and (2) beat (3) quite significantly (1.1%)
while (1) very narrowly beats (2) (< 0.1%). Both values are the median values,
but it looks like the curves are simply shifted a little, so I'm prepared to
say it's a consistent effect.
The code looks good, and the slight difference between (1) and (2) makes sense,
because (2) generates:
leal -5(%rdi), %esi
movq %rdi, %rax
andl $7, %esi
je .L129
ret
.p2align 4,,10
.p2align 3
.L129:
movslq suspicious_object_index(%rip), %rsi
movl $0, %ecx
while (1) realizes %rsi is zero at this point and skips the movl. (Looking at
this code, I do not understand why movl is used rather than the standard xorl,
though, so maybe this is another optimization opportunity).
So I think the performance difference is really significant for Emacs; my plan
is to test all three versions on other programs, make sure the code works for C
bitfields, and then submit it for inclusion. Is that okay?
>From gcc-bugs-return-614186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:28:50 2018
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Subject: [Bug bootstrap/87146] ubsan bootstrap with non-gcc compiler fails
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With bootstrap-ubsan only stage2/stage3 are built with -fsanitize=undefined, so
most likely clang just miscompiled something.
>From gcc-bugs-return-614187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:28:56 2018
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Subject: [Bug fortran/87154] Internal compiler error: in gimplify_expr, at gimplify.c:12215
Date: Thu, 30 Aug 2018 14:28:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on 7.3.0. This seems to be fixed on 8.2.0 and trunk (9.0).
Revision r252781 (2017-09-15) gives the error
ASSOCIATE(arg=>args(1))
1
Error: Entity 'arg' at (1) has a deferred type parameter and requires either
the POINTER or ALLOCATABLE attribute
r253527 (2017-10-08) compiles the test.
I get the ICE with revisions r253041, r253132, and r253237.
>From gcc-bugs-return-614188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:43:30 2018
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Subject: [Bug bootstrap/87141] configure:14586: error: Could not determine word size.
Date: Thu, 30 Aug 2018 14:43:00 -0000
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--- Comment #2 from martin <mfe at live dot de> ---
>Can you even execute a simple hello world you compile yourself?
Yes (using /opt/gcc-7.3/bin/gcc).
>here (x86_64-linux) 126 is ENOKEY. Looks like somehow your platform requires
signed executables?
No, I already compiled many libraries and executables like libmpc,libgnutls,
curl,wget and never had any issues which mention to sign the executables.
>From gcc-bugs-return-614189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:49:48 2018
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Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
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--- Comment #21 from qinzhao at gcc dot gnu.org ---
the latest patch to this test bug has just been checked in at:
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=263983
>From gcc-bugs-return-614190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 14:51:47 2018
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Subject: [Bug middle-end/78809] Inline strcmp with small constant strings
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--- Comment #47 from qinzhao at gcc dot gnu.org ---
all the issues triggered by the previous patch have been fixed.
I am planing to close this PR as fixed.
>From gcc-bugs-return-614191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 15:03:16 2018
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Subject: [Bug target/37158] Wrong insn for _mm_comieq_sd
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-614192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 15:31:38 2018
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
There are three things going wrong:
1) You configure without having an assembler available. This will disable
various features in your compiler. The same happens on e.g. the x86 port.
2) We allow disabling fprnd independently from other things, That just raises
complexity enormously, without any real benefit. The same flag (TARGET_FPRND)
is used as a stand-in for ISA 2.04 in some places.
3) You end up getting ISA 2.04 insns disabled, but most VSX stuff enabled.
That should not happen.
1) is easy to fix: Do Not Do That Then.
2) and 3) will take time; but I have a band-aid to make the pain for PR86684
and this go away, which I'll commit in a bit.
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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Subject: [Bug lto/86517] relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object with LTO
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--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Aug 30 15:50:39 2018
New Revision: 263988
URL: https://gcc.gnu.org/viewcvs?rev=263988&root=gcc&view=rev
Log:
PR lto/86517
* lto-opts.c (lto_write_options): Always stream PIC/PIE mode.
* lto-wrapper.c (merge_and_complain): Fix merging of PIC/PIE.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lto-opts.c
trunk/gcc/lto-wrapper.c
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87103] [OOP] ICE in gfc_new_symbol() due to overlong symbol name
Date: Thu, 30 Aug 2018 16:50:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
CC| |janus at gcc dot gnu.org
Summary|ICE in gfc_new_symbol() due |[OOP] ICE in
|to overlong symbol name |gfc_new_symbol() due to
| |overlong symbol name
--- Comment #1 from janus at gcc dot gnu.org ---
(In reply to Andrew Benson from comment #0)
> The following code causes an ICE with gfortan 9.0.0 (r263855):
>
> [..]
>
> The problem seems to be that gfc_new_symbol() is passed a name
> '__tmp_class_namethatisverylongbutnottoolongthatitshouldbeinvalid' in this
> case which exceeds GFC_MAX_SYMBOL_LEN=64. My understanding is that the code
> is valid since the symbol name itself,
> 'namethatisverylongbutnottoolongthatitshouldbeinvalid', is less than 64
> characters.
>
> I'm not sure what the correct fix for this is - should the name length limit
> in gfc_new_symbol() just be increased by enough to allow the '__tmp_class_'
> prefix?
Yes, one could just bump GFC_MAX_SYMBOL_LEN to 64+12.
Btw, in the F08 standard I find:
C301 (R303) The maximum length of a name is 63 characters.
I guess GFC_MAX_SYMBOL_LEN needs to be 64 in order to account for null
termination.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87148] [6/7/8/9 Regression] backward compatibility issue to take char [] as incomplete type
Date: Thu, 30 Aug 2018 17:14:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The decision to reject the code in comment #0 was deliberate (as Jonathan
explained in comment #2). We wanted (and still do) G++ to enforce rules that
are at least as strict as C's (and GCC's in C mode).
The other test case:
struct Tst {
int i;
char t[];
};
Tst t = Tst();
arguably should be accepted because the equivalent
Tst t { };
is accepted.
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
Date: Thu, 30 Aug 2018 17:15:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |ASSIGNED
CC| |nathan at gcc dot gnu.org
Resolution|FIXED |---
Assignee|mpolacek at gcc dot gnu.org |nathan at gcc dot gnu.org
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
The code is actually well formed. the final final namespace decl reopens the
inline anon namespace!
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-invalid-code |ice-on-valid-code
--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Oop. Adjusting the keyword then.
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Subject: [Bug c++/87152] internal compiler error: in tsubst_copy, at cp/pt.c:15484
Date: Thu, 30 Aug 2018 17:36:00 -0000
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ensadc at mailnesia dot com changed:
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--- Comment #1 from ensadc at mailnesia dot com ---
Reduced:
template<bool ... bits>
int int_from_bits()
{
int a[1] = {};
for (int index = 0; int _ : a)
{
index;
}
return 0;
}
int j = int_from_bits<>();
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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87156] New: [9 Regression] ICE building libstdc++ for mips64
Date: Thu, 30 Aug 2018 17:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87156
Bug ID: 87156
Summary: [9 Regression] ICE building libstdc++ for mips64
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
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CC: hubicka at gcc dot gnu.org
Target Milestone: ---
Target: mips64-linux-gnu
Created attachment 44632
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44632&action=edit
Preprocessed source
I see the following ICE building libstdc++ for mips64-linux-gnu. Compile with:
-S -O2 -std=gnu++11 compatibility-c++0x.ii
Bisecting shows it first appearing with r263962, though I don't really see what
it has to do with that commit. Still fails as of r263983 (line numbers in this
backtrace are from that revision).
during GIMPLE pass: fnsplit
/scratch/jmyers/glibc/many9/src/gcc/libstdc++-v3/src/c++11/compatibility-c++0x.cc:
In function 'virtual std::error_condition
std::error_category::default_error_condition(int) const':
/scratch/jmyers/glibc/many9/src/gcc/libstdc++-v3/src/c++11/compatibility-c++0x.cc:256:1:
internal compiler error: Segmentation fault
256 | }
| ^
0xd71e5f crash_signal
/scratch/jmyers/glibc/many9/src/gcc/gcc/toplev.c:325
0x1036ca8 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/scratch/jmyers/glibc/many9/src/gcc/gcc/tree.h:3235
0x1036ca8 decl_function_context(tree_node const*)
/scratch/jmyers/glibc/many9/src/gcc/gcc/tree.c:8994
0x10d0cb7 mips_get_compress_mode
/scratch/jmyers/glibc/many9/src/gcc/gcc/config/mips/mips.c:1355
0x10d1fa8 mips_set_current_function
/scratch/jmyers/glibc/many9/src/gcc/gcc/config/mips/mips.c:19636
0xa6ba9b invoke_set_current_function_hook
/scratch/jmyers/glibc/many9/src/gcc/gcc/function.c:4616
0xa74533 invoke_set_current_function_hook
/scratch/jmyers/glibc/many9/src/gcc/gcc/function.c:4600
0xa74533 allocate_struct_function(tree_node*, bool)
/scratch/jmyers/glibc/many9/src/gcc/gcc/function.c:4729
0xe05d4d initialize_cfun
/scratch/jmyers/glibc/many9/src/gcc/gcc/tree-inline.c:2452
0xe05d4d tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, bool, bitmap_head*, bool, bitmap_head*, basic_block_def*)
/scratch/jmyers/glibc/many9/src/gcc/gcc/tree-inline.c:5833
0x92e80c cgraph_node::create_version_clone_with_body(vec<cgraph_edge*, va_heap,
vl_ptr>, vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, bool,
bitmap_head*, basic_block_def*, char const*)
/scratch/jmyers/glibc/many9/src/gcc/gcc/cgraphclones.c:984
0x58b18c split_function
/scratch/jmyers/glibc/many9/src/gcc/gcc/ipa-split.c:1330
0x14269d2 execute_split_functions
/scratch/jmyers/glibc/many9/src/gcc/gcc/ipa-split.c:1825
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87157] New: [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Thu, 30 Aug 2018 18:01:00 -0000
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Bug ID: 87157
Summary: [9 regression]
gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails
starting with r263981
Product: gcc
Version: 9.0
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On power 8/9 it fails like this:
> FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c scan-tree-dump-times vect "vectorized 1 loops" 1
On power 7 it fails like this:
> FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c scan-tree-dump-times vect "loop versioned for vectorization to enhance alignment" 1
> FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c scan-tree-dump-times vect "vectorized 1 loops" 1
Do the test cases just need updating?
make -k check-gcc
RUNTESTFLAGS=ppc-costmodel-vect.exp=gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c
# of expected passes 1
# of unexpected failures 1
FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c scan-tree-dump-times vect
"vectorized 1 loops" 1
r263981 | hubicka | 2018-08-30 07:58:42 -0500 (Thu, 30 Aug 2018) | 8 lines
* sreal.h (SREAL_PART_BITS): Change to 31; remove seemingly unnecessary
comment that it has to be even number.
(class sreal): Change m_sig type to int32_t.
* sreal.c (sreal::dump, sreal::to_int, opreator+, operator-): Use
int64_t for temporary calculations.
(sreal_verify_basics): Drop one bit from minimum and maximum.
>From gcc-bugs-return-614202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 18:08:11 2018
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Subject: [Bug testsuite/87158] New: FAIL gcc.c-torture/execute/memchr-1.c on big endian targets
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Bug ID: 87158
Summary: FAIL gcc.c-torture/execute/memchr-1.c on big endian
targets
Product: gcc
Version: 9.0
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The new runtime test memchr-1.c fails on the big-endian powerpc64. The initial
revision of the test wasn't right for big-endian targets but I thought I fixed
that so I may not have updated the posted patch before Jeff committed it in
r263963.
FAIL: gcc.c-torture/execute/memchr-1.c -O0 execution test
FAIL: gcc.c-torture/execute/memchr-1.c -O1 execution test
FAIL: gcc.c-torture/execute/memchr-1.c -O2 execution test
FAIL: gcc.c-torture/execute/memchr-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none execution test
FAIL: gcc.c-torture/execute/memchr-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects execution test
FAIL: gcc.c-torture/execute/memchr-1.c -O3 -g execution test
FAIL: gcc.c-torture/execute/memchr-1.c -Os execution test
>From gcc-bugs-return-614203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 18:18:28 2018
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Subject: [Bug testsuite/87158] FAIL gcc.c-torture/execute/memchr-1.c on big endian targets
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64-linux
CC| |law at gcc dot gnu.org
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Here's a patch:
diff --git a/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
b/gcc/testsuite/gcc.
index ec37632..54fae16 100644
--- a/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
@@ -139,9 +139,9 @@ void test_wide (void)
A (memchr (ws1, 0, sizeof ws1) == pws1 + 0);
A (memchr (&ws4[0], 0, nb) == pws4 + 0);
- A (memchr (&ws4[1], 0, nb - 1 * nwb) == pws4 + 1 * nwb + 0);
- A (memchr (&ws4[2], 0, nb - 2 * nwb) == pws4 + 2 * nwb + 1);
- A (memchr (&ws4[3], 0, nb - 3 * nwb) == pws4 + 3 * nwb + 2);
+ A (memchr (&ws4[1], 0, nb - 1 * nwb) == pws4 + 1 * nwb + 1);
+ A (memchr (&ws4[2], 0, nb - 2 * nwb) == pws4 + 2 * nwb + 2);
+ A (memchr (&ws4[3], 0, nb - 3 * nwb) == pws4 + 3 * nwb + 3);
#endif
}
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Subject: [Bug c++/87152] internal compiler error: in tsubst_copy, at cp/pt.c:15484
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-30
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-614205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 18:23:20 2018
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Subject: [Bug c++/87152] internal compiler error: in tsubst_copy, at cp/pt.c:15484
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with mine r260619, before it was of course rejected. But this version
template<bool ... bits>
int int_from_bits()
{
int a[1] = {};
int index = 0;
for (int _ : a)
{
index;
}
return 0;
}
int j = int_from_bits<>();
compiles fine. So mine, I guess. Not a regression though.
>From gcc-bugs-return-614206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 18:34:25 2018
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Subject: [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently
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--- Comment #3 from Ștefan Talpalaru <stefantalpalaru at yahoo dot com> ---
The problem persists in 8.2.0 and in current trunk. You need to run that
command a hundred of times or so, on a Piledriver, to replicate it:
for i in `seq 1 100`; do gcc -S t.c -march=native -v 2>&1 | grep lwp | sed -e
's/.*\(-m\(no-\)\?lwp\).*/\1/'; done | grep '\-mlwp' | wc -l
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Subject: [Bug fortran/85357] ICE on invalid code with equal procedure names
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--- Comment #7 from janus at gcc dot gnu.org ---
Further reduced test case for the ICE:
module base
implicit none
contains
subroutine summation(i)
integer, intent(in) :: i
end subroutine
end module
module extended
use base
implicit none
contains
subroutine summation()
end subroutine
end module
>From gcc-bugs-return-614208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 18:58:01 2018
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Subject: [Bug testsuite/87159] New: [9 regression] new test gcc.c-torture/execute/memchr-1.c fails starting with introduction in r263963
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Bug ID: 87159
Summary: [9 regression] new test
gcc.c-torture/execute/memchr-1.c fails starting with
introduction in r263963
Product: gcc
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These new tests fail on powerpc64 BE. They work fine on LE so this is probably
an endian problem.
> FAIL: gcc.c-torture/execute/memchr-1.c -O0 execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -O1 execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -O2 execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -O3 -g execution test
> FAIL: gcc.c-torture/execute/memchr-1.c -Os execution test
The failures are all:
assertion failed on line 142: memchr (&ws4[1], 0, nb - 1 * nwb) == pws4 + 1 *
nwb + 0
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Subject: [Bug testsuite/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
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--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I doubt the test cases need updating. Looks like this change had a surprising
side of effect of breaking vectorization for this test on Power, which needs to
be understood and fixed.
>From gcc-bugs-return-614210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 19:16:40 2018
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Subject: [Bug target/52034] __builtin_copysign optimization suboptimal
Date: Thu, 30 Aug 2018 19:16:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2012-01-29 00:00:00 |2018-8-30
Known to fail| |8.2.0
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
I don't understand why we keep UNSPEC_COPYSIGN so long, it is only expanded in
split2, after register allocation. Maybe splitting earlier into and+and+or
would help RA...
>From gcc-bugs-return-614211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 20:10:52 2018
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Subject: [Bug target/87160] New: Maybe miscompilation of a polyhedron test
Date: Thu, 30 Aug 2018 20:10:00 -0000
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Bug ID: 87160
Summary: Maybe miscompilation of a polyhedron test
Product: gcc
Version: 9.0
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All releases that support -march=broadwell cause segfault on following
polyhedron test-case:
gfortran -Ofast -g -march=broadwell test_fpu2.f90 -o b.out && gdb ./b.out
...
Program received signal SIGSEGV, Segmentation fault.
(gdb) bt
#0 0x0000000000402123 in crout (a=<error reading variable: value requires
32000000 bytes, which is more than max-value-size>, n=2000) at
test_fpu2.f90:168
#1 0x000000000040e555 in test_fpu () at test_fpu2.f90:79
#2 0x000000000040118d in main (argc=argc@entry=1, argv=0x7fffffffe428) at
test_fpu2.f90:12
#3 0x00007ffff7435feb in __libc_start_main (main=0x401170 <main>, argc=1,
argv=0x7fffffffe038, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffe028) at ../csu/libc-start.c:308
#4 0x00000000004011ea in _start () at ../sysdeps/x86_64/start.S:120
│0x402120 <crout_+272> add %rsi,%rcx
>│0x402123 <crout_+275> vmovdqu %ymm0,(%rdx)
│0x402127 <crout_+279> add $0x20,%rdx
│0x40212b <crout_+283> vpaddd %ymm1,%ymm0,%ymm0
Maybe Richi is interested in that?
-O3 works fine; I can reproduce that on Haswell using the march option value
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Subject: [Bug bootstrap/87141] configure:14586: error: Could not determine word size.
Date: Thu, 30 Aug 2018 20:36:00 -0000
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--- Comment #3 from martin <mfe at live dot de> ---
Created attachment 44633
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44633&action=edit
config.log of root gcc dir
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Subject: [Bug testsuite/87158] FAIL gcc.c-torture/execute/memchr-1.c on big endian targets
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r264000.
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Subject: [Bug testsuite/87158] FAIL gcc.c-torture/execute/memchr-1.c on big endian targets
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 87159 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 21:26:04 2018
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Subject: [Bug testsuite/87158] FAIL gcc.c-torture/execute/memchr-1.c on big endian targets
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Aug 30 21:25:10 2018
New Revision: 264000
URL: https://gcc.gnu.org/viewcvs?rev=264000&root=gcc&view=rev
Log:
PR testsuite/87158 - FAIL gcc.c-torture/execute/memchr-1.c on big endian
targets
gcc/testsuite/ChangeLog:
* gcc.c-torture/execute/memchr-1.c: Correct big-endian expectations.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.c-torture/execute/memchr-1.c
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Subject: [Bug testsuite/87159] [9 regression] new test gcc.c-torture/execute/memchr-1.c fails starting with introduction in r263963
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Resolved as a duplicate of bug 87158 (fixed in r264000).
*** This bug has been marked as a duplicate of bug 87158 ***
>From gcc-bugs-return-614217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 21:40:24 2018
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Subject: [Bug testsuite/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Thu, 30 Aug 2018 21:40:00 -0000
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Indeed, having -fdump-tree-vect-details-blocks dump would probably make it easy
to figure out what happens.
What is configuration tripplet and exact invocation line for the test?
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Subject: [Bug c++/87125] [9 Regression] ICE in tsubst_copy starting with r261084
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ensadc at mailnesia dot com changed:
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----------------------------------------------------------------------------
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--- Comment #2 from ensadc at mailnesia dot com ---
Reduced:
template<typename br> struct ch {
template<typename by> constexpr ch(by) noexcept(br());
};
class ce : ch<int> {
using ch::ch;
};
void f() {
noexcept(ce(0));
}
>From gcc-bugs-return-614219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 30 22:52:38 2018
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From: "P at draigBrady dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Thu, 30 Aug 2018 22:52:00 -0000
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--- Comment #11 from Pádraig Brady <P at draigBrady dot com> ---
I agree that -Wno-... should never be promoted to an error as we see with:
$ echo 'int maint(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror
-Wextra -Wno-error=return-type -
<stdin>: In function ‘maint’:
<stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
<stdin>: At top level:
cc1: error: unrecognized command line option ‘-Wno-unknown-warning-option’
[-Werror]
cc1: all warnings being treated as errors
However it's worth noting that one can suppress the other warnings entirely
that trigger the promotion. This may be ok as a workaround for some:
$ echo 'int maint(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror
-Wextra -Wno-return-type -
>From gcc-bugs-return-614220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 00:23:29 2018
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From: "nir.aizik at harman dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87161] New: if -Werror appear after -Wmissing-prototypes the warning is not turn into error
Date: Fri, 31 Aug 2018 00:23:00 -0000
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Bug ID: 87161
Summary: if -Werror appear after -Wmissing-prototypes the
warning is not turn into error
Product: gcc
Version: unknown
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Werror before Wmissing-prototypes gives:
g++ -c -Werror -Wmissing-prototypes test.c -o test.o
cc1plus: error: command line option ‘-Wmissing-prototypes’ is valid for C/ObjC
but not for C++ [-Werror]
cc1plus: all warnings being treated as errors
Werror after Wmissing-prototypes gives:
g++ -c -Wmissing-prototypes -Werror test.c -o test.o
cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for
C/ObjC but not for C++
I believe both options should end with error or at least this behavior should
be documented
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Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
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sandra at gcc dot gnu.org changed:
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--- Comment #1 from sandra at gcc dot gnu.org ---
This test also fails on nios2 (both nios2-elf and nios2-linux-gnu).
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Subject: [Bug c++/80916] Spurious "declared 'static' but never defined" warning
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--- Comment #3 from ensadc at mailnesia dot com ---
Reduced:
struct j {
virtual void dispatch(void *);
};
template <typename>
struct i : j {
void dispatch(void *);
};
namespace {
struct l : i<l> {};
}
void f(j *k) {
k->dispatch(0);
}
>From gcc-bugs-return-614223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:39:49 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
[...]
> I wonder if you can run the testsuite in the not bootstrapped tree
> and look for sth suspicious.
I did that now (c and c++ only), but nothing sprang to attention.
> There is uninitialized memory (but it should never be used...) in
> the new VN, so a shot in the dark would be
>
> Index: gcc/tree-ssa-sccvn.c
> ===================================================================
> --- gcc/tree-ssa-sccvn.c (revision 263972)
> +++ gcc/tree-ssa-sccvn.c (working copy)
> @@ -6240,7 +6240,7 @@ do_rpo_vn (function *fn, edge entry, bit
> for (int i = 0; i < n; ++i)
> bb_to_rpo[rpo[i]] = i;
>
> - unwind_state *rpo_state = XNEWVEC (unwind_state, n);
> + unwind_state *rpo_state = XCNEWVEC (unwind_state, n);
>
> rpo_elim avail (entry->dest);
> rpo_avail = &avail;
Also bootstrapped that right now: doesn't help. Seems I'll have to go
the valgrind route.
> What's your host compiler? Do you use custom STAGE1_CFLAGS?
Just a vanilla i386-pc-solaris2.11 gcc 7.1.0. Nothing special
(STAGE1_CFLAGS or other).
Besides, I've also tried amd64-pc-solaris2.11 and
sparcv9-sun-solaris2.11 bootstraps without libumem: both succeed without
issues, so this is a 32-bit thing only.
>From gcc-bugs-return-614224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:43:44 2018
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
Date: Fri, 31 Aug 2018 06:43:00 -0000
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--- Comment #22 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Fri Aug 31 06:43:07 2018
New Revision: 264007
URL: https://gcc.gnu.org/viewcvs?rev=264007&root=gcc&view=rev
Log:
Fix PR testsuite/86519 reference.
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:46:52 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
Date: Fri, 31 Aug 2018 06:46:00 -0000
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--- Comment #23 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #21 from qinzhao at gcc dot gnu.org ---
> the latest patch to this test bug has just been checked in at:
>
> https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=263983
There's no need for comments like this if you correctly format the PR
reference in the ChangeLog:
- PR 86519
+ PR testsuite/86519
If so, the PR automatically gets updated with the commit message. I've
fixed that now.
Rainer
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Subject: [Bug c/87162] New: [6.2.0] Internal compiler error: Error reporting routines re-entered.
Date: Fri, 31 Aug 2018 06:49:00 -0000
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Bug ID: 87162
Summary: [6.2.0] Internal compiler error: Error reporting
routines re-entered.
Product: gcc
Version: 6.2.0
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Target Milestone: ---
Created attachment 44634
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44634&action=edit
compile.sh
# ./compile.sh
cc1: warning: this target machine does not have delayed branches
*warn_unused_result : ON
*diagnose_omp_blocks : OFF
*diagnose_tm_blocks : ON
tree-omplower : ON
tree-lower : ON
tree-tmlower : ON
tree-ehopt : ON
tree-eh : ON
tree-cfg : ON
*warn_function_return : ON
tree-ompexp : ON
*build_cgraph_edges : ON
*free_lang_data : ON
ipa-visibility : ON
ipa-chkp_versioning : OFF
ipa-chkp_ecleanup : OFF
ipa-build_ssa_passes : ON
tree-fixup_cfg1 : ON
*init_datastructures : ON
tree-ssa : ON
*nonnullcmp : ON
tree-ubsan : OFF
*early_warn_uninitialized : ON
tree-nothrow : ON
ipa-chkp_passes : OFF
tree-fixup_cfg2 : ON
tree-chkp : OFF
*rebuild_cgraph_edges : ON
ipa-opt_local_passes : ON
tree-fixup_cfg3 : ON
*rebuild_cgraph_edges : ON
tree-inline_param1 : ON
tree-einline : ON
tree-early_optimizations : ON
*remove_cgraph_callee_edges : ON
tree-objsz1 : ON
tree-ccp1 : OFF
tree-forwprop1 : OFF
tree-esra : OFF
tree-ealias : ON
tree-fre1 : OFF
tree-mergephi1 : ON
tree-dse1 : OFF
tree-cddce1 : ON
tree-eipa_sra : ON
tree-tailr1 : ON
tree-switchconv : ON
tree-ehcleanup1 : OFF
tree-profile_estimate : OFF
tree-local-pure-const1 : OFF
tree-fnsplit : ON
tree-release_ssa : ON
*rebuild_cgraph_edges : ON
tree-inline_param2 : ON
ipa-ipa_oacc : OFF
ipa-pta1 : OFF
ipa-ipa_oacc_kernels : ON
tree-oacc_kernels : OFF
tree-ch1 : ON
tree-fre2 : OFF
tree-lim1 : ON
tree-dom1 : ON
tree-dce1 : ON
tree-parloops1 : OFF
tree-ompexpssa1 : ON
*rebuild_cgraph_edges : ON
ipa-chkp_cleanup : OFF
ipa-afdo : OFF
ipa-free-inline-summary : ON
ipa-profile : OFF
tree-feedback_fnsplit : OFF
ipa-increase_alignment : OFF
ipa-tmipa : ON
ipa-emutls : OFF
ipa-whole-program : ON
ipa-profile_estimate : ON
ipa-icf : OFF
ipa-devirt : OFF
ipa-cp : ON
ipa-cdtor : OFF
ipa-targetclone : ON
ipa-hsa : OFF
ipa-inline : ON
ipa-pure-const : OFF
ipa-static-var : ON
ipa-single-use : ON
ipa-comdats : ON
ipa-pta2 : OFF
ipa-dispachercalls : ON
ipa-simdclone : ON
tree-fixup_cfg4 : ON
tree-ehdisp : OFF
tree-oaccdevlow : ON
tree-omptargetlink : OFF
*all_optimizations : ON
*remove_cgraph_callee_edges : ON
*strip_predict_hints : ON
tree-ccp2 : OFF
tree-cunrolli : ON
tree-backprop : ON
tree-phiprop : ON
tree-forwprop2 : OFF
tree-objsz2 : ON
tree-alias : ON
tree-retslot : ON
tree-fre3 : OFF
tree-mergephi2 : ON
tree-vrp1 : ON
tree-chkpopt : OFF
tree-dce2 : ON
tree-stdarg : ON
tree-cdce : OFF
tree-cselim : ON
tree-copyprop1 : ON
tree-ifcombine : ON
tree-mergephi3 : ON
tree-phiopt1 : OFF
tree-tailr2 : ON
tree-ch2 : ON
tree-cplxlower1 : ON
tree-sra : OFF
tree-dom2 : ON
tree-isolate-paths : ON
tree-phicprop1 : ON
tree-dse2 : OFF
tree-reassoc1 : OFF
tree-dce3 : ON
tree-forwprop3 : OFF
tree-phiopt2 : OFF
tree-ccp3 : OFF
tree-sincos : ON
tree-bswap : ON
tree-laddress : ON
tree-crited1 : ON
tree-pre : ON
tree-sink : ON
tree-sancov1 : OFF
tree-asan1 : OFF
tree-tsan1 : OFF
tree-fix_loops : ON
tree-loop : ON
tree-loopinit : ON
tree-lim2 : ON
tree-copyprop2 : ON
tree-dce4 : ON
tree-unswitch : OFF
tree-sccp : OFF
*record_bounds : ON
tree-ldist : OFF
tree-copyprop3 : ON
tree-graphite0 : ON
tree-graphite : ON
tree-lim3 : ON
tree-copyprop4 : ON
tree-dce5 : ON
tree-ivcanon : ON
tree-parloops2 : OFF
tree-ompexpssa2 : ON
tree-ch_vect : OFF
tree-ifcvt : ON
tree-vect : OFF
tree-dce6 : ON
tree-pcom : ON
tree-cunroll : ON
tree-slp1 : ON
tree-aprefetch : OFF
tree-ivopts : ON
tree-lim4 : ON
tree-loopdone : ON
tree-no_loop : OFF
tree-slp2 : ON
tree-simduid1 : OFF
tree-veclower21 : ON
tree-recip : OFF
tree-reassoc2 : OFF
tree-slsr : OFF
tree-split-paths : ON
tree-tracer : ON
tree-dom3 : ON
tree-strlen : ON
tree-vrp2 : ON
tree-phicprop2 : ON
tree-cddce2 : ON
tree-dse3 : OFF
tree-forwprop4 : OFF
tree-phiopt3 : OFF
tree-fab1 : ON
tree-widening_mul : ON
tree-tailc : ON
tree-dce7 : ON
tree-crited2 : ON
tree-uninit1 : ON
tree-uncprop1 : ON
tree-local-pure-const2 : OFF
*all_optimizations_g : OFF
*remove_cgraph_callee_edges : ON
*strip_predict_hints : ON
tree-cplxlower2 : ON
tree-veclower22 : ON
tree-ccp4 : OFF
tree-objsz3 : ON
tree-fab2 : ON
tree-copyprop5 : ON
tree-dce8 : ON
tree-sancov2 : OFF
tree-asan2 : OFF
tree-tsan2 : OFF
tree-crited3 : ON
tree-uninit2 : ON
tree-uncprop2 : ON
tree-local-pure-const3 : OFF
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-614227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:50:19 2018
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From: "yellowriver2010 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
Date: Fri, 31 Aug 2018 06:50:00 -0000
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Wen Yang <yellowriver2010 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |yellowriver2010 at hotmail dot com
--- Comment #1 from Wen Yang <yellowriver2010 at hotmail dot com> ---
Created attachment 44635
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44635&action=edit
applets.i
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86760] [8/9 Regression] FORTRAN: polymorphic arrays inside a user-defined type generate segmentation faults
Date: Fri, 31 Aug 2018 06:52:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Aug 31 06:51:31 2018
New Revision: 264008
URL: https://gcc.gnu.org/viewcvs?rev=264008&root=gcc&view=rev
Log:
2018-08-31 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* trans-array.c (gfc_conv_scalarized_array_ref): Do not fix
info->descriptor but pass it directly to gfc_build_array_ref.
(gfc_conv_array_ref): Likewise for se->expr.
* trans.c (gfc_build_array_ref): If 'decl' is a COMPONENT_REF
obtain the span field directly from it.
2018-08-31 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* gfortran.dg/pr86328.f90 : New test.
in comment 12 of the PR.
* gfortran.dg/pr86760.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr86328.f90
trunk/gcc/testsuite/gfortran.dg/pr86760.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:52:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Fri, 31 Aug 2018 06:52:00 -0000
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--- Comment #13 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Aug 31 06:51:31 2018
New Revision: 264008
URL: https://gcc.gnu.org/viewcvs?rev=264008&root=gcc&view=rev
Log:
2018-08-31 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* trans-array.c (gfc_conv_scalarized_array_ref): Do not fix
info->descriptor but pass it directly to gfc_build_array_ref.
(gfc_conv_array_ref): Likewise for se->expr.
* trans.c (gfc_build_array_ref): If 'decl' is a COMPONENT_REF
obtain the span field directly from it.
2018-08-31 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* gfortran.dg/pr86328.f90 : New test.
in comment 12 of the PR.
* gfortran.dg/pr86760.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr86328.f90
trunk/gcc/testsuite/gfortran.dg/pr86760.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 06:59:09 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86760] [8/9 Regression] FORTRAN: polymorphic arrays inside a user-defined type generate segmentation faults
Date: Fri, 31 Aug 2018 06:59:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Since I am fixing it, I might as well take it :-)
Paul
>From gcc-bugs-return-614231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 07:00:04 2018
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Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #14 from Paul Thomas <pault at gcc dot gnu.org> ---
Since I am fixing it, I might as well take it :-)
Paul
>From gcc-bugs-return-614232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 07:23:01 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Fri, 31 Aug 2018 07:23:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 31 Aug 2018, ro at CeBiTec dot Uni-Bielefeld.DE wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87134
>
> --- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> > --- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
> [...]
> > I wonder if you can run the testsuite in the not bootstrapped tree
> > and look for sth suspicious.
>
> I did that now (c and c++ only), but nothing sprang to attention.
>
> > There is uninitialized memory (but it should never be used...) in
> > the new VN, so a shot in the dark would be
> >
> > Index: gcc/tree-ssa-sccvn.c
> > ===================================================================
> > --- gcc/tree-ssa-sccvn.c (revision 263972)
> > +++ gcc/tree-ssa-sccvn.c (working copy)
> > @@ -6240,7 +6240,7 @@ do_rpo_vn (function *fn, edge entry, bit
> > for (int i = 0; i < n; ++i)
> > bb_to_rpo[rpo[i]] = i;
> >
> > - unwind_state *rpo_state = XNEWVEC (unwind_state, n);
> > + unwind_state *rpo_state = XCNEWVEC (unwind_state, n);
> >
> > rpo_elim avail (entry->dest);
> > rpo_avail = &avail;
>
> Also bootstrapped that right now: doesn't help. Seems I'll have to go
> the valgrind route.
>
> > What's your host compiler? Do you use custom STAGE1_CFLAGS?
>
> Just a vanilla i386-pc-solaris2.11 gcc 7.1.0. Nothing special
> (STAGE1_CFLAGS or other).
Hmm, GCC 7.1.0 of course makes me raise eyebrows. Do you by chance
have another host compiler to cross-test whether it's a host compiler
issue?
>From gcc-bugs-return-614233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 07:26:01 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Fri, 31 Aug 2018 07:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87134
--- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
[...]
>> > What's your host compiler? Do you use custom STAGE1_CFLAGS?
>>
>> Just a vanilla i386-pc-solaris2.11 gcc 7.1.0. Nothing special
>> (STAGE1_CFLAGS or other).
>
> Hmm, GCC 7.1.0 of course makes me raise eyebrows. Do you by chance
> have another host compiler to cross-test whether it's a host compiler
> issue?
Sure: I can try with GCC 8.1.0, too.
>From gcc-bugs-return-614234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 07:49:58 2018
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Subject: [Bug middle-end/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Fri, 31 Aug 2018 07:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87138
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Aug 31 07:49:12 2018
New Revision: 264009
URL: https://gcc.gnu.org/viewcvs?rev=264009&root=gcc&view=rev
Log:
PR middle-end/87138
* expmed.c (expand_mult_const): Use immed_wide_int_const instead of
gen_int_mode. Formatting fixes.
* gcc.target/i386/avx512bw-pr87138.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512bw-pr87138.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expmed.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:33:54 2018
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Subject: [Bug middle-end/86505] [6/7/8 Regression] __builtin_va_arg_pack_len() computes the number of arguments wrongly
Date: Fri, 31 Aug 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86505
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
>From gcc-bugs-return-614237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:35:20 2018
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Subject: [Bug tree-optimization/86945] [8 Regression] BUG with optimisation of select case statement in gfortran
Date: Fri, 31 Aug 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86945
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
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Subject: [Bug tree-optimization/86816] [8 Regression] ICE: SIGSEGV in tree-ssa-pre / tail_merge_optimize
Date: Fri, 31 Aug 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86816
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
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Subject: [Bug ipa/87024] [6/7/8 Regression] ICE in fold_stmt_1
Date: Fri, 31 Aug 2018 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87024
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
>From gcc-bugs-return-614240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:35:21 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86927] [8 Regression] Gcc miscompiles at -O3 on valid code
Date: Fri, 31 Aug 2018 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86927
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
>From gcc-bugs-return-614239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:35:21 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86456] [8 Regression] Segfault in switch_to_section at gcc/varasm.c:7353 since r259317
Date: Fri, 31 Aug 2018 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86456
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 08:33:14 2018
New Revision: 264010
URL: https://gcc.gnu.org/viewcvs?rev=264010&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
2018-08-23 Richard Biener <rguenther@suse.de>
PR middle-end/87024
* tree-inline.c (copy_bb): Drop unused __builtin_va_arg_pack_len
calls.
* gcc.dg/pr87024.c: New testcase.
2018-08-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/86945
* tree-cfg.c (generate_range_test): Use unsigned arithmetic.
* gcc.dg/torture/pr86945.c: New testcase.
2018-08-17 Richard Biener <rguenther@suse.de>
PR middle-end/86505
* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
across a va-arg-pack using call adjust its return value accordingly.
* gcc.dg/torture/pr86505.c: New testcase.
2018-08-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/86816
* tree-ssa-tail-merge.c (tail_merge_valueize): New function
which checks for value availability before querying it.
(gvn_uses_equal): Use it.
(same_succ_hash): Likewise.
(gimple_equal_p): Likewise.
* g++.dg/torture/pr86816.C: New testcase.
2018-07-17 Richard Biener <rguenther@suse.de>
PR lto/86456
* dwarf2out.c (init_sections_and_labels): Always generate
a debug_line_str_section for early LTO debug.
(dwarf2out_finish): Reset debug_line_str_hash output early.
Bump counter for extra dwarf5 .debug_loc labels to not conflict
with fat LTO part.
(dwarf2out_early_finish): Output debug_line_str.
* g++.dg/debug/dwarf2/pr86456.C: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr86456.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/torture/pr86816.C
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87024.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86505.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr86945.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dwarf2out.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-cfg.c
branches/gcc-8-branch/gcc/tree-inline.c
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
branches/gcc-8-branch/gcc/tree-vect-loop.c
>From gcc-bugs-return-614241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:36:37 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86456] [8 Regression] Segfault in switch_to_section at gcc/varasm.c:7353 since r259317
Date: Fri, 31 Aug 2018 08:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86456
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
Known to fail| |8.2.0
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:39:39 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86816] [8 Regression] ICE: SIGSEGV in tree-ssa-pre / tail_merge_optimize
Date: Fri, 31 Aug 2018 08:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 08:40:37 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Fri, 31 Aug 2018 08:40:00 -0000
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
>> Hmm, GCC 7.1.0 of course makes me raise eyebrows. Do you by chance
>> have another host compiler to cross-test whether it's a host compiler
>> issue?
>
> Sure: I can try with GCC 8.1.0, too.
Just did that on i386-pc-solaris2.11: same ICE in compute_fn_summary, at
ipa-fnsummary.c:2492.
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Subject: [Bug tree-optimization/86927] [8 Regression] Gcc miscompiles at -O3 on valid code
Date: Fri, 31 Aug 2018 08:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86927
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/86945] [8 Regression] BUG with optimisation of select case statement in gfortran
Date: Fri, 31 Aug 2018 08:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/87149] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Fri, 31 Aug 2018 08:52:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Aug 31 08:52:13 2018
New Revision: 264011
URL: https://gcc.gnu.org/viewcvs?rev=264011&root=gcc&view=rev
Log:
rs6000: Make lround<mode>di2 depend on TARGET_FPRND (PR86684)
TARGET_FPRND should be on for everything ISA 2.04 and later, and
TARGET_VSX implies ISA 2.06 or later; but it is possible to disable
TARGET_FPRND (separately via -mno-fprnd, but also implicitly)
currently, and then things fall down. This patch makes things not
fall down.
PR target/86684
PR target/87149
* config/rs6000/rs6000.md (lround<mode>di2): Gate on TARGET_FPRND.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
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Subject: [Bug target/86684] ICE in extract_insn, at recog.c:2304 on ppc64le
Date: Fri, 31 Aug 2018 08:52:00 -0000
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Aug 31 08:52:13 2018
New Revision: 264011
URL: https://gcc.gnu.org/viewcvs?rev=264011&root=gcc&view=rev
Log:
rs6000: Make lround<mode>di2 depend on TARGET_FPRND (PR86684)
TARGET_FPRND should be on for everything ISA 2.04 and later, and
TARGET_VSX implies ISA 2.06 or later; but it is possible to disable
TARGET_FPRND (separately via -mno-fprnd, but also implicitly)
currently, and then things fall down. This patch makes things not
fall down.
PR target/86684
PR target/87149
* config/rs6000/rs6000.md (lround<mode>di2): Gate on TARGET_FPRND.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
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Subject: [Bug target/87133] ICE in aggregate_value_p with -frounding-math on ppc64le
Date: Fri, 31 Aug 2018 08:54:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Having proper assembler, I can't reproduce that.
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Subject: [Bug target/87163] New: ICE in extract_insn, at recog.c:2305
Date: Fri, 31 Aug 2018 08:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87163
Bug ID: 87163
Summary: ICE in extract_insn, at recog.c:2305
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: ppc64le-linux-gnu
Now having proper AS, I see:
$ ppc64le-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/signbit-1.c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/signbit-1.c: In
function ‘do_signbit_if’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/signbit-1.c:8:1:
error: unrecognizable insn:
8 | int do_signbit_if (__ibm128 a) { return __builtin_signbit (a); }
| ^~~
(insn 7 6 8 2 (set (reg:DF 125)
(float_truncate:DF (reg:IF 124)))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/signbit-1.c":8
-1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/signbit-1.c:8:1:
internal compiler error: in extract_insn, at recog.c:2305
0x55c83d _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/rtl-error.c:108
0x55c859 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/rtl-error.c:116
0x55bd32 extract_insn(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/recog.c:2305
0x79dabf instantiate_virtual_regs_in_insn
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/function.c:1605
0x79dabf instantiate_virtual_regs
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/function.c:1975
0x79dabf execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/function.c:2024
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87164] New: ICE in output_1236, at config/rs6000/vsx.md:3236
Date: Fri, 31 Aug 2018 08:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87164
Bug ID: 87164
Summary: ICE in output_1236, at config/rs6000/vsx.md:3236
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: ppc64le-linux-gnu
Having proper AS I see:
$ ppc64le-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/builtins-3-runnable.c
-mpower9-vector -mno-direct-move -O
ppc64le-linux-gnu-gcc: warning: ‘-mno-direct-move’ is deprecated
cc1: warning: ‘-mno-direct-move’ is deprecated
during RTL pass: final
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/builtins-3-runnable.c:
In function ‘test_ll_int_result’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/builtins-3-runnable.c:98:1:
internal compiler error: in output_1236, at config/rs6000/vsx.md:3236
98 | }
| ^
0x56e55b output_1236
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/config/rs6000/vsx.md:3236
0x76f724 final_scan_insn_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/final.c:3036
0x76fc38 final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/final.c:3149
0x76fefc final_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/final.c:2019
0x770914 rest_of_handle_final
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/final.c:4660
0x770914 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/final.c:4734
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug c/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
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--- Comment #2 from Wen Yang <yellowriver2010 at hotmail dot com> ---
0x8837da lhd_decl_printable_name(tree_node*, int)
../../gcc-6.2.0/gcc/langhooks.c:222
0x883a36 lhd_print_error_function(diagnostic_context*, char const*,
diagnostic_info*)
../../gcc-6.2.0/gcc/langhooks.c:397
0xa05180 default_tree_diagnostic_starter
../../gcc-6.2.0/gcc/tree-diagnostic.c:48
0x1016f7c diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc-6.2.0/gcc/diagnostic.c:824
0x101848d internal_error(char const*, ...)
../../gcc-6.2.0/gcc/diagnostic.c:1258
0x1016903 fancy_abort(char const*, int, char const*)
../../gcc-6.2.0/gcc/diagnostic.c:1327
0x8837da lhd_decl_printable_name(tree_node*, int)
../../gcc-6.2.0/gcc/langhooks.c:222
0x883a36 lhd_print_error_function(diagnostic_context*, char const*,
diagnostic_info*)
../../gcc-6.2.0/gcc/langhooks.c:397
0xa05180 default_tree_diagnostic_starter
../../gcc-6.2.0/gcc/tree-diagnostic.c:48
0x1016f7c diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc-6.2.0/gcc/diagnostic.c:824
0x101848d internal_error(char const*, ...)
../../gcc-6.2.0/gcc/diagnostic.c:1258
0x9c817f crash_signal
../../gcc-6.2.0/gcc/toplev.c:333
0x6f116e calculate_dominance_info(cdi_direction)
../../gcc-6.2.0/gcc/dominance.c:633
0x9cf05a gate_tm_init
../../gcc-6.2.0/gcc/trans-mem.c:2100
0x91808d dump_one_pass
../../gcc-6.2.0/gcc/passes.c:908
0x91808d dump_pass_list
../../gcc-6.2.0/gcc/passes.c:930
0x918c14 gcc::pass_manager::dump_passes() const
../../gcc-6.2.0/gcc/passes.c:957
0x6bf708 symbol_table::finalize_compilation_unit()
../../gcc-6.2.0/gcc/cgraphunit.c:2538
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Subject: [Bug c++/87165] Did you mean hints candidates equality
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-614252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:28:08 2018
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Subject: [Bug c++/87165] New: Did you mean hints candidates equality
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Bug ID: 87165
Summary: Did you mean hints candidates equality
Product: gcc
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Hi David.
Richi pointed out that for some wrong options the hint is not ideal. Let's
consider:
./xgcc -B. -c /tmp/empty.c -std=c++19
xgcc: error: unrecognized command line option ‘-std=c++19’; did you mean
‘-std=c++11’?
Valid candidates with one character diff are:
-std=c++11
-std=c++14
-std=c++17
-std=c++1y
-std=c++1z
Maybe we can prioritize the biggest number? Or closest according to character
diffrence '9' - '7' ?
>From gcc-bugs-return-614254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:33:16 2018
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Or in this case
xgcc: error: unrecognized command line option ‘-std=c++19’; valid options for
-std= include "c++11, c++14, c++17, c++1y, c++1z"
instead of "did you mean" if there's no clear winner.
>From gcc-bugs-return-614255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:35:18 2018
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably happens even with an empty CU since it ICEs in dump_pass_list.
>From gcc-bugs-return-614257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:36:53 2018
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Subject: [Bug c++/87161] if -Werror appear after -Wmissing-prototypes the warning is not turn into error
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Last reconfirmed| |2018-08-31
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I think we shouldn't Werror for this kind of thing.
>From gcc-bugs-return-614256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:36:12 2018
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Subject: [Bug gcov-profile/83877] Make gcov accept a path to the gcda and a path to the gcno file
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I see your use case but as mentioned I don't want to do gcov over complex about
locations. Hope you can live with the symlink creation.
>From gcc-bugs-return-614258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:37:47 2018
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
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Subject: [Bug target/87156] [9 Regression] ICE building libstdc++ for mips64
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Subject: [Bug target/87164] ICE in output_1236, at config/rs6000/vsx.md:3236
Date: Fri, 31 Aug 2018 09:40:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/87163] ICE in extract_insn, at recog.c:2305
Date: Fri, 31 Aug 2018 09:43:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
/usr/bin/powerpc64le-suse-linux-as --version
GNU assembler (GNU Binutils; openSUSE Tumbleweed) 2.31
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `powerpc64le-suse-linux'.
>From gcc-bugs-return-614262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 09:46:19 2018
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Subject: [Bug target/87160] Maybe miscompilation of a polyhedron test
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Issue is as simple as missing ulimit -s unlimited.
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Subject: [Bug target/87164] ICE in output_1236, at config/rs6000/vsx.md:3236
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Caused by r263614.
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Subject: [Bug target/87164] ICE in output_1236, at config/rs6000/vsx.md:3236
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Then mine.
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Subject: [Bug tree-optimization/87166] New: 454.calculix benchmark is much slower on -Ofast with PGO or LTO
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87166
Bug ID: 87166
Summary: 454.calculix benchmark is much slower on -Ofast with
PGO or LTO
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jamborm at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
Host: x86_64-linux-gnu
Seen on multiple GCC releases and different CPUs (Intel Haswell and AMD Zen).
For PGO it goes from 197.860 to 455.025 seconds.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Subject: [Bug tree-optimization/87166] 454.calculix benchmark is much slower on -Ofast with PGO or LTO
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-31
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I hope I found the root cause:
perf report
-Ofast:
# Overhead Command Shared Object Symbol
# ........ ............... ............................
........................................
#
44.48% calculix_peak.a calculix_peak.amd64-m64-mine [.] e_c3d_
18.77% calculix_peak.a calculix_peak.amd64-m64-mine [.] DVdot33
6.82% calculix_peak.a calculix_peak.amd64-m64-mine [.]
Network_findAugmentingPath
-Ofast with PGO:
# Overhead Command Shared Object Symbol
# ........ ............... ............................
........................................
#
75.30% calculix_peak.a calculix_peak.amd64-m64-mine [.] e_c3d_.cold.0
7.53% calculix_peak.a calculix_peak.amd64-m64-mine [.] DVdot33
2.58% calculix_peak.a calculix_peak.amd64-m64-mine [.]
Network_findAugmentingPath
1.63% calculix_peak.a calculix_peak.amd64-m64-mine [.] nident_
So part of the function is put into cold text section. Reason is that train and
reference run
have totally different coverage. The most hottest code in ref run is never
executed in train run:
e_c3d.f.gcov:
TRAIN run:
#####: 591: sm(ii1+2,jj1+2)=sm(ii1,jj1)
-: 592: endif
-: 593:!
-: 594: else
-: 595:!
-: 596:! buckling matrix
-: 597:!
-: 598: senergyb=
-: 599: & (s11b*w(1,1)+s12b*(w(1,2)+w(2,1))
-: 600: & +s13b*(w(1,3)+w(3,1))+s22b*w(2,2)
#####: 601: &
+s23b*(w(2,3)+w(3,2))+s33b*w(3,3))*weight
#####: 602: sm(ii1,jj1)=sm(ii1,jj1)-senergyb
#####: 603:
sm(ii1+1,jj1+1)=sm(ii1+1,jj1+1)-senergyb
#####: 604:
sm(ii1+2,jj1+2)=sm(ii1+2,jj1+2)-senergyb
-: 605:!
-: 606: endif
-: 607:!
5M: 608: ii1=ii1+3
-: 609: enddo
449k: 610: jj1=jj1+3
-: 611: enddo
-: 612: else
-: 613:!
-: 614:! stiffness matrix for static and modal
-: 615:! 2nd order calculations
-: 616:!
-: 617:! large displacement stiffness
-: 618:!
#####: 619: do i1=1,3
#####: 620: do j1=1,3
#####: 621: vo(i1,j1)=0.d0
#####: 622: do k1=1,nope
#####: 623:
vo(i1,j1)=vo(i1,j1)+shp(j1,k1)*voldl(i1,k1)
-: 624: enddo
-: 625: enddo
-: 626: enddo
-: 627:!
#####: 628: if(mattyp.eq.1) then
#####: 629: call wcoef(v,vo,al,um)
-: 630: endif
-: 631:!
-: 632:! calculating the total mass of the element for
-: 633:! lumping purposes: only for explicit nonlinear
-: 634:! dynamic calculations
-: 635:!
#####: 636: if(mass.and.(iexpl.eq.1)) then
#####: 637: summass=summass+rho*xsj
-: 638: endif
-: 639:!
#####: 640: jj1=1
#####: 641: do jj=1,nope
-: 642:!
#####: 643: ii1=1
#####: 644: do ii=1,jj
-: 645:!
-: 646:! all products of the shape functions for a
given ii
-: 647:! and jj
-: 648:!
#####: 649: do i1=1,3
#####: 650: do j1=1,3
#####: 651: w(i1,j1)=shpj(i1,ii)*shpj(j1,jj)
-: 652: enddo
-: 653: enddo
-: 654:!
#####: 655: if(mattyp.eq.1) then
-: 656:!
#####: 657: do m1=1,3
#####: 658: do m2=1,3
#####: 659: do m3=1,3
#####: 660: do m4=1,3
-: 661: s(ii1+m2-1,jj1+m1-1)=
-: 662: & s(ii1+m2-1,jj1+m1-1)
#####: 663: &
+v(m4,m3,m2,m1)*w(m4,m3)*weight
-: 664: enddo
-: 665: enddo
-: 666: enddo
-: 667: enddo
-: 668:!
#####: 669: elseif(mattyp.eq.2) then
-: 670:!
#####: 671: call
orthonl(w,vo,elas,s,ii1,jj1,weight)
-: 672:!
-: 673: else
-: 674:!
#####: 675: do i1=1,3
#####: 676: iii1=ii1+i1-1
#####: 677: do j1=1,3
#####: 678: jjj1=jj1+j1-1
#####: 679: do k1=1,3
#####: 680: do l1=1,3
-: 681: s(iii1,jjj1)=s(iii1,jjj1)
#####: 682: &
+anisox(i1,k1,j1,l1)*w(k1,l1)*weight
#####: 683: do m1=1,3
-: 684: s(iii1,jjj1)=s(iii1,jjj1)
-: 685: &
+anisox(i1,k1,m1,l1)*w(k1,l1)
-: 686: & *vo(j1,m1)*weight
-: 687: &
+anisox(m1,k1,j1,l1)*w(k1,l1)
#####: 688: & *vo(i1,m1)*weight
#####: 689: do n1=1,3
-: 690: s(iii1,jjj1)=s(iii1,jjj1)
-: 691: & +anisox(m1,k1,n1,l1)
-: 692: &
*w(k1,l1)*vo(i1,m1)*vo(j1,n1)
#####: 693: & *weight
-: 694: enddo
-: 695: enddo
-: 696: enddo
-: 697: enddo
-: 698: enddo
-: 699: enddo
-: 700:!SPEC: The immediately preceding loop nest is also available in
-: 701:!SPEC: program-generated (much longer) form from the author's
-: 702:!SPEC: website (see 454.calculix/Docs) in file anisonl.f
-: 703:!SPEC:
-: 704:!SPEC: call
anisonl(w,vo,elas,s,ii1,jj1,weight)
-: 705:!SPEC:
-: 706: endif
-: 707:!
-: 708:! stress stiffness
-: 709:!
-: 710: senergy=
REF run:
#####: 591: sm(ii1+2,jj1+2)=sm(ii1,jj1)
-: 592: endif
-: 593:!
-: 594: else
-: 595:!
-: 596:! buckling matrix
-: 597:!
-: 598: senergyb=
-: 599: & (s11b*w(1,1)+s12b*(w(1,2)+w(2,1))
-: 600: & +s13b*(w(1,3)+w(3,1))+s22b*w(2,2)
#####: 601: &
+s23b*(w(2,3)+w(3,2))+s33b*w(3,3))*weight
#####: 602: sm(ii1,jj1)=sm(ii1,jj1)-senergyb
#####: 603:
sm(ii1+1,jj1+1)=sm(ii1+1,jj1+1)-senergyb
#####: 604:
sm(ii1+2,jj1+2)=sm(ii1+2,jj1+2)-senergyb
-: 605:!
-: 606: endif
-: 607:!
#####: 608: ii1=ii1+3
-: 609: enddo
#####: 610: jj1=jj1+3
-: 611: enddo
-: 612: else
-: 613:!
-: 614:! stiffness matrix for static and modal
-: 615:! 2nd order calculations
-: 616:!
-: 617:! large displacement stiffness
-: 618:!
11M: 619: do i1=1,3
36M: 620: do j1=1,3
25M: 621: vo(i1,j1)=0.d0
532M: 622: do k1=1,nope
523M: 623:
vo(i1,j1)=vo(i1,j1)+shp(j1,k1)*voldl(i1,k1)
-: 624: enddo
-: 625: enddo
-: 626: enddo
-: 627:!
3M: 628: if(mattyp.eq.1) then
1M: 629: call wcoef(v,vo,al,um)
-: 630: endif
-: 631:!
-: 632:! calculating the total mass of the element for
-: 633:! lumping purposes: only for explicit nonlinear
-: 634:! dynamic calculations
-: 635:!
3M*: 636: if(mass.and.(iexpl.eq.1)) then
#####: 637: summass=summass+rho*xsj
-: 638: endif
-: 639:!
3M: 640: jj1=1
58M: 641: do jj=1,nope
-: 642:!
55M: 643: ii1=1
637M: 644: do ii=1,jj
-: 645:!
-: 646:! all products of the shape functions for a
given ii
-: 647:! and jj
-: 648:!
2G: 649: do i1=1,3
8G: 650: do j1=1,3
7G: 651: w(i1,j1)=shpj(i1,ii)*shpj(j1,jj)
-: 652: enddo
-: 653: enddo
-: 654:!
582M: 655: if(mattyp.eq.1) then
-: 656:!
1G: 657: do m1=1,3
4G: 658: do m2=1,3
11G: 659: do m3=1,3
33G: 660: do m4=1,3
-: 661: s(ii1+m2-1,jj1+m1-1)=
-: 662: & s(ii1+m2-1,jj1+m1-1)
31G: 663: &
+v(m4,m3,m2,m1)*w(m4,m3)*weight
-: 664: enddo
-: 665: enddo
-: 666: enddo
-: 667: enddo
-: 668:!
299M: 669: elseif(mattyp.eq.2) then
-: 670:!
3M: 671: call
orthonl(w,vo,elas,s,ii1,jj1,weight)
-: 672:!
-: 673: else
-: 674:!
1G: 675: do i1=1,3
889M: 676: iii1=ii1+i1-1
4G: 677: do j1=1,3
3G: 678: jjj1=jj1+j1-1
12G: 679: do k1=1,3
35G: 680: do l1=1,3
-: 681: s(iii1,jjj1)=s(iii1,jjj1)
24G: 682: &
+anisox(i1,k1,j1,l1)*w(k1,l1)*weight
104G: 683: do m1=1,3
-: 684: s(iii1,jjj1)=s(iii1,jjj1)
-: 685: &
+anisox(i1,k1,m1,l1)*w(k1,l1)
-: 686: & *vo(j1,m1)*weight
-: 687: &
+anisox(m1,k1,j1,l1)*w(k1,l1)
72G: 688: & *vo(i1,m1)*weight
312G: 689: do n1=1,3
-: 690: s(iii1,jjj1)=s(iii1,jjj1)
-: 691: & +anisox(m1,k1,n1,l1)
-: 692: &
*w(k1,l1)*vo(i1,m1)*vo(j1,n1)
288G: 693: & *weight
-: 694: enddo
-: 695: enddo
-: 696: enddo
-: 697: enddo
-: 698: enddo
-: 699: enddo
-: 700:!SPEC: The immediately preceding loop nest is also available in
-: 701:!SPEC: program-generated (much longer) form from the author's
-: 702:!SPEC: website (see 454.calculix/Docs) in file anisonl.f
-: 703:!SPEC:
-: 704:!SPEC: call
anisonl(w,vo,elas,s,ii1,jj1,weight)
-: 705:!SPEC:
-: 706: endif
-: 707:!
-: 708:! stress stiffness
-: 709:!
-: 710: senergy=
The hottest part are line 689-693 which execute 300G times in reference run.
Because of the code
is not executed in train run we optimize it for size.
>From gcc-bugs-return-614268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:07:15 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Fri, 31 Aug 2018 11:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
Bug 26163 depends on bug 87166, which changed state.
Bug 87166 Summary: 454.calculix benchmark is much slower on -Ofast with PGO or LTO
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87166
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-614267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:07:06 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87166] 454.calculix benchmark is much slower on -Ofast with PGO or LTO
Date: Fri, 31 Aug 2018 11:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87166
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
As agreed on with Martin Jambor on IRC, let's close it as won't fix.
>From gcc-bugs-return-614269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:27:02 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/87161] if -Werror appear after -Wmissing-prototypes the warning is not turn into error
Date: Fri, 31 Aug 2018 11:27:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |driver
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This isn't specific to -Wmissing-prototypes or to C++, it happens for any
option that isn't valid for the current language e.g.
g++ -Werror -Wduplicate-decl-specifier ...
gcc -Werror -Wc++14-compat ...
The behaviour is fairly intuitive. While processing the command-line arguments
if an unknown/invalid option is encountered there is a warning. After -Werror
has been seen, all warnings are errors (including warnings about
unknown/invalid options).
>From gcc-bugs-return-614270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:28:14 2018
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Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-31
Ever confirmed|0 |1
>From gcc-bugs-return-614271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:39:03 2018
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Subject: [Bug middle-end/46935] We should recognize expanded switch statement and convert 2 way switch statements into shift & mask test
Date: Fri, 31 Aug 2018 11:39:00 -0000
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #5)
> > I know Tom de Vries is working on this problem and has a prototype patch.
> > He'll be posting his work for 4.7.
>
> http://gcc.gnu.org/ml/gcc-patches/2011-01/msg00959.html
Does it still apply for gcc 9?
>From gcc-bugs-return-614272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 11:44:58 2018
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Subject: [Bug driver/87161] if -Werror appear after -Wmissing-prototypes the warning is not turn into error
Date: Fri, 31 Aug 2018 11:44:00 -0000
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--- Comment #3 from Nir Aizik <niraizik at gmail dot com> ---
I think what make it counter-intuitive is that warning from valid option the
order of Werror is not important
example:
g++ -c -Wunused-variable -Werror test.cpp -o test.o
test.cpp: In function ‘int main(int, char**)’:
test.cpp:4:7: error: unused variable ‘i’ [-Werror=unused-variable]
int i;
^
cc1plus: all warnings being treated as errors
g++ -c -Werror -Wunused-variable test.cpp -o test.o
test.cpp: In function ‘int main(int, char**)’:
test.cpp:4:7: error: unused variable ‘i’ [-Werror=unused-variable]
int i;
^
cc1plus: all warnings being treated as errors
Another thing that is troubling is when there is 2 Werror, before and after, it
will output only warning
g++ -c -Werror -Wmissing-prototypes -Werror test.cpp -o test.o
cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for
C/ObjC but not for C++
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Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78179
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We already disable it rather liberally on AIX:
// { dg-xfail-run-if "AIX long double" { powerpc-ibm-aix* } }
Maybe we should split the long double parts into a separate file and just xfail
that on affected targets, so the rest of the file runs everywhere.
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From: "matti.niemenmaa+gccbugs at iki dot fi" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87167] New: strlen of stack-allocated zero-length array misoptimized in GCC 8
Date: Fri, 31 Aug 2018 11:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87167
Bug ID: 87167
Summary: strlen of stack-allocated zero-length array
misoptimized in GCC 8
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: matti.niemenmaa+gccbugs at iki dot fi
Target Milestone: ---
Created attachment 44636
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44636&action=edit
Preprocessed source
Unpreprocessed source code for illustration, reduced from UADE 2.13 (Unix Amiga
Delitracker Emulator):
#include <stdio.h>
#include <string.h>
struct uade_msg {
int x;
char data[0];
} __attribute__((packed));
int main(void) {
char commandbuf[4096] = {0};
struct uade_msg *um = (struct uade_msg *)commandbuf;
strcpy(um->data, "foobar");
printf("%s has strlen %zu\n", um->data, strlen((const char *)um->data));
printf("%s has strlen %zu\n", um->data, strlen((const char *)um->data));
}
When compiled with -O2 -fno-strict-aliasing on GCC 8.2.0, the output of the
resulting program on my x86-64 machine is:
foobar has strlen 6
foobar has strlen 0
GCC 7.3.1 and 5.4.1 show a strlen of 6 on both output lines. (As does clang
6.0.1, for what it's worth.)
Looking at a snippet of the assembly, around the printf calls:
movl $6, %edx
leaq .LC0(%rip), %rdi
movl $1651470182, 4(%rsp)
call printf@PLT
xorl %edx, %edx
xorl %eax, %eax
movq %rbx, %rsi
leaq .LC0(%rip), %rdi
call printf@PLT
It looks like GCC 8.2.0 has optimized away both strlen calls, but replaced each
with a different value. Based on a cursory inspection, GCC 7.3.1 and 5.4.1
optimize away the first strlen call and inline the second (and clang 6.0.1
doesn't do anything to the first but re-uses the result instead of doing
another call).
Replacing the `char data[0]` with `char data[]` seems to cause GCC 8.2.0 to
behave the same way as 7.3.1 and 5.4.1, resulting in an output of 6 on both
lines. Using calloc instead of the stack allocation does the same.
It's been a while since I had to worry about the aliasing rules in C so I'm not
entirely sure whether this is code is invalid or not, but regardless, I would
expect to always see a result of 6 here with -fno-strict-aliasing.
Full output from gcc uade.c -O2 -fno-strict-aliasing -Wall -Wextra -v
-save-temps:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--enable-cet=auto
Thread model: posix
gcc version 8.2.0 (GCC)
COLLECT_GCC_OPTIONS='-O2' '-fno-strict-aliasing' '-Wall' '-Wextra' '-v'
'-save-temps' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/cc1 -E -quiet -v uade.c -mtune=generic
-march=x86-64 -Wall -Wextra -fno-strict-aliasing -O2 -fpch-preprocess -o uade.i
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include
/usr/local/include
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-O2' '-fno-strict-aliasing' '-Wall' '-Wextra' '-v'
'-save-temps' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/cc1 -fpreprocessed uade.i -quiet
-dumpbase uade.c -mtune=generic -march=x86-64 -auxbase uade -O2 -Wall -Wextra
-version -fno-strict-aliasing -o uade.s
GNU C17 (GCC) version 8.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C17 (GCC) version 8.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 374c644ab4db4fa02e30fa5669d43e86
COLLECT_GCC_OPTIONS='-O2' '-fno-strict-aliasing' '-Wall' '-Wextra' '-v'
'-save-temps' '-mtune=generic' '-march=x86-64'
as -v --64 -o uade.o uade.s
GNU assembler version 2.31.1 (x86_64-pc-linux-gnu) using BFD version (GNU
Binutils) 2.31.1
COMPILER_PATH=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-O2' '-fno-strict-aliasing' '-Wall' '-Wextra' '-v'
'-save-temps' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/collect2 -plugin
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/lto-wrapper
-plugin-opt=-fresolution=uade.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id
--eh-frame-hdr --hash-style=gnu -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -pie
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib/Scrt1.o
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib/crti.o
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/crtbeginS.o
-L/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0
-L/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib -L/lib/../lib
-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../.. uade.o
-lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
--no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/crtendS.o
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib/crtn.o
COLLECT_GCC_OPTIONS='-O2' '-fno-strict-aliasing' '-Wall' '-Wextra' '-v'
'-save-temps' '-mtune=generic' '-march=x86-64'
>From gcc-bugs-return-614275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:01:41 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/87161] if -Werror appear after -Wmissing-prototypes the warning is not turn into error
Date: Fri, 31 Aug 2018 12:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87161
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Nir Aizik from comment #3)
> I think what make it counter-intuitive is that warning from valid option the
> order of Werror is not important
Warnings from the code can't be emitted until compilation starts, and all
options have to be processed before that starts. The -Werror has already been
seen before compilation starts, so warnings have been turned into errors by the
time compiler warnings are emitted.
> Another thing that is troubling is when there is 2 Werror, before and after,
> it will output only warning
>
> g++ -c -Werror -Wmissing-prototypes -Werror test.cpp -o test.o
> cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for
> C/ObjC but not for C++
That's weird, yes. I think when there are duplicates only the last one has an
effect, and so the first one (before the invalid -Wmissing-prototypes) is
ignored.
>From gcc-bugs-return-614276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:03:08 2018
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Subject: [Bug driver/87161] if -Werror appear after -Wmissing-prototypes the warning is not turn into error
Date: Fri, 31 Aug 2018 12:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87161
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This would all be solved if invalid warning options were never errors, as Richi
suggested.
Otherwise I think there would need to be a first pass of the options to look
for -Werror and then do a second pass, at which point -Werror would be active.
>From gcc-bugs-return-614277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:08:18 2018
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Subject: [Bug c++/80916] [6/7/8/9 Regression] Spurious "declared 'static' but never defined" warning
Date: Fri, 31 Aug 2018 12:08:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-11-27 00:00:00 |2018-8-31
CC| |aldyh at gcc dot gnu.org
Known to work| |5.5.0
Summary|Spurious "declared 'static' |[6/7/8/9 Regression]
|but never defined" warning |Spurious "declared 'static'
| |but never defined" warning
Known to fail|8.0 |6.4.0, 8.2.0, 9.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The warning started with r224161
Merge debug-early branch into mainline.
>From gcc-bugs-return-614278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:11:17 2018
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Subject: [Bug tree-optimization/87167] strlen of stack-allocated zero-length array misoptimized in GCC 8
Date: Fri, 31 Aug 2018 12:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Seems to be fixed on trunk and the branch head.
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Subject: [Bug tree-optimization/87167] strlen of stack-allocated zero-length array misoptimized in GCC 8
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87167
--- Comment #2 from Matti Niemenmaa <matti.niemenmaa+gccbugs at iki dot fi> ---
Thanks for the info. I peeked at the git log and came across PR86914 — this
looks like a duplicate of that. Sorry for not managing to find it in Bugzilla
earlier.
>From gcc-bugs-return-614280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:31:34 2018
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87168] New: ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
Date: Fri, 31 Aug 2018 12:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87168
Bug ID: 87168
Summary: ICE on valid code at -Os and above on
x86_64-linux-gnu: verify_ssa failed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It is a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180830 (experimental) [trunk revision 263982] (GCC)
$
$ gcctk -O1 small.c
$ gcc-8.1.0 -Os small.c
$
$ gcctk -Os small.c
small.c: In function ‘main’:
small.c:3:5: error: definition in block 8 does not dominate use in block 7
3 | int main ()
| ^~~~
for SSA_NAME: j_27 in statement:
i_20 = (unsigned int) j_27;
during GIMPLE pass: cunrolli
small.c:3:5: internal compiler error: verify_ssa failed
0xefaca3 verify_ssa(bool, bool)
../../gcc-source-trunk/gcc/tree-ssa.c:1188
0xbb2653 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1950
0xbb2f79 execute_todo
../../gcc-source-trunk/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
-----------------------------------
int a, b, c, d, e, f, *g;
int main ()
{
unsigned i;
while (b)
{
int j, m;
L1:
f = j;
L2:
if (i && e)
{
i = f;
goto L2;
}
j = f;
if (a)
goto L3;
for (m = 0; m < 2; m++)
if (d)
goto L1;
goto L2;
L3:
(&j != g) | c;
}
return 0;
}
>From gcc-bugs-return-614281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:38:38 2018
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Fri Aug 31 12:38:00 2018
New Revision: 264016
URL: https://gcc.gnu.org/viewcvs?rev=264016&root=gcc&view=rev
Log:
[PR c++/87155] Anonymous namespace and
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg02031.html
PR c++/87155
PR c++/84707
cp/
* name-lookup.c (name_lookup::search_namespace): Don't look at
inlines when searching for NULL names.
testsuite/
* g++.dg/cpp0x/pr87155.C: New.
* g++.dg/cpp0x/inline-ns10.C: Adjust.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr87155.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/inline-ns10.C
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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--- Comment #9 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Fri Aug 31 12:38:00 2018
New Revision: 264016
URL: https://gcc.gnu.org/viewcvs?rev=264016&root=gcc&view=rev
Log:
[PR c++/87155] Anonymous namespace and
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg02031.html
PR c++/87155
PR c++/84707
cp/
* name-lookup.c (name_lookup::search_namespace): Don't look at
inlines when searching for NULL names.
testsuite/
* g++.dg/cpp0x/pr87155.C: New.
* g++.dg/cpp0x/inline-ns10.C: Adjust.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr87155.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/inline-ns10.C
>From gcc-bugs-return-614283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:41:42 2018
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Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
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--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed trunk r264016.
>From gcc-bugs-return-614284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:43:42 2018
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Subject: [Bug c++/86898] [9 regression] g++.old-deja/g++.mike/p784.C FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
The failures vanished again after r263444.
>From gcc-bugs-return-614285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:46:55 2018
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Subject: [Bug target/86744] gcc.target/i386/addr-sel-1.c XPASSes on 32-bit x86
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-31
CC| |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
This issue still exists as of r264006.
>From gcc-bugs-return-614286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 12:50:47 2018
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Subject: [Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
Date: Fri, 31 Aug 2018 12:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-31
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|ICE on valid code at -Os |[9 Regression] ICE on valid
|and above on |code at -Os and above on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|verify_ssa failed |verify_ssa failed
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, likely mine.
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Just remove XPASS.
Ideally, this test should also work for 64bit targets (PR 87055).
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #2)
> Just remove XPASS.
Eh, XFAIL from the test.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87155] [8/9 Regression] unnamed namespace redeclaration error when inline namespace is present
Date: Fri, 31 Aug 2018 12:58:00 -0000
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--- Comment #8 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Fri Aug 31 12:57:45 2018
New Revision: 264017
URL: https://gcc.gnu.org/viewcvs?rev=264017&root=gcc&view=rev
Log:
[PR c++/87155] Anonymous namespace and
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg02031.html
PR c++/87155
PR c++/84707
cp/
* name-lookup.c (name_lookup::search_namespace): Don't look at
inlines when searching for NULL names.
testsuite/
* g++.dg/cpp0x/pr87155.C: New.
* g++.dg/cpp0x/inline-ns10.C: Adjust.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/pr87155.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/name-lookup.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/inline-ns10.C
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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--- Comment #10 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Fri Aug 31 12:57:45 2018
New Revision: 264017
URL: https://gcc.gnu.org/viewcvs?rev=264017&root=gcc&view=rev
Log:
[PR c++/87155] Anonymous namespace and
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg02031.html
PR c++/87155
PR c++/84707
cp/
* name-lookup.c (name_lookup::search_namespace): Don't look at
inlines when searching for NULL names.
testsuite/
* g++.dg/cpp0x/pr87155.C: New.
* g++.dg/cpp0x/inline-ns10.C: Adjust.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/pr87155.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/name-lookup.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/inline-ns10.C
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed gcc-8 r264017.
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed trunk & gcc8
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
Date: Fri, 31 Aug 2018 13:11:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It shows a few things, first, SSA names defined before the value-numbered
region are not considered "available". So for
_1 = ...;
region_begin:
_2 = _1;
_3 = _2;
we'd not optimize to
_2 = _1;
_3 = _1;
then it shows, that
5093 /* Look for sth available at the definition block of the
argument.
5094 This avoids inconsistencies between availability there which
5095 decides if the stmt can be removed and availability at the
5096 use site. The SSA property ensures that things available
5097 at the definition are also available at uses. */
computes bogus availability when the above isn't handled correctly (or we
make things available at places where there's dominating stuff available).
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87169] New: ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
Date: Fri, 31 Aug 2018 13:37:00 -0000
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Bug ID: 87169
Summary: ICE on valid code at -Os and above on
x86_64-linux-gnu: Segmentation fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It is a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180830 (experimental) [trunk revision 263982] (GCC)
$
$ gcctk -O1 small.c
$ gcc-8.1.0 -Os small.c
$
$ gcctk -Os small.c
during GIMPLE pass: fre
small.c: In function 'main':
small.c:38:1: internal compiler error: Segmentation fault
38 | }
| ^
0xc7544f crash_signal
../../gcc-source-trunk/gcc/toplev.c:325
0x985fb4 is_gimple_val(tree_node*)
../../gcc-source-trunk/gcc/gimple-expr.c:789
0xcbbb9f verify_gimple_assign_binary
../../gcc-source-trunk/gcc/tree-cfg.c:3785
0xcbcdd7 verify_gimple_assign
../../gcc-source-trunk/gcc/tree-cfg.c:4620
0xcbcdd7 verify_gimple_stmt
../../gcc-source-trunk/gcc/tree-cfg.c:4882
0xcca931 verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5360
0xb80f77 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1943
0xb818a9 execute_todo
../../gcc-source-trunk/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------------------
int a, b, c;
int main ()
{
int d;
b = 1;
L1:
for (; b > 1;)
goto L2;
{
int e[1];
L3:;
}
L2:
while (a)
{
d--;
goto L1;
}
while (c)
{
if (a)
goto L3;
if (a)
break;
if (a)
goto L2;
while (c)
while (c)
while (c)
while (c)
while (c)
while (c)
while (c)
;
}
return 0;
}
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Subject: [Bug tree-optimization/86850] ubsan: runtime error: member call on null pointer
Date: Fri, 31 Aug 2018 13:46:00 -0000
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--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
I tried out your suggestion and got this:
$ ~/gcc/results.264011.dcb.ubsan/bin/gcc -c -O3 -std=c89 -w bug453.c
during GIMPLE pass: slp
src/rate.c: In function ‘od_enc_rc_reset’:
src/rate.c:365:13: internal compiler error: in vect_build_slp_tree_2, at
tree-vect-slp.c:1492
0x676275 vect_build_slp_tree_2
../../trunk/gcc/tree-vect-slp.c:1492
0x2c3a7d6 vect_build_slp_tree
../../trunk/gcc/tree-vect-slp.c:1105
0x2c3e793 vect_build_slp_tree_2
../../trunk/gcc/tree-vect-slp.c:1257
0x2c3a7d6 vect_build_slp_tree
../../trunk/gcc/tree-vect-slp.c:1105
I used revision 264011 as a baseline.
>From gcc-bugs-return-614296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 13:50:05 2018
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Subject: [Bug c++/43105] Document restrictions on mixing -fno-rtti and -frtti
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jeffrey Yasskin from comment #0)
> programs don't link when a -frtti class is derived from a -fno-rtti base
> class.
It's more complicated than that. The ABI defines when RTTI is emitted:
https://itanium-cxx-abi.github.io/cxx-abi/abi.html#vague-rtti
There's only a problem when compiling a key function with -fno-rtti, and other
translation units compiled with -frtti have no way to know how the key function
was compiled.
For example, given:
struct A {
A();
~A();
};
struct B {
B();
virtual ~B() { }
};
struct C {
C();
virtual ~C();
};
A and B can always be derived from unconditionally. If C::~C() is compiled with
-fno-rtti then classes that derive from C must also use -fno-rtti to compile
their key function (and if they don't have a key function, then all uses of C
that need a definition must be compiled with -fno-rtti).
I don't think this can be fixed. Documenting it is non-trivial.
I went to see what Clang does, and I can't even find -frtti / -fno-rtti in the
manual, so we're doing better than that!
>From gcc-bugs-return-614297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 13:55:17 2018
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Subject: [Bug c++/87108] Template partial specialization is ignored
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think there's an existing bug report about this. The problem is here:
template<size_t Factor, size_t Original>
struct scale<Factor, amount<Original>> {
The template parameter for amount needs to be type 'int' not 'size_t'.
amount<Original> should still work though, because Original should be converted
to int, and so match amount<1>.
>From gcc-bugs-return-614298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:05:58 2018
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Subject: [Bug c++/87108] Template partial specialization is ignored
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83426
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like PR 83426 and PR 60679 are both the same issue as this.
>From gcc-bugs-return-614299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:06:46 2018
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Subject: [Bug c++/87108] Template partial specialization is ignored
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| |a/show_bug.cgi?id=77435
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And maybe PR 77435
>From gcc-bugs-return-614300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:07:26 2018
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From: "ievgenii.meshcheriakov at here dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/87170] New: compiler complains about not referenced character literals if they are only used in string literals
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Bug ID: 87170
Summary: compiler complains about not referenced character
literals if they are only used in string literals
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: ievgenii.meshcheriakov at here dot com
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Created attachment 44637
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44637&action=edit
Example file demonstrating the bug
Gnat generates warnings about unused character literals when they are only used
in string literal like demonstrated in the attached simplified example.
The type Bit values are only used inside definition of Bits. The compiler
generates the following warnings:
% gnatchop bug.ada
splitting bug.ada into:
bug.ads
bug.adb
% gnatmake -gnatwa bug.adb
x86_64-linux-gnu-gcc-8 -c -gnatwa bug.adb
bug.adb:3:17: warning: literal "'0'" is not referenced
bug.adb:3:22: warning: literal "'1'" is not referenced
While values of Bit are not used directly they are still used in the definition
of Bits, so the warning should not be generated.
The warning is not generated when definitions are changed as follows:
type Bit is (Zero, One);
...
constant Bits : constant Bit_Array := (Zero, One);
>From gcc-bugs-return-614301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:18:23 2018
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
Date: Fri, 31 Aug 2018 14:18:00 -0000
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--- Comment #13 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to pipcet from comment #12)
> So I think the performance difference is really significant for Emacs; my
> plan is to test all three versions on other programs, make sure the code
> works for C bitfields, and then submit it for inclusion. Is that okay?
Just as a process comment, you're not too likely to get an answer to this
sort of question; instead just go ahead and send the patch and see what
the responses are.
Thanks for looking into this.
>From gcc-bugs-return-614302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:18:36 2018
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Subject: [Bug c++/77435] Dependent reference non-type template parameter not matched for partial specialization
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-31
Target Milestone|--- |7.2
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was fixed on trunk by r249320 for PR 81102 (and also fixed for 7.2).
It doesn't look like a dup, so we should add the testcase before closing this.
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Subject: [Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r263875.
>From gcc-bugs-return-614303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 14:25:40 2018
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Subject: [Bug libstdc++/87106] Group move and destruction of the source, where possible, for speed
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Created attachment 44638
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44638&action=edit
proof of concept patch (diff -w)
Trying to get an idea of how things could look like. I know
is_trivially_move_constructible is not officially the right test to be allowed
to use memmove, that's a detail that can easily be changed.
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Subject: [Bug tree-optimization/87169] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-31
CC| |rguenth at gcc dot gnu.org
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|ICE on valid code at -Os |[9 Regression] ICE on valid
|and above on |code at -Os and above on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|Segmentation fault |Segmentation fault
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Also started with r263875.
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Subject: [Bug tree-optimization/87167] strlen of stack-allocated zero-length array misoptimized in GCC 8
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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Keywords| |wrong-code
CC| |msebor at gcc dot gnu.org
Resolution|FIXED |DUPLICATE
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, I believe this is a duplicate of pr86914.
*** This bug has been marked as a duplicate of bug 86914 ***
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Subject: [Bug tree-optimization/86914] [8 Regression] -O2 generates wrong code with strlen() of pointers within one-element arrays of structures
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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CC| |matti.niemenmaa+gccbugs@iki
| |.fi
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 87167 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 15:27:20 2018
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/77691] [7/8/9 regression] experimental/memory_resource/resource_adaptor.cc FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
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--- Comment #22 from Rainer Orth <ro at gcc dot gnu.org> ---
While debugging what could be memory corruption as reported in PR
bootstrap/87134,
I found another related issue: when I preload libumem.so (an alternative
debugging allocator library), two new failures occur:
+FAIL: experimental/memory_resource/new_delete_resource.cc execution test
/vol/gcc/src/hg/trunk/local/libstdc++-v3/testsuite/experimental/memory_resource/new_delete_resource.cc:117:
void test03(): Assertion 'aligned<max_align_t>(p)' failed.
+FAIL: experimental/memory_resource/resource_adaptor.cc execution test
/vol/gcc/src/hg/trunk/local/libstdc++-v3/testsuite/experimental/memory_resource/resource_adaptor.cc:136:
void test05(): Assertion 'aligned<max_align_t>(p)' failed.
this time for the 64-bit test only. I find that malloc(1) returns 8-byte
aligned storage, while alignof(max_align_t) is 16.
Reading https://github.com/jemalloc/jemalloc/issues/1072 suggests that this
might
be in accordance with C11.
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From: "luz at mujerlibre dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87171] New: -march=native doesn't detect flags correctly on G4560
Date: Fri, 31 Aug 2018 15:27:00 -0000
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Bug ID: 87171
Summary: -march=native doesn't detect flags correctly on G4560
Product: gcc
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-march=native on G4560 disables certain flags that appear in /proc/cpuinfo and
are enabled with -march=goldmont. The goldmont builds run fine so it appears
that those flags should be enabled with -march=native.
-march=native:
-mxsave [disabled]
-mxsavec [disabled]
-mxsaveopt [disabled]
-mxsaves [disabled]
-march=goldmont:
-mxsave [enabled]
-mxsavec [enabled]
-mxsaveopt [enabled]
-mxsaves [enabled]
/proc/cpuinfo:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush
dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm
constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2
ssse3 sdbg cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
tsc_deadline_timer aes xsave rdrand lahf_lm abm 3dnowprefetch cpuid_fault
invpcid_single pti tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust
smep erms invpcid mpx rdseed smap clflushopt intel_pt xsaveopt xsavec xgetbv1
xsaves dtherm arat pln pts hwp hwp_notify hwp_act_window hwp_epp
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87172] New: [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Fri, 31 Aug 2018 15:37:00 -0000
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Bug ID: 87172
Summary: [9 Regression] Spurious "Derived type 'c_funptr' at
(1) has not been declared" error after r263782
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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Reporter: dominiq at lps dot ens.fr
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Up to revision r263781, gfortran compiles the following test (pr71764 comment
3)
module sqlite3_primitive
use iso_c_binding, only: c_funptr
end module sqlite3_primitive
module fsqlite_runtime
use sqlite3_primitive
use, intrinsic :: iso_c_binding, only : c_null_funptr, c_funptr
implicit none
contains
subroutine fsqlite_exec
type(c_funptr) to_cb
to_cb = c_null_funptr
end subroutine
end module
Starting at r263782, I get the error
pr71764_1.f90:7:6:
7 | use sqlite3_primitive
| 1
Error: Derived type 'c_funptr' at (1) has not been declared
Is this expected? If no, I’ll file a new PR. If yes, why (the error message is
quite confusing)?
I also get the same error with the first test in pr71764 comment 4, but not
with the other variants.
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Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-614312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 15:52:35 2018
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Subject: [Bug libstdc++/77691] [7/8/9 regression] experimental/memory_resource/resource_adaptor.cc FAILs
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--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reasonable people have different opinions on whether that's valid. But since
they're unlikely to change, I need to accept that with some implementations,
malloc(n) is aligned to min(n, alignof(max_align_t)).
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed. I'll update a creduce'd testcase shortly.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 16:50:52 2018
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Subject: [Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 16:50:13 2018
New Revision: 264021
URL: https://gcc.gnu.org/viewcvs?rev=264021&root=gcc&view=rev
Log:
2018-08-31 Richard Biener <rguenther@suse.de>
PR tree-optimization/87168
* tree-ssa-sccvn.c (SSA_VAL): Add visited output parameter.
(rpo_elim::eliminate_avail): When OP was not visited it must
be available.
* gcc.dg/torture/pr87168.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87168.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 17:03:54 2018
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Subject: [Bug tree-optimization/87169] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine as well then. Confirmed even with the last fix.
We're doing
Replaced redundant PHI node defining d_14 with d_20(D)
...
Removing dead stmt d_14 = PHI <d_22(6), d_20(D)(2)>
but the LHS d_14 is still used...
Block 19: BB6 found not executable
that's the block with said stmt - so we fail to eliminate it. That's because
the block is reachable via the irreducible region but we marked the block
as not need iterating.
Ah, this is caused by the loop depth limiting, adjusting --param
rpo-vn-max-loop-depth helps.
Will investigate early next week.
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
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--- Comment #4 from Darko Veberic <darko.veberic at ijs dot si> ---
after 3 days of running the delta managed to bring down the .ii file from 4.5MB
to 1.4MB but it then failed with error message
Died at ~/soft/delta/trunk/delta line 123, <> line 104113.
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Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Fri, 31 Aug 2018 17:14:00 -0000
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--- Comment #1 from janus at gcc dot gnu.org ---
Reduced test case:
module m1
use iso_c_binding, only: c_funptr
end module
module m2
use m1
use iso_c_binding
end module
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Subject: [Bug fortran/66575] Endless compilation on missing end interface
Date: Fri, 31 Aug 2018 17:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66575
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
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--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Second case in comment one loops forever.
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From: "darko.veberic at ijs dot si" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87136
--- Comment #5 from Darko Veberic <darko.veberic at ijs dot si> ---
fortunately enough, i could manually find a very short minimal example which
still contains the failure. to reproduce the internal compiler error one should
compile the example as
g++ -c minimal_example.cc
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Subject: [Bug c++/87122] [8/9 Regression] ICE in tsubst_decomp_names
Date: Fri, 31 Aug 2018 17:18:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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From: "darko.veberic at ijs dot si" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 17:18:00 -0000
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--- Comment #6 from Darko Veberic <darko.veberic at ijs dot si> ---
Created attachment 44639
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44639&action=edit
minimal example which contains the internal compiler error
minimal_example.cc:21:57: internal compiler error: in emit_move_insn, at
expr.c:3722
return BiComplex{Interpolate(1.f, 0.f, 2.f, a.fA, b.fA),
std::complex<float>()};
^
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 17:20:00 -0000
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--- Comment #7 from Darko Veberic <darko.veberic at ijs dot si> ---
i get the internal error with
g++ (Ubuntu 8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk revision
259383]
and
g++-7 (Ubuntu 7.3.0-16ubuntu3) 7.3.0
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Subject: [Bug middle-end/87173] New: -Walloc-size-larger-than= silently fails for operands/size values larger than __SIZE_MAX__
Date: Fri, 31 Aug 2018 17:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87173
Bug ID: 87173
Summary: -Walloc-size-larger-than= silently fails for
operands/size values larger than __SIZE_MAX__
Product: gcc
Version: 9.0
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Created attachment 44640
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44640&action=edit
testcase.c
Exposed by gcc.dg/Walloc-size-larger-than-{4,5,6,7}.c for msp430-elf, on
latest trunk.
- If the operand to the allocation function being checked is larger than
__SIZE_MAX__, no warning is emitted.
- If the value passed to -Walloc-size-larger-than= is larger than or equal to
__SIZE_MAX__, no warning is emitted.
e.g. for msp430-elf, where __SIZE_MAX__ is 65535. testcase.c attached.
> msp430-elf-gcc -O -ftrack-macro-expansion=0 -Walloc-size-larger-than=65534 testcase.c -S
> testcase.c: In function 'f':
> testcase.c:6:3: warning: argument 1 value '65535' exceeds maximum object size 65534 [-Walloc-size-larger-than=]
> 6 | T (__builtin_malloc (a));
> | ^
> testcase.c:6:3: note: in a call to built-in allocation function '__builtin_malloc'
The expected warning for 65536 (__SIZE_MAX__ + 1) exceeding maximum object size
is missing.
Again, with __SIZE_MAX__ as the parameter to -Walloc-size-larger-than=
> msp430-elf-gcc -O -ftrack-macro-expansion=0 -Walloc-size-larger-than=65535 testcase.c -S
No warnings output.
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Subject: [Bug middle-end/87173] -Walloc-size-larger-than= silently fails for operands/size values larger than __SIZE_MAX__
Date: Fri, 31 Aug 2018 18:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
malloc argument is size_t, not unsigned long and so malloc is called in that
case (assuming unsigned long is wider than size_t) with argument 0, not 65536,
so there is nothing to warn about.
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From: "blitzrakete at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87174] New: virt-specifier not recognized on function declared like a variable
Date: Fri, 31 Aug 2018 18:06:00 -0000
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Bug ID: 87174
Summary: virt-specifier not recognized on function declared
like a variable
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Gcc (no flags) doesn't compile the following code:
using F = void();
struct X {
virtual F f;
};
struct Y : X {
F f override;
};
Clang can compile this code just fine. The (trimmed) error message is:
<source>:8:5: error: expected ';' at end of member declaration
<source>:8:7: error: 'override' does not name a type
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Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 18:16:00 -0000
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Resolution|--- |DUPLICATE
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Why are you using a prerelease of gcc, when it has been released almost 4
months ago? This bug has been fixed 9 days after your snapshot has been taken.
*** This bug has been marked as a duplicate of bug 85496 ***
>From gcc-bugs-return-614329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 18:16:50 2018
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Subject: [Bug middle-end/85496] [6/7/8 Regression] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 18:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |darko.veberic at ijs dot si
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 87136 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 18:25:59 2018
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From: "jozef.l at mittosystems dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87173] -Walloc-size-larger-than= silently fails for operands/size values larger than __SIZE_MAX__
Date: Fri, 31 Aug 2018 18:25:00 -0000
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--- Comment #2 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Right, thanks.
I'll just submit a patch for gcc.dg/Walloc-size-larger-than-{4,5,6,7}.c to
require "size32plus" then.
>From gcc-bugs-return-614331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 18:31:37 2018
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From: "darko.veberic at ijs dot si" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87136] internal compiler error: in emit_move_insn, at expr.c:3722
Date: Fri, 31 Aug 2018 18:31:00 -0000
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--- Comment #9 from Darko Veberic <darko.veberic at ijs dot si> ---
(In reply to Jakub Jelinek from comment #8)
> Why are you using a prerelease of gcc, when it has been released almost 4
> months ago? This bug has been fixed 9 days after your snapshot has been
> taken.
because this is the version 8 you get from the current ubuntu repos. i just
tried to move from gcc7 to gcc8 and this is what's available.
has it been fixed also in 7?
>From gcc-bugs-return-614332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 18:34:13 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Fri, 31 Aug 2018 18:34:00 -0000
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--- Comment #2 from janus at gcc dot gnu.org ---
Draft patch:
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index ded27624283..ea0ce800743 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -14245,7 +14245,7 @@ resolve_fl_derived (gfc_symbol *sym)
&sym->declared_at))
return false;
- if (sym->components == NULL && !sym->attr.zero_comp)
+ if (sym->components == NULL && !sym->attr.zero_comp && !sym->attr.use_assoc)
{
gfc_error ("Derived type %qs at %L has not been declared",
sym->name, &sym->declared_at);
>From gcc-bugs-return-614333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 19:02:56 2018
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Subject: [Bug c++/87174] virt-specifier not recognized on function declared like a variable
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 19:07:56 2018
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Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Fri, 31 Aug 2018 19:07:00 -0000
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--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to janus from comment #2)
> Draft patch:
Regtests cleanly on x86_64-linux-gnu.
>From gcc-bugs-return-614335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 19:18:05 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87175] New: __attribute__)) is ignored by the parser
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Bug ID: 87175
Summary: __attribute__)) is ignored by the parser
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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This compiles ok:
class __attribute__)) foo { };
>From gcc-bugs-return-614336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 19:46:27 2018
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This feels very much like 87109.
>From gcc-bugs-return-614337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 20:27:03 2018
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Subject: [Bug c++/87175] __attribute__)) is ignored by the parser
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With the following patch it is rejected, but haven't tested it much.
--- gcc/cp/parser.c.jj 2018-08-31 09:32:31.695537354 +0200
+++ gcc/cp/parser.c 2018-08-31 22:03:44.698234873 +0200
@@ -25124,9 +25124,11 @@ cp_parser_gnu_attributes_opt (cp_parser*
cp_lexer_consume_token (parser->lexer);
/* Look for the two `(' tokens. */
matching_parens outer_parens;
- outer_parens.require_open (parser);
+ if (!outer_parens.require_open (parser))
+ ok = false;
matching_parens inner_parens;
- inner_parens.require_open (parser);
+ if (!inner_parens.require_open (parser))
+ ok = false;
/* Peek at the next token. */
token = cp_lexer_peek_token (parser->lexer);
>From gcc-bugs-return-614338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 21:06:23 2018
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Subject: [Bug c/87171] -march=native doesn't detect flags correctly on G4560
Date: Fri, 31 Aug 2018 21:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87171
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
"The goldmont builds run fine" doesn't mean anything, you need to use the
__builtin_ia32_{*xsave*,*xrstor*,x[sg]etbv} builtins, otherwise it makes no
difference.
And the driver doesn't parse /proc/cpuinfo, but uses cpuid instruction.
What does x86info --all print for you?
>From gcc-bugs-return-614339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 21:27:12 2018
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87176] New: wrong code at -Os and above on x86-64-linux-gnu
Date: Fri, 31 Aug 2018 21:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87176
Bug ID: 87176
Summary: wrong code at -Os and above on x86-64-linux-gnu
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It is a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180831 (experimental) [trunk revision 264021] (GCC)
$
$ gcctk -O1 small.c; ./a.out
$ gcc-8.1.0 -Os small.c; ./a.out
$
$ gcctk -Os small.c
$ timeout -s 9 5 ./a.out
Killed
$
------------------------------------------
int a, b, c;
int main ()
{
int d = a = 0;
while (1)
{
a = a ^ 6;
if (!a)
break;
if (d)
goto L;
d = a;
for (b = 0; b < 2; b++)
{
const int *f[3] = { &c };
const int **g[] = { &f[2] };
int h = ~d;
if (d)
L:
if (h > 1)
continue;
}
}
return 0;
}
>From gcc-bugs-return-614340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 22:13:49 2018
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Subject: [Bug tree-optimization/87177] New: wrong code at -O2 and -O3 on x86-64-linux-gnu
Date: Fri, 31 Aug 2018 22:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87177
Bug ID: 87177
Summary: wrong code at -O2 and -O3 on x86-64-linux-gnu
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It is a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180831 (experimental) [trunk revision 264021] (GCC)
$
$ gcctk -Os small.c; ./a.out
$ gcc-8.1.0 -O2 small.c; ./a.out
$
$ gcctk -O2 small.c
$ timeout -s 9 5 ./a.out
Killed
$
-----------------------------------------
int printf (const char *, ...);
int a, b, c, e, f, g, h, i, j, k, l;
unsigned d;
static void p ()
{
while (1)
{
int n = h;
h = 8;
if (!e)
break;
h = n;
while (1)
;
}
for (; c != 4; c++)
{
int o = g = 1;
for (; g; g--)
{
while (d < b)
e--;
a = g;
int q = o;
if (q)
L1:
j = f;
if (l)
{
printf ("%d", g);
goto L1;
}
o = l;
k = q;
}
}
}
void s ()
{
int m = 0;
L2:
if (i && g)
goto L2;
for (; m < 2; m++)
p ();
}
int main ()
{
s ();
return 0;
}
>From gcc-bugs-return-614341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 22:32:57 2018
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Subject: [Bug libstdc++/87106] Group move and destruction of the source, where possible, for speed
Date: Fri, 31 Aug 2018 22:32:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44638|0 |1
is obsolete| |
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Created attachment 44641
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44641&action=edit
proof of concept patch v2 (diff -w)
Updated to also handle push_back.
I moved _GLIBCXX_ASAN_ANNOTATE_REINIT after std::_Destroy because that's more
convenient and it makes sense to me, but I am not familiar with those
annotations...
>From gcc-bugs-return-614342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 22:42:42 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
Date: Fri, 31 Aug 2018 22:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78179
--- Comment #3 from dave.anglin at bell dot net ---
On 2018-08-31 7:55 AM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78179
>
> --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> We already disable it rather liberally on AIX:
>
> // { dg-xfail-run-if "AIX long double" { powerpc-ibm-aix* } }
>
> Maybe we should split the long double parts into a separate file and just xfail
> that on affected targets, so the rest of the file runs everywhere.
I have this patch in my linux build tree:
-// { dg-xfail-run-if "AIX long double" { powerpc-ibm-aix* } }
+// { dg-xfail-run-if "AIX long double, or long double is double" {
hppa*-*-linux* powerpc-ibm-aix* } }
>From gcc-bugs-return-614343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 23:11:15 2018
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 44642
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44642&action=edit
creduce output
Here's the result of many hours of creduction with this interestingness test:
#!/bin/bash
~/src/llvm/latest/bin/clang++ -std=c++17 petri.cc -c -w || exit 1
LANG=C g++ -std=c++17 petri.cc -c -w 2>out && exit 1
awk "/ error: invalid application of 'sizeof' to incomplete type
'boost::serialization::U'/ { found=1 ; --errors } / error: / { ++errors } END {
exit found ? errors : 99 }" out
It compiles OK with clang but with g++ -std=c++17 -w the error is:
petri-net.cc: In instantiation of 'struct a::e<boost::serialization::U>':
petri-net.cc:44:50: required from 'class a::k<a::g<boost::serialization::U,
0, int> >'
petri-net.cc:49:47: required from 'class a::g<boost::serialization::U, 0,
int>'
petri-net.cc:103:7: required from 'static void boost::serialization::bh<au,
d>::bi(au) [with au = boost::cl; d = a::aa<a::g<int>, a::g<a::g<int>, 0, int>
>]'
petri-net.cc:109:3: required from 'void boost::serialization::bk(au, d, int)
[with au = boost::cl; d = a::aa<a::g<int>, a::g<a::g<int>, 0, int> >]'
petri-net.cc:148:5: [ skipping 32 instantiation contexts, use
-ftemplate-backtrace-limit=0 to disable ]
petri-net.cc:177:8: required from 'static void boost::cj<au>::ck::bi(au, d)
[with d = a::g<int>; au = boost::cl]'
petri-net.cc:182:11: required from 'static void boost::cj<au>::bi(au, d)
[with d = a::g<int>; au = boost::cl]'
petri-net.cc:188:9: required from 'void boost::bj(au, d) [with au =
boost::cl; d = a::g<int>]'
petri-net.cc:201:7: required from 'void boost::co::cn(d) [with d =
a::g<int>]'
petri-net.cc:208:5: required from 'void
boost::cp::cn(boost::serialization::bd<d>) [with d = a::g<int>]'
petri-net.cc:195:46: required from 'boost::cl& boost::interface_iarchive<
<template-parameter-1-1> >::operator>>(d) [with d =
boost::serialization::bd<a::g<int> >; <template-parameter-1-1> = int]'
petri-net.cc:225:40: required from here
petri-net.cc:37:15: error: invalid application of 'sizeof' to incomplete type
'boost::serialization::U'
37 | typename b< sizeof(d) >::type NonInteger;
| ^~~~~~~~~
Bizarrely, it compiles OK if __attribute__((__used__)) is removed on line 167.
>From gcc-bugs-return-614344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 23:12:44 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84075
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> Here's the result of many hours of creduction
(and some manual reduction)
>From gcc-bugs-return-614345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 31 23:25:36 2018
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From: "jpmarath at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87178] New: Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Fri, 31 Aug 2018 23:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87178
Bug ID: 87178
Summary: Compilation failure when program contains multiple
variables allocated in particular section, and at
least one variable is C++17 "inline"
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jpmarath at gmail dot com
Target Milestone: ---
This program fails to compile:
//--
inline __attribute__((section("foo"))) int xxx;
__attribute__((section("foo"))) int yyy;
int *p1 = &xxx;
int *p2 = &yyy;
//--
$g++ -std=c++17 -c m1.cpp
<source>:2:37: error: 'yyy' causes a section type conflict with 'xxx'
2 | __attribute__((section("foo"))) int yyy;
| ^~~
<source>:1:44: note: 'xxx' was declared here
1 | inline __attribute__((section("foo"))) int xxx;
| ^~~
The same program compile fine with clang (checked with clang 6.0)
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From: "tiagomacarios at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87179] New: duplicate extern "C" functions in different namespaces not flagged as an error
Date: Sat, 01 Sep 2018 00:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87179
Bug ID: 87179
Summary: duplicate extern "C" functions in different namespaces
not flagged as an error
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Code below compiles in GCC, but is discarded by clang.
namespace A {
extern "C" int g() { return 1; }
}
namespace B {
extern "C" int g() { return 1; } // ill-formed, the function g with C
language linkage has two definitions
}
clang error:
<source>:6:18: error: redefinition of 'g'
extern "C" int g() { return 1; } // ill-formed, the function g with C
language linkage has two definitions
^
<source>:2:18: note: previous definition is here
extern "C" int g() { return 1; }
^
1 error generated.
Compiler returned: 1
example is a copy and paste from the standard http://eel.is/c++draft/dcl.link#6
>From gcc-bugs-return-614347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 00:22:52 2018
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Subject: [Bug c++/87179] duplicate extern "C" functions in different namespaces not flagged as an error
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 25940.
*** This bug has been marked as a duplicate of bug 25940 ***
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Subject: [Bug c++/25940] multiple definitions of extern "C" functions
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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CC| |tiagomacarios at gmail dot com
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87179 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 04:16:19 2018
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From: "mattias.ellert at physics dot uu.se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87180] New: Pointer to member function comparison fails on hppa-linux-gnu
Date: Sat, 01 Sep 2018 04:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87180
Bug ID: 87180
Summary: Pointer to member function comparison fails on
hppa-linux-gnu
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mattias.ellert at physics dot uu.se
Target Milestone: ---
Host: hppa-linux-gnu
Target: hppa-linux-gnu
Build: hppa-linux-gnu
Created attachment 44643
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44643&action=edit
Test case illustrating the problem.
The attached tarball contains a reduced test case for a compilation failure
that occurs in a package I maintain for Debian Linux. The package compiles
without problem on all Debian architectures except hppa.
The issue only happens when linking using a shared library. If the test case is
linked statically the issue does not appear.
On all architectures except hppa the output of the test case is the following:
$ make
g++ -O2 -g -c -o main.o main.cpp
g++ -O2 -g -fPIC -c -o S.o S.cpp
g++ -shared -o libS.so S.o
g++ -o main main.o -L. -lS
g++ -o altmain main.o S.o
-- Running using shared library
LD_LIBRARY_PATH=. ./main
OK
-- Running using static build
./altmain
OK
On hppa the output is as follows:
$ make
g++ -O2 -g -c -o main.o main.cpp
g++ -O2 -g -fPIC -c -o S.o S.cpp
g++ -shared -o libS.so S.o
g++ -o main main.o -L. -lS
g++ -o altmain main.o S.o
-- Running using shared library
LD_LIBRARY_PATH=. ./main
not OK
-- Running using static build
./altmain
OK
Details about host and compiler:
$ uname -a
Linux panama 4.17.0-2-parisc64-smp #1 SMP Debian 4.17.14-1 (2018-08-13)
parisc64 GNU/Linux
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/hppa-linux-gnu/8/lto-wrapper
Target: hppa-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=hppa-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libssp
--disable-libitm --disable-libsanitizer --disable-libquadmath
--disable-libquadmath-support --enable-plugin --with-system-zlib
--disable-libphobos --enable-objc-gc=auto --enable-multiarch --disable-werror
--disable-libstdcxx-pch --enable-checking=release --build=hppa-linux-gnu
--host=hppa-linux-gnu --target=hppa-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-4)
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/86215] Exceptions are broken on OSX when linking with -static-libgcc
Date: Sat, 01 Sep 2018 08:06:00 -0000
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simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #1 from simon at pushface dot org ---
Related to PR80556.
Building this with GCC 8.1.0 on Darwin 17.7.0 results in
lockheed:86215 simon$ g++ demo.cc -static-libgcc -static-libstdc++
ld: warning: direct access in function 'operator new(unsigned long,
std::nothrow_t
const&) [clone .cold.0]' from file
'/opt/gcc-8.1.0/bin/../lib/gcc/x86_64-apple-darwin15/8.1.0/../../../libstdc++.a(new_opnt.o)'
to global weak symbol 'operator new(unsigned long, std::nothrow_t const&)'
from file
'/opt/gcc-8.1.0/bin/../lib/gcc/x86_64-apple-darwin15/8.1.0/../../../libstdc++.a(new_opnt.o)'
means the weak symbol cannot be overridden at runtime.
This was likely caused by different translation units being compiled with
different visibility settings.
and running it works OK.
lockheed:86215 simon$ ./a.out
abc123
This GCC 8.1.0 was
Configured with: ../gcc-8.1.0/configure
--prefix=/Volumes/Miscellaneous/tmp/opt/gcc-8.1.0
--without-libiconv-prefix
--disable-libmudflap
--disable-libstdcxx-pch
--disable-libsanitizer
--disable-libcc1
--disable-libcilkrts
--disable-multilib
--disable-nls
--enable-languages=c,c++,ada,fortran,objc,obj-c++
--host=x86_64-apple-darwin15
--target=x86_64-apple-darwin15
--build=x86_64-apple-darwin15
--with-boot-ldflags='-static-libstdc++ -static-libgcc
-Wl,-headerpad_max_install_names'
The reason for explicitly setting the boot-ldflags was because of the need to
also specify the headerpad-max option.
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Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Sat, 01 Sep 2018 08:18:00 -0000
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--- Comment #15 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sat Sep 1 08:11:34 2018
New Revision: 264027
URL: https://gcc.gnu.org/viewcvs?rev=264027&root=gcc&view=rev
Log:
2018-09-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* trans-array.c (gfc_conv_scalarized_array_ref): Do not fix
info->descriptor but pass it directly to gfc_build_array_ref.
(gfc_conv_array_ref): Likewise for se->expr.
* trans.c (gfc_build_array_ref): If 'decl' is a COMPONENT_REF
obtain the span field directly from it.
2018-09-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* gfortran.dg/pr86328.f90 : New test.
* gfortran.dg/pr86760.f90 : New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86328.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86760.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/trans-array.c
branches/gcc-8-branch/gcc/fortran/trans.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 08:19:31 2018
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Subject: [Bug fortran/86760] [8/9 Regression] FORTRAN: polymorphic arrays inside a user-defined type generate segmentation faults
Date: Sat, 01 Sep 2018 08:19:00 -0000
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sat Sep 1 08:11:34 2018
New Revision: 264027
URL: https://gcc.gnu.org/viewcvs?rev=264027&root=gcc&view=rev
Log:
2018-09-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* trans-array.c (gfc_conv_scalarized_array_ref): Do not fix
info->descriptor but pass it directly to gfc_build_array_ref.
(gfc_conv_array_ref): Likewise for se->expr.
* trans.c (gfc_build_array_ref): If 'decl' is a COMPONENT_REF
obtain the span field directly from it.
2018-09-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/86328
PR fortran/86760
* gfortran.dg/pr86328.f90 : New test.
* gfortran.dg/pr86760.f90 : New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86328.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86760.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/trans-array.c
branches/gcc-8-branch/gcc/fortran/trans.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 08:33:12 2018
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Subject: [Bug fortran/86760] [8/9 Regression] FORTRAN: polymorphic arrays inside a user-defined type generate segmentation faults
Date: Sat, 01 Sep 2018 08:33:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk and 8-branch. Thanks for the report.
Paul
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Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Sat, 01 Sep 2018 08:34:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk and 8-branch. Thanks for the report.
Paul
>From gcc-bugs-return-614355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 09:25:16 2018
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Subject: [Bug fortran/85954] [8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:266
Date: Sat, 01 Sep 2018 09:25:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
I had better take it.
Bizarrely, this works correctly:
program p
character(:), allocatable :: z(:)
interface
subroutine s(x)
character(:), allocatable :: x(:)
end
subroutine t(x)
character(:), allocatable :: x(:)
end
end interface
allocate (z, source = ['lmnop'])
call s(z)
call t(z)
end
subroutine s(x)
character(:), allocatable :: x(:)
associate (y => x)
y = ['abc']
end associate
print *, allocated(x), size(x), len(x), x
end
subroutine t(x)
character(:), allocatable :: x(:)
x = ['abc']
print *, allocated(x), size(x), len(x), x
end
Cheers
Paul
>From gcc-bugs-return-614356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 12:05:38 2018
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Subject: [Bug c++/49531] Doesn't resolve to conversion function template specialization in expressions
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at redhat dot com,
| |nathan at acm dot org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing c++ FE maintainers
>From gcc-bugs-return-614357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:02:18 2018
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From: "mscfd at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements
Date: Sat, 01 Sep 2018 13:02:00 -0000
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--- Comment #17 from martin <mscfd at gmx dot net> ---
Thanks for fixing it! Using class(*) with gfortran is still a bit of a
precarious ride.
>From gcc-bugs-return-614358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:08:06 2018
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ensadc at mailnesia dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ensadc at mailnesia dot com
--- Comment #4 from ensadc at mailnesia dot com ---
Further reduced:
template < int > struct b { };
template < typename n > struct g {
typedef b< sizeof(n) > l;
};
template < typename h, typename = typename g< h >::l > class aa {};
template < typename h, typename bz >
void bj(aa< h, bz >, int);
template < template < class > class ct > void bj(ct< class U >);
void f() {
bj(aa<int>(), 0);
}
----
(`__attribute__((__used__))` in the original example matters because it ensures
that the call is instantiated.)
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Subject: [Bug c/87171] -march=native doesn't detect flags correctly on G4560
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--- Comment #2 from Angelica <luz at mujerlibre dot net> ---
x86info v1.30. Dave Jones 2001-2011
Feedback to <davej@redhat.com>.
MP Table:
# APIC ID Version State Family Model Step Flags
# 0 0x15 BSP, usable 6 14 9 0x0381
# 2 0x15 AP, usable 6 14 9 0x0381
Found 4 identical CPUs
Extended Family: 0 Extended Model: 9 Family: 6 Model: 158 Stepping: 9
Type: 0 (Original OEM)
CPU Model (x86info's best guess): Unknown model.
Processor name string (BIOS programmed): Intel(R) Pentium(R) CPU G4560 @
3.50GHz
Performance MSRs:
/dev/cpu/0/msr: No such file or directory
eax in: 0x00000000, eax = 00000016 ebx = 756e6547 ecx = 6c65746e edx = 49656e69
eax in: 0x00000001, eax = 000906e9 ebx = 00100800 ecx = 4ffaebbf edx = bfebfbff
eax in: 0x00000002, eax = 76036301 ebx = 00f0b5ff ecx = 00000000 edx = 00c30000
eax in: 0x00000003, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000004, eax = 1c004121 ebx = 01c0003f ecx = 0000003f edx = 00000000
eax in: 0x00000005, eax = 00000040 ebx = 00000040 ecx = 00000003 edx = 00142120
eax in: 0x00000006, eax = 000027f5 ebx = 00000002 ecx = 00000001 edx = 00000000
eax in: 0x00000007, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000008, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000009, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x0000000a, eax = 07300404 ebx = 00000000 ecx = 00000000 edx = 00000603
eax in: 0x0000000b, eax = 00000001 ebx = 00000002 ecx = 00000100 edx = 00000000
eax in: 0x0000000c, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x0000000d, eax = 0000001b ebx = 00000440 ecx = 00000440 edx = 00000000
eax in: 0x0000000e, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x0000000f, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000010, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000011, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000012, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000013, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x00000014, eax = 00000001 ebx = 0000000f ecx = 00000007 edx = 00000000
eax in: 0x00000015, eax = 00000002 ebx = 00000124 ecx = 00000000 edx = 00000000
eax in: 0x00000016, eax = 00000dac ebx = 00000dac ecx = 00000064 edx = 00000000
eax in: 0x80000000, eax = 80000008 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x80000001, eax = 00000000 ebx = 00000000 ecx = 00000121 edx = 2c100800
eax in: 0x80000002, eax = 65746e49 ebx = 2952286c ecx = 6e655020 edx = 6d756974
eax in: 0x80000003, eax = 20295228 ebx = 20555043 ecx = 36353447 edx = 20402030
eax in: 0x80000004, eax = 30352e33 ebx = 007a4847 ecx = 00000000 edx = 00000000
eax in: 0x80000005, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000
eax in: 0x80000006, eax = 00000000 ebx = 00000000 ecx = 01006040 edx = 00000000
eax in: 0x80000007, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000100
eax in: 0x80000008, eax = 00003027 ebx = 00000000 ecx = 00000000 edx = 00000000
Cache info
TLB info
Data TLB: 4KB pages, 4-way associative, 64 entries
Data TLB: 4KB pages, 4-way associative, 64 entries
64 byte prefetching.
Found unknown cache descriptors: 63 76 b5 c3 ff
Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh
ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 pclmuldq dtes64 monitor ds-cpl vmx
est tm2 ssse3 [1:ecx:11] cx16 xTPR pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
tsc-deadline aes xsave osxsave [1:ecx:30]
Extended feature flags:
SYSCALL xd pdpe1gb rdtscp em64t lahf_lm [80000001:ecx:5] [80000001:ecx:8] dts
arat pln ecmd ptm [6:eax:7] [6:eax:8] [6:eax:9] [6:eax:10] [6:eax:13]
nonstop_tsc
Long NOPs supported: yes
Address sizes : 39 bits physical, 48 bits virtual
3.50GHz processor (estimate).
Total processor threads: 4
This system has 1 dual-core processor with hyper-threading (2 threads per core)
running at an estimated 3.50GHz
>From gcc-bugs-return-614360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:38:03 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87171] -march=native doesn't detect flags correctly on G4560
Date: Sat, 01 Sep 2018 13:38:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, your CPU doesn't support AVX, which is why xsave* is turned off:
#define XCR_AVX_ENABLED_MASK \
(XSTATE_SSE | XSTATE_YMM)
if (has_osxsave)
asm (".byte 0x0f; .byte 0x01; .byte 0xd0"
: "=a" (eax), "=d" (edx)
: "c" (XCR_XFEATURE_ENABLED_MASK));
else
eax = 0;
/* Check if AVX registers are supported. */
if ((eax & XCR_AVX_ENABLED_MASK) != XCR_AVX_ENABLED_MASK)
{
has_avx = 0;
has_avx2 = 0;
has_fma = 0;
has_fma4 = 0;
has_f16c = 0;
has_xop = 0;
has_xsave = 0;
has_xsaveopt = 0;
has_xsaves = 0;
has_xsavec = 0;
}
Is XSAVE* useful for anything when AVX isn't enabled?
>From gcc-bugs-return-614361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:41:52 2018
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Subject: [Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-01
CC| |jakub at gcc dot gnu.org
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|wrong code at -O2 and -O3 |[9 Regression] wrong code
|on x86-64-linux-gnu |at -O2 and -O3 on
| |x86-64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263960.
>From gcc-bugs-return-614362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:44:59 2018
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Subject: [Bug tree-optimization/87176] [9 Regression] wrong code at -Os and above on x86-64-linux-gnu
Date: Sat, 01 Sep 2018 13:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-01
CC| |jakub at gcc dot gnu.org
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|wrong code at -Os and above |[9 Regression] wrong code
|on x86-64-linux-gnu |at -Os and above on
| |x86-64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263875.
>From gcc-bugs-return-614363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 13:56:32 2018
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From: "daniel at hebirobotics dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/69665] Internal error on #pragma push_macro("__FILE__")
Date: Sat, 01 Sep 2018 13:56:00 -0000
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Daniel Wright <daniel at hebirobotics dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel at hebirobotics dot com
--- Comment #3 from Daniel Wright <daniel at hebirobotics dot com> ---
I am having this same issue but with `_Pragma push_macro("__LINE__")`
Here is an example piece of code which fails on GCC (I've tested any version
from 5.2 up to the current trunk (9.0.0)):
https://gcc.godbolt.org/z/v_fM_V
While this is probably UB per any ISO C++ standard, all other major compilers
will compile the code, so I don't see why GCC shouldn't as well.
>From gcc-bugs-return-614364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 14:10:20 2018
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Subject: [Bug c++/87181] New: ICE with _Pragma push_macro
Date: Sat, 01 Sep 2018 14:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87181
Bug ID: 87181
Summary: ICE with _Pragma push_macro
Product: gcc
Version: unknown
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Similar to #69665, I am getting an ICE when trying to push the builtin
`__LINE__` macro. I've tested various versions of GCC from 5.2 up until GCC 9
(which I am assuming is still in beta?).
The output error is:
`internal compiler error: invalid hash type 1 in cpp_macro_definition`
All GCC compilers I have tested this on target x86_64 (x86_64-redhat-linux).
You can reproduce this with a single line of code such as:
#pragma push_macro("__LINE__")
or
_Pragma("push_macro(\"__LINE__\")
or even just the following in bash:
g++ -x c++ - -c -o /dev/null <<< "#pragma push_macro(\"__LINE__\")"
I have tried passing different flags to `g++` when attempting to compile, but
nothing has produced different results.
Here is a simple snippet of code on godbolt.org which shows that many other
commonly used compilers will compile with this used:
https://gcc.godbolt.org/z/bv2-rY
While I understand this is probably UB per any ISO C++, it was my assumption
that gcc would not be the only compiler to fail to build the source file.
>From gcc-bugs-return-614365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 14:13:11 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87171] -march=native doesn't detect flags correctly on G4560
Date: Sat, 01 Sep 2018 14:13:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-01
Ever confirmed|0 |1
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> So, your CPU doesn't support AVX, which is why xsave* is turned off:
>
> #define XCR_AVX_ENABLED_MASK \
> (XSTATE_SSE | XSTATE_YMM)
>
> if (has_osxsave)
> asm (".byte 0x0f; .byte 0x01; .byte 0xd0"
> : "=a" (eax), "=d" (edx)
> : "c" (XCR_XFEATURE_ENABLED_MASK));
> else
> eax = 0;
>
> /* Check if AVX registers are supported. */
> if ((eax & XCR_AVX_ENABLED_MASK) != XCR_AVX_ENABLED_MASK)
> {
> has_avx = 0;
> has_avx2 = 0;
> has_fma = 0;
> has_fma4 = 0;
> has_f16c = 0;
> has_xop = 0;
> has_xsave = 0;
> has_xsaveopt = 0;
> has_xsaves = 0;
> has_xsavec = 0;
> }
>
> Is XSAVE* useful for anything when AVX isn't enabled?
XSAVE* are needed for other states. It is wrong to disable XSAVE*
when AVX isn't supported.
>From gcc-bugs-return-614366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 14:47:07 2018
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Subject: [Bug other/77609] __attribute__((section(".note.foo"))) forces SHT_PROGBITS though the assembler would use SHT_NOTE
Date: Sat, 01 Sep 2018 14:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77609
Gabriel Rauter <rauter.gabriel at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rauter.gabriel at gmail dot com
--- Comment #6 from Gabriel Rauter <rauter.gabriel at gmail dot com> ---
This change breaks the .noinit section on avr which now gets set to PROGBTIS
because the section type is omitted. It should be NOBITS.
>From gcc-bugs-return-614367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 16:05:51 2018
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From: "vigerske at math dot hu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/87182] New: libbacktrace does not use GCC own zlib
Date: Sat, 01 Sep 2018 16:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87182
Bug ID: 87182
Summary: libbacktrace does not use GCC own zlib
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
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CC: ibuclaw at gdcproject dot org
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The configure of libbacktrace checks for -lz without considering the build of
zlib in ../../libz (the one that GCC builds). That is, libbacktrace introduces
a dependency on the systems zlib in libgfortran even if --with-system-zlib has
not been set.
It seems that this was introduced with rev 253275:
https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/configure.ac?r1=253095&r2=253275
Rev 263320 does some cosmetic change
(https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/configure.ac?r1=256169&r2=263320),
but doesn't fix this issue (imho).
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Subject: [Bug tree-optimization/87074] [8/9 Regression] Unroll and jam bug: O3 result differ from O2
Date: Sat, 01 Sep 2018 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87074
--- Comment #5 from Michael Matz <matz at gcc dot gnu.org> ---
Author: matz
Date: Sat Sep 1 17:22:05 2018
New Revision: 264029
URL: https://gcc.gnu.org/viewcvs?rev=264029&root=gcc&view=rev
Log:
Fix PR87074
PR tree-optimization/87074
* gimple-loop-jam.c (unroll_jam_possible_p): Check loop exit
PHIs for outer-loop uses.
testsuite/
* gcc.dg/pr87074.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87074.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-loop-jam.c
trunk/gcc/testsuite/ChangeLog
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/49836] [C++0x] vector<T>::push_back() should not require T to be (move-)assignable
Date: Sat, 01 Sep 2018 17:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49836
--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
Hi,
I understand not using assignment when it isn't necessary. But we ended up with
a stricter testcase using CopyConsOnlyType, where the type has a deleted move
constructor which, as far as I understand the standard, makes it an invalid
type for use in vector::push_back. Is that something we want to keep
supporting, or may I break it?
>From gcc-bugs-return-614370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 17:34:21 2018
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Subject: [Bug tree-optimization/87074] [8/9 Regression] Unroll and jam bug: O3 result differ from O2
Date: Sat, 01 Sep 2018 17:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87074
--- Comment #6 from Michael Matz <matz at gcc dot gnu.org> ---
Author: matz
Date: Sat Sep 1 17:33:45 2018
New Revision: 264030
URL: https://gcc.gnu.org/viewcvs?rev=264030&root=gcc&view=rev
Log:
Fix PR87074
Backport from mainline
PR tree-optimization/87074
* gimple-loop-jam.c (unroll_jam_possible_p): Check loop exit
PHIs for outer-loop uses.
testsuite/
* gcc.dg/pr87074.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87074.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/gimple-loop-jam.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87074] [8/9 Regression] Unroll and jam bug: O3 result differ from O2
Date: Sat, 01 Sep 2018 17:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87074
Michael Matz <matz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |matz at gcc dot gnu.org
--- Comment #7 from Michael Matz <matz at gcc dot gnu.org> ---
Fixed in trunk and gcc-8-branch
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From: "noah.pendleton at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87183] New: -Wformat: format-extra-args fails to catch ex: printf(PRIu32, 1)
Date: Sat, 01 Sep 2018 19:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87183
Bug ID: 87183
Summary: -Wformat: format-extra-args fails to catch ex:
printf(PRIu32, 1)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: noah.pendleton at gmail dot com
Target Milestone: ---
Created attachment 44644
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44644&action=edit
preprocessed file
>>Description:
Using <inttypes.h> format specifiers but omitting the `%` prefix causes the
`-Werror=format-extra-args` error to not be omitted:
```c
#include <inttypes.h>
printf(PRIu32, 2); // doesn't warn
printf(PRIu32 "", 2); // doesn't warn
printf("u", 2); // warns
printf("" PRIu32, 2); // warns
```
Interestingly, defining PRIu32 in the test file and not using <inttypes.h>
yields the expected behavior, eg:
```c
#define PRIu32 "u"
printf(PRIu32, 2); // warns
printf(PRIu32 "", 2); // warns
printf("u", 2); // warns
printf("" PRIu32, 2); // warns
```
>>Info:
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../configure --enable-languages=c,c++,fortran
--disable-multilib --disable-bootstrap --build=x86_64-linux-gnu
Thread model: posix
gcc version 9.0.0 20180831 (experimental) (GCC)
>>Complete Command Line:
gcc -Wall -Werror test.c
>>Complete Compiler Output:
test.c: In function 'main':
test.c:7:12: error: too many arguments for format [-Werror=format-extra-args]
7 | printf("u", 2); // fails
| ^~~
test.c:8:12: error: too many arguments for format [-Werror=format-extra-args]
8 | printf("" PRIu32, 2); // fails
| ^~
cc1: all warnings being treated as errors
>>Preprocessed file attached.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87183] -Wformat: format-extra-args fails to catch ex: printf(PRIu32, 1)
Date: Sat, 01 Sep 2018 19:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87183
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Maybe a dup of bug 68052, see comment #6
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Subject: [Bug c/87183] -Wformat: format-extra-args fails to catch ex: printf(PRIu32, 1)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87183
--- Comment #1 from Noah Pendleton <noah.pendleton at gmail dot com> ---
Typo, the description should read-
"Using <inttypes.h> format specifiers but omitting the `%` prefix causes
the `-Werror=format-extra-args` error to not be **emitted**:" 😬
>From gcc-bugs-return-614375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 19:35:33 2018
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Subject: [Bug c/87183] -Wformat: format-extra-args fails to catch ex: printf(PRIu32, 1)
Date: Sat, 01 Sep 2018 19:35:00 -0000
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--- Comment #3 from Noah Pendleton <noah.pendleton at gmail dot com> ---
Yep, looks like it, enabling `-Wsystem-headers` yields the expected result:
```bash
gcc -Wall -Werror -Wsystem-headers test.c
In file included from test.c:1:
test.c: In function 'main':
test.c:5:12: error: too many arguments for format [-Werror=format-extra-args]
5 | printf(PRIu32, 2); // doesn't warn
| ^~~~~~
test.c:6:12: error: too many arguments for format [-Werror=format-extra-args]
6 | printf(PRIu32 "", 2); // doesn't warn
| ^~~~~~
test.c:7:12: error: too many arguments for format [-Werror=format-extra-args]
7 | printf("u", 2); // warns
| ^~~
test.c:8:12: error: too many arguments for format [-Werror=format-extra-args]
8 | printf("" PRIu32, 2); // warns
| ^~
cc1: all warnings being treated as errors
```
>From gcc-bugs-return-614376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 19:41:02 2018
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Just don't do it. C++17 inline variables are comdat, so you can't force them
into the same section as other variables that don't behave the same way.
>From gcc-bugs-return-614377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 21:08:07 2018
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Subject: [Bug tree-optimization/87184] New: generic-match.c:55076:1: ICE: Segmentation fault
Date: Sat, 01 Sep 2018 21:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87184
Bug ID: 87184
Summary: generic-match.c:55076:1: ICE: Segmentation fault
Product: gcc
Version: 9.0
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Severity: normal
Priority: P3
Component: tree-optimization
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Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa64-hp-hpux11.11
/test/gnu/gcc/objdir/./prev-gcc/xg++ -B/test/gnu/gcc/objdir/./prev-gcc/
-B/opt/g
nu64/gcc/gcc-9/hppa64-hp-hpux11.11/bin/ -nostdinc++
-B/test/gnu/gcc/objdir/prev-
hppa64-hp-hpux11.11/libstdc++-v3/src/.libs
-B/test/gnu/gcc/objdir/prev-hppa64-hp
-hpux11.11/libstdc++-v3/libsupc++/.libs
-I/test/gnu/gcc/objdir/prev-hppa64-hp-h
pux11.11/libstdc++-v3/include/hppa64-hp-hpux11.11
-I/test/gnu/gcc/objdir/prev-h
ppa64-hp-hpux11.11/libstdc++-v3/include
-I/test/gnu/gcc/gcc/libstdc++-v3/libsup
c++ -L/test/gnu/gcc/objdir/prev-hppa64-hp-hpux11.11/libstdc++-v3/src/.libs
-L/te
st/gnu/gcc/objdir/prev-hppa64-hp-hpux11.11/libstdc++-v3/libsupc++/.libs
-fno-PIE
-c -g -O2 -fno-checking -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous
-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wmissing-for
mat-attribute -Woverloaded-virtual -pedantic -Wno-long-long
-Wno-variadic-macros
-Wno-overlength-strings -Werror -fno-common -Wno-unused -DHAVE_CONFIG_H -I.
-I.
-I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include -I./../intl
-I../.
./gcc/gcc/../libcpp/include -I/opt/gnu64/gcc/gmp/include
-I../../gcc/gcc/../lib
decnumber -I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc/gcc/
../libbacktrace -o generic-match.o -MT generic-match.o -MMD -MP -MF
./.deps/ge
neric-match.TPo generic-match.c
during GIMPLE pass: einline
generic-match.c: In function 'tree_node* generic_simplify_MULT_EXPR(location_t,
tree_code, tree, tree, tree)':
generic-match.c:55076:1: internal compiler error: Segmentation fault
55076 | }
| ^
libbacktrace could not find executable to open
-bash-4.4$ prev-gcc/xgcc -Bprev-gcc/ -v
Reading specs from prev-gcc/specs
COLLECT_GCC=prev-gcc/xgcc
COLLECT_LTO_WRAPPER=prev-gcc/lto-wrapper
Target: hppa64-hp-hpux11.11
Configured with: ../gcc/configure --with-gnu-as --with-as=/opt/gnu64/bin/as
--with-ld=/usr/ccs/bin/ld --enable-shared --with-local-prefix=/opt/gnu64
--prefix=/opt/gnu64/gcc/gcc-9 --enable-threads=posix
--with-gmp=/opt/gnu64/gcc/gmp --enable-checking=yes
--enable-languages=c,c++,objc,obj-c++,fortran
Thread model: posix
gcc version 9.0.0 20180829 (experimental) [trunk revision 263968] (GCC)
Revision 263646 was okay.
>From gcc-bugs-return-614378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 21:46:28 2018
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Subject: [Bug tree-optimization/87184] generic-match.c:55076:1: ICE: Segmentation fault
Date: Sat, 01 Sep 2018 21:46:00 -0000
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 44645
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44645&action=edit
Preprocessed source
We might be running out of memory.
>From gcc-bugs-return-614379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 01 22:08:17 2018
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Subject: [Bug target/67246] MIPS: lw (load word) is generated for byte bitfield, leading to unaligned access
Date: Sat, 01 Sep 2018 22:08:00 -0000
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Jeff Hansen <sqrammi at hotmail dot com> changed:
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--- Comment #8 from Jeff Hansen <sqrammi at hotmail dot com> ---
Why would this be a bug in the kernel?
Why is gcc trying to load a word or short when it's a 4-bit bitfield?? So
you're recommending that we add __attribute__((packed)) to the struct? Is there
any other way/option to change this behavior?
>From gcc-bugs-return-614380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 01:41:30 2018
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From: "10walls at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86856] Format warnings building all-gcc
Date: Sun, 02 Sep 2018 01:41:00 -0000
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--- Comment #13 from jon_y <10walls at gmail dot com> ---
Looks good from my end, thanks for the fixes.
>From gcc-bugs-return-614381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 01:44:06 2018
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From: "P at draigBrady dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87185] New: ICE in prune_lambda_captures()
Date: Sun, 02 Sep 2018 01:44:00 -0000
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Bug ID: 87185
Summary: ICE in prune_lambda_captures()
Product: gcc
Version: 8.0
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Priority: P3
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bug 84726 introduced a regression in GCC 8.0 causing a compiler crash with:
void f() { const int i=0; [&]() noexcept {i;}; }
This crashes in prune_lambda_captures as we assume const_vars.get(var) in
lambda.c returns non NULL.
The reason it's NULL is that var_to_maybe_prune() is not a subset of
mark_const_cap_r(). Specifically is_constant_capture_proxy() returns false
in mark_const_cap_r(), but in var_to_maybe_prune() we return candidates
where is_normal_capture_proxy() is false.
Also "noexcept" is significant here since it stops traversal
down the statement list subtree, thus not populating const_vars.
>From gcc-bugs-return-614382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 01:57:53 2018
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Subject: [Bug c++/87185] ICE in prune_lambda_captures()
Date: Sun, 02 Sep 2018 01:57:00 -0000
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--- Comment #1 from Pádraig Brady <P at draigBrady dot com> ---
Created attachment 44646
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44646&action=edit
ICE avoidance patch and test case
>From gcc-bugs-return-614383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 03:32:09 2018
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Subject: [Bug target/67246] MIPS: lw (load word) is generated for byte bitfield, leading to unaligned access
Date: Sun, 02 Sep 2018 03:32:00 -0000
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--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jeff Hansen from comment #8)
> Why would this be a bug in the kernel?
>
> Why is gcc trying to load a word or short when it's a 4-bit bitfield?? So
> you're recommending that we add __attribute__((packed)) to the struct? Is
> there any other way/option to change this behavior?
Because it is sometimes more efficent to use a wider access than a narrorer one
for bitfields.
There is no other option since the original struct is 4 byte aligned.
>From gcc-bugs-return-614384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 06:26:35 2018
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Subject: [Bug tree-optimization/87186] New: Does not inline constant to sim
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Bug ID: 87186
Summary: Does not inline constant to sim
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>From gcc-bugs-return-614385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 06:29:15 2018
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
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--- Comment #1 from MCCCS <mcccs at gmx dot com> ---
It can simplify
~(~(x|s)|x)|~(~(x|s)|s)
to
s^x
but it can't simplify
const int t = x|s;
~(~t|x)|~(~t|s)
or
const int t = ~(x|s);
~(t|x)|~(t|s)
or
const int t = ~x&~s;
~(t|x)|~(t|s)
>From gcc-bugs-return-614386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 11:09:51 2018
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Subject: [Bug target/36381] preprocessing, fortran: register include paths and framework
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|dfranke at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> (In reply to Daniel Franke from comment #0)
> > Follow up to PR36348:
> >
> > "[darwin-f.c] need[s] to implement darwin_register_frameworks, as well as
> > the -iframework option implemented by handle_c_option in darwin-c.c. I
> > suggest splitting that part of darwin-c.c into a new file darwin-cpp.c that
> > is included in all three of c_target_objs, cxx_target_objs,
> > fortran_target_objs.
> >
> > Furthermore, given that the target hook TARGET_HANDLE_C_OPTION is
> > implemented only by darwin-c.c, it makes sense to rename it to
> > TARGET_HANDLE_CPP_OPTION and call it from the Fortran front-end too."
> >
> > Reference: http://gcc.gnu.org/ml/fortran/2008-05/msg00348.html
>
> Are you still working on this? If so, the status can be ASSIGNED, otherwise,
> it'd make sense to remove yourself as the assignee.
No reply, so I'll take that as implying you're no longer working on this.
>From gcc-bugs-return-614387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 11:38:39 2018
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Subject: [Bug c/17426] Emit mandatory warning for manual expansions of offsetof
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Assignee|giovannibajo at gmail dot com |unassigned at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> (In reply to Giovanni Bajo from comment #3)
> > (In reply to comment #2)
> >
> > > it's only where an integer constant expression is
> > > required, as in bug 17396 (static array dimension) or for case labels,
> > > enum values, bit-field widths, null pointer constants, designators for
> > > array initializers, that there's a problem.
> >
> > Thanks for the list. I will try to activate the warning in these contexts,
> > but
> > I do not know the C frontend, so maybe I'll need to do this incrementally.
> >
> > > fits the long-established
> > > GCC extension of symbolic difference constant expressions if being used in
> > > a static initializer
> >
> > This could be a pedwarn, then, right?
>
> Are you still working on this?
No reply; taking that as a no.
>From gcc-bugs-return-614388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 11:42:36 2018
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Subject: [Bug tree-optimization/33915] iv folding fails with pointer iterations
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
CC| |rakdver at kam dot mff.cuni.cz
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--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #10)
> (In reply to Eric Gallager from comment #9)
> > (In reply to Zdenek Dvorak from comment #3)
> > > It does not reproduce for me on i686-linux, either. Do you pass any special
> > > flags to configure?
> >
> > If it didn't reproduce for you does it make sense for you still to be the
> > assignee for this?
>
> WAITING on a reply
No reply; since nobody could actually reproduce this to confirm it, I'm going
to close this bug.
>From gcc-bugs-return-614389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 11:51:39 2018
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Subject: [Bug other/44803] LIBRARY_PATH should work on cross-compilers
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Last reconfirmed|2018-06-02 00:00:00 |
Resolution|--- |WONTFIX
Assignee|felipe.contreras at gmail dot com |unassigned at gcc dot gnu.org
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Eric Gallager from comment #4)
> > (In reply to Felipe Contreras from comment #3)
> > > Is this not clear?
> > >
> > > It would be useful to cross-compile like this:
> > >
> > > export C_INCLUDE_PATH=/opt/arm/ffmpeg/include
> > > export LIBRARY_PATH=/opt/arm/ffmpeg/lib
> > >
> > > But LIBRARY_PATH is ignored.
> >
> > this bug showed up in my Assignee_but_not_ASSIGNED saved search. Are you
> > still working on this?
>
> WAITING on a reply
No reply; closing
>From gcc-bugs-return-614390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 12:09:35 2018
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Subject: [Bug target/67246] MIPS: lw (load word) is generated for byte bitfield, leading to unaligned access
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--- Comment #10 from Jeff Hansen <sqrammi at hotmail dot com> ---
So you're recommending that we add __attribute__((packed)) to the struct?
>From gcc-bugs-return-614391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 12:59:31 2018
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Subject: [Bug lto/87187] New: FAIL: gfortran.dg/short_circuiting_3.f90 -g -flto (internal compiler error) on darwin
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87187
Bug ID: 87187
Summary: FAIL: gfortran.dg/short_circuiting_3.f90 -g -flto
(internal compiler error) on darwin
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: marxin at gcc dot gnu.org
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Build: x86_64-apple-darwin17
The new test gfortran.dg/short_circuiting_3.f90 fails with -g -flto -O2 on 8.2
and trunk (9.0):
lto1: internal compiler error: in gen_subprogram_die, at dwarf2out.c:22682
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Subject: [Bug lto/87187] FAIL: gfortran.dg/short_circuiting_3.f90 -g -flto (internal compiler error) on darwin
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
libgomp.fortran/taskloop3.f90 is failing the same way:
FAIL: libgomp.fortran/taskloop3.f90 -g -flto (internal compiler error)
lto1: internal compiler error: in gen_subprogram_die, at dwarf2out.c:22731
dwarf2out.c:22682 is when the tests are compiled with 8.2, dwarf2out.c:22731
are when the tests are compiled with 9.0.
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
Date: Sun, 02 Sep 2018 13:49:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
How did you check? Looking at the .optimized dump or the asm, it is optimized
to a simple xor.
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Subject: [Bug c++/87185] ICE in prune_lambda_captures()
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Thanks Padraig, I'll give your patch a try
>From gcc-bugs-return-614395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 16:45:02 2018
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Subject: [Bug middle-end/87188] New: Function pointer canonicalization optimized away
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Bug ID: 87188
Summary: Function pointer canonicalization optimized away
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Created attachment 44647
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44647&action=edit
c++ testcase
This is debian bug #907586 reported by Mattias Ellert:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=907586
Compilation is as follows:
g++ -O2 -g -c -o main.o main.cpp
g++ -O2 -g -fPIC -c -o S.o S.cpp
g++ -shared -fPIC -o libS.so S.o
g++ -o main main.o -L. -lS
g++ -o altmain main.o S.o
-- Running using shared library
LD_LIBRARY_PATH=. ./main
not OK
-- Running using static build
./altmain
OK
If S.cpp is compiled at -O0, the test passes.
The problem in the optimized code is here:
.align 4
.LC0:
.word P%_ZNK2SVneERKS_
.text
.align 4
.globl _ZNK2SR4findEv
.type _ZNK2SR4findEv, @function
.LFB1721:
.cfi_startproc
_ZNK2SR4findEv:
.PROC
.CALLINFO FRAME=0,NO_CALLS
.ENTRY
ldw 0(%r26),%r21
comb,=,n %r26,%r21,.L14
ldw 12(%r21),%r20
ldw 8(%r21),%r28
addil LT'.LC0,%r19
ldw RT'.LC0(%r1),%r31
ldw 0(%r31),%r22
comclr,<> %r22,%r28,%r28
ldi 1,%r28
The comclr instruction compares the function pointer at .LC0 with the one
indirectly passed via this.
The code needs to call __canonicalize_funcptr_for_compare().
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Sun, 02 Sep 2018 17:07:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I don't have a recently built gcc lying around, but from an earlier version,
here's the command line from the testsuite log:
/home/wschmidt/gcc/build/gccgit-test/gcc/xgcc
-B/home/wschmidt/gcc/build/gccgit-test/gcc/
/home/wschmidt/gccgit/gcc/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c
-m64 -fno-diagnostics-show-caret -fdiagnostics-color=never -O2
-ftree-vectorize -fvect-cost-model=dynamic -fno-common -maltivec
-fdump-tree-vect-details -S -o costmodel-vect-33.s
One valid configuration triple would be powerpc64le-linux-gnu, using either
--with-cpu=power8 or --with-cpu=power9.
I can post the vectorization dump information after I have time to build a new
compiler.
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Subject: [Bug libgcc/87189] New: libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
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Bug ID: 87189
Summary: libgcc/gthr-posix.h (__gthread_active_p) makes
unwarranted assumptions about libpthread.a
Product: gcc
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Redirected here from GLIBC bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=21777
A trivial program using pthread_key_create but not pthread_mutex_lock will
crash on GLIBC, when linked statically.
Current code in libgcc/gthr-posix.h:
#ifdef __GLIBC__
__gthrw2(__gthrw_(__pthread_key_create),
__pthread_key_create,
pthread_key_create)
# define GTHR_ACTIVE_PROXY __gthrw_(__pthread_key_create)
assumes that if __pthread_key_create is linked in, then
pthread_mutex_{lock,unlock} will also be (__gthread_active_p() returns 1).
As attached test demonstrates, that is not necessarily the case.
Workaround: add -Wl,-u,pthread_mutex_lock -Wl,-u,pthread_mutex_unlock to the
link line.
Confirmed with current GLIBC trunk (a6e8926f8d49a213a9abb1a61f6af964f612ab7f)
and GCC @264043.
P.S. Why would a program use pthread_key_create but not pthread_mutex_lock?
Suppose you have a piece of data you want to memoize between calls to a certain
function, and that the data needs to be modifiable. It's convenient to make
that data thread-local, so the function is both thread-safe and parallelizable.
--- test.c ---
/* Link with "gcc -pthread test.c -static" */
#include <pthread.h>
pthread_key_t k;
int
main (int argc, char *argv[])
{
pthread_key_create (&k, NULL);
pthread_setspecific (k, NULL);
return 0;
}
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Sun, 02 Sep 2018 18:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87189
--- Comment #1 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Crash stack for reference:
Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x0000000000477f7c in __gthread_mutex_lock (__mutex=0x6a7380
<object_mutex>) at ./gthr-default.h:748
#2 __register_frame_info_bases (begin=<optimized out>, ob=0x6a2300 <object>,
tbase=<optimized out>, dbase=<optimized out>) at
../../../libgcc/unwind-dw2-fde.c:103
#3 0x0000000000400acd in frame_dummy ()
#4 0x0000000000000001 in ?? ()
#5 0x000000000040194c in __libc_csu_init (argc=-9472, argc@entry=1,
argv=argv@entry=0x7fffffffdc78, envp=0x7fffffffdc88) at elf-init.c:88
#6 0x0000000000401170 in __libc_start_main (main=0x400add <main>, argc=1,
argv=0x7fffffffdc78, init=0x4018d0 <__libc_csu_init>, fini=0x401970
<__libc_csu_fini>, rtld_fini=0x0, stack_end=0x7fffffffdc68) at
../csu/libc-start.c:264
#7 0x00000000004009fa in _start () at ../sysdeps/x86_64/start.S:120
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Sun, 02 Sep 2018 18:04:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|middle-end |tree-optimization
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Things are wrong at expand.
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Sun, 02 Sep 2018 18:11:00 -0000
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 44648
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44648&action=edit
Preprocessed source
>From gcc-bugs-return-614401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 18:37:24 2018
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From: "noloader at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug web/87190] New: Feedback on documentation for symbol visibility
Date: Sun, 02 Sep 2018 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87190
Bug ID: 87190
Summary: Feedback on documentation for symbol visibility
Product: gcc
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This is general feedback on symbol visibility documentation. I feel like the
docs are lacking some important information and it makes a resulting shared
object appear to not meet expectations.
The docs I am referring to:
* https://gcc.gnu.org/wiki/Visibility
* https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html
At the highest level, the docs say to use -fvisibility=hidden (and perhaps
-fvisibility-inlines-hidden) to hide all symbols. Then the user is expected to
use DLL_PUBLIC (from the Visibility wiki) to unhide symbols and create a public
API.
This works as expected when a shared object does not depend on other libraries.
Something like:
$ cat bar.c
extern "C" DLL_PUBLIC
int DoBar(int n)
{
...
return 0;
}
$ gcc -fvisibility=hidden -shared bar.c -o libbar.so
The result is something like the following, which is expected. It is consistent
with the documents.
$ nm -gCD libbar.so | grep ' T '
$ 00000000000184e8 T _fini
$ 00000000000069d0 T _init
$ 00000000000095b0 T DoBar
Now, here's where the problem crops in. Suppose Bar depends on Foo and Foo was
not built with visibility. This is very common, even among some distro provided
libraries. Remember the docs say _all_ symbols are private (not _some_
symbols).
$ gcc -fvisibility=hidden -shared bar.c ./libfoo.a -o libbar.so
The results will be similar to the following. Notice the count grows from 3 to
the number of symbols available in libfoo.a.
$ nm -gCD libbar.so | grep ' T ' | wc -l
816
In the second example GCC drove compile and link but not all symbols were
private. To make them private we have to add linker options:
$ gcc -fvisibility=hidden -shared bar.c ./libfoo.a -o libbar.so
-Wl,--exclude-libs,All
This is the point of contention for me because the docs say all symbols are
private unless DLL_PUBLIC is used (from the Visibility wiki) to unhide symbols.
I think the docs could be more clear on both the GCC options page and the
Visibility wiki. I think two ro three things should be stated for completeness.
First, instead of saying all symbols are private when using the options, maybe
the docs should say "symbols in the translation unit being compiled are
private, and not all symbols in the program or library".
Second, the docs might clearly state -fvisibility=hidden (and friends) only
applies to the compiler. The compiler does not pass down
"-fvisibility=hidden"-like options to the linker.
Third, the docs should say something like "additional linker switches may be
required to hide all symbols in a shared object. For the GNU linker LD, LDFLAGS
should include -Wl,--exclude-libs,All. Other linkers may require additional
options."
The second suggestion may seem obvious but it is not. We are told to use the
compiler to drive link, and the compiler doing so with -fsanitize=undefined or
-fsanitize=address works as expected. That is we don't need to manually add
libraries by hand.
I was looking for some past/similar issues but I did not find a good one. Maybe
no one is using the feature or no one noticed. I did find this one, which seems
to be a symptom of the confusion:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20218.
It is fascinating reading Andrew Pinski and H.J. Lu discussing the behavior and
externalities like the ELF specs (I did not even consider the effects of the
ELF specification). But at the end of the day the GCC docs say all the symbols
are private but it is possible to arrive at a program or shared library where
some symbols are private.
If someone is willing to make the leap that GCC should take the
-fvisibility=hidden compiler option and turn it into a linker option like
-Wl,--exclude-libs,All (when driving link), then this could be a GCC issue. I'd
personally like to see it happen, but I am not willing to go that far and make
the leap.
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Subject: [Bug web/87190] Feedback on documentation for symbol visibility
Date: Sun, 02 Sep 2018 18:47:00 -0000
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--- Comment #1 from Jeffrey Walton <noloader at gmail dot com> ---
In case it is needed, here's the citation for "Remember the docs say all
symbols are private (not some symbols)":
https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html:
Set the default ELF image symbol visibility to the specified option—all symbols
are marked with this unless overridden within the code. Using this feature can
very substantially improve linking and load times of shared object libraries,
produce more optimized code, provide near-perfect API export and prevent symbol
clashes. It is strongly recommended that you use this in any shared objects you
distribute...
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Sun, 02 Sep 2018 19:06:00 -0000
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Created attachment 44649
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44649&action=edit
vect details dump for r264043
Here's the requested dump information.
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Subject: [Bug c++/53972] array constant expression not valid as template argument
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at redhat dot com,
| |nathan at acm dot org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing c++ FE maintainers
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-02
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Sun, 02 Sep 2018 20:07:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe it is rejects-invalid instead.
comdat works at the section granularity, so can't really work if you force
inline vars with other vars into the same section.
>From gcc-bugs-return-614407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 20:09:39 2018
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Subject: [Bug web/87190] Feedback on documentation for symbol visibility
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
In the future please consider making reports more concise and to the point.
> $ gcc -fvisibility=hidden -shared bar.c ./libfoo.a -o libbar.so
Here a good solution is to ensure libfoo's symbols have hidden visibility in
the first place, not have the linker downgrade it.
I agree the documentation could be improved with examples to better showcase
good practices.
> If someone is willing to make the leap that GCC should take the -fvisibility=hidden compiler option and turn it into a linker option like -Wl,--exclude-libs,All
Please no. -fvisiblity= takes 4 different values, and having some of them
implicitly turn on a linker option, but only on gnu-compatible linkers, is
ridiculous. Orthogonal, easy-to-explain options are good.
>From gcc-bugs-return-614408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 20:28:00 2018
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Subject: [Bug web/87190] Feedback on documentation for symbol visibility
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Remember that -fvisibility is not a perfect substitute to proper annotations
via the visibility pragma and attributes. If you do
extern void foo(void);
void bar()
{
foo();
}
then with -fvisibility=hidden, the call to foo goes via the PLT, with the
corresponding speed and code size penalties on 32-bit x86 and other archs where
PLT calls need some setup on caller side.
>From gcc-bugs-return-614409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 21:33:56 2018
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Subject: [Bug c/87191] New: UBSan doesn't catch invalid pointer arithmetic outside known object bounds
Date: Sun, 02 Sep 2018 21:33:00 -0000
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Bug ID: 87191
Summary: UBSan doesn't catch invalid pointer arithmetic outside
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Test case:
void bar(void *);
int foo()
{
char a[10];
bar(&a+2);
}
The function bar is just there as a compiler barrier.
My expectation is that -fsanitize=undefined should produce an unconditional
trap, since the only value constants to add to &a are 0 or 1 (and only 0 if the
result is dereferenced). Instead, GCC versions prior to 8 generate no sanitizer
check at all, and GCC 8 and clang both generate what I would characterize as a
wrong check: they look to see if (uintptr_t)a+20 overflows past the end of the
address space, rather than past the end of the object size (which is clearly
available here via __builtin_object_size).
My understanding is that -fsanitize=object-size, included in
-fsanitize=undefined, is supposed to catch exactly this case.
>From gcc-bugs-return-614410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 21:49:05 2018
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Subject: [Bug target/68178] [arm] Relative address expressions bind at as-time, even if symbol is weak
Date: Sun, 02 Sep 2018 21:49:00 -0000
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--- Comment #10 from Rich Felker <bugdal at aerifal dot cx> ---
Was this ever fixed? I've been using -ffunction-sections -fdata-sections by
default for a long time now so it dropped off my radar.
>From gcc-bugs-return-614411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:10:01 2018
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Subject: [Bug c/87192] New: -Warray-bounds (even =2) does not work on struct members
Date: Sun, 02 Sep 2018 22:10:00 -0000
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Bug ID: 87192
Summary: -Warray-bounds (even =2) does not work on struct
members
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Minimal test case:
void bar(void *);
void foo()
{
struct {
int a[10];
} s;
bar(s.a+12);
}
Compiles without warning with -O2 -Warray-bounds=2. Tested on gcc 7.3.
>From gcc-bugs-return-614412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:15:00 2018
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Subject: [Bug c/87191] UBSan doesn't catch invalid pointer arithmetic outside known object bounds
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
It seems a bit strange to me to frame this in terms of ubsan. This is can be
reasonably diagnosed at compile time, so I'd prefer to frame this as missing
compile-time diagnostic first, and ubsan issue second (you'd need ubsan if the
offset was variable, but here it's a compile-time constant). It may be
appropriate to split the issue in two.
(note: we should diagnose regardless if 'a' is an array or not, in the example
it's an array to show how a mistake could be easy to make, in 'char a;
bar(&a+2);' the erroneous pointer of course looks unlikely to appear in real
practice)
At a minimum we should diagnose if offsetting a pointer to a toplevel object
not by 0/1 (ideally also if not by 0 and then dereferencing?), e.g.:
warning: creating out-of-bounds pointer based on complete object 'a'
If 'a' is not a toplevel object, but a field of a toplevel struct, invalid
pointer arithmetic still should be diagnosed when the resulting pointer is out
of bounds.
>From gcc-bugs-return-614413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:19:50 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is most likely due to the array being at the end of the struct.
>From gcc-bugs-return-614414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:20:12 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> This is most likely due to the array being at the end of the struct.
There is most likely another bug about this same thing.
>From gcc-bugs-return-614415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:26:22 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
Date: Sun, 02 Sep 2018 22:26:00 -0000
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--- Comment #3 from Rich Felker <bugdal at aerifal dot cx> ---
Adding a second member int b; does not make it work. I'm not sure why the end
of the struct should be special anyway; is it for the sake of supporting code
with erroneous alternatives to flexible array members? Shouldn't "=2" disable
that exception?
>From gcc-bugs-return-614416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:41:28 2018
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From: "gerald at pfeifer dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug web/87050] Bump wwwdocs to html5
Date: Sun, 02 Sep 2018 22:41:00 -0000
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--- Comment #10 from Gerald Pfeifer <gerald at pfeifer dot com> ---
Mostly done,
cf. https://gcc.gnu.org/ml/gcc/2018-09/msg00005.html
And for the actual conversion,
cf. https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00026.html
The sole page not labeled as HTML 5 now is our main page, which requires
a bit more work, but that doesn't appear pressing.
And I'll need to improve one or the other page a bit still in the coming
days.
(In reply to Janne Blomqvist from comment #0)
> So apart from the headers, little work ought to be needed for the
> conversion itself.
Well, no. :-} https://gcc.gnu.org/ml/gcc-patches/2018-09/ speaks a
different language, and that's just part of it, after all I did the
last year(s) already.
>From gcc-bugs-return-614417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:41:43 2018
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Sun, 02 Sep 2018 22:41:00 -0000
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
So, the test case compiled with r264043 produces 3 functions: main1.part.0,
main1, and main. The test case compiled with r263980 produces only 1 function
(main). The loop is vectorized in both main and main1, so the count in the
test case is off. But this change to sreal seems very unlikely to cause that.
Are we sure about the bisection to r263981?
I'll build with r263981 next to verify.
>From gcc-bugs-return-614418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:43:13 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Rich Felker from comment #3)
> Adding a second member int b; does not make it work.
Was that second member before or after the array?
> is it for the sake of supporting
> code with erroneous alternatives to flexible array members
Yes, due to C89 not having flexible array members, it is to support them in
older code. There are many pre C99 code floating around that needs to be
supported.
>From gcc-bugs-return-614419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:44:28 2018
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
Date: Sun, 02 Sep 2018 22:44:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Can you provide a full testcase that can compile?
>From gcc-bugs-return-614420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 22:53:32 2018
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
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--- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> ---
> But this change to sreal seems very unlikely to cause that.
> Are we sure about the bisection to r263981?
Sreals are used to estimate profile which in turn may affect decision
of function splitting & inliner. If something was really off we however
would likely see it in performance results which seems OK.
I will try to take look tomorrow as well.
Honza
>From gcc-bugs-return-614421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 23:33:15 2018
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Subject: [Bug middle-end/87157] [9 regression] gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c fails starting with r263981
Date: Sun, 02 Sep 2018 23:33:00 -0000
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--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK, that makes sense. And I verified that r263981 does indeed introduce the
extra functions. Thanks for looking into it!
>From gcc-bugs-return-614422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 02 23:39:29 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
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--- Comment #5 from Rich Felker <bugdal at aerifal dot cx> ---
By "second" I meant in membership order, i.e. after the array.
I understand the need for supporting some (albeit wrong, UB even in C89) legacy
code doing FAM hacks, but it should be possible to disable that for catching
errors in modern code. In any case it seems unrelated to this bug report since
it happens with or without the affected member being at the end.
>From gcc-bugs-return-614423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 00:03:39 2018
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From: "webrown.cpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87193] New: symbols in <version> have inconsistent types
Date: Mon, 03 Sep 2018 00:03:00 -0000
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Bug ID: 87193
Summary: symbols in <version> have inconsistent types
Product: gcc
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In the new <version> header, most symbols are given a value of type int, rather
than a value of type long as mandated by [support.limits.general] Table 35 of
N4762.
For example, we find these consecutive macro def'ns:
#define __cpp_lib_is_final 201402L
#define __cpp_lib_make_reverse_iterator 201402
in which the values are to be identical, yet have distinct types.
Code such as:
#include <version>
static_assert( std::is_same_v<long, decltype(__cpp_lib_is_final)> );
static_assert( std::is_same_v<long, decltype(__cpp_lib_make_reverse_iterator)>
);
will detect the difference.
>From gcc-bugs-return-614424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 03:14:29 2018
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Subject: [Bug c/87191] UBSan doesn't catch invalid pointer arithmetic outside known object bounds
Date: Mon, 03 Sep 2018 03:14:00 -0000
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--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> ---
This PR is about UBSan. I agree it's usually preferable to detect this type of
error statically by warnings, and I also filed #87192 for -Warray-bounds not
being able to catch the specific type of case I was affected by.
However, UB of this form is a dynamic condition at runtime, and any static
tests will have either false negatives or false positives, e.g. when the code
is reachable only conditionally on the size of the array and the conditional is
not locally visible.
In my case I tried UBSan as a fallback since I was surprised that no warning
was being generated, and when I found the UBSan also failed to catch the
problem, I reported this bug.
>From gcc-bugs-return-614425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 05:20:40 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
Date: Mon, 03 Sep 2018 05:20:00 -0000
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
I think the warning is about *accessing* (read or write) out of bound, not just
creating a pointer. That sounds like a separate warning (clang calls it
-Warray-bounds-pointer-arithmetic).
>From gcc-bugs-return-614426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 05:31:01 2018
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 05:30:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC is correct, this is similar in the way you put a inline function in a
section.
Clang is wrong in accepting it.
>From gcc-bugs-return-614427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 05:42:40 2018
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
Date: Mon, 03 Sep 2018 05:42:00 -0000
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--- Comment #7 from Rich Felker <bugdal at aerifal dot cx> ---
Nope. If the array is not in a struct, the warning works, e.g.
void bar(void *);
void foo()
{
int a[10];
bar(a+12);
}
>From gcc-bugs-return-614428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 05:50:33 2018
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From: "kariya_mitsuru at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87194] New: Associative container cannot be inserted from move iterators that refer to elements implicitly convertible to value_type
Date: Mon, 03 Sep 2018 05:50:00 -0000
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Bug ID: 87194
Summary: Associative container cannot be inserted from move
iterators that refer to elements implicitly
convertible to value_type
Product: gcc
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The sample code below is failed to compile by GCC HEAD (Sep 1, 2018).
=========================== sample code ===========================
#include <array>
#include <iterator>
#include <set>
#include <string>
#include <utility>
struct S {
S(const char* s) : s(s) {}
operator std::string() && { return std::move(s); }
std::string s;
};
int main()
{
std::array<S, 3> a{ "abc", "def", "ghi" };
std::set<std::string> s;
s.insert(std::make_move_iterator(a.begin()),
std::make_move_iterator(a.end()));
}
=========================== sample code ===========================
cf. https://wandbox.org/permlink/c8rASYAgPKxRBUt0
The C++17 standard [associative.reqmts] says,
p.8: ..., i and j satisfy input iterator requirements and refer to elements
implicitly convertible to value_type, ...
a.insert(i,j) in Table 90: Requires: value_type shall be EmplaceConstructible
into X from *i.
So, I think that the sample code should be coumpiled successfully.
The unordered_set has the same problem.
cf. https://wandbox.org/permlink/Q4pVJkFVSS2Qijrg
But I don't know why, [unord.req] says that
p.8: ..., i and j denote input iterators that refer to value_type, ...
So, I am not sure that the unordered_set should be too.
>From gcc-bugs-return-614429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 06:21:19 2018
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
Date: Mon, 03 Sep 2018 06:21:00 -0000
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--- Comment #4 from MCCCS <mcccs at gmx dot com> ---
Flags: -O2 -fdump-tree-original
Code:
int f1 (int x, int s) {
return ~(~(x|s)|x)|~(~(x|s)|s);
}
int f2 (int x, int s) {
const int t = x|s;
return ~(~t|x)|~(~t|s);
}
int f3 (int x, int s) {
const int t = ~(x|s);
return ~(t|x)|~(t|s);
}
int f4 (int x, int s) {
const int t = ~x&~s;
return ~(t|x)|~(t|s);
}
Tree output (f1 has the expected output, others
should have had the same output):
;; Function f1 (null)
;; enabled by -tree-original
{
return s ^ x;
}
;; Function f2 (null)
;; enabled by -tree-original
{
const int t = x | s;
const int t = x | s;
return ~((int) ~t | x & s);
}
;; Function f3 (null)
;; enabled by -tree-original
{
const int t = ~(x | s);
const int t = ~(x | s);
return ~(x & s | (int) t);
}
;; Function f4 (null)
;; enabled by -tree-original
{
const int t = ~(x | s);
const int t = ~(x | s);
return ~(x & s | (int) t);
}
>From gcc-bugs-return-614430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 06:26:28 2018
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
Date: Mon, 03 Sep 2018 06:26:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Right, original is not the one to look at really. There are more passes later
on that will optimize it using the patterns that optimized the original one.
>From gcc-bugs-return-614431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 06:57:45 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87195] New: ICE in simplify_binary_operation_1, at simplify-rtx.c:3637
Date: Mon, 03 Sep 2018 06:57:00 -0000
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Bug ID: 87195
Summary: ICE in simplify_binary_operation_1, at
simplify-rtx.c:3637
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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CC: segher at gcc dot gnu.org
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Host: x86_64-linux-gnu
Target: ppc64le-linux-gnu
Following causes an ICE:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/fold-vec-splat-floatdouble.c
-O2 -ffloat-store
during RTL pass: fwprop1
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/fold-vec-splat-floatdouble.c:
In function ‘testf_08’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/fold-vec-splat-floatdouble.c:14:1:
internal compiler error: in simplify_binary_operation_1, at simplify-rtx.c:3637
14 | vector float testf_08 (vector float x) { return vec_splat (x, 0b01000); }
| ^~~~~~
0xfbcfb2 simplify_binary_operation_1
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:3637
0xfb6666 simplify_binary_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:2167
0xfaef1a simplify_gen_binary(rtx_code, machine_mode, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:194
0x19c4257 propagate_rtx_1
/home/marxin/Programming/gcc/gcc/fwprop.c:508
0x19c4159 propagate_rtx_1
/home/marxin/Programming/gcc/gcc/fwprop.c:494
0x19c4c2a propagate_rtx
/home/marxin/Programming/gcc/gcc/fwprop.c:692
0x19c674f forward_propagate_and_simplify
/home/marxin/Programming/gcc/gcc/fwprop.c:1355
0x19c6967 forward_propagate_into
/home/marxin/Programming/gcc/gcc/fwprop.c:1414
0x19c6c77 fwprop
/home/marxin/Programming/gcc/gcc/fwprop.c:1503
0x19c6cf4 execute
/home/marxin/Programming/gcc/gcc/fwprop.c:1534
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Subject: [Bug target/86681] ICE in extract_insn, at recog.c:2304 on s390x
Date: Mon, 03 Sep 2018 07:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86681
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
May I please ping that?
>From gcc-bugs-return-614433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 07:03:39 2018
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Subject: [Bug target/87196] New: ICE in vectorizable_load, at tree-vect-stmts.c:8043
Date: Mon, 03 Sep 2018 07:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87196
Bug ID: 87196
Summary: ICE in vectorizable_load, at tree-vect-stmts.c:8043
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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CC: rdsandiford at googlemail dot com
Target Milestone: ---
Following causes an ICE:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/g++.target/aarch64/sve/catch_2.C
-mstrict-align -Ofast --param vect-epilogues-nomask=1
during GIMPLE pass: vect
In file included from
/home/marxin/Programming/gcc/gcc/testsuite/g++.target/aarch64/sve/catch_2.C:4:
/home/marxin/Programming/gcc/gcc/testsuite/g++.target/aarch64/sve/catch_1.C: In
function ‘void f2(int (*)[100], int*)’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.target/aarch64/sve/catch_1.C:26:1:
internal compiler error: in vectorizable_load, at tree-vect-stmts.c:8043
26 | f2 (int x[40][100], int *y)
| ^~
0x166907d vectorizable_load
/home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:8043
0x166ecc4 vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:9720
0x1693065 vect_transform_loop_stmt
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:8267
0x1693db9 vect_transform_loop(_loop_vec_info*)
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:8489
0x16ba5fb try_vectorize_loop_1
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:943
0x16ba7d9 try_vectorize_loop_1
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:976
0x16ba895 try_vectorize_loop
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:993
0x16baa71 vectorize_loops()
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1075
0x1546e4d execute
/home/marxin/Programming/gcc/gcc/tree-ssa-loop.c:414
>From gcc-bugs-return-614434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 07:04:13 2018
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Subject: [Bug target/87196] ICE in vectorizable_load, at tree-vect-stmts.c:8043
Date: Mon, 03 Sep 2018 07:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87196
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-9-3
CC| |ktkachov at gcc dot gnu.org,
| |ramana at gcc dot gnu.org
Target Milestone|--- |9.0
>From gcc-bugs-return-614435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 07:16:02 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87197] New: [9 Regression] ICE in is_gimple_reg_type at gimple-expr.h:75 since r264021
Date: Mon, 03 Sep 2018 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87197
Bug ID: 87197
Summary: [9 Regression] ICE in is_gimple_reg_type at
gimple-expr.h:75 since r264021
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Following isolated snippet from perlbench cases an ICE:
$ cat pp_pack.i
int a, c, e, f, g;
void
h (int i)
{
a = i;
}
void
j (char *i, long k)
{
while (k--)
c = *i++;
}
void
l (unsigned char *i, long k)
{
unsigned char *b = i + k;
while (i < b)
{
h (*i);
i++;
}
}
void
m ()
{
while (e)
{
float d = g;
l ((char *) &d, sizeof (g));
if (f)
j ((char *) &d, sizeof (g));
}
}
$ gcc pp_pack.i -c -O3
during GIMPLE pass: cunrolli
pp_pack.i: In function ‘m’:
pp_pack.i:24:1: internal compiler error: Segmentation fault
24 | m ()
| ^
0xd34cc6 crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xa87ce5 is_gimple_reg_type
/home/marxin/Programming/gcc/gcc/gimple-expr.h:75
0xa87ce5 is_gimple_val(tree_node*)
/home/marxin/Programming/gcc/gcc/gimple-expr.c:789
0xd6be39 verify_gimple_assign_unary
/home/marxin/Programming/gcc/gcc/tree-cfg.c:3576
0xd7dc61 verify_gimple_in_cfg(function*, bool)
/home/marxin/Programming/gcc/gcc/tree-cfg.c:5360
0xc5072e execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1943
0xc5104a execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:1997
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Subject: [Bug tree-optimization/87197] [9 Regression] ICE in is_gimple_reg_type at gimple-expr.h:75 since r264021
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-03
Known to work| |8.2.0
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
>From gcc-bugs-return-614437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 07:54:00 2018
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Subject: [Bug middle-end/59521] __builtin_expect not effective in switch
Date: Mon, 03 Sep 2018 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59521
--- Comment #20 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Sep 3 07:51:56 2018
New Revision: 264050
URL: https://gcc.gnu.org/viewcvs?rev=264050&root=gcc&view=rev
Log:
Make __builtin_expect effective in switch statements (PR middle-end/PR59521).
2018-09-03 Martin Liska <mliska@suse.cz>
PR middle-end/59521
* predict.c (set_even_probabilities): Add likely_edges
argument and handle cases where we have precisely one
likely edge.
(combine_predictions_for_bb): Catch also likely_edges.
(tree_predict_by_opcode): Handle gswitch statements.
* tree-cfg.h (find_case_label_for_value): New declaration.
(find_taken_edge_switch_expr): Likewise.
* tree-switch-conversion.c (switch_decision_tree::balance_case_nodes):
Find pivot in decision tree based on probabily, not by number of
nodes.
2018-09-03 Martin Liska <mliska@suse.cz>
PR middle-end/59521
* c-c++-common/pr59521-1.c: New test.
* c-c++-common/pr59521-2.c: New test.
* gcc.dg/tree-prof/pr59521-3.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr59521-1.c
trunk/gcc/testsuite/c-c++-common/pr59521-2.c
trunk/gcc/testsuite/gcc.dg/tree-prof/pr59521-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/predict.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
trunk/gcc/tree-cfg.h
trunk/gcc/tree-switch-conversion.c
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Subject: [Bug middle-end/59521] __builtin_expect not effective in switch
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #21 from Martin Liška <marxin at gcc dot gnu.org> ---
Done.
>From gcc-bugs-return-614439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 07:59:08 2018
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/84980] [concepts] ICE with missing typename in concept
Date: Mon, 03 Sep 2018 07:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84980
--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Mon Sep 3 07:57:33 2018
New Revision: 264051
URL: https://gcc.gnu.org/viewcvs?rev=264051&root=gcc&view=rev
Log:
/cp
2018-09-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/84980
* constraint.cc (finish_shorthand_constraint): Early return if the
constraint is erroneous.
/testsuite
2018-09-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/84980
* g++.dg/concepts/pr84980.C: New.
Added:
trunk/gcc/testsuite/g++.dg/concepts/pr84980.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constraint.cc
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 08:21:30 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
Date: Mon, 03 Sep 2018 08:21:00 -0000
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--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Sep 3 08:16:27 2018
New Revision: 264052
URL: https://gcc.gnu.org/viewcvs?rev=264052&root=gcc&view=rev
Log:
Come up with TARGET_GET_VALID_OPTION_VALUES option hook (PR driver/83193).
2018-09-03 Martin Liska <mliska@suse.cz>
PR driver/83193
* common/common-target.def: Add TARGET_GET_VALID_OPTION_VALUES.
* common/common-targhooks.c (default_get_valid_option_values):
New function.
* common/common-targhooks.h (default_get_valid_option_values):
Likewise.
* common/config/i386/i386-common.c: Move processor_target_table
from i386.c.
(ix86_get_valid_option_values): New function.
(TARGET_GET_VALID_OPTION_VALUES): New macro.
* config/i386/i386.c (struct ptt): Move to i386-common.c.
(PTA_*): Move all defined masks into i386-common.c.
(ix86_function_specific_restore): Use new processor_cost_table.
* config/i386/i386.h (struct ptt): Moved from i386.c.
(struct pta): Likewise.
* doc/tm.texi: Document new TARGET_GET_VALID_OPTION_VALUES.
* doc/tm.texi.in: Likewise.
* opt-suggestions.c (option_proposer::suggest_option):
Pass prefix to build_option_suggestions.
(option_proposer::get_completions): Likewise.
(option_proposer::build_option_suggestions): Use the new target
hook.
* opts.c (struct option_help_tuple): New struct.
(print_filtered_help): Use the new target hook.
2018-09-03 Martin Liska <mliska@suse.cz>
PR driver/83193
* gcc.dg/completion-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/completion-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common/common-target.def
trunk/gcc/common/common-targhooks.c
trunk/gcc/common/common-targhooks.h
trunk/gcc/common/config/i386/i386-common.c
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/opt-suggestions.c
trunk/gcc/opt-suggestions.h
trunk/gcc/opts.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 08:41:49 2018
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Subject: [Bug target/87198] New: ICE in extract_insn, at recog.c:2304
Date: Mon, 03 Sep 2018 08:41:00 -0000
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Bug ID: 87198
Summary: ICE in extract_insn, at recog.c:2304
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hjl at gcc dot gnu.org, jakub at gcc dot gnu.org, uros at gcc dot gnu.org
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Host: x86_64-linux-gnu
Following causes ICE:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/xsavec-1.c
-mxsavec -mno-sse2
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/xsavec-1.c: In
function ‘test_xsavec’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/xsavec-1.c:11:1:
error: unrecognizable insn:
}
^
(insn 14 13 17 2 (set (mem:BLK (reg:DI 89) [0 A8])
(unspec_volatile:BLK [
(subreg:SI (reg:DI 90) 0)
(subreg:SI (reg:DI 91) 0)
] UNSPECV_XSAVEC))
"/usr/lib64/gcc/x86_64-suse-linux/8/include/xsavecintrin.h":41 -1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/xsavec-1.c:11:1:
internal compiler error: in extract_insn, at recog.c:2304
0x7ffff6996fea __libc_start_main
../csu/libc-start.c:308
>From gcc-bugs-return-614442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 08:48:03 2018
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Subject: [Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
Date: Mon, 03 Sep 2018 08:48:00 -0000
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> So fixed on the trunk? Any plans to backport?
Will do, thanks for the ping.
>From gcc-bugs-return-614443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:04:13 2018
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
Date: Mon, 03 Sep 2018 09:04:00 -0000
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
In some sense, the bug is that .original is optimized at all, ideally it would
be the "original" unoptimized code. It is convenient to start optimizing single
expressions early, so we do it, but that's it.
>From gcc-bugs-return-614444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:05:31 2018
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Subject: [Bug tree-optimization/87169] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
Date: Mon, 03 Sep 2018 09:05:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's two issues I think though fixing the first makes us no longer run into
the second. The first is that I again forgot to mark a destination block
executable after marking an edge so ... (doh).
The second one is that when marking loop headers as not need iterating we
can face the situation (as with the CFG in this testcase) that a backedge
into its header is _not_ a latch of it but part of an outer irreducible
region which we may end up iterating and thus we need to continue iterating
the loop we try to mark not needing that.
Even though I lack a testcase for the latter issue I'll fix that as well.
(fixing only that results in endless iteration - sth you'd expect)
>From gcc-bugs-return-614445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:07:28 2018
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 09:07:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah yes, good point. So it's user error, but we could try to give a better
diagnostic.
>From gcc-bugs-return-614446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:13:35 2018
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Subject: [Bug tree-optimization/87176] [9 Regression] wrong code at -Os and above on x86-64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:13:38 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 09:13:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Generally certainly can't, one can define the inline variable in one TU and the
non-inline for the same section in a different TU.
If both are in the same TU, we could, but we don't have any mapping between the
user defined sections and decls that are put into those.
>From gcc-bugs-return-614448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:14:12 2018
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Subject: [Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:15:56 2018
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Subject: [Bug libstdc++/87193] symbols in <version> have inconsistent types
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, this was noted at https://gcc.gnu.org/ml/libstdc++/2018-07/msg00128.html
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Subject: [Bug libfortran/87182] libbacktrace does not use GCC own zlib
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Really a libbacktrace issue but we don't have a proper component for that.
>From gcc-bugs-return-614451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:18:22 2018
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Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Now we do.
>From gcc-bugs-return-614452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:18:29 2018
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Subject: [Bug libstdc++/87193] symbols in <version> have inconsistent types
Date: Mon, 03 Sep 2018 09:18:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm not in a rush to fix this, because sane code should only be using those
values in preprocessor conditions. They have type long only because the
standard doesn't guarantee that type int can represent 6 decimal digits, not
because anybody should care about the type.
>From gcc-bugs-return-614453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:20:34 2018
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Subject: [Bug tree-optimization/87184] generic-match.c:55076:1: ICE: Segmentation fault
Date: Mon, 03 Sep 2018 09:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to John David Anglin from comment #1)
> Created attachment 44645 [details]
> Preprocessed source
>
> We might be running out of memory.
Can you check that somehow? r263931 added some more patterns so
generic-match.c grow.
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Subject: [Bug tree-optimization/87186] Does not inline constant to simplify bitwise expression
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yes. And I doubt we'll add 'const' expression initializer "inlining" for early
folding in the FEs.
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Subject: [Bug lto/87187] FAIL: gfortran.dg/short_circuiting_3.f90 -g -flto (internal compiler error) on darwin
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably reproduces on x86_64-linux when you compile with -g0 and link with -g
(didn't check).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86549
[Bug 86549] [8/9 Regression] -flto -g0 vs. -g issues
>From gcc-bugs-return-614456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:26:30 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87194] Associative container cannot be inserted from move iterators that refer to elements implicitly convertible to value_type
Date: Mon, 03 Sep 2018 09:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87194
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is the same problem as PR 78595
>From gcc-bugs-return-614457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:28:16 2018
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From: "me at nvartolomei dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/87199] New: Thread local storage dynamic initialization behaviour differs Linux vs macOS
Date: Mon, 03 Sep 2018 09:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87199
Bug ID: 87199
Summary: Thread local storage dynamic initialization behaviour
differs Linux vs macOS
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: me at nvartolomei dot com
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Hello,
Here is a test program that behaves different on Linux vs macOS.
main.c:
```
#include "lib.h"
int main() {
getProfileEvents();
}
```
lib.cpp
```
#include "lib.h"
thread_local ThreadStatus thread_local_var = ThreadStatus();
ThreadStatus::ThreadStatus() {
std::cout << "cons";
doX();
}
```
lib.h
```
#pragma once
#include <memory>
#include <iostream>
class ThreadStatus {
public:
int x = 0;
ThreadStatus();
static void doX() { std::cout << "test"; }
};
extern thread_local ThreadStatus thread_local_var;
static int getProfileEvents() {
return thread_local_var.x;
}
```
Compiling it using the following command:
`g++-8 -g -std=c++17 -c -I . main.cpp && g++-8 -g -std=c++17 -c -I . lib.cpp
&& g++-8 -o main main.o lib.o && ./main`
On a Linux machine the output is: "constest" (g++-8 (Ubuntu
8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk revision 259383])
On a macOS machine the output is empty. (Homebrew GCC 8.2.0, also HEAD)
I found curious that moving doX definition from .h file to .cpp will make this
work correctly.
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 09:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, "interesting" case. Not sure what to do about these...
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 09:35:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
OK.
FWIW Clang seems to create two different sections called foo, one COMDAT and
one not.
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Subject: [Bug c/87192] -Warray-bounds (even =2) does not work on struct members
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-03
Blocks| |56456
Ever confirmed|0 |1
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is the array isn't visible in the IL anymore but we have
bar (&MEM[(void *)&s + 48B]);
The first CCP pass already propagates the constant pointer from
_1 = &s.a + 48;
bar (_1);
to the above.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
>From gcc-bugs-return-614461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:37:20 2018
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Subject: [Bug tree-optimization/87197] [9 Regression] ICE in is_gimple_reg_type at gimple-expr.h:75 since r264021
Date: Mon, 03 Sep 2018 09:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:37:59 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 09:37:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is a glibc bug, coming up with a set of weakref checks for gthr.h that
would satisfy static linking of glibc and all possible combinations of included
vs. non-included objects is impossible.
E.g. Fedora/RHEL ld -r libpthread.a objects into a single exactly because of
this.
The other alternative is to add (for libpthread.a) dependencies in betweeh the
*.o objects so that a reasonable set is always linked together, or just link
with --whole-archive -lpthread --no-whole-archive.
There are many dups of this both on the gcc side and glibc side.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 09:42:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #6)
> OK.
>
> FWIW Clang seems to create two different sections called foo, one COMDAT and
> one not.
Does it? That is I think impossible unless bypassing assembler.
If I try godbolt and look at clang++ trunk generated assembly, it doesn't honor
the user sections at all, whether using inline vars or not.
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Subject: [Bug tree-optimization/85859] [6/7/8 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85859
--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Sep 3 09:43:46 2018
New Revision: 264053
URL: https://gcc.gnu.org/viewcvs?rev=264053&root=gcc&view=rev
Log:
backport "[tail-merge] Fix side-effect test in stmt_local_def"
2018-09-03 Tom de Vries <tdevries@suse.de>
backport from trunk:
2018-06-21 Tom de Vries <tdevries@suse.de>
PR tree-optimization/85859
* tree-ssa-tail-merge.c (stmt_local_def): Copy gimple_is_call
test with comment from bb_no_side_effects_p.
* gcc.dg/pr85859.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr85859.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-tail-merge.c
>From gcc-bugs-return-614466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:46:52 2018
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Subject: [Bug tree-optimization/87200] New: [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3629
Date: Mon, 03 Sep 2018 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87200
Bug ID: 87200
Summary: [9 Regression] ICE in set_ssa_val_to, at
tree-ssa-sccvn.c:3629
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180902 snapshot (r264045) ICEs when compiling the following
snippet w/ any optimization level:
unsigned long long int ry;
int
gl (void)
{
long long int my = 0;
unsigned long long int *oi = (unsigned long long int *) &my;
int s9;
s9 = !!gl () ? ry : 0;
if (s9 != 0)
oi = &ry;
else
{
my = ry;
*oi += my;
}
return *oi;
}
% gcc-9.0.0-alpha20180902 -O1 -c piukefl9.c
during GIMPLE pass: fre
piukefl9.c: In function 'gl':
piukefl9.c:20:1: internal compiler error: in set_ssa_val_to, at
tree-ssa-sccvn.c:3629
20 | }
| ^
0x69bc1b set_ssa_val_to
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:3629
0xe61819 visit_reference_op_load
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:3985
0xe61819 visit_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:4359
0xe630ac process_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:5980
0xe64468 do_rpo_vn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:6406
0xe651cc execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:6598
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Subject: [Bug c++/87178] Compilation failure when program contains multiple variables allocated in particular section, and at least one variable is C++17 "inline"
Date: Mon, 03 Sep 2018 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87178
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah I misread it then.
>From gcc-bugs-return-614467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 09:55:58 2018
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87201] New: [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Date: Mon, 03 Sep 2018 09:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87201
Bug ID: 87201
Summary: [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Build: x86_64-pc-linux-gnu
Created attachment 44650
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44650&action=edit
Test case, compiled with "g++ test.ii"
That's with GCC 9. I did this morning a bootstrip (incremental build) with
r264051 - and installed it. A "git pull" then made r264052 available. Using the
previous build as system compiler failed with:
../../gcc/genoutput.c:276:1: internal compiler error: Segmentation fault
(Attached is a more simplified test case, which crashes my r264051.
TODO: bisect; [me: use clean GCC bootstrap not incremental build].)
g++ -w input21.ii
during GIMPLE pass: switchlower_O0
input21.ii: In function ‘long unsigned int ParseBinary(const char*,
XPParser**)’:
input21.ii:7:26: internal compiler error: Segmentation fault
7 | static long unsigned int ParseBinary (const char *str, XPParser ** p) {
| ^~~~~~~~~~~
0xed326f crash_signal
../../gcc/toplev.c:325
0xfb4198
tree_switch_conversion::switch_decision_tree::balance_case_nodes(tree_switch_conversion::case_tree_node**,
tree_switch_conversion::case_tree_node*)
../../gcc/tree-switch-conversion.c:1944
0xfb4fca tree_switch_conversion::switch_decision_tree::emit(basic_block_def*,
tree_node*, profile_probability, tree_node*)
../../gcc/tree-switch-conversion.c:1869
0xfb634e
tree_switch_conversion::switch_decision_tree::try_switch_expansion(vec<tree_switch_conversion::cluster*,
va_heap, vl_ptr>&)
../../gcc/tree-switch-conversion.c:1783
0xfb6c2f
tree_switch_conversion::switch_decision_tree::analyze_switch_statement()
../../gcc/tree-switch-conversion.c:1709
0xfb72c2 execute
../../gcc/tree-switch-conversion.c:2444
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Subject: [Bug tree-optimization/87202] New: [9 Regression] ICE in vn_reference_insert_pieces, at tree-ssa-sccvn.c:2752
Date: Mon, 03 Sep 2018 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87202
Bug ID: 87202
Summary: [9 Regression] ICE in vn_reference_insert_pieces, at
tree-ssa-sccvn.c:2752
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
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Target Milestone: ---
gcc-9.0.0-alpha20180902 snapshot (r264045) ICEs when compiling the following
snippet w/ -O1 (-Og):
int dk;
void
lv (void)
{
int nm;
dk = 1;
while (dk != 0)
{
}
if (1 / 0)
{
dk = 0;
while (dk != 0)
{
}
}
for (;;)
nm = !!dk;
(void) nm;
}
% gcc-9.0.0-alpha20180902 -O1 -w -c znz65qpd.c
during GIMPLE pass: fre
znz65qpd.c: In function 'lv':
znz65qpd.c:25:1: internal compiler error: in vn_reference_insert_pieces, at
tree-ssa-sccvn.c:2752
25 | }
| ^
0x69c31f vn_reference_insert_pieces(tree_node*, int, tree_node*,
vec<vn_reference_op_struct, va_heap, vl_ptr>, tree_node*, unsigned int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:2752
0xe5e153 vn_reference_lookup_or_insert_for_pieces
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:1728
0xe5ee1c vn_reference_lookup_3
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:2182
0xdaa643 walk_non_aliased_vuses(ao_ref*, tree_node*, void* (*)(ao_ref*,
tree_node*, unsigned int, void*), void* (*)(ao_ref*, tree_node*, void*, bool*),
tree_node* (*)(tree_node*), void*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-alias.c:2833
0xe5b796 vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:2630
0xe61748 visit_reference_op_load
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:3961
0xe61748 visit_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:4359
0xe630ac process_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:5980
0xe64468 do_rpo_vn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:6406
0xe651cc execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/tree-ssa-sccvn.c:6598
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Subject: [Bug tree-optimization/85859] [6/7 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
Date: Mon, 03 Sep 2018 10:04:00 -0000
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--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Sep 3 10:04:08 2018
New Revision: 264054
URL: https://gcc.gnu.org/viewcvs?rev=264054&root=gcc&view=rev
Log:
backport "[tail-merge] Fix side-effect test in stmt_local_def"
2018-09-03 Tom de Vries <tdevries@suse.de>
backport from trunk:
2018-06-21 Tom de Vries <tdevries@suse.de>
PR tree-optimization/85859
* tree-ssa-tail-merge.c (stmt_local_def): Copy gimple_is_call
test with comment from bb_no_side_effects_p.
* gcc.dg/pr85859.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr85859.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-tail-merge.c
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Date: Mon, 03 Sep 2018 10:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87201
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
[Now did clean bootstrap; result below is the same for the Stage1 compiler
(compiled by GCC 8) as for the incremental build of GCC 9.]
Culprit is probably r264050:
Make __builtin_expect effective in switch statements (PR
middle-end/PR59521).
Running cc1plus in the debugger shows that the crash is for:
tree_switch_conversion::switch_decision_tree::balance_case_nodes at
../../gcc/tree-switch-conversion.c:1944
1944 prob -= (*npp)->m_c->m_prob;
where
(gdb) p npp
$1 = (tree_switch_conversion::case_tree_node **) 0x2934f28
(gdb) p *npp
$2 = (tree_switch_conversion::case_tree_node *) 0x0
(gdb) p *npp
>From gcc-bugs-return-614471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 10:11:52 2018
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Subject: [Bug web/87050] Bump wwwdocs to html5
Date: Mon, 03 Sep 2018 10:11:00 -0000
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--- Comment #11 from Janne Blomqvist <jb at gcc dot gnu.org> ---
(In reply to Gerald Pfeifer from comment #10)
> (In reply to Janne Blomqvist from comment #0)
> > So apart from the headers, little work ought to be needed for the
> > conversion itself.
>
> Well, no. :-} https://gcc.gnu.org/ml/gcc-patches/2018-09/ speaks a
> different language, and that's just part of it, after all I did the
> last year(s) already.
Indeed, it seems I grossly underestimated the amount of work required. Thanks
for doing it!
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Subject: [Bug tree-optimization/85859] [6 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
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--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Sep 3 10:14:52 2018
New Revision: 264055
URL: https://gcc.gnu.org/viewcvs?rev=264055&root=gcc&view=rev
Log:
backport "[tail-merge] Fix side-effect test in stmt_local_def"
2018-09-03 Tom de Vries <tdevries@suse.de>
backport from trunk:
2018-06-21 Tom de Vries <tdevries@suse.de>
PR tree-optimization/85859
* tree-ssa-tail-merge.c (stmt_local_def): Copy gimple_is_call
test with comment from bb_no_side_effects_p.
* gcc.dg/pr85859.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr85859.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-tail-merge.c
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Subject: [Bug tree-optimization/85859] wrong code with -fno-isolate-erroneous-paths-dereference
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |vries at gcc dot gnu.org
Summary|[6 Regression] wrong code |wrong code with
|with |-fno-isolate-erroneous-path
|-fno-isolate-erroneous-path |s-dereference
|s-dereference |
--- Comment #11 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch with test-case committed to trunk and backported.
Marking resolved-fixed.
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-03
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44651
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44651&action=edit
gcc9-pr87198.patch
Bug in the option handling, -mxsavec turned on -mxsave and relied on that, but
-mno-xsave didn't turn off -mxsave{opt,c,s}.
>From gcc-bugs-return-614475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 10:22:33 2018
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
I think you also need:
diff --git a/gcc/common/config/i386/i386-common.c
b/gcc/common/config/i386/i386-common.c
index 70b3c3f2fc31..edb55e542451 100644
--- a/gcc/common/config/i386/i386-common.c
+++ b/gcc/common/config/i386/i386-common.c
@@ -181,7 +181,7 @@ along with GCC; see the file COPYING3. If not see
#define OPTION_MASK_ISA_AVX_UNSET \
(OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_FMA_UNSET \
| OPTION_MASK_ISA_FMA4_UNSET | OPTION_MASK_ISA_F16C_UNSET \
- | OPTION_MASK_ISA_AVX2_UNSET | OPTION_MASK_ISA_XSAVE_UNSET)
+ | OPTION_MASK_ISA_AVX2_UNSET)
#define OPTION_MASK_ISA_FMA_UNSET OPTION_MASK_ISA_FMA
#define OPTION_MASK_ISA_FXSR_UNSET OPTION_MASK_ISA_FXSR
#define OPTION_MASK_ISA_XSAVE_UNSET \
so -mno-avx won't turn off -mxsave.
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #2)
> I think you also need:
>
> diff --git a/gcc/common/config/i386/i386-common.c
> b/gcc/common/config/i386/i386-common.c
> index 70b3c3f2fc31..edb55e542451 100644
> --- a/gcc/common/config/i386/i386-common.c
> +++ b/gcc/common/config/i386/i386-common.c
> @@ -181,7 +181,7 @@ along with GCC; see the file COPYING3. If not see
> #define OPTION_MASK_ISA_AVX_UNSET \
> (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_FMA_UNSET \
> | OPTION_MASK_ISA_FMA4_UNSET | OPTION_MASK_ISA_F16C_UNSET \
> - | OPTION_MASK_ISA_AVX2_UNSET | OPTION_MASK_ISA_XSAVE_UNSET)
> + | OPTION_MASK_ISA_AVX2_UNSET)
> #define OPTION_MASK_ISA_FMA_UNSET OPTION_MASK_ISA_FMA
> #define OPTION_MASK_ISA_FXSR_UNSET OPTION_MASK_ISA_FXSR
> #define OPTION_MASK_ISA_XSAVE_UNSET \
>
> so -mno-avx won't turn off -mxsave.
Why shouldn't it turn off -mxsave? -mavx sets -mxsave too.
I mean, otherwise if one does say on -m32 do -mavx -mno-avx, then won't that
turn on -mxsave and not turn it off again? Or with target pragmas.
I believe we generally want consistency, if option ABC turns automatically
option DEF, then turning off option DEF explicitly disables option ABC.
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Subject: [Bug tree-optimization/87176] [9 Regression] wrong code at -Os and above on x86-64-linux-gnu
Date: Mon, 03 Sep 2018 10:50:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue here is similar to that of PR87132 - this time we get at memory state
from the previous iteration by means of a virtual PHI that was value-numbered
to its backedge value.
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 10:53:26 2018
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Subject: [Bug tree-optimization/87202] [9 Regression] ICE in vn_reference_insert_pieces, at tree-ssa-sccvn.c:2752
Date: Mon, 03 Sep 2018 10:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug tree-optimization/87200] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3629
Date: Mon, 03 Sep 2018 10:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 10:58:09 2018
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Date: Mon, 03 Sep 2018 10:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It ICEs all over the testsuite in the same way ...
Confirmed (but bootstrap worked OK for me).
>From gcc-bugs-return-614482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:04:20 2018
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Subject: [Bug libstdc++/78595] Unnecessary copies in _Rb_tree
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:06:50 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87203] New: Optimize x % constant ==/!= 0
Date: Mon, 03 Sep 2018 11:06:00 -0000
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Bug ID: 87203
Summary: Optimize x % constant ==/!= 0
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As mentioned in
http://duriansoftware.com/joe/Optimizing-is-multiple-checks-with-modular-arithmetic.html
, we could optimize unsigned
x % const == 0
or
x % const != 0
into a single (non-highpart) multiplication plus comparison (at least for odd
const, for even const we can rotate before comparison if target has cheap
rotates, or could test low bits and compare).
Obviously, for power of two const we already emit the best code.
>From gcc-bugs-return-614484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:07:33 2018
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:18:19 2018
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
Date: Mon, 03 Sep 2018 11:18:00 -0000
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> (In reply to Uroš Bizjak from comment #2)
> > I think you also need:
> >
> > diff --git a/gcc/common/config/i386/i386-common.c
> > b/gcc/common/config/i386/i386-common.c
> > index 70b3c3f2fc31..edb55e542451 100644
> > --- a/gcc/common/config/i386/i386-common.c
> > +++ b/gcc/common/config/i386/i386-common.c
> > @@ -181,7 +181,7 @@ along with GCC; see the file COPYING3. If not see
> > #define OPTION_MASK_ISA_AVX_UNSET \
> > (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_FMA_UNSET \
> > | OPTION_MASK_ISA_FMA4_UNSET | OPTION_MASK_ISA_F16C_UNSET \
> > - | OPTION_MASK_ISA_AVX2_UNSET | OPTION_MASK_ISA_XSAVE_UNSET)
> > + | OPTION_MASK_ISA_AVX2_UNSET)
> > #define OPTION_MASK_ISA_FMA_UNSET OPTION_MASK_ISA_FMA
> > #define OPTION_MASK_ISA_FXSR_UNSET OPTION_MASK_ISA_FXSR
> > #define OPTION_MASK_ISA_XSAVE_UNSET \
> >
> > so -mno-avx won't turn off -mxsave.
>
> Why shouldn't it turn off -mxsave? -mavx sets -mxsave too.
> I mean, otherwise if one does say on -m32 do -mavx -mno-avx, then won't that
> turn on -mxsave and not turn it off again? Or with target pragmas.
> I believe we generally want consistency, if option ABC turns automatically
> option DEF, then turning off option DEF explicitly disables option ABC.
Please see recent discussion in PR87171#c4.
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/87199] Thread local storage dynamic initialization behaviour differs Linux vs macOS
Date: Mon, 03 Sep 2018 11:31:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
My first guess would be that the difference is Linux has native TLS, whereas
macOS only has emutls, which would be bug 52268. I'll wait for someone else to
confirm, though.
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Subject: [Bug sanitizer/87191] UBSan doesn't catch invalid pointer arithmetic outside known object bounds
Date: Mon, 03 Sep 2018 11:31:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I believe it's nice example where ASAN can help:
$ cat pr87191.c
void bar(void *ptr)
{
__builtin_putchar (*(char *)ptr);
}
int main()
{
char a[10];
bar(&a+2);
}
$ =================================================================
==17684==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7fffffffdb84 at pc 0x000000401192 bp 0x7fffffffdb20 sp 0x7fffffffdb18
READ of size 1 at 0x7fffffffdb84 thread T0
#0 0x401191 in bar (/home/marxin/Programming/testcases/a.out+0x401191)
#1 0x40122a in main (/home/marxin/Programming/testcases/a.out+0x40122a)
#2 0x7ffff6c71fea in __libc_start_main ../csu/libc-start.c:308
#3 0x4010a9 in _start (/home/marxin/Programming/testcases/a.out+0x4010a9)
Address 0x7fffffffdb84 is located in stack of thread T0 at offset 52 in frame
#0 0x4011b5 in main (/home/marxin/Programming/testcases/a.out+0x4011b5)
This frame has 1 object(s):
[32, 42) 'a' <== Memory access at offset 52 overflows this variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
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Subject: [Bug middle-end/87203] Optimize x % constant ==/!= 0
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Dup of PR 82853 ?
>From gcc-bugs-return-614489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:38:28 2018
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Subject: [Bug middle-end/87203] Optimize x % constant ==/!= 0
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup indeed.
*** This bug has been marked as a duplicate of bug 82853 ***
>From gcc-bugs-return-614490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:38:28 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 87203 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:41:23 2018
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Subject: [Bug tree-optimization/87200] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3629
Date: Mon, 03 Sep 2018 11:41:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The underlying issue is that match-and-simplify invoked via
vn_nary_build_or_lookup_1 valuezies captures according to availability.
But in the end we'd like to have a value-number back.
>From gcc-bugs-return-614493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:41:45 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 11:41:00 -0000
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
http://duriansoftware.com/joe/Optimizing-is-multiple-checks-with-modular-arithmetic.html
Do we want to do this at GIMPLE time ignoring costs, or during expansion time?
Doing it later has the benefit that we can compare costs and could avoid
breaking say divmod recognition, or finding out multiple uses of the modulo,
etc.
Doing it earlier has the benefit for vectorization I guess, otherwise we need a
pattern recognizer that will work like the expansion.
>From gcc-bugs-return-614492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 11:41:33 2018
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Subject: [Bug tree-optimization/87184] generic-match.c:55076:1: ICE: Segmentation fault
Date: Mon, 03 Sep 2018 11:41:00 -0000
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--- Comment #3 from dave.anglin at bell dot net ---
On 2018-09-03 5:20 AM, rguenth at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87184
>
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2018-09-03
> Ever confirmed|0 |1
>
> --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to John David Anglin from comment #1)
>> Created attachment 44645 [details]
>> Preprocessed source
>>
>> We might be running out of memory.
> Can you check that somehow? r263931 added some more patterns so
> generic-match.c grow.
I'm not sure. When I compiled generic-match.c manually, it completed
successfully. I restarted
the build and the compile failed again at stage3. At stage2, the
compile now takes on the order
of half an hour...
I had started a regression search. I'll check if r263931 introduced the
problem.
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Subject: [Bug libstdc++/87194] Associative container cannot be inserted from move iterators that refer to elements implicitly convertible to value_type
Date: Mon, 03 Sep 2018 11:55:00 -0000
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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ktkachov at gcc dot gnu.org changed:
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--- Comment #15 from ktkachov at gcc dot gnu.org ---
I tried to do something similar at
https://gcc.gnu.org/ml/gcc-patches/2015-07/msg02005.html and the feedback was
that we should do this at expand time
>From gcc-bugs-return-614496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 12:52:57 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2016-01-29 00:00:00 |2018-08-16 0:00
--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Still present in gcc 9.
>From gcc-bugs-return-614497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 13:05:43 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For unsigned x % y == z if y is odd constant we can handle it for any constant
z, by computing m = mul_inv (y, 2^prec) and d = (2^prec / y) and using x * m -
(z * m) < d .
For even y, not sure if it can work for anything but z == 0; for z == 0 we can
do
s = ctz (y); y_ = y >> s; m = mul_inv (y_, 2^prec); d = (2^prec / y_);
and use ((x * m) r>> s) < d .
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Subject: [Bug libquadmath/87204] New: strtoflt128 produces different results for subnormals with -m32 and -m64
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Bug ID: 87204
Summary: strtoflt128 produces different results for subnormals
with -m32 and -m64
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The testcase:
#include <quadmath.h>
#include <stdio.h>
#include <inttypes.h>
int main ()
{
union {
__float128 f;
uint64_t i64[2];
} u = { .f = strtoflt128("1e-4941", NULL) };
printf("%016" PRIx64 " %016" PRIx64 "\n", u.i64[1], u.i64[0]);
}
$ gcc-7.3.0 t.c -lquadmath -lm -m32 && a.out
0000000000014707 e947d757fbf6f700
$ gcc-7.3.0 t.c -lquadmath -lm -m64 && a.out
0000000000014707 e946d257f2f674b9
The output is for x86-64, haven't tested for other platforms.
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Subject: [Bug tree-optimization/87197] [9 Regression] ICE in is_gimple_reg_type at gimple-expr.h:75 since r264021
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/87169] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/87197] [9 Regression] ICE in is_gimple_reg_type at gimple-expr.h:75 since r264021
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 3 13:28:25 2018
New Revision: 264057
URL: https://gcc.gnu.org/viewcvs?rev=264057&root=gcc&view=rev
Log:
2018-09-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/87197
* tree-ssa-sccvn.c (vn_nary_build_or_lookup_1): Mark the new def
visited. CSE the VN_INFO hashtable lookup.
* gcc.dg/torture/pr87197.c: New testcase.
PR tree-optimization/87169
* tree-ssa-sccvn.c (do_rpo_vn): When marking loops for not
iterating make sure there's no extra backedges from irreducible
regions feeding the header. Mark the destination block
executable.
* gcc.dg/torture/pr87169.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87169.c
trunk/gcc/testsuite/gcc.dg/torture/pr87197.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87169] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 3 13:28:25 2018
New Revision: 264057
URL: https://gcc.gnu.org/viewcvs?rev=264057&root=gcc&view=rev
Log:
2018-09-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/87197
* tree-ssa-sccvn.c (vn_nary_build_or_lookup_1): Mark the new def
visited. CSE the VN_INFO hashtable lookup.
* gcc.dg/torture/pr87197.c: New testcase.
PR tree-optimization/87169
* tree-ssa-sccvn.c (do_rpo_vn): When marking loops for not
iterating make sure there's no extra backedges from irreducible
regions feeding the header. Mark the destination block
executable.
* gcc.dg/torture/pr87169.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87169.c
trunk/gcc/testsuite/gcc.dg/torture/pr87197.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #17 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #16)
> For unsigned x % y == z if y is odd constant we can handle it for any
> constant z, by computing m = mul_inv (y, 2^prec) and d = (2^prec / y) and
> using x * m - (z * m) < d .
Is that preferable to testing (x - z) % y == 0? Why?
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Date: Mon, 03 Sep 2018 13:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87201
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Sep 3 13:35:35 2018
New Revision: 264058
URL: https://gcc.gnu.org/viewcvs?rev=264058&root=gcc&view=rev
Log:
Fix thinko (PR tree-optimization/87201).
2018-09-03 Martin Liska <mliska@suse.cz>
PR tree-optimization/87201
* tree-switch-conversion.c (switch_decision_tree::balance_case_nodes):
Fix parenthesis in an expression.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-switch-conversion.c
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Subject: [Bug middle-end/87201] [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Date: Mon, 03 Sep 2018 13:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed now.
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Subject: [Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu
Date: Mon, 03 Sep 2018 13:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87202 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/87202] [9 Regression] ICE in vn_reference_insert_pieces, at tree-ssa-sccvn.c:2752
Date: Mon, 03 Sep 2018 13:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed by same reversal as PR87177.
*** This bug has been marked as a duplicate of bug 87177 ***
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Subject: [Bug c++/87205] New: Inefficient code generation for switch
Date: Mon, 03 Sep 2018 14:07:00 -0000
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Bug ID: 87205
Summary: Inefficient code generation for switch
Product: gcc
Version: 9.0
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For the following code:
```
void f( int x );
void h( unsigned ix )
{
switch( ix )
{
case 0: f(42); break;
case 1: f(42); break;
case 2: f(42); break;
case 3: f(42); break;
case 4: f(42); break;
case 5: f(42); break;
default: __builtin_unreachable();
}
}
```
g++ 9.0 -O2, -O3 generates:
```
h(unsigned int):
cmp edi, 5
jbe .L5
.L5:
mov edi, 42
jmp f(int)
```
https://godbolt.org/z/4I_Chu
The initial part that compares edi to 5 is redundant.
At -O1 the result is a jump table that doesn't check edi, as expected:
```
h(unsigned int):
sub rsp, 8
mov edi, edi
jmp [QWORD PTR .L4[0+rdi*8]]
```
This is a simplified example; I've stripped the metaprogramming that produces
it. :-)
For comparison, g++ 8.2 produces
```
h(unsigned int):
cmp edi, 5
ja .L2
mov edi, 42
jmp f(int)
h(unsigned int) [clone .cold.0]:
.L2:
```
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/78595] Unnecessary copies in _Rb_tree
Date: Mon, 03 Sep 2018 14:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78595
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Sep 3 14:25:12 2018
New Revision: 264059
URL: https://gcc.gnu.org/viewcvs?rev=264059&root=gcc&view=rev
Log:
PR libstdc++/78595 implement insertion into maps in terms of emplace
C++14 simplified the specification of the generic insert function
templates to be equivalent to calling emplace (or emplace_hint).
Defining them in terms of emplace takes care of the problems described
in PR 78595, ensuring a single conversion to value_type is done at the
right time.
PR libstdc++/78595
* include/bits/stl_map.h (map::insert(_Pair&&))
(map::insert(const_iterator, _Pair&&)): Do emplace instead of insert.
* include/bits/stl_multimap.h (multimap::insert(_Pair&&))
(multimap::insert(const_iterator, _Pair&&)): Likewise.
* include/bits/unordered_map.h (unordered_map::insert(_Pair&&))
(unordered_map::insert(const_iterator, _Pair&&))
(unordered_multimap::insert(_Pair&&))
(unordered_multimap::insert(const_iterator, _Pair&&)): Likewise.
* testsuite/23_containers/map/modifiers/insert/78595.cc: New test.
* testsuite/23_containers/multimap/modifiers/insert/78595.cc: New test.
* testsuite/23_containers/unordered_map/modifiers/78595.cc: New test.
* testsuite/23_containers/unordered_multimap/modifiers/78595.cc: New
test.
Added:
trunk/libstdc++-v3/testsuite/23_containers/map/modifiers/insert/78595.cc
trunk/libstdc++-v3/testsuite/23_containers/multimap/modifiers/insert/78595.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/78595.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_multimap/modifiers/78595.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_map.h
trunk/libstdc++-v3/include/bits/stl_multimap.h
trunk/libstdc++-v3/include/bits/unordered_map.h
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87194] Associative container cannot be inserted from move iterators that refer to elements implicitly convertible to value_type
Date: Mon, 03 Sep 2018 14:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87194
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Sep 3 14:25:25 2018
New Revision: 264060
URL: https://gcc.gnu.org/viewcvs?rev=264060&root=gcc&view=rev
Log:
PR libstdc++/87194 fix range insertion into maps and sets
Since C++11 range insertion and construction of maps and sets from a
pair of iterators only requires that the iterator's value_type is
convertible to the container's value_type (previously it had to be the
same).
This fixes the implementation to meet that relaxed requirement, by
defining a pair of overloads that either insert or emplace, depending on
the iterator's value_type. Instead of adding yet another overload of
_M_insert_unique and _M_insert_equal, the overloads taking iterators are
renamed to _M_insert_range_unique and _M_insert_range_equal.
PR libstdc++/87194
* include/bits/stl_map.h
(map::map(initializer_list<value_type>, const Compare&, const Alloc&))
(map::map(initializer_list<value_type>, const Alloc&))
(map::map(InputIterator, InputIterator, const Alloc&))
(map::map(InputIterator, InputIterator))
(map::map(InputIterator, InputIterator, const Compare&, const Alloc&))
(map::insert(InputIterator, InputIterator)):
Call _M_insert_range_unique instead of _M_insert_unique.
* include/bits/stl_multimap.h
(multimap::multimap(initializer_list<value_type>, const C&, const A&))
(multimap::multimap(initializer_list<value_type>, const A&))
(multimap::multimap(InputIterator, InputIterator, const A&))
(multimap::multimap(InputIterator, InputIterator))
(multimap::multimap(InputIterator, InputIterator, const C&, const A&))
(multimap::insert(InputIterator, InputIterator)): Call
_M_insert_range_equal instead of _M_insert_equal.
* include/bits/stl_multiset.h
(multiset::multiset(InputIterator, InputIterator))
(multiset::multiset(InputIterator, InputIterator, const C&, const A&))
(multiset::multiset(initializer_list<value_type>, const C&, const A&))
(multiset::multiset(initializer_list<value_type>, const A&))
(multiset::multiset(InputIterator, InputIterator, const A&))
(multiset::insert(InputIterator, InputIterator)): Call
_M_insert_range_equal instead of _M_insert_equal.
* include/bits/stl_set.h
(set::set(InputIterator, InputIterator))
(set::set(InputIterator, InputIterator, const Compare&, const Alloc&))
(set::set(initializer_list<value_type>, const Compare&, const Alloc&))
(set::set(initializer_list<value_type>, const Alloc&))
(set::set(InputIterator, InputIterator, const Alloc&))
(set::insert(InputIterator, InputIterator)):
Call _M_insert_range_unique instead of _M_insert_unique.
* include/bits/stl_tree.h
[__cplusplus >= 201103L] (_Rb_tree::__same_value_type): New alias
template for SFINAE constraints.
[__cplusplus >= 201103L] (_Rb_tree::_M_insert_range_unique): Pair of
constrained overloads that either insert or emplace, depending on
iterator's value_type.
[__cplusplus >= 201103L] (_Rb_tree::_M_insert_range_equal): Likewise.
[__cplusplus < 201103L] (_Rb_tree::_M_insert_range_unique)
(_Rb_tree::_M_insert_range_equal): New functions replacing range
versions of _M_insert_unique and _M_insert_equal.
(_Rb_tree::_M_insert_unique(_InputIterator, _InputIterator))
(_Rb_tree::_M_insert_equal(_InputIterator, _InputIterator)): Remove.
* testsuite/23_containers/map/modifiers/insert/87194.cc: New test.
* testsuite/23_containers/multimap/modifiers/insert/87194.cc: New test.
* testsuite/23_containers/multiset/modifiers/insert/87194.cc: New test.
* testsuite/23_containers/set/modifiers/insert/87194.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/23_containers/map/modifiers/insert/87194.cc
trunk/libstdc++-v3/testsuite/23_containers/multimap/modifiers/insert/87194.cc
trunk/libstdc++-v3/testsuite/23_containers/multiset/modifiers/insert/87194.cc
trunk/libstdc++-v3/testsuite/23_containers/set/modifiers/insert/87194.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_map.h
trunk/libstdc++-v3/include/bits/stl_multimap.h
trunk/libstdc++-v3/include/bits/stl_multiset.h
trunk/libstdc++-v3/include/bits/stl_set.h
trunk/libstdc++-v3/include/bits/stl_tree.h
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Subject: [Bug libstdc++/78595] Unnecessary copies in _Rb_tree
Date: Mon, 03 Sep 2018 14:28:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk.
This is probably safe to backport, but I'll wait a while.
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Subject: [Bug tree-optimization/87200] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3629
Date: Mon, 03 Sep 2018 14:29:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 3 14:29:00 2018
New Revision: 264062
URL: https://gcc.gnu.org/viewcvs?rev=264062&root=gcc&view=rev
Log:
2018-09-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/87200
* tree-ssa-sccvn.c (vn_nary_build_or_lookup_1): Valueize a
simplify result.
* gcc.dg/torture/pr87200.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87200.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87200] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3629
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This should be fixed at r264063, please reopen if not (or if you want it
backported).
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Subject: [Bug libstdc++/78179] FAIL: 26_numerics/headers/cmath/hypot.cc execution test
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Sep 3 14:54:28 2018
New Revision: 264063
URL: https://gcc.gnu.org/viewcvs?rev=264063&root=gcc&view=rev
Log:
PR libstdc++/78179 run long double tests separately
Split the long double testing into a separate file, so that we can XFAIL
targets where the long double precision doesn't meet the expected
tolerances. The float and double tests are still expefted to PASS for
all targets.
PR libstdc++/78179
* testsuite/26_numerics/headers/cmath/hypot-long-double.cc: New test
that runs the long double part of hypot.cc.
* testsuite/26_numerics/headers/cmath/hypot.cc: Disable long double
tests unless TEST_HYPOT_LONG_DOUBLE is defined.
Added:
trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot-long-double.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/hypot.cc
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Subject: [Bug libstdc++/87194] Associative container cannot be inserted from move iterators that refer to elements implicitly convertible to value_type
Date: Mon, 03 Sep 2018 14:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for GCC 9.
>From gcc-bugs-return-614517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 14:58:00 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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----------------------------------------------------------------------------
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Last reconfirmed|2018-08-16 00:00:00 |2018-09-03
Ever confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Could this be due to using alloca? The tests should not require a huge stack,
so either alloca isn't usable or maybe there's a bug causing an infinite
recursion.
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #18 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #17)
> (In reply to Jakub Jelinek from comment #16)
> > For unsigned x % y == z if y is odd constant we can handle it for any
> > constant z, by computing m = mul_inv (y, 2^prec) and d = (2^prec / y) and
> > using x * m - (z * m) < d .
>
> Is that preferable to testing (x - z) % y == 0? Why?
That would require checking that it when x - z underflows if returns the
correct answer (or adding a && x >= z).
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 15:03:00 -0000
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--- Comment #4 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
(In reply to Jakub Jelinek from comment #3)
> This is a glibc bug
I (obviously) disagree.
, coming up with a set of weakref checks for gthr.h that
> would satisfy static linking of glibc and all possible combinations of
> included vs. non-included objects is impossible.
If you call pthread_mutex_lock (or any other function) via weakref, then you
should ensure that the function is actually available.
AFAICT, libgcc only calls a few pthread_* functions. Why is it hard to check
that *all* of them are present?
> E.g. Fedora/RHEL ld -r libpthread.a objects into a single exactly because of this.
That is a workaround, not a fix. And it has significant negative effects in the
resulting program code size.
> There are many dups of this both on the gcc side and glibc side.
Well, I think GCC and GLIBC developers need to sit down and decide whose bug it
is, and fix it once and for all :-)
>From gcc-bugs-return-614520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:06:44 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 15:06:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Paul Pluzhnikov from comment #4)
> (In reply to Jakub Jelinek from comment #3)
> > This is a glibc bug
>
> I (obviously) disagree.
>
> , coming up with a set of weakref checks for gthr.h that
> > would satisfy static linking of glibc and all possible combinations of
> > included vs. non-included objects is impossible.
>
> If you call pthread_mutex_lock (or any other function) via weakref, then you
> should ensure that the function is actually available.
>
> AFAICT, libgcc only calls a few pthread_* functions. Why is it hard to check
> that *all* of them are present?
Because it is very expensive. Each of those tests requires a dynamic
relocation, GOT read every time it is checked, bloats the code size, etc.
>From gcc-bugs-return-614521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:09:52 2018
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From: "webrown.cpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87193] symbols in <version> have inconsistent types
Date: Mon, 03 Sep 2018 15:09:00 -0000
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--- Comment #3 from W E Brown <webrown.cpp at gmail dot com> ---
Sorry; hadn't seen or recalled the note cited by comment 1.
Agreed with comment 2 that this need not be a priority. My (admittedly
hostile) experimental code caught it, so I thought to note it for the record.
Thanks for confirming.
>From gcc-bugs-return-614522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:21:32 2018
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From: "ppluzhnikov at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 15:21:00 -0000
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--- Comment #6 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
(In reply to Jakub Jelinek from comment #5)
> Because it is very expensive.
One impractical solution is to require '-pthread' on the compile and link line,
and link a libgcc_mt that has non-weak references to pthread_* functions.
This will force end users to finally build their programs with correct command
line :-)
>From gcc-bugs-return-614523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:23:59 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 15:23:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
gthr.h is used heavily e.g. in libstdc++, so your solution doesn't really work
at all.
>From gcc-bugs-return-614524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:35:28 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/77691] [7/8/9 regression] experimental/memory_resource/resource_adaptor.cc FAILs
Date: Mon, 03 Sep 2018 15:35:00 -0000
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--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this would make the tests pass, so you could remove the xfail
directives:
--- a/libstdc++-v3/include/experimental/memory_resource
+++ b/libstdc++-v3/include/experimental/memory_resource
@@ -421,7 +421,11 @@ namespace pmr {
do_allocate(size_t __bytes, size_t __alignment) override
{
if (__alignment <= __guaranteed_alignment<_Alloc>::value)
- return _M_alloc.allocate(__bytes);
+ {
+ if (__bytes < __alignment)
+ __bytes = __alignment;
+ return _M_alloc.allocate(__bytes);
+ }
const _AlignMgr __mgr(__bytes, __alignment);
// Assume _M_alloc returns 1-byte aligned memory, so allocate enough
@@ -437,6 +441,8 @@ namespace pmr {
auto __ptr = static_cast<char*>(__p);
if (__alignment <= __guaranteed_alignment<_Alloc>::value)
{
+ if (__bytes < __alignment)
+ __bytes = __alignment;
_M_alloc.deallocate(__ptr, __bytes);
return;
}
>From gcc-bugs-return-614525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:42:52 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
Date: Mon, 03 Sep 2018 15:42:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Host libbacktrace would need to use GCC's host zlib and target
libbacktrace would need to use GCC's target zlib for the same target
multilib (which would require appropriate dependencies to be added to
cause a target zlib to be built; I think it used to be built for GCJ, but
I don't see any current dependencies that would result in it being built).
>From gcc-bugs-return-614526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:44:30 2018
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From: "bugdal at aerifal dot cx" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/87191] UBSan doesn't catch invalid pointer arithmetic outside known object bounds
Date: Mon, 03 Sep 2018 15:44:00 -0000
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--- Comment #4 from Rich Felker <bugdal at aerifal dot cx> ---
Regarding ASan, absolutely, but this is a case that can be caught without heavy
memory tracking machinery, and that seems to be documented as being caught by
-fsanitize=object-size but isn't.
In my particular case, the bug I hoped it would have caught but didn't was in
musl libc, and I don't even have San runtime libraries that are musl
compatible, much less the framework to run ASan *under* libc, which is very
complex to get right.
>From gcc-bugs-return-614527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 15:59:54 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libquadmath/87204] strtoflt128 produces different results for subnormals with -m32 and -m64
Date: Mon, 03 Sep 2018 15:59:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
There are lots of glibc strtod fixes that postdate the last merges of
strtod code to libquadmath. I don't know if any of them are relevant to
this issue, but merging in those fixes would seem a good idea before
investigating this issue further.
>From gcc-bugs-return-614528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:03:24 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Mon, 03 Sep 2018 16:03:00 -0000
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--- Comment #4 from dave.anglin at bell dot net ---
On 2018-09-03 10:57 AM, redi at gcc dot gnu.org wrote:
> Could this be due to using alloca? The tests should not require a huge stack,
> so either alloca isn't usable or maybe there's a bug causing an infinite
> recursion.
(gdb) r
Starting program:
/mnt/gnu/gcc/objdir-test/hppa64-hp-hpux11.11/libstdc++-v3/testsuite/14220.exe
warning: Private mapping of shared library text was not specified
by the executable; setting a breakpoint in a shared library which
is not privately mapped will not work. See the HP-UX 11i v3 chatr
manpage for methods to privately map shared library text.
Pid 2143 received a SIGSEGV for stack growth failure.
Possible causes: insufficient memory or swap space,
or stack size exceeded maxssiz.
Program received signal SIGSEGV, Segmentation fault.
0xc000000000270de8 in memmove () from /lib/pa20_64/libc.2
(gdb) bt
#0Â 0xc000000000270de8 in memmove () from /lib/pa20_64/libc.2
#1Â 0xc0000000005bba38 in std::ctype<char>::do_widen (
   __to=0x800003fffdff0dd0 <crc_table+120> "1.", '0' <repeats 42 times>,
   __hi=0x800003fffdff0d9f <crc_table+71> "",
   __lo=0x800003fffdff0da0 <crc_table+72> "1.", '0' <repeats 42 times>,
   this=<optimized out>)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.h:1107
#2Â std::ctype<char>::widen (
   __to=0x800003fffdff0dd0 <crc_table+120> "1.", '0' <repeats 42 times>,
   __hi=0x800003fffdff0d9f <crc_table+71> "",
   __lo=0x800003fffdff0da0 <crc_table+72> "1.", '0' <repeats 42 times>,
   this=<optimized out>)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.h:908
#3Â std::num_put<char, std::ostreambuf_iterator<char,
std::char_traits<char> > >::_M_insert_float<double>
(this=0x800003fffdfe57a0, __s=..., __io=...,
   __fill=43 '+', __mod=<optimized out>, __v=1)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.tcc:1048
#4Â 0xc0000000005bbe68 in std::num_put<char,
std::ostreambuf_iterator<char, std::char_traits<char> > >::do_put
(this=<optimized out>,
   __s=<error reading variable: Cannot access memory at address 0x10>,
---Type <return> to continue, or q <return> to quit---
   __io=..., __fill=<optimized out>, __v=<optimized out>)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.tcc:1157
#5Â 0x4000000000003794 in std::num_put<char,
std::ostreambuf_iterator<char, std::char_traits<char> > >::put (__v=1,
__fill=43 '+', __io=..., __s=...,
   this=0x800003fffdfe57a0)
   at
/mnt/gnu/gcc/gcc/libstdc++-v3/testsuite/22_locale/num_put/put/char/14220.cc:38
#6Â test01 ()
   at
/mnt/gnu/gcc/gcc/libstdc++-v3/testsuite/22_locale/num_put/put/char/14220.cc:38
#7Â 0x4000000000003a74 in main ()
   at
/mnt/gnu/gcc/gcc/libstdc++-v3/testsuite/22_locale/num_put/put/char/14220.cc:45
On the failing call to memmove, we have the following arguments:
(gdb) p/x $r26
$1 = 0x800003fffdff0dd0
(gdb) p/x $r25
$2 = 0x800003fffdff0da0
(gdb) p/x $r24
$3 = 0xffffffffffffffff
(gdb) frame 1
#1Â 0x800003fffdfa0a38 in std::ctype<char>::do_widen (
   __to=0x800003fffdff0dd0 <crc_table+120> "\200",
   __hi=0x800003fffdff0d9f <crc_table+71> "",
   __lo=0x800003fffdff0da0 <crc_table+72> "1.", '0' <repeats 42 times>,
   this=<optimized out>)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.h:1107
1107Â Â Â Â Â Â Â Â Â Â Â __builtin_memcpy(__to, __lo, __hi - __lo);
(gdb) p __hi
$4 = 0x800003fffdff0d9f <crc_table+71> ""
(gdb) p __lo
$5 = 0x800003fffdff0da0 <crc_table+72> "1.", '0' <repeats 42 times>
(gdb) p/x __hi - __lo
$6 = 0xffffffffffffffff
>From gcc-bugs-return-614529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:06:05 2018
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 16:06:00 -0000
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--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
Here is a very old proposal:
https://groups.google.com/forum/#!msg/generic-abi/K1lUiNsmM6c/Pl9-7ngPVXIJ
I am not sure if it will completely fix:
https://sourceware.org/bugzilla/show_bug.cgi?id=5784
>From gcc-bugs-return-614530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:16:23 2018
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From: "iii at linux dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87206] New: Suboptimal code generation for __atomic_compare_exchange_n followed by a comparison
Date: Mon, 03 Sep 2018 16:16:00 -0000
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Bug ID: 87206
Summary: Suboptimal code generation for
__atomic_compare_exchange_n followed by a comparison
Product: gcc
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I tried to build the example #5 from
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80080 on x86_64 and observed a
similar issue:
$ cat 1.c
extern void bar (int *);
void foo5(int *mem)
{
int oldval = 0;
__atomic_compare_exchange_n (mem, (void *) &oldval, 1,
1, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
if (oldval != 0)
bar (mem);
}
$ gcc-8 -c 1.c -O3 -g
$ objdump -d 1.o
# skip
0000000000000000 <_foo5>:
0: 31 c0 xor %eax,%eax
2: ba 01 00 00 00 mov $0x1,%edx
7: f0 0f b1 17 lock cmpxchg %edx,(%rdi)
b: 85 c0 test %eax,%eax
d: 75 01 jne 10 <_foo5+0x10>
f: c3 retq
10: e9 00 00 00 00 jmpq 15 <_foo5+0x15>
We don't have to do "test %eax,%eax", because this information is already
available through ZF, which is set by CMPXCHG.
I wonder if it would be possible to come up with a common solution for all
architectures, including x86_64 and s390?
>From gcc-bugs-return-614531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:26:09 2018
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Subject: [Bug other/77609] __attribute__((section(".note.foo"))) forces SHT_PROGBITS though the assembler would use SHT_NOTE
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--- Comment #7 from Gabriel Rauter <rauter.gabriel at gmail dot com> ---
(In reply to Gabriel Rauter from comment #6)
> This change breaks the .noinit section on avr which now gets set to PROGBTIS
> because the section type is omitted. It should be NOBITS.
.noinit regression fixed in binutils
https://sourceware.org/bugzilla/show_bug.cgi?id=23570
>From gcc-bugs-return-614532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:26:34 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #5 from dave.anglin at bell dot net ---
On 2018-09-03 12:03 PM, dave.anglin at bell dot net wrote:
> (gdb) p/x __hi - __lo
> $6 = 0xffffffffffffffff
(gdb) frame 3
#3Â std::num_put<char, std::ostreambuf_iterator<char,
std::char_traits<char> > >::_M_insert_float<double>
(this=0x800003fffdde37a0, __s=..., __io=...,
   __fill=43 '+', __mod=<optimized out>, __v=1)
   at
/mnt/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/bits/locale_facets.tcc:1048
1048Â Â Â Â Â Â Â Â Â Â Â __ctype.widen(__cs, __cs + __len, __ws);
(gdb) p __len
$9 = -1
>From gcc-bugs-return-614533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:27:40 2018
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Subject: [Bug c++/85137] [concepts] ICE with undeclared concept
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-03
CC| |paolo.carlini at oracle dot com
Ever confirmed|0 |1
>From gcc-bugs-return-614534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:29:07 2018
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Subject: [Bug c++/85065] [concepts] ICE with invalid use of a concept
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85065
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-03
Ever confirmed|0 |1
>From gcc-bugs-return-614535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:37:26 2018
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Subject: [Bug libgcc/87189] libgcc/gthr-posix.h (__gthread_active_p) makes unwarranted assumptions about libpthread.a
Date: Mon, 03 Sep 2018 16:37:00 -0000
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--- Comment #9 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Thanks, H.J.
https://sourceware.org/bugzilla/show_bug.cgi?id=5784 has a few references, and
in particular https://sourceware.org/ml/libc-alpha/2012-09/msg00192.html is
important to consider.
>From gcc-bugs-return-614536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:50:23 2018
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From: "blastrock at free dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87207] New: ODR issue with static functions and lambda templates
Date: Mon, 03 Sep 2018 16:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87207
Bug ID: 87207
Summary: ODR issue with static functions and lambda templates
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44652
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44652&action=edit
Small reproduction test case
I have a library that instantiates a chain of class templates and lambda
templates. I have two files with a static function that has the same name, but
by being static they should not interfere with each other.
It seems that gcc generates and exports a symbol depending on this static
function, and the linker only keeps one instance of it, making the other
instantiation wrong.
I have prepared a small reproduction test case. The String class is initialized
to 0 and asserts that it still contains 0 in its destructor. Moreover, it
prints the addresses where it is constructed and destroyed.
When compiling this project with any GCC version from Ubuntu (tested on Ubuntu
18.04, with GCC 6, 7 and 8), it will crash. I couldn't reproduce the issue on
Debian. I tried adding the stack-protector and fortify flags that are enabled
by default on Ubuntu but couldn't reproduce the bug on Debian.
The output is:
new 0x7ffcb217a6a8
new 0x7ffcb217a648
delete 0x7ffcb217a660
terminate called after throwing an instance of 'int'
Aborted (core dumped)
Removing the `async_resumable` instantiation from bunny.cpp (which is code that
is never called) will make main.cpp work.
The test case is attached.
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Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
Date: Mon, 03 Sep 2018 16:51:00 -0000
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--- Comment #1 from blastrock at free dot fr ---
Created attachment 44653
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44653&action=edit
output of gcc -v when compiling the test case
>From gcc-bugs-return-614538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:55:32 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Mon, 03 Sep 2018 16:55:00 -0000
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--- Comment #3 from dave.anglin at bell dot net ---
It looks like the function pointers disappear in the esra pass.
>From gcc-bugs-return-614539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 16:55:32 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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--- Comment #4 from dave.anglin at bell dot net ---
Created attachment 44655
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44655&action=edit
S.cpp.035t.esra
>From gcc-bugs-return-614540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 17:14:31 2018
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
Date: Mon, 03 Sep 2018 17:14:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ian at airs dot com
--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
Note that zlib is only used for the test programs, not for libbacktrace itself.
Are you sure that libgfortran is picking up a dependency on zlib? If that is
coming from libbacktrace, then something else is going wrong.
>From gcc-bugs-return-614541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 17:23:06 2018
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From: "SztfG at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87208] New: dependent name resolution selects a function it should have NEVER considered
Date: Mon, 03 Sep 2018 17:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87208
Bug ID: 87208
Summary: dependent name resolution selects a function it should
have NEVER considered
Product: gcc
Version: unknown
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[temp.dep.res]/1: In resolving dependent names, names from the following
sources are considered:
— Declarations that are visible at the point of definition of the template.
— Declarations from namespaces associated with the types of the function
arguments both from the instantiation context and from the definition context.
In the code below, g++ selects the free operator<<(), even though it is
declared after the definition of the template and can't be found using ADL.
#include <cstdio>
struct S {
template <typename T>
void operator<<(T) { std::printf("DEFAULT\n"); }
};
namespace N {
template <typename T>
void run(const T & value) { S s; s << value; }
}
struct MyValue {};
namespace N {
void operator<<(S&, MyValue) { std::printf("OVERLOADED\n"); }
}
int main(int, char**)
{
N::run(MyValue());
}
Expected output: DEFAULT
Actual output: OVERLOADED
>From gcc-bugs-return-614542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 17:31:23 2018
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From: "vigerske at math dot hu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
Date: Mon, 03 Sep 2018 17:31:00 -0000
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--- Comment #5 from Stefan Vigerske <vigerske at math dot hu-berlin.de> ---
The AC_CHECK_LIB([z], [compress], []) adds -lz to the LIBS variable in the
Makefile, if successful. This results in calling the libtool that builds
libbacktrace.la with -lz, which then results in having dependency_libs=' -lz'
in libbacktrace.la. The build of libgfortran(.so) picks this up, so that the
systems libz.so ends up as dependency of libgfortran.so.
If libbacktrace itself does not require zlib, then maybe -lz should not end up
in LIBS. I don't know what the preferred way to handle this is. One way is to
save LIBS before calling AC_CHECK_LIB and to restore it again afterwards.
However, the test executable would still need -lz.
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Subject: [Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 3 17:41:05 2018
New Revision: 264069
URL: https://gcc.gnu.org/viewcvs?rev=264069&root=gcc&view=rev
Log:
2018-09-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/87177
* tree-ssa-sccvn.c (vuse_ssa_val): Revert previous change, keep
cleanup.
* gcc.dg/torture/pr87177.c: New testcase.
* gcc.dg/torture/pr87177-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87177-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr87177.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu
Date: Mon, 03 Sep 2018 17:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 18:04:00 -0000
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44656
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44656&action=edit
gcc9-pr82853-wip.patch
Untested WIP patch which does this during expansion if it is cheaper according
to target costs.
As the FIXMEs say, I'm not yet trying Alex' proposal with doing the subtraction
on X (can't be used unconditionally, need to prove that values from -C2 to -1
u% C1 aren't 0), and am not trying even C1 when rotates aren't available
(either could just expand the rotate anyway using 2 shifts + or, or comparison
+ mask + comparison + bitwise and (though that would complicate the callers
equite a bit).
>From gcc-bugs-return-614546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 18:05:08 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 18:05:00 -0000
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testcase I've been eyeballing so far:
unsigned f1 (unsigned x) { return (x % 679U) == 0; }
unsigned f2 (unsigned x, unsigned *y) { *y = x / 679U; return (x % 679U) == 0;
}
unsigned f3 (unsigned x) { return (x % 1738U) == 0; }
void bar (void);
void f4 (unsigned x) { if (x % 3 == 0) bar (); }
void f5 (unsigned x) { if (x % 3 == 1) bar (); }
void f6 (unsigned x) { if (x % 3 == 2) bar (); }
>From gcc-bugs-return-614547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 18:32:38 2018
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Subject: [Bug fortran/34500] Bind(C): Character returning function with ENTRY gives ICE
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G. Steinmetz <gscfq@t-online.de> changed:
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----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #5 from G. Steinmetz <gscfq@t-online.de> ---
Update :
$ cat z1.f90
function test() bind(C)
entry bar() bind(C)
end
$ gfortran-9-20180902 -c z1.f90
z1.f90:2:9-9:
2 | entry bar() bind(C)
| 1
Error: Procedure 'bar' with binding label 'bar' at (1) uses the same global
identifier as entity at (2)
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Subject: [Bug fortran/47425] Array constructor with type-spec: Fails with more complicated length type expr
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G. Steinmetz <gscfq@t-online.de> changed:
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----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #5 from G. Steinmetz <gscfq@t-online.de> ---
Starting again from a simple test file :
$ cat za.f90
program p
integer, parameter :: n = 1
print *, [character(n) :: 'a']
end
$ gfortran-9-20180902 -c za.f90 -fdump-tree-original
Modifying from a constant/parameter n to a variable n
(or an expression with a variable), and dumping again :
$ cat zb.f90
program p
integer :: n = 1
print *, [character(n) :: 'a']
end
$ gfortran-9-20180902 -c zb.f90 -fdump-tree-original
zb.f90:3:0:
3 | print *, [character(n) :: 'a']
|
Error: size of variable 'A.1' is too large
Comparing the dumps :
{
...
{
static character(kind=1)[1:1] * A.1[1] = {&"a"[1]{lb: 1 sz: 1}};
...
_gfortran_transfer_character_write (&dt_parm.0, A.1[S.2], 1);
versus :
{
static integer(kind=4) n = 1;
...
{
integer(kind=8) D.3770;
static character(kind=1) A.1[1][1:D.3770] = {"a"};
D.3770 = (integer(kind=8)) MAX_EXPR <n, 0>;
...
_gfortran_transfer_character_write (&dt_parm.0, &A.1[S.2], D.3770);
Helper variable D.3770 is used to define A.1, before being initialized.
What could be done to swap the two relevant lines ?
(pseudo code) :
integer(kind=8) D.3770;
D.3770 = (integer(kind=8)) MAX_EXPR <n, 0>;
static character(kind=1) A.1[1][1:D.3770] = {"a"};
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From: "glenjofe at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87205] Inefficient code generation for switch
Date: Mon, 03 Sep 2018 18:44:00 -0000
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Glen Joseph Fernandes <glenjofe at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Glen Joseph Fernandes <glenjofe at gmail dot com> ---
Interestingly, I observed that moving the default label first produces a better
result:
void f(int);
void h(unsigned i)
{
switch (i) {
default: __builtin_unreachable();
case 0: f(42); break;
case 1: f(42); break;
case 2: f(42); break;
case 3: f(42); break;
case 4: f(42); break;
case 5: f(42); break;
}
}
At -O2 or higher generates:
h(unsigned int):
mov edi, 42
jmp f(int)
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
Date: Mon, 03 Sep 2018 18:49:00 -0000
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--- Comment #6 from Ian Lance Taylor <ian at airs dot com> ---
In my testing I don't see any reference to -lz in libbacktrace.la.
It is not the case that using
AC_CHECK_LIB([z], [compress],
[AC_DEFINE(HAVE_ZLIB, 1, [Define if -lz is available.])])
in libbacktrace/configure.ac causes -lz to be added to LIBS. This happens
temporarily during the configure script, but the assignment to LIBS is undone.
It is not reflected in the generated Makefile.
So while I'm certainly willing to fix this, I can't recreate the problem and I
don't understand the problem. Can you explain further? Thanks.
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Subject: [Bug c++/85065] [concepts] ICE with invalid use of a concept
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-614552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:07:52 2018
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Subject: [Bug c++/87205] Inefficient code generation for switch
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take a look.
>From gcc-bugs-return-614553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:19:36 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 19:19:00 -0000
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--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Probably should punt early if integer_onep (treeop1), that case should have
been optimized earlier, but if it isn't, we shouldn't miscompile.
Another thing is if *arg1 is < 0 or >= treeop1, again, I'd hope we have
optimized that already to false (or true for NE_EXPR), but if not, we shouldn't
miscompile.
Another thing is that C4 needs to be adjusted, if *arg1 is bigger than
all_ones%treeop1, then we need to subtract 1 from C4 - e.g. for x % 3 == 0
we want to expand it as x * 0xaaaaaaab <= 0x55555555, while for x % 3 == 1
we should expand as x * 0xaaaaaaab - 1 * 0xaaaaaaab <= 0x55555555 - 1, because
0xffffffff % 3 == 0 and thus there is one more case where x % 3 == 0 compared
to x % 3 == 1 and x % 3 == 2 cases.
Hacker's Delight 10-17 mentions <= (2^prec - 1) / c1 rather than <= (2^prec) /
c1, probably should do that too.
>From gcc-bugs-return-614554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:19:40 2018
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Subject: [Bug c++/87208] dependent name resolution selects a function it should have NEVER considered
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Dup of PR 51577 ?
>From gcc-bugs-return-614555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:25:12 2018
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87209] New: Wuninitialized or Wmaybe-uninitialized doesn't warn when malloc's return value is used without being initialized
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Bug ID: 87209
Summary: Wuninitialized or Wmaybe-uninitialized doesn't warn
when malloc's return value is used without being
initialized
Product: gcc
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There's no warnings emitted for the following test-case:
int f(void)
{
int *p = __builtin_malloc (sizeof (*p));
return *p;
}
I assume this should have been diagnosed with Wuninitialized or
Wmaybe-uninitialized ?
Thanks,
Prathamesh
>From gcc-bugs-return-614556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:44:55 2018
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Subject: [Bug c/87210] New: [RFE] introduce build time options to zero initialize automatic stack variables
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Bug ID: 87210
Summary: [RFE] introduce build time options to zero initialize
automatic stack variables
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Hello,
Please see:
-> http://www.openwall.com/lists/kernel-hardening/2018/02/27/33
-> http://www.openwall.com/lists/kernel-hardening/2018/02/27/41
Some time back, a proposal to zero(0) initialize various automatic stack
variables(inc arrays/structs/etc.) inside kernel was proposed based on an
experimental glibc patch, with an intention to remove kernel information
leakage issues.
As from the reply, it would be nice to have four options/features available
from the compiler, from least to most performance impact:
- initialize padding to zero when static initializers are used (this would
make foo = { .field = something }; identical to memset(&foo, 0,
sizeof(foo)); foo.field = something for all structures, but now, any
structures with padding _must_ use the latter to be safe, which is highly
error-prone).
- initialize all uninitialized variables that contain a structure marked
with a special attribute (e.g. __attribute__((force_initialize)) ).
- initialize all uninitialized variables that are passed by reference (see
GCC_PLUGIN_STRUCTLEAK_BYREF_ALL).
- initialize all uninitialized variables (-finit-local-vars seems to do
this)
The advent of h/w vulnerabilities like Spectre and Meltdown and more recently
L1TF has not only opened a new research area but has also reiterated the
importance of initializing memory bytes with known values.
Also see:
->
https://googleprojectzero.blogspot.com/2018/06/detecting-kernel-memory-disclosure.html
Would it be possible to introduce new gcc(1) command-line options to initialize
automatic stack variables(inc arrays/structs/etc.) of a program?
Thank you.
>From gcc-bugs-return-614557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 19:50:08 2018
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Subject: [Bug c/87210] [RFE] introduce build time options to zero initialize automatic stack variables
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
http://wiki.c2.com/?TheKenThompsonHack
>From gcc-bugs-return-614558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 20:32:12 2018
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Subject: [Bug c/87210] [RFE] introduce build time options to zero initialize automatic stack variables
Date: Mon, 03 Sep 2018 20:32:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Mon, 3 Sep 2018, pjp at fedoraproject dot org wrote:
> As from the reply, it would be nice to have four options/features available
> from the compiler, from least to most performance impact:
>
> - initialize padding to zero when static initializers are used (this would
> make foo = { .field = something }; identical to memset(&foo, 0,
> sizeof(foo)); foo.field = something for all structures, but now, any
> structures with padding _must_ use the latter to be safe, which is highly
> error-prone).
Presumably that sort of thing would need to come with a guarantee that
SRA, structure assignment etc. preserve padding (rather than padding
contents potentially being lost if a structure is subject to SRA)?
(Both are effectively treating padding like additional named fields for
the purposes of code generation but without affecting what fields the
front end associates initializers with. I'd expect the performance costs
of such guarantees associated with padding to be small.)
>From gcc-bugs-return-614559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 20:37:15 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 20:37:00 -0000
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--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, while it isn't correct to replace x % 3U == 1 by (x - 1) % 3U == 0, because
for x == 0 the test will yield a different value, as 0xffffffffU % 3U is 0 and
0 % 3U is also 0, x % 3U == 1 is equivalent to (x - 1) * 0xaaaaaaabU <=
0x55555554U, but x % 3U == 0 is equivalent to x * 0xaaaaaaabU <= 0x55555555U.
Now to see if something useful can be used also for the even divisors.
>From gcc-bugs-return-614560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 20:52:19 2018
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 20:52:00 -0000
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Wilco <wdijkstr at arm dot com> changed:
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----------------------------------------------------------------------------
CC| |wdijkstr at arm dot com
--- Comment #23 from Wilco <wdijkstr at arm dot com> ---
(In reply to Jakub Jelinek from comment #22)
> So, while it isn't correct to replace x % 3U == 1 by (x - 1) % 3U == 0,
> because
> for x == 0 the test will yield a different value, as 0xffffffffU % 3U is 0
> and
> 0 % 3U is also 0, x % 3U == 1 is equivalent to (x - 1) * 0xaaaaaaabU <=
> 0x55555554U, but x % 3U == 0 is equivalent to x * 0xaaaaaaabU <= 0x55555555U.
> Now to see if something useful can be used also for the even divisors.
Yes for this case it is safe to do (x - 1) * 0xaaaaaaab < 0x55555555, but you
can also do x * 0xaaaaaaab >= 0xaaaaaaab which is even simpler. Basically (x %
C) == N is simpler for 2 values of N.
>From gcc-bugs-return-614561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 03 20:58:54 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Mon, 03 Sep 2018 20:58:00 -0000
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Wilco from comment #23)
> (In reply to Jakub Jelinek from comment #22)
> > So, while it isn't correct to replace x % 3U == 1 by (x - 1) % 3U == 0,
> > because
> > for x == 0 the test will yield a different value, as 0xffffffffU % 3U is 0
> > and
> > 0 % 3U is also 0, x % 3U == 1 is equivalent to (x - 1) * 0xaaaaaaabU <=
> > 0x55555554U, but x % 3U == 0 is equivalent to x * 0xaaaaaaabU <= 0x55555555U.
> > Now to see if something useful can be used also for the even divisors.
>
> Yes for this case it is safe to do (x - 1) * 0xaaaaaaab < 0x55555555, but
> you can also do x * 0xaaaaaaab >= 0xaaaaaaab which is even simpler.
Yeah, a special case, todo++.
> Basically (x % C) == N is simpler for 2 values of N.
I meant that for C odd it works for any value, x % C == D for C odd and D <= -1
% C then (x - D) * mod_inv (C) <= -1 / C, otherwise if C is odd and D > -1 % C
then
(x - D) * mod_inv (C) < -1 / C.
Just if C is even it is more complicated.
For C positive odd and signed modulo with D == 0 it can be done easily too
(will implement tomorrow).
>From gcc-bugs-return-614562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 02:11:51 2018
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Subject: [Bug c++/81836] ill-formed qualified name not diagnosed
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-614563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 02:14:03 2018
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Subject: [Bug target/66203] aarch64-none-elf does not automatically find librdimon
Date: Tue, 04 Sep 2018 02:14:00 -0000
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> By the way I will doing some bare metal aarch64 work soon but will be using
> a different triplet for this env as it supports a few things the standard
> bare metal does not.
How soon do you mean specifically?
>From gcc-bugs-return-614564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 07:17:41 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87211] New: gcc ICE at O2: in set_ssa_val_to, at tree-ssa-sccvn.c:3628
Date: Tue, 04 Sep 2018 07:17:00 -0000
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Bug ID: 87211
Summary: gcc ICE at O2: in set_ssa_val_to, at
tree-ssa-sccvn.c:3628
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It happens after the patch in r264069.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180903 (experimental) [trunk revision 264070] (GCC)
$ gcc-trunk -O2 abc.c -c
during GIMPLE pass: cunrolli
abc.c:7:6: internal compiler error: in set_ssa_val_to, at tree-ssa-sccvn.c:3628
7 | void f() {
| ^
0x6cb479 set_ssa_val_to
../../gcc/gcc/tree-ssa-sccvn.c:3628
0xe6c8da visit_phi
../../gcc/gcc/tree-ssa-sccvn.c:4229
0xe6ce8f visit_stmt
../../gcc/gcc/tree-ssa-sccvn.c:4272
0xe6e9e8 process_bb
../../gcc/gcc/tree-ssa-sccvn.c:5890
0xe6fca9 do_rpo_vn
../../gcc/gcc/tree-ssa-sccvn.c:6421
0xe70a37 do_rpo_vn(function*, edge_def*, bitmap_head*)
../../gcc/gcc/tree-ssa-sccvn.c:6567
0xdf7de8 tree_unroll_loops_completely
../../gcc/gcc/tree-ssa-loop-ivcanon.c:1479
0xdf7fd8 execute
../../gcc/gcc/tree-ssa-loop-ivcanon.c:1655
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
int a, b;
int c(int *d, int *e) {
for (; b;)
d = e;
return d;
}
void f() {
for (;;) {
int *g[1];
int h = 0;
for (; h < 3; h++)
g[0] = &a;
&a == g[0] || i(c(g, g[0]));
}
}
>From gcc-bugs-return-614565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 07:33:04 2018
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Subject: [Bug fortran/87212] New: Declaration with array constructor: Error message on valid code
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valid code
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The following is from c.l.f. Jan 26, 2018 but seems to never have been filed as
a bug report here (?), though Dominique d'Humieres presented a workaround for
the code below.
The following standard-conforming code is not parsed correctly by gfortran:
bug.f90:7:18:
7 | [(product([(j,j=1,i)]),i=0,13)]
| 1
Error: Invalid character in name at (1)
The problem dates back to at least gfortran 5.4.
program bug
use ISO_FORTRAN_ENV
implicit none
integer i
integer(INT64) j
integer(INT64), parameter :: A(0:13) = &
[(product([(j,j=1,i)]),i=0,13)]
integer(INT64) B(0:13)
B = [(product([(j,j=1,i)]),i=0,13)]
write(*,*) 'A ='
write(*,*) A
write(*,*) 'B ='
write(*,*) B
end program bug
>From gcc-bugs-return-614566-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 07:53:35 2018
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Subject: [Bug target/87213] New: ICE in final_scan_insn_1, at final.c:3070
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Bug ID: 87213
Summary: ICE in final_scan_insn_1, at final.c:3070
Product: gcc
Version: 9.0
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Host: powerpc64le-linux-gnu
Following causes ICE:
$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/ipa/pr82001.c
-mno-direct-move -O3
xgcc: warning: ‘-mno-direct-move’ is deprecated
cc1: warning: ‘-mno-direct-move’ is deprecated
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/ipa/pr82001.c: In function
‘mulhi’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/ipa/pr82001.c:19:1: error:
could not split insn
19 | }
| ^
(insn 15 10 16 (set (reg/i:DI 3 3)
(sign_extend:DI (reg:SI 32 0 [orig:124 a ] [124])))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/ipa/pr82001.c":19 38
{extendsidi2}
(expr_list:REG_DEAD (reg:SI 32 0 [orig:124 a ] [124])
(nil)))
during RTL pass: final
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/ipa/pr82001.c:19:1: internal
compiler error: in final_scan_insn_1, at final.c:3070
0x10e36a27 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0x108a0cc7 final_scan_insn_1
../../gcc/final.c:3070
0x108a1187 final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
../../gcc/final.c:3149
0x1089dd7b final_1
../../gcc/final.c:2019
0x108a547f rest_of_handle_final
../../gcc/final.c:4660
0x108a599f execute
../../gcc/final.c:4734
>From gcc-bugs-return-614567-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:23:23 2018
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From: "blastrock at free dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
Date: Tue, 04 Sep 2018 08:23:00 -0000
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--- Comment #2 from blastrock at free dot fr ---
This seems to be due to this symbol in each .o file:
0000000000000000 W
shared::shared<async_resumable<toto()::{lambda()#1}>(toto()::{lambda()#1}&&)::{lambda()#1}>(toto()::{lambda()#1})::{lambda()#1}::~shared()
It is weak and global, but I think it should be local since it depends on
toto() which is static.
>From gcc-bugs-return-614568-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:32:47 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87209] Wuninitialized or Wmaybe-uninitialized doesn't warn when malloc's return value is used without being initialized
Date: Tue, 04 Sep 2018 08:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias, missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-04
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Since we allow calloc to be declared with 'malloc' attribute the warning would
need to be special-cased on 'malloc'. Currently the warning uses the alias
machinery and that sees malloc clobber ints if not -fno-math-errno. The
machinery doesn't check whether the ref is to the memory returned by malloc.
/* If the call in statement CALL may clobber the memory reference REF
return true, otherwise return false. */
bool
call_may_clobber_ref_p_1 (gcall *call, ao_ref *ref)
{
...
/* Allocating memory does not have any side-effects apart from
being the definition point for the pointer. */
case BUILT_IN_MALLOC:
case BUILT_IN_ALIGNED_ALLOC:
case BUILT_IN_CALLOC:
case BUILT_IN_STRDUP:
case BUILT_IN_STRNDUP:
/* Unix98 specifies that errno is set on allocation failure. */
if (flag_errno_math
&& targetm.ref_may_alias_errno (ref))
return true;
return false;
note that -fno-math-errno doesn't fix it which is because of
/* Do not warn if it can be initialized outside this function.
If we did not reach function entry then we found killing
clobbers on all paths to entry. */
if (fentry_reached
/* ??? We'd like to use ref_may_alias_global_p but that
excludes global readonly memory and thus we get bougs
warnings from p = cond ? "a" : "b" for example. */
&& (!VAR_P (base)
|| is_global_var (base)))
continue;
so we do not handle uninit reads from pointer refs in this case.
>From gcc-bugs-return-614569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:34:16 2018
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Subject: [Bug tree-optimization/87211] [9 Regression] gcc ICE at O2: in set_ssa_val_to, at tree-ssa-sccvn.c:3628
Date: Tue, 04 Sep 2018 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-04
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|gcc ICE at O2: in |[9 Regression] gcc ICE at
|set_ssa_val_to, at |O2: in set_ssa_val_to, at
|tree-ssa-sccvn.c:3628 |tree-ssa-sccvn.c:3628
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-614570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:34:50 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
Date: Tue, 04 Sep 2018 08:34:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I can reproduce it with FSF GCC 7.3 and FSF GCC 8.1 but not with FSF GCC 8.2 so
it might be a duplicate of another bug that got fixed.
>From gcc-bugs-return-614571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:40:51 2018
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Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|8.0 |7.2.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Version field updated because the gcc -v output shows you're using 7.2.0 not
8.0
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Subject: [Bug c++/85646] [7/8/9 Regression] Incorrect lambda visibility with -fvisibility=hidden
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |blastrock at free dot fr
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 87207 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:47:02 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
Date: Tue, 04 Sep 2018 08:47:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk by r260017 so this is PR 85646
*** This bug has been marked as a duplicate of bug 85646 ***
>From gcc-bugs-return-614574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 08:51:16 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Tue, 04 Sep 2018 08:51:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And the previous line an alloca call using __len:
_CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
* __len));
__ctype.widen(__cs, __cs + __len, __ws);
The code assumes __convert_from_v always returns a valid length, but it seems
to be failing and returning -1.
>From gcc-bugs-return-614575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 09:03:11 2018
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Subject: [Bug middle-end/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87162
--- Comment #4 from Wen Yang <yellowriver2010 at hotmail dot com> ---
Program received signal SIGSEGV, Segmentation fault.
0x0000000000929fa1 in calculate_dominance_info (dir=CDI_DOMINATORS) at
../../gcc-6.2.0/gcc/dominance.c:633
633 if (dom_computed[dir_index] == DOM_OK)
Missing separate debuginfos, use: debuginfo-install glibc-2.17-196.el7.x86_64
gmp-6.0.0-15.el7.x86_64 libmpc-1.0.1-3.el7.x86_64 mpfr-3.1.1-4.el7.x86_64
zlib-1.2.7-17.el7.x86_64
(gdb) bt
#0 0x0000000000929fa1 in calculate_dominance_info (dir=CDI_DOMINATORS) at
../../gcc-6.2.0/gcc/dominance.c:633
#1 0x0000000000d62673 in gate_tm_init () at
../../gcc-6.2.0/gcc/trans-mem.c:2100
#2 0x0000000000d6289b in (anonymous namespace)::pass_tm_init::gate
(this=0x2434380) at ../../gcc-6.2.0/gcc/trans-mem.c:2156
#3 0x0000000000c44738 in dump_one_pass (pass=0x2434380, pass_indent=1) at
../../gcc-6.2.0/gcc/passes.c:908
#4 0x0000000000c4483e in dump_pass_list (pass=0x2434380, indent=1) at
../../gcc-6.2.0/gcc/passes.c:930
#5 0x0000000000c44915 in gcc::pass_manager::dump_passes (this=0x242e580) at
../../gcc-6.2.0/gcc/passes.c:956
#6 0x0000000000c4488f in dump_passes () at ../../gcc-6.2.0/gcc/passes.c:942
#7 0x00000000008eaa25 in symbol_table::finalize_compilation_unit
(this=0x7ffff04ed0a8) at ../../gcc-6.2.0/gcc/cgraphunit.c:2538
#8 0x0000000000d58f45 in compile_file () at ../../gcc-6.2.0/gcc/toplev.c:488
#9 0x0000000000d5b3ee in do_compile () at ../../gcc-6.2.0/gcc/toplev.c:1986
#10 0x0000000000d5b678 in toplev::main (this=0x7fffffffa7a0, argc=585,
argv=0x7fffffffa8a8) at ../../gcc-6.2.0/gcc/toplev.c:2094
#11 0x000000000167e46e in main (argc=585, argv=0x7fffffffa8a8) at
../../gcc-6.2.0/gcc/main.c:39
(gdb) p dir_index
$1 = 0
(gdb) l
628 void
629 calculate_dominance_info (cdi_direction dir)
630 {
631 unsigned int dir_index = dom_convert_dir_to_idx (dir);
632
633 if (dom_computed[dir_index] == DOM_OK)
634 {
635 checking_verify_dominators (dir);
636 return;
637 }
#define dom_computed (cfun->cfg->x_dom_computed)
(gdb) disassemble calculate_dominance_info
Dump of assembler code for function calculate_dominance_info(cdi_direction):
0x0000000000929f6e <+0>: push %rbp
0x0000000000929f6f <+1>: mov %rsp,%rbp
0x0000000000929f72 <+4>: sub $0xc0,%rsp
0x0000000000929f79 <+11>: mov %edi,-0xb4(%rbp)
0x0000000000929f7f <+17>: mov -0xb4(%rbp),%eax
0x0000000000929f85 <+23>: mov %eax,%edi
0x0000000000929f87 <+25>: callq 0x928e19
<dom_convert_dir_to_idx(cdi_direction)>
0x0000000000929f8c <+30>: mov %eax,-0xc(%rbp)
0x0000000000929f8f <+33>: mov 0x19bd1a2(%rip),%rax # 0x22e7138
<cfun>
0x0000000000929f96 <+40>: mov 0x8(%rax),%rax
0x0000000000929f9a <+44>: mov -0xc(%rbp),%edx
0x0000000000929f9d <+47>: add $0xc,%rdx
0x0000000000929fa1 <+51>: mov 0x4(%rax,%rdx,4),%eax
0x0000000000929fa5 <+55>: cmp $0x2,%eax
0x0000000000929fa8 <+58>: jne 0x929fbc
<calculate_dominance_info(cdi_direction)+78>
......
(gdb) p *(struct function *) 0x22e7138
$3 = {eh = 0x7fffd16e83f0, cfg = 0x0, gimple_body = 0x0, gimple_df = 0x49,
x_current_loops = 0x0, su = 0x0, value_histograms = 0x0, decl = 0x0,
static_chain_decl = 0x0,
nonlocal_goto_save_area = 0x0, local_decls = 0x0, cilk_frame_decl =
0x100000000, machine = 0x24230c0, language = 0x0, used_types_hash = 0x0, fde =
0x0, last_stmt_uid = 0,
funcdef_no = 0, function_start_locus = 0, function_end_locus = 0,
curr_properties = 0, last_verified = 0, cannot_be_copied_reason = 0x0,
last_clique = 0,
va_list_gpr_size = 0, va_list_fpr_size = 0, calls_setjmp = 0, calls_alloca =
0, is_cilk_function = 0, calls_cilk_spawn = 0, has_nonlocal_label = 0,
has_forced_label_in_static = 0, cannot_be_copied_set = 0, stdarg = 0,
after_inlining = 0, always_inline_functions_inlined = 0,
can_throw_non_call_exceptions = 0,
can_delete_dead_exceptions = 0, returns_struct = 0, returns_pcc_struct = 0,
has_local_explicit_reg_vars = 0, is_thunk = 0, has_force_vectorize_loops = 0,
has_simduid_loops = 0, tail_call_marked = 0}
>From gcc-bugs-return-614576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 09:04:22 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I assume the implementation in libstdc++-v3/config/locale/generic/c_locale.h is
used for HPUX, so one of these is returning an error, which we then use as
__len:
#if _GLIBCXX_USE_C99_STDIO
const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
#else
const int __ret = __builtin_vsprintf(__out, __fmt, __args);
#endif
>From gcc-bugs-return-614577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 09:09:42 2018
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Subject: [Bug fortran/87212] Declaration with array constructor: Error message on valid code
Date: Tue, 04 Sep 2018 09:09:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-04
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The following is from c.l.f. Jan 26, 2018 but seems to never have been
> filed as a bug report here (?), though Dominique d'Humieres presented
> a workaround for the code below.
Confirmed from 4.8 up to trunk (9.0). The workaround is to replace
[(product([(j,j=1,i)]),i=0,13)]
with
product(reshape([([(j,j=1,i),(1_INT64,j=i+1,13)],i=0,13)],[13,14]),
dim=1)
>From gcc-bugs-return-614578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 09:26:07 2018
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Subject: [Bug libbacktrace/87182] libbacktrace does not use GCC own zlib
Date: Tue, 04 Sep 2018 09:26:00 -0000
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Stefan Vigerske <vigerske at math dot hu-berlin.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Stefan Vigerske <vigerske at math dot hu-berlin.de> ---
Hmm, I think you are right!
With GCC 8.2.0, which I'm using, there still was AC_CHECK_LIB([z], [compress],
[]). The empty [] in the third argument does not seem to have the desired
effect of suppressing the addition of -lz to LIBS. It is still there:
https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/configure?revision=259610&view=markup#l12945
With revision 263320 from August 5, the third argument of AC_CHECK_LIB is
nontrivial and then -lz is not appended to LIBS anymore:
https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/configure?r1=259610&r2=263320
Sorry, I didn't realize this behavior of AC_CHECK_LIBS, but the documentation
also says clearly that augmenting LIBS is only the default behavior if not
overwritten.
Then everything should be fine with the next GCC release.
>From gcc-bugs-return-614579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 10:33:41 2018
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Subject: [Bug middle-end/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
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--- Comment #5 from Wen Yang <yellowriver2010 at hotmail dot com> ---
(gdb) p *(opt_pass *) 0x2434380
$4 = {<pass_data> = {type = GIMPLE_PASS, name = 0x18530f0 "*tminit",
optinfo_flags = 0, tv_id = TV_TRANS_MEM, properties_required = 40,
properties_provided = 0,
properties_destroyed = 0, todo_flags_start = 524288, todo_flags_finish =
0}, _vptr.opt_pass = 0x1853508 <vtable for (anonymous
namespace)::pass_tm_init+16>,
sub = 0x24343e0, next = 0x2434500, static_pass_number = -1,
graph_dump_initialized = false, m_ctxt = 0x240b3d0}
(gdb) p cfun
$5 = (function *) 0x7fffd16e83f0
(gdb) p *cfun
$6 = {eh = 0x7fffd12e8030, cfg = 0x0, gimple_body = 0x0, gimple_df = 0x0,
x_current_loops = 0x0, su = 0x0, value_histograms = 0x0, decl = 0x7fffd24e8e00,
static_chain_decl = 0x0, nonlocal_goto_save_area = 0x0, local_decls = 0x0,
cilk_frame_decl = 0x0, machine = 0x7fffd36e88c0, language = 0x0,
used_types_hash = 0x0,
fde = 0x0, last_stmt_uid = 0, funcdef_no = 72, function_start_locus = 0,
function_end_locus = 0, curr_properties = 0, last_verified = 0,
cannot_be_copied_reason = 0x0,
last_clique = 0, va_list_gpr_size = 255, va_list_fpr_size = 255, calls_setjmp
= 0, calls_alloca = 0, is_cilk_function = 0, calls_cilk_spawn = 0,
has_nonlocal_label = 0,
has_forced_label_in_static = 0, cannot_be_copied_set = 0, stdarg = 0,
after_inlining = 0, always_inline_functions_inlined = 0,
can_throw_non_call_exceptions = 0,
can_delete_dead_exceptions = 0, returns_struct = 0, returns_pcc_struct = 0,
has_local_explicit_reg_vars = 0, is_thunk = 0, has_force_vectorize_loops = 0,
has_simduid_loops = 0, tail_call_marked = 0}
cfun->cfg is NULL.
>From gcc-bugs-return-614580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 10:39:26 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Could you see what this prints on the target please?
#include <cerrno>
int
getlen(char* __out, int __size __attribute__((unused)), const char* __fmt, ...)
{
__builtin_va_list __args;
__builtin_va_start(__args, __fmt);
#if _GLIBCXX_USE_C99_STDIO
__builtin_puts("using vsnprintf");
const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
#else
__builtin_puts("using vsprintf");
const int __ret = __builtin_vsprintf(__out, __fmt, __args);
#endif
return __ret;
}
int main()
{
char out[64];
errno = 0;
int len = getlen(out, 0, "%.*g", 6, 1.99);
__builtin_printf("returned %d, errno = %d\n", len, errno);
}
>From gcc-bugs-return-614581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 10:59:49 2018
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Subject: [Bug tree-optimization/87176] [9 Regression] wrong code at -Os and above on x86-64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87176
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/87176] [9 Regression] wrong code at -Os and above on x86-64-linux-gnu
Date: Tue, 04 Sep 2018 11:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87176
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 4 10:55:46 2018
New Revision: 264077
URL: https://gcc.gnu.org/viewcvs?rev=264077&root=gcc&view=rev
Log:
2018-09-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/87176
* tree-ssa-sccvn.c (visit_phi): Remove redundant allsame
variable. When value-numbering a virtual PHI node make sure
to not value-number to the backedge value.
* gcc.dg/torture/pr87176.c: New testcase.
* gcc.dg/torture/ssa-fre-1.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87176.c
trunk/gcc/testsuite/gcc.dg/torture/ssa-fre-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #9 from dave.anglin at bell dot net ---
On 2018-09-04 6:38 AM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Could you see what this prints on the target please?
# ./test
using vsnprintf
returned 4, errno = 0
>
> #include <cerrno>
>
> int
> getlen(char* __out, int __size __attribute__((unused)), const char* __fmt, ...)
> {
> __builtin_va_list __args;
> __builtin_va_start(__args, __fmt);
>
> #if _GLIBCXX_USE_C99_STDIO
> __builtin_puts("using vsnprintf");
> const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
> #else
> __builtin_puts("using vsprintf");
> const int __ret = __builtin_vsprintf(__out, __fmt, __args);
> #endif
> return __ret;
> }
>
> int main()
> {
> char out[64];
> errno = 0;
> int len = getlen(out, 0, "%.*g", 6, 1.99);
> __builtin_printf("returned %d, errno = %d\n", len, errno);
> }
>
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From: "blastrock at free dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87207] ODR issue with static functions and lambda templates
Date: Tue, 04 Sep 2018 11:51:00 -0000
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--- Comment #6 from blastrock at free dot fr ---
Great, thanks!
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Tue, 04 Sep 2018 11:58:00 -0000
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--- Comment #10 from dave.anglin at bell dot net ---
On 2018-09-04 4:51 AM, redi at gcc dot gnu.org wrote:
> The code assumes __convert_from_v always returns a valid length, but it seems
> to be failing and returning -1.
vsnprintf/snprintf can return a negative value if an error occurs.
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From: "alexander.nesterovskiy at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87214] New: [9 Regression] SPEC CPU2017, CPU2006 520/620, 403 runfails after r263772 with march=skylake-avx512
Date: Tue, 04 Sep 2018 12:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87214
Bug ID: 87214
Summary: [9 Regression] SPEC CPU2017, CPU2006 520/620, 403
runfails after r263772 with march=skylake-avx512
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: alexander.nesterovskiy at intel dot com
Target Milestone: ---
There are runfails for the following benchmarks since r263772:
SPEC2017 520/620: (Segmentation fault, minimal optset to reproduce: "-O3
-march=skylake-avx512 -flto")
SPEC2006 445: (SPEC miscompare, minimal optset to reproduce: "-O3
-march=skylake-avx512")
Running 520.omnetpp_r under GDB:
---
...
Program received signal SIGSEGV, Segmentation fault.
0x00000000004a611e in isName (s=<optimized out>, this=<optimized out>) at
simulator/ccomponent.cc:143
143 if (paramv[i].isName(parname))
(gdb) backtrace
#0 0x00000000004a611e in isName (s=<optimized out>, this=<optimized out>) at
simulator/ccomponent.cc:143
#1 cComponent::findPar (this=0x7ffff6633380, parname=0x7ffff6603548 "bs") at
simulator/ccomponent.cc:143
#2 0x00000000004a87b3 in cComponent::par(char const*) () at
simulator/ccomponent.cc:133
#3 0x00000000004b676d in cNEDNetworkBuilder::doParam(cComponent*,
ParamElement*, bool) () at simulator/cnednetworkbuilder.cc:179
#4 0x00000000004b8610 in doParams (isSubcomponent=false, paramsNode=<optimized
out>, component=0x7ffff6633380, this=0x7fffffffaaf0) at
simulator/cnednetworkbuilder.cc:139
#5 cNEDNetworkBuilder::addParametersAndGatesTo(cComponent*, cNEDDeclaration*)
() at simulator/cnednetworkbuilder.cc:105
#6 0x000000000048843b in addParametersAndGatesTo (module=0x7ffff6633380,
this=<optimized out>) at <GCC_PATH>/include/c++/9.0.0/bits/stl_tree.h:211
#7 cModuleType::create(char const*, cModule*, int, int) () at
simulator/ccomponenttype.cc:156
#8 0x000000000045916f in setupNetwork (network=<optimized out>,
this=0x7ffff653bc40) at simulator/cnamedobject.h:117
#9 Cmdenv::run() () at simulator/cmdenv.cc:253
#10 0x00000000005186ec in EnvirBase::run(int, char**, cConfiguration*) () at
simulator/envirbase.cc:230
#11 0x000000000043d60d in setupUserInterface(int, char**, cConfiguration*)
[clone .constprop.112] () at simulator/startup.cc:234
#12 0x000000000042446a in main (argc=1, argv=0x7fffffffb1c8) at
simulator/main.cc:39
---
403.gcc miscompares: 200.s, g23.s, scilab.s.
For example:
---
$ diff -u g23_ref.s g23.s | head -n 16
--- g23_ref.s
+++ g23.s
@@ -1746,19 +1746,19 @@
testq %rbx, %rbx
jne .L904
movq %r12, %rdx
- xorl %r8d, %r8d
+ xorl %esi, %esi
negq %rdx
.L905:
addq %rcx, %rdx
- leaq (%rax,%r8), %rax
+ leaq (%rax,%rsi), %rax
leaq 1(%rdx), %rcx
- cmpq %r8, %rax
+ cmpq %rsi, %rax
---
Unfortunately I didn't manage to create a reproducer.
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Subject: [Bug tree-optimization/87211] [9 Regression] gcc ICE at O2: in set_ssa_val_to, at tree-ssa-sccvn.c:3628
Date: Tue, 04 Sep 2018 12:05:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 4 12:04:42 2018
New Revision: 264079
URL: https://gcc.gnu.org/viewcvs?rev=264079&root=gcc&view=rev
Log:
2018-09-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/87211
* tree-ssa-sccvn.c (visit_phi): When value-numbering to a
backedge value we're supposed to treat as VARYING also number
the PHI to VARYING in case it got a different value-number already.
* gcc.dg/torture/pr87211.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87211.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #11 from dave.anglin at bell dot net ---
On 2018-09-04 7:58 AM, dave.anglin at bell dot net wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #10 from dave.anglin at bell dot net ---
> On 2018-09-04 4:51 AM, redi at gcc dot gnu.org wrote:
>> The code assumes __convert_from_v always returns a valid length, but it seems
>> to be failing and returning -1.
> vsnprintf/snprintf can return a negative value if an error occurs.
I think we are hitting one of these problems:
JAGaf80770: vsnprintf and snprintf return doesn't conform to C99
JAGaf47646: with small buffer vsnprintf always returns -1
Probably, we should use libiberty version unless we can work around the
buffer size issue.
>From gcc-bugs-return-614589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:25:42 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Tue, 04 Sep 2018 12:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44657
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44657&action=edit
gcc9-pr82853.patch
Full untested patch. For x % C1 == C2 it handles all unsigned cases where C1
is odd, if C1 is even, just cases where C2 <= -1U % C1, if signed modulo, just
x % C1 == 0 cases (where C1 is not INT_MIN).
>From gcc-bugs-return-614590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:28:43 2018
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Subject: [Bug debug/87215] New: Unused debug info with -std=c++17
Date: Tue, 04 Sep 2018 12:28:00 -0000
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Bug ID: 87215
Summary: Unused debug info with -std=c++17
Product: gcc
Version: 8.2.1
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gcc-7 and gcc-8 produce much more unused (?) debug info when compiling in C++17
mode (compared to C++14 or C++11 mode).
Seems that unused debug info elimination (-f[no-]eliminate-unused-debug-types )
does not work properly with C++17.
Source (not preprocessed, but simple):
#include <limits>
Reproduce:
g++ -std=c++14 -g -o limits-14.o -c limits.cpp
g++ -std=c++14 -g -fno-eliminate-unused-debug-types -o limits-14-ne.o -c
limits.cpp
g++ -std=c++17 -g -o limits-17.o -c limits.cpp
g++ -std=c++17 -g -fno-eliminate-unused-debug-types -o limits-17-ne.o -c
limits.cpp
g++ -std=c++17 -g -feliminate-unused-debug-types -o limits-17-e.o -c limits.cpp
wc -c limits*.o
With gcc-7 or gcc-8:
37872 limits-14-ne.o
3096 limits-14.o
69720 limits-17-e.o
69728 limits-17-ne.o
69688 limits-17.o
Ok with gcc-6:
36816 limits-14-ne.o
2864 limits-14.o
2888 limits-17-e.o
36816 limits-17-ne.o
2864 limits-17.o
(no difference between 'g++ -std=c++14 -E limits.cpp' and 'g++ -std=c++17 -E
limits.cpp' preprocessed outputs)
>From gcc-bugs-return-614591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:31:35 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #26 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44658
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44658&action=edit
pr82853-tests.tar.xz
A test generator for x % c1 == c2 expansion for unsigned, int, unsigned long
long, long long, unsigned int128 and int128 types (assuming ilp32 or lp64)
plus tests for those types. Takes about 2 minutes to compile + run on a fast
box and uses random (), so not really sure the tests should go into the
testsuite. Thoughts on that? After all, the generator isn't extra smart and
doesn't try to find problematic corner cases.
>From gcc-bugs-return-614592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:36:38 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #27 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #26)
> A test generator for x % c1 == c2 expansion for unsigned, int, unsigned long
> long, long long, unsigned int128 and int128 types (assuming ilp32 or lp64)
> plus tests for those types. Takes about 2 minutes to compile + run on a fast
> box and uses random (), so not really sure the tests should go into the
> testsuite. Thoughts on that? After all, the generator isn't extra smart and
> doesn't try to find problematic corner cases.
If you work on the 'guess' of a 10x slowdown when using simulators, that's
probably too long particularly if it's not delivering high value.
Ultimately, it will depend on how much of that 2 minutes is during
generate/compile and how much during run time.
>From gcc-bugs-return-614593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:38:41 2018
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Subject: [Bug target/66203] aarch64-none-elf does not automatically find librdimon
Date: Tue, 04 Sep 2018 12:38:00 -0000
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
The Arm builds that do not need anything from libgloss (and thus do not need a
specs file) while linking come from a configuration that hard codes the
underlying runtime monitor (usually the arm semihosting ABI) directly into
newlib.
I understand that's deprecated and was not implemented for AArch64.
>From gcc-bugs-return-614594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:46:08 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #28 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On i9-7960X I get (cc1 is -O0 checking build, so bootstrapped compiler might be
much faster), will repeat that with bootstrapped compiler if it succeeds. The
__int128 and unsigned __int128 tests are clearly too expensive.
for i in 1 2 3 4 5 6; do time ./cc1 -quiet -O2 -o pr82853-$i.{s,c}; gcc -o
pr82853-$i{,.s}; time ./pr82853-$i; echo $?; done
real 0m11.273s
user 0m11.182s
sys 0m0.039s
real 0m2.997s
user 0m2.993s
sys 0m0.001s
0
real 0m8.145s
user 0m8.082s
sys 0m0.026s
real 0m2.166s
user 0m2.165s
sys 0m0.000s
0
real 0m11.683s
user 0m11.597s
sys 0m0.033s
real 0m5.315s
user 0m5.312s
sys 0m0.000s
0
real 0m7.972s
user 0m7.903s
sys 0m0.032s
real 0m3.801s
user 0m3.798s
sys 0m0.001s
0
real 0m12.846s
user 0m12.762s
sys 0m0.028s
real 0m17.471s
user 0m17.458s
sys 0m0.001s
0
real 0m8.546s
user 0m8.486s
sys 0m0.022s
real 0m13.738s
user 0m13.728s
sys 0m0.000s
>From gcc-bugs-return-614595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:52:34 2018
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Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
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Neha Gowda <neha.gnu.gcc at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |neha.gnu.gcc at gmail dot com
--- Comment #7 from Neha Gowda <neha.gnu.gcc at gmail dot com> ---
cat test.cpp
==========================================================================
#define _NOEXCEPT_OP(x) noexcept(x)
template<class _Ty> inline
bool _Swap_adl(_Ty& _Left, _Ty& _Right)
{
return (true);
}
template<class _Ty1,
class _Ty2>
struct pair
{
typedef pair<_Ty1, _Ty2> _Myt;
typedef _Ty1 first_type;
typedef _Ty2 second_type;
void swap(_Myt& _Right)
_NOEXCEPT_OP(_NOEXCEPT_OP(_Swap_adl(this->first, _Right.first))
&& _NOEXCEPT_OP(_Swap_adl(this->second,
_Right.second)))
{
if (this != &_Right)
{ // different, worth swapping
_Swap_adl(first, _Right.first);
_Swap_adl(second, _Right.second);
}
}
_Ty1 first;
_Ty2 second;
};
==========================================================================
g++ test.cpp -c
test.cpp:18:39: error: invalid use of ‘this’ at top level
test.cpp:19:30: error: invalid use of ‘this’ at top level
Same issue with the current upstream sources as well.
Please let me know if there is any patch or workaround to fix the issue.
Else please let me know how to fix this issue in GCC.
Thanks
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Subject: [Bug debug/87215] Unused debug info with -std=c++17
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org,
| |vries at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a related PR about us emitting more unused debug for global
declarations
(rather than types) and DWARF mode not implementing
-feliminate-unused-debug-symbols). This probably is the reason for this
regression by making the previously unused types no longer unused.
>From gcc-bugs-return-614597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:55:13 2018
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Subject: [Bug tree-optimization/87214] [9 Regression] SPEC CPU2017, CPU2006 520/620, 403 runfails after r263772 with march=skylake-avx512
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 12:55:44 2018
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Subject: [Bug tree-optimization/87211] [9 Regression] gcc ICE at O2: in set_ssa_val_to, at tree-ssa-sccvn.c:3628
Date: Tue, 04 Sep 2018 12:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 13:00:57 2018
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Subject: [Bug target/87156] [9 Regression] ICE building libstdc++ for mips64
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Paul Hua <paul.hua.gm at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |hubicka at ucw dot cz,
| |paul.hua.gm at gmail dot com
--- Comment #1 from Paul Hua <paul.hua.gm at gmail dot com> ---
confirmed.
cced: Jan Hubicka <hubicka@ucw.cz>
>From gcc-bugs-return-614600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 13:49:04 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to dave.anglin from comment #11)
> JAGaf47646: with small buffer vsnprintf always returns -1
Aha, that is probably it. We pass 0 as the size, which is supposed to make
vsnprintf tell you how many bytes it would have written (as that's how we find
out the required length).
It's curious that it printed "returned 4, errno = 0" when you tested it though.
Maybe GCC optimized the call and didn't use the OS function.
Does it return -1 if you use -fno-builtin-vsnprintf ?
>From gcc-bugs-return-614601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 14:04:55 2018
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From: "SztfG at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87208] dependent name resolution selects a function it should have NEVER considered
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--- Comment #2 from SztfG at yandex dot ru ---
(In reply to Jonathan Wakely from comment #1)
> Dup of PR 51577 ?
Strictly speaking, it is not a dup, because PR 51577 and all the bugs marked as
dups of PR 51577 are about finding an operator with namespaced parameters in
the global namespace, but here the situation is the reverse. But the bugs could
be closely related.
>From gcc-bugs-return-614602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 14:16:40 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #13 from dave.anglin at bell dot net ---
On 2018-09-04 9:48 AM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to dave.anglin from comment #11)
>> JAGaf47646: with small buffer vsnprintf always returns -1
> Aha, that is probably it. We pass 0 as the size, which is supposed to make
> vsnprintf tell you how many bytes it would have written (as that's how we find
> out the required length).
>
> It's curious that it printed "returned 4, errno = 0" when you tested it though.
> Maybe GCC optimized the call and didn't use the OS function.
>
> Does it return -1 if you use -fno-builtin-vsnprintf ?
No. I checked .s file and GCC isn't optimizing the call. It returns -1
when passed a nonzero size
that is too small.
Passing 4 causes it to return -1:
using vsnprintf
returned -1, errno = 0
Passing 5 is okay:
using vsnprintf
returned 4, errno = 0
Maybe it's returning an incorrect length when passed 0 in some locales?
Dave
>From gcc-bugs-return-614603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 14:18:54 2018
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Subject: [Bug c++/87208] dependent name resolution selects a function it should have NEVER considered
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-04
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=51577
Ever confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah yes, I didn't look closely enough.
Confirmed. Every release I tested from 4.3 onwards has the same behaviour, so
it doesn't seem to be a regression.
>From gcc-bugs-return-614604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 14:34:35 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #14 from dave.anglin at bell dot net ---
On 2018-09-04 10:16 AM, dave.anglin at bell dot net wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #13 from dave.anglin at bell dot net ---
> On 2018-09-04 9:48 AM, redi at gcc dot gnu.org wrote:
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>>
>> --- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
>> (In reply to dave.anglin from comment #11)
>>> JAGaf47646: with small buffer vsnprintf always returns -1
>> Aha, that is probably it. We pass 0 as the size, which is supposed to make
>> vsnprintf tell you how many bytes it would have written (as that's how we find
>> out the required length).
>>
>> It's curious that it printed "returned 4, errno = 0" when you tested it though.
>> Maybe GCC optimized the call and didn't use the OS function.
>>
>> Does it return -1 if you use -fno-builtin-vsnprintf ?
> No. I checked .s file and GCC isn't optimizing the call. It returns -1
> when passed a nonzero size
> that is too small.
>
> Passing 4 causes it to return -1:
> using vsnprintf
> returned -1, errno = 0
>
> Passing 5 is okay:
> using vsnprintf
> returned 4, errno = 0
>
> Maybe it's returning an incorrect length when passed 0 in some locales?
No, it uses the buffer when passed a a size of 0:
https://stackoverflow.com/questions/619497/heap-corruption-in-hp-ux
>From gcc-bugs-return-614605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 14:46:14 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 14:46:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm that. I've got quite simple patch that eventually generates:
h:
.LFB0:
movl $42, %edi
jmp f
for both cases you provided.
By the way do you have a more complex test-case? This one is simple as all
non-default cases contain same code.
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Subject: [Bug fortran/87212] Declaration with array constructor: Error message on valid code
Date: Tue, 04 Sep 2018 14:52:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The same error occurs with SUM.
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 14:53:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-614608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 15:01:38 2018
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Subject: [Bug target/86744] gcc.target/i386/addr-sel-1.c XPASSes on 32-bit x86
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--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Sep 4 15:00:41 2018
New Revision: 264086
URL: https://gcc.gnu.org/viewcvs?rev=264086&root=gcc&view=rev
Log:
Don't xfail gcc.target/i386/addr-sel-1.c (PR target/86744)
PR target/86744
* gcc.target/i386/addr-sel-1.c: Don't xfail "b\\+1" scan.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/addr-sel-1.c
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Subject: [Bug target/86744] gcc.target/i386/addr-sel-1.c XPASSes on 32-bit x86
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 9.0.
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #15 from dave.anglin at bell dot net ---
On 2018-09-04 4:51 AM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> And the previous line an alloca call using __len:
>
> _CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
> * __len));
> __ctype.widen(__cs, __cs + __len, __ws);
>
>
> The code assumes __convert_from_v always returns a valid length, but it seems
> to be failing and returning -1.
It appears to me we are using the first hunk of the #if:
#if _GLIBCXX_USE_C99_STDIO
       // Precision is always used except for hexfloat format.
       const bool __use_prec =
         (__io.flags() & ios_base::floatfield) != ios_base::floatfield;
       // First try a buffer perhaps big enough (most probably sufficient
       // for non-ios_base::fixed outputs)
       int __cs_size = __max_digits * 3;
       char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
       if (__use_prec)
         __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
                                       __fbuf, __prec, __v);
       else
         __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
                                       __fbuf, __v);
       // If the buffer was not large enough, try again with the
correct size.
       if (__len >= __cs_size)
         {
           __cs_size = __len + 1;
           __cs = static_cast<char*>(__builtin_alloca(__cs_size));
           if (__use_prec)
             __len = std::__convert_from_v(_S_get_c_locale(), __cs,
__cs_size,
                                           __fbuf, __prec, __v);
           else
             __len = std::__convert_from_v(_S_get_c_locale(), __cs,
__cs_size,
                                           __fbuf, __v);
         }
#else
       // Consider the possibility of long ios_base::fixed outputs
       const bool __fixed = __io.flags() & ios_base::fixed;
       const int __max_exp =
__gnu_cxx::__numeric_traits<_ValueT>::__max_exponent10;
       // The size of the output string is computed as follows.
       // ios_base::fixed outputs may need up to __max_exp + 1 chars
       // for the integer part + __prec chars for the fractional part
       // + 3 chars for sign, decimal point, '\0'. On the other hand,
       // for non-fixed outputs __max_digits * 2 + __prec chars are
       // largely sufficient.
       const int __cs_size = __fixed ? __max_exp + __prec + 4
                                     : __max_digits * 2 + __prec;
       char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
       __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, __fbuf,
                                     __prec, __v);
#endif
In the first hunk, __cs_size is not zero but __max_digits * 3. If the
buffer is too small,
__len will be -1. We need to check for -1 in second if. Is
incrementing __cs_size by
1 enough?
>From gcc-bugs-return-614611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 15:17:17 2018
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From: "pdimov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 15:17:00 -0000
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--- Comment #4 from Peter Dimov <pdimov at gmail dot com> ---
If the code is not the same the jump table is not optimized out and there's no
extra check. But it also happens with code that is not the same on the C++
side, for example:
```
struct X
{
int v;
};
template<int I> struct Y: X
{
};
void f( X* x );
void h( unsigned ix, void* p )
{
switch( ix )
{
case 0: f( (Y<0>*)p ); break;
case 1: f( (Y<1>*)p ); break;
case 2: f( (Y<2>*)p ); break;
case 3: f( (Y<3>*)p ); break;
case 4: f( (Y<4>*)p ); break;
case 5: f( (Y<5>*)p ); break;
default: __builtin_unreachable();
}
}
```
```
h(unsigned int, void*):
cmp edi, 5
jbe .L5
.L5:
mov rdi, rsi
jmp f(X*)
```
https://godbolt.org/z/2Lh_GZ
A variation on the same theme, which demonstrates another kind of missed
optimization:
```
struct X
{
int v;
};
template<int I> struct Y: X
{
};
int h( unsigned ix, void* p )
{
switch( ix )
{
case 0: return ((Y<0>*)p)->v;
case 1: return ((Y<1>*)p)->v;
case 2: return ((Y<2>*)p)->v;
case 3: return ((Y<3>*)p)->v;
case 4: return ((Y<4>*)p)->v;
case 5: return ((Y<5>*)p)->v;
default: __builtin_unreachable();
}
}
```
```
h(unsigned int, void*):
mov edi, edi
mov eax, DWORD PTR [rsi]
jmp [QWORD PTR .L4[0+rdi*8]]
.L4:
.quad .L9
.quad .L8
.quad .L7
.quad .L6
.quad .L5
.quad .L3
.L5:
ret
.L3:
ret
.L9:
ret
.L8:
ret
.L7:
ret
.L6:
ret
```
https://godbolt.org/z/lCzlR2
There's a table, so there's no redundant check.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Tue, 04 Sep 2018 15:21:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes I've just realised that passing 0 was a red herring, because we take the
#if _GLIBCXX_USE_C99_STDIO branch. Sorry.
I don't think __cs_size + 1 will be enough in general. There's no reason to
think it's only 1 byte too small.
Maybe we need a kluge like:
--- a/libstdc++-v3/include/bits/locale_facets.tcc
+++ b/libstdc++-v3/include/bits/locale_facets.tcc
@@ -1008,6 +1008,20 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
__len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
__fbuf, __v);
+#ifdef __hpux
+ while (__len == -1 && __cs_size < 1024)
+ {
+ __cs_size *= 2;
+ char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
+ if (__use_prec)
+ __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
+ __fbuf, __prec, __v);
+ else
+ __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
+ __fbuf, __v);
+ }
+#endif
+
// If the buffer was not large enough, try again with the correct size.
if (__len >= __cs_size)
{
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From: "pdimov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 15:24:00 -0000
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--- Comment #5 from Peter Dimov <pdimov at gmail dot com> ---
Another:
```
struct X
{
int v;
};
template<int I> struct Y: X
{
};
void f( int v );
void h( unsigned ix, void* p )
{
switch( ix )
{
case 0: f( ((Y<0>*)p)->v ); break;
case 1: f( ((Y<1>*)p)->v ); break;
case 2: f( ((Y<2>*)p)->v ); break;
case 3: f( ((Y<3>*)p)->v ); break;
case 4: f( ((Y<4>*)p)->v ); break;
case 5: f( ((Y<5>*)p)->v ); break;
default: __builtin_unreachable();
}
}
```
```
h(unsigned int, void*):
mov edi, edi
jmp [QWORD PTR .L4[0+rdi*8]]
.L4:
.quad .L3
.quad .L3
.quad .L3
.quad .L3
.quad .L3
.quad .L3
.L3:
mov edi, DWORD PTR [rsi]
jmp f(int)
```
https://godbolt.org/z/pGVx6W
This however demonstrates a different problem, so it may need to go into a
separate bug.
>From gcc-bugs-return-614614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 15:31:02 2018
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Subject: [Bug testsuite/87216] New: FAIL: gcc.dg/tree-prof/pr59521-3.c scan-assembler \\nfoo:\\n.*cmp.*1,.*cmp.*10,.*cmp.*100 on darwin
Date: Tue, 04 Sep 2018 15:31:00 -0000
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Bug ID: 87216
Summary: FAIL: gcc.dg/tree-prof/pr59521-3.c scan-assembler
\\nfoo:\\n.*cmp.*1,.*cmp.*10,.*cmp.*100 on darwin
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
Component: testsuite
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CC: iains at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
The test gcc.dg/tree-prof/pr59521-3.c fails on darwin. This is "fixed" with the
following patch:
--- ../_clean/gcc/testsuite/gcc.dg/tree-prof/pr59521-3.c 2018-09-03
10:54:47.000000000 +0200
+++ gcc/testsuite/gcc.dg/tree-prof/pr59521-3.c 2018-09-04 17:25:45.000000000
+0200
@@ -31,4 +31,4 @@ int main()
}
}
-/* { dg-final-use-not-autofdo { scan-assembler
"\nfoo:\n.*cmp.*1,.*cmp.*10,.*cmp.*100" { target i?86-*-* x86_64-*-* } } } */
+/* { dg-final-use-not-autofdo { scan-assembler
"\n_?foo:\n.*cmp.*1,.*cmp.*10,.*cmp.*100" { target i?86-*-* x86_64-*-* } } } */
[
>From gcc-bugs-return-614615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 15:44:37 2018
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From: "michal.w.urbanczyk at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86740] [8/9 Regression] ICE with hana and nested lambdas (likely a regression, tsubst_copy, at cp/pt.c:15325)
Date: Tue, 04 Sep 2018 15:44:00 -0000
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Michal Urbanczyk <michal.w.urbanczyk at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |michal.w.urbanczyk at gmail dot co
| |m
--- Comment #4 from Michal Urbanczyk <michal.w.urbanczyk at gmail dot com> ---
I have encountered a similar issue without using Boost.Hana. My code worked
with GCC 7.3 and stopped compiling with GCC 8.1.
The reduced testcase:
struct Constant
{
static constexpr int value = 0;
};
template<typename F>
void invokeWithConstant(F &&f)
{
f(Constant{});
}
int foo()
{
int count = 0;
invokeWithConstant([&] (auto id1)
{
invokeWithConstant([&] (auto id2)
{
if constexpr(id1.value == 0 && id2.value == 0)
{
[&] { count = 1; } ();
}
});
});
return count;
}
====
Can be tested online at https://godbolt.org/z/N5rNYl
My case yields ICE from the very same line.
>From gcc-bugs-return-614616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 15:59:49 2018
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Subject: [Bug debug/86985] Generated DWARF does not distinguish between zero-length and flexible array types
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00994.html
>From gcc-bugs-return-614617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 16:07:52 2018
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From: "rpirrera at aitek dot it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86505] [6/7 Regression] __builtin_va_arg_pack_len() computes the number of arguments wrongly
Date: Tue, 04 Sep 2018 16:07:00 -0000
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--- Comment #9 from rpirrera at aitek dot it ---
The patch cannot be applied to the compiler we are using (GCC 5), we get a
function not defined error.
Is it possible to have a patch for GCC 5 too?
Thank you.
>From gcc-bugs-return-614618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 16:13:54 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
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--- Comment #17 from dave.anglin at bell dot net ---
On 2018-09-04 11:20 AM, redi at gcc dot gnu.org wrote:
> I don't think __cs_size + 1 will be enough in general. There's no reason to
> think it's only 1 byte too small.
>
> Maybe we need a kluge like:
Maybe. I read in manpage that old glibc versions also return -1 when
the output is truncated.
I was about to try the attached change. Was hoping that a slightly
larger __cs_size would work.
>From gcc-bugs-return-614619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 16:32:18 2018
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Subject: [Bug fortran/87103] [OOP] ICE in gfc_new_symbol() due to overlong symbol name
Date: Tue, 04 Sep 2018 16:32:00 -0000
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--- Comment #2 from Andrew Benson <abensonca at gmail dot com> ---
Thanks Janus. That does solve the problem, and regtests cleanly, with this
patch:
Index: gcc/fortran/gfortran.h
===================================================================
--- gcc/fortran/gfortran.h (revision 264085)
+++ gcc/fortran/gfortran.h (working copy)
@@ -54,7 +54,9 @@ not after.
/* Major control parameters. */
-#define GFC_MAX_SYMBOL_LEN 63 /* Must be at least 63 for F2003. */
+/* Must be at least 63 for F2003, +1 for null terminator,
+ +12 for prefix "__tmp_class_". */
+#define GFC_MAX_SYMBOL_LEN 76
#define GFC_LETTERS 26 /* Number of letters in the alphabet. */
#define MAX_SUBRECORD_LENGTH 2147483639 /* 2**31-9 */
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Received: (qmail 18525 invoked by uid 48); 4 Sep 2018 16:35:34 -0000
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Tue, 04 Sep 2018 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think we care about glibc < 2.0.6 though.
__max_digits * 4 is not enough for:
std::cout << std::fixed << std::numeric_limits<long double>::max();
That needs 4940 bytes, but we don't want to unconditionally alloca that amount.
Maybe:
--- a/libstdc++-v3/include/bits/locale_facets.tcc
+++ b/libstdc++-v3/include/bits/locale_facets.tcc
@@ -1008,6 +1008,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
__len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
__fbuf, __v);
+#ifdef __hpux
+ if (__len == -1)
+ __len = __cs_size = 5000;
+#endif
+
// If the buffer was not large enough, try again with the correct size.
if (__len >= __cs_size)
{
@@ -1020,6 +1025,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
__len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
__fbuf, __v);
}
+
+#ifdef __hpux
+ if (__len == -1)
+ return __s;
+#endif
#else
// Consider the possibility of long ios_base::fixed outputs
const bool __fixed = __io.flags() & ios_base::fixed;
>From gcc-bugs-return-614621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:01:08 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Tue, 04 Sep 2018 17:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #19 from dave.anglin at bell dot net ---
On 2018-09-04 12:35 PM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> I don't think we care about glibc < 2.0.6 though.
>
> __max_digits * 4 is not enough for:
>
> std::cout << std::fixed << std::numeric_limits<long double>::max();
>
> That needs 4940 bytes, but we don't want to unconditionally alloca that amount.
>
> Maybe:
>
> --- a/libstdc++-v3/include/bits/locale_facets.tcc
> +++ b/libstdc++-v3/include/bits/locale_facets.tcc
> @@ -1008,6 +1008,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
> __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
> __fbuf, __v);
>
> +#ifdef __hpux
> + if (__len == -1)
> + __len = __cs_size = 5000;
> +#endif
> +
> // If the buffer was not large enough, try again with the correct size.
> if (__len >= __cs_size)
> {
> @@ -1020,6 +1025,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
> __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
> __fbuf, __v);
> }
> +
> +#ifdef __hpux
> + if (__len == -1)
> + return __s;
> +#endif
> #else
> // Consider the possibility of long ios_base::fixed outputs
> const bool __fixed = __io.flags() & ios_base::fixed;
>
Testing.
>From gcc-bugs-return-614622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:16:55 2018
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Received: (qmail 86166 invoked by uid 48); 4 Sep 2018 17:16:49 -0000
From: "toon at moene dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87218] New: Extremely long compile time with 710 line Fortran code using -O2
Date: Tue, 04 Sep 2018 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87218
Bug ID: 87218
Summary: Extremely long compile time with 710 line Fortran code
using -O2
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: toon at moene dot org
Target Milestone: ---
Created attachment 44660
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44660&action=edit
Source of Fortran routine taking 12+ minutes to compile
Attached file compiled with:
toon@moene:~/src$ gfortran -v -ftime-report -O2 -S suafn.f90
Using built-in specs.
COLLECT_GCC=gfortran
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-4)
COLLECT_GCC_OPTIONS='-v' '-ftime-report' '-O2' '-S' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/8/f951 suafn.f90 -quiet -dumpbase suafn.f90
-mtune=generic -march=x86-64 -auxbase suafn -O2 -version -ftime-report -o
suafn.s -fintrinsic-modules-path /usr/lib/gcc/x86_64-linux-gnu/8/finclude
GNU Fortran (Debian 8.2.0-4) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (Debian 8.2.0-4) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
gives this time report:
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
182 kB ( 0%)
phase parsing : 0.05 ( 0%) 0.00 ( 0%) 0.08 ( 0%)
7841 kB ( 6%)
phase opt and generate : 534.57 (100%) 0.45 (100%) 553.90 (100%)
127110 kB ( 94%)
dump files : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
callgraph construction : 0.03 ( 0%) 0.00 ( 0%) 0.06 ( 0%)
4906 kB ( 4%)
ipa function summary : 0.13 ( 0%) 0.00 ( 0%) 0.09 ( 0%)
5 kB ( 0%)
ipa pure const : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
ipa icf : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
ipa free inline summary : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
cfg cleanup : 487.98 ( 91%) 0.04 ( 9%) 503.57 ( 91%)
1045 kB ( 1%)
trivially dead code : 0.10 ( 0%) 0.00 ( 0%) 0.10 ( 0%)
0 kB ( 0%)
df scan insns : 0.08 ( 0%) 0.03 ( 7%) 0.10 ( 0%)
0 kB ( 0%)
df multiple defs : 0.10 ( 0%) 0.00 ( 0%) 0.10 ( 0%)
0 kB ( 0%)
df reaching defs : 0.29 ( 0%) 0.01 ( 2%) 0.31 ( 0%)
0 kB ( 0%)
df live regs : 1.07 ( 0%) 0.00 ( 0%) 1.14 ( 0%)
0 kB ( 0%)
df live&initialized regs : 0.26 ( 0%) 0.00 ( 0%) 0.29 ( 0%)
0 kB ( 0%)
df must-initialized regs : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
df use-def / def-use chains : 0.12 ( 0%) 0.00 ( 0%) 0.12 ( 0%)
0 kB ( 0%)
df live reg subwords : 0.02 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
df reg dead/unused notes : 0.79 ( 0%) 0.01 ( 2%) 0.87 ( 0%)
4881 kB ( 4%)
register information : 0.19 ( 0%) 0.00 ( 0%) 0.19 ( 0%)
0 kB ( 0%)
alias analysis : 0.26 ( 0%) 0.00 ( 0%) 0.26 ( 0%)
8707 kB ( 6%)
alias stmt walking : 24.54 ( 5%) 0.16 ( 36%) 27.03 ( 5%)
429 kB ( 0%)
register scan : 0.05 ( 0%) 0.00 ( 0%) 0.05 ( 0%)
0 kB ( 0%)
rebuild jump labels : 0.06 ( 0%) 0.00 ( 0%) 0.05 ( 0%)
0 kB ( 0%)
parser (global) : 0.05 ( 0%) 0.00 ( 0%) 0.08 ( 0%)
7773 kB ( 6%)
inline parameters : 0.19 ( 0%) 0.00 ( 0%) 0.11 ( 0%)
516 kB ( 0%)
tree gimplify : 0.48 ( 0%) 0.01 ( 2%) 0.59 ( 0%)
6059 kB ( 4%)
tree eh : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
tree VRP : 0.04 ( 0%) 0.00 ( 0%) 0.05 ( 0%)
6 kB ( 0%)
tree Early VRP : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
3 kB ( 0%)
tree copy propagation : 0.00 ( 0%) 0.01 ( 2%) 0.00 ( 0%)
0 kB ( 0%)
tree PTA : 0.45 ( 0%) 0.01 ( 2%) 0.46 ( 0%)
1290 kB ( 1%)
tree SSA rewrite : 0.01 ( 0%) 0.01 ( 2%) 0.00 ( 0%)
2444 kB ( 2%)
tree operand scan : 0.02 ( 0%) 0.01 ( 2%) 0.05 ( 0%)
1095 kB ( 1%)
dominator optimization : 0.03 ( 0%) 0.01 ( 2%) 0.04 ( 0%)
5347 kB ( 4%)
tree SRA : 0.03 ( 0%) 0.00 ( 0%) 0.03 ( 0%)
0 kB ( 0%)
tree CCP : 0.02 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
tree reassociation : 0.01 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
tree PRE : 0.12 ( 0%) 0.00 ( 0%) 0.12 ( 0%)
3964 kB ( 3%)
tree FRE : 0.16 ( 0%) 0.00 ( 0%) 0.17 ( 0%)
2792 kB ( 2%)
tree code sinking : 0.01 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
tree forward propagate : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
tree conservative DCE : 0.03 ( 0%) 0.01 ( 2%) 0.07 ( 0%)
0 kB ( 0%)
tree aggressive DCE : 0.02 ( 0%) 0.02 ( 4%) 0.04 ( 0%)
6 kB ( 0%)
tree DSE : 0.10 ( 0%) 0.00 ( 0%) 0.10 ( 0%)
2838 kB ( 2%)
tree strlen optimization : 8.29 ( 2%) 0.00 ( 0%) 8.66 ( 2%)
312 kB ( 0%)
expand : 0.14 ( 0%) 0.02 ( 4%) 0.17 ( 0%)
24881 kB ( 18%)
post expand cleanups : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
lower subreg : 0.02 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
forward prop : 0.35 ( 0%) 0.01 ( 2%) 0.51 ( 0%)
3274 kB ( 2%)
CSE : 0.54 ( 0%) 0.00 ( 0%) 0.54 ( 0%)
1759 kB ( 1%)
dead code elimination : 0.14 ( 0%) 0.00 ( 0%) 0.13 ( 0%)
0 kB ( 0%)
dead store elim1 : 0.24 ( 0%) 0.00 ( 0%) 0.23 ( 0%)
1141 kB ( 1%)
dead store elim2 : 0.19 ( 0%) 0.01 ( 2%) 0.19 ( 0%)
1551 kB ( 1%)
CPROP : 0.64 ( 0%) 0.00 ( 0%) 0.64 ( 0%)
2882 kB ( 2%)
PRE : 0.02 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
CSE 2 : 0.27 ( 0%) 0.00 ( 0%) 0.28 ( 0%)
736 kB ( 1%)
combiner : 1.20 ( 0%) 0.00 ( 0%) 1.27 ( 0%)
5700 kB ( 4%)
if-conversion : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
integrated RA : 1.42 ( 0%) 0.01 ( 2%) 1.51 ( 0%)
13454 kB ( 10%)
LRA non-specific : 0.33 ( 0%) 0.00 ( 0%) 0.35 ( 0%)
2055 kB ( 2%)
LRA virtuals elimination : 0.08 ( 0%) 0.00 ( 0%) 0.07 ( 0%)
264 kB ( 0%)
LRA reload inheritance : 0.06 ( 0%) 0.00 ( 0%) 0.05 ( 0%)
309 kB ( 0%)
LRA create live ranges : 0.21 ( 0%) 0.00 ( 0%) 0.21 ( 0%)
369 kB ( 0%)
LRA hard reg assignment : 0.02 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
LRA rematerialization : 0.06 ( 0%) 0.00 ( 0%) 0.06 ( 0%)
0 kB ( 0%)
reload CSE regs : 0.30 ( 0%) 0.00 ( 0%) 0.30 ( 0%)
2289 kB ( 2%)
ree : 0.02 ( 0%) 0.00 ( 0%) 0.03 ( 0%)
0 kB ( 0%)
thread pro- & epilogue : 0.04 ( 0%) 0.00 ( 0%) 0.04 ( 0%)
7 kB ( 0%)
if-conversion 2 : 0.05 ( 0%) 0.00 ( 0%) 0.05 ( 0%)
0 kB ( 0%)
peephole 2 : 0.06 ( 0%) 0.00 ( 0%) 0.06 ( 0%)
1687 kB ( 1%)
hard reg cprop : 0.06 ( 0%) 0.00 ( 0%) 0.06 ( 0%)
150 kB ( 0%)
scheduling 2 : 1.30 ( 0%) 0.06 ( 13%) 1.51 ( 0%)
9237 kB ( 7%)
machine dep reorg : 0.08 ( 0%) 0.00 ( 0%) 0.08 ( 0%)
0 kB ( 0%)
reorder blocks : 0.07 ( 0%) 0.00 ( 0%) 0.07 ( 0%)
0 kB ( 0%)
shorten branches : 0.09 ( 0%) 0.00 ( 0%) 0.09 ( 0%)
0 kB ( 0%)
final : 0.13 ( 0%) 0.00 ( 0%) 0.14 ( 0%)
2362 kB ( 2%)
variable output : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
9 kB ( 0%)
straight-line strength reduction : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
store merging : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
698 kB ( 1%)
rest of compilation : 0.22 ( 0%) 0.00 ( 0%) 0.22 ( 0%)
4823 kB ( 4%)
remove unused locals : 0.02 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
0 kB ( 0%)
address taken : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
TOTAL : 534.62 0.45 553.99
135134 kB
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-ftime-report' '-O2' '-S' '-mtune=generic'
'-march=x86-64'
>From gcc-bugs-return-614623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:16:58 2018
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From: "seurer at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87217] New: [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Tue, 04 Sep 2018 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87217
Bug ID: 87217
Summary: [9 regression] ICE in in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.c:709 when compiling SPEC2000
starting with r264069
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at linux dot vnet.ibm.com
Target Milestone: ---
0x10bd080b check_loop_closed_ssa_def
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:709
0x10bd0b67 check_loop_closed_ssa_bb
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:735
0x10bd450f verify_loop_closed_ssa(bool, loop*)
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:760
0x10bb31b3 tree_unroll_loops_completely
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-ivcanon.c:1493
0x10bb3313 execute
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-ivcanon.c:1599
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
specmake: *** [clor6.o] Error 1
specmake: *** Waiting for unfinished jobs....
seurer@granola:~/gcc/cpu2000/benchspec/CFP2000/200.sixtrack/run/00000016$
/home/seurer/gcc/install/gcc-test/bin/gfortran -c -o clor6.o -m64
-O3 -mcpu=power7 -ffast-math -funroll-loops -fpeel-loops -fvect-cost-model
-mpopcntd -mrecip=rsqrt clor6.f
during GIMPLE pass: cunroll
clor6.f:3:0:
3 | subroutine clor6
|
internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.c:709
0x10bd080b check_loop_closed_ssa_def
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:709
0x10bd0b67 check_loop_closed_ssa_bb
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:735
0x10bd450f verify_loop_closed_ssa(bool, loop*)
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-manip.c:760
0x10bb31b3 tree_unroll_loops_completely
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-ivcanon.c:1493
0x10bb3313 execute
/home/seurer/gcc/gcc-test/gcc/tree-ssa-loop-ivcanon.c:1599
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-614624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:18:31 2018
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Tue, 04 Sep 2018 17:18:00 -0000
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Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
Saw this on a power7 powerpc64 big endian machine.
>From gcc-bugs-return-614625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:20:47 2018
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From: "toon at moene dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87218] Extremely long compile time with 710 line Fortran code using -O2
Date: Tue, 04 Sep 2018 17:20:00 -0000
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--- Comment #1 from Toon Moene <toon at moene dot org> ---
Well, OK - it's more like 9 minutes ...
>From gcc-bugs-return-614626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 17:50:34 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
Date: Tue, 04 Sep 2018 17:50:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Sep 4 17:49:57 2018
New Revision: 264088
URL: https://gcc.gnu.org/viewcvs?rev=264088&root=gcc&view=rev
Log:
PR target/87198
* common/config/i386/i386-common.c (OPTION_MASK_ISA_XSAVEOPT_SET,
OPTION_MASK_ISA_XSAVES_SET, OPTION_MASK_ISA_XSAVEC_SET): Use
OPTION_MASK_ISA_XSAVE_SET instead of OPTION_MASK_ISA_XSAVE.
(OPTION_MASK_ISA_XSAVE_UNSET): Add OPTION_MASK_ISA_XSAVES_UNSET
and OPTION_MASK_ISA_XSAVEC_UNSET.
* gcc.target/i386/pr87198.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr87198.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common/config/i386/i386-common.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 18:29:58 2018
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 18:29:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
> ```
> h(unsigned int, void*):
> cmp edi, 5
> jbe .L5
> .L5:
> mov rdi, rsi
> jmp f(X*)
> ```
>
> https://godbolt.org/z/2Lh_GZ
Good, my patch can handle that and can generate direct call:
_Z1hjPv:
.LFB0:
.cfi_startproc
movq %rsi, %rdi
jmp _Z1fP1X
.cfi_endproc
>From gcc-bugs-return-614628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 18:33:51 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 18:33:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Peter Dimov from comment #5)
> Another:
>
> ```
> struct X
> {
> int v;
> };
>
> template<int I> struct Y: X
> {
> };
>
> void f( int v );
>
> void h( unsigned ix, void* p )
> {
> switch( ix )
> {
> case 0: f( ((Y<0>*)p)->v ); break;
> case 1: f( ((Y<1>*)p)->v ); break;
> case 2: f( ((Y<2>*)p)->v ); break;
> case 3: f( ((Y<3>*)p)->v ); break;
> case 4: f( ((Y<4>*)p)->v ); break;
> case 5: f( ((Y<5>*)p)->v ); break;
> default: __builtin_unreachable();
> }
> }
> ```
>
> ```
> h(unsigned int, void*):
> mov edi, edi
> jmp [QWORD PTR .L4[0+rdi*8]]
> .L4:
> .quad .L3
> .quad .L3
> .quad .L3
> .quad .L3
> .quad .L3
> .quad .L3
> .L3:
> mov edi, DWORD PTR [rsi]
> jmp f(int)
> ```
>
> https://godbolt.org/z/pGVx6W
>
> This however demonstrates a different problem, so it may need to go into a
> separate bug.
I'm not sure here Y<N> are different types here and member access based on the
type
is distinct.
>From gcc-bugs-return-614629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 18:34:14 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87216] FAIL: gcc.dg/tree-prof/pr59521-3.c scan-assembler \\nfoo:\\n.*cmp.*1,.*cmp.*10,.*cmp.*100 on darwin
Date: Tue, 04 Sep 2018 18:34:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-04
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for the patch, I'll test it and install as obvious.
>From gcc-bugs-return-614630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 19:05:04 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87219] New: [9 Regression] internal compiler error: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709
Date: Tue, 04 Sep 2018 19:05:00 -0000
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Bug ID: 87219
Summary: [9 Regression] internal compiler error: in
check_loop_closed_ssa_def, at
tree-ssa-loop-manip.c:709
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: rguenther at suse dot de
Target Milestone: ---
On x86-64, r264069 failed to build 200.sixtrack from SPEC CPU 2000:
[hjl@gnu-35 00000002]$ /export/gnu/import/git/gcc-test-spec/usr/bin/-c -o
clor6.o -DSPEC_CPU2000_LP64 -O3 -funroll-loops -ffast-math clor6.f
bash: /export/gnu/import/git/gcc-test-spec/usr/bin/-c: No such file or
directory
[hjl@gnu-35 00000002]$ /export/gnu/import/git/gcc-test-spec/usr/bin/gfortran -c
-o clor6.o -DSPEC_CPU2000_LP64 -O3 -funroll-loops -ffast-math
clor6.f
during GIMPLE pass: cunroll
clor6.f:3:0:
3 | subroutine clor6
|
internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.c:709
0x6b272c check_loop_closed_ssa_def
../../src-trunk/gcc/tree-ssa-loop-manip.c:709
0xe792b0 check_loop_closed_ssa_bb
../../src-trunk/gcc/tree-ssa-loop-manip.c:735
0xe7b376 verify_loop_closed_ssa(bool, loop*)
../../src-trunk/gcc/tree-ssa-loop-manip.c:760
0xe64bda tree_unroll_loops_completely
../../src-trunk/gcc/tree-ssa-loop-ivcanon.c:1493
0xe64c54 execute
../../src-trunk/gcc/tree-ssa-loop-ivcanon.c:1597
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[hjl@gnu-35 00000002]$
>From gcc-bugs-return-614631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 19:12:21 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Tue, 04 Sep 2018 19:12:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org
--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> ---
Created a replacement for D.43111 offset: 0, size: 32: SR.13
Created a replacement for D.43111 offset: 32, size: 32: SR.14
struct
{
bool SV::<T4394> (const struct SV *, const struct SV &) * __pfn;
int __delta;
} D.43111;
<bb 4> :
_31 = itCO_7;
D.43111 = MEM[(const struct &)_31 + 8];
SR.13_3 = MEM[(const struct &)_31 + 8];
SR.14_20 = MEM[(const struct &)_31 + 12];
_4 = SR.13_3;
if (_4 == operator!=)
goto <bb 5>; [INV]
else
goto <bb 9>; [INV]
I could be wrong but it seems likely the replacement for D.43111.__pfn is
no longer a pointer to a function.
>From gcc-bugs-return-614632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 19:25:56 2018
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
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--- Comment #8 from Peter Dimov <pdimov at gmail dot com> ---
(In reply to Martin Liška from comment #7)
> I'm not sure here Y<N> are different types here and member access based on
> the type is distinct.
Yes, one could argue that, I suppose. But in the `return ((Y<0>*)p)->v;` case
the member access _is_ lifted outside the jump table. If that's correct there,
it should also be correct here. :-)
>From gcc-bugs-return-614633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 19:44:31 2018
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
Date: Tue, 04 Sep 2018 19:44:00 -0000
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--- Comment #9 from Peter Dimov <pdimov at gmail dot com> ---
For more context, see https://godbolt.org/z/SzfpKr
```
#include <type_traits>
template<class... T> struct variant
{
std::aligned_union_t<0, T...> storage_;
unsigned index_;
};
template<class T0, class T1, class T2, class T3, class T4, class T5, class F>
auto visit( variant<T0, T1, T2, T3, T4, T5>& v, F f )
{
switch( v.index_ )
{
case 0: return f( (T0&)v.storage_ );
case 1: return f( (T1&)v.storage_ );
case 2: return f( (T2&)v.storage_ );
case 3: return f( (T3&)v.storage_ );
case 4: return f( (T4&)v.storage_ );
case 5: return f( (T5&)v.storage_ );
default: __builtin_unreachable();
}
}
struct X
{
int v;
};
template<int I> struct Y: X
{
};
using V = variant<Y<0>, Y<1>, Y<2>, Y<3>, Y<4>, Y<5>>;
void f( X& );
int g( int );
int h1( V& v )
{
return visit( v, [](X const& x){ return x.v; } );
}
int h2( V& v )
{
return visit( v, [](auto&& x){ return x.v; } );
}
void h3( V& v )
{
return visit( v, [](auto&& x){ f(x); } );
}
int h4( V& v )
{
return visit( v, [](auto&& x){ return g(x.v); } );
}
```
This generates
```
h1(variant<Y<0>, Y<1>, Y<2>, Y<3>, Y<4>, Y<5> >&):
mov eax, DWORD PTR [rdi]
ret
h2(variant<Y<0>, Y<1>, Y<2>, Y<3>, Y<4>, Y<5> >&):
mov eax, DWORD PTR [rdi]
ret
h3(variant<Y<0>, Y<1>, Y<2>, Y<3>, Y<4>, Y<5> >&):
cmp DWORD PTR [rdi+4], 5
jbe .L15
.L15:
jmp f(X&)
h4(variant<Y<0>, Y<1>, Y<2>, Y<3>, Y<4>, Y<5> >&):
cmp DWORD PTR [rdi+4], 5
jbe .L19
.L19:
mov edi, DWORD PTR [rdi]
jmp g(int)
```
so the member access is folded in both cases (which is good!), even though the
first occurs through X& and the second through Y<I>&.
I've been unable to determine what makes the optimizations misfire. This code
should in principle be the same as the simplified one, but it isn't.
>From gcc-bugs-return-614634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 20:03:24 2018
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From: "bugdal at aerifal dot cx" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/87220] New: -fstack-check produces inefficient and wrong tests
Date: Tue, 04 Sep 2018 20:03:00 -0000
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Bug ID: 87220
Summary: -fstack-check produces inefficient and wrong tests
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Given the test case:
void bar(void *);
int foo()
{
char a[10];
bar(&a);
}
-fstack-check produces the code (x86_64; similar for 32-bit):
foo:
subq $4152, %rsp
orq $0, (%rsp)
addq $4128, %rsp
leaq 6(%rsp), %rdi
call bar
addq $24, %rsp
ret
This test:
1. Unnecessarily touches an extra page of stack that's not used, wasting
memory.
2. Skips over a whole page, potentially clobbering (data race) data on the
other side of a guard page.
3. Is completely unnecessary; since less than a page of stack is needed, only a
probe of the final desired stack pointer (after the third instruction) is
needed, and it's performed implicitly by the call.
I would expect at least:
foo:
subq $24, %rsp
orq $0, (%rsp)
leaq 6(%rsp), %rdi
call bar
addq $24, %rsp
ret
or ideally:
foo:
subq $24, %rsp
leaq 6(%rsp), %rdi
call bar
addq $24, %rsp
ret
The excessive stack usage, unsafety (jumping the guard page), and size and
potential performance hit from unnecessary checks seem to make -fstack-check
unsuitable for its intended purpose at this time.
>From gcc-bugs-return-614635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 20:07:42 2018
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Subject: [Bug other/87220] -fstack-check produces inefficient and wrong tests
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
What does -fstack-clash-protection give? (-fstack-check is an old option
for specific Ada requirements; for proper stack-clash protection for all
languages you want -fstack-clash-protection instead.)
>From gcc-bugs-return-614636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 20:20:42 2018
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Subject: [Bug other/87220] -fstack-check produces inefficient and wrong tests
Date: Tue, 04 Sep 2018 20:20:00 -0000
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--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> ---
-fstack-clash-protection works as desired.
Based on the documentation:
"Most targets do not fully support stack clash protection. However, on those
targets -fstack-clash-protection will protect dynamic stack allocations.
-fstack-clash-protection may also provide limited protection for static stack
allocations if the target supports -fstack-check=specific. "
I understood that -fstack-check would still be needed to get reliable
protection on all targets. Perhaps that's wrong. Is there a recommended
approach for determining at build time the right options for the target to
ensure that code which jumps over the guard page is not generated?
>From gcc-bugs-return-614637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 20:42:44 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
Date: Tue, 04 Sep 2018 20:42:00 -0000
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--- Comment #11 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 4 20:42:06 2018
New Revision: 264096
URL: https://gcc.gnu.org/viewcvs?rev=264096&root=gcc&view=rev
Log:
DWARF: Allow hard frame pointer even if frame pointer isn't used
r251028
commit cd557ff63f388ad27c376d0a225e74d3594a6f9d
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Aug 10 15:29:05 2017 +0000
i386: Don't use frame pointer without stack access
When there is no stack access, there is no need to use frame pointer
even if -fno-omit-frame-pointer is used and caller's frame pointer is
unchanged.
frame pointer may not be available even if -fno-omit-frame-pointer is
used. When this happened, arg pointer may be eliminated by hard frame
pointer. Since hard frame pointer is encoded with DW_OP_fbreg which
uses the DW_AT_frame_base attribute, not hard frame pointer directly,
we should allow hard frame pointer when generating DWARF info even if
frame pointer isn't used.
gcc/
PR debug/86593
* dwarf2out.c (based_loc_descr): Allow hard frame pointer even
if frame pointer isn't used.
(compute_frame_pointer_to_fb_displacement): Likewise.
gcc/testsuite/
PR debug/86593
* g++.dg/pr86593.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr86593.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
Date: Tue, 04 Sep 2018 20:43:00 -0000
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 9 so far.
>From gcc-bugs-return-614639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 04 23:14:14 2018
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Subject: [Bug bootstrap/86739] [9 Regression] Bootstrap broken with host GCC 4.1.2
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-04
CC| |egallager at gcc dot gnu.org
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
Iain confirmed this on IRC for darwin
>From gcc-bugs-return-614640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 02:42:59 2018
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Subject: [Bug c/87221] New: cannot build with -pie
Date: Wed, 05 Sep 2018 02:42:00 -0000
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Bug ID: 87221
Summary: cannot build with -pie
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With any example code,
> /usr/local/bin/gcc -pie -fpie test2.c
/usr/bin/ld: /usr/local/lib/gcc/x86_64-unknown-netbsd8.99/9.0.0/crtbegin.o:
relocation R_X86_64_32 against hidden symbol `__TMC_END__' can not be used when
making a shared object
/usr/bin/ld: /usr/local/lib/gcc/x86_64-unknown-netbsd8.99/9.0.0/crtend.o:
relocation R_X86_64_32 against `.ctors' can not be used when making a shared
object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
The following patch seems to help, but I don't know why the problem doesn't
affect more people:
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index 84738e76eaa..4906034555f 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -297,7 +297,7 @@ INTERNAL_CFLAGS = $(CFLAGS) $(LIBGCC2_CFLAGS)
$(HOST_LIBGCC2_CFLAGS) \
CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
$(NO_PIE_CFLAGS) -finhibit-size-directive -fno-inline -fno-exceptions \
-fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
- -fbuilding-libgcc -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
+ -fbuilding-libgcc -fPIC -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
$(INHIBIT_LIBC_CFLAGS)
# Extra flags to use when compiling crt{begin,end}.o.
>From gcc-bugs-return-614641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 03:26:17 2018
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Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
Date: Wed, 05 Sep 2018 03:26:00 -0000
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--- Comment #23 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #22)
> > The IPA SRA time is all spent in compute_fn_summary via convert_callers.
> > Not sure why that's necessary here? Martin, in r152368 you reduced those
> > to once-per-caller but obviously if each function calls each other function
> > as in this testcase this is still O(n^2). Why's the summary not simply
> > recomputed when we process the caller next? Thus at most N times?
>
> This is because summary needs to be ready for early inliner to decide whether
> caller is good for inlning or not. I think we can simply mark it as dirty
> and
> compute on demand from the inliner.
>
> I also have finally working patches for incremental update of inline summary
> in
> the IPA inliner.
>
Cool, looking forward to seeing those patches!
>From gcc-bugs-return-614642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 03:29:40 2018
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Subject: [Bug c++/66968] Incorrect template argument shown in diagnostic
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-614643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 04:30:05 2018
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Subject: [Bug target/87221] cannot build with -pie
Date: Wed, 05 Sep 2018 04:30:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is related to bug 81523. How did you configure GCC?
>From gcc-bugs-return-614644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 06:41:46 2018
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From: "mscfd at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87142] Aliasing issue with overloaded assignment and allocatable components
Date: Wed, 05 Sep 2018 06:41:00 -0000
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--- Comment #1 from martin <mscfd at gmx dot net> ---
The relevant passage from the standard is:
F2008, 12.4.3.4.3 (Defined assignments) says: "A defined assignment is treated
as a reference to the subroutine, with the left-hand side as the first argument
and the right-hand side enclosed in parentheses as the second argument."
The important part is the "enclosed in parentheses".
Please note that in most circumstances, the problem can only be seen in
valgrind. I have not been able to write a testcase, which consistently fails in
a simply visible manner. It all depends on the inner workings of the malloc
routines, whether the code works or segfaults or produces wrong results
(usually with control characters in the result).
>From gcc-bugs-return-614645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:16:14 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87219] [9 Regression] internal compiler error: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709
Date: Wed, 05 Sep 2018 07:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 87217 ***
>From gcc-bugs-return-614646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:16:15 2018
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87219 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/86706] [8 Regression] ICE in build_base_path, at cp/class.c:294
Date: Wed, 05 Sep 2018 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86706
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:16:15 2018
New Revision: 264103
URL: https://gcc.gnu.org/viewcvs?rev=264103&root=gcc&view=rev
Log:
Backported from mainline
2018-08-03 Jason Merrill <jason@redhat.com>
PR c++/86706
* class.c (build_base_path): Use currently_open_class.
* g++.dg/template/pr86706.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/template/pr86706.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/class.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Wed, 05 Sep 2018 07:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc, x86_64
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-05
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine obviously.
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Subject: [Bug c++/86738] [8 Regression] gcc 8.2: Internal compiler error memcpy
Date: Wed, 05 Sep 2018 07:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86738
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:19:27 2018
New Revision: 264104
URL: https://gcc.gnu.org/viewcvs?rev=264104&root=gcc&view=rev
Log:
Backported from mainline
2018-08-08 Jakub Jelinek <jakub@redhat.com>
PR c++/86738
* constexpr.c (cxx_eval_binary_expression): For arithmetics involving
NULL pointer set *non_constant_p to true.
(cxx_eval_component_reference): For dereferencing of a NULL pointer,
set *non_constant_p to true and return t.
* g++.dg/opt/pr86738.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/opt/pr86738.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/constexpr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86836] internal compiler error on structured bindings with shadow parameter on templated function
Date: Wed, 05 Sep 2018 07:21:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:20:31 2018
New Revision: 264105
URL: https://gcc.gnu.org/viewcvs?rev=264105&root=gcc&view=rev
Log:
Backported from mainline
2018-08-08 Jakub Jelinek <jakub@redhat.com>
PR c++/86836
* pt.c (tsubst_expr): For structured bindings, call tsubst_decomp_names
before tsubst_init, not after it.
* g++.dg/cpp1z/decomp46.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp1z/decomp46.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/86835] [8 Regression] Bogus "is used uninitialized" warning with -ffast-math
Date: Wed, 05 Sep 2018 07:21:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:21:15 2018
New Revision: 264106
URL: https://gcc.gnu.org/viewcvs?rev=264106&root=gcc&view=rev
Log:
Backported from mainline
2018-08-11 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/86835
* tree-ssa-math-opts.c (insert_reciprocals): Even when inserting
new_stmt after def_gsi, make sure to insert new_square_stmt after
that stmt, not 2 stmts before it.
* gcc.dg/pr86835.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr86835.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-math-opts.c
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Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
Date: Wed, 05 Sep 2018 07:22:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:22:07 2018
New Revision: 264107
URL: https://gcc.gnu.org/viewcvs?rev=264107&root=gcc&view=rev
Log:
Backported from mainline
2018-08-29 Jakub Jelinek <jakub@redhat.com>
PR c++/87095
* decl.c (begin_destructor_body): If current_class_type has
virtual bases and the primary base is nearly empty virtual base,
voidify clearing of vptr and make it conditional on in-charge
argument.
* g++.dg/ubsan/vptr-13.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ubsan/vptr-13.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
Date: Wed, 05 Sep 2018 07:23:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:23:00 2018
New Revision: 264108
URL: https://gcc.gnu.org/viewcvs?rev=264108&root=gcc&view=rev
Log:
Backported from mainline
2018-08-31 Jakub Jelinek <jakub@redhat.com>
PR middle-end/87138
* expmed.c (expand_mult_const): Use immed_wide_int_const instead of
gen_int_mode. Formatting fixes.
* gcc.target/i386/avx512bw-pr87138.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/avx512bw-pr87138.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/expmed.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
Date: Wed, 05 Sep 2018 07:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87198
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 5 07:23:45 2018
New Revision: 264109
URL: https://gcc.gnu.org/viewcvs?rev=264109&root=gcc&view=rev
Log:
Backported from mainline
2018-09-04 Jakub Jelinek <jakub@redhat.com>
PR target/87198
* common/config/i386/i386-common.c (OPTION_MASK_ISA_XSAVEOPT_SET,
OPTION_MASK_ISA_XSAVES_SET, OPTION_MASK_ISA_XSAVEC_SET): Use
OPTION_MASK_ISA_XSAVE_SET instead of OPTION_MASK_ISA_XSAVE.
(OPTION_MASK_ISA_XSAVE_UNSET): Add OPTION_MASK_ISA_XSAVES_UNSET
and OPTION_MASK_ISA_XSAVEC_UNSET.
* gcc.target/i386/pr87198.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr87198.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/common/config/i386/i386-common.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:25:33 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87142] Aliasing issue with overloaded assignment and allocatable components
Date: Wed, 05 Sep 2018 07:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87142
janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
CC| |janus at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to martin from comment #1)
> The important part is the "enclosed in parentheses".
... which means that the rhs is an expression that needs to be evaluated before
entering the assignment function.
So, this bug should probably be fixed by using a temporary for the rhs.
>From gcc-bugs-return-614656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:35:59 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Wed, 05 Sep 2018 07:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87217
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Somewhat reduced:
implicit real*8 (a-h,o-z)
common clop6(3),dps(6),aml6(6,6)
dimension y1(3)
dimension dclo(3)
dimension dx(3),dy(3)
save
do 80 ii=1,itco
y1(3)=dps(1)
do 40 l=1,3
dy(l)=clop6(l)-y1(l)
40 continue
dczp=abs(dy(3))
if(dcx.le.c1m10.and.dcz.le.c1m10.and.dcxp.le.c1m10.and.dczp
+ .le.c1m10.and.dcy.le.c1m10.and.dcyp.le.c1m10) goto 90
80 continue
write(6) itco
ii=itco
90 continue
if(ii.ne.itco) then
do 65 k=1,3
do 55 j=1,3
jj=2*j
kk=2*k
dclo(k)=aml6(kk-1,jj-1)*dx(j)+dclo(k)
dclo(k)=aml6(kk-1,jj)*dy(j)+dclo(k)
55 continue
65 continue
endif
end
>From gcc-bugs-return-614657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:38:31 2018
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Wed, 05 Sep 2018 07:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87217
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, yes. So it's picking up redundant loads defined in another loop. Not
walking outside of the region was supposed to prevent that but the
implementation was broken so I reverted it. Let me finally fix it then.
>From gcc-bugs-return-614658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:43:37 2018
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Subject: [Bug target/87222] New: ICE in setup_reg_classes, at reginfo.c:1027
Date: Wed, 05 Sep 2018 07:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87222
Bug ID: 87222
Summary: ICE in setup_reg_classes, at reginfo.c:1027
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: krebbel at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: s390x-linux-gnu
Following causes ICE:
$ /dev/shm/buildbot/install/gcc/bin/s390x-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr81715.C -march=z990 -c
during RTL pass: reload
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr81715.C: In function
‘void bar(int, int, int, S, int, int)’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr81715.C:36:1: internal
compiler error: in setup_reg_classes, at reginfo.c:1027
36 | }
| ^
0x576fd5 setup_reg_classes(int, reg_class, reg_class, reg_class)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/reginfo.c:1027
0x9c677b lra_change_class
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/lra-int.h:447
0x9c677b curr_insn_transform
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/lra-constraints.c:4182
0x9c7cc4 lra_constraints(bool)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/lra-constraints.c:4906
0x9b72c4 lra(_IO_FILE*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/lra.c:2446
0x9758a1 do_reload
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/ira.c:5469
0x9758a1 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/ira.c:5653
>From gcc-bugs-return-614659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:52:02 2018
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Subject: [Bug c++/86706] [8 Regression] ICE in build_base_path, at cp/class.c:294
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ too.
>From gcc-bugs-return-614660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:52:07 2018
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Subject: [Bug c++/86738] [8 Regression] gcc 8.2: Internal compiler error memcpy
Date: Wed, 05 Sep 2018 07:52:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ too.
>From gcc-bugs-return-614661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:52:18 2018
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From: "jens.maurer at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87223] New: -Os produces sub-optimal x86 machine code for initialization with zero
Date: Wed, 05 Sep 2018 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87223
Bug ID: 87223
Summary: -Os produces sub-optimal x86 machine code for
initialization with zero
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
Target Milestone: ---
My understanding of -Os is that it is aimed at reducing code size. It produces
code with suboptimal size for the constructor below (and similar cases where a
constructor needs to initialize lots of members to zero):
struct S {
char a = 0;
void * b = 0;
short c = 0;
long d = 0;
S();
};
S::S() = default;
Generated code on x86-64 using "g++ -Os -S x.cc":
movb $0, (%rdi)
movq $0, 8(%rdi)
movw $0, 16(%rdi)
movq $0, 24(%rdi)
ret
It would be more efficient space-wise to first zero a register with "xor %eax,
%eax" (should implicitly zero all of %rax) and then use %rax or a sub-register
thereof as the source for the moves. This avoids putting 0 as constants into
the machine instructions over and over again, enlarging their size (and, due to
their size, possibly clogging the CPU's instruction decoder).
>From gcc-bugs-return-614662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:53:05 2018
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Subject: [Bug target/87224] New: ICE in extract_constrain_insn, at recog.c:2206
Date: Wed, 05 Sep 2018 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87224
Bug ID: 87224
Summary: ICE in extract_constrain_insn, at recog.c:2206
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: powerpc64le-linux
Following causes ICE:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c
-O3 -ffloat-store
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c:
In function ‘extract_df_0_reg’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c:17:1:
error: insn does not satisfy its constraints:
17 | double extract_df_0_reg (vector double p) { return vec_extract (p, c0); }
| ^~~~~~
(insn 37 36 12 2 (set (reg:DF 9 9 [127])
(mem/c:DF (plus:DI (reg:DI 8 8 [136])
(reg:DI 7 7 [133])) [2 S8 A8]))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c":17
511 {*movdf_hardfloat64}
(expr_list:REG_DEAD (reg:DI 8 8 [136])
(expr_list:REG_DEAD (reg:DI 7 7 [133])
(nil))))
during RTL pass: cprop_hardreg
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c:17:1:
internal compiler error: in extract_constrain_insn, at recog.c:2206
0xf5f313 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:108
0xf5f373 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:118
0xf0872a extract_constrain_insn(rtx_insn*)
/home/marxin/Programming/gcc/gcc/recog.c:2206
0xf0f155 copyprop_hardreg_forward_1
/home/marxin/Programming/gcc/gcc/regcprop.c:801
0xf10c8b execute
/home/marxin/Programming/gcc/gcc/regcprop.c:1307
>From gcc-bugs-return-614663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:53:14 2018
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Subject: [Bug c++/86836] internal compiler error on structured bindings with shadow parameter on templated function
Date: Wed, 05 Sep 2018 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86836
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ too. As it is ice-on-invalid-code, not going to backport
further.
>From gcc-bugs-return-614664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:53:36 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86835] [8 Regression] Bogus "is used uninitialized" warning with -ffast-math
Date: Wed, 05 Sep 2018 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86835
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ too.
>From gcc-bugs-return-614668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:55:54 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87218] Extremely long compile time with 710 line Fortran code using -O2
Date: Wed, 05 Sep 2018 07:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
CC| |ebotcazou at gcc dot gnu.org,
| |law at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|middle-end |rtl-optimization
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
cfg cleanup : 487.98 ( 91%) 0.04 ( 9%) 503.57 ( 91%)
1045 kB ( 1%)
wow, that's interesting ;) With -ftime-report-details I can see
jump : 0.00 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
`- cfg cleanup :1238.28 ( 98%) 0.06 ( 21%)1238.60 ( 98%)
1045 kB ( 1%)
`- trivially dead code : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
so it's the RTL jump pass or what it creates that makes RTL CFG cleanup go
berserk. It does have this:
while (try_optimize_cfg (mode))
{
delete_unreachable_blocks (), changed = true;
if (!(mode & CLEANUP_NO_INSN_DEL))
{
/* Try to remove some trivially dead insns when doing an expensive
cleanup. But delete_trivially_dead_insns doesn't work after
reload (it only handles pseudos) and run_fast_dce is too costly
to run in every iteration.
For effective cross jumping, we really want to run a fast DCE to
clean up any dead conditions, or they get in the way of performing
useful tail merges.
Other transformations in cleanup_cfg are not so sensitive to dead
code, so delete_trivially_dead_insns or even doing nothing at all
is good enough. */
if ((mode & CLEANUP_EXPENSIVE) && !reload_completed
&& !delete_trivially_dead_insns (get_insns (), max_reg_num ()))
break;
if ((mode & CLEANUP_CROSSJUMP) && crossjumps_occurred)
run_fast_dce ();
}
else
break;
}
which does look like it may iterate quite a bit.
The caller is
3247 cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0)
3248 | (flag_thread_jumps ? CLEANUP_THREADING : 0));
and already the first try_optimize_cfg (mode) call above takes ages in
(gdb) fin
Run till exit from #0 thread_jump (e=0x7ffff65da5d0, b=0x7ffff68977b8)
at /space/rguenther/src/svn/gcc-8-branch/gcc/cfgcleanup.c:324
^C
323 /* First process all values computed in the source basic block. */
324 for (insn = NEXT_INSN (BB_HEAD (e->src));
325 insn != NEXT_INSN (BB_END (e->src));
326 insn = NEXT_INSN (insn))
327 if (INSN_P (insn))
328 cselib_process_insn (insn);
the basic-block is absolutely HUGE, the last insn has uid 125333.
(gdb) bt
#0 thread_jump (e=0x7ffff65da5d0, b=0x7ffff68977b8)
at /space/rguenther/src/svn/gcc-8-branch/gcc/cfgcleanup.c:324
#1 0x0000000001be2a1f in try_forward_edges (mode=41, b=0x7ffff68976e8)
at /space/rguenther/src/svn/gcc-8-branch/gcc/cfgcleanup.c:477
#2 0x0000000001be9a6a in try_optimize_cfg (mode=41)
at /space/rguenther/src/svn/gcc-8-branch/gcc/cfgcleanup.c:2942
#3 0x0000000001bea099 in cleanup_cfg (mode=41)
at /space/rguenther/src/svn/gcc-8-branch/gcc/cfgcleanup.c:3156
looks like we're using thread_jump for no good reason here?!
But this isn't code I'm in any way familiar with...
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Subject: [Bug middle-end/87138] [8/9 Regression] wrong code with TI multiplication with -O -march=k8 -fno-tree-fre -mavx512bw
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+.
>From gcc-bugs-return-614666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:55:14 2018
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Subject: [Bug sanitizer/87095] [8/9 Regression] UndefinedBehaviorSanitizer vptr false positive with virtual inheritance only with -fno-sanitize-recover
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+.
>From gcc-bugs-return-614667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 07:55:20 2018
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Subject: [Bug target/87198] ICE in extract_insn, at recog.c:2304
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.3+ so far.
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Subject: [Bug bootstrap/87225] New: tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87225
Bug ID: 87225
Summary: tree-vect-stmts.c:3748 error: converting to 'bool'
from 'std::nullptr_t' requires direct-initialization
[-fpermissive]
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: shane@time-travellers.org
Target Milestone: ---
The vectorizable_simd_clone_call() function returns a bool, but one return has
NULL which the compiler complains on, breaking the build.
The function declaration:
static bool
vectorizable_simd_clone_call (gimple *stmt, gimple_stmt_iterator *gsi,
gimple **vec_stmt, slp_tree slp_node)
{
The return in question:
unsigned HOST_WIDE_INT vf;
if (!LOOP_VINFO_VECT_FACTOR (loop_vinfo).is_constant (&vf))
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"not considering SIMD clones; not yet supported"
" for variable-width vectors.\n");
return NULL;
}
The error message:
In file included from
/home/shane/gcc-8.2.0/host-i386-unknown-openbsd6.3/prev-gcc/include-fixed/stddef.h:48,
from ../.././gcc/system.h:43,
from ../.././gcc/tree-vect-stmts.c:23:
../.././gcc/tree-vect-stmts.c: In function 'bool
vectorizable_simd_clone_call(gimple*, gimple_stmt_iterator*, gimple**,
slp_tree)':
../.././gcc/tree-vect-stmts.c:3748:14: error: converting to 'bool' from
'std::nullptr_t' requires direct-initialization [-fpermissive]
return NULL;
^~~~
This is on OpenBSD 6.3. My build process is:
* Install OpenBSD (all defaults).
* Run syspatch
* Install packages:
# pkg_add wget
# pkg_add gmp mpfr libmpc
# pkg_add gmake
* Get latest source and unpack:
$ wget
ftp://ftp.nluug.nl/mirror/languages/gcc/releases/gcc-8.2.0/gcc-8.2.0.tar.gz
$ tar xzf gcc-8.2.0.tar.gz
$ cd gcc-8.2.0
* Build:
$ ./configure --prefix=/opt/gcc-8.2.0 --with-gmp=/usr/local
--enable-languages=c,c++
$ gmake
It fails in stage2:
$ cat stage_current
stage2
I am curious how this build ever works at all on any system!
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87164] ICE in output_1236, at config/rs6000/vsx.md:3236
Date: Wed, 05 Sep 2018 08:09:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Sep 5 08:07:48 2018
New Revision: 264111
URL: https://gcc.gnu.org/viewcvs?rev=264111&root=gcc&view=rev
Log:
Ignore properly -mdirect-move (PR target/87164).
2018-09-05 Martin Liska <mliska@suse.cz>
PR target/87164
* config/rs6000/rs6000.opt: Mark the option as Deprecated.
* optc-gen.awk: Allow 'Var' for Deprecated options in order
to generate a MASK value.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.opt
trunk/gcc/optc-gen.awk
>From gcc-bugs-return-614671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 08:35:22 2018
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Subject: [Bug target/87164] ICE in output_1236, at config/rs6000/vsx.md:3236
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 08:37:50 2018
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From: "faithandbrave at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87226] New: doesn't work std::filesystem::directory_options::follow_directory_symlink
Date: Wed, 05 Sep 2018 08:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87226
Bug ID: 87226
Summary: doesn't work
std::filesystem::directory_options::follow_directory_s
ymlink
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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#include <iostream>
#include <filesystem>
#include <fstream>
namespace fs = std::filesystem;
int main()
{
fs::create_directory("dir_a");
std::ofstream{"dir_a/a.txt"};
fs::create_directory("dir_b");
std::ofstream{"dir_b/b.txt"};
fs::create_directory_symlink("dir_a", "dir_b/dir_a");
for (const fs::directory_entry& x : fs::recursive_directory_iterator(
"dir_b",
fs::directory_options::follow_directory_symlink)) {
std::cout << x.path() << std::endl;
}
}
expected result:
"dir_b/b.txt"
"dir_b/dir_a"
"dir_b/dir_a/a.txt"
actual result:
"dir_b/b.txt"
"dir_b/dir_a"
>From gcc-bugs-return-614673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 08:44:00 2018
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Subject: [Bug libstdc++/87227] New: doesn't work std::filesystem::directory_options::follow_directory_symlink
Date: Wed, 05 Sep 2018 08:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87227
Bug ID: 87227
Summary: doesn't work
std::filesystem::directory_options::follow_directory_s
ymlink
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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#include <iostream>
#include <filesystem>
#include <fstream>
namespace fs = std::filesystem;
int main()
{
fs::create_directory("dir_a");
std::ofstream{"dir_a/a.txt"};
fs::create_directory("dir_b");
std::ofstream{"dir_b/b.txt"};
fs::create_directory_symlink("dir_a", "dir_b/dir_a");
for (const fs::directory_entry& x : fs::recursive_directory_iterator(
"dir_b",
fs::directory_options::follow_directory_symlink)) {
std::cout << x.path() << std::endl;
}
}
expected result:
"dir_b/b.txt"
"dir_b/dir_a"
"dir_b/dir_a/a.txt"
actual result:
"dir_b/b.txt"
"dir_b/dir_a"
>From gcc-bugs-return-614674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 08:55:13 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 08:55:00 -0000
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--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
gcc61.fsffrance.org unfortunately seems inaccessible, can you post
-fdump-tree-esra-details dump here together with the preceeding tree
dump file?
I cannot see anything wrong with the dump excerpt that you posted
above. SRA saw a structure that is not addressable and with only
local uses and decided to scalarize it, the pointer is now in SR.13_3
and all accesses to __pfn should be replaced with that. The
comparison is converted.
If the *type* of D.43111 is somehow special in a way that is
undetectable to a tree pass, it (again, the type) should have
TREE_ADDRESSABLE set.
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Subject: [Bug libstdc++/87226] doesn't work std::filesystem::directory_options::follow_directory_symlink
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 87227 has been marked as a duplicate of this bug. ***
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Subject: [Bug libstdc++/87227] doesn't work std::filesystem::directory_options::follow_directory_symlink
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 87226 ***
>From gcc-bugs-return-614677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 09:08:49 2018
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Subject: [Bug testsuite/87216] FAIL: gcc.dg/tree-prof/pr59521-3.c scan-assembler \\nfoo:\\n.*cmp.*1,.*cmp.*10,.*cmp.*100 on darwin
Date: Wed, 05 Sep 2018 09:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87216
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Sep 5 09:08:07 2018
New Revision: 264113
URL: https://gcc.gnu.org/viewcvs?rev=264113&root=gcc&view=rev
Log:
Fix a scan in test for Darwin target (PR testsuite/87216).
2018-09-05 Martin Liska <mliska@suse.cz>
PR testsuite/87216
* gcc.dg/tree-prof/pr59521-3.c: Update scanned pattern
to support Dawring names.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-prof/pr59521-3.c
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Subject: [Bug testsuite/87216] FAIL: gcc.dg/tree-prof/pr59521-3.c scan-assembler \\nfoo:\\n.*cmp.*1,.*cmp.*10,.*cmp.*100 on darwin
Date: Wed, 05 Sep 2018 09:10:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
Date: Wed, 05 Sep 2018 09:17:00 -0000
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--- Comment #6 from Wen Yang <yellowriver2010 at hotmail dot com> ---
We may simply construct this error scenario：
#
/var/weny/release_gcc_trunk/usr/local/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/cc1
-fdump-passes -fgnu-tm applets.i
This section of code has a bug：
static bool
gate_tm_init (void)
{
if (!flag_tm)
return false;
calculate_dominance_info (CDI_DOMINATORS); ---》cfun may be NULL.
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Subject: [Bug c++/60336] empty struct value is passed differently in C and C++
Date: Wed, 05 Sep 2018 09:33:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
--- Comment #53 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a pure C++ testcase that gives the wrong answer in GCC 7, presumably
because libc's vsnprintf is expecting the C calling convention.
struct foo { };
char buf[128];
int MySnprintf(struct foo, const char *pFormat, ...)
{
__builtin_va_list arguments;
__builtin_va_start(arguments, pFormat);
__builtin_vsnprintf(buf, sizeof(buf), pFormat, arguments);
__builtin_va_end(arguments);
return 0;
}
int main(void) {
struct foo blah;
MySnprintf(blah, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", 1, 2, 3, 4, 5, 6, 7, 8, 9,
10);
__builtin_puts(buf);
}
GCC 7 prints:
1:2:3:4:5:4195847:6:7:8:9
GCC 8.1.0 prints:
1:2:3:4:5:6:7:8:9:10
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Subject: [Bug bootstrap/87225] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
Date: Wed, 05 Sep 2018 09:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-05
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Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
That means you're using clang as host compiler. Will fix.
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Subject: [Bug c++/60336] empty struct value is passed differently in C and C++
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--- Comment #54 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh, and for completeness, GCC 8.1.0 -fabi-version=11 also prints a garbage
value of course:
1:2:3:4:5:4195842:6:7:8:9
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Subject: [Bug bootstrap/87225] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 5 09:39:34 2018
New Revision: 264116
URL: https://gcc.gnu.org/viewcvs?rev=264116&root=gcc&view=rev
Log:
2018-09-05 Richard Biener <rguenther@suse.de>
PR bootstrap/87225
* tree-vect-stmts.c (vectorizable_simd_clone_call): Fix bogus
return.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug bootstrap/87225] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 5 09:40:35 2018
New Revision: 264117
URL: https://gcc.gnu.org/viewcvs?rev=264117&root=gcc&view=rev
Log:
2018-09-05 Richard Biener <rguenther@suse.de>
PR bootstrap/87225
* tree-vect-stmts.c (vectorizable_simd_clone_call): Fix bogus
return.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/tree-vect-stmts.c
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Subject: [Bug bootstrap/87225] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87225] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
Date: Wed, 05 Sep 2018 09:43:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Shane Kerr from comment #0)
> I am curious how this build ever works at all on any system!
Because on most systems NULL is defined to 0 not std::nullptr_t and 0 can be
implicitly converted to bool.
>From gcc-bugs-return-614687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 09:49:10 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87223] -Os produces sub-optimal x86 machine code for initialization with zero
Date: Wed, 05 Sep 2018 09:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
CC| |vmakarov at gcc dot gnu.org
Component|c++ |target
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I believe there are duplicates for this and I believe this
optimization would be beneficial for -O2+ as well. Note that with -O2 we
generate
xorl %eax, %eax
movb $0, (%rdi)
movq $0, 8(%rdi)
movw %ax, 16(%rdi)
movq $0, 24(%rdi)
ret
the movw variant is generated by peephole2.
I suppose LRA could be the place to "remat" constants.
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Subject: [Bug libstdc++/87226] doesn't work std::filesystem::directory_options::follow_directory_symlink
Date: Wed, 05 Sep 2018 09:52:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Akira Takahashi from comment #0)
> #include <iostream>
> #include <filesystem>
> #include <fstream>
>
> namespace fs = std::filesystem;
>
> int main()
> {
> fs::create_directory("dir_a");
> std::ofstream{"dir_a/a.txt"};
>
> fs::create_directory("dir_b");
> std::ofstream{"dir_b/b.txt"};
> fs::create_directory_symlink("dir_a", "dir_b/dir_a");
This creates a symlink in dir_b that points to itself.
> for (const fs::directory_entry& x : fs::recursive_directory_iterator(
> "dir_b",
>
> fs::directory_options::follow_directory_symlink)) {
> std::cout << x.path() << std::endl;
> }
> }
>
> expected result:
> "dir_b/b.txt"
> "dir_b/dir_a"
> "dir_b/dir_a/a.txt"
No, because you've created a broken symlink. dir_b/dir_a cannot be followed.
You can confirm that with /bin/ls
$ /bin/ls -R -1 dir_b
dir_b:
b.txt dir_a
Which matches your results:
>
> actual result:
> "dir_b/b.txt"
> "dir_b/dir_a"
You probably meant to do:
fs::create_directory_symlink("../dir_a", "dir_b/dir_a");
Then the result is:
"dir_b/dir_a"
"dir_b/dir_a/a.txt"
"dir_b/b.txt"
>From gcc-bugs-return-614689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 09:58:41 2018
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Subject: [Bug target/87221] cannot build with -pie
Date: Wed, 05 Sep 2018 09:58:00 -0000
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--- Comment #2 from coypu <coypu at sdf dot org> ---
(In reply to Andrew Pinski from comment #1)
> This is related to bug 81523. How did you configure GCC?
Configured with nothing related to default pie:
export ac_cv_func_freelocale=no
export ac_cv_func_newlocale=no
export ac_cv_func_uselocale=no
./configure --disable-nls --with-system-zlib MAKEINFO=/usr/pkg/bin/makeinfo
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Subject: [Bug c++/87185] ICE in prune_lambda_captures()
Date: Wed, 05 Sep 2018 09:59:00 -0000
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Sep 5 09:59:08 2018
New Revision: 264118
URL: https://gcc.gnu.org/viewcvs?rev=264118&root=gcc&view=rev
Log:
[PR c++/87185] ICE in prune-lambdas
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00249.html
cp/
PR c++/87185
* lambda.c (prune_lambda_captures): Protect against const_vars.get
returning NULL.
testsuite/
PR c++/87185
* g++.dg/pr87185.C: New.
Added:
trunk/gcc/testsuite/g++.dg/pr87185.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/lambda.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 10:01:17 2018
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Subject: [Bug c++/87185] [8/9 Regression] ICE in prune_lambda_captures()
Date: Wed, 05 Sep 2018 10:01:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ICE in |[8/9 Regression] ICE in
|prune_lambda_captures() |prune_lambda_captures()
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Applied to trunk r264118.
>From gcc-bugs-return-614692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 10:05:35 2018
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 05 Sep 2018 10:05:00 -0000
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--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Sep 5 10:04:58 2018
New Revision: 264119
URL: https://gcc.gnu.org/viewcvs?rev=264119&root=gcc&view=rev
Log:
PR c++/87137] GCC-8 Fix
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01966.html
PR c++/87137
* stor-layout.c (place_field): Scan forwards to check last
bitfield when ms_bitfield_placement is in effect.
gcc/testsuite/
* g++.dg/abi/pr87137.C: New.
Added:
trunk/gcc/testsuite/g++.dg/abi/pr87137.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/stor-layout.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86505] [6/7 Regression] __builtin_va_arg_pack_len() computes the number of arguments wrongly
Date: Wed, 05 Sep 2018 10:05:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to rpirrera from comment #9)
> The patch cannot be applied to the compiler we are using (GCC 5), we get a
> function not defined error.
> Is it possible to have a patch for GCC 5 too?
>
> Thank you.
you should be able to replace
+ tree newlhs = create_tmp_reg_or_ssa_name (integer_type_node);
with inlining the implementation that is in newer GCC:
tree
create_tmp_reg_or_ssa_name (tree type, gimple *stmt)
{
if (gimple_in_ssa_p (cfun))
return make_ssa_name (type, stmt);
else
return create_tmp_reg (type);
}
Note that GCC 5 is out of support.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 05 Sep 2018 10:18:00 -0000
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--- Comment #12 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed trunk r264119
>From gcc-bugs-return-614695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 10:32:21 2018
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Subject: [Bug middle-end/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
Date: Wed, 05 Sep 2018 10:32:00 -0000
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--- Comment #7 from Wen Yang <yellowriver2010 at hotmail dot com> ---
This patch will make it more robust:
# git diff
diff --git a/gcc/trans-mem.c b/gcc/trans-mem.c
index 1d4eb80..326e1c4 100644
--- a/gcc/trans-mem.c
+++ b/gcc/trans-mem.c
@@ -2099,6 +2099,9 @@ gate_tm_init (void)
if (!flag_tm)
return false;
+ if (!cfun->cfg)
+ return false;
+
calculate_dominance_info (CDI_DOMINATORS);
bitmap_obstack_initialize (&tm_obstack);
>From gcc-bugs-return-614696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 10:33:54 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Wed, 05 Sep 2018 10:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/87217] [9 regression] ICE in in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709 when compiling SPEC2000 starting with r264069
Date: Wed, 05 Sep 2018 10:34:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 5 10:33:41 2018
New Revision: 264121
URL: https://gcc.gnu.org/viewcvs?rev=264121&root=gcc&view=rev
Log:
2018-09-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/87217
* tree-ssa-sccvn.c (vuse_valueize): New.
(vn_reference_lookup_pieces): Use it.
(vn_reference_lookup): Likewise.
* gfortran.dg/pr87217.f: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr87217.f
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Wed, 05 Sep 2018 10:34:00 -0000
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--- Comment #20 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #18)
> +#ifdef __hpux
> + if (__len == -1)
> + return __s;
> +#endif
N.B. I really don't want to just abort here, nor assume that __len is valid,
and then continue onwards with undefined behaviour. But I don't think this
function has any way to report an error. Maybe it should throw an exception
instead.
It also occurs to me that in some cases we could reuse the original alloca
result for the final output string instead of doing yet another alloca, e.g. if
we alloca(5000) and find __len is less than (5000 / sizeof(wchar_t)) then we
could reuse it. Or maybe beyond a certain size we should switch to the heap.
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 05 Sep 2018 10:43:00 -0000
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--- Comment #14 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Sep 5 10:42:59 2018
New Revision: 264123
URL: https://gcc.gnu.org/viewcvs?rev=264123&root=gcc&view=rev
Log:
[PR c++/87137] GCC-8 Fix
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01966.html
PR c++/87137
* stor-layout.c (place_field): Scan forwards to check last
bitfield when ms_bitfield_placement is in effect.
gcc/testsuite/
* g++.dg/abi/pr87137.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/abi/pr87137.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/stor-layout.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Wed, 05 Sep 2018 10:43:00 -0000
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--- Comment #13 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed gcc-8 r264123.
changes.html remains to do
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87224] ICE in extract_constrain_insn, at recog.c:2206
Date: Wed, 05 Sep 2018 11:23:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64le-linux |powerpc*-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
Host|x86_64-linux-gnu |
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Needs -ffloat-store -mcpu=power8 and -O1 or higher. Confirmed.
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Peter Dimov from comment #8)
> (In reply to Martin Liška from comment #7)
> > I'm not sure here Y<N> are different types here and member access based on
> > the type is distinct.
>
> Yes, one could argue that, I suppose. But in the `return ((Y<0>*)p)->v;`
> case the member access _is_ lifted outside the jump table. If that's correct
> there, it should also be correct here. :-)
Yes, it's hoisted out (lifted). But it happens very late in optimization
pipeline, that's why we create first jump table and later we isolate the
expression.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87228] New: num_put::_M_insert_float uses stack inefficiently
Date: Wed, 05 Sep 2018 11:27:00 -0000
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Bug ID: 87228
Summary: num_put::_M_insert_float uses stack inefficiently
Product: gcc
Version: 9.0
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This function uses alloca to get an initial buffer with a fairly conservative
size, then uses alloca between 1 and 3 more times for the final result.
We do all the work of formatting the string, then right at the end check if we
need to pad to a larger width, and then do another alloca. We know the width
upfront, so could make sure the first alloca has at least that much space.
We should also avoid trying to alloca something ridiculous when a huge width
has been given. This segfaults with a ulimit -s of 8192 kb
#include <iostream>
#include <iomanip>
#include <limits>
int main()
{
std::cout << std::setw(8192 * 1024 + 1) << std::fixed
<< std::numeric_limits<long double>::max();
}
The function should probably switch to the heap in such cases.
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Sep 5 11:28:49 2018
New Revision: 264124
URL: https://gcc.gnu.org/viewcvs?rev=264124&root=gcc&view=rev
Log:
Group switch cases in switch lowering (PR tree-optimization/87205).
2018-09-05 Martin Liska <mliska@suse.cz>
PR tree-optimization/87205
* tree-switch-conversion.c (pass_lower_switch::execute):
Group cases for switch statements.
2018-09-05 Martin Liska <mliska@suse.cz>
PR tree-optimization/87205
* gcc.dg/tree-ssa/pr87205-2.c: New test.
* gcc.dg/tree-ssa/pr87205.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr87205-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr87205.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-switch-conversion.c
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Subject: [Bug target/87224] ICE in extract_constrain_insn, at recog.c:2206
Date: Wed, 05 Sep 2018 11:31:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The *mov<FMOVE64>_hardfloat64 pattern has constraint Y without also having Z.
Patch in testing.
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Subject: [Bug tree-optimization/87205] Inefficient code generation for switch
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
I fixed the basic problematic, please open a separate for the tricky C++
issues..
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 5 11:44:13 2018
New Revision: 264125
URL: https://gcc.gnu.org/viewcvs?rev=264125&root=gcc&view=rev
Log:
2018-09-05 Richard Biener <rguenther@suse.de>
PR bootstrap/87134
* tree-ssa-sccvn.c (rpo_elim::eliminate_push_avail): Make sure
to zero-init the emplaced vec.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 05 Sep 2018 11:46:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
So I've applied a patch that might fix the originally reported segfault.
>From gcc-bugs-return-614709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 11:57:12 2018
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From: "v at vsamko dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87229] New: ICE: tree code 'call_expr' is not supported in LTO streams
Date: Wed, 05 Sep 2018 11:57:00 -0000
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Bug ID: 87229
Summary: ICE: tree code 'call_expr' is not supported in LTO
streams
Product: gcc
Version: 8.2.0
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This works fine with gcc 7 and ealier. Gcc 8 and trunk have this problem.
Compiling with "-flto"
===
struct Main { Main(char* x); };
Main::Main(char* x) {
char cfg[__builtin_strlen(x)];
}
===
Result:
===
during IPA pass: fnsummary
<source>: In member function 'Main::Main(char*)':
<source>:5:1: internal compiler error: tree code 'call_expr' is not supported
in LTO streams
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
===
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 12:02:00 -0000
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--- Comment #7 from dave.anglin at bell dot net ---
On 2018-09-05 4:55 AM, jamborm at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
>
> --- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
> gcc61.fsffrance.org unfortunately seems inaccessible, can you post
> -fdump-tree-esra-details dump here together with the preceeding tree
> dump file?
Attached.
>
> I cannot see anything wrong with the dump excerpt that you posted
> above. SRA saw a structure that is not addressable and with only
> local uses and decided to scalarize it, the pointer is now in SR.13_3
> and all accesses to __pfn should be replaced with that. The
> comparison is converted.
Is the fact that _pfn was a pointer to a function retained in SR.13_3?Â
If not, then the transformation
needs to be disabled when
targetm.have_canonicalize_funcptr_for_compare() is true. Alternatively,
the type of SR.13_3 could be made the same as __pfn.
>
> If the *type* of D.43111 is somehow special in a way that is
> undetectable to a tree pass, it (again, the type) should have
> TREE_ADDRESSABLE set.
I don't think the type of D.43111 is special other than it contains a
field that is a function pointer.
Dave
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From: "david.bolvansky at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87230] New: GCC should warn if [[fallthrough]] is used in the last case in a switch
Date: Wed, 05 Sep 2018 12:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87230
Bug ID: 87230
Summary: GCC should warn if [[fallthrough]] is used in the last
case in a switch
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: david.bolvansky at gmail dot com
Target Milestone: ---
void f(int n) {
void g(), h(), i();
switch (n) {
case 1:
case 2:
g();
[[fallthrough]];
case 3: // no warning on fallthrough
h();
case 4: // compiler may warn on fallthrough
if(n < 3) {
i();
[[fallthrough]]; // OK
}
else {
return;
}
case 5:
[[fallthrough]]; // ill-formed, no subsequent case or default label
}
}
gcc -O3 -std=c++17 -Wall -Werror -> no errors
clang -O3 -std=c++17 -Wall -Werror ->
<source>:24:7: error: fallthrough annotation does not directly precede switch
label
[[fallthrough]]; // ill-formed, no subsequent case or default label
^
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Subject: [Bug bootstrap/87225] [8/9 Regression] tree-vect-stmts.c:3748 error: converting to 'bool' from 'std::nullptr_t' requires direct-initialization [-fpermissive]
Date: Wed, 05 Sep 2018 12:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|tree-vect-stmts.c:3748 |[8/9 Regression]
|error: converting to 'bool' |tree-vect-stmts.c:3748
|from 'std::nullptr_t' |error: converting to 'bool'
|requires |from 'std::nullptr_t'
|direct-initialization |requires
|[-fpermissive] |direct-initialization
| |[-fpermissive]
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Introduced in r256126 btw.
>From gcc-bugs-return-614713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 12:06:20 2018
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Subject: [Bug tree-optimization/87184] generic-match.c:55076:1: ICE: Segmentation fault
Date: Wed, 05 Sep 2018 12:06:00 -0000
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
r263931 introduced the problem.
Unfortunately, I don't get a core dump and the behavior is different in build
at -j2.
>From gcc-bugs-return-614714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 12:07:58 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Wed, 05 Sep 2018 12:07:00 -0000
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--- Comment #21 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This should never fail:
--- a/libstdc++-v3/include/bits/locale_facets.tcc
+++ b/libstdc++-v3/include/bits/locale_facets.tcc
@@ -1000,7 +1000,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
// First try a buffer perhaps big enough (most probably sufficient
// for non-ios_base::fixed outputs)
int __cs_size = __max_digits * 3;
- char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
+ char* __cs;
+
+__retry_convert_from_v:
+
+ __cs = static_cast<char*>(__builtin_alloca(__cs_size));
if (__use_prec)
__len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
__fbuf, __prec, __v);
@@ -1020,6 +1024,15 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
__len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
__fbuf, __v);
}
+ else if (__builtin_expect(__len == -1, false))
+ {
+ const bool __fixed = __io.flags() & ios_base::fixed;
+ const int __max_exp =
+ __gnu_cxx::__numeric_traits<_ValueT>::__max_exponent10;
+ __cs_size = __fixed ? __max_exp + __prec + 4
+ : __max_digits * 2 + __prec;
+ goto __retry_convert_from_v;
+ }
#else
// Consider the possibility of long ios_base::fixed outputs
const bool __fixed = __io.flags() & ios_base::fixed;
Another option is to simply define _GLIBCXX_BROKEN_VSNPRINTF in
config/os/hpux/os_defines.h and then force the use of vsprintf, which is always
called with a large enough buffer:
diff --git a/libstdc++-v3/config/locale/generic/c_locale.h
b/libstdc++-v3/config/locale/generic/c_locale.h
index 0d208166063..3045931c840 100644
--- a/libstdc++-v3/config/locale/generic/c_locale.h
+++ b/libstdc++-v3/config/locale/generic/c_locale.h
@@ -70,7 +70,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__builtin_va_list __args;
__builtin_va_start(__args, __fmt);
-#if _GLIBCXX_USE_C99_STDIO
+#if _GLIBCXX_USE_C99_STDIO && !_GLIBCXX_HAVE_BROKEN_VSNPRINTF
const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
#else
const int __ret = __builtin_vsprintf(__out, __fmt, __args);
diff --git a/libstdc++-v3/config/os/hpux/os_defines.h
b/libstdc++-v3/config/os/hpux/os_defines.h
index 1003477fe35..5a9c4faf75d 100644
--- a/libstdc++-v3/config/os/hpux/os_defines.h
+++ b/libstdc++-v3/config/os/hpux/os_defines.h
@@ -109,4 +109,9 @@ typedef long int __padding_type;
#if defined (__hppa__)
#define _GLIBCXX_HAVE_BROKEN_STRTOLD 1
#endif
+
+// The vnsprintf function returns -1 when the buffer is too small.
+// See PR libstdc++/68737.
+#define _GLIBCXX_HAVE_BROKEN_VSNPRINTF 1
+
#endif
diff --git a/libstdc++-v3/include/bits/locale_facets.tcc
b/libstdc++-v3/include/bits/locale_facets.tcc
index 39da5766075..d5fa91e97d6 100644
--- a/libstdc++-v3/include/bits/locale_facets.tcc
+++ b/libstdc++-v3/include/bits/locale_facets.tcc
@@ -992,7 +992,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
char __fbuf[16];
__num_base::_S_format_float(__io, __fbuf, __mod);
-#if _GLIBCXX_USE_C99_STDIO
+#if _GLIBCXX_USE_C99_STDIO && !_GLIBCXX_HAVE_BROKEN_VSNPRINTF
// Precision is always used except for hexfloat format.
const bool __use_prec =
(__io.flags() & ios_base::floatfield) != ios_base::floatfield;
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 05 Sep 2018 12:23:00 -0000
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--- Comment #12 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
> So I've applied a patch that might fix the originally reported segfault.
It doesn't help unfortunately: I'm still seeing SEGVs on both
i386-pc-solaris2.11
+===========================GNAT BUG DETECTED==============================+
| 9.0.0 20180905 (experimental) [trunk revision 264125] (i386-pc-solaris2.11)
GCC error:|
| in df_bb_refs_record, at df-scan.c:3342 |
| Error detected around
/vol/gcc/src/hg/trunk/local/gcc/ada/sem_prag.adb:24943:8|
raised CONSTRAINT_ERROR : SIGSEGV
(which goes away if repeating the compilation manually) and
0x9797fc8 crash_signal
/vol/gcc/src/hg/trunk/local/gcc/toplev.c:325
0x99c859a get_expr_value_id
/vol/gcc/src/hg/trunk/local/gcc/tree-ssa-pre.c:657
0x99c8bce bitmap_value_insert_into_set
/vol/gcc/src/hg/trunk/local/gcc/tree-ssa-pre.c:886
0x99cff53 compute_avail
/vol/gcc/src/hg/trunk/local/gcc/tree-ssa-pre.c:3845
0x99d0e3e execute
/vol/gcc/src/hg/trunk/local/gcc/tree-ssa-pre.c:4213
building cse.o.
On sparc-sun-solaris2.11, I get
0x16a0857 crash_signal
/vol/gcc/src/hg/trunk/local/gcc/toplev.c:325
make[3]: *** [Makefile:1111: ipa-inline-transform.o] Error 1
>From gcc-bugs-return-614716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 12:26:44 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87229] [8/9 Regression] ICE: tree code 'call_expr' is not supported in LTO streams
Date: Wed, 05 Sep 2018 12:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
CC| |hubicka at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|ICE: tree code 'call_expr' |[8/9 Regression] ICE: tree
|is not supported in LTO |code 'call_expr' is not
|streams |supported in LTO streams
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. DECL_SIZE[_UNIT] of cfg referenced by DECL_ABSTRACT_ORIGIN isn't
properly gimplified.
In GCC7 we didn't stream DECL_ABSTRACT_ORIGIN.
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to dave.anglin from comment #7)
> On 2018-09-05 4:55 AM, jamborm at gcc dot gnu.org wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
> >
> > --- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
> > I cannot see anything wrong with the dump excerpt that you posted
> > above. SRA saw a structure that is not addressable and with only
> > local uses and decided to scalarize it, the pointer is now in SR.13_3
> > and all accesses to __pfn should be replaced with that. The
> > comparison is converted.
> Is the fact that _pfn was a pointer to a function retained in SR.13_3?Â
Yes, the dump says:
bool SV::<T4394> (const struct SV *, const struct SV &) * SR.13;
which looks exactly like the type in the structure.
> > If the *type* of D.43111 is somehow special in a way that is
> > undetectable to a tree pass, it (again, the type) should have
> > TREE_ADDRESSABLE set.
> I don't think the type of D.43111 is special other than it contains a
> field that is a function pointer.
>
Then I believe SRA is not the culprit, you probably need to trace what
happens to SR.13 afterwards and whether it is correctly expanded to
RTL.
>From gcc-bugs-return-614718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 13:07:00 2018
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From: "coypu at sdf dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87221] cannot build with -pie
Date: Wed, 05 Sep 2018 13:06:00 -0000
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--- Comment #3 from coypu <coypu at sdf dot org> ---
I think the change in bug 81523 to make -static imply no PIE might be wrong, as
static PIE is a thing.
It might be more right to limit that change only for configurations that don't
support static PIE.
>From gcc-bugs-return-614719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 13:18:18 2018
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Subject: [Bug libstdc++/87228] num_put::_M_insert_float uses stack inefficiently
Date: Wed, 05 Sep 2018 13:18:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If the widening, grouping and padding was done in one pass it would only need
two allocations (one for the narrow character string and one for the wide
character result). That would reduce the memory usage and reduce the number of
times the buffers are copied.
>From gcc-bugs-return-614720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 13:25:51 2018
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Subject: [Bug c++/87230] GCC should warn if [[fallthrough]] is used in the last case in a switch
Date: Wed, 05 Sep 2018 13:25:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 87068 ***
>From gcc-bugs-return-614721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 13:25:52 2018
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Subject: [Bug c++/87068] No diagnostic on an ill-formed [[fallthrough]]
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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CC| |david.bolvansky at gmail dot com
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 87230 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 13:28:40 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 13:28:00 -0000
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--- Comment #9 from dave.anglin at bell dot net ---
On 2018-09-05 8:50 AM, jamborm at gcc dot gnu.org wrote:
> Then I believe SRA is not the culprit, you probably need to trace what
> happens to SR.13 afterwards and whether it is correctly expanded to
> RTL.
Okay. I know the expansion to RTL is wrong.
>From gcc-bugs-return-614723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 14:05:29 2018
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From: "shane@time-travellers.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87231] New: stdatomic.h: No such file or directory on OpenBSD 6.3
Date: Wed, 05 Sep 2018 14:05:00 -0000
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Bug ID: 87231
Summary: stdatomic.h: No such file or directory on OpenBSD 6.3
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: shane@time-travellers.org
Target Milestone: ---
Trying to build gcc 8.2.0 on OpenBSD 6.3 fails in stage 3.
(Note that the patch in bug 87225 is required to get to this failure.)
The error message:
/bin/sh ./libtool --tag=CC --mode=compile
/home/shane/gcc-8.2.0/host-i386-unknown-openbsd6.3/gcc/xgcc
-B/home/shane/gcc-8.2.0/host-i386-unknown-openbsd6.3/gcc/
-B/opt/gcc-8.2.0/i386-unknown-openbsd6.3/bin/
-B/opt/gcc-8.2.0/i386-unknown-openbsd6.3/lib/ -isystem
/opt/gcc-8.2.0/i386-unknown-openbsd6.3/include -isystem
/opt/gcc-8.2.0/i386-unknown-openbsd6.3/sys-include -DHAVE_CONFIG_H
-I../.././libatomic/config/x86 -I../.././libatomic/config/posix
-I../.././libatomic -I. -march=i486 -mtune=i386 -fomit-frame-pointer -Wall
-Werror -pthread -g -O2 -MT fence.lo -MD -MP -MF .deps/fence.Tpo -c -o
fence.lo ../.././libatomic/fence.c
libtool: compile: /home/shane/gcc-8.2.0/host-i386-unknown-openbsd6.3/gcc/xgcc
-B/home/shane/gcc-8.2.0/host-i386-unknown-openbsd6.3/gcc/
-B/opt/gcc-8.2.0/i386-unknown-openbsd6.3/bin/
-B/opt/gcc-8.2.0/i386-unknown-openbsd6.3/lib/ -isystem
/opt/gcc-8.2.0/i386-unknown-openbsd6.3/include -isystem
/opt/gcc-8.2.0/i386-unknown-openbsd6.3/sys-include -DHAVE_CONFIG_H
-I../.././libatomic/config/x86 -I../.././libatomic/config/posix
-I../.././libatomic -I. -march=i486 -mtune=i386 -fomit-frame-pointer -Wall
-Werror -pthread -g -O2 -MT fence.lo -MD -MP -MF .deps/fence.Tpo -c
../.././libatomic/fence.c -fPIC -DPIC -o .libs/fence.o
../.././libatomic/fence.c:26:10: fatal error: stdatomic.h: No such file or
directory
#include <stdatomic.h>
^~~~~~~~~~~~~
compilation terminated.
My build process is:
* Install OpenBSD (all defaults).
* Run syspatch
* Install packages:
# pkg_add wget
# pkg_add gmp mpfr libmpc
# pkg_add gmake
* Get latest source and unpack:
$ wget
ftp://ftp.nluug.nl/mirror/languages/gcc/releases/gcc-8.2.0/gcc-8.2.0.tar.gz
$ tar xzf gcc-8.2.0.tar.gz
$ cd gcc-8.2.0
* Patch the code from here:
https://gcc.gnu.org/viewcvs/gcc/branches/gcc-8-branch/gcc/tree-vect-stmts.c?r1=264117&r2=264116&pathrev=264117
* Build:
$ ./configure --prefix=/opt/gcc-8.2.0 --with-gmp=/usr/local
--enable-languages=c,c++
$ gmake
>From gcc-bugs-return-614724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 14:35:40 2018
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Subject: [Bug libstdc++/87228] num_put::_M_insert_float uses stack inefficiently
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Proposed patch for the unlimited alloca usage:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00317.html
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Subject: [Bug libstdc++/28277] __builtin_alloca with no limit in libstdc++
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28277
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=87228
--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
For PR 87228 I've proposed a patch that makes num_put::_M_insert_int and
num_put::_M_insert_float switch from alloca to the heap for sizes larger than
one kilobyte:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00317.html
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Wed, 05 Sep 2018 15:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #22 from dave.anglin at bell dot net ---
I prefer the first approach although it might loop if there is an
error. Probably, it needs
to check if the current __cs_size is less than the new __cs_size before
doing a retry.
Another option would be to just duplicate the code instead of branching
back.
It's my understanding that the vsnprintf bug is fixed in 11.31 and some
HP-UX patch sets.
We win with the first approach when the initial buffer is large enough.
It's possible for vsnprintf on linux to return a negative value if an
output error occurs.
So, there's some justification to check the return on linux.
On 2018-09-05 8:07 AM, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
>
> --- Comment #21 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> This should never fail:
>
> --- a/libstdc++-v3/include/bits/locale_facets.tcc
> +++ b/libstdc++-v3/include/bits/locale_facets.tcc
> @@ -1000,7 +1000,11 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
> // First try a buffer perhaps big enough (most probably sufficient
> // for non-ios_base::fixed outputs)
> int __cs_size = __max_digits * 3;
> - char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
> + char* __cs;
> +
> +__retry_convert_from_v:
> +
> + __cs = static_cast<char*>(__builtin_alloca(__cs_size));
> if (__use_prec)
> __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
> __fbuf, __prec, __v);
> @@ -1020,6 +1024,15 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
> __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
> __fbuf, __v);
> }
> + else if (__builtin_expect(__len == -1, false))
> + {
> + const bool __fixed = __io.flags() & ios_base::fixed;
> + const int __max_exp =
> + __gnu_cxx::__numeric_traits<_ValueT>::__max_exponent10;
> + __cs_size = __fixed ? __max_exp + __prec + 4
> + : __max_digits * 2 + __prec;
> + goto __retry_convert_from_v;
> + }
> #else
> // Consider the possibility of long ios_base::fixed outputs
> const bool __fixed = __io.flags() & ios_base::fixed;
>
>
>
> Another option is to simply define _GLIBCXX_BROKEN_VSNPRINTF in
> config/os/hpux/os_defines.h and then force the use of vsprintf, which is always
> called with a large enough buffer:
>
> diff --git a/libstdc++-v3/config/locale/generic/c_locale.h
> b/libstdc++-v3/config/locale/generic/c_locale.h
> index 0d208166063..3045931c840 100644
> --- a/libstdc++-v3/config/locale/generic/c_locale.h
> +++ b/libstdc++-v3/config/locale/generic/c_locale.h
> @@ -70,7 +70,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
> __builtin_va_list __args;
> __builtin_va_start(__args, __fmt);
>
> -#if _GLIBCXX_USE_C99_STDIO
> +#if _GLIBCXX_USE_C99_STDIO && !_GLIBCXX_HAVE_BROKEN_VSNPRINTF
> const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
> #else
> const int __ret = __builtin_vsprintf(__out, __fmt, __args);
> diff --git a/libstdc++-v3/config/os/hpux/os_defines.h
> b/libstdc++-v3/config/os/hpux/os_defines.h
> index 1003477fe35..5a9c4faf75d 100644
> --- a/libstdc++-v3/config/os/hpux/os_defines.h
> +++ b/libstdc++-v3/config/os/hpux/os_defines.h
> @@ -109,4 +109,9 @@ typedef long int __padding_type;
> #if defined (__hppa__)
> #define _GLIBCXX_HAVE_BROKEN_STRTOLD 1
> #endif
> +
> +// The vnsprintf function returns -1 when the buffer is too small.
> +// See PR libstdc++/68737.
> +#define _GLIBCXX_HAVE_BROKEN_VSNPRINTF 1
> +
> #endif
> diff --git a/libstdc++-v3/include/bits/locale_facets.tcc
> b/libstdc++-v3/include/bits/locale_facets.tcc
> index 39da5766075..d5fa91e97d6 100644
> --- a/libstdc++-v3/include/bits/locale_facets.tcc
> +++ b/libstdc++-v3/include/bits/locale_facets.tcc
> @@ -992,7 +992,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
> char __fbuf[16];
> __num_base::_S_format_float(__io, __fbuf, __mod);
>
> -#if _GLIBCXX_USE_C99_STDIO
> +#if _GLIBCXX_USE_C99_STDIO && !_GLIBCXX_HAVE_BROKEN_VSNPRINTF
> // Precision is always used except for hexfloat format.
> const bool __use_prec =
> (__io.flags() & ios_base::floatfield) != ios_base::floatfield;
>
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Subject: [Bug bootstrap/87141] configure:14586: error: Could not determine word size.
Date: Wed, 05 Sep 2018 15:04:00 -0000
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--- Comment #4 from martin <mfe at live dot de> ---
@Richard Biener do you need more information for this issue?
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Subject: [Bug libstdc++/28277] __builtin_alloca with no limit in libstdc++
Date: Wed, 05 Sep 2018 15:13:00 -0000
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--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
My patch missed a case for num_put, which I'll fix.
Here's a crash test for codecvt::do_length in codecvt_members.cc:
#include <locale>
int main()
{
using namespace std;
auto& cvt = use_facet<codecvt<wchar_t, char, mbstate_t>>(locale::classic());
mbstate_t st = { };
size_t n = 8 * 1024 * 1024;
char* s = new char[n+1];
std::fill_n(s, n, 'a');
s[n] = '\0';
cvt.length(st, s, s+6, n);
}
The remaining uses in <bits/locale_facets_nonio.tcc> seem to be limited to sane
values.
messages<wchar_t>::do_get also looks vulnerable, but I haven't tested it.
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Subject: [Bug testsuite/52665] scan-assembler output produces wrong FAIL due to matching .ident
Date: Wed, 05 Sep 2018 15:32:00 -0000
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--- Comment #4 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> ---
Author: aldot
Date: Wed Sep 5 15:31:13 2018
New Revision: 264128
URL: https://gcc.gnu.org/viewcvs?rev=264128&root=gcc&view=rev
Log:
PR52665 do not let .ident confuse assembler scan tests
A branch with a name matching scan-assembler pattern triggers
inappropriate FAIL.
E.g. branch fixups-testsuite and
- gcc.target/i386/pr65871-?.c (scan-assembler-not "test")
- gcc.target/i386/pr41442.c (scan-assembler-times "test|cmp" 2)
etc.
This is a recurring problem as can be seen by some -fno-ident additions
by commits from e.g. Michael Meissner over the years: builtins-58.c,
powerpc/pr46728-?.c
The patch below adds -fno-ident if a testcase contains one of
scan-assembler, scan-assembler-not or scan-assembler-times.
Regression tested on x86_64-unknown-linux on a fixups-testsuite branch
where it fixes several false FAILs without regressions.
gcc/testsuite/ChangeLog
2016-06-18 Bernhard Reutner-Fischer <aldot@gcc.gnu.org>
PR testsuite/52665
* lib/gcc-dg.exp (gcc-dg-test-1): Iterate over _required_options.
* lib/target-supports.exp (scan-assembler_required_options,
scan-assembler-not_required_options,
scan-assembler-times_required_options): Add -fno-ident.
* lib/scanasm.exp (scan-assembler-times): Fix error message.
* c-c++-common/ident-0a.c: New test.
* c-c++-common/ident-0b.c: New test.
* c-c++-common/ident-1a.c: New test.
* c-c++-common/ident-1b.c: New test.
* c-c++-common/ident-2a.c: New test.
* c-c++-common/ident-2b.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/ident-0a.c
trunk/gcc/testsuite/c-c++-common/ident-0b.c
trunk/gcc/testsuite/c-c++-common/ident-1a.c
trunk/gcc/testsuite/c-c++-common/ident-1b.c
trunk/gcc/testsuite/c-c++-common/ident-2a.c
trunk/gcc/testsuite/c-c++-common/ident-2b.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/lib/gcc-dg.exp
trunk/gcc/testsuite/lib/target-supports.exp
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Subject: [Bug middle-end/87232] New: modular inverse not used for is-multiple test optimizations
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87232
Bug ID: 87232
Summary: modular inverse not used for is-multiple test
optimizations
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
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Target Milestone: ---
There's a paper on optimizing expressions like `return x % 679 == 0;`
http://duriansoftware.com/joe/Optimizing-is-multiple-checks-with-modular-arithmetic.html
Paper proposes to (if i'm not mistaken in calculations):
* replace `return x % A == 0;` with `return x * (modular inverse of A) <
(sizeof(x) * CHAR_BITS / A);` for odd A
* replace `return x % C == 0;` with `inv = x * (modular inverse of A); inv =
(inv >> B) | (inv << (sizeof(x) * CHAR_BITS - B)); return inv <=
(floor(sizeof(x) * CHAR_BITS / A) >> B);` for even C, where A is odd and C = (A
* pow(2, B))
Such tricks will allow to avoid imul and some mov instructions + use less
registers:
bool is_multiple_simple(unsigned x) {
return x % 1738 == 0;
}
is_multiple_simple(unsigned int): # @is_multiple_simple(unsigned int)
mov eax, edi
mov ecx, 2530521583
imul rcx, rax
shr rcx, 42
imul eax, ecx, 1738
cmp edi, eax
sete al
ret
bool is_multiple_tuned(unsigned x) {
unsigned inv = x * 148272749u; // inverse of 869 mod 2**32
inv = (inv >> 1u) | (inv << 31u); // rotate by one bit
return inv <= 2471212u; // floor(2**32/869) >> 1
}
is_multiple_tuned(unsigned int): # @is_multiple_tuned(unsigned int)
imul eax, edi, 148272749
shrd eax, edi, 1
cmp eax, 2471213
setb al
ret
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Subject: [Bug fortran/87233] New: Constraint C1279 still followed after f2008 standard revision (?)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87233
Bug ID: 87233
Summary: Constraint C1279 still followed after f2008 standard
revision (?)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
Target Milestone: ---
this is a question on the constraint C1279 from J3/04-007
"In the scoping unit of an elemental subprogram, an object designator with
a dummy argument as the base object shall not appear in a specification-expr
except as the argument to one of the intrinsic functions BIT_SIZE, KIND, LEN,
or the numeric inquiry functions (13.5.6)."
It seems that this restriction was removed for the Fortran 2008 standard
(J3/10-007)
gfortran still conforms to -std=f2003 here and disallows this even with the
flag -std=f2008?
Isn't this incorrect behaviour?
IMHO the following program below would be conformant to f2008.
Intel seems to accept this (while nagfor also vetoes for the same reason
obviously):
https://software.intel.com/en-us/fortran-compiler-18.0-developer-guide-and-reference-elemental
Cheers,
JRR
module m
implicit none
private
type, public :: string_t
private
character(len=:), allocatable :: cs
contains
private
procedure, pass(self) :: get_substr_pos
procedure, pass(self) :: get_substr_pos_len
procedure, pass(self) :: assign_t
procedure, pass(self), public :: length => string_len
generic, public :: assignment(=) => assign_t
generic, public :: substr => get_substr_pos, get_substr_pos_len
end type string_t
contains
elemental function string_len(self) result(l)
class(string_t), intent(in) :: self
! Function result
integer :: l
l = len(self%cs)
end function string_len
elemental subroutine assign_t(self, cs)
class(string_t), intent(inout) :: self
character(len=*), intent(in) :: cs
self%cs = cs
end subroutine assign_t
elemental function get_substr_pos( self, pos ) result( substr )
! Argument list
class(string_t), intent(in) :: self
integer, intent(in) :: pos
! Function result
character(len=len(self%cs)-pos+1) :: substr
! checks elided
substr = self%cs(pos:)
return
end function get_substr_pos
elemental function get_substr_pos_len( self, pos, slen ) result( substr )
! Argument list
class(string_t), intent(in) :: self
integer, intent(in) :: pos
integer, intent(in) :: slen
! Function result
character(len=slen) :: substr
! checks elided
substr = self%cs(pos:(pos+slen-1))
return
end function get_substr_pos_len
end module m
program assign_overlap
use m, only : string_t
implicit none
type(string_t) :: str
str = '0123456789'
print *, '"'//str%substr( pos=1 )//'"'
str = str%substr( pos=1, slen=5 )
print *, '"'//str%substr( pos=1 )//'"'
stop
end program assign_overlap
>From gcc-bugs-return-614732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 15:53:44 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Wed, 05 Sep 2018 15:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I prefer just forcing the use of vsprintf with a larger buffer, it avoids
adding more complexity to the code.
(In reply to dave.anglin from comment #22)
> I prefer the first approach although it might loop if there is an
> error. Probably, it needs
> to check if the current __cs_size is less than the new __cs_size before
> doing a retry.
Yes, it needs to avoid looping forever.
> Another option would be to just duplicate the code instead of branching
> back.
Yes, but it's already duplicated and I didn't want to add another one.
> It's my understanding that the vsnprintf bug is fixed in 11.31 and some
> HP-UX patch sets.
> We win with the first approach when the initial buffer is large enough.
>
> It's possible for vsnprintf on linux to return a negative value if an
> output error occurs.
> So, there's some justification to check the return on linux.
I'm not sure if an output error is ever possible when writing to a buffer
(rather than to a file) when we control the format specification.
I'll return to this another time.
>From gcc-bugs-return-614733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 16:04:24 2018
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From: "david.bolvansky at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87234] New: GCC should warn if template parameter redefines default argument
Date: Wed, 05 Sep 2018 16:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87234
Bug ID: 87234
Summary: GCC should warn if template parameter redefines
default argument
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: david.bolvansky at gmail dot com
Target Milestone: ---
-O3 -Wall -Werror -std=c++17
template< typename T = int > T func( );
template< typename T = int > T func( ) {
}
No warning.
Clang:
<source>:5:24: error: template parameter redefines default argument
template< typename T = int > T func( ) {
^
<source>:4:24: note: previous default template argument defined here
template< typename T = int > T func( );
^
1 error generated.
See:
https://stackoverflow.com/questions/14197436/c11-template-parameter-redefines-default-argument
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Subject: [Bug c++/87235] New: g++ doesn't implement sparse initialisation of arrays
Date: Wed, 05 Sep 2018 16:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87235
Bug ID: 87235
Summary: g++ doesn't implement sparse initialisation of arrays
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44662
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44662&action=edit
Testcase
g++ doesn't implement simple sparse array initialisations, such as:
int a[] = {
[3] = 99,
[5] = 82,
};
This can be seen by compiling the attached program with "g++ -c x.cpp".
g++ produces lots of "sorry, unimplemented: non-trivial designated initializers
not supported" errors.
>From gcc-bugs-return-614735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 16:09:14 2018
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Subject: [Bug c++/87235] g++ doesn't implement sparse initialisation of arrays
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87235
--- Comment #1 from dhowells at redhat dot com <dhowells at redhat dot com> ---
g++ -v gives:
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,fortran,objc,obj-c++,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-libmpx
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --enable-cet --with-tune=generic
--with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 8.1.1 20180712 (Red Hat 8.1.1-5) (GCC)
>From gcc-bugs-return-614736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 16:26:02 2018
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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87236] New: Using union to reinterpret from integer to floating point goes via memory
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87236
Bug ID: 87236
Summary: Using union to reinterpret from integer to floating
point goes via memory
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
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Target: x86_64-*-*
glibc has architecture-independent C code to handle reinterpreting between
integers and floating-point types via unions, and then some x86_64-specific
code in sysdeps/x86_64/fpu/math_private.h to do the same with with movd and
movq asms.
I wanted to see if the asms were obsolete and GCC could do a good enough thing
with the generic code. For reinterpreting from floating-point to integer, I
got the expected single instruction generated with trivial testcases. In the
other direction, however, I got code that unexpectedly goes via memory. Is
there some reason that's better? If I use the glibc asms I get a single
movq/movd without the intermediate memory use. (Note: I don't know if these
minimal tests reflect issues that would also appear in more complicated glibc
use using unions for this purpose.)
Testcase:
union ud { double d; unsigned long long int u; };
double insd (unsigned long long int x) { union ud v = { .u = x }; return v.d; }
union uf { float f; unsigned int u; };
float insf (unsigned int x) { union uf v = { .u = x }; return v.f; }
Compiled with -O2:
.file "t.c"
.text
.p2align 4
.globl insd
.type insd, @function
insd:
.LFB0:
.cfi_startproc
movq %rdi, -8(%rsp)
movsd -8(%rsp), %xmm0
ret
.cfi_endproc
.LFE0:
.size insd, .-insd
.p2align 4
.globl insf
.type insf, @function
insf:
.LFB1:
.cfi_startproc
movl %edi, -4(%rsp)
movss -4(%rsp), %xmm0
ret
.cfi_endproc
.LFE1:
.size insf, .-insf
.ident "GCC: (GNU) 9.0.0 20180904 (experimental) [trunk revision
264074]"
.section .note.GNU-stack,"",@progbits
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87236] Using union to reinterpret from integer to floating point goes via memory
Date: Wed, 05 Sep 2018 16:28:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
IIRC this is due to a tuning for generic and if you do -mcpu=Intel it won't go
via memory. Basically on some AMD hw the path via memory is faster than the
path between the sse and gprs.
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Subject: [Bug target/87236] Using union to reinterpret from integer to floating point goes via memory
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87236
Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Thanks. In that case removing the glibc asms is justified anyway since the
asms don't know about the different tunings.
>From gcc-bugs-return-614739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 16:59:54 2018
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Subject: [Bug c++/87235] g++ doesn't implement sparse initialisation of arrays
Date: Wed, 05 Sep 2018 16:59:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In C++20 there are just designated initializers that allow sparse member
initialization (but e.g. unlike C it can only skip some members, can't go
backwards or initialize the same one multiple times), as we as a GNU extension
allow the array designators, perhaps we could extend those to the same rules
(not allowing going backwards or initialize something multiple times, just skip
some elts).
>From gcc-bugs-return-614741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 17:12:44 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
Date: Wed, 05 Sep 2018 17:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |antoshkka at gmail dot com
--- Comment #29 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 87232 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 17:12:42 2018
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Subject: [Bug middle-end/87232] modular inverse not used for is-multiple test optimizations
Date: Wed, 05 Sep 2018 17:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 82853 ***
>From gcc-bugs-return-614742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 17:33:02 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87185] [8/9 Regression] ICE in prune_lambda_captures()
Date: Wed, 05 Sep 2018 17:33:00 -0000
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Sep 5 17:32:26 2018
New Revision: 264129
URL: https://gcc.gnu.org/viewcvs?rev=264129&root=gcc&view=rev
Log:
[PR c++/87185] ICE in prune-lambdas
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00249.html
cp/
PR c++/87185
* lambda.c (prune_lambda_captures): Protect against const_vars.get
returning NULL.
testsuite/
PR c++/87185
* g++.dg/pr87185.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/pr87185.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/lambda.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 17:34:10 2018
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Subject: [Bug c++/87185] [8/9 Regression] ICE in prune_lambda_captures()
Date: Wed, 05 Sep 2018 17:34:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed gcc-8 r264129.
>From gcc-bugs-return-614744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:09:19 2018
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Subject: [Bug target/87180] Pointer to member function comparison fails on hppa-linux-gnu
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
PR 87188 has more analysis so closing as a dup.
*** This bug has been marked as a duplicate of bug 87188 ***
>From gcc-bugs-return-614745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:09:19 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mattias.ellert at physics dot uu.s
| |e
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87180 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:09:57 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
See Also| |http://bugs.debian.org/9075
| |86
Ever confirmed|0 |1
--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
>From gcc-bugs-return-614747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:23:52 2018
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Subject: [Bug target/87231] stdatomic.h: No such file or directory on OpenBSD 6.3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87231
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target| |*-*-openbsd*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-05
Component|bootstrap |target
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is due to config/t-openbsd:
# We don't need GCC's own include files.
USER_H = $(EXTRA_HEADERS)
Except openbsd does not include stdatomic.h and most likely does not include
many other C11/C14/C1X headers either:
$(srcdir)/ginclude/stdnoreturn.h \
$(srcdir)/ginclude/stdalign.h \
$(srcdir)/ginclude/stdatomic.h \
>From gcc-bugs-return-614748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:28:09 2018
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Subject: [Bug target/87231] stdatomic.h: No such file or directory on OpenBSD 6.3
Date: Wed, 05 Sep 2018 18:28:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Similar issue to PR 69744. OpenBSD config should just remove that.
>From gcc-bugs-return-614749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:38:23 2018
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Subject: [Bug fortran/84640] gcc/fortran/simplify.c:2587:9: runtime error: pointer index expression with base 0x0000090de160 overflowed to 0xffffffffc0632960
Date: Wed, 05 Sep 2018 18:38:00 -0000
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--- Comment #6 from David Binderman <dcb314 at hotmail dot com> ---
Still going wrong in the fortran testsuite:
../../trunk/gcc/fortran/simplify.c:2174:9: runtime error: pointer index
expression with base 0x000009d7eda8 overflowed to 0xfffc0314c058a5e8
../../trunk/gcc/fortran/simplify.c:2174:9: runtime error: pointer index
expression with base 0x00000ae36b98 overflowed to 0xfffc06f8408423d8
../../trunk/gcc/fortran/simplify.c:2175:9: runtime error: pointer index
expression with base 0x000009d7ed78 overflowed to 0xfffc0314c058a5b8
../../trunk/gcc/fortran/simplify.c:2175:9: runtime error: pointer index
expression with base 0x00000ae36b78 overflowed to 0xfffc06f8408423b8
../../trunk/gcc/fortran/simplify.c:2624:9: runtime error: pointer index
expression with base 0x000009d23a50 overflowed to 0xfffc039bf6aaf290
../../trunk/gcc/fortran/simplify.c:2624:9: runtime error: pointer index
expression with base 0x00000b1ca9a0 overflowed to 0xfffc011e40e961e0
../../trunk/gcc/fortran/simplify.c:2625:9: runtime error: pointer index
expression with base 0x000009d24270 overflowed to 0xfffc039bf6aafab0
../../trunk/gcc/fortran/simplify.c:2625:9: runtime error: pointer index
expression with base 0x00000b1d0fd0 overflowed to 0xfffc011e40e9c810
>From gcc-bugs-return-614750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 18:44:25 2018
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Subject: [Bug fortran/84640] gcc/fortran/simplify.c:2587:9: runtime error: pointer index expression with base 0x0000090de160 overflowed to 0xffffffffc0632960
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--- Comment #7 from David Binderman <dcb314 at hotmail dot com> ---
Command line required:
$ gfortran -c ./gfortran.dg/array_simplify_1.f90 ./gfortran.dg/eoshift.f90
./gfortran.dg/simplify_cshift_1.f90 ./gfortran.dg/simplify_eoshift_1.f90
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Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
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qinzhao at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #24 from qinzhao at gcc dot gnu.org ---
the fix has been committed into upstream.
>From gcc-bugs-return-614752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 19:03:32 2018
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Subject: [Bug middle-end/78809] Inline strcmp with small constant strings
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qinzhao at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #48 from qinzhao at gcc dot gnu.org ---
all the issues have been resolved.
close this one as fixed.
>From gcc-bugs-return-614753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 19:23:31 2018
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Subject: [Bug fortran/86116] [6/7/8/9 Regression] Ambiguous generic interface not recognised
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--- Comment #5 from janus at gcc dot gnu.org ---
Author: janus
Date: Wed Sep 5 19:22:53 2018
New Revision: 264131
URL: https://gcc.gnu.org/viewcvs?rev=264131&root=gcc&view=rev
Log:
2018-09-05 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* interface.c (compare_type): Remove a CLASS/TYPE check.
(compare_type_characteristics): New function that behaves like the old
'compare_type'.
(gfc_check_dummy_characteristics, gfc_check_result_characteristics):
Call 'compare_type_characteristics' instead of 'compare_type'.
2018-09-05 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* gfortran.dg/generic_34.f90: New test case.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/generic_34.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/interface.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug gcov-profile/86957] gcc should warn about missing profiles for a compilation unit or a new function with -fprofile-use
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--- Comment #5 from Indu Bhagat <ibhagatgnu at gmail dot com> ---
Proposed patch https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00367.html
>From gcc-bugs-return-614755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 19:37:54 2018
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From: "richard-gccbugzilla at metafoo dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87237] New: __atomic_load on 8-byte-sized, 1-byte-aligned struct is not atomic
Date: Wed, 05 Sep 2018 19:37:00 -0000
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Bug ID: 87237
Summary: __atomic_load on 8-byte-sized, 1-byte-aligned struct
is not atomic
Product: gcc
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It's my understanding that __atomic_load is supposed to work for an essentially
arbitrary TYPE, including the case where alignof(TYPE) < sizeof(TYPE). (From
the documentation, "The four non-arithmetic functions (load, store, exchange,
and compare_exchange) all have a generic version as well. This generic version
works on any data type.") However:
struct A { char c[4]; } *p, *q;
void f() { __atomic_load(p, q, 5); }
On x86_64, GCC emits f as a 'movl' from *p. That is not atomic if *p straddles
two cache lines.
libatomic's __atomic_load implementation gets this right, and falls back on a
mutex in the case where the source straddles two cache lines, but GCC doesn't
seem to realize it needs to call it.
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From: "hiraditya at msn dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87238] New: Redundant Restore of $x0 when memcpy always returns the first argument.
Date: Wed, 05 Sep 2018 21:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87238
Bug ID: 87238
Summary: Redundant Restore of $x0 when memcpy always returns
the first argument.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hiraditya at msn dot com
Target Milestone: ---
$ cat test.cpp
struct BigStruct {
int x[64];
};
void structByValue(BigStruct s);
void callStructByValue(int unused, int unused2, BigStruct s) {
structByValue(s);
}
$ g++ -O3 -arch arm64 test.cpp -S -o -
callStructByValue(int, int, BigStruct):
stp x29, x30, [sp, -272]!
mov x1, x2
mov x2, 256
add x29, sp, 0
add x0, x29, 16 <<--------
bl memcpy
add x0, x29, 16 <<-------- redundant
bl structByValue(BigStruct)
ldp x29, x30, [sp], 272
ret
We could just do remove the second 'add x0, x29, 16' as memcpy is guaranteed to
return the pointer to desination.
http://man7.org/linux/man-pages/man3/memcpy.3.html
Possibly duplicate of PR82991 but not sure.
>From gcc-bugs-return-614757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 21:18:24 2018
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Subject: [Bug c++/87109] Wrong overload picked with ref-qualifiers
Date: Wed, 05 Sep 2018 21:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87109
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Sep 5 21:17:47 2018
New Revision: 264132
URL: https://gcc.gnu.org/viewcvs?rev=264132&root=gcc&view=rev
Log:
PR c++/87109, wrong overload with ref-qualifiers.
* call.c (build_user_type_conversion_1): Use NULL instead of 0. Bail
out if performing the maybe-rvalue overload resolution and a conversion
function is getting called.
* g++.dg/cpp0x/ref-qual19.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/ref-qual19.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 21:20:17 2018
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Subject: [Bug c++/87109] Wrong overload picked with ref-qualifiers
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 21:27:02 2018
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Subject: [Bug c++/59372] accepts-invalid with constexpr function pointer variable as non-type template argument
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Richard Smith <richard-gccbugzilla at metafoo dot co.uk> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Confirmed fixed.
>From gcc-bugs-return-614760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 21:52:30 2018
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Subject: [Bug c++/59372] accepts-invalid with constexpr function pointer variable as non-type template argument
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
CC| |jason at gcc dot gnu.org
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Started to be rejected with r230365 "Merge C++ delayed folding branch."
Jason, is it expected that this got fixed by that merge, or should we add the
testcase?
>From gcc-bugs-return-614761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 22:23:20 2018
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Subject: [Bug rtl-optimization/87238] Redundant Restore of $x0 when memcpy always returns the first argument.
Date: Wed, 05 Sep 2018 22:23:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |aarch64-*-*
Version|unknown |7.3.0
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>$ g++ -O3 -arch arm64 test.cpp -S -o -
That command line is seems wrong.
So does the output of the assembly code too.
Anyways confirmed.
mov x1, x2
mov x2, 256
add x29, sp, 0
.cfi_def_cfa_register 29
add x0, x29, 16
bl memcpy
add x0, x29, 16
bl _Z13structByValue9BigStruct
ldp x29, x30, [sp], 272
>From gcc-bugs-return-614762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 22:37:07 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 22:37:00 -0000
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--- Comment #12 from dave.anglin at bell dot net ---
On 2018-09-05 8:50 AM, jamborm at gcc dot gnu.org wrote:
> Then I believe SRA is not the culprit, you probably need to trace what
> happens to SR.13 afterwards and whether it is correctly expanded to
> RTL.
If I compile S.cpp with "-O2 -fno-tree-sra", the test passes:
gcc -c -fPIC -O2 -fno-tree-sra S.cpp
gcc -shared -fPIC -o libS.so S.o
export LD_LIBRARY_PATH=`pwd`
./main
OK
>From gcc-bugs-return-614763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 05 22:45:06 2018
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Subject: [Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test
Date: Wed, 05 Sep 2018 22:45:00 -0000
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--- Comment #24 from dave.anglin at bell dot net ---
On 2018-09-05 11:53 AM, redi at gcc dot gnu.org wrote:
> I prefer just forcing the use of vsprintf with a larger buffer, it avoids
> adding more complexity to the code.
Will test in next build.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86779
--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Author: hp
Date: Wed Sep 5 23:14:42 2018
New Revision: 264134
URL: https://gcc.gnu.org/viewcvs?rev=264134&root=gcc&view=rev
Log:
PR target/86779
* config/cris/cris.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Redefine
to speculation_safe_value_not_needed.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/cris/cris.c
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 23:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
--- Comment #14 from dave.anglin at bell dot net ---
Created attachment 44664
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44664&action=edit
S.cpp.112t.ifcombine
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 05 Sep 2018 23:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
--- Comment #13 from dave.anglin at bell dot net ---
On 2018-09-05 8:50 AM, jamborm at gcc dot gnu.org wrote:
> Then I believe SRA is not the culprit, you probably need to trace what
> happens to SR.13 afterwards and whether it is correctly expanded to
> RTL.
I did some more investigation. It looks like the ifcombine pass does a
bad transformation:
 <bb 4> [local count: 1014686024]:
 SR.13_1 = MEM[(const struct &)itCO_2 + 8];
 SR.14_7 = MEM[(const struct &)itCO_2 + 12];
 if (SR.13_1 == operator!=)
   goto <bb 5>; [30.00%]
 else
   goto <bb 6>; [70.00%]
 <bb 5> [local count: 304405807]:
 if (SR.14_7 == 0)
   goto <bb 7>; [5.50%]
 else
   goto <bb 6>; [94.50%]
transforms to
 <bb 4> [local count: 1014686024]:
 SR.13_1 = MEM[(const struct &)itCO_2 + 8];
 SR.14_7 = MEM[(const struct &)itCO_2 + 12];
 _13 = SR.14_7 == 0;
 _12 = SR.13_1 == operator!=;
 _14 = _12 & _13;
 if (_14 != 0)
   goto <bb 6>; [1.65%]
 else
   goto <bb 5>; [98.35%]
Doing a "&" operation on a function pointer looks bad.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86779, which changed state.
Bug 86779 Summary: Cris port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86779
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
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Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #2 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
.
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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--- Comment #15 from dave.anglin at bell dot net ---
On 2018-09-05 7:21 PM, dave.anglin at bell dot net wrote:
> Doing a "&" operation on a function pointer looks bad.
No, I misread this line "_12 = SR.13_1 == operator!=;". It looks like
an expand problem.
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Subject: [Bug c++/86982] Make -Wreturn-local-addr know about std::move and std::forward
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Sep 6 00:38:13 2018
New Revision: 264139
URL: https://gcc.gnu.org/viewcvs?rev=264139&root=gcc&view=rev
Log:
PR c++/86982, -Wreturn-local-addr and std::move and std::forward.
* typeck.c (maybe_warn_about_returning_address_of_local): Handle calls
to std::move or std::forward.
(is_std_forward_p): New function.
* g++.dg/warn/Wreturn-local-addr-5.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wreturn-local-addr-5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86982] Make -Wreturn-local-addr know about std::move and std::forward
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Done.
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Subject: [Bug middle-end/86901] [AArch64] Suboptimal register allocation for int/float reinterpret
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-06
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(insn 8 7 9 2 (set (subreg:DI (reg:SI 80) 0)
(zero_extract:DI (subreg:DI (reg/v:SF 77 [ y ]) 0)
(const_int 11 [0xb])
(const_int 20 [0x14]))) "t991.c":13 695 {*extzvdi}
(nil))
Confirmed.
So just like insv<mode> exists (instead of just insv which was the only way
before) so should extv<mode> and extzv<mode>. I have seen this on MIPS64
before too.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69103
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-614775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 02:43:31 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87240] New: ICE in deferred-length string
Date: Thu, 06 Sep 2018 02:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87240
Bug ID: 87240
Summary: ICE in deferred-length string
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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The following code posted on c.l.f. on Apr 28, 2018 leads to an ICE with
gfortran, but it seems this was never posted here:
$ gfortran alloc_string.f90
alloc_string.f90:24:0:
24 | out = gettwo( inp )
|
internal compiler error: in gimplify_var_or_parm_decl, at gimplify.c:2697
with the following code:
!alloc_string.f90
module test
implicit none
contains
elemental function gettwo( s ) result( res )
character(*), intent(in) :: s
character(len(s)) :: res
res = s( 1 : 2 )
endfunction gettwo
endmodule test
program main
use test
implicit none
character(10) :: inp( 5 )
! character(10), allocatable :: out(:) ! this works
character(:), allocatable :: out(:) ! this is NG
inp = [ 'aaa', 'bbb', 'ccc', 'ddd', 'eee' ]
out = gettwo( inp )
print *, out ! aa bb cc dd ee (with gfortran-7.3 + fixed-length out)
endprogram main
>From gcc-bugs-return-614774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 02:43:21 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87239] New: ICE in deferred-length string
Date: Thu, 06 Sep 2018 02:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87239
Bug ID: 87239
Summary: ICE in deferred-length string
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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The following code posted on c.l.f. on Apr 28, 2018 leads to an ICE with
gfortran, but it seems this was never posted here:
$ gfortran alloc_string.f90
alloc_string.f90:24:0:
24 | out = gettwo( inp )
|
internal compiler error: in gimplify_var_or_parm_decl, at gimplify.c:2697
with the following code:
!alloc_string.f90
module test
implicit none
contains
elemental function gettwo( s ) result( res )
character(*), intent(in) :: s
character(len(s)) :: res
res = s( 1 : 2 )
endfunction gettwo
endmodule test
program main
use test
implicit none
character(10) :: inp( 5 )
! character(10), allocatable :: out(:) ! this works
character(:), allocatable :: out(:) ! this is NG
inp = [ 'aaa', 'bbb', 'ccc', 'ddd', 'eee' ]
out = gettwo( inp )
print *, out ! aa bb cc dd ee (with gfortran-7.3 + fixed-length out)
endprogram main
>From gcc-bugs-return-614776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 02:48:53 2018
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Subject: [Bug fortran/87233] Constraint C1279 still followed after f2008 standard revision (?)
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
The check is easy enough to delete:
diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
index c5bf822cd24..a8e6dd389b0 100644
--- a/gcc/fortran/expr.c
+++ b/gcc/fortran/expr.c
@@ -3073,19 +3073,6 @@ check_restricted (gfc_expr *e)
sym = e->symtree->n.sym;
t = false;
- /* If a dummy argument appears in a context that is valid for a
- restricted expression in an elemental procedure, it will have
- already been simplified away once we get here. Therefore we
- don't need to jump through hoops to distinguish valid from
- invalid cases. */
- if (sym->attr.dummy && sym->ns == gfc_current_ns
- && sym->ns->proc_name && sym->ns->proc_name->attr.elemental)
- {
- gfc_error ("Dummy argument %qs not allowed in expression at %L",
- sym->name, &e->where);
- break;
- }
-
if (sym->attr.optional)
{
gfc_error ("Dummy argument %qs at %L cannot be OPTIONAL",
>From gcc-bugs-return-614777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 03:12:47 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87233] Constraint C1279 still followed after f2008 standard revision (?)
Date: Thu, 06 Sep 2018 03:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87233
--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #1)
> The check is easy enough to delete:
>
> diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
> index c5bf822cd24..a8e6dd389b0 100644
> --- a/gcc/fortran/expr.c
> +++ b/gcc/fortran/expr.c
> @@ -3073,19 +3073,6 @@ check_restricted (gfc_expr *e)
> sym = e->symtree->n.sym;
> t = false;
>
> - /* If a dummy argument appears in a context that is valid for a
> - restricted expression in an elemental procedure, it will have
> - already been simplified away once we get here. Therefore we
> - don't need to jump through hoops to distinguish valid from
> - invalid cases. */
> - if (sym->attr.dummy && sym->ns == gfc_current_ns
> - && sym->ns->proc_name && sym->ns->proc_name->attr.elemental)
> - {
> - gfc_error ("Dummy argument %qs not allowed in expression at %L",
> - sym->name, &e->where);
> - break;
> - }
> -
> if (sym->attr.optional)
> {
> gfc_error ("Dummy argument %qs at %L cannot be OPTIONAL",
What happens with -std=f95 and -std=f2003?
--
steve
>From gcc-bugs-return-614779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 04:13:15 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87240] ICE in deferred-length string
Date: Thu, 06 Sep 2018 04:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87240
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Dup.
*** This bug has been marked as a duplicate of bug 87239 ***
>From gcc-bugs-return-614778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 04:13:15 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87239] ICE in deferred-length string
Date: Thu, 06 Sep 2018 04:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87239
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 87240 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 04:32:52 2018
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From: "poppeter1982 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87241] New: A hang problem for c++filt
Date: Thu, 06 Sep 2018 04:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87241
Bug ID: 87241
Summary: A hang problem for c++filt
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: poppeter1982 at gmail dot com
Target Milestone: ---
Created attachment 44665
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44665&action=edit
The proof of concept ASCII file for c++filt
Hi There
Our fuzzer generates an input which may hang the execution of c++filt, please
check it on your side if this is a real positive. You could use
./c++filt < input
to reproduce it.
Originally I reported it to binutils bugzilla, the link is
https://sourceware.org/bugzilla/show_bug.cgi?id=23589, the maintainer confirmed
it is a problem with the C++ name de-mangling code and recommended me to
resubmit here.
Thanks
Peng
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87239
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Dominique, my apologies, I don't know why my browser did send the form data
twice.
>From gcc-bugs-return-614782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 07:18:46 2018
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From: "shane@time-travellers.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87231] stdatomic.h: No such file or directory on OpenBSD 6.3
Date: Thu, 06 Sep 2018 07:18:00 -0000
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--- Comment #3 from Shane Kerr <shane@time-travellers.org> ---
(In reply to Andrew Pinski from comment #2)
> Similar issue to PR 69744. OpenBSD config should just remove that.
How would I do that?
Should I just comment out the USER_H variable?
>From gcc-bugs-return-614783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 07:36:14 2018
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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80080] S390: Isses with emitted cs-instructions for __atomic builtins.
Date: Thu, 06 Sep 2018 07:36:00 -0000
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--- Comment #13 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Thu Sep 6 07:35:35 2018
New Revision: 264142
URL: https://gcc.gnu.org/viewcvs?rev=264142&root=gcc&view=rev
Log:
S/390: Register pass_s390_early_mach statically
The dump file used to come at the end of the sorted dump file list,
because the pass was registered dynamically. This did not reflect the
order in which passes are executed. Static registration fixes this:
* foo4.c.277r.split2
* foo4.c.281r.early_mach
* foo4.c.282r.pro_and_epilogue
gcc/ChangeLog:
2018-09-06 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* config/s390/s390-passes.def: New file.
* config/s390/s390-protos.h (class rtl_opt_pass): Add forward
declaration.
(make_pass_s390_early_mach): Add declaration.
* config/s390/s390.c (make_pass_s390_early_mach):
(s390_option_override): Remove dynamic registration.
* config/s390/t-s390: Add s390-passes.def.
Added:
trunk/gcc/config/s390/s390-passes.def
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390-protos.h
trunk/gcc/config/s390/s390.c
trunk/gcc/config/s390/t-s390
>From gcc-bugs-return-614784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 07:39:21 2018
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Subject: [Bug target/80080] S390: Isses with emitted cs-instructions for __atomic builtins.
Date: Thu, 06 Sep 2018 07:39:00 -0000
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--- Comment #14 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Thu Sep 6 07:38:42 2018
New Revision: 264143
URL: https://gcc.gnu.org/viewcvs?rev=264143&root=gcc&view=rev
Log:
S/390: Prohibit SYMBOL_REF in UNSPECV_CAS
Inhibit constant propagation inlining SYMBOL_REF loads into
UNSPECV_CAS. Even though reload can later undo it, the resulting
code will be less efficient.
gcc/ChangeLog:
2018-09-06 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* config/s390/predicates.md: Add nonsym_memory_operand.
* config/s390/s390.c (s390_legitimize_cs_operand): If operand
contains a SYMBOL_REF, load it into an intermediate pseudo.
(s390_emit_compare_and_swap): Legitimize operand.
* config/s390/s390.md: Use the new nonsym_memory_operand
with UNSPECV_CAS patterns.
gcc/testsuite/ChangeLog:
2018-09-06 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* gcc.target/s390/pr80080-3.c: New test.
* gcc.target/s390/s390.exp: Make sure the new test passes
on all optimization levels.
Added:
trunk/gcc/testsuite/gcc.target/s390/pr80080-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/predicates.md
trunk/gcc/config/s390/s390.c
trunk/gcc/config/s390/s390.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/s390/s390.exp
>From gcc-bugs-return-614785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 09:21:35 2018
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Subject: [Bug c++/87241] A hang problem for c++filt
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-06
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
__cxa_demangle in cp-demangle.c correctly returns -2 (the mangled name is not
valid) but cplus_demangle in cplus-dem.c tries to allocate crazy amounts of
memory.
>From gcc-bugs-return-614786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 10:19:22 2018
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Subject: [Bug middle-end/87162] [6.2.0] Internal compiler error: Error reporting routines re-entered.
Date: Thu, 06 Sep 2018 10:19:00 -0000
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ma.jiang at zte dot com.cn changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ma.jiang at zte dot com.cn
--- Comment #8 from ma.jiang at zte dot com.cn ---
(In reply to Wen Yang from comment #7)
> This patch will make it more robust:
>
> # git diff
> diff --git a/gcc/trans-mem.c b/gcc/trans-mem.c
> index 1d4eb80..326e1c4 100644
> --- a/gcc/trans-mem.c
> +++ b/gcc/trans-mem.c
> @@ -2099,6 +2099,9 @@ gate_tm_init (void)
> if (!flag_tm)
> return false;
>
> + if (!cfun->cfg)
> + return false;
> +
> calculate_dominance_info (CDI_DOMINATORS);
> bitmap_obstack_initialize (&tm_obstack);
I think gate functions should not do complex compute. gate_tm_init should be
split into two parts.
>From gcc-bugs-return-614787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 11:20:51 2018
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From: "minshall at acm dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87242] New: optimize -O2 incorrect output
Date: Thu, 06 Sep 2018 11:20:00 -0000
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Bug ID: 87242
Summary: optimize -O2 incorrect output
Product: gcc
Version: 5.4.0
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Target Milestone: ---
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.4.0-6ubuntu1~16.04.10' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.10)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-D' 'emacs' '-I' '.' '-I' '.' '-I'
'../lib' '-I' '../lib' '-pthread' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
'-isystem' '/usr/include/gtk-3.0' '-isystem' '/usr/include/gio-unix-2.0/'
'-isystem' '/usr/include/mirclient' '-isystem' '/usr/include/mircore'
'-isystem' '/usr/include/mircookie' '-isystem' '/usr/include/cairo' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/harfbuzz' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/atk-1.0' '-isystem'
'/usr/include/cairo' '-isystem' '/usr/include/pixman-1' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/gdk-pixbuf-2.0' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
'-isystem' '/usr/include/freetype2' '-isystem' '/usr/include/libpng12'
'-isystem' '/usr/include/libxml2' '-pthread' '-isystem'
'/usr/include/webkitgtk-4.0' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
'-isystem' '/usr/include/gtk-3.0' '-isystem' '/usr/include/gio-unix-2.0/'
'-isystem' '/usr/include/mirclient' '-isystem' '/usr/include/mircore'
'-isystem' '/usr/include/mircookie' '-isystem' '/usr/include/cairo' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/harfbuzz' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/atk-1.0' '-isystem'
'/usr/include/cairo' '-isystem' '/usr/include/pixman-1' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/gdk-pixbuf-2.0' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/libsoup-2.4' '-isystem' '/usr/include/libxml2' '-isystem'
'/usr/include/webkitgtk-4.0' '-isystem' '/usr/include/glib-2.0' '-isystem'
'/usr/lib/x86_64-linux-gnu/glib-2.0/include' '-pthread' '-isystem'
'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
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#include "..." search starts here:
#include <...> search starts here:
.
../lib
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GNU C11 (Ubuntu 5.4.0-6ubuntu1~16.04.10) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Ubuntu 5.4.0-6ubuntu1~16.04.10) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: bab7da148afbe213714f0f38814b36b0
<built-in>: warning: macro "__INT64_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT64_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST16_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_DENORM_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__linux" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_INT__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DECIMAL_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_HAS_QUIET_NAN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__MMX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__BIGGEST_ALIGNMENT__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__UINTMAX_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_HLE_ACQUIRE" is not used [-Wunused-macros]
<built-in>: warning: macro "__DECIMAL_BID_FORMAT__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__UINT16_MAX__" is not used [-Wunused-macros]
emacs-module.c:258:0: warning: macro "MODULE_FUNCTION_BEGIN" is not used
[-Wunused-macros]
#define MODULE_FUNCTION_BEGIN(error_retval) \
^
<built-in>: warning: macro "unix" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SSE_MATH__" is not used [-Wunused-macros]
<built-in>: warning: macro "__k8" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_RELAXED" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST16_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST64_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_HAS_QUIET_NAN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__code_model_small__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST32_TYPE__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__LDBL_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_DECIMAL_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_DOUBLE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_MIN_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_ACQ_REL" is not used [-Wunused-macros]
<built-in>: warning: macro "__STDC__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_CHAR_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__SIG_ATOMIC_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_POINTER__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_HAS_DENORM__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINTPTR_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_INT128__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_SIZE_T__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_MAX_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_HAS_DENORM__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ELF__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_FAST8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_FAST8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_MANT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINTPTR_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST64_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_CHAR16_T_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__amd64__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FXSR__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INTMAX_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_RELEASE" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_SEQ_CST" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__unix__" is not used [-Wunused-macros]
<built-in>: warning: macro "__x86_64" is not used [-Wunused-macros]
<built-in>: warning: macro "__GNUC_PATCHLEVEL__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__has_include" is not used [-Wunused-macros]
emacs-module.c:246:0: warning: macro "MODULE_FUNCTION_BEGIN_NO_CATCH" is not
used [-Wunused-macros]
#define MODULE_FUNCTION_BEGIN_NO_CATCH(error_retval) \
^
<built-in>: warning: macro "__unix" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST16_TYPE__" is not used
[-Wunused-macros]
<command-line>:1:0: warning: macro "_REENTRANT" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_HLE_RELEASE" is not used [-Wunused-macros]
<built-in>: warning: macro "__LONG_LONG_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MANT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__VERSION__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT32_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__ORDER_PDP_ENDIAN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_SUBNORMAL_MIN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__LONG_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INTPTR_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MANT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_FLOAT128__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT64_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC_EVAL_METHOD__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_DENORM_MIN__" is not used [-Wunused-macros]
<command-line>:2:0: warning: macro "emacs" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_FLOAT80__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WINT_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZE_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WCHAR_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FINITE_MATH_ONLY__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SHRT_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_BOOL_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__DEC32_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__OPTIMIZE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WINT_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WCHAR_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GXX_ABI_VERSION" is not used [-Wunused-macros]
<built-in>: warning: macro "__x86_64__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST64_TYPE__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__FLT_HAS_QUIET_NAN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__FLT_HAS_INFINITY__" is not used [-Wunused-macros]
<built-in>: warning: macro "__CHAR16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__STDC_VERSION__" is not used [-Wunused-macros]
<built-in>: warning: macro "__k8__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_SHORT_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT_FAST64_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WINT_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_HAS_INFINITY__" is not used [-Wunused-macros]
emacs-module.c:189:0: warning: macro "MODULE_SETJMP_1" is not used
[-Wunused-macros]
#define MODULE_SETJMP_1(handlertype, handlerfunc, retval, c0, c) \
^
<built-in>: warning: macro "__CHAR32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_CONSUME" is not used [-Wunused-macros]
<built-in>: warning: macro "__GNUC_MINOR__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_MANT_DIG__" is not used [-Wunused-macros]
emacs-module.c:168:0: warning: macro "MODULE_SETJMP" is not used
[-Wunused-macros]
#define MODULE_SETJMP(handlertype, handlerfunc, retval) \
^
<built-in>: warning: macro "__SIZEOF_LONG_LONG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SSP_STRONG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST8_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINTMAX_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SCHAR_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__USER_LABEL_PREFIX__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__LDBL_HAS_INFINITY__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__STDC_UTF_16__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_LLONG_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__GNUC__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_HAS_DENORM__" is not used [-Wunused-macros]
<built-in>: warning: macro "__PTRDIFF_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_WINT_T__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LP64__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_INT_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__has_include_next" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT16_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZE_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_WCHAR_T_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT_FAST16_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__PRAGMA_REDEFINE_EXTNAME" is not used
[-Wunused-macros]
<built-in>: warning: macro "__DEC64_MANT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INTPTR_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SSE2__" is not used [-Wunused-macros]
<built-in>: warning: macro "__WCHAR_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_FLOAT__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MAX_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SSE__" is not used [-Wunused-macros]
<built-in>: warning: macro "_LP64" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ORDER_BIG_ENDIAN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MAX_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__PTRDIFF_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC64_SUBNORMAL_MIN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__DEC128_MANT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_DECIMAL_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__ORDER_LITTLE_ENDIAN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_LEAST8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_EVAL_METHOD__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_CHAR32_T_LOCK_FREE" is not used
[-Wunused-macros]
emacs-module.c:164:0: warning: macro "MODULE_HANDLE_NONLOCAL_EXIT" is not used
[-Wunused-macros]
#define MODULE_HANDLE_NONLOCAL_EXIT(retval) \
^
<built-in>: warning: macro "__linux__" is not used [-Wunused-macros]
<built-in>: warning: macro "_FORTIFY_SOURCE" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_LONG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT16_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__gnu_linux__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__amd64" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLOAT_WORD_ORDER__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_FAST64_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_RADIX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_LONG_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT_LEAST8_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_TEST_AND_SET_TRUEVAL" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT64_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__BYTE_ORDER__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INTMAX_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MIN_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__CHAR_BIT__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIG_ATOMIC_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_MIN_10_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DBL_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_EPSILON__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT_FAST32_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC32_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SSE2_MATH__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MIN_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__REGISTER_PREFIX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINTMAX_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIG_ATOMIC_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "linux" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MAX_EXP__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT8_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__GNUC_STDC_INLINE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT_FAST32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT16_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__INT8_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__ATOMIC_ACQUIRE" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_IEC_559_COMPLEX" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INTMAX_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1" is not used
[-Wunused-macros]
<built-in>: warning: macro "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2" is not used
[-Wunused-macros]
<built-in>: warning: macro "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4" is not used
[-Wunused-macros]
<built-in>: warning: macro "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8" is not used
[-Wunused-macros]
<built-in>: warning: macro "__LDBL_MAX__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_IEC_559" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_ATOMIC_POINTER_LOCK_FREE" is not used
[-Wunused-macros]
<built-in>: warning: macro "__STDC_HOSTED__" is not used [-Wunused-macros]
<built-in>: warning: macro "__LDBL_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_LONG_DOUBLE__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT_FAST16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__GCC_HAVE_DWARF2_CFI_ASM" is not used
[-Wunused-macros]
<built-in>: warning: macro "__INT_FAST32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_PTRDIFF_T__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT16_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_DIG__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_SHORT__" is not used [-Wunused-macros]
<built-in>: warning: macro "__SIZEOF_WCHAR_T__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT32_C" is not used [-Wunused-macros]
<built-in>: warning: macro "__STDC_UTF_32__" is not used [-Wunused-macros]
<built-in>: warning: macro "__FLT_DENORM_MIN__" is not used [-Wunused-macros]
<built-in>: warning: macro "__UINT32_TYPE__" is not used [-Wunused-macros]
<built-in>: warning: macro "__DEC128_SUBNORMAL_MIN__" is not used
[-Wunused-macros]
<built-in>: warning: macro "__LDBL_DIG__" is not used [-Wunused-macros]
emacs-module.c:416:0: warning: macro "XSET_MODULE_FUNCTION" is not used
[-Wunused-macros]
#define XSET_MODULE_FUNCTION(var, ptr) \
^
<built-in>: warning: macro "__UINT_FAST16_MAX__" is not used [-Wunused-macros]
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-D' 'emacs' '-I' '.' '-I' '.' '-I'
'../lib' '-I' '../lib' '-pthread' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
'-isystem' '/usr/include/gtk-3.0' '-isystem' '/usr/include/gio-unix-2.0/'
'-isystem' '/usr/include/mirclient' '-isystem' '/usr/include/mircore'
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'/usr/include/pango-1.0' '-isystem' '/usr/include/harfbuzz' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/atk-1.0' '-isystem'
'/usr/include/cairo' '-isystem' '/usr/include/pixman-1' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/gdk-pixbuf-2.0' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
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'-isystem' '/usr/include/libxml2' '-pthread' '-isystem'
'/usr/include/webkitgtk-4.0' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
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'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
'-isystem' '/usr/include/glib-2.0' '-isystem'
'/usr/lib/x86_64-linux-gnu/glib-2.0/include' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/freetype2' '-MMD' '-MF'
'deps/emacs-module.d' '-MP' '-isystem' '/usr/include/p11-kit-1' '-fno-common'
'-Wabi' '-Waddress' '-Waggressive-loop-optimizations' '-Wall' '-Wattributes'
'-Wbool-compare' '-Wbuiltin-macro-redefined' '-Wcast-align' '-Wchar-subscripts'
'-Wchkp' '-Wclobbered' '-Wcomment' '-Wcoverage-mismatch' '-Wcpp' '-Wdate-time'
'-Wdeprecated' '-Wdeprecated-declarations' '-Wdesignated-init'
'-Wdisabled-optimization' '-Wdiscarded-array-qualifiers'
'-Wdiscarded-qualifiers' '-Wdiv-by-zero' '-Wdouble-promotion' '-Wempty-body'
'-Wendif-labels' '-Wenum-compare' '-Wextra' '-Wformat-contains-nul'
'-Wformat-extra-args' '-Wformat-security' '-Wformat-signedness' '-Wformat-y2k'
'-Wformat-zero-length' '-Wfree-nonheap-object' '-Wignored-qualifiers'
'-Wimplicit' '-Wimplicit-function-declaration' '-Wimplicit-int'
'-Wincompatible-pointer-types' '-Winit-self' '-Wint-conversion'
'-Wint-to-pointer-cast' '-Winvalid-memory-model' '-Winvalid-pch'
'-Wjump-misses-init' '-Wlogical-not-parentheses' '-Wlogical-op' '-Wmain'
'-Wmaybe-uninitialized' '-Wmemset-transposed-args' '-Wmissing-braces'
'-Wmissing-declarations' '-Wmissing-include-dirs' '-Wmissing-parameter-type'
'-Wmissing-prototypes' '-Wmultichar' '-Wnarrowing' '-Wnested-externs'
'-Wnonnull' '-Wodr' '-Wold-style-declaration' '-Wold-style-definition'
'-Wopenmp-simd' '-Woverflow' '-Wpacked' '-Wpacked-bitfield-compat'
'-Wparentheses' '-Wpointer-arith' '-Wpointer-sign' '-Wpointer-to-int-cast'
'-Wpragmas' '-Wpsabi' '-Wreturn-local-addr' '-Wreturn-type' '-Wsequence-point'
'-Wshift-count-negative' '-Wshift-count-overflow' '-Wsizeof-array-argument'
'-Wsizeof-pointer-memaccess' '-Wstrict-aliasing' '-Wstrict-prototypes'
'-Wsuggest-attribute=format' '-Wsuggest-attribute=noreturn'
'-Wsuggest-final-methods' '-Wsuggest-final-types' '-Wswitch-bool'
'-Wtrampolines' '-Wtrigraphs' '-Wuninitialized' '-Wunknown-pragmas' '-Wunused'
'-Wunused-but-set-parameter' '-Wunused-but-set-variable' '-Wunused-function'
'-Wunused-label' '-Wunused-local-typedefs' '-Wunused-macros' '-Wunused-result'
'-Wunused-value' '-Wunused-variable' '-Wvarargs' '-Wvariadic-macros'
'-Wvector-operation-performance' '-Wvolatile-register-var' '-Wwrite-strings'
'-Warray-bounds=2' '-Wnormalized=nfc' '-Wredundant-decls'
'-Wno-missing-field-initializers' '-Wno-override-init' '-Wno-sign-compare'
'-Wno-type-limits' '-Wno-unused-parameter' '-Wno-format-nonliteral' '-g3' '-O2'
'-mtune=generic' '-march=x86-64'
as -v -I . -I . -I ../lib -I ../lib --64 -o emacs-module.o emacs-module.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-D' 'emacs' '-I' '.' '-I' '.' '-I'
'../lib' '-I' '../lib' '-pthread' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
'-isystem' '/usr/include/gtk-3.0' '-isystem' '/usr/include/gio-unix-2.0/'
'-isystem' '/usr/include/mirclient' '-isystem' '/usr/include/mircore'
'-isystem' '/usr/include/mircookie' '-isystem' '/usr/include/cairo' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/harfbuzz' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/atk-1.0' '-isystem'
'/usr/include/cairo' '-isystem' '/usr/include/pixman-1' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/gdk-pixbuf-2.0' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
'-isystem' '/usr/include/freetype2' '-isystem' '/usr/include/libpng12'
'-isystem' '/usr/include/libxml2' '-pthread' '-isystem'
'/usr/include/webkitgtk-4.0' '-isystem' '/usr/include/gtk-3.0' '-isystem'
'/usr/include/at-spi2-atk/2.0' '-isystem' '/usr/include/at-spi-2.0' '-isystem'
'/usr/include/dbus-1.0' '-isystem' '/usr/lib/x86_64-linux-gnu/dbus-1.0/include'
'-isystem' '/usr/include/gtk-3.0' '-isystem' '/usr/include/gio-unix-2.0/'
'-isystem' '/usr/include/mirclient' '-isystem' '/usr/include/mircore'
'-isystem' '/usr/include/mircookie' '-isystem' '/usr/include/cairo' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/harfbuzz' '-isystem'
'/usr/include/pango-1.0' '-isystem' '/usr/include/atk-1.0' '-isystem'
'/usr/include/cairo' '-isystem' '/usr/include/pixman-1' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/gdk-pixbuf-2.0' '-isystem' '/usr/include/libpng12' '-isystem'
'/usr/include/libsoup-2.4' '-isystem' '/usr/include/libxml2' '-isystem'
'/usr/include/webkitgtk-4.0' '-isystem' '/usr/include/glib-2.0' '-isystem'
'/usr/lib/x86_64-linux-gnu/glib-2.0/include' '-pthread' '-isystem'
'/usr/include/glib-2.0' '-isystem' '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
'-isystem' '/usr/include/glib-2.0' '-isystem'
'/usr/lib/x86_64-linux-gnu/glib-2.0/include' '-isystem'
'/usr/include/freetype2' '-isystem' '/usr/include/freetype2' '-MMD' '-MF'
'deps/emacs-module.d' '-MP' '-isystem' '/usr/include/p11-kit-1' '-fno-common'
'-Wabi' '-Waddress' '-Waggressive-loop-optimizations' '-Wall' '-Wattributes'
'-Wbool-compare' '-Wbuiltin-macro-redefined' '-Wcast-align' '-Wchar-subscripts'
'-Wchkp' '-Wclobbered' '-Wcomment' '-Wcoverage-mismatch' '-Wcpp' '-Wdate-time'
'-Wdeprecated' '-Wdeprecated-declarations' '-Wdesignated-init'
'-Wdisabled-optimization' '-Wdiscarded-array-qualifiers'
'-Wdiscarded-qualifiers' '-Wdiv-by-zero' '-Wdouble-promotion' '-Wempty-body'
'-Wendif-labels' '-Wenum-compare' '-Wextra' '-Wformat-contains-nul'
'-Wformat-extra-args' '-Wformat-security' '-Wformat-signedness' '-Wformat-y2k'
'-Wformat-zero-length' '-Wfree-nonheap-object' '-Wignored-qualifiers'
'-Wimplicit' '-Wimplicit-function-declaration' '-Wimplicit-int'
'-Wincompatible-pointer-types' '-Winit-self' '-Wint-conversion'
'-Wint-to-pointer-cast' '-Winvalid-memory-model' '-Winvalid-pch'
'-Wjump-misses-init' '-Wlogical-not-parentheses' '-Wlogical-op' '-Wmain'
'-Wmaybe-uninitialized' '-Wmemset-transposed-args' '-Wmissing-braces'
'-Wmissing-declarations' '-Wmissing-include-dirs' '-Wmissing-parameter-type'
'-Wmissing-prototypes' '-Wmultichar' '-Wnarrowing' '-Wnested-externs'
'-Wnonnull' '-Wodr' '-Wold-style-declaration' '-Wold-style-definition'
'-Wopenmp-simd' '-Woverflow' '-Wpacked' '-Wpacked-bitfield-compat'
'-Wparentheses' '-Wpointer-arith' '-Wpointer-sign' '-Wpointer-to-int-cast'
'-Wpragmas' '-Wpsabi' '-Wreturn-local-addr' '-Wreturn-type' '-Wsequence-point'
'-Wshift-count-negative' '-Wshift-count-overflow' '-Wsizeof-array-argument'
'-Wsizeof-pointer-memaccess' '-Wstrict-aliasing' '-Wstrict-prototypes'
'-Wsuggest-attribute=format' '-Wsuggest-attribute=noreturn'
'-Wsuggest-final-methods' '-Wsuggest-final-types' '-Wswitch-bool'
'-Wtrampolines' '-Wtrigraphs' '-Wuninitialized' '-Wunknown-pragmas' '-Wunused'
'-Wunused-but-set-parameter' '-Wunused-but-set-variable' '-Wunused-function'
'-Wunused-label' '-Wunused-local-typedefs' '-Wunused-macros' '-Wunused-result'
'-Wunused-value' '-Wunused-variable' '-Wvarargs' '-Wvariadic-macros'
'-Wvector-operation-performance' '-Wvolatile-register-var' '-Wwrite-strings'
'-Warray-bounds=2' '-Wnormalized=nfc' '-Wredundant-decls'
'-Wno-missing-field-initializers' '-Wno-override-init' '-Wno-sign-compare'
'-Wno-type-limits' '-Wno-unused-parameter' '-Wno-format-nonliteral' '-g3' '-O2'
'-mtune=generic' '-march=x86-64'
>From gcc-bugs-return-614788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 11:22:51 2018
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From: "minshall at acm dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87242] optimize -O2 incorrect output
Date: Thu, 06 Sep 2018 11:22:00 -0000
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--- Comment #1 from Greg Minshall <minshall at acm dot org> ---
sorry, the attachment is too long (4MB).
is there any tool for whittling away the unnecessary bits, given a .c file --
i'd create by -E, though maybe the .i file would work? -- and a target function
-- i.e., the closure of all the references in the target function?
>From gcc-bugs-return-614789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 11:58:38 2018
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Thu, 06 Sep 2018 11:58:00 -0000
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--- Comment #16 from dave.anglin at bell dot net ---
On 2018-09-05 7:38 PM, dave.anglin at bell dot net wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
>
> --- Comment #15 from dave.anglin at bell dot net ---
> On 2018-09-05 7:21 PM, dave.anglin at bell dot net wrote:
>> Doing a "&" operation on a function pointer looks bad.
> No, I misread this line "_12 = SR.13_1 == operator!=;". It looks like
> an expand problem.
We only get canonicalization of function pointers when we expand using
do_compare_and_jump().
In the ifcombine pass, we transform the operation to "_12 = SR.13_1 ==
operator!=;". I believe this
expands to one of the scc patterns without canonicalization.
>From gcc-bugs-return-614790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 13:21:10 2018
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From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87243] New: FSF needs to use xcrun on darwin18 to find system headers in SDK
Date: Thu, 06 Sep 2018 13:21:00 -0000
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Bug ID: 87243
Summary: FSF needs to use xcrun on darwin18 to find system
headers in SDK
Product: gcc
Version: 9.0
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The Xcode 10 release on 10.14 deprecates the presence of the system headers in
/ such that the Command Line Tools package no longer installs a /usr/include
directory. While Apple is providing a fall back header package to install the
SDK in /, this will be dropped in a future macOS release.
The Apple clang compilers aren't explicitly patched to address this issue.
Rather the compiler stubs in /usr/bin execute the compilers in the Xcode
application and the Command Line Tools via the xcrun program which sets the
SDKROOT environmental appropriately. Since installing compiler wrappers to do
this for FSF gcc would be problematic for the other targets, the better
approach would be to have the header search path enhanced to default to
-iwithsysroot `xcrun --sdk macosx --show-sdk-path` for FSF gcc.
>From gcc-bugs-return-614791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 13:48:48 2018
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Subject: [Bug target/87243] FSF needs to use xcrun on darwin18 to find system headers in SDK
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--- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
I am strongly against making GCC's configure depend on xcrun. It is quite
possible that GCC could be used, for example, with PureDarwin - or on systems
without any Xcode install (using headers built from the OpenSource packages).
So, yes we have to find a solution to finding the headers,
but no, (at least I don't agree) that trying into yet another tool we don't
control is that solution.
>From gcc-bugs-return-614792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 14:04:19 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87243] FSF needs to use xcrun on darwin18 to find system headers in SDK
Date: Thu, 06 Sep 2018 14:04:00 -0000
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--- Comment #2 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Iain Sandoe from comment #1)
> I am strongly against making GCC's configure depend on xcrun. It is quite
> possible that GCC could be used, for example, with PureDarwin - or on
> systems without any Xcode install (using headers built from the OpenSource
> packages).
>
> So, yes we have to find a solution to finding the headers,
> but no, (at least I don't agree) that trying into yet another tool we don't
> control is that solution.
The problem is finding a mechanism which doesn't use Apple's xcrun yet still
allows you to find the SDK since the location of Xcode.app can change with
renaming and hence the location of the SDK.
>From gcc-bugs-return-614793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 15:19:59 2018
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Subject: [Bug target/87243] FSF needs to use xcrun on darwin18 to find system headers in SDK
Date: Thu, 06 Sep 2018 15:19:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #1)
> I am strongly against making GCC's configure depend on xcrun. It is quite
> possible that GCC could be used, for example, with PureDarwin - or on
> systems without any Xcode install (using headers built from the OpenSource
> packages).
>
> So, yes we have to find a solution to finding the headers,
> but no, (at least I don't agree) that trying into yet another tool we don't
> control is that solution.
It could be conditional on system version. As long as there's a fallback path
for cases where there's no xcrun, it should be okay. See for example what the
emacs configure does:
http://git.savannah.gnu.org/cgit/emacs.git/tree/configure.ac#n73
>From gcc-bugs-return-614794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 16:17:14 2018
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Subject: [Bug c/87242] optimize -O2 incorrect output
Date: Thu, 06 Sep 2018 16:17:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Greg Minshall from comment #1)
> sorry, the attachment is too long (4MB).
You can compress it, usually preprocessed source compresses nicely with either
gzip or bzip2.
>From gcc-bugs-return-614795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 16:32:13 2018
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Subject: [Bug c++/70124] alignas error in constexpr function
Date: Thu, 06 Sep 2018 16:32:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Another testcase:
#include <algorithm>
int main() {
int aa = 0;
alignas(std::max(alignof(void*), alignof(int))) int bb;
bb = 1;
}
>From gcc-bugs-return-614796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 16:40:49 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87239] ICE in deferred-length string
Date: Thu, 06 Sep 2018 16:40:00 -0000
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-06
Ever confirmed|0 |1
--- Comment #3 from janus at gcc dot gnu.org ---
I can confirm the ICE with all gfortran versions I tried (5 to trunk). Slightly
reduced test case (a separate module is not necessary):
program main
implicit none
character(3), parameter :: inp( 2 ) = [ 'aaa', 'bbb' ]
character(:), allocatable :: out(:)
out = gettwo( inp )
print *, out
contains
elemental function gettwo( s ) result( res )
character(*), intent(in) :: s
character(2) :: res
res = s(1:2)
end function
end
>From gcc-bugs-return-614797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 16:57:42 2018
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
Date: Thu, 06 Sep 2018 16:57:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-06
CC| |janus at gcc dot gnu.org
Summary|Contiguous array pointer |[8/9 Regression] Contiguous
|function result not |array pointer function
|recognized as contiguous |result not recognized as
| |contiguous
Ever confirmed|0 |1
--- Comment #1 from janus at gcc dot gnu.org ---
I can confirm the error with gfortran 8 and trunk, but I don't see it with
7.3.0 and earlier. Seems to be a regression. Slightly reduced test case:
module m
implicit none
type :: t1
contains
procedure :: get_ptr
end type
type :: t2
class(t1), allocatable :: c
end type
contains
function get_ptr(this)
class(t1) :: this
real, dimension(:), contiguous, pointer :: get_ptr
end function
subroutine test()
real, dimension(:), contiguous, pointer:: ptr
type(t2) :: x
ptr => x%c%get_ptr()
end subroutine
end module
>From gcc-bugs-return-614798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 19:47:43 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86731] [8/9 Regression] Miscompiles vec_sl at -O3 with -fwrapv on ppc64el
Date: Thu, 06 Sep 2018 19:47:00 -0000
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--- Comment #3 from Will Schmidt <willschm at gcc dot gnu.org> ---
Author: willschm
Date: Thu Sep 6 19:47:06 2018
New Revision: 264150
URL: https://gcc.gnu.org/viewcvs?rev=264150&root=gcc&view=rev
Log:
[gcc]
2018-09-06 Will Schmidt <will_schmidt@vnet.ibm.com>
PR target/86731
* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Update logic
around folding of vec_sl to handle out of range shift values.
[testsuite]
2018-08-15 Will Schmidt <will_schmidt@vnet.ibm.com>
PR target/86731
* gcc.target/powerpc/pr86731.c: New test.
* gcc.target/powerpc/pr86731-longlong.c: New test.
* gcc.target/powerpc/pr86731-fwrapv.c: New test.
* gcc.target/powerpc/pr86731-fwrapv-longlong.c: New test.
* gcc.target/powerpc/pr86731-nogimplefold.c: New test.
* gcc.target/powerpc/pr86731-nogimplefold-longlong.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr86731-fwrapv-longlong.c
trunk/gcc/testsuite/gcc.target/powerpc/pr86731-fwrapv.c
trunk/gcc/testsuite/gcc.target/powerpc/pr86731-longlong.c
trunk/gcc/testsuite/gcc.target/powerpc/pr86731-nogimplefold-longlong.c
trunk/gcc/testsuite/gcc.target/powerpc/pr86731-nogimplefold.c
trunk/gcc/testsuite/gcc.target/powerpc/pr86731.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-614799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 20:38:37 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87243] FSF needs to use xcrun on darwin18 to find system headers in SDK
Date: Thu, 06 Sep 2018 20:38:00 -0000
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--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> ---
All I'm asking is that that we describe the real bug (i.e. that we need to be
able to find the headers when they are not installed in some Well Known Place).
It should also work for -mmacosz-version-min != current system revision (and
therefore, might need to deal with finding libraries too - or else, for
example, we won't be able to build m32 exes).
-----
As it happens, I had been giving this problem some thought - a couple of years
ago.
What we don't want is to cripple Darwin's toolchain by making it call more and
more executables for each invocation.
IFF you want to configure to use the current installed Xcode - you could just
put
--with-sysroot='xcrun --sdk ... etc` on the configure line.
That doesn't solve the issue of the Xcode package being moved or the user
issuing a --xcode-select ...
... so ....
let's state the problem we want to solve and the cases we want to cover - and
then figure out how to do it. The bug is not "we must use xcrun" the bug is
"we need to find the headers under the following circumstances".
I had in mind, for the record, some scheme using symlinks in the user's home
directory (since using schemes writing into the /xxx dirs require elevated
permissions). There's still a penalty in looking up through a link c.f. direct
access to things - but it would me much less than running a second process and
parsing the output.
====
JFTR: To support non-Apple-native clang builds I have to patch the LLVM cmake
files to *avoid* the xcrun calls and use the SDk paths I want!.
>From gcc-bugs-return-614800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 21:16:20 2018
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Subject: [Bug fortran/87244] New: Failure to compile an allocate statement of variable length
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87244
Bug ID: 87244
Summary: Failure to compile an allocate statement of variable
length
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: george.mesina at inl dot gov
Target Milestone: ---
Created attachment 44666
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44666&action=edit
File being compiled, timecomp.F90, is attached
VERSION of GFORTRAN
gfortran -v
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/apps/local/easybuild/software/GCC/4.9.2/libexec/gcc/x86_64-unknown-linux-gnu/4.9.2/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --enable-languages=c,c++,fortran,lto --enable-lto
--enable-checking=release --disable-multilib --enable-shared=yes
--enable-static=yes --enable-threads=posix --enable-gold=default
--enable-plugins --enable-ld --with-plugin-ld=ld.gold
--prefix=/apps/local/easybuild/software/GCC/4.9.2
--with-local-prefix=/apps/local/easybuild/software/GCC/4.9.2 --enable-bootstrap
--with-cloog=/apps/local/easybuild/build/GCC/4.9.2/dummy-dummy/gcc-4.9.2/stage2_stuff
--with-isl=/apps/local/easybuild/build/GCC/4.9.2/dummy-dummy/gcc-4.9.2/stage2_stuff
Thread model: posix
PLATFORM:
uname -a
Linux falcon2 3.0.101-108.35-default #1 SMP Mon Feb 19 21:13:08 UTC 2018
(251ec24) x86_64 x86_64 x86_64 GNU/Linux
COMMAND
gfortran -Wall -Wconversion -pedantic -fbounds-check -fbacktrace
-fdefault-integer-8 -fdefault-real-8 -c -g -O2 -o timecomp.x timecomp.F90
timecomp.F90: In function ‘getfiledata’:
timecomp.F90:209:0: internal compiler error: Segmentation fault
allocate (fnames(10+nlines), source = blanks)
^
0x9a066f crash_signal
../../gcc/toplev.c:337
0x7f4100 fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../gcc/fold-const.c:1952
0x68021f gfc_array_init_size
../../gcc/fortran/trans-array.c:5085
0x68021f gfc_array_allocate(gfc_se*, gfc_expr*, tree_node*, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node**, gfc_expr*, gfc_typespec*)
../../gcc/fortran/trans-array.c:5237
0x6c8859 gfc_trans_allocate(gfc_code*)
../../gcc/fortran/trans-stmt.c:4952
0x6740c7 trans_code
../../gcc/fortran/trans.c:1794
0x6c0973 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:986
0x6c672a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1017
0x6741a7 trans_code
../../gcc/fortran/trans.c:1736
0x69366b gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:5653
0x693907 gfc_generate_contained_functions
../../gcc/fortran/trans-decl.c:4771
0x693907 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:5589
0x6333d0 translate_all_program_units
../../gcc/fortran/parse.c:4953
0x6333d0 gfc_parse_file()
../../gcc/fortran/parse.c:5150
0x6703a5 gfc_be_parse_file
../../gcc/fortran/f95-lang.c:212
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
File being compiled, timecomp.F90, is attached.
>From gcc-bugs-return-614801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 21:29:09 2018
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From: "poppeter1982 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87241] A hang problem for c++filt
Date: Thu, 06 Sep 2018 21:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87241
--- Comment #2 from Li Peng <poppeter1982 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> __cxa_demangle in cp-demangle.c correctly returns -2 (the mangled name is
> not valid) but cplus_demangle in cplus-dem.c tries to allocate crazy amounts
> of memory.
So you can confirm this is a bug, right?
>From gcc-bugs-return-614802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 22:14:13 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87244] Failure to compile an allocate statement of variable length
Date: Thu, 06 Sep 2018 22:14:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
Your code compiles and executes with gfortran versions
6.4.1, 7.3.1, 8.1.1, and 9.0.0.
troutmask:sgk[205] gfcx -o z a.f90 && ./z
0******** Failure to open file: filenames
STOP timecomp:first open
troutmask:sgk[206] gfc8 -o z a.f90 && ./z
0******** Failure to open file: filenames
STOP timecomp:first open
troutmask:sgk[207] gfc7 -o z a.f90 && ./z
0******** Failure to open file: filenames
STOP timecomp:first open
troutmask:sgk[208] gfc6 -o z a.f90 && ./z
0******** Failure to open file: filenames
STOP timecomp:first open
Version 4.9.2 is no loner supported. I suggest you
(or your organization) update to supported version
of gfortran.
>From gcc-bugs-return-614803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 06 22:15:29 2018
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Subject: [Bug fortran/87244] Failure to compile an allocate statement of variable length
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from kargl at gcc dot gnu.org ---
As 4.9.2 is no longer under development, closing as WONTFIX.
>From gcc-bugs-return-614804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 00:50:53 2018
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |rsandifo at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing gen* maintainer for his opinion
>From gcc-bugs-return-614805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 00:54:16 2018
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Subject: [Bug bootstrap/78893] gcc-6.3.0 build fails on genattrtab on CentOS 7
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to William Bader from comment #3)
> Thanks! Increasing the allocated memory fixed the problem, and the gcc build
> completed. Regards, William
>
> $ /usr/bin/free -h
> total used free shared buff/cache
> available
> Mem: 1.8G 240M 941M 28M 658M
> 1.3G
> Swap: 1.0G 81M 943M
OK, closing this then.
>From gcc-bugs-return-614806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 00:58:40 2018
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Subject: [Bug other/46489] tree optimizer and frontend files use target macros
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Joseph S. Myers from comment #7)
> FWIW, the following files include tm.h and appear not to have any direct
> uses of target macros, or uses of the most common headers (such as rtl.h or
> cp-tree.h) that depend on tm.h. They require more careful checks of what
> headers they are using for any hidden tm.h dependencies, but may be good
> candidates for the removal of tm.h includes.
>
> gcc/java/except.c
> gcc/java/jvgenmain.c
> gcc/java/jvspec.c
> gcc/java/mangle.c
> gcc/java/zextract.c
I don't know about the rest of them, but these at least are gone.
>From gcc-bugs-return-614807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:01:16 2018
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Subject: [Bug bootstrap/56954] Bootstrap failure: ./auto-host.h:1994:16: error: declaration does not declare anything [-fpermissive]
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Does this still happen with newer GCC versions?
>From gcc-bugs-return-614808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:03:20 2018
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Subject: [Bug bootstrap/37013] gcc-4.2.1 build breaks in fortran when using --with-mpfrDate: Fri, 07 Sep 2018 01:03:00 -0000
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #5)
> GCC 4.2 is no longer maintained. Has the problem cleared up for you in more
> recent (and currently maintained) versions of GCC?
No reply, so I'm going to close this.
>From gcc-bugs-return-614809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:06:09 2018
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Subject: [Bug bootstrap/58828] Problem compiling gcc 4.8.2 using gcc 4.4.6
Date: Fri, 07 Sep 2018 01:06:00 -0000
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Daniel Fruzynski from comment #3)
> OK, I found it. I used script symlink-tree (distributed with binutils) to
> create symlinks to binutils in gcc source dir. This script removed some gcc
> source files and replaced them with symlinks to corresponding files in
> binutils dir. I assumed that it will help me, but it created more problems.
>
> I am building gcc without binutils symlinked, and build is on stage 2 now.
> Look that it will complete successfully.
>
> I think that dedicated script to symlink all binutils into gcc dir would be
> useful. Could you create one?
"You" as in Richard or Ian?
>From gcc-bugs-return-614810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:23:40 2018
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Subject: [Bug target/55523] gencondmd C++ conversion breaks peephole2 predicates use of get_attr_*
Date: Fri, 07 Sep 2018 01:23:00 -0000
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
Does this still happen with newer gcc versions?
>From gcc-bugs-return-614811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:25:25 2018
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Subject: [Bug target/61024] nios2-rtems4.11 build of 4.9.0 fails on FreeBSD 10 c++ (clang).
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| |sandra at codesourcery dot com
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing other nios maintainer
>From gcc-bugs-return-614812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:28:05 2018
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Subject: [Bug driver/35532] Native GCC no longer searches $prefix/lib for startfiles when run from $objdir
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--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Earnie from comment #15)
> I know this is old but I have a similar issue with 2.8.1 in building a
> native MinGW build.
You mean 4.8.1? Anyways that's old now too; are you still seeing the issue?
>From gcc-bugs-return-614813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:31:18 2018
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Subject: [Bug bootstrap/56703] problems with strsignal and maybe strstr due to varying const on return type
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Yves Caniou from comment #4)
> I have the same issue with gcc-4.8.2 compiling gcc-4.8.2, on a Intel(R)
> Xeon(R) CPU E5-2630 0 @ 2.30GHz.
What about with a newer, still-supported version?
>From gcc-bugs-return-614814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:32:32 2018
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Subject: [Bug tree-optimization/87245] New: [missed optimization] switching on indices of struct members
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Consider a simple struct whose members can be accessed by name or by index:
struct vec {double x,y,z;};
double get(const struct vec *v,unsigned long i) {
switch(i) {
case 0: return v->x;
case 1: return v->y;
case 2: return v->z;
}
}
Godbolt's trunk x86_64 build produces at -O3
get:
cmpq $1, %rsi
ja .L2
je .L11
movsd (%rdi), %xmm0
ret
.L2:
cmpq $2, %rsi
jne .L12
movsd 16(%rdi), %xmm0
ret
.L11:
movsd 8(%rdi), %xmm0
ret
.L12:
ret
when of course
get:
movsd (%rdi,%rsi,8), %xmm0
ret
would suffice. (Apologies if I picked the wrong -optimization component.)
Bonus points for collapsing
double get(const struct vec *arr,unsigned long i) {
arr+=i/3;
switch(i%3) {
case 0: return arr->x;
case 1: return arr->y;
case 2: return arr->z;
}
}
to the same two instructions.
>From gcc-bugs-return-614815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:35:19 2018
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Subject: [Bug other/50582] Instruct GCC that added_clobbers_hard_reg_p shouldn't consider a specific register
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paulo J. Matos from comment #2)
> Created attachment 25389 [details]
> Patch for GCC 4.6.1 implementing suggested enhancement
(In reply to Paulo J. Matos from comment #3)
> Created attachment 25420 [details]
> Allows reload to remove trivial insn
>
> I noticed that reload was failing to remove insn of the form:
> (parallel [(set rX rX) (clobber RCC)])
>
> Attached is a patch that does this. Removes move instructions whose clobber,
> clobbers registers defined in NOT_REALLY_HARD_REG.
Do these patches still apply against trunk? If so, please submit to gcc-patches
for review.
>From gcc-bugs-return-614816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:38:29 2018
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |egallager at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Valeriy E. Ushakov from comment #6)
> (In reply to Oleg Endo from comment #5)
> > BTW, those two patterns do not exist anymore in trunk, as SH5 stuff has been
> > removed.
>
> Yes, but that just masks the bug that L/LL selection is done in wrong
> context.
OK, so what would be a better way to word the title then, such that it doesn't
mention an obsolete target?
>From gcc-bugs-return-614817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 01:56:12 2018
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Subject: [Bug target/61024] nios2-rtems4.11 build of 4.9.0 fails on FreeBSD 10 c++ (clang).
Date: Fri, 07 Sep 2018 01:56:00 -0000
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--- Comment #3 from sandra at gcc dot gnu.org ---
I believe this issue should be closed, as RTEMS support for Nios II was
committed back in July 2014.
https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02124.html
That patch provided the missing definition for TARGET_LINUX_ABI, among other
things.
>From gcc-bugs-return-614818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:08:06 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87233] Constraint C1279 still followed after f2008 standard revision (?)
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to kargl from comment #2)
> (In reply to Jerry DeLisle from comment #1)
> > The check is easy enough to delete:
> >
--- snip ---
> What happens with -std=f95 and -std=f2003?
>
> --
> steve
Well obviously we dont have the hooks for f95 and f2003. AFAICT the code looks
acceptable per my read of f2008. So if we want to provide different levels of
diagnostics for the various version standards, I can add the hooks. It
frustrates me since I feel like we are constantly chasing rabbits down the
rabit holes with these things. It would be nice if people just would conform to
the current standard, in this case it is more forgiving to to so.
>From gcc-bugs-return-614819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:13:37 2018
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Subject: [Bug target/61024] nios2-rtems4.11 build of 4.9.0 fails on FreeBSD 10 c++ (clang).
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to sandra from comment #3)
> I believe this issue should be closed, as RTEMS support for Nios II was
> committed back in July 2014.
>
> https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02124.html
>
> That patch provided the missing definition for TARGET_LINUX_ABI, among other
> things.
OK cool.
>From gcc-bugs-return-614820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:14:50 2018
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Subject: [Bug driver/35532] Native GCC no longer searches $prefix/lib for startfiles when run from $objdir
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>From gcc-bugs-return-614821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:25:11 2018
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Subject: [Bug target/69427] gcc-4.9.3 compilation for the cross target m68k-rtems4.11 in i686-Cygwin
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Does this still happen with newer versions of GCC?
No reply; guessing not
>From gcc-bugs-return-614822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:26:36 2018
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Subject: [Bug target/38093] undefined predicates in bfin.md
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Kueifong Li from comment #0)
> This is my system information,
>
> FreeBSD cowboy.branda.to 8.0-CURRENT FreeBSD 8.0-CURRENT #7: Fri Oct 17
> 22:32:29 CST 2008
> thinker@cowboy.branda.to:/usr/src/sys/i386/compile/cowboy i386
>
> My configuration command is
>
> ../configure --prefix=/home/thinker/tmp/dest \
> --target=bfin-unknown-elf --host=i386-unknown-freebsd8.0 \
> --with-gmp=/usr/local --disable-libssp
>
> But, genrecog is core dumped when making cross-compiler for bfin target. It
> can be fixed by a small patch following.
>
> begin 644 bfin-predicates.diff
> M9&EF9B`M<B!C964R-3@Q8C0W-3<@9V-C+V-O;F9I9R]B9FEN+V)F:6XN8PHM
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> M,3(@,C,Z,3@Z,3@@,C`P."`K,#@P,`I`0"`M,3<L-B`K,3<L,30@0$`*(#L[
> M(%EO=2!S:&]U;&0@:&%V92!R96-E:79E9"!A(&-O<'D@;V8@=&AE($=.52!'
> M96YE<F%L(%!U8FQI8R!,:6-E;G-E"B`[.R!A;&]N9R!W:71H($=#0SL@<V5E
> M('1H92!F:6QE($-/4%E)3D<S+B`@268@;F]T('-E90H@.SL@/&AT='`Z+R]W
> M=W<N9VYU+F]R9R]L:6-E;G-E<R\^+@HK"BLH9&5F:6YE7W!R961I8V%T92`B
> M<'5S:%]M=6QT:7!L95]O<&5R871I;VXB"BL@("AA;F0@*&UA=&-H7V-O9&4@
> M(G!A<F%L;&5L(BD**R`@("`@("`H;6%T8VA?=&5S="`B7W!U<VA?;75L=&EP
> M;&5?;W!E<F%T:6]N*&]P+"!M;V1E*2(I*2D**PHK*&1E9FEN95]P<F5D:6-A
> M=&4@(G!O<%]M=6QT:7!L95]O<&5R871I;VXB"BL@("AA;F0@*&UA=&-H7V-O
> M9&4@(G!A<F%L;&5L(BD**R`@("`@("`H;6%T8VA?=&5S="`B7W!O<%]M=6QT
> M:7!L95]O<&5R871I;VXH;W`L(&UO9&4I(BDI*0H@"B`[.R!2971U<FX@;F]N
> M>F5R;R!I9F8@3U`@:7,@;VYE(&]F('1H92!I;G1E9V5R(&-O;G-T86YT<R`Q
> M(&]R(#(N"B`H9&5F:6YE7W!R961I8V%T92`B<&]S7W-C86QE7V]P97)A;F0B
> !"@``
> `
> end
That patch looks like binary; are you sure it's really a patch?
>From gcc-bugs-return-614823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 02:27:27 2018
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Subject: [Bug rtl-optimization/71596] gcc bootstrap fails due to segv in genrecog
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
Severity|normal |enhancement
--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> Dropping the regression mark, as it isn't really a regression, just missing
> enhancement.
Changing importance then.
>From gcc-bugs-return-614824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:20:03 2018
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Subject: [Bug target/38093] undefined predicates in bfin.md
Date: Fri, 07 Sep 2018 03:20:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> That patch looks like binary; are you sure it's really a patch?
It is uuencoded. And yes a text file will look that funny as uuencoded file.
>From gcc-bugs-return-614825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:20:57 2018
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Subject: [Bug other/29442] insn-attrtab has grown too large
Date: Fri, 07 Sep 2018 03:20:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #20 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #19)
> (In reply to comment #18)
> > (In reply to comment #15)
> > Meanwhile Jakub implemented a different mean which doesn't call the get_attr_
> > functions dynamically more often (which my approach potentially does), but
> > which as result isn't nearly as effective in reducing size and compile and
> > generation time.
>
> For reducing compile time (but not size/generation), we could just use the
> cache vars with some magic unset value (probably the cache vars would need
> to be int
> instead of enum for that). Then if genattrtab finds out that there is no
> dominating call to the get_attr_* function, but still potentially for one
> insn the same get_attr_* might be called more than once in certain code
> path, then
> for that code path it could just use (cache_FOO != -1 ? (enum ...) cache_FOO
> : (cache_FOO = get_attr_FOO (...))).
If these are things that could still be done, would it make sense to reopen
this bug, or open a new one for them?
>From gcc-bugs-return-614826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:24:48 2018
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Subject: [Bug bootstrap/84402] [meta] GCC build system: parallelism bottleneck
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-07
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--- Comment #24 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #23)
> I can easily split insn-emit.c. Once we know which was a split should be
> done, I can prepare patch for that.
Confirmed, please do this!
>From gcc-bugs-return-614827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:28:21 2018
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Subject: [Bug c++/84726] [8 regression] Unnecessary lambda capture of constant variables
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Pádraig Brady <P at draigBrady dot com> changed:
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--- Comment #4 from Pádraig Brady <P at draigBrady dot com> ---
Note bug 87185, mentions this snippet which is currently not handled by this
change:
void f() { const int i=0; [&]() noexcept {i;}; }
Specifically the "noexcept" causes non traversal of the statements, and thus
"i" remains captured in this example.
>From gcc-bugs-return-614828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:32:29 2018
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Subject: [Bug rtl-optimization/55531] peephole2 pattern with multiple insns with match_parallel insn causes corrupted peephole2_insns matching function
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
so this is... what, wrong-code? ice-on-valid-code? build?
(I should go to bed instead of trying to figure this out...)
>From gcc-bugs-return-614829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 03:33:19 2018
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Subject: [Bug target/58442] bootstrapping vax crashes on NetBSD
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Husemann from comment #10)
> Matt Thomas suggested to go with the easy solution for now: protect the
> calls with MEM_P, i.e.: change the ! mode_dependent_address_p() in the
> bitfield patterns to
>
> (MEM_P(..) && ! mode_dependent_address_p(...))
>
> With this change, a NetBSD kernel can be compiled (but does not yet boot),
> and bootstrap goes way further along (will file another ticket for the next
> obstacle).
Did you ever file that other ticket?
>From gcc-bugs-return-614830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 04:43:04 2018
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Subject: [Bug rtl-optimization/87246] New: [6/7/8/9 Regression] ICE in decompose_normal_address, at rtlanal.c:6379
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Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-9.0.0-alpha20180902 snapshot (r264045), gcc 8.2, 7.3, 6.3 all ICE when
compiling the following snippet w/ -O2 (-O3, -Ofast) -fnon-call-exceptions
-fno-split-wide-types:
__int128 zd;
int c1;
void
s2 (__int128 *qv)
{
if (*qv != 0)
{
zd = 0;
c1 = c1 <= *qv;
}
}
void
lt (unsigned int vb)
{
s2 (vb + 1);
}
% x86_64-pc-linux-gnu-gcc-9.0.0-alpha20180902 -O2 -fnon-call-exceptions
-fno-split-wide-types -w -c anha8p3i.c
during RTL pass: reload
anha8p3i.c: In function 'lt':
anha8p3i.c:18:1: internal compiler error: in decompose_normal_address, at
rtlanal.c:6379
18 | }
| ^
0x649cdf decompose_normal_address
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/rtlanal.c:6379
0x649cdf decompose_address(address_info*, rtx_def**, machine_mode, unsigned
char, rtx_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/rtlanal.c:6456
0xb48c09 process_address_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/lra-constraints.c:3279
0xb4a942 process_address
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/lra-constraints.c:3550
0xb4a942 curr_insn_transform
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/lra-constraints.c:3865
0xb4d6ea lra_constraints(bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/lra-constraints.c:4906
0xb3b2c4 lra(_IO_FILE*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/lra.c:2446
0xaf3461 do_reload
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/ira.c:5469
0xaf3461 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180902/gcc/ira.c:5653
>From gcc-bugs-return-614831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 06:01:25 2018
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Subject: [Bug libfortran/87247] New: intrinsic acosh violates 2008 Standard rule 13.7.5 line 5
Date: Fri, 07 Sep 2018 06:01:00 -0000
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Bug ID: 87247
Summary: intrinsic acosh violates 2008 Standard rule 13.7.5
line 5
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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! Intrinsic acosh violates 2008 Standard rule 13.7.5 line 5
! "If the result is complex the imaginary part is expressed in radians and lies
! in the range 0<= AIMAG(ACOSH(X)) <= pi" pi is approx 3.14
! Imaginary part must be >=0 and <= pi so it may not be negative
complex :: cc=(-1.0,-1.0)
print *,acosh(cc) ! Imaginary part negative
print *,log(cc+sqrt(cc**2-1)) ! this is correct acosh(cc)
end
(1.06127512,-2.23703575)
(-1.06127524,2.23703575)
Fortran acosh provides negative of correct answer.
>From gcc-bugs-return-614832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 06:51:36 2018
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
Date: Fri, 07 Sep 2018 06:51:00 -0000
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--- Comment #21 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Actually, did the commits by Andre in May resolve this issue, or is there still
something left open?
>From gcc-bugs-return-614833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 07:47:14 2018
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From: "matthew.hambley at metoffice dot gov.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/84554] make check: FAIL: tversion: ERROR! The versions of gmp.h (5.0.5) and libgmp (4.3.1) do not match.
Date: Fri, 07 Sep 2018 07:47:00 -0000
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--- Comment #3 from matthew.hambley at metoffice dot gov.uk ---
> That shouldn't be possible, because by using contrib/download_prerequisites GCC
> will link to a static in-tree libgmp.a and so doesn't need any libgmp.so at
> all.
That was my understanding.
> Do you have any odd environment variables that would be forcing it to link to
> the shared library?
Not as far as I'm aware. What would count as odd?
I tried unsetting LD_LIBRARY_PATH and cutting PATH down to
/bin:/usr/bin:/usr/local/bin
What else did you have in mind?
>From gcc-bugs-return-614834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 07:52:49 2018
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Subject: [Bug bootstrap/32497] Crosscomiling native sh3 gcc on a 64-bit host fails
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--- Comment #8 from Valeriy E. Ushakov <uwe at netbsd dot org> ---
I don't understand. The title mentions sh3, which is not obsolete.
It's been 11 (eleven!) years. As far as I know this patch (adjusted to catch
up with the changes, but essentially the same) is still necessary for gcc 6.4
that is the compiler in NetBSD-current.
>From gcc-bugs-return-614835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 08:09:53 2018
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Subject: [Bug c/87248] New: Bad code for masked operations involving signed ints
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Bug ID: 87248
Summary: Bad code for masked operations involving signed ints
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I am always wary of saying there might be a compiler bug - usually it is a bug
in the user code. But this time I am very suspicious. The example here comes
from a discussion in the comp.lang.c Usenet group.
Here is the code I have been testing:
unsigned char foo_u(unsigned int v) {
return (v & 0x7f) | (v & ~0x7f ? 0x80 : 0);
}
unsigned char foo_s(int v) {
return (v & 0x7f) | (v & ~0x7f ? 0x80 : 0);
}
unsigned char bar_s(int v) {
int x = v & ~0x7f;
return (v & 0x7f) | (x ? 0x80 : 0);
}
int test_u_1(void) {
return foo_u(0x01); // Expect 0x01 = 1
}
int test_u_2(void) {
return foo_u(0x1001); // Expect 0x81 = 129
}
int test_s_1(void) {
return foo_s(0x01); // Expect 0x01 = 1
}
int test_s_2(void) {
return foo_s(0x1001); // Expect 0x81 = 129
}
The assembly code generated for this is:
foo_u(unsigned int):
mov eax, edi
mov edx, edi
or edx, -128
and eax, 127
and edi, -128
cmovne eax, edx
ret
foo_s(int):
mov eax, edi
ret
bar_s(int):
mov eax, edi
mov edx, edi
or edx, -128
and eax, 127
and edi, 127
cmovne eax, edx
ret
test_u_1():
mov eax, 1
ret
test_u_2():
mov eax, 129
ret
test_s_1():
mov eax, 1
ret
test_s_2():
mov eax, 1
ret
When the code uses "int" rather than "unsigned int", in "foo_s", the compiler
thinks the function can be optimised to a simple byte extraction. I cannot see
how that interpretation is valid. And gcc cannot see it either, if there is an
intermediate variable (in "bar_s"). (The type of the intermediate "x" in
"bar_s" does not matter - "int", "unsigned int", "auto", "__auto_type", const
or not).
This effect is happening in the front-end. It is independent of optimisation
levels (-O gives the same results), the target processor (I tried a half-dozen
targets), the compiler version (from gcc 4.4 upwards - gcc 4.1 gives the same
code for foo_s as foo_u. I haven't tried gcc 4.2 or 4.3). There are minor
variations in the generated code (such as the use of conditional move
instructions) between different versions - those don't affect the results. The
"-fwrapv" flag has no effect either, nor does the choice of C or C++.
The results from the compiler evaluations in the "test_" functions shows that
it this happens in the compiler analysis - it is not a code generation issue.
(<https://godbolt.org> is great for this kind of testing!)
(This bug report was first sent to the mailing list
<https://gcc.gnu.org/ml/gcc/2018-09/msg00028.html> - the report here has a few
minor corrections.)
>From gcc-bugs-return-614836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 08:45:49 2018
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Subject: [Bug c++/87241] A hang problem for c++filt
Date: Fri, 07 Sep 2018 08:45:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, that's why I changed the status from UNCONFIRMED to NEW.
>From gcc-bugs-return-614837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 09:59:16 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/58828] Problem compiling gcc 4.8.2 using gcc 4.4.6
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--- Comment #5 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
(In reply to Eric Gallager from comment #4)
> (In reply to Daniel Fruzynski from comment #3)
> > OK, I found it. I used script symlink-tree (distributed with binutils) to
> > create symlinks to binutils in gcc source dir. This script removed some gcc
> > source files and replaced them with symlinks to corresponding files in
> > binutils dir. I assumed that it will help me, but it created more problems.
> >
> > I am building gcc without binutils symlinked, and build is on stage 2 now.
> > Look that it will complete successfully.
> >
> > I think that dedicated script to symlink all binutils into gcc dir would be
> > useful. Could you create one?
>
> "You" as in Richard or Ian?
I meant someone from gcc or binutils team who is responsible for this area.
BTW, now gcc is shipped with contrib/download_prerequisites script which
handles all this stuff, so you may close this issue if you want.
>From gcc-bugs-return-614838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 10:08:21 2018
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From: "eftaxi12 at otenet dot gr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87249] New: Undefined reference within a header
Date: Fri, 07 Sep 2018 10:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87249
Bug ID: 87249
Summary: Undefined reference within a header
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eftaxi12 at otenet dot gr
Target Milestone: ---
Compiles fine with g++-7.3.
*.i file was not created (or not found).
Below is the command and its output:
$ g++ -v -save-temps -Wall -Wextra -Wl,-z,relro -Wl,--as-needed -g
-fsanitize=undefined -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -fstack-protector-strong -Wformat
-Werror=format-security -DNDEBUG -O3 -mmmx -mavx -DBAMG_LONG_LONG -DNCHECKPTR
-fPIC -Wl,-z,relro -Wl,--as-needed -rdynamic -o FreeFem++ sansrgraph.o
parallelempi-empty.o ffapi.o ../lglib/liblg.a ../fflib/libff.a -lumfpack -lamd
-lcholmod -lcolamd -larpack -llapack -lblas -ldl -lm -lrt
/usr/lib/gcc/x86_64-linux-gnu/8/libgfortran.so
/usr/lib/gcc/x86_64-linux-gnu/8/libquadmath.so
-L/usr/lib/x86_64-linux-gnu/hdf5/serial -lm -ldl -lz -lsz -lpthread -lhdf5
-lhdf5_hl
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-5'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-5)
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-g'
'-fsanitize=undefined' '-fno-strict-aliasing' '-fwrapv'
'-fno-aggressive-loop-optimizations' '-fstack-protector-strong' '-Wformat=1'
'-Werror=format-security' '-D' 'NDEBUG' '-O3' '-mmmx' '-mavx' '-D'
'BAMG_LONG_LONG' '-D' 'NCHECKPTR' '-fPIC' '-rdynamic' '-o' 'FreeFem++'
'-L/usr/lib/x86_64-linux-gnu/hdf5/serial' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/8/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/8/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
-plugin-opt=-fresolution=-lm.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu -export-dynamic
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -o FreeFem++
/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/8/crtbeginS.o
-L/usr/lib/x86_64-linux-gnu/hdf5/serial -L/usr/lib/gcc/x86_64-linux-gnu/8
-L/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/8/../../.. -z relro --as-needed -z relro
--as-needed sansrgraph.o parallelempi-empty.o ffapi.o ../lglib/liblg.a
../fflib/libff.a -lumfpack -lamd -lcholmod -lcolamd -larpack -llapack -lblas
-ldl -lrt /usr/lib/gcc/x86_64-linux-gnu/8/libgfortran.so
/usr/lib/gcc/x86_64-linux-gnu/8/libquadmath.so -lm -ldl -lz -lsz -lpthread
-lhdf5 -lhdf5_hl -lstdc++ -lm -lubsan -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr/lib/gcc/x86_64-linux-gnu/8/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/crtn.o
/usr/bin/ld: ../fflib/libff.a(lgfem.o): in function `TypeSolve<true,
Solve>::SolveInit::operator()(void*) const':
/home/eftaxiop/ΑÏχεία/Γενικά/Λογισμικό/freefem++/ΔημιουÏγία_πακÎτου_για_το_Debian_Linux/freefem++/src/fflib/problem.hpp:493:
undefined reference to `AnyTypeWithOutCheck Problem::eval<double,
Fem2D::GFESpace<Fem2D::Mesh3>, v_fes3>(void*,
Problem::Data<Fem2D::GFESpace<Fem2D::Mesh3> >*,
CountPointer<MatriceCreuse<double> >&,
MatriceCreuse<CadnaType<double>::Scalaire>*&) const'
/usr/bin/ld:
/home/eftaxiop/ΑÏχεία/Γενικά/Λογισμικό/freefem++/ΔημιουÏγία_πακÎτου_για_το_Debian_Linux/freefem++/src/fflib/problem.hpp:491:
undefined reference to `AnyTypeWithOutCheck Problem::eval<std::complex<double>,
Fem2D::GFESpace<Fem2D::Mesh3>, v_fes3>(void*,
Problem::Data<Fem2D::GFESpace<Fem2D::Mesh3> >*,
CountPointer<MatriceCreuse<std::complex<double> > >&,
MatriceCreuse<CadnaType<std::complex<double> >::Scalaire>*&) const'
/usr/bin/ld:
/home/eftaxiop/ΑÏχεία/Γενικά/Λογισμικό/freefem++/ΔημιουÏγία_πακÎτου_για_το_Debian_Linux/freefem++/src/fflib/problem.hpp:484:
undefined reference to `AnyTypeWithOutCheck Problem::eval<double,
Fem2D::FESpace, v_fes>(void*, Problem::Data<Fem2D::FESpace>*,
CountPointer<MatriceCreuse<double> >&,
MatriceCreuse<CadnaType<double>::Scalaire>*&) const'
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-614839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 10:11:32 2018
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From: "dennis at felsin9 dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87250] New: Internal compiler error with -Os -fsyntax-only
Date: Fri, 07 Sep 2018 10:11:00 -0000
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Bug ID: 87250
Summary: Internal compiler error with -Os -fsyntax-only
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dennis at felsin9 dot de
Target Milestone: ---
echo "#include <atomic>" | g++ -Os -fsyntax-only -x c++ -c -
In file included from <stdin>:1:
/usr/include/c++/8.2.1/atomic: In constructor ‘constexpr
std::__atomic_base<_IntTp>::__atomic_base(std::__atomic_base<_IntTp>::__int_type)
[with _ITp = bool; std::__atomic_base<_IntTp>::__int_type = bool]’:
/usr/include/c++/8.2.1/atomic:1370:1: internal compiler error: Segmentation
fault
} // namespace
^
Please submit a full bug report,
with preprocessed source if appropriate.
Workaround is to disable -Os when checking syntax only.
>From gcc-bugs-return-614840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 10:53:23 2018
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Subject: [Bug fortran/85507] [6/7/8/9 Regression] ICE in gfc_dep_resolver, at fortran/dependency.c:2258
Date: Fri, 07 Sep 2018 10:53:00 -0000
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vehre at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #22 from vehre at gcc dot gnu.org ---
Er, sorry, just forgot to close.
Didn't get any further reports therefore closing as fixed.
>From gcc-bugs-return-614841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 11:26:06 2018
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Subject: [Bug bootstrap/32497] Crosscomiling native sh3 gcc on a 64-bit host fails
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--- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Valeriy E. Ushakov from comment #8)
>
> It's been 11 (eleven!) years. As far as I know this patch (adjusted to
> catch up with the changes, but essentially the same) is still necessary for
> gcc 6.4 that is the compiler in NetBSD-current.
The patch contains changes to things outside the SH backend, so I can't approve
it. Can you please send the most recent version of the patch to the patches ML
so that other people can review it?
>From gcc-bugs-return-614842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 12:13:01 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
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--- Comment #17 from dave.anglin at bell dot net ---
The attached patch isn't a good fix but it does work around the problem.
>From gcc-bugs-return-614843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 13:08:39 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87249] Undefined reference within a header
Date: Fri, 07 Sep 2018 13:08:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-09-07
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Dimitris Eftaxiopoulos from comment #0)
> Compiles fine with g++-7.3.
>
> *.i file was not created (or not found).
We can't do anything without a test case. For C++ code you need to look for a
.ii file not .i
>From gcc-bugs-return-614844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 13:25:00 2018
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Subject: [Bug bootstrap/58828] Problem compiling gcc 4.8.2 using gcc 4.4.6
Date: Fri, 07 Sep 2018 13:24:00 -0000
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----------------------------------------------------------------------------
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Daniel Fruzynski from comment #5)
> (In reply to Eric Gallager from comment #4)
> > (In reply to Daniel Fruzynski from comment #3)
> > > OK, I found it. I used script symlink-tree (distributed with binutils) to
> > > create symlinks to binutils in gcc source dir. This script removed some gcc
> > > source files and replaced them with symlinks to corresponding files in
> > > binutils dir. I assumed that it will help me, but it created more problems.
> > >
> > > I am building gcc without binutils symlinked, and build is on stage 2 now.
> > > Look that it will complete successfully.
> > >
> > > I think that dedicated script to symlink all binutils into gcc dir would be
> > > useful. Could you create one?
> >
> > "You" as in Richard or Ian?
>
> I meant someone from gcc or binutils team who is responsible for this area.
>
> BTW, now gcc is shipped with contrib/download_prerequisites script which
> handles all this stuff, so you may close this issue if you want.
OK, cool.
>From gcc-bugs-return-614845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 13:31:37 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87251] New: warn about unnecessary USE statements
Date: Fri, 07 Sep 2018 13:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87251
Bug ID: 87251
Summary: warn about unnecessary USE statements
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: janus at gcc dot gnu.org
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It would be nice if gfortran had diagnostics to warn about unnecessary USE
statements, e.g. via a flag "-Wunused-module" or similar (analogous to the
flags that warn about unused variables, parameters or dummy arguments).
In small program, extraneous USE statements are usually easy to detect and
don't do much harm. In a large code base with many modules and dependencies, it
becomes increasingly harder to check all of them and get rid of unnecessary
ones.
One harmful effect of extra USE statements can be an increase of compile time
by additional module dependencies, or also by strongly increasing the number of
symbols that a compiler has to deal with in a given namespace (for large
modules with default public accessibility, such effects can quickly potentiate
in dependency chains).
Simple test case (where the dependency of 'b' on 'a' is for real, while the
dependency of 'c' on 'a' is bogus and can be removed):
module a
integer :: x,y,z
contains
subroutine sub()
end subroutine
end
module b
use a
contains
subroutine tub
call sub
end subroutine
end module
module c
use a
contains
subroutine cub
print *, "..."
end subroutine
end module
>From gcc-bugs-return-614846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 13:37:45 2018
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Subject: [Bug fortran/87251] warn about unnecessary USE statements
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----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=55179
--- Comment #1 from janus at gcc dot gnu.org ---
Somewhat related: PR 55179
>From gcc-bugs-return-614847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 13:54:12 2018
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Subject: [Bug bootstrap/32497] Crosscomiling native sh3 gcc on a 64-bit host fails
Date: Fri, 07 Sep 2018 13:54:00 -0000
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--- Comment #10 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Valeriy E. Ushakov from comment #8)
> I don't understand. The title mentions sh3, which is not obsolete.
>
Sorry, I misunderstood the sh numbering system when asking that last night (it
was late and I was tired)
>From gcc-bugs-return-614848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 14:05:49 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Fri, 07 Sep 2018 14:05:00 -0000
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----------------------------------------------------------------------------
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--- Comment #3 from janus at gcc dot gnu.org ---
Slightly reduced test case:
module defs
implicit none
type :: base
! this is ok
! private
contains
! This private clause acquires spurious scope
private
end type
type :: options
integer :: i
procedure(), pointer, nopass :: ptr
end type
end module
program p
use defs
implicit none
type(options) :: self
self%i = 0
self%ptr => null()
end
Two observations:
1) The problem only occurs if the PRIVATE statement comes after CONTAINS (not
before).
2) It only affects procedure pointer components, but not normal data
components.
>From gcc-bugs-return-614849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 14:13:27 2018
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Subject: [Bug c++/87152] internal compiler error: in tsubst_copy, at cp/pt.c:15484
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Sep 7 14:12:48 2018
New Revision: 264158
URL: https://gcc.gnu.org/viewcvs?rev=264158&root=gcc&view=rev
Log:
PR c++/87152 - range-based for loops with initializer broken in
templates.
* constexpr.c (potential_constant_expression_1) <case RANGE_FOR_STMT>:
Recur into RANGE_FOR_INIT_STMT.
* cp-tree.def: Add RANGE_FOR_INIT_STMT to RANGE_FOR_STMT.
* cp-tree.h (RANGE_FOR_INIT_STMT): Define.
* dump.c (cp_dump_tree) <case RANGE_FOR_STMT>: Also dump
RANGE_FOR_INIT_STMT.
* pt.c (tsubst_expr) <case RANGE_FOR_STMT>: Recur into
RANGE_FOR_INIT_STMT.
* semantics.c (begin_range_for_stmt): Adjust call to build_stmt.
Do put the init statement in RANGE_FOR_INIT_STMT.
(finish_range_for_decl): Pop it for templates.
* g++.dg/cpp2a/range-for11.C: New test.
* g++.dg/cpp2a/range-for12.C: New test.
* g++.dg/cpp2a/range-for13.C: New test.
* g++.dg/cpp2a/range-for14.C: New test.
* g++.dg/cpp2a/range-for15.C: New test.
* g++.dg/cpp2a/range-for16.C: New test.
* g++.dg/cpp2a/range-for17.C: New test.
* g++.dg/cpp2a/range-for18.C: New test.
* g++.dg/parse/error61.C (foo): Adjust dg-error.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/range-for11.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for12.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for13.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for14.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for15.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for16.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for17.C
trunk/gcc/testsuite/g++.dg/cpp2a/range-for18.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-tree.def
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/dump.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/parse/error61.C
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Subject: [Bug c++/87152] internal compiler error: in tsubst_copy, at cp/pt.c:15484
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----------------------------------------------------------------------------
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-614851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 14:38:23 2018
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It appears that the sentiment is that this testcase should actually be valid;
suspending until then.
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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--- Comment #9 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Marek Polacek from comment #8)
> It appears that the sentiment is that this testcase should actually be
> valid
Do you have a reference for that? The reason for this not to be valid,
presented at the bottom of
<http://lists.llvm.org/pipermail/cfe-dev/2018-August/059190.html> "Re:
[cfe-dev] return lvalue move instead of copy?" looks rather convincing to me.
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I suspended this in view of
<https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00428.html>.
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Valeriy E. Ushakov <uwe at netbsd dot org> changed:
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CC| |uwe at netbsd dot org
--- Comment #11 from Valeriy E. Ushakov <uwe at netbsd dot org> ---
Created attachment 44668
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44668&action=edit
Diff against gcc-6.4.0
This is essentially the same diff except gcc now provides its own
HOST_WIDE_INT_C() macro, so the patch uses that instead of defining its own.
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--- Comment #12 from Valeriy E. Ushakov <uwe at netbsd dot org> ---
I've attached updated patch against gcc 6.4.0. If I un-apply that patch to the
NetBSD tree with patch -R (i.e. revert the files to their original state as in
gcc 6.4.0) I get
$ nbmake-landisk insn-emit.o
# compile backend/insn-emit.o
/home/uwe/work/netbsd/build/tools/bin/shle--netbsdelf-c++ -Os -freorder-blocks
-Wall -Wpointer-arith -Wno-sign-compare -Wa,--fatal-warnings -Wno-uninitialized
-Wno-maybe-uninitialized -Werror -fPIE -Wno-narrowing -Wno-unused
-std=gnu++98 -Wno-stack-protector -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -I.
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/usr.bin/backend/../gcc/arch/sh3el
-DIN_GCC -DHAVE_CONFIG_H
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/.
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../include
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libcpp/include
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libdecnumber
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libdecnumber/dpd
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libbacktrace
-DTARGET_NAME=\"shle--netbsdelf\"
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/libgcc
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/usr.bin/backend/../../lib/libgcc/libgcov/arch/sh3el
--sysroot=/home/uwe/work/netbsd/build/distrib/landisk
-DLOCALEDIR=\"/usr/share/locale\" -DNETBSD_NATIVE -I. -DENABLE_SHARED_LIBGCC
-c insn-emit.c -o insn-emit.o
insn-emit.c:6346:3: error: this decimal constant is unsigned only in ISO C90
[-Werror]
return gen_rtx_SET (operand0,
^~~~~~
cc1plus: all warnings being treated as errors
[...]
$ cat -n insn-emit.c | sed -n '6341,6354p'
6341 rtx
6342 gen_mshflo_l_di (rtx operand0 ATTRIBUTE_UNUSED,
6343 rtx operand1 ATTRIBUTE_UNUSED,
6344 rtx operand2 ATTRIBUTE_UNUSED)
6345 {
6346 return gen_rtx_SET (operand0,
6347 gen_rtx_IOR (DImode,
6348 gen_rtx_AND (DImode,
6349 operand1,
6350 GEN_INT (4294967295L)),
6351 gen_rtx_ASHIFT (DImode,
6352 operand2,
6353 const_int_rtx[MAX_SAVED_CONST_INT + (32)])));
6354 }
and
$ nbmake-landisk insn-recog.o
# compile backend/insn-recog.o
/home/uwe/work/netbsd/build/tools/bin/shle--netbsdelf-c++ -Os -freorder-blocks
-Wall -Wpointer-arith -Wno-sign-compare -Wa,--fatal-warnings -Wno-uninitialized
-Wno-maybe-uninitialized -Werror -fPIE -Wno-narrowing -Wno-unused
-std=gnu++98 -Wno-stack-protector -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -I.
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/usr.bin/backend/../gcc/arch/sh3el
-DIN_GCC -DHAVE_CONFIG_H
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/.
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../include
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libcpp/include
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libdecnumber
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libdecnumber/dpd
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/../libbacktrace
-DTARGET_NAME=\"shle--netbsdelf\"
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/libgcc
-I/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/usr.bin/backend/../../lib/libgcc/libgcov/arch/sh3el
--sysroot=/home/uwe/work/netbsd/build/distrib/landisk
-DLOCALEDIR=\"/usr/share/locale\" -DNETBSD_NATIVE -I. -DENABLE_SHARED_LIBGCC
-c insn-recog.c -o insn-recog.o
insn-recog.c:1532:7: error: this decimal constant is unsigned only in ISO C90
[-Werror]
|| XWINT (x4, 0) != -2147483648L
^~
insn-recog.c:5762:5: error: this decimal constant is unsigned only in ISO C90
[-Werror]
case -2147483648L:
^~~~
/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/config/sh/sh.md:15774:15:
error: this decimal constant is unsigned only in ISO C90 [-Werror]
DONE;
^
/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/config/sh/sh.md:4832:17:
error: this decimal constant is unsigned only in ISO C90 [-Werror]
(and:SI (match_dup 1) (const_int 1))))
^~~~
/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/config/sh/sh.md:16430:17:
error: this decimal constant is unsigned only in ISO C90 [-Werror]
(define_split
^
/home/uwe/work/netbsd/ro/src/external/gpl3/gcc.old/dist/gcc/config/sh/sh.md:14012:15:
error: this decimal constant is unsigned only in ISO C90 [-Werror]
[(set (match_operand:DF 0 "fp_arith_reg_operand" "=f")
^~
cc1plus: all warnings being treated as errors
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Subject: [Bug bootstrap/32497] Crosscomiling native sh3 gcc on a 64-bit host fails
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--- Comment #13 from Valeriy E. Ushakov <uwe at netbsd dot org> ---
The above build was done on a linux/amd64 host.
The error happens when NetBSD build cross-compiles native NetBSD/sh3 gcc, i.e.
the compiler that will run natively on sh3 as part of the NetBSD distribution.
I'm sorry, but I don't have time or energy to come up with a standalone
reproducer, especially given prior history of this bug report being ignored for
over a decade. Someone familiar with gcc code base should be able to do that
easily I think. And as I said in comment #5, you can reproduce it with the
NetBSD source tree with a single command on about any modern unix on a 64-bit
host.
I guess linux-sh folks have never run into this because they use cross-compiler
exclusively and never compile stuff on sh3 itself, so they never build native
gcc for sh3.
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--- Comment #14 from Valeriy E. Ushakov <uwe at netbsd dot org> ---
Sorry, I meant comment #6 in the above.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Component|libfortran |middle-end
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think there are two issues here, one is the glibc also puts the result in the
wrong quadrant. The other issue is the GCC's constant folding does too. What
is interesting is they both put in the same quadrant though.
I cannot comment if this is a bug because I don't have a copy of the IEEE spec
and/or C11 spec too.
>From gcc-bugs-return-614859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 17:16:40 2018
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Subject: [Bug rtl-optimization/87238] Redundant Restore of $x0 when memcpy always returns the first argument.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-07
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
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Subject: [Bug fortran/86116] [6/7/8/9 Regression] Ambiguous generic interface not recognised
Date: Fri, 07 Sep 2018 17:33:00 -0000
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--- Comment #6 from janus at gcc dot gnu.org ---
Author: janus
Date: Fri Sep 7 17:33:15 2018
New Revision: 264161
URL: https://gcc.gnu.org/viewcvs?rev=264161&root=gcc&view=rev
Log:
2018-09-07 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* interface.c (compare_type): Remove a CLASS/TYPE check.
(compare_type_characteristics): New function that behaves like the old
'compare_type'.
(gfc_check_dummy_characteristics, gfc_check_result_characteristics):
Call 'compare_type_characteristics' instead of 'compare_type'.
2018-09-07 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* gfortran.dg/generic_34.f90: New test case.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/generic_34.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/interface.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c/87248] Bad code for masked operations involving signed ints
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-07
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
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>From gcc-bugs-return-614862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 17:47:47 2018
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Subject: [Bug c/87248] Bad code for masked operations involving signed ints
Date: Fri, 07 Sep 2018 17:47:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
/* A & N ? N : 0 is simply A & N if N is a power of two. This
is probably obsolete because the first operand should be a
truth value (that's why we have the two cases above), but let's
leave it in until we can confirm this for all front-ends. */
if (integer_zerop (op2)
&& TREE_CODE (arg0) == NE_EXPR
&& integer_zerop (TREE_OPERAND (arg0, 1))
&& integer_pow2p (arg1)
&& TREE_CODE (TREE_OPERAND (arg0, 0)) == BIT_AND_EXPR
&& operand_equal_p (TREE_OPERAND (TREE_OPERAND (arg0, 0), 1),
arg1, OEP_ONLY_CONST))
return pedantic_non_lvalue_loc (loc,
fold_convert_loc (loc, type,
TREE_OPERAND (arg0, 0)));
is the problem, while arg1 (8-bit) is integer_pow2p, TREE_OPERAND (TREE_OPERAND
(arg0, 0), 1)) is equal to it (-128), but is not a pow2p.
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Subject: [Bug middle-end/87248] [6/7/8/9 Regression] Bad code for masked operations involving signed ints
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Component|c |middle-end
Target Milestone|--- |6.5
Summary|Bad code for masked |[6/7/8/9 Regression] Bad
|operations involving signed |code for masked operations
|ints |involving signed ints
>From gcc-bugs-return-614864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 18:01:59 2018
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Subject: [Bug fortran/86116] [6/7/8/9 Regression] Ambiguous generic interface not recognised
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--- Comment #7 from janus at gcc dot gnu.org ---
Author: janus
Date: Fri Sep 7 18:01:23 2018
New Revision: 264162
URL: https://gcc.gnu.org/viewcvs?rev=264162&root=gcc&view=rev
Log:
2018-09-07 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* interface.c (compare_type): Remove a CLASS/TYPE check.
(compare_type_characteristics): New function that behaves like the old
'compare_type'.
(gfc_check_dummy_characteristics, gfc_check_result_characteristics):
Call 'compare_type_characteristics' instead of 'compare_type'.
2018-09-07 Janus Weil <janus@gcc.gnu.org>
Backported from trunk
PR fortran/86116
* gfortran.dg/generic_34.f90: New test case.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/generic_34.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/interface.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86116] [6/7/8/9 Regression] Ambiguous generic interface not recognised
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from janus at gcc dot gnu.org ---
Fixed on 9-trunk and the release branches. The fix will be included in the
upcoming releases 6.5, 7.4, 8.3 and 9.0. Closing.
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Subject: [Bug middle-end/87247] intrinsic acosh violates 2008 Standard rule 13.7.5 line 5
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--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to Andrew Pinski from comment #1)
> I think there are two issues here, one is the glibc also puts the result in
> the wrong quadrant. The other issue is the GCC's constant folding does too.
> What is interesting is they both put in the same quadrant though.
>
> I cannot comment if this is a bug because I don't have a copy of the IEEE
> spec and/or C11 spec too.
It's a bug in the Fortran Standard. OP should send an interpretation
request to J3. n1256.pdf has
7.3.6 Hyperbolic functions
7.3.6.1 The cacosh functions
The cacosh functions compute the complex arc hyperbolic cosine
of z, with a branch cut at values less than 1 along the real axis.
The cacosh functions return the complex arc hyperbolic cosine value,
in the range of a half-strip of non-negative values along the real
axis and in the interval [-i pi, +i pi] along the imaginary axis.
>From gcc-bugs-return-614867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 18:28:57 2018
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Subject: [Bug c++/71446] Incorrect overload resolution when using designated initializers
Date: Fri, 07 Sep 2018 18:28:00 -0000
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Harald van Dijk <harald at gigawatt dot nl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |harald at gigawatt dot nl
--- Comment #2 from Harald van Dijk <harald at gigawatt dot nl> ---
Another test case, reduced from Chromium 70.0.3538.9 and accepted by clang:
struct S { void *a; int b; };
void f(S);
void g() { f({.b = 1}); }
This fails with
bug.cc: In function ‘void g()’:
bug.cc:3:24: error: could not convert ‘{1}’ from ‘<brace-enclosed initializer
list>’ to ‘S’
void g() { f({.b = 1}); }
^
The error suggests the field names are simply ignored entirely during overload
resolution, which also explains the behaviour of the originally reported code.
>From gcc-bugs-return-614868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 18:33:03 2018
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Subject: [Bug middle-end/58670] asm goto miscompilation
Date: Fri, 07 Sep 2018 18:33:00 -0000
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Nick Desaulniers <ndesaulniers at google dot com> changed:
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----------------------------------------------------------------------------
CC| |ndesaulniers at google dot com
--- Comment #10 from Nick Desaulniers <ndesaulniers at google dot com> ---
Specifically, it seems this was fixed in the gcc-4.8.2 timeframe. This shows
no issue in gcc-4.8.2, but the issue from comment #5 in gcc-4.8.1. It seems
the Linux kernel works around this with a macro called `asm_volatile_goto` that
simply inserts an empty asm block `asm("");` after an `asm goto`, which even in
this reproducer fixes the problem.
https://godbolt.org/z/ZUDRnU
>From gcc-bugs-return-614869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 19:01:13 2018
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Subject: [Bug fortran/53796] I/O INQUIRE of RECL: If not specified in OPEN, the default value should be returned (sequential access)
Date: Fri, 07 Sep 2018 19:01:00 -0000
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--- Comment #22 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Fri Sep 7 18:59:50 2018
New Revision: 264163
URL: https://gcc.gnu.org/viewcvs?rev=264163&root=gcc&view=rev
Log:
Remove unused init_unsigned_integer function.
As pointed out by Bernhard Reutner-Fischer, this function is unused
since the fix for PR 53796 in November 2017.
2018-09-07 Janne Blomqvist <jb@gcc.gnu.org>
* runtime/environ.c (init_unsigned_integer): Remove.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/runtime/environ.c
>From gcc-bugs-return-614870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 19:14:46 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Fri, 07 Sep 2018 19:14:00 -0000
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--- Comment #18 from dave.anglin at bell dot net ---
On 2018-09-07 8:12 AM, dave.anglin at bell dot net wrote:
> The attached patch isn't a good fix but it does work around the problem.
This fix is better. The checks in expr.c and fold-const.c were not
checking for methods.
Testing.
>From gcc-bugs-return-614871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 19:18:07 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Fri, 07 Sep 2018 19:18:00 -0000
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--- Comment #19 from dave.anglin at bell dot net ---
On 2018-09-07 3:14 PM, dave.anglin at bell dot net wrote:
> This fix is better.
Oops, wrong patch.
>From gcc-bugs-return-614872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 22:09:29 2018
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Subject: [Bug middle-end/87247] intrinsic acosh violates 2008 Standard rule 13.7.5 line 5
Date: Fri, 07 Sep 2018 22:09:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I think there are two issues here, one is the glibc also puts the result in
> > the wrong quadrant. The other issue is the GCC's constant folding does too.
> > What is interesting is they both put in the same quadrant though.
> >
> > I cannot comment if this is a bug because I don't have a copy of the IEEE
> > spec and/or C11 spec too.
>
> It's a bug in the Fortran Standard. OP should send an interpretation
> request to J3. n1256.pdf has
>
> 7.3.6 Hyperbolic functions
>
> 7.3.6.1 The cacosh functions
>
> The cacosh functions compute the complex arc hyperbolic cosine
> of z, with a branch cut at values less than 1 along the real axis.
>
> The cacosh functions return the complex arc hyperbolic cosine value,
> in the range of a half-strip of non-negative values along the real
> axis and in the interval [-i pi, +i pi] along the imaginary axis.
Checking FreeBSD libm sources, which differ from glibc, one finds
the comment
/*
* cacosh(z) = I*cacos(z) or -I*cacos(z)
* where the sign is chosen so Re(cacosh(z)) >= 0.
*/
which means libm chooses the Riemann sheet with the
REAL part always positive. Fortran must be using a
convention for choosing a different Riemann sheet
such that AIMAG part is always positive.
>From gcc-bugs-return-614873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 22:22:06 2018
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Subject: [Bug middle-end/87247] intrinsic acosh violates 2008 Standard rule 13.7.5 line 5
Date: Fri, 07 Sep 2018 22:22:00 -0000
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--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The standard branch cut for acosh (not just a C standard, but as at
https://dlmf.nist.gov/4.37 for example) follows from the principles that
(a) acosh(conj(x)) = conj(acosh(x)) and (b) complex acosh should take the
same value as real acosh for those real arguments for which acosh has a
real value. Fixing the sign of the imaginary part of the result is
inconsistent with (a) (which is a general principle for complex libm
functions, not just acosh).
>From gcc-bugs-return-614874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 22:57:30 2018
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Subject: [Bug bootstrap/87252] New: gcc-4.4 cross-builds broken, apparently in self-tests
Date: Fri, 07 Sep 2018 22:57:00 -0000
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Bug ID: 87252
Summary: gcc-4.4 cross-builds broken, apparently in self-tests
Product: gcc
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(Note: no cross-binutils or anything needed, just gcc sources and a native
gcc-4.4. This is an *old* installation which identifies itself as "gcc version
4.4.4 20100630 (Red Hat 4.4.4-10) (GCC)".)
Building sources from e.g. r264161, configured for a cross-build, for example
(to wit, parameters and target not important) with the parameters
"--target=arm-eabi --enable-languages=c" yields a broken build with an internal
error as follows (right after manpage builds):
------------------------------------------------
/tmp/gcc44break/a/./gcc/xgcc -B/tmp/gcc44break/a/./gcc/ -xc -nostdinc /dev/null
-S -o /dev/null -fself-test=/tmp/gcc44break/gcc/gcc/testsuite/selftests
pure virtual method called
terminate called without an active exception
cc1: internal compiler error: Aborted
0xbad3b5 crash_signal
/tmp/gcc44break/gcc/gcc/toplev.c:325
0x14f1f0e print_any_labels
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:1491
0x14f1f0e print_line
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:2259
0x14f1f0e diagnostic_show_locus(diagnostic_context*, rich_location*,
diagnostic_t)
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:2342
0x14f5d82 test_one_liner_labels
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:2818
0x14f6b9f test_diagnostic_show_locus_one_liner
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:2865
0x15037e7 selftest::for_each_line_table_case(void (*)(selftest::line_table_case
const&))
/tmp/gcc44break/gcc/gcc/input.c:3525
0x14f29f7 selftest::diagnostic_show_locus_c_tests()
/tmp/gcc44break/gcc/gcc/diagnostic-show-locus.c:3758
0x147f2f4 selftest::run_tests()
/tmp/gcc44break/gcc/gcc/selftest-run-tests.c:88
0xbadad2 toplev::run_self_tests()
/tmp/gcc44break/gcc/gcc/toplev.c:2234
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[2]: *** [s-selftest-c] Error 1
rm cpp.pod fsf-funding.pod gcov.pod gfdl.pod gpl.pod gcc.pod gcov-dump.pod
gcov-tool.pod
make[2]: Leaving directory `/tmp/gcc44break/a/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/tmp/gcc44break/a'
make: *** [all] Error 2
------------------------------------------------
Just to be clear, this does not happen for a native build (bootstrap) with the
same gcc. Also, gcc-4.9 works fine.
>From gcc-bugs-return-614875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 23:24:02 2018
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Subject: [Bug middle-end/87248] [6/7/8/9 Regression] Bad code for masked operations involving signed ints
Date: Fri, 07 Sep 2018 23:24:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44671
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44671&action=edit
gcc9-pr87248.patch
Untested fix.
>From gcc-bugs-return-614876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 23:45:01 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
Date: Fri, 07 Sep 2018 23:45:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01891.html
>From gcc-bugs-return-614877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 23:46:19 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Should have been fixed via
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01996.html .
>From gcc-bugs-return-614878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 07 23:49:36 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
Date: Fri, 07 Sep 2018 23:49:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Maybe related to PR 87134. There might be more of these issues floating in GCC
code where GCC 4.4 does not implement the C++11 sematics of initializing.
>From gcc-bugs-return-614879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 00:36:17 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
Date: Sat, 08 Sep 2018 00:36:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Looks like it's crashing on a virtual function call, within the code I added in
r263564.
It says "pure virtual method called", but it's calling it on an instance of
text_range_label (on the stack), which is a concrete class, with an
implementation of "get_text" - albeit one defined in gcc-rich-location.h. Is
there something about this that was problematic with older g++ versions?
>From gcc-bugs-return-614880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 00:59:19 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Possibly due to lifetime issues: perhaps the on-stack text_range_label's dtor
is being called (and thus trashing updating the vtable ptr) before the object
gets used.
(see e.g.
https://tombarta.wordpress.com/2008/07/10/gcc-pure-virtual-method-called/ and
https://www.artima.com/cppsource/pure_virtual.html )
>From gcc-bugs-return-614881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 01:04:00 2018
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Subject: [Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests
Date: Sat, 08 Sep 2018 01:04:00 -0000
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
...though my understanding is that an automatic local's storage is deallocated
at the end of the enclosing code block - presumably that's when the dtor is
meant to run, and not before.
>From gcc-bugs-return-614882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 02:47:14 2018
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Subject: [Bug c++/67928] Ambiguous call not diagnosed
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-614883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 02:50:33 2018
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Subject: [Bug c++/53215] Warn if orphaned memory is created by ignoring return value of new
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Not that I really know C++ that well, but maybe the builtin operator new could
simply be marked with __attribute__((warn_unused_result)) or whatever the C++
equivalent is? I dunno...
>From gcc-bugs-return-614884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 02:55:36 2018
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Subject: [Bug other/19180] Improve documentation on How to Add New GCC option
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #4)
> From bug 26168:
>
> Also, the comment at the top of the automatically-generated options.c file
> says it's generated by "opts.sh" rather than by those awk scripts.
This part is fixed at least.
>From gcc-bugs-return-614885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 03:11:05 2018
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Subject: [Bug libstdc++/78851] Resolve DR 550 in cmath and continue using __builtin_powil() even in C++11
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |egallager at gcc dot gnu.org
--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
This came up on the gcc-help mailing list here:
https://gcc.gnu.org/ml/gcc-help/2018-09/msg00034.html
>From gcc-bugs-return-614886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 07:25:22 2018
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
Date: Sat, 08 Sep 2018 07:25:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from janus at gcc dot gnu.org ---
This draft patch fixes the problem:
diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
index c5bf822cd24..43a37018575 100644
--- a/gcc/fortran/expr.c
+++ b/gcc/fortran/expr.c
@@ -5390,7 +5390,7 @@ gfc_is_simply_contiguous (gfc_expr *expr, bool strict,
bool permit_element)
gfc_ref *r, *rc;
s = expr->symtree->n.sym;
- if (s->ts.type != BT_CLASS)
+ if (s->ts.type != BT_CLASS && s->ts.type != BT_DERIVED)
return false;
rc = NULL;
>From gcc-bugs-return-614887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 07:35:54 2018
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
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----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83012
--- Comment #3 from janus at gcc dot gnu.org ---
It seems the regressions was introduced by r254914, see PR 83012.
>From gcc-bugs-return-614888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 07:51:57 2018
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Subject: [Bug fortran/87239] ICE in deferred-length string
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of/ related to pr77325 and pr84109.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] [F03] Deferred-length character
>From gcc-bugs-return-614889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 07:53:37 2018
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Subject: [Bug fortran/84109] ICE in adjustl on allocatable array of strings
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of/ related to pr77325 and pr87239.
>From gcc-bugs-return-614890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 07:54:45 2018
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Subject: [Bug fortran/77325] ICE in gimplify_var_or_parm_decl, at gimplify.c:1933
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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Blocks| |68241
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of/ related to pr84109 and pr87239.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] [F03] Deferred-length character
>From gcc-bugs-return-614891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 08:17:34 2018
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
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--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to janus from comment #2)
> This draft patch fixes the problem:
... and regtests cleanly.
>From gcc-bugs-return-614892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 08:49:18 2018
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Subject: [Bug debug/86549] [8/9 Regression] -flto -g0 vs. -g issues
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch in comment 0 fixes
FAIL: g++.dg/asan/pr62017.C -O2 -flto (internal compiler error)
FAIL: g++.dg/asan/pr62017.C -O2 -flto (test for excess errors)
FAIL: g++.dg/asan/pr62017.C -O2 -flto -flto-partition=none (internal
compiler error)
FAIL: g++.dg/asan/pr62017.C -O2 -flto -flto-partition=none (test for excess
errors)
FAIL: g++.dg/asan/pr78651.C -O2 -flto (internal compiler error)
FAIL: g++.dg/asan/pr78651.C -O2 -flto (test for excess errors)
FAIL: g++.dg/asan/pr78651.C -O2 -flto -flto-partition=none (internal
compiler error)
FAIL: g++.dg/asan/pr78651.C -O2 -flto -flto-partition=none (test for excess
errors)
FAIL: g++.dg/asan/pr81021.C -O2 -flto (internal compiler error)
FAIL: g++.dg/asan/pr81021.C -O2 -flto (test for excess errors)
FAIL: g++.dg/asan/pr81021.C -O2 -flto -flto-partition=none (internal
compiler error)
FAIL: g++.dg/asan/pr81021.C -O2 -flto -flto-partition=none (test for excess
errors)
but not pr87187.
>From gcc-bugs-return-614893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 08:51:22 2018
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Subject: [Bug lto/87187] FAIL: gfortran.dg/short_circuiting_3.f90 -g -flto (internal compiler error) on darwin
Date: Sat, 08 Sep 2018 08:50:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR is not fixed by the patch in pr86549 comment0.
>From gcc-bugs-return-614894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 11:39:36 2018
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Sat, 08 Sep 2018 11:39:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |janus at gcc dot gnu.org
--- Comment #4 from janus at gcc dot gnu.org ---
The problem can be fixed with this patch:
diff --git a/gcc/fortran/parse.c b/gcc/fortran/parse.c
index 13cc6f5fccd..5f0d181d728 100644
--- a/gcc/fortran/parse.c
+++ b/gcc/fortran/parse.c
@@ -3267,6 +3267,7 @@ parse_derived (void)
push_state (&s, COMP_DERIVED, gfc_new_block);
gfc_new_block->component_access = ACCESS_PUBLIC;
+ gfc_typebound_default_access = ACCESS_PUBLIC;
seen_private = 0;
seen_sequence = 0;
seen_component = 0;
I'm not sure if this is the best way to fix it, though.
>From gcc-bugs-return-614895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 11:59:22 2018
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Sat, 08 Sep 2018 11:59:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
The following patch also fixes the problem:
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index 03298833c98..83fc6c29b5a 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -6754,7 +6754,7 @@ match_ppc_decl (void)
gfc_clear_attr (¤t_attr);
current_attr.procedure = 1;
current_attr.proc_pointer = 1;
- current_attr.access = tb->access;
+ current_attr.access = gfc_current_block()->component_access;
current_attr.flavor = FL_PROCEDURE;
/* Match the colons (required). */
I think this approach is better than the one in comment 4.
There are two kinds of default access: One for components, one for type-bound
procedures. For procedure-pointer components, gfortran currently applies the
TBP default access. I think this is wrong (since PPCs are declared in the
component part, not in the TBP part of a type declaration). The above patch
fixes it.
>From gcc-bugs-return-614897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 12:29:49 2018
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Subject: [Bug target/87253] New: Python test_ctypes fails when built with gcc 8.2
Date: Sat, 08 Sep 2018 12:29:00 -0000
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Bug ID: 87253
Summary: Python test_ctypes fails when built with gcc 8.2
Product: gcc
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Python-2.7.15
Steps to reproduce error
In Python src directory:
./configure
make
./python Lib/test/regrtest.py -v test_ctypes
======================================================================
FAIL: test_struct_by_value (ctypes.test.test_win32.Structures)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/kugan.vivekanandarajah/Python-2.7.15/Lib/ctypes/test/test_win32.py",
line 113, in test_struct_by_value
self.assertEqual(ret.left, left.value)
AssertionError: -200 != 10
gdb ./python
b ReturnRect
r Lib/test/regrtest.py -v test_ctypesQuit
(gdb) p cp
$9 = {x = 15, y = 25}
(gdb) p fp
$10 = {x = 548534164448, y = 9890688}
cp and fp are the same as can be seen from below:
vi /home/kugan.vivekanandarajah/Python-2.7.15/Lib/ctypes/test/test_win32.py
+112
pt = POINT(15, 25)
...
ReturnRect = dll.ReturnRect
ReturnRect.argtypes = [c_int, RECT, POINTER(RECT), POINT, RECT,
POINTER(RECT), POINT, RECT]
....
ret = ReturnRect(i, rect, pointer(rect), pt, rect,
byref(rect), pt, rect)
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/kugan.vivekanandarajah/install/usr/local/bin/../libexec/gcc/aarch64-unknown-linux-gnu/8.2.1/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: ../gcc/configure --disable-bootstrap
Thread model: posix
gcc version 8.2.1 20180907 (GCC)
>From gcc-bugs-return-614896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 12:29:09 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Sat, 08 Sep 2018 12:29:00 -0000
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--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Stephan Bergmann from comment #9)
> (In reply to Marek Polacek from comment #8)
> > It appears that the sentiment is that this testcase should actually be
> > valid
>
> Do you have a reference for that? The reason for this not to be valid,
> presented at the bottom of
> <http://lists.llvm.org/pipermail/cfe-dev/2018-August/059190.html> "Re:
> [cfe-dev] return lvalue move instead of copy?" looks rather convincing to me.
(Namely, slicing by move leaving the object in a partially-moved state that
might not maintain invariants.)
That's a good point. I guess the rule we're looking for will still require
that the returned object being treated as an xvalue be bound to some rvalue
reference to the whole object, rather than a base subobject.
So Marek, please go ahead and apply your patch after all. And similarly, maybe
refine your 87109 patch to only reject the conversion function if it comes from
a base class.
>From gcc-bugs-return-614898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 12:42:16 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Sat, 08 Sep 2018 12:42:00 -0000
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--- Comment #6 from janus at gcc dot gnu.org ---
I have verified that the patch in comment 5 shows no failures in the testsuite.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87254] New: Inlining clones in trivial wrappers
Date: Sat, 08 Sep 2018 12:43:00 -0000
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Bug ID: 87254
Summary: Inlining clones in trivial wrappers
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: ipa
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CC: marxin at gcc dot gnu.org
Target Milestone: ---
int h();
static int f(int j,double*a){
if(j)
{
double t[1024];
for(int i=0;i<1024;++i){t[i]=i;}
return t[(int)*a];
}
else
return h();
}
int g(double*a){return f(0,a);}
Compiled with -O3.
The code in f is random crap, the key elements to reproduce are:
- f is not inlined in einline,
- f is cloned in IPA-CP,
- the clone of f is not inlined in g.
(so a simpler reproducer may be possible with -fdisable-tree-einline --param
ipa-cp-eval-threshold=10)
The first 2 steps are normal, but the last one seems wrong to me. There is
nothing to lose by inlining f's clone into the trivial wrapper that is its only
caller. The inline dump complains that "--param large-stack-frame-growth limit
reached", but changing this param has no effect, I have to change
"large-stack-frame" instead to convince it to inline.
Just in case, before that I was investigating
static int f(int j,double*a){
if(j)
{
double t[1024];
for(int i=0;i<1024;++i){t[i]=i;}
return t[(int)*a];
}
else
{
float t[1024];
for(int i=0;i<1024;++i){t[i]=i;}
return t[(int)*a];
}
}
int g(double*a){return f(0,a);}
int h(double*a){return f(1,a);}
with -O3 -fdisable-tree-einline --param ipa-cp-eval-threshold=10 .
In the past, I have seen such trivial left-over wrappers with -flto on GMP (
https://gmplib.org/list-archives/gmp-devel/2018-April/004874.html ), and I was
reminded of it by https://stackoverflow.com/q/51152215/1918193 .
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/85458] FAIL: gcc.dg/pr83480.c (internal compiler error)
Date: Sat, 08 Sep 2018 13:20:00 -0000
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--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Sep 8 13:20:23 2018
New Revision: 264168
URL: https://gcc.gnu.org/viewcvs?rev=264168&root=gcc&view=rev
Log:
PR rtl-optimization/85458
* sel-sched.c (sel_target_adjust_priority): Allow backend adjust
priority hook to reduce the priority of EXPR.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/sel-sched.c
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86678] constexpr evaluation incorrectly diagnoses unevaluated call to non-constexpr function
Date: Sat, 08 Sep 2018 13:21:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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Subject: [Bug rtl-optimization/85458] FAIL: gcc.dg/pr83480.c (internal compiler error)
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John David Anglin <danglin at gcc dot gnu.org> changed:
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug middle-end/63510] Wrong line number in Wstrict-overflow message
Date: Sat, 08 Sep 2018 13:47:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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--- Comment #14 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Not reproducible on gcc (GCC) 9.0.0 20180903 (experimental)
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/87000] LBOUND and UBOUND give unexpected result for arrays without 1-based indices if in subprogram
Date: Sat, 08 Sep 2018 14:59:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Related discussion at
https://groups.google.com/forum/#!topic/comp.lang.fortran/YoQPFwla7L0.
For the test in comment 2, gfortran gives
lbound = -5
ubound = 10
lbound = 1
ubound = 16
since gcc6. I think it is the expected result. Closing as INVALID.
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Subject: [Bug fortran/87103] [OOP] ICE in gfc_new_symbol() due to overlong symbol name
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Patch at https://gcc.gnu.org/ml/fortran/2018-09/msg00044.html.
>From gcc-bugs-return-614906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 15:16:00 2018
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Sat, 08 Sep 2018 15:15:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #11)
> (In reply to Stephan Bergmann from comment #9)
> > (In reply to Marek Polacek from comment #8)
> > > It appears that the sentiment is that this testcase should actually be
> > > valid
> >
> > Do you have a reference for that? The reason for this not to be valid,
> > presented at the bottom of
> > <http://lists.llvm.org/pipermail/cfe-dev/2018-August/059190.html> "Re:
> > [cfe-dev] return lvalue move instead of copy?" looks rather convincing to me.
>
> (Namely, slicing by move leaving the object in a partially-moved state that
> might not maintain invariants.)
>
> That's a good point. I guess the rule we're looking for will still require
> that the returned object being treated as an xvalue be bound to some rvalue
> reference to the whole object, rather than a base subobject.
>
> So Marek, please go ahead and apply your patch after all.
Will do.
> And similarly,
> maybe refine your 87109 patch to only reject the conversion function if it
> comes from a base class.
I'll send a patch to the ML, I don't feel like committing that without a
review.
>From gcc-bugs-return-614907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 15:34:04 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/53215] Warn if orphaned memory is created by ignoring return value of new
Date: Sat, 08 Sep 2018 15:34:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The result of the builtin operator new isn't unused in a new expression.
operator new() is called by the compiler to allocate memory, then it constructs
objects in that memory. So the actual allocation result isn't unused. The
pointer returned by the new expression is unused, but that's not always a bug.
This code is fine and doesn't leak:
struct X {
X();
};
X* global;
X::X() { global = this; }
int main() {
new X;
delete global;
}
We could probably teach the compiler to warn about unused results of anything
with attribute__((malloc)), which would cover raw calls to the operator new()
function (but nobody calls that by mistake and forgets to use the result, so I
doubt it will catch any bugs).
More useful might be to warn about any new expression where no non-trivial
initialization happens. That would not warn about the example above (because X
has a non-trivial default constructor) but would warn about the example in
comment 0, and cases for classes with trivial default constructors.
I'm still not convinced this is a real problem that needs to be solved, but if
adding a warning isn't too hard maybe it's worth doing.
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Subject: [Bug c++/86678] constexpr evaluation incorrectly diagnoses unevaluated call to non-constexpr function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86678
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Sep 8 16:00:02 2018
New Revision: 264171
URL: https://gcc.gnu.org/viewcvs?rev=264171&root=gcc&view=rev
Log:
PR c++/86678 - constexpr function with non-constant after return.
In this testcase, the call to f() can never be a constant
expression, but that's not a problem because it isn't always
reached by calls to g. We were wrongly rejecting this because
potential_constant_expression_1 lacked the jump tracking that
cxx_eval_constant_expression has. So this patch adds a simpler
version of that tracking.
* constexpr.c (potential_constant_expression_1): Add jump_target.
(breaks): Check for BREAK_STMT.
(continues): Check for CONTINUE_STMT.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-return4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug c++/86678] constexpr evaluation incorrectly diagnoses unevaluated call to non-constexpr function
Date: Sat, 08 Sep 2018 16:26:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 9.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87150] [8/9 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Sat, 08 Sep 2018 17:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87150
--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Sat Sep 8 17:36:08 2018
New Revision: 264172
URL: https://gcc.gnu.org/viewcvs?rev=264172&root=gcc&view=rev
Log:
PR c++/87150 - wrong ctor with maybe-rvalue semantics.
* call.c (struct conversion): Update commentary.
(standard_conversion): Set rvaluedness_matches_p if
LOOKUP_PREFER_RVALUE
for ck_base.
* g++.dg/cpp0x/move-return2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/move-return2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87150] [8 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Sat, 08 Sep 2018 17:37:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Summary|[8/9 Regression] move ctor |[8 Regression] move ctor
|wrongly chosen in return |wrongly chosen in return
|stmt (derived vs. base) |stmt (derived vs. base)
--- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed. (I don't think this should be backported to 8.)
>From gcc-bugs-return-614912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 17:59:11 2018
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From: "ben at rockshrub dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87255] New: Different semantics of OpenMP combined construct and nested constructs
Date: Sat, 08 Sep 2018 17:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87255
Bug ID: 87255
Summary: Different semantics of OpenMP combined construct and
nested constructs
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Priority: P3
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This was reported on the OpenMP Forum as a difference between gfortran and the
Intel Fortran compiler here
http://forum.openmp.org/forum/viewtopic.php?f=3&t=2055
However, I think gfortran incorrectly compiles the OpenMP combined "parallel
do" construct, evaluating the loop bounds outside of the parallel context. An
OpenMP "do" construct directly nested inside an OpenMP "parallel" construct
seems to evaluate the loop bounds inside the parallel context as one would
expect. The OpenMP API 4.5 states in section 2.11 that the two (combined
construct and nested constructs) should have identical semantics.
GCC version, configure/build options, system type:
$ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/8.2.0/libexec/gcc/x86_64-apple-darwin17.7.0/8.2.0/lto-wrapper
Target: x86_64-apple-darwin17.7.0
Configured with: ../configure --build=x86_64-apple-darwin17.7.0
--prefix=/usr/local/Cellar/gcc/8.2.0
--libdir=/usr/local/Cellar/gcc/8.2.0/lib/gcc/8
--enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-8
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr
--with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl
--with-system-zlib --enable-checking=release --with-pkgversion='Homebrew GCC
8.2.0' --with-bugurl=https://github.com/Homebrew/homebrew-core/issues
--disable-nls
Thread model: posix
gcc version 8.2.0 (Homebrew GCC 8.2.0)
Command line that triggers the bug:
$ gfortran -Wall -Wextra -fopenmp num_threads_as_loop_bounds.f90
(no compiler output/error messages)
Contents of num_threads_as_loop_bounds.f90:
program test
use omp_lib
implicit none
integer :: i
print *, "Combined construct:"
!$omp parallel do
do i = 1, omp_get_num_threads()
print *, i
end do
!$omp end parallel do
print *, "Nested constructs:"
!$omp parallel
!$omp do
do i = 1, omp_get_num_threads()
print *, i
end do
!$omp end do
!$omp end parallel
end program
Expected program output:
Combined construct:
1
3
4
2
Nested constructs:
2
3
4
1
Actual program output:
Combined construct:
1
Nested constructs:
2
3
4
1
>From gcc-bugs-return-614913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 18:31:04 2018
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Subject: [Bug middle-end/87256] New: hppa spends huge amount of time in synth_mult()
Date: Sat, 08 Sep 2018 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87256
Bug ID: 87256
Summary: hppa spends huge amount of time in synth_mult()
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Created attachment 44672
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44672&action=edit
bug.c
Performance hog initially noticed on http://www.xxhash.com project
(xxhash-0.6.5). When being compiled on hppa it takes hours for gcc. When being
compiled on x86_64 it takes seconds.
Minimal example:
// $ time /usr/bin/hppa2.0-unknown-linux-gnu-gcc -O2 -fomit-frame-pointer -c -o
bug.o bug.C
// real 0m9,051s
// user 0m9,040s
// sys 0m0,009s
void a (long);
void b (long long c, int s)
{
switch (s)
{
case 4:
c = 0;
case 6:
c = c * 13;
case 8:
c = c + 19;
case 28:
c = c * 0x85ebca77c2b2ae63LLU;
c = c * 9650029242287828579LL;
c = c * 9650029242287828579LL;
c = c * 9650029242287828579LL; /* this line adds 2 seconds: 7->9 */
c = c * 9650029242287828579LL; /* this line adds 2 seconds: 9->11 */
a (c);
}
}
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
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Sergei Trofimovich <slyfox at inbox dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |hppa-*
CC| |dave.anglin at bell dot net,
| |law at redhat dot com
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Reproducible on today's vanilla gcc-master as well:
./xgcc -B. -v
Reading specs from ./specs
COLLECT_GCC=./xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: hppa2.0-unknown-linux-gnu
Configured with: ../gcc/configure --target=hppa2.0-unknown-linux-gnu
--prefix=/home/slyfox/dev/git/gcc-hppa2.0/../gcc-hppa2.0-installed
--with-sysroot=/usr/hppa2.0-unknown-linux-gnu --disable-bootstrap
--enable-languages=c --disable-nls CFLAGS='-O2 -g' CXXFLAGS='-O2 -g'
Thread model: posix
gcc version 9.0.0 20180908 (experimental) (GCC)
$ ./xgcc -B. -O2 -fomit-frame-pointer -c -o bug.o bug.c -ftime-report
Time variable usr sys wall
GGC
phase opt and generate : 10.90 (100%) 0.00 ( 0%) 10.91 (100%)
464 kB ( 30%)
df live regs : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
tree PRE : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
23 kB ( 2%)
expand : 10.89 (100%) 0.00 ( 0%) 10.89 (100%)
50 kB ( 3%)
integrated RA : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
98 kB ( 6%)
TOTAL : 10.90 0.00 10.91
1543 kB
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.
$ perf record -- ./xgcc -B. -O2 -fomit-frame-pointer -c -o bug.o bug.c
-ftime-report
$ perf report | cat
96.49% cc1 cc1 [.] synth_mult
2.36% cc1 cc1 [.] optimize_function_for_size_p
0.34% cc1 cc1 [.] optimize_insn_for_size_p
0.32% cc1 cc1 [.] optimize_insn_for_speed_p
0.02% cc1 [kernel.vmlinux] [k] native_irq_return_iret
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
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--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
synth_mult() is called 57M times on this tiny sample.
I noticed there is a NUM_ALG_HASH_ENTRIES bucket size for already computed
algorithms for multiplication. The below tweak seems to workaround pathological
case:
--- a/gcc/expmed.h
+++ b/gcc/expmed.h
@@ -128,7 +128,7 @@ struct alg_hash_entry {
/* The number of cache/hash entries. */
#if HOST_BITS_PER_WIDE_INT == 64
-#define NUM_ALG_HASH_ENTRIES 1031
+#define NUM_ALG_HASH_ENTRIES 10311
#else
#define NUM_ALG_HASH_ENTRIES 307
#endif
$ ./xgcc -B. -O2 -fomit-frame-pointer -c -o bug.o bug.c -ftime-report
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 2%)
960 kB ( 62%)
phase parsing : 0.00 ( 0%) 0.00 ( 0%) 0.02 ( 4%)
109 kB ( 7%)
phase opt and generate : 0.39 (100%) 0.00 ( 0%) 0.46 ( 94%)
464 kB ( 30%)
preprocessing : 0.00 ( 0%) 0.00 ( 0%) 0.02 ( 4%)
9 kB ( 1%)
dominator optimization : 0.00 ( 0%) 0.00 ( 0%) 0.02 ( 4%)
1 kB ( 0%)
expand : 0.37 ( 95%) 0.00 ( 0%) 0.42 ( 86%)
50 kB ( 3%)
combiner : 0.01 ( 3%) 0.00 ( 0%) 0.01 ( 2%)
97 kB ( 6%)
initialize rtl : 0.01 ( 3%) 0.00 ( 0%) 0.00 ( 0%)
13 kB ( 1%)
verify RTL sharing : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 2%)
0 kB ( 0%)
TOTAL : 0.39 0.00 0.49
1543 kB
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.
>From gcc-bugs-return-614916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 20:40:15 2018
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Subject: [Bug ipa/87254] Inlining clones in trivial wrappers
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think the "stack growth" aspect of this issue is the same as PR 87094?
>From gcc-bugs-return-614917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 21:49:26 2018
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Subject: [Bug ipa/87254] Inlining clones in trivial wrappers
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #1)
> I think the "stack growth" aspect of this issue is the same as PR 87094?
It is quite possible that this is a DUP indeed, I'll let someone else decide.
Here, if IPA cleaned up after cloning (most of f's clone is behind if(0!=0)),
it might not even need the improved stack growth heuristic. But we also want
inlining when f's clone remains large, so changing that heuristic seems like
the right option.
Thanks for filing PR 87094 :-)
>From gcc-bugs-return-614918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:04:17 2018
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Subject: [Bug target/87257] New: i386 multilib build should be disabled for x86_64-apple-darwin18
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Bug ID: 87257
Summary: i386 multilib build should be disabled for
x86_64-apple-darwin18
Product: gcc
Version: 9.0
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The Xcode 10 release on x86_64-apple-darwin18 obsoletes i386 code generation as
its default behavior. This was achieved by having the 10.14 SDK's buried
/usr/lib/libSystem.tbd only expose the x86_64 symbols contained in the fat root
level /usr/lib/libSystem.dylib.
$ clang -m32 hello.c
ld: warning: The i386 architecture is deprecated for macOS (remove from the
Xcode build setting: ARCHS)
ld: warning: ignoring file
/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd,
missing required architecture i386 in file
/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
Undefined symbols for architecture i386:
"_printf", referenced from:
_main in hello-04a500.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
This can be fudged by installing the fall back header package for / so that the
/usr/lib/libSystem.dylib is used, but that package is slated for removal in a
later OS release and its use highly discouraged. So FSF gcc's configure should
be modified to default to disable-multilib for darwin18 and later.
>From gcc-bugs-return-614919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:16:25 2018
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr87030?
>From gcc-bugs-return-614920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:22:17 2018
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87258] New: vector<bool> useless offset
Date: Sat, 08 Sep 2018 22:22:00 -0000
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Bug ID: 87258
Summary: vector<bool> useless offset
Product: gcc
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Hello,
I guess nobody will care much since this is vector<bool>, but I don't
understand why _M_start is a _Bit_iterator. This means that it includes a
useless _M_offset that is always 0 (that's easy to check since operator[]
ignores it). It wastes some space. And since begin() returns _M_start, it also
makes it hard for the compiler to know that the beginning offset is always 0,
and we often generate a lot of dead code to handle the non-zero case.
Removing the offset would break the ABI, so I guess that's not going to fly.
(_M_finish is also not very space efficient with pointer+length where just the
size would work, but maybe it is faster?) As a comparison, sizeof(vector<bool>)
is 40 with libstdc++ and 24 with libc++ on x86_64 linux.
Maybe begin could return _Bit_iterator(_M_start._M_p, 0) instead of _M_start to
give more information to the compiler?
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
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--- Comment #3 from dave.anglin at bell dot net ---
On 2018-09-08 3:11 PM, slyfox at inbox dot ru wrote:
> -#define NUM_ALG_HASH_ENTRIES 1031
> +#define NUM_ALG_HASH_ENTRIES 10311
Does this help the compile time for xxhash?
>From gcc-bugs-return-614922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:31:12 2018
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Subject: [Bug target/87257] i386 multilib build should be disabled for x86_64-apple-darwin18
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
*** This bug has been marked as a duplicate of bug 87030 ***
>From gcc-bugs-return-614923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:31:31 2018
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |howarth.at.gcc at gmail dot com
--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
*** Bug 87257 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:39:20 2018
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
Date: Sat, 08 Sep 2018 22:39:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
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>From gcc-bugs-return-614925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 22:42:23 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Sat, 08 Sep 2018 22:42:00 -0000
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--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> ---
Just a few notes:
1. I'm not objecting to some kind of automation to switch off the 32b multiline
where the *target* system is >= 10.14/Darwin18 (someone needs to write it,
that's all).
2. Actually, you get the same failure on GNU-Linux if you try to configure
defaults on (for example) an x86_64 system without 32bit libs installed (one
has to add --disable-multilib there, or install 32b libs), so automation is not
the default on Linux.
3. I don't see why GCC should be subject to the vendor's support policy. As
far as I am concerned, with the right SDK / sysroot available, there's no
reason why a compiler *hosted* on x86-64-Darwin18 shouldn't be able to build
code for i686-darwin10 *target*.
>From gcc-bugs-return-614926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 23:07:52 2018
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
Date: Sat, 08 Sep 2018 23:07:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can be reproduced on x86_64-linux on the same testcase, just put a breakpoint
on
synth_mult and
(gdb) set var t = -8796714831421723037
(gdb) set cost_limit->cost = 128
(gdb) set cost_limit->latency = 128
there is quite a recursion. Or even on
unsigned long long foo (unsigned long long x) { return x *
-8796714831421723037LL; }
with -O2 and the same manually bumped cost/latency on the outermost synth_mult.
If I instrument synth_mult, in this case there are 4897996 calls to synth_mult,
different counts at various levels of synth_mult recursion (first number is
number of synth_mult callers of synth_mult, the second number how many such
synth_mult calls have been made):
0 2
1 5
2 16
3 36
4 98
5 231
6 528
7 1112
8 2127
9 4007
10 7492
11 13147
12 22400
13 36880
14 59282
15 93213
16 141522
17 201388
18 271570
19 359030
20 440279
21 505613
22 571884
23 587240
24 518362
25 409409
26 299289
27 195388
28 102828
29 40657
30 10932
31 1897
32 132
In any case, with very small cost of addition and shifts and extremely high
cost and latency of multiplication, we seem to spend way too much trying to
find an optimal synthetic multiplication sequence.
>From gcc-bugs-return-614927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 23:27:51 2018
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
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--- Comment #5 from Sergei Trofimovich <slyfox at inbox dot ru> ---
(In reply to dave.anglin from comment #3)
> On 2018-09-08 3:11 PM, slyfox at inbox dot ru wrote:
> > -#define NUM_ALG_HASH_ENTRIES 1031
> > +#define NUM_ALG_HASH_ENTRIES 10311
> Does this help the compile time for xxhash?
A bit: it shrinks compile time from 80s to 13s (other targets do it in
sub-second times).
Ran the build against gcc master as:
${HOME}/dev/git/gcc-hppa2.0/gcc/xgcc -B${HOME}/dev/git/gcc-hppa2.0/gcc/ -O2
-pipe -fdiagnostics-show-option -frecord-gcc-switches -Wall -Wextra -Wcast-qual
-Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum
-Wdeclaration-after-statement -Wstrict-prototypes -Wundef -c -o xxhash.o
xxhash.c -ftime-report
Before the patch:
Time variable usr sys
wall GGC
expand : 82.20 ( 93%) 0.01 ( 7%) 82.94 (
93%) 4372 kB ( 11%)
TOTAL : 88.11 0.14 89.06
40621 kB
After the patch:
Time variable usr sys
wall GGC
expand : 8.95 ( 68%) 0.00 ( 0%) 8.93 (
67%) 4372 kB ( 11%)
TOTAL : 13.15 0.08 13.24
40623 kB
perf record/report still shows most of time is dominated by synth_mult():
64.59% cc1 cc1 [.] synth_mult
3.00% cc1 cc1 [.] sd_lists_size
>From gcc-bugs-return-614928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 23:35:25 2018
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the above case, there are during the recursion 77608 synth_mult calls,
which might be ok, so indeed better hashing would help, but 10311 is too large
and is not a prime number. Plus this hash table is resolving all collisions by
evicting older cash entries.
That is perhaps fine for the toplevel synth_mult calls, but for the recursive
ones I guess we want to make sure we cache all the values needed to compute the
same toplevel call and perhaps only record the toplevel call's entry if it
would need to evict older entries.
So maybe use the current hash table + another temporary hash_map live just
during the outermost synth_mult call (and activate this behavior only if say
seeing a recursion count of 16)?
>From gcc-bugs-return-614929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 08 23:54:35 2018
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Subject: [Bug libstdc++/87258] vector<bool> useless offset
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #0)
> Maybe begin could return _Bit_iterator(_M_start._M_p, 0) instead of _M_start
> to give more information to the compiler?
Even if we can't change anything else, this seems worthwhile.
>From gcc-bugs-return-614930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 02:09:51 2018
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Subject: [Bug jit/64089] libgccjit.so.0.0.1 linkage failure on darwin
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--- Comment #20 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to mrs@gcc.gnu.org from comment #19)
> I'm fine with Backporting for affected branches.
So... that's still 6 and 7 at this point?
>From gcc-bugs-return-614931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 08:38:04 2018
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Subject: [Bug bootstrap/56703] problems with strsignal and maybe strstr due to varying const on return type
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--- Comment #6 from Yves Caniou <yves.caniou@ens-lyon.fr> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Yves Caniou from comment #4)
> > I have the same issue with gcc-4.8.2 compiling gcc-4.8.2, on a Intel(R)
> > Xeon(R) CPU E5-2630 0 @ 2.30GHz.
>
> What about with a newer, still-supported version?
At the moment, I only have sys-devel/gcc v-7.3.0-r3 installed, and compiled
with itself. The other supported version of gcc at the moment is 6.4.0-r1.
What do you want me to try exactly?
>From gcc-bugs-return-614932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 09:09:48 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87259] New: [9 Regression] ICE: error: definition in block 3 does not dominate use in block 2
Date: Sun, 09 Sep 2018 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87259
Bug ID: 87259
Summary: [9 Regression] ICE: error: definition in block 3 does
not dominate use in block 2
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: ktkachov at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Starting from r264126 I see:
$ cat solver.i
int a, b, c;
int *e;
float f;
void h() {
for (int g;;) {
float d = b, i = 0 / f, j = a / (f * f), k, l = 0 / d;
c = i + j;
g = l;
e[g] = c / d * k / d;
}
}
$ gcc solver.i -Ofast -c
solver.i: In function ‘h’:
solver.i:4:6: error: definition in block 3 does not dominate use in block 2
4 | void h() {
| ^
for SSA_NAME: d_19 in statement:
reciptmp.10_54 = 1.0e+0 / d_19;
during GIMPLE pass: recip
solver.i:4:6: internal compiler error: verify_ssa failed
0xf5b516 verify_ssa(bool, bool)
/home/marxin/Programming/gcc/gcc/tree-ssa.c:1188
0xc697d0 execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1950
0xc69fea execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-614933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 09:53:33 2018
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Subject: [Bug bootstrap/56703] problems with strsignal and maybe strstr due to varying const on return type
Date: Sun, 09 Sep 2018 09:53:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Try building a supported version of GCC. Nobody is going to fix anything in gcc
4.8.x now.
The errors you;re getting are not the same as the ones on SunOS, I suspect
you've copied a built GCC from one machine to another machine with a different
libc. That won't work, you need to build GCC for the specific machine.
>From gcc-bugs-return-614934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 09:55:24 2018
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Subject: [Bug bootstrap/56703] problems with strsignal and maybe strstr due to varying const on return type
Date: Sun, 09 Sep 2018 09:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |sparc-sun-solaris2.10
CC| |ro at gcc dot gnu.org
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Jay, is the original problem on SunOS still happening?
Rainer, any insight into that build failure? Are some Solaris patches needed?
>From gcc-bugs-return-614935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 10:01:32 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84201] 549.fotonik3d_r from SPEC2017 fails verification with -mprefer-vector-width%6 or 512 on Zen
Date: Sun, 09 Sep 2018 10:01:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-09
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |6.4.0, 7.3.0, 8.2.0, 9.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Same happens on an Intel machine with -march=skylake. The issue is as old as
the skylake option (GCC 6.1+), bisection will not help us here. I can reproduce
that on a Haswell machine with the march option.
>From gcc-bugs-return-614936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 10:29:17 2018
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/87260] New: [8 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Sun, 09 Sep 2018 10:29:00 -0000
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Bug ID: 87260
Summary: [8 Regression] go fails to build a simple program on
arm-linux-gnueabihf
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
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this works with the gcc-7-branch, not with the gcc-8-branch. binutils is
2.31.1, glibc is 2.28.
GO=go-8
WORKDIR=$(mktemp -d)
trap "rm -rf $WORKDIR" 0 INT QUIT ABRT PIPE TERM
cd $WORKDIR
cat <<EOF > hello.go
package main
import "fmt"
func main() {
fmt.Println("hello world")
}
EOF
$GO run hello.go
$GO build hello.go
echo "build: OK"
ldd hello
[ -x hello ]
./hello
echo "run: OK"
outputs ...
/tmp/go-build749805653/b001/_buildid.s: Assembler messages:
/tmp/go-build749805653/b001/_buildid.s:8: Error: junk at end of line, first
unrecognized character is `,'
/tmp/go-build749805653/b001/_buildid.s:9: Error: junk at end of line, first
unrecognized character is `,'
GCC is configured with
Configured with: -v
--with-pkgversion='Ubuntu 8.2.0-5ubuntu2'
--with-bugurl='file:///usr/share/doc/gcc-8/README.Bugs'
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++
--prefix=/usr
--with-gcc-major-version-only
--program-suffix=-8
--program-prefix=arm-linux-gnueabihf-
--enable-shared
--enable-linker-build-id
--libexecdir=/usr/lib
--without-included-gettext
--enable-threads=posix
--libdir=/usr/lib
--enable-nls
--with-sysroot=/
--enable-clocale=gnu
--enable-libstdcxx-debug
--enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new
--enable-gnu-unique-object
--disable-libitm
--disable-libquadmath
--disable-libquadmath-support
--enable-plugin
--enable-default-pie
--with-system-zlib
--with-target-system-zlib
--enable-objc-gc=auto
--enable-multiarch
--enable-multilib
--disable-sjlj-exceptions
--with-arch=armv7-a
--with-fpu=vfpv3-d16
--with-float=hard
--with-mode=thumb
--disable-werror
--enable-multilib
--enable-checking=release
--build=arm-linux-gnueabihf
--host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf
>From gcc-bugs-return-614937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 11:59:55 2018
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Subject: [Bug go/87260] [8 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Sun, 09 Sep 2018 11:59:00 -0000
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--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
Created attachment 44673
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44673&action=edit
Possible patch
Does this patch fix the problem?
>From gcc-bugs-return-614938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 13:29:03 2018
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From: "mcccs at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87261] New: Optimize bool expressions
Date: Sun, 09 Sep 2018 13:29:00 -0000
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Bug ID: 87261
Summary: Optimize bool expressions
Product: gcc
Version: 9.0
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(~x & y) | ~(x | y)
(x | y) ^ (x | ~y)
(x & y) | ~(x | y)
(~x | y) ^ (x ^ y)
(x ^ y) | ~(x | y)
Patch ready, will send it soon. Submitted here to reserve a `prABCDE.c` file in
gcc.dg.
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
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--- Comment #7 from janus at gcc dot gnu.org ---
(In reply to janus from comment #6)
> I have verified that the patch in comment 5 shows no failures in the
> testsuite.
Despite that, it's still not fully correct. In fact it rejects the following
test case:
module m
implicit none
type :: t
private
procedure(), pointer, nopass, public :: ptr
end type
end module
program p
use m
implicit none
type(t) :: dt
dt%ptr => null()
end
I'm surprised that the testsuite does not seem to cover such a case.
>From gcc-bugs-return-614940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 15:19:00 2018
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Sun, 09 Sep 2018 15:19:00 -0000
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--- Comment #4 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
A couple notes here.
1) As I mentioned in the duplicate PR 87257, Apple achieved the obsoleting of
the i386 support in Xcode 10 through the libSystem.tbd in the 10.14 SDK's
buried /usr/lib/libSystem.tbd which only exposes the x86_64 symbols from the
root level /usr/lib/libSystem.dylib. So one could hack continued support for
i386 in for awhile more if gcc replaced its -lSystem linkage with an explicit
/usr/lib/libSystem.dylib linkage.
2) Since the default behavior for the command line tools from Xcode 10 are to
not install the SDK in the root directory, the gcc compiler needs to be
bootstrapped with--with-sysroot=$SDK_PATH to build under Xcode 10 on 10.14.
This issue doesn't exist on 10.13 which still installs the system headers in
the root directory.
>From gcc-bugs-return-614941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 15:21:30 2018
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Sun, 09 Sep 2018 15:21:00 -0000
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--- Comment #8 from janus at gcc dot gnu.org ---
This should finally be the proper fix:
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index 03298833c98..3d19ad479e5 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -10570,7 +10570,8 @@ match_binding_attributes (gfc_typebound_proc* ba, bool
generic, bool ppc)
done:
if (ba->access == ACCESS_UNKNOWN)
- ba->access = gfc_typebound_default_access;
+ ba->access = ppc ? gfc_current_block()->component_access
+ : gfc_typebound_default_access;
if (ppc && !seen_ptr)
{
>From gcc-bugs-return-614942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 15:43:46 2018
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Subject: [Bug c++/87262] New: Static Code Analysis Findings
Date: Sun, 09 Sep 2018 15:43:00 -0000
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Bug ID: 87262
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Dead Code - At Line: 377 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/basic_string.h
Memory Leak - At Line: 607 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/basic_string.tcc
Memory Leak - At Line: 1282 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/hashtable.h
Memory Leak - At Line: 1312 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/hashtable.h
Memory Leak - At Line: 1426 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/hashtable.h
Memory Leak - At Line: 496 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/hashtable_policy.h
Memory Leak - At Line: 522 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/hashtable_policy.h
Missing Check against Null - At Line: 139 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/locale_classes.tcc
Type Mismatch: Signed to Unsigned - At Line: 77 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/move.h
Poor Style: Redundant Initialization - At Line: 175 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/move.h
Use After Free - At Line: 743 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/shared_ptr_base.h
Type Mismatch: Signed to Unsigned - At Line: 1143 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_deque.h
Type Mismatch: Signed to Unsigned - At Line: 739 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_iterator.h
Memory Leak - At Line: 1553 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_list.h
Memory Leak - At Line: 1561 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_list.h
Type Mismatch: Signed to Unsigned - At Line: 874 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_list.h
Dead Code - At Line: 1586 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_list.h
Type Mismatch: Signed to Unsigned - At Line: 849 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_map.h
Type Mismatch: Signed to Unsigned - At Line: 645 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_set.h
Memory Leak - At Line: 659 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_tree.h
Memory Leak - At Line: 659 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_tree.h
Memory Leak - At Line: 997 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_tree.h
Memory Leak - At Line: 1147 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_vector.h
Memory Leak - At Line: 1147 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_vector.h
Type Mismatch: Signed to Unsigned - At Line: 1143 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_vector.h
Type Mismatch: Signed to Unsigned - At Line: 168 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_vector.h
Type Mismatch: Signed to Unsigned - At Line: 879 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/stl_vector.h
Memory Leak - At Line: 381 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Memory Leak - At Line: 381 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Memory Leak - At Line: 425 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Memory Leak - At Line: 514 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Memory Leak - At Line: 514 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Memory Leak - At Line: 565 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Dead Code - At Line: 69 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bits/vector.tcc
Dead Code - At Line: 1025 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bitset
Dead Code - At Line: 806 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/bitset
Dead Code - At Line: 102 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/ext/new_allocator.h
Format String - At Line: 95 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/ext/string_conversions.h
Portability Flaw - At Line: 89 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/ext/string_conversions.h
Uninitialized Variable - At Line: 77 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/ext/string_conversions.h
Path Manipulation - At Line: 540 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/fstream
Dead Code - At Line: 1938 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/functional
Dead Code - At Line: 1942 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/functional
Type Mismatch: Signed to Unsigned - At Line: 75 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/initializer_list
Dead Code - At Line: 435 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/ostream
Type Mismatch: Signed to Unsigned - At Line: 743 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/tuple
Out-of-Bounds Read: Off-by-One - At Line: 270 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/tuple
Code Correctness: Function Not Invoked - At Line: 251 of File:
opt/buildtools-network/gcc-4.8.2/include/c++/4.8.2/x86_64-unknown-linux-gnu/bits/gthr-default.h
>From gcc-bugs-return-614943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 15:48:49 2018
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Subject: [Bug c++/87262] Static Code Analysis Findings
Date: Sun, 09 Sep 2018 15:48:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
4.8.2 belongs in a museum. If you want to perform some static analysis on
trunk, you may find someone to look at the output, but with an old version I
think you are wasting your time...
>From gcc-bugs-return-614944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 17:50:40 2018
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
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--- Comment #5 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Iain Sandoe from comment #3)
>
> 3. I don't see why GCC should be subject to the vendor's support policy. As
> far as I am concerned, with the right SDK / sysroot available, there's no
> reason why a compiler *hosted* on x86-64-Darwin18 shouldn't be able to build
> code for i686-darwin10 *target*.
That makes the assumption that the cctools in some future macOS release won't
obsolete out the code for support i386 assembly and linkage. I wouldn't be
surprised if that actually happened should Apple start making
arm64-apple-darwin a thing.
>From gcc-bugs-return-614945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 18:06:25 2018
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85666
--- Comment #12 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Author: hp
Date: Sun Sep 9 18:05:48 2018
New Revision: 264182
URL: https://gcc.gnu.org/viewcvs?rev=264182&root=gcc&view=rev
Log:
PR target/85666
* config/mmix/mmix.c (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS): Don't
call leaf_function_p, instead use has_hard_reg_initial_val.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mmix/mmix.c
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Sun, 09 Sep 2018 18:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85666
--- Comment #13 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Author: hp
Date: Sun Sep 9 18:12:14 2018
New Revision: 264183
URL: https://gcc.gnu.org/viewcvs?rev=264183&root=gcc&view=rev
Log:
PR target/85666
* config/mmix/mmix.c (mmix_assemble_integer): Handle byte-size
non-CONST_INT rtx:es using assemble_integer_with_op ".byte".
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mmix/mmix.c
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Subject: [Bug target/86794] mmix port needs updating for CVE-2017-5753
Date: Sun, 09 Sep 2018 18:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86794
--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Author: hp
Date: Sun Sep 9 18:13:18 2018
New Revision: 264184
URL: https://gcc.gnu.org/viewcvs?rev=264184&root=gcc&view=rev
Log:
PR target/86794
* config/mmix/mmix.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Redefine
to speculation_safe_value_not_needed.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mmix/mmix.c
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Sun, 09 Sep 2018 18:42:00 -0000
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Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-09
Assignee|unassigned at gcc dot gnu.org |hp at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #14 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
I'll build the gcc-8 branch too before closing this. Milestone set as fixed
for trunk.
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Subject: [Bug target/86794] mmix port needs updating for CVE-2017-5753
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--- Comment #2 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86794, which changed state.
Bug 86794 Summary: mmix port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86794
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Sun, 09 Sep 2018 18:46:00 -0000
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--- Comment #20 from rguenther at suse dot de <rguenther at suse dot de> ---
On September 6, 2018 12:58:33 PM GMT+01:00, "dave.anglin at bell dot net"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
>
>--- Comment #16 from dave.anglin at bell dot net ---
>On 2018-09-05 7:38 PM, dave.anglin at bell dot net wrote:
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
>>
>> --- Comment #15 from dave.anglin at bell dot net ---
>> On 2018-09-05 7:21 PM, dave.anglin at bell dot net wrote:
>>> Doing a "&" operation on a function pointer looks bad.
>> No, I misread this line "_12 = SR.13_1 == operator!=;". It looks
>like
>> an expand problem.
>We only get canonicalization of function pointers when we expand using
>do_compare_and_jump().
>In the ifcombine pass, we transform the operation to "_12 = SR.13_1 ==
>operator!=;". I believe this
>expands to one of the scc patterns without canonicalization.
In the last patch you replace arg0 || arg1 with arg0 & & arg1, that looks
wrong. Otherwise the patch looks OK.
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
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--- Comment #3 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Mine.
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Sun, 09 Sep 2018 19:50:00 -0000
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--- Comment #21 from dave.anglin at bell dot net ---
On 2018-09-09 2:46 PM, rguenther at suse dot de wrote:
> In the last patch you replace arg0 || arg1 with arg0 & & arg1, that looks
> wrong. Otherwise the patch looks OK.
It was intentional. See the comment in dojump.c:
 /* If function pointers need to be "canonicalized" before they can
    be reliably compared, then canonicalize them.
    Only do this if *both* sides of the comparison are function pointers.
    If one side isn't, we want a noncanonicalized comparison. See PR
    middle-end/17564. */
 if (targetm.have_canonicalize_funcptr_for_compare ()
     && POINTER_TYPE_P (TREE_TYPE (treeop0))
     && POINTER_TYPE_P (TREE_TYPE (treeop1))
     && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0)))
     && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop1))))
Based on this, I thought that we could allow do_store_flag to output a
"scc" instruction
when both sides weren't function or method pointers.
I just looked at the testcase for middle-end/17564. I think we also
have to handle
pointers to void types. Looks like fix for 17564 was wrong...
I also missed updating a similar bit of code in match.pd with
POINTER_TYPE_P and
FUNC_OR_METHOD_TYPE_P.
I'm not 100% certain about the need for the code in fold-const.c and
match.pd.
Dave
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Subject: =?UTF-8?B?W0J1ZyBvdGhlci83ODA2OF0gd2FybmluZzogaW1wbGljaXQgZGVjbGFyYXRp?= =?UTF-8?B?b24gb2YgZnVuY3Rpb24g4oCYdGltZeKAmTsgZGlkIHlvdSBtZWFuIOKAmG5p?= =?UTF-8?B?Y2XigJk/IFstV2ltcGxpY2l0LWZ1bmN0aW9uLWRlY2xhcmF0aW9uXQ==?Date: Sun, 09 Sep 2018 21:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78068
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
My patch for PR 82967 fixes this, with test coverage for this case; marking
this one as a duplicate of that one.
*** This bug has been marked as a duplicate of bug 82967 ***
>From gcc-bugs-return-614955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 21:37:26 2018
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Subject: [Bug c/82967] "did you mean" suggestions are way too suggestive
Date: Sun, 09 Sep 2018 21:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82967
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #8 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
*** Bug 78068 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 21:39:18 2018
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Subject: [Bug c/82967] "did you mean" suggestions are way too suggestive
Date: Sun, 09 Sep 2018 21:39:00 -0000
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--- Comment #9 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #8)
> *** Bug 78068 has been marked as a duplicate of this bug. ***
This one had "time" vs "nice", which the patch has test coverage for, via:
+ ASSERT_NOT_SUGGESTED_FOR ("nice", "time");
>From gcc-bugs-return-614957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 22:03:19 2018
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
Date: Sun, 09 Sep 2018 22:03:00 -0000
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--- Comment #4 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Patch available: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00484.html
>From gcc-bugs-return-614958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 22:38:36 2018
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87263] New: ICE on valid code at -O1: verify_ssa failed
Date: Sun, 09 Sep 2018 22:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87263
Bug ID: 87263
Summary: ICE on valid code at -O1: verify_ssa failed
Product: gcc
Version: unknown
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Priority: P3
Component: tree-optimization
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It appears to be a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180909 (experimental) [trunk revision 264184] (GCC)
$
$ gcctk -O0 small.c
$
$ gcctk -O1 small.c
small.c: In function ‘main’:
small.c:22:1: error: definition in block 5 does not dominate use in block 6
22 | }
| ^
for SSA_NAME: k_16 in statement:
_6 = c.3_5 > k_16;
during GIMPLE pass: fre
small.c:22:1: internal compiler error: verify_ssa failed
0xfd4163 verify_ssa(bool, bool)
../../gcc-source-trunk/gcc/tree-ssa.c:1188
0xc8bb43 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1950
0xc8c469 execute_todo
../../gcc-source-trunk/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------------------
int a, b, c;
int main ()
{
int g, *h[3] = {&g, &g, &g};
if (h[2] == 0)
;
else
{
int i[1];
if (a)
while (a)
L:;
else
{
int k = b;
}
}
if ((b < c) > b)
goto L;
return 0;
}
>From gcc-bugs-return-614959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 22:39:05 2018
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From: "skvadrik at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87264] New: missed optimization of std::find_if (predicate inlining)
Date: Sun, 09 Sep 2018 22:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87264
Bug ID: 87264
Summary: missed optimization of std::find_if (predicate
inlining)
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: skvadrik at gmail dot com
Target Milestone: ---
A recent talk on the C++ Russia conference showed GCC performing ~1.5x worse
than Clang on a simple test that calls std::find_if on a large std::vector:
http://cppconf.ru/talks/mikhail-matrosov (talk)
https://github.com/mmatrosov/ExtractRight (benchmark code)
GCC's poor performance is caused by not inlining std::find_if and not
specializing it for the predicates. A number of factors contribute to this, so
I created a simplified benchmark (bench.cpp in attach) that can be compiled
with -D<FACTOR> options to show the impact of different factors on the
compilation. On -O3 level, dropping any of the defines results in ~1.5x
speedup, so that GCC becomes comparable to Clang. On -O2 it gets a bit harder,
but some combinations of the defines still have effect. See full bench results
below.
The benchmark code includes copy-pasted parts of the <algorithm> header (GCC's
headers are used with both GCC and Clang).
Factors are:
-DUNROLL: use the manually unrolled specialized implementation of std::find_if
for random iterators (also complained about in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84170), as opposed to the default
implementation for input iterators
-DWRAP: wrap function pointer (predicate) in a small class that stores the
pointer and confuses constant propagation (part of GCC's implementation of
<algorithm>)
-DFNPTR: use functions as predicates (the alternative is to use functor objects
that are much better inlined)
-DARG: one extra argument to std::find_if implementation, even unused, confuses
constant propagation and inlining
Benchmark results are as follows (see run_bench.sh in attach):
$ uname -por
4.17.0-gentoo Intel(R) Core(TM) i3 CPU M 350 @ 2.27GHz GNU/Linux
$ ./run_bench
gcc -O3 -DUNROLL -DWRAP -DFNPTR -DARG: 0.32 1.78x slower
clang -O3 -DUNROLL -DWRAP -DFNPTR -DARG: 0.18
gcc -O3 -DWRAP -DFNPTR -DARG: 0.23 1.15x slower
clang -O3 -DWRAP -DFNPTR -DARG: 0.20
gcc -O3 -DUNROLL -DFNPTR -DARG: 0.22 1.16x slower
clang -O3 -DUNROLL -DFNPTR -DARG: 0.19
gcc -O3 -DUNROLL -DWRAP -DARG: 0.22 1.16x slower
clang -O3 -DUNROLL -DWRAP -DARG: 0.19
gcc -O3 -DUNROLL -DWRAP -DFNPTR : 0.23 1.28x slower
clang -O3 -DUNROLL -DWRAP -DFNPTR : 0.18
gcc -O3 : 0.24 1.14x slower
clang -O3 : 0.21
gcc -O2 -DUNROLL -DWRAP -DFNPTR -DARG: 0.38 2.11x slower
clang -O2 -DUNROLL -DWRAP -DFNPTR -DARG: 0.18
gcc -O2 -DWRAP -DFNPTR -DARG: 0.29 1.38x slower
clang -O2 -DWRAP -DFNPTR -DARG: 0.21
gcc -O2 -DUNROLL -DFNPTR -DARG: 0.38 2.11x slower
clang -O2 -DUNROLL -DFNPTR -DARG: 0.18
gcc -O2 -DUNROLL -DWRAP -DARG: 0.27 1.42x slower
clang -O2 -DUNROLL -DWRAP -DARG: 0.19
gcc -O2 -DUNROLL -DWRAP -DFNPTR : 0.37 2.06x slower
clang -O2 -DUNROLL -DWRAP -DFNPTR : 0.18
gcc -O2 : 0.29 1.45x slower
clang -O2 : 0.20
I can't say it's a *bug*, but it definitely hurts to see GCC being that much
slower than Clang for no good reason. People do write code like this all the
time (if they use STL).
I see different possible ways to fix this:
1. don't use "unrolled" std::find_if specialization unless the predicate is
inlined
2. use more aggressive inlining for simple predicates to STL algorithms
Option 2 is desirable anyway.
>From gcc-bugs-return-614960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 09 22:41:29 2018
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Subject: [Bug tree-optimization/87264] missed optimization of std::find_if (predicate inlining)
Date: Sun, 09 Sep 2018 22:41:00 -0000
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Ulya <skvadrik at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |skvadrik at gmail dot com
--- Comment #1 from Ulya <skvadrik at gmail dot com> ---
Created attachment 44674
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44674&action=edit
bench.cpp, run_bench.sh and assembly dumps for all compinations of defines
>From gcc-bugs-return-614961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 00:55:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/69578] -Wuninitialized not issuing warning.
Date: Mon, 10 Sep 2018 00:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69578
Peter Selinger <selinger at mathstat dot dal.ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |selinger at mathstat dot dal.ca
--- Comment #4 from Peter Selinger <selinger at mathstat dot dal.ca> ---
I ran into the same bug with this code:
double weight() {
double sum;
int i;
for (i=0; i<10; i++) {
sum++;
}
return sum;
}
With -Wuninitialized or -Wmaybe-uninitialized, no warning is generated with
-O0. The warning is generated with -O1, -O2, -O3. Other compilers (such as
clang) generate the warning correctly.
Confirmed with gcc 8.2.0.
>From gcc-bugs-return-614962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 02:10:21 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/87265] New: makeinfo cannot process path names with @ special character
Date: Mon, 10 Sep 2018 02:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87265
Bug ID: 87265
Summary: makeinfo cannot process path names with @ special
character
Product: gcc
Version: 4.4.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
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$ pwd
/home/10156314@zte.intra/CK-TOOLS/gcc-milepost-4.4.4-linux-64/obj
$ make V=1
......
make[3]: Leaving directory
'/home/10156314@zte.intra/CK-TOOLS/gcc-milepost-4.4.4-linux-64/obj/libdecnumber'
make[3]: Entering directory
'/home/10156314@zte.intra/CK-TOOLS/gcc-milepost-4.4.4-linux-64/obj/gcc'
if [ xinfo = xinfo ]; then \
makeinfo --split-size=5000000 --split-size=5000000 --split-size=5000000
--no-split -I . -I ../../milepost-gcc-4.4.4/gcc/doc \
-I ../../milepost-gcc-4.4.4/gcc/doc/include -o doc/gcc.info
../../milepost-gcc-4.4.4/gcc/doc/gcc.texi; \
fi
../../milepost-gcc-4.4.4/gcc/doc/gcc.texi:89: warning: @tex should only appear
at a line beginning
../../milepost-gcc-4.4.4/gcc/doc/gcc.texi:89: warning: @end should only appear
at a line beginning
../../milepost-gcc-4.4.4/gcc/doc/gcc.texi:91: warning: @tex should only appear
at a line beginning
../../milepost-gcc-4.4.4/gcc/doc/gcc.texi:91: warning: @end should only appear
at a line beginning
../../milepost-gcc-4.4.4/gcc/doc/invoke.texi:1300: misplaced {
../../milepost-gcc-4.4.4/gcc/doc/invoke.texi:1300: unknown command `zte'
../../milepost-gcc-4.4.4/gcc/doc/invoke.texi:1300: misplaced }
../../milepost-gcc-4.4.4/gcc/doc/invoke.texi:1300: @include: could not find
/home/10156314.intra/CK-TOOLS/gcc-milepost-4.4.4-linux-64/obj/gcc/../../milepost-gcc-4.4.4/gcc/../libiberty/at-file.texi
The 1300th line code cannot handle the path names with @ special characters：
1299
1300 @include {@value{srcdir}}/../libiberty/at-file.texi
1301 @end table
We should escape the special character(@) here.
>From gcc-bugs-return-614964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 02:14:11 2018
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Subject: [Bug bootstrap/57076] @ in the src directory name causes failure while building of gcc.info
Date: Mon, 10 Sep 2018 02:14:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |yellowriver2010 at hotmail dot com
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87265 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-614963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 02:14:11 2018
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Subject: [Bug libgcc/87265] makeinfo cannot process path names with @ special character
Date: Mon, 10 Sep 2018 02:14:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 57076.
*** This bug has been marked as a duplicate of bug 57076 ***
>From gcc-bugs-return-614965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 02:50:08 2018
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From: "yellowriver2010 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/87265] makeinfo cannot process path names with @ special character
Date: Mon, 10 Sep 2018 02:50:00 -0000
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--- Comment #2 from Wen Yang <yellowriver2010 at hotmail dot com> ---
The latest GCC also has the same problem.
make[3]: Entering directory '/home/10156314@zte.intra/build_gcc/gcc'
if [ xinfo = xinfo ]; then \
makeinfo --split-size=5000000 --split-size=5000000 --split-size=5000000
--no-split -I . -I ../../gcc/gcc/doc \
-I ../../gcc/gcc/doc/include -o doc/gcc.info
../../gcc/gcc/doc/gcc.texi; \
fi
../../gcc/gcc/doc/invoke.texi:1783: unknown command `zte'
../../gcc/gcc/doc/invoke.texi:1783: @include: could not find
/home/10156314.intra/build_gcc/gcc/../../gcc/gcc/../libiberty/at-file.texi
Makefile:3232: recipe for target 'doc/gcc.info' failed
make[3]: *** [doc/gcc.info] Error 1
1783 @include @value{srcdir}/../libiberty/at-file.texi
1784 @end table
>From gcc-bugs-return-614966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 03:58:43 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87266] New: [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
Date: Mon, 10 Sep 2018 03:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87266
Bug ID: 87266
Summary: [9 Regression] ICE: Segmentation fault (in
useless_type_conversion_p, tree_nop_conversion_p, or
is_gimple_reg_type)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180909 snapshot (r264185; actually, gcc-9.0.0-alpha20180902,
r264045) ICEs when compiling the following snippet w/ -O2 (-O3, -Ofast, -Os)
-fno-tree-ccp -fno-tree-forwprop:
1.
void
iw (int gu, int mq, int r2)
{
int yn = 0;
while (gu < 1)
{
for (;;)
;
bb:;
int ay = 0;
while (ay < 1)
++mq;
}
if (yn != 0)
goto up;
if (0)
{
up:
if (r2 == 0)
goto bb;
}
goto up;
}
% gcc-9.0.0-alpha20180909 -O2 -fno-tree-ccp -fno-tree-forwprop -c nuni7epw.c
during GIMPLE pass: fre
nuni7epw.c: In function 'iw':
nuni7epw.c:29:1: internal compiler error: Segmentation fault
29 | }
| ^
0xcb76df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/toplev.c:325
0xa197c0 useless_type_conversion_p(tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-expr.c:70
0xe4065f may_propagate_copy(tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-propagate.c:1260
0xcf78fc gimple_merge_blocks
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfg.c:2070
0x89ab0f merge_blocks(basic_block_def*, basic_block_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/cfghooks.c:793
0xd05061 cleanup_tree_cfg_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:719
0xd063e8 cleanup_tree_cfg_noloop
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:905
0xd063e8 cleanup_tree_cfg()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:989
0xbd71ec execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1896
0xbd804e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1997
2.
--- nuni7epw.c.jj 2018-09-10 10:54:29.671619781 +0700
+++ nuni7epw.c 2018-09-10 10:54:37.730536962 +0700
@@ -11,7 +11,7 @@ iw (int gu, int mq, int r2)
bb:;
int ay = 0;
- while (ay < 1)
+ while (yn < 1)
++mq;
}
% gcc-9.0.0-alpha20180909 -O2 -fno-tree-ccp -fno-tree-forwprop -c nuni7epw.c
during GIMPLE pass: fre
nuni7epw.c: In function 'iw':
nuni7epw.c:29:1: internal compiler error: Segmentation fault
29 | }
| ^
0xcb76df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/toplev.c:325
0xf482d9 tree_nop_conversion_p(tree_node const*, tree_node const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree.c:12184
0x10c3c18 gimple_simplify_166
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:8176
0x10d323d gimple_simplify_LE_EXPR
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:71030
0x10308d2 gimple_simplify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:86180
0x103276f gimple_resimplify2(gimple**, gimple_match_op*, tree_node*
(*)(tree_node*))
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-match-head.c:285
0x113bfb5 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-match-head.c:1012
0xd0587d cleanup_control_expr_graph
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:149
0xd0587d cleanup_control_flow_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:247
0xd05ff1 cleanup_control_flow_pre
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:757
0xd06379 cleanup_tree_cfg_noloop
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:881
0xd06379 cleanup_tree_cfg()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:989
0xbd71ec execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1896
0xbd804e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1997
3.
--- nuni7epw.c.jj 2018-09-10 10:54:29.671619781 +0700
+++ nuni7epw.c 2018-09-10 10:56:44.197236464 +0700
@@ -5,12 +5,12 @@ iw (int gu, int mq, int r2)
while (gu < 1)
{
+ int ay = 0;
+
for (;;)
;
- bb:;
- int ay = 0;
-
+ bb:
while (ay < 1)
++mq;
}
% gcc-9.0.0-alpha20180909 -O2 -fno-tree-ccp -fno-tree-forwprop -c nuni7epw.c
during GIMPLE pass: fre
nuni7epw.c: In function 'iw':
nuni7epw.c:29:1: internal compiler error: Segmentation fault
29 | }
| ^
0xcb76df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/toplev.c:325
0xa1ac91 is_gimple_reg_type
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-expr.h:75
0xa1ac91 is_gimple_val(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-expr.c:789
0xcff40a verify_gimple_phi
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfg.c:4975
0xcff40a verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfg.c:5303
0xbd715f execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1943
0xbd804e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1997
>From gcc-bugs-return-614967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 04:32:57 2018
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Subject: [Bug tree-optimization/87267] New: [9 Regression] ICE: Segmentation fault (in gimple_truth_valued_p)
Date: Mon, 10 Sep 2018 04:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87267
Bug ID: 87267
Summary: [9 Regression] ICE: Segmentation fault (in
gimple_truth_valued_p)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180909 snapshot (r264185; actually, gcc-9.0.0-alpha20180902,
r264045) ICEs when compiling the following snippet w/ -O2
-fno-tree-dominator-opts -fno-tree-forwprop:
unsigned long int
re (long int j9)
{
if (j9 == 0)
return 1;
return j9;
}
void
zq (int bt, int yy)
{
int p3 = 0, go = 4, ez = go;
while (go != 0)
{
if (ez + !!bt - re (bt) != 0 && go != 0)
{
if (yy != 0)
p3 = yy;
}
else
return;
go = 2;
}
}
void
my (unsigned long int n6, int bt, int yy)
{
zq (bt, yy);
n6 = n6 == bt;
zq (bt, yy);
}
% gcc-9.0.0-alpha20180909 -O2 -fno-tree-dominator-opts -fno-tree-forwprop -c
osda2bvg.c
during GIMPLE pass: pre
osda2bvg.c: In function 'my':
osda2bvg.c:30:1: internal compiler error: Segmentation fault
30 | my (unsigned long int n6, int bt, int yy)
| ^~
0xcb76df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/toplev.c:325
0x1029ab8 gimple_truth_valued_p(tree_node*, tree_node* (*)(tree_node*))
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:238
0x1126141 gimple_simplify_EQ_EXPR
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:72667
0x103087e gimple_simplify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/build/gcc/gimple-match.c:86182
0x103276f gimple_resimplify2(gimple**, gimple_match_op*, tree_node*
(*)(tree_node*))
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-match-head.c:285
0x113bfb5 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/gimple-match-head.c:1012
0xd0587d cleanup_control_expr_graph
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:149
0xd0587d cleanup_control_flow_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:247
0xd05ff1 cleanup_control_flow_pre
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:757
0xd06379 cleanup_tree_cfg_noloop
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:881
0xd06379 cleanup_tree_cfg()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfgcleanup.c:989
0xe9450c tail_merge_optimize(unsigned int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-tail-merge.c:1747
0xe3b39b execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-pre.c:4255
>From gcc-bugs-return-614968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 05:29:12 2018
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Subject: [Bug rtl-optimization/82982] [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
Date: Mon, 10 Sep 2018 05:29:00 -0000
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--- Comment #12 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce it anymore for both powerpc-e300c3-linux-gnu and
powerpc-e500v2-linux-gnuspe-gcc w/ gcc-9.0.0-alpha20180909 snapshot (rr264185).
>From gcc-bugs-return-614969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 05:30:00 2018
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Subject: [Bug rtl-optimization/83631] ICE: qsort checking failed: qsort comparator non-negative on sorted output: 7 with -fno-sched-rank-heuristic --param=max-sched-extend-regions-iters=4
Date: Mon, 10 Sep 2018 05:30:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce it for powerpc-e300c3-linux-gnu w/ gcc-9.0.0-alpha20180909
snapshot (r264185).
>From gcc-bugs-return-614970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 05:46:43 2018
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Subject: [Bug rtl-optimization/83631] ICE: qsort checking failed: qsort comparator non-negative on sorted output: 7 with -fno-sched-rank-heuristic --param=max-sched-extend-regions-iters=4
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--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
I can't reproduce it anymore as well.
>From gcc-bugs-return-614971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 06:51:14 2018
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Subject: [Bug c/87268] New: Missed optimization for a tailcall
Date: Mon, 10 Sep 2018 06:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87268
Bug ID: 87268
Summary: Missed optimization for a tailcall
Product: gcc
Version: 8.2.1
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For a simple code like this:
extern int shared;
void doit(int *);
int call_doit(){
doit(&shared);
}
when compiled with -O3 the resulting assembler is without tailcall
optimization:
call_doit:
subq $8, %rsp
movl $shared, %edi
call doit
addq $8, %rsp
ret
There are two thing that are probably not needed:
1. The whole "subq $8, %rsp / addq $8, %rsp" is not really necessary,
isn't it?
2. call instead of simple jmp, which would be possible due to tailcall
optimization. Possibly it was not performed, because subq/addq are still
hanging around.
If I'm not mistaken, something like:
call_doit:
movl $global, %edi
jmp doit
should be possible as output.
>From gcc-bugs-return-614972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 07:16:19 2018
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Subject: [Bug middle-end/87268] New: Missed optimization for a tailcall
Date: Mon, 10 Sep 2018 07:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87268
Bug ID: 87268
Summary: Missed optimization for a tailcall
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Component: middle-end
For a simple code like this:
extern int shared;
void doit(int *);
int call_doit(){
doit(&shared);
}
when compiled with -O3 the resulting assembler is without tailcall
optimization:
call_doit:
subq $8, %rsp
movl $shared, %edi
call doit
addq $8, %rsp
ret
There are two thing that are probably not needed:
1. The whole "subq $8, %rsp / addq $8, %rsp" is not really necessary,
isn't it?
2. call instead of simple jmp, which would be possible due to tailcall
optimization. Possibly it was not performed, because subq/addq are still
hanging around.
If I'm not mistaken, something like:
call_doit:
movl $global, %edi
jmp doit
should be possible as output.
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
warning: control reaches end of non-void function
If call_doit is changed to return void, we get a tail call.
Is doit meant to be noreturn? (surprisingly, the noreturn attribute is not
sufficient to get a tail call)
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Subject: [Bug middle-end/87268] Missed optimization for a tailcall
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So you might have undefined code in c if the return value is used there. In c++
it is undefined even without using it. Also noreturn is never sibcalled.
>From gcc-bugs-return-614974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 07:29:42 2018
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Subject: [Bug middle-end/87268] Missed optimization for a tailcall
Date: Mon, 10 Sep 2018 08:31:00 -0000
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--- Comment #3 from ead <noone@turm-lahnstein.de> ---
Sorry, I only saw that clang gives me what I expect... and overlooked the
warning.
call_doit should return void and not int.
>From gcc-bugs-return-614975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 08:31:49 2018
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Subject: [Bug tree-optimization/87267] [9 Regression] ICE: Segmentation fault (in gimple_truth_valued_p)
Date: Mon, 10 Sep 2018 08:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263875.
>From gcc-bugs-return-614976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 08:40:11 2018
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Subject: [Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
Date: Mon, 10 Sep 2018 09:22:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263875.
>From gcc-bugs-return-614977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 09:22:27 2018
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From: "matthew.hambley at metoffice dot gov.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/84554] make check: FAIL: tversion: ERROR! The versions of gmp.h (5.0.5) and libgmp (4.3.1) do not match.
Date: Mon, 10 Sep 2018 09:33:00 -0000
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--- Comment #4 from matthew.hambley at metoffice dot gov.uk ---
I have further information. From the build log: (long paths reduced with
ellipses)
.../gcc-8.2.0-build/./prev-gcc/xgcc
-B.../gcc/8.2.0/x86_64-pc-linux-gnu/sys-include -DTIME_WITH_SYS_TIME=1
-DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_LOCALE_H=1 -DHAVE_WCHAR_H=1
-DHAVE_STDARG=1 -DHAVE_SYS_TIME_H=1 -DHAVE_STRUCT_LCONV_DECIMAL_POINT=1
-DHAVE_STRUCT_LCONV_THOUSANDS_SEP=1 -DHAVE_ALLOCA_H=1 -DHAVE_STDINT_H=1
-DHAVE_VA_COPY=1 -DHAVE_SETLOCALE=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_LONG_LONG=1
-DHAVE_INTMAX_T=1 -DMPFR_HAVE_INTMAX_MAX=1 -DMPFR_HAVE_FESETROUND=1
-DHAVE_DENORMS=1 -DHAVE_SIGNEDZ=1 -DHAVE_ROUND=1 -DHAVE_TRUNC=1 -DHAVE_FLOOR=1
-DHAVE_CEIL=1 -DHAVE_NEARBYINT=1 -DHAVE_LDOUBLE_IEEE_EXT_LITTLE=1
-DMPFR_USE_THREAD_SAFE=1 -DMPFR_USE_C11_THREAD_SAFE=1 -DHAVE_CLOCK_GETTIME=1
-DLT_OBJDIR=\".libs/\" -DHAVE_ATTRIBUTE_MODE=1 -DHAVE___GMPN_ROOTREM=1
-DHAVE___GMPN_SBPI1_DIVAPPR_Q=1 -I. -I../../../gcc-8.2.0/mpfr/tests
-DSRCDIR='"../../../gcc-8.2.0/mpfr/tests"' -I../../../gcc-8.2.0/mpfr/src
-I../src -I.../gcc-8.2.0-build/./gmp -DNO_ASM -g -O2 -MT tversion.o -MD -MP -MF
.deps/tversion.Tpo -c -o tversion.o ../../../gcc-8.2.0/mpfr/tests/tversion.c
mv -f .deps/tversion.Tpo .deps/tversion.Po
/bin/sh ../libtool --tag=CC --mode=link .../gcc-8.2.0-build/./prev-gcc/xgcc
-B.../gcc-8.2.0-build/./prev-gcc/ -B.../gcc/8.2.0/x86_64-pc-linux-gnu/bin/
-B.../gcc/8.2.0/x86_64-pc-linux-gnu/bin/
-B.../gcc/8.2.0/x86_64-pc-linux-gnu/lib/ -isystem
.../gcc/8.2.0/x86_64-pc-linux-gnu/include -isystem
.../gcc/8.2.0/x86_64-pc-linux-gnu/sys-include -DNO_ASM -g -O2 -no-install
-L../src/.libs -static-libstdc++ -static-libgcc -o tversion tversion.o
libfrtests.la -lm ../src/libmpfr.la -lgmp
Notice that when tversion is compiled the argument
"-I.../gcc-8.2.0-build/./gmp" is specified which explains why it uses the
correct headers.
Further notice that when it is linked there is no corresponding "big Ell"
argument meaning that the "little Ell" reference to "gmp" will be satisfied
elsewhere.
Am I missing something when I configure the build?
>From gcc-bugs-return-614978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 09:33:41 2018
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Subject: [Bug tree-optimization/87263] [9 Regression] ICE on valid code at -O1: verify_ssa failed
Date: Mon, 10 Sep 2018 09:58:00 -0000
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----------------------------------------------------------------------------
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Summary|ICE on valid code at -O1: |[9 Regression] ICE on valid
|verify_ssa failed |code at -O1: verify_ssa
| |failed
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263980.
>From gcc-bugs-return-614979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 09:58:58 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Mon, 10 Sep 2018 11:05:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jack Howarth from comment #5)
> (In reply to Iain Sandoe from comment #3)
>
> >
> > 3. I don't see why GCC should be subject to the vendor's support policy. As
> > far as I am concerned, with the right SDK / sysroot available, there's no
> > reason why a compiler *hosted* on x86-64-Darwin18 shouldn't be able to build
> > code for i686-darwin10 *target*.
>
> That makes the assumption that the cctools in some future macOS release
> won't obsolete out the code for support i386 assembly and linkage. I
> wouldn't be surprised if that actually happened should Apple start making
> arm64-apple-darwin a thing.
We are not dependent on the Xcode supplied tools for some time now, since
upstream dsymutil is functional. So, if that were to happen - we would simply
(as the Linux folks do) build a complete toolchain rather than just the
compiler (i have a 'cctools' look-alike driver for the LLVM backend - and an
actual cctools assembler with the known bugs fixed).
To assist this, it would be helpful if fink, macports etc. could file radars
noting that the open source releases are very out of date for these components
(currently 8.2.1 compared with the released Xcode of 10.x)
>From gcc-bugs-return-614980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 11:05:50 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87262] Static Code Analysis Findings
Date: Mon, 10 Sep 2018 11:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I looked at a few of these and they're complete nonsense.
This is not a redundant initialization in std::swap:
_Tp __tmp = _GLIBCXX_MOVE(__a);
__a = _GLIBCXX_MOVE(__b);
__b = _GLIBCXX_MOVE(__tmp);
And the memory leaks are not leaks.
>From gcc-bugs-return-614981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 11:38:23 2018
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From: "wolfgang.roehrl@gi-de.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83428] Static initialization and struct with constexpr ctor
Date: Mon, 10 Sep 2018 11:49:00 -0000
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--- Comment #5 from Wolfgang Roehrl <wolfgang.roehrl@gi-de.com> ---
Hello,
I just came back from holidays and I read your comments on my bug report. For
two reasons I still think that the compiler should not use dynamic
initialization for objX - at least not without any warning:
a) According to my understanding the Standard requests static initialization
for a class-type variable whose constexpr constructor is invoked with
constant expressions (cf. C++17 Standard, 6.6.2/2;); and it is additionally
required that all sub-objects of the variable can also be initialized
statically.
But I don't see that the Standard requests that the ctor definition has to
precede the variable definition in order to get static initialization.
b) The behaviour of the compiler ist not user-friendly:
A program may rely on the static initialization of an object - especially if
the object contains atomic variables. Now somebody may modify the programm
and move the constructor definition unintentionally behind the definiton of
the object. The program still compiles but the program behaviour has
changed silently and to fix this kind of bugs can be very time-consuming.
With kind regards,
W. Roehrl
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/84402] [meta] GCC build system: parallelism bottleneck
Date: Mon, 10 Sep 2018 12:04:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #25 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me assign it.
>From gcc-bugs-return-614983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 12:04:59 2018
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From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Mon, 10 Sep 2018 12:19:00 -0000
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--- Comment #7 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
(In reply to Iain Sandoe from comment #6)
> We are not dependent on the Xcode supplied tools for some time now, since
> upstream dsymutil is functional. So, if that were to happen - we would
> simply (as the Linux folks do) build a complete toolchain rather than just
> the compiler (i have a 'cctools' look-alike driver for the LLVM backend -
> and an actual cctools assembler with the known bugs fixed).
>
While using the assembler from llvm should be straight forward enough, assuming
Apple didn't push its obsoleting of i386 changes upstream, the linker would be
a tricker issue since the llvm lld code hasn't been kept up on the Darwin side
for quite some time.
> To assist this, it would be helpful if fink, macports etc. could file radars
> noting that the open source releases are very out of date for these
> components (currently 8.2.1 compared with the released Xcode of 10.x)
I pinged Jeremy to see if he can nudge that along.
>From gcc-bugs-return-614984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 12:19:29 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87269] New: [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
Date: Mon, 10 Sep 2018 12:20:00 -0000
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Bug ID: 87269
Summary: [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475
starting from r261802
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
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Reporter: marxin at gcc dot gnu.org
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Created attachment 44675
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44675&action=edit
unreduced test-case
Starting from the revision I see:
$ g++ ice.ii -c
In file included from
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/JSCallbackObject.h:244,
from
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/glib/JSAPIWrapperGlobalObject.cpp:30:
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h:
In instantiation of ‘static JSC::EncodedJSValue
JSC::JSCallbackObject<Parent>::callbackGetter(JSC::ExecState*,
JSC::EncodedJSValue, JSC::PropertyName) [with Parent =
JSC::JSAPIWrapperGlobalObject; JSC::EncodedJSValue = long int]’:
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h:162:21:
required from ‘static bool
JSC::JSCallbackObject<Parent>::getOwnPropertySlot(JSC::JSObject*,
JSC::ExecState*, JSC::PropertyName, JSC::PropertySlot&) [with Parent =
JSC::JSAPIWrapperGlobalObject]’
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/glib/JSAPIWrapperGlobalObject.cpp:57:429:
required from here
/home/abuild/rpmbuild/BUILD/webkitgtk-2.22.0/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h:700:83:
internal compiler error: in tsubst_copy, at cp/pt.c:15513
0x645c85 tsubst_copy
/home/marxin/Programming/gcc/gcc/cp/pt.c:15513
0x9f046f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:19039
0x9ef398 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18309
0x9ef4ac tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18325
0x9ef4ac tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18325
0x9ef4ac tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18325
0x9d6fdb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:17455
0x9d4099 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:16646
0x9d4b54 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:16636
0x9d3fd9 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:16939
0xa054ae instantiate_decl(tree_node*, bool, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:24099
0xa094fb instantiate_pending_templates(int)
/home/marxin/Programming/gcc/gcc/cp/pt.c:24215
0x920408 c_parse_final_cleanups()
/home/marxin/Programming/gcc/gcc/cp/decl2.c:4709
I'm going to reduce the test-case.
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Subject: [Bug c++/87150] [8 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Mon, 10 Sep 2018 12:21:00 -0000
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--- Comment #15 from Stephan Bergmann <sbergman at redhat dot com> ---
I see that with the fix from comment 13 included, the slightly changed source
#include <utility>
struct S1 { S1(S1 &&); };
struct S2: S1 {};
S1 f(S2 s) { return std::move(s); }
causes -Wredundant-move (when that warning is explicitly requested).
>From gcc-bugs-return-614986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 12:21:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
Date: Mon, 10 Sep 2018 12:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-10
CC| |nathan at gcc dot gnu.org
Known to work| |8.2.0
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
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Subject: [Bug rtl-optimization/85458] FAIL: gcc.dg/pr83480.c (internal compiler error)
Date: Mon, 10 Sep 2018 12:39:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-09-10
Resolution|FIXED |---
Ever confirmed|0 |1
--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
Who has approved that commit? Please revert!
during RTL pass: mach
/usr/local/gcc/test/gcc/testsuite/gcc.c-torture/compile/20010102-1.c: In
function ‘_obstack_newchunk’:
/usr/local/gcc/test/gcc/testsuite/gcc.c-torture/compile/20010102-1.c:101:1:
internal compiler error: in sel_target_adjust_priority, at sel-sched.c:3333
0x40000000010bb68f sel_target_adjust_priority
../../gcc/sel-sched.c:3333
0x40000000010bb68f fill_vec_av_set
../../gcc/sel-sched.c:3727
0x40000000010bd45f fill_ready_list
../../gcc/sel-sched.c:4028
0x40000000010bd45f find_best_expr
../../gcc/sel-sched.c:4388
0x40000000010bd45f fill_insns
../../gcc/sel-sched.c:5549
0x40000000010c29cf schedule_on_fences
../../gcc/sel-sched.c:7366
0x40000000010c29cf sel_sched_region_2
../../gcc/sel-sched.c:7504
0x40000000010c510f sel_sched_region_1
../../gcc/sel-sched.c:7546
0x40000000010c700f sel_sched_region(int)
../../gcc/sel-sched.c:7647
0x40000000010c9def run_selective_scheduling()
../../gcc/sel-sched.c:7733
0x40000000019e473f ia64_reorg
../../gcc/config/ia64/ia64.c:9857
0x40000000010314cf execute
../../gcc/reorg.c:3984
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Subject: [Bug bootstrap/84554] make check: FAIL: tversion: ERROR! The versions of gmp.h (5.0.5) and libgmp (4.3.1) do not match.
Date: Mon, 10 Sep 2018 12:54:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That does look like a problem. But why are the mpfr tests running as part of
bootstrap? I don't think they do for me.
I only see tversion built as part of "make check"
>From gcc-bugs-return-614989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 12:54:36 2018
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Subject: [Bug fortran/87270] New: "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Mon, 10 Sep 2018 12:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87270
Bug ID: 87270
Summary: "FINAL" subroutine is called when compiled with
"gfortran -O1", but not "gfortran -O0"
Product: gcc
Version: 8.1.0
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Created attachment 44676
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44676&action=edit
code.f90
Compile and the attached code with gfortran 8.1.0:
> gfortran -O1 code.f90 && ./a.out
main: check 1
create: check 1
create: check 2
main: check 2
cleanup: check 1
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x10e293f3c
#1 0x10e2932e3
#2 0x7fff670f4f59
#3 0x10e28bbe2
#4 0x10e28bddf
#5 0x10e28c6f1
#6 0x10e28c7ad
Segmentation fault: 11
The error does not occur if compiled without "-O1" or with "-O0".
It also works with gfortran 7.3.1
Using "-O0", I get this:
> gfortran -O0 test01.f90 && ./a.out
main: check 1
create: check 1
create: check 2
main: check 2
create: check 1
create: check 2
main: check 3
So, the 'cleanup' function is called with one option, but not the other.
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Subject: [Bug target/84201] 549.fotonik3d_r from SPEC2017 fails verification with -mprefer-vector-width%6 or 512 on Zen
Date: Mon, 10 Sep 2018 13:15:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
If I'm correct it's also problematic on Haswell with -march=native.
Particularly the only affected file is power.fppized.o.
I also tried -mno-fma4 and -mno-fma and it does not help. From the assembly
diff, there is additional vectorization happening.
>From gcc-bugs-return-614991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 13:15:06 2018
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Subject: [Bug target/84201] 549.fotonik3d_r from SPEC2017 fails verification with recent Intel and AMD CPUs
Date: Mon, 10 Sep 2018 13:20:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I see it failing with 4 years old revision r216027 on the Haswell machine.
Looking at portability issues:
https://www.spec.org/cpu2017/Docs/benchmarks/549.fotonik3d_r.html
```
It is perhaps worth mentioning that some calculations generate 'subnormal'
numbers (wikipedia) which may cause slower operation than normal numbers on
some hardware platforms. On such platforms, performance may be improved if
"flush to zero on underflow" (FTZ) is enabled. During SPEC's testing of
Fotonik3d, the output validated correctly whether or not FTZ was enabled.
```
Maybe that's causing the -Ofast issues?
>From gcc-bugs-return-614992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 13:20:10 2018
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Subject: [Bug tree-optimization/87271] New: [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
Date: Mon, 10 Sep 2018 13:28:00 -0000
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Bug ID: 87271
Summary: [9 Regression] ICE in rpo_elim::~rpo_elim
(this=0xbfbfe15c, __in_chrg=<optimized out>) at
../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
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Host: i586-freebsd
That's follow-up of: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00501.html
I see following back-trace:
$ Starting program: /tmp/gcc3/objdir/gcc/cc1 -quiet -I . -I
../../../libbacktrace -I ../../../libbacktrace/../include -I
../../../libbacktrace/../libgcc -I ../libgcc -iprefix
/tmp/gcc3/objdir/gcc/../lib/gcc/i586-unknown-freebsd10.4/9.0.0/ -isystem
/tmp/gcc3/objdir/./gcc/include -isystem /tmp/gcc3/objdir/./gcc/include-fixed -D
HAVE_CONFIG_H -D PIC -isystem /usr/local/i586-unknown-freebsd10.4/include
-isystem /usr/local/i586-unknown-freebsd10.4/sys-include
../../../libbacktrace/elf.c -quiet -dumpbase elf.c -mtune=pentium
-march=pentium -auxbase-strip .libs/elf.o -g -O2 -Wextra -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-Wsuggest-attribute=format -Wcast-qual -Werror -funwind-tables
-frandom-seed=elf.lo -fPIC -o /tmp//ccR4tmV8.s
Program received signal SIGSEGV, Segmentation fault.
0x2a59ebe8 in ?? () from /lib/libc.so.7
(gdb) bt
#0 0x2a59ebe8 in ?? () from /lib/libc.so.7
#1 0x2a59efb7 in ?? () from /lib/libc.so.7
#2 0x2a5aa90c in free () from /lib/libc.so.7
#3 0x085ced17 in va_heap::release<std::pair<int, int> > (v=@0x2b42801c:
0x2aefbf80) at ../../gcc/vec.h:307
#4 0x085ce59f in vec<std::pair<int, int>, va_heap, vl_ptr>::release
(this=0x2b42801c) at ../../gcc/vec.h:1675
#5 0x08ea9523 in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized
out>) at ../../gcc/tree-ssa-sccvn.c:5709
#6 0x08eac4a9 in do_rpo_vn (fn=0x2b1df340, entry=0x2b273b20, exit_bbs=0x0,
iterate=true, eliminate=false) at ../../gcc/tree-ssa-sccvn.c:6303
#7 0x08ea8dab in run_rpo_vn (kind=VN_WALK) at ../../gcc/tree-ssa-sccvn.c:5560
#8 0x08e722e1 in (anonymous namespace)::pass_pre::execute (this=0x2ac5d0c0,
fun=0x2b1df340) at ../../gcc/tree-ssa-pre.c:4199
#9 0x08ad607b in execute_one_pass (pass=0x2ac5d0c0) at ../../gcc/passes.c:2446
#10 0x08ad63b4 in execute_pass_list_1 (pass=0x2ac5d0c0) at
../../gcc/passes.c:2535
#11 0x08ad63e4 in execute_pass_list_1 (pass=0x2ac5b5c0) at
../../gcc/passes.c:2536
#12 0x08ad6430 in execute_pass_list (fn=0x2b1df340, pass=0x2ac5b480) at
../../gcc/passes.c:2546
#13 0x08637115 in cgraph_node::expand (this=0x2b20c320) at
../../gcc/cgraphunit.c:2121
#14 0x086376f0 in expand_all_functions () at ../../gcc/cgraphunit.c:2259
#15 0x08638189 in symbol_table::compile (this=0x2b0070c8) at
../../gcc/cgraphunit.c:2610
#16 0x0863858e in symbol_table::finalize_compilation_unit (this=0x2b0070c8) at
../../gcc/cgraphunit.c:2788
#17 0x08c33ea9 in compile_file () at ../../gcc/toplev.c:480
#18 0x08c36679 in do_compile () at ../../gcc/toplev.c:2170
#19 0x08c3694c in toplev::main (this=0xbfbfe4fe, argc=50, argv=0xbfbfe558) at
../../gcc/toplev.c:2305
#20 0x099dabda in main (argc=50, argv=0xbfbfe558) at ../../gcc/main.c:39
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Subject: [Bug fortran/87270] "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Mon, 10 Sep 2018 13:35:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-10
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This seems to have been fixed by revision r264008 on trunk and r264027 on the
gcc8 branch (pr86328 and pr86760).
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Subject: [Bug bootstrap/87272] New: Infinite loop for incorrect hardware clock
Date: Mon, 10 Sep 2018 13:53:00 -0000
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Bug ID: 87272
Summary: Infinite loop for incorrect hardware clock
Product: gcc
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If the hardware clock is set incorrectly (e.g. to 1970), make will go into an
infinite loop because of the --recheck option in the Makefile.
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Subject: [Bug tree-optimization/87271] [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
Date: Mon, 10 Sep 2018 13:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87271
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-10
CC| |gerald at pfeifer dot com
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
One another back-trace for another reduced test-case:
$ (gdb) bt
#0 0x08519136 in memory_block_pool::allocate () at ../../gcc/memory-block.h:59
#1 0x08519663 in base_pool_allocator<memory_block_pool>::allocate
(this=0xa3facc0 <elt_loc_list_pool>) at ../../gcc/alloc-pool.h:373
#2 0x08659e58 in object_allocator<elt_loc_list>::allocate (this=0xa3facc0
<elt_loc_list_pool>) at ../../gcc/alloc-pool.h:502
#3 0x08652bb9 in new_elt_loc_list (val=0x2addd00c, loc=0x2b2293c0) at
../../gcc/cselib.c:365
#4 0x08656052 in cselib_lookup_1 (x=0x2b2293c0, mode=E_SImode, create=1,
memmode=E_VOIDmode) at ../../gcc/cselib.c:2035
#5 0x08656489 in cselib_lookup (x=0x2b2293c0, mode=E_SImode, create=1,
memmode=E_VOIDmode) at ../../gcc/cselib.c:2141
#6 0x086573ab in cselib_record_sets (insn=0x2b1db8dc) at
../../gcc/cselib.c:2593
#7 0x08657db2 in cselib_process_insn (insn=0x2b1db8dc) at
../../gcc/cselib.c:2790
#8 0x09801c85 in local_cprop_pass () at ../../gcc/cprop.c:1293
#9 0x09802a48 in one_cprop_pass () at ../../gcc/cprop.c:1778
#10 0x09802f3e in execute_rtl_cprop () at ../../gcc/cprop.c:1932
#11 0x09803013 in (anonymous namespace)::pass_rtl_cprop::execute
(this=0x2ac5edc0) at ../../gcc/cprop.c:1970
#12 0x08ad607b in execute_one_pass (pass=0x2ac5edc0) at ../../gcc/passes.c:2446
#13 0x08ad63b4 in execute_pass_list_1 (pass=0x2ac5edc0) at
../../gcc/passes.c:2535
#14 0x08ad63e4 in execute_pass_list_1 (pass=0x2ac5ebc0) at
../../gcc/passes.c:2536
#15 0x08ad6430 in execute_pass_list (fn=0x2b10fc98, pass=0x2ac5b480) at
../../gcc/passes.c:2546
#16 0x08637115 in cgraph_node::expand (this=0x2b0ae898) at
../../gcc/cgraphunit.c:2121
#17 0x086376f0 in expand_all_functions () at ../../gcc/cgraphunit.c:2259
#18 0x08638189 in symbol_table::compile (this=0x2b0070c8) at
../../gcc/cgraphunit.c:2610
#19 0x0863858e in symbol_table::finalize_compilation_unit (this=0x2b0070c8) at
../../gcc/cgraphunit.c:2788
#20 0x08c33ea9 in compile_file () at ../../gcc/toplev.c:480
#21 0x08c36679 in do_compile () at ../../gcc/toplev.c:2170
#22 0x08c3694c in toplev::main (this=0xbfbfea1e, argc=13, argv=0xbfbfea84) at
../../gcc/toplev.c:2305
#23 0x099dabda in main (argc=13, argv=0xbfbfea84) at ../../gcc/main.c:39
$ (gdb) p instance.m_blocks
$1 = (memory_block_pool::block_list *) 0x1
It looks some memory corruption is hapenning.
Gerald, would it be possible to build&run recebt GCC with -fsanitize=address on
the system?
>From gcc-bugs-return-614996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 13:58:50 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
Date: Mon, 10 Sep 2018 14:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87269
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ cat ice2.ii
namespace {
void operator"" a(const char *, unsigned long);
}
inline namespace b {
void operator"" a(unsigned long long );
}
namespace c {
struct d {
using e = bool ;
e f;
};
struct g {
d h;
} ;
template < class > class i {
static const g k;
static bool f();
};
template < class j > bool i< j >::f() {
""a;
} template <> const g i< int >::k {
f};
}
>From gcc-bugs-return-614997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 14:04:42 2018
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Subject: [Bug gcov-profile/85871] g++.dg/gcov/gcov-8.C random failures
Date: Mon, 10 Sep 2018 14:35:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Looks it will be fixed in:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00303.html
>From gcc-bugs-return-614998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 14:35:12 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87273] New: [8/9 Regression] ICE in merge_fences, at sel-sched-ir.c:708
Date: Mon, 10 Sep 2018 16:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87273
Bug ID: 87273
Summary: [8/9 Regression] ICE in merge_fences, at
sel-sched-ir.c:708
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-9.0.0-alpha20180902 snapshot (r264045) ICEs when compiling the following
snippet w/ -march=core2 -Os -fschedule-insns -fsel-sched-pipelining
-fselective-scheduling -fno-ssa-phiopt -fno-tree-loop-im:
int sd;
void
w5 (int n4)
{
long int *vq = (long int *) &n4;
while (n4 < 1)
{
int ks;
ks = !!(n4 + 1) ? ((++sd) == *vq) : 0;
if (ks == 1 / *vq)
*vq *= sd;
}
}
% gcc-9.0.0-alpha20180902 -march=core2 -Os -fschedule-insns
-fsel-sched-pipelining -fselective-scheduling -fno-ssa-phiopt -fno-tree-loop-im
-c mdrdoij6.c
during RTL pass: sched1
mdrdoij6.c: In function 'w5':
mdrdoij6.c:16:1: internal compiler error: in merge_fences, at
sel-sched-ir.c:708
16 | }
| ^
0x64a6f4 merge_fences
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched-ir.c:708
0xc71d8a move_fence_to_fences(_list_node*, flist_tail_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched-ir.c:841
0xc8082b calculate_new_fences
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched.c:7425
0xc8082b sel_sched_region_2
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched.c:7505
0xc81386 sel_sched_region_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched.c:7546
0xc82b66 sel_sched_region(int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched.c:7647
0xc83a81 run_selective_scheduling()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sel-sched.c:7733
0xc6379d rest_of_handle_sched
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sched-rgn.c:3718
0xc6379d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180902/work/gcc-9-20180909/gcc/sched-rgn.c:3828
>From gcc-bugs-return-614999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 16:50:32 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Mon, 10 Sep 2018 17:05:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org,
| |jeremyhu at macports dot org
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jack Howarth from comment #7)
> (In reply to Iain Sandoe from comment #6)
> > We are not dependent on the Xcode supplied tools for some time now, since
> > upstream dsymutil is functional. So, if that were to happen - we would
> > simply (as the Linux folks do) build a complete toolchain rather than just
> > the compiler (i have a 'cctools' look-alike driver for the LLVM backend -
> > and an actual cctools assembler with the known bugs fixed).
> >
>
> While using the assembler from llvm should be straight forward enough,
> assuming Apple didn't push its obsoleting of i386 changes upstream, the
> linker would be a tricker issue since the llvm lld code hasn't been kept up
> on the Darwin side for quite some time.
>
> > To assist this, it would be helpful if fink, macports etc. could file radars
> > noting that the open source releases are very out of date for these
> > components (currently 8.2.1 compared with the released Xcode of 10.x)
>
> I pinged Jeremy to see if he can nudge that along.
cc-ing him on this bug, too
>From gcc-bugs-return-615000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 10 17:05:24 2018
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From: "lopresti at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87274] New: -std=c++11 breaks quadmath macros
Date: Mon, 10 Sep 2018 19:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87274
Bug ID: 87274
Summary: -std=c++11 breaks quadmath macros
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lopresti at gmail dot com
Target Milestone: ---
Test case:
#include <quadmath.h>
__float128 doit()
{
return FLT128_MAX;
}
Compile with "g++ -std=c++11" to get the error:
/tmp/quadmath.cc: In function \u2018__float128 doit()\u2019:
/tmp/quadmath.cc:5:10: error: unable to find numeric literal operator
\u2018operator""Q\u2019
return FLT128_MAX;
^~~~~~~~~~
/tmp/quadmath.cc:5:10: note: use -fext-numeric-literals to enable more built-in
suffixes
Note that my code does not use any quad-precision literals; just the documented
`FLT128_MAX` macro.
I realize quadmath is more a C thing than a C++ thing... But it would still be
nice if this worked, IMO.
On a possibly related note, writing "__extension__" before a quad-precision
literal does not silence this error. Perhaps it should (?)
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
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--- Comment #9 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sat, 8 Sep 2018, iains at gcc dot gnu.org wrote:
> 2. Actually, you get the same failure on GNU-Linux if you try to configure
> defaults on (for example) an x86_64 system without 32bit libs installed (one
> has to add --disable-multilib there, or install 32b libs), so automation is not
> the default on Linux.
The toplevel configure.ac code
# Special user-friendly check for native x86_64-linux build, if
# multilib is not explicitly enabled.
case "$target:$have_compiler:$host:$target:$enable_multilib" in
x86_64-*linux*:yes:$build:$build:)
# Make sure we have a development environment that handles 32-bit
[...]
is meant to give a more helpful error in that case:
AC_MSG_ERROR([I suspect your system does not have 32-bit development
libraries (libc and headers). If you have them, rerun configure with
--enable-multilib. If you do not have them, and want to build a
64-bit-only compiler, rerun configure with --disable-multilib.])
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Subject: [Bug rtl-optimization/85458] FAIL: gcc.dg/pr83480.c (internal compiler error)
Date: Mon, 10 Sep 2018 20:38:00 -0000
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--- Comment #6 from John David Anglin <danglin at gcc dot gnu.org> ---
The patch was approved by Jeff Law.
The ICE indicates that there was a negative priority generated in testcase
on ia64.
Negative priorities present a problem for targets that define
TARGET_SCHED_ADJUST_PRIORITY. For example, the ">>" operator
can't be used to reduce the priority if the current priority is
negative.
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Subject: [Bug tree-optimization/18501] [6/7/8/9 Regression] Missing 'used uninitialized' warning (CCP)
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lvenkatakumarchakka at gmail dot c
| |om
--- Comment #85 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 69578 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/69578] -Wuninitialized not issuing warning.
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CC| |manu at gcc dot gnu.org
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Original report is PR18501.
Comment #4 is PR54554.
*** This bug has been marked as a duplicate of bug 18501 ***
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Subject: [Bug c++/87275] New: unsequenced writes not diagnosed in constant expression
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Bug ID: 87275
Summary: unsequenced writes not diagnosed in constant
expression
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bbi5291 at gmail dot com
Target Milestone: ---
An expression fails to be a constant expression if it contains UB. The code
below contains a function whose evaluation results in UB when called with the
argument `true` because of unsequenced writes to `x`. However, the code
compiles without a diagnostic when said function is called in a context that
requires a constant expression.
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --prefix=/usr/local --disable-multilib
--without-mpc --without-mpfr --without-gmp --without-cloog --without-isl
--enable-languages=c,c++
Thread model: posix
gcc version 8.1.0 (GCC)
$ g++ -std=c++17 -Wall -pedantic main.cpp
$ cat main.cpp
constexpr int f(bool b) {
int x = 0, y = 0;
int& r = b ? x : y;
return (x++) + (r++);
}
template <int x> struct S {};
int main() {
S<f(true)>();
S<f(false)>();
}
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Subject: [Bug middle-end/24639] [meta-bug] bug to track all Wuninitialized issues
Date: Mon, 10 Sep 2018 21:22:00 -0000
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Bug 24639 depends on bug 69578, which changed state.
Bug 69578 Summary: -Wuninitialized not issuing warning.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69578
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/85872] False positive for -Wmaybe-unitialized (compile-time limit)
Date: Mon, 10 Sep 2018 21:26:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-05-22 00:00:00 |2018-9-10
Summary|False positive for |False positive for
|-Wmaybe-unitialized |-Wmaybe-unitialized
| |(compile-time limit)
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Possibly worth playing with:
#define MAX_NUM_CHAINS 8
#define MAX_CHAIN_LEN 5
#define MAX_POSTDOM_CHECK 8
#define MAX_SWITCH_CASES 40
in gcc/tree-ssa-uninit.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Mon, 10 Sep 2018 21:40:00 -0000
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--- Comment #9 from janus at gcc dot gnu.org ---
Author: janus
Date: Mon Sep 10 21:25:33 2018
New Revision: 264196
URL: https://gcc.gnu.org/viewcvs?rev=264196&root=gcc&view=rev
Log:
fix PR 85395
2018-09-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/85395
* decl.c (match_binding_attributes): Use correct default accessibility
for procedure pointer components.
2018-09-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/85395
* gfortran.dg/proc_ptr_comp_52.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/proc_ptr_comp_52.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87275] unsequenced writes not diagnosed in constant expression
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The following doesn't warn either:
int f2(bool b) {
int x = 0;
int& r = x;
return (x++) + (r++);
}
It seems the warning cannot see through references.
>From gcc-bugs-return-615010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 01:17:16 2018
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87276] New: Buggy code with -O2 in trunk revision 264170: MPFR test tstrtofr fails
Date: Tue, 11 Sep 2018 02:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87276
Bug ID: 87276
Summary: Buggy code with -O2 in trunk revision 264170: MPFR
test tstrtofr fails
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
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On Debian x86_64, I get the following failure with
gcc (Debian 20180908-1) 9.0.0 20180908 (experimental) [trunk revision 264170]
This is a regression, as there are no issues with either GCC 8 or with
gcc (Debian 20180822-1) 9.0.0 20180822 (experimental) [trunk revision 263760]
When building the MPFR trunk revision 13165 with
./configure --enable-assert=full CC=gcc-snapshot CFLAGS="-O2"
(no issues with -O or with -O2 -fsanitize=undefined -fno-sanitize-recover), I
get a failure in tstrtofr:
Check overflow failed (2) with:
s=''
x=0
I've modified MPFR's strtofr.c to the following (i.e. adding printf's):
[...]
long read_exp = strtol (str + 1, &endptr, 10);
if (endptr != str+1)
str = endptr;
sum =
read_exp < MPFR_EXP_MIN ? (str = endptr, MPFR_EXP_MIN) :
read_exp > MPFR_EXP_MAX ? (str = endptr, MPFR_EXP_MAX) :
(mpfr_exp_t) read_exp;
printf ("%ld %d\n", sum, res);
printf ("%ld\n", pstr->exp_base);
MPFR_SADD_OVERFLOW (sum, sum, pstr->exp_base,
mpfr_exp_t, mpfr_uexp_t,
MPFR_EXP_MIN, MPFR_EXP_MAX,
res = 2, res = 3);
// printf ("%ld %d\n", sum, res);
[...]
and reduced tstrtofr.c to:
#include "mpfr-test.h"
static void
check_overflow (void)
{
mpfr_t x;
char *s;
mpfr_init (x);
mpfr_strtofr (x, "123456789E9223372036854775807", &s, 0, MPFR_RNDN);
if (s[0] != 0 || !MPFR_IS_INF (x) || !MPFR_IS_POS (x) )
{
printf ("Check overflow failed (2) with:\n s='%s'\n x=", s);
mpfr_dump (x);
exit (1);
}
mpfr_clear (x);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
check_overflow ();
tests_end_mpfr ();
return 0;
}
I get the following failure:
9223372036854775807 1
9
Check overflow failed (2) with:
s=''
x=0
Then, if I uncomment the last printf line, the failure disappears, and I get:
9223372036854775807 1
9
9223372036854775807 2
>From gcc-bugs-return-615013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 02:39:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/43432] Missed vectorization: "complicated access pattern" for increasing and decreasing data indexing
Date: Tue, 11 Sep 2018 02:39:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Eric Gallager from comment #4)
> > (In reply to Michael Matz from comment #3)
> > > Subject: Bug 43432
> > >
> > > Author: matz
> > > Date: Fri Sep 17 13:26:43 2010
> > > New Revision: 164367
> > >
> > > URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164367
> > > Log:
> > > PR tree-optimization/43432
> > > * tree-vect-data-refs.c (vect_analyze_data_ref_access):
> > > Accept backwards consecutive accesses.
> > > (vect_create_data_ref_ptr): If step is negative generate
> > > decreasing IVs.
> > > * tree-vect-stmts.c (vectorizable_store): Reject negative steps.
> > > (perm_mask_for_reverse, reverse_vec_elements): New functions.
> > > (vectorizable_load): Handle loads with negative steps when easily
> > > possible.
> > >
> > > testsuite/
> > > PR tree-optimization/43432
> > > * lib/target-supports.exp (check_effective_target_vect_perm_byte,
> > > check_effective_target_vect_perm_short): New predicates.
> > > (check_effective_target_vect_perm): Include x86_64.
> > > * gcc.dg/vect/pr43432.c: New test.
> > > * gcc.dg/vect/vect-114.c: Adjust.
> > > * gcc.dg/vect/vect-15.c: Ditto.
> > > * gcc.dg/vect/slp-perm-8.c: Use new predicate.
> > > * gcc.dg/vect/slp-perm-9.c: Ditto.
> > >
> > > Added:
> > > trunk/gcc/testsuite/gcc.dg/vect/pr43432.c
> > > Modified:
> > > trunk/gcc/ChangeLog
> > > trunk/gcc/testsuite/ChangeLog
> > > trunk/gcc/testsuite/gcc.dg/vect/slp-perm-8.c
> > > trunk/gcc/testsuite/gcc.dg/vect/slp-perm-9.c
> > > trunk/gcc/testsuite/gcc.dg/vect/vect-114.c
> > > trunk/gcc/testsuite/gcc.dg/vect/vect-15.c
> > > trunk/gcc/testsuite/lib/target-supports.exp
> > > trunk/gcc/tree-vect-data-refs.c
> > > trunk/gcc/tree-vect-stmts.c
> >
> > Did this fix it?
>
> Putting in WAITING on a reply
No reply so I'm going to assume that that fixed it.
>From gcc-bugs-return-615012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 02:39:04 2018
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Subject: [Bug middle-end/45720] [4.6 regression] Revision 164367 miscompiled SPEC CPU 2K
Date: Tue, 11 Sep 2018 02:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45720
Bug 45720 depends on bug 43432, which changed state.
Bug 43432 Summary: Missed vectorization: "complicated access pattern" for increasing and decreasing data indexing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43432
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>From gcc-bugs-return-615011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 02:36:01 2018
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Subject: [Bug other/46828] gengtype is not installed, but become a user [plugins with GTY-s] program
Date: Tue, 11 Sep 2018 02:39:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> Pretty sure gengtype is installed now in newer versions
Yeah I just rechecked and it's installed; I'm going to close this as FIXED.
>From gcc-bugs-return-615014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 02:39:05 2018
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Subject: [Bug tree-optimization/45764] [4.6 Regression] wrong code -O2 vs -O3 (problem in vectorizer???)
Date: Tue, 11 Sep 2018 06:31:00 -0000
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Bug 45764 depends on bug 43432, which changed state.
Bug 43432 Summary: Missed vectorization: "complicated access pattern" for increasing and decreasing data indexing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43432
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Subject: [Bug fortran/87277] New: [8/9 regression] Segfault on using array component of class scalar pointer as an actual argument
Date: Tue, 11 Sep 2018 06:34:00 -0000
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Bug ID: 87277
Summary: [8/9 regression] Segfault on using array component of
class scalar pointer as an actual argument
Product: gcc
Version: 9.0
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Reported by Andrew Baldwin on clf. This segfaults in 8- and 9-branches.
MODULE INTS_TYPE_MODULE
TYPE INTS_TYPE
INTEGER, ALLOCATABLE :: INTS(:)
END TYPE INTS_TYPE
CONTAINS
SUBROUTINE ALLOCATE_INTS_TYPE (IT_OBJ)
CLASS (INTS_TYPE), POINTER, INTENT (OUT) :: IT_OBJ
ALLOCATE (INTS_TYPE :: IT_OBJ)
SELECT TYPE (IT_OBJ)
TYPE IS (INTS_TYPE)
CALL ALLOCATE_ARRAY (IT_OBJ%INTS)
END SELECT
RETURN
END SUBROUTINE ALLOCATE_INTS_TYPE
SUBROUTINE ALLOCATE_ARRAY (ALLOC_ARR)
INTEGER, ALLOCATABLE, INTENT (OUT) :: ALLOC_ARR(:)
INTEGER :: I
ALLOCATE (ALLOC_ARR(4))
DO I = 1, SIZE(ALLOC_ARR)
ALLOC_ARR(I) = I
END DO
RETURN
END SUBROUTINE ALLOCATE_ARRAY
END MODULE INTS_TYPE_MODULE
PROGRAM MFE
USE INTS_TYPE_MODULE
IMPLICIT NONE
CLASS (INTS_TYPE), POINTER :: IT_OBJ
CALL ALLOCATE_INTS_TYPE (IT_OBJ)
END PROGRAM MFE
The fix is regtesting and will be committed tonight as obvious.
Paul
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
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--- Comment #5 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue Sep 11 06:33:39 2018
New Revision: 264201
URL: https://gcc.gnu.org/viewcvs?rev=264201&root=gcc&view=rev
Log:
fix PR 86830
2018-09-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/86830
* expr.c (gfc_is_simply_contiguous): Handle type-bound procedure calls
with non-polymorphic objects.
2018-09-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/86830
* gfortran.dg/typebound_call_30.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/typebound_call_30.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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>From gcc-bugs-return-615018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 07:16:26 2018
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Subject: [Bug rtl-optimization/87273] [8/9 Regression] ICE in merge_fences, at sel-sched-ir.c:708
Date: Tue, 11 Sep 2018 08:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-11
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r247882.
>From gcc-bugs-return-615019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:09:54 2018
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From: "matthew.hambley at metoffice dot gov.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/84554] make check: FAIL: tversion: ERROR! The versions of gmp.h (5.0.5) and libgmp (4.3.1) do not match.
Date: Tue, 11 Sep 2018 08:30:00 -0000
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--- Comment #6 from matthew.hambley at metoffice dot gov.uk ---
> That does look like a problem. But why are the mpfr tests running as part of
> bootstrap? I don't think they do for me.
In which case I think I have misunderstood how the build system works. I
presumed that the dependencies would be tested before they were used. However
you are suggesting that they are not tested until the compiler is tested.
> I only see tversion built as part of "make check"
I have cut "make check install" down to "make install" in my build script and
it does indeed run to completion. Of course now I have an untested compiler
which is a little alarming but it helps identify the source of the problem.
Apologies for the wild goose chase.
>From gcc-bugs-return-615020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:31:07 2018
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Subject: [Bug bootstrap/86615] gcc build failure: auto-host.h error: declaration does not declare anything [-fpermissive]
Date: Tue, 11 Sep 2018 08:31:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Then remove -fpermissive and retry, we cannot support random flags.
*** This bug has been marked as a duplicate of bug 56954 ***
>From gcc-bugs-return-615023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:31:13 2018
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Subject: [Bug bootstrap/56954] Bootstrap failure: ./auto-host.h:1994:16: error: declaration does not declare anything [-fpermissive]
Date: Tue, 11 Sep 2018 08:31:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mdenber at gmx dot com
CC| |bastl at eclipso dot de
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
*** Bug 86615 has been marked as a duplicate of this bug. ***
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
*** Bug 82590 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:31:09 2018
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Subject: [Bug other/82590] auto-host.h error: declaration does not declare anything
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |ebotcazou at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 56954 ***
>From gcc-bugs-return-615022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:31:13 2018
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Subject: [Bug bootstrap/56954] Bootstrap failure: ./auto-host.h:1994:16: error: declaration does not declare anything [-fpermissive]
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mdenber at gmx dot com
CC| |bastl at eclipso dot de
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
*** Bug 86615 has been marked as a duplicate of this bug. ***
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
*** Bug 82590 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:35:54 2018
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Subject: [Bug bootstrap/84554] make check: FAIL: tversion: ERROR! The versions of gmp.h (5.0.5) and libgmp (4.3.1) do not match.
Date: Tue, 11 Sep 2018 08:37:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
So it got way past stage 2 then:
(In reply to matthew.hambley from comment #1)
> It looks like it gets to stage 2 of the bootstrapping process, then it fails
> in
> the MPFR self-test in the way described.
Because it completed the bootstrap successfully, and only failed during
checking.
You should use -k when running make check, so it continues past errors like
this.
>From gcc-bugs-return-615025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:37:22 2018
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Subject: [Bug c++/87275] unsequenced writes not diagnosed in constant expression
Date: Tue, 11 Sep 2018 08:39:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang and EDG also compile it without error.
>From gcc-bugs-return-615026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:39:38 2018
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Subject: [Bug c++/87274] -std=c++11 breaks quadmath macros
Date: Tue, 11 Sep 2018 08:43:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not a bug. If you want to use the non-standard extensions in
<quadmath.h> then either use -std=gnu++11 instead of -std=c++11, or use
-fext-numeric-literals to enable the non-standard suffixes, as suggested.
Using -std=c++11 says you want to disable GNU extensions that conflict with ISO
C++11.
>From gcc-bugs-return-615027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 08:43:23 2018
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Subject: [Bug c++/87274] -std=c++11 breaks quadmath macros
Date: Tue, 11 Sep 2018 09:19:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Patrick J. LoPresti from comment #0)
> Note that my code does not use any quad-precision literals; just the
> documented `FLT128_MAX` macro.
Which is a quad-precision literal, of course.
> I realize quadmath is more a C thing than a C++ thing... But it would still
> be nice if this worked, IMO.
It does work if you use the right options to allow the necessary extensions.
> On a possibly related note, writing "__extension__" before a quad-precision
> literal does not silence this error. Perhaps it should (?)
Yes, maybe. Confirming for that feature request.
>From gcc-bugs-return-615028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 09:19:07 2018
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Subject: [Bug tree-optimization/87259] [9 Regression] ICE: error: definition in block 3 does not dominate use in block 2
Date: Tue, 11 Sep 2018 09:46:00 -0000
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ktkachov at gcc dot gnu.org changed:
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Status|UNCONFIRMED |ASSIGNED
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed. The transformation from r264126 isn't triggered here, but it looks
like the fact that execute_cse_reciprocals_1 didn't get to run on some of the
statements gives the ICE.
Testing a patch
>From gcc-bugs-return-615029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 09:46:13 2018
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Subject: [Bug libstdc++/87278] New: GCC 8 fails to compile make_shared<volatile int>()
Date: Tue, 11 Sep 2018 10:07:00 -0000
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Bug ID: 87278
Summary: GCC 8 fails to compile make_shared<volatile int>()
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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This code compiled in GCC prior to 8.0, but fails to compile in GCC 8.1 and
8.2:
std::make_shared<volatile int>(0)
The error is:
bits/shared_ptr.h: In instantiation of 'std::shared_ptr<_Tp>
std::make_shared(_Args&& ...) [with _Tp = volatile int; _Args = {int}]':
bits/shared_ptr.h:718:45: error: no matching function for call to
'std::allocator<volatile int>::allocator()'
Demo: https://godbolt.org/z/rKy3od
Prior discussion:
https://stackoverflow.com/questions/52268878/gcc-8-fails-to-compile-make-sharedvolatile-int
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Subject: [Bug libstdc++/87278] GCC 8 fails to compile make_shared<volatile int>()
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Olivier Kannengieser <okannen at gmail dot com> changed:
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--- Comment #1 from Olivier Kannengieser <okannen at gmail dot com> ---
This bug appeared after commit 7086d631 "PR libstdc++/48101 improve errors for
invalid container specializations" which invalidated use of standard allocator
of cv qualified type.
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Subject: [Bug tree-optimization/87042] UBSAN: poly-int.h:1095:5: runtime error: signed integer overflow: 9223372036854775807 * 8 cannot be represented in type 'long int'
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I'll fix that later in this stage1.
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Subject: [Bug rtl-optimization/82982] [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82982
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Will, So I'll close this PR now. Please reopen if you can reproduce it again.
Thanks everyone!
>From gcc-bugs-return-615032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 10:27:39 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87279
Bug ID: 87279
Summary: gcc violates §17.1.10
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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All versions of gcc (tested with godbolt) fails to compile the following:
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "test.cpp"
template<class T> void f();
template<class T=int> void f() {}
int main() { f(); }
===========================================================================
Tested (on godbolt) with -std=c++11 , -std=c++14 , -std=c++17 , fails equally
on all.
Tested (on godbolt) with all versions from 4.1 to 8.2 , fails equally on all.
The -save-temps output (above) was generated with gcc 4.9.2
The output of gcc -v is:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.9.2-10+deb8u1'
--with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.9 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-vtable-verify
--enable-plugin --with-system-zlib --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.9.2 (Debian 4.9.2-10+deb8u1)
===========================================================================
Commandline used:
g++ -std=c++11 test.cpp
(not that it matters, it fails regardless of parameters)
The exact error is:
test.cpp: In function ‘int main()’:
test.cpp:4:16: error: no matching function for call to ‘f()’
int main() { f(); }
^
test.cpp:4:16: note: candidate is:
test.cpp:3:28: note: template<class T> void f()
template<class T=int> void f() {}
^
test.cpp:3:28: note: template argument deduction/substitution failed:
test.cpp:4:16: note: couldn't deduce template parameter ‘T’
int main() { f(); }
===========================================================================
It may be noted that neither clang, MSVC nor icc have a problem with the above
code.
According to §17.1.10 the above code should be well defined.
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Subject: [Bug middle-end/82407] [meta-bug] qsort_chk fallout tracking
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Bug 82407 depends on bug 82982, which changed state.
Bug 82982 Summary: [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82982
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WORKSFORME
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Subject: [Bug rtl-optimization/82982] [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
Date: Tue, 11 Sep 2018 11:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82982
--- Comment #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Erm, not Will. Everyone :-)
>From gcc-bugs-return-615036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 11:14:06 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87278] [8/9 Regression] GCC 8 fails to compile make_shared<volatile int>()
Date: Tue, 11 Sep 2018 11:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87278
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-11
Known to work| |7.3.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|GCC 8 fails to compile |[8/9 Regression] GCC 8
|make_shared<volatile int>() |fails to compile
| |make_shared<volatile int>()
Ever confirmed|0 |1
Known to fail| |8.2.0, 9.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
In general the standard committee's library working group is moving further and
further towards a position of "using volatile with the standard library is not
supported".
I'll fix this case though.
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Subject: [Bug tree-optimization/87280] New: [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647
Date: Tue, 11 Sep 2018 11:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87280
Bug ID: 87280
Summary: [9 Regression] ICE in set_ssa_val_to, at
tree-ssa-sccvn.c:3647
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Created attachment 44677
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44677&action=edit
Testcase
gcc-9.0.0-alpha20180909 snapshot (r264185) ICEs when compiling the attached
snippet w/ -O2 (-Os, -O3, -Ofast) --param rpo-vn-max-loop-depth=5:
% gcc-9.0.0-alpha20180909 -O2 --param rpo-vn-max-loop-depth=5 -w -c rilo1emt.c
during GIMPLE pass: fre
rilo1emt.c: In function 'j8':
rilo1emt.c:58:1: internal compiler error: in set_ssa_val_to, at
tree-ssa-sccvn.c:3647
58 | }
| ^
0x699fa5 set_ssa_val_to
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:3647
0xe63d78 visit_phi
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:4261
0xe6435f visit_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:4304
0xe65e89 process_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:5923
0xe671a8 do_rpo_vn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:6454
0xe67f8c execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:6646
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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87281] New: qsort checking ICE in ia64_reorg building libgo
Date: Tue, 11 Sep 2018 11:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87281
Bug ID: 87281
Summary: qsort checking ICE in ia64_reorg building libgo
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jsm28 at gcc dot gnu.org
CC: wilson at tuliptree dot org
Target Milestone: ---
Target: ia64-*-*
Building an all-languages cross compiler for ia64-linux-gnu, trunk r264193, I
see the following ICE building libgo (I don't know how to produce any
equivalent of preprocessed source as a self-contained testcase for Go code, and
I don't know whether this is a regression):
/scratch/jmyers/glibc/many9/src/gcc/libgo/go/bytes/bytes.go: In function
'bytes.genSplit':
/scratch/jmyers/glibc/many9/src/gcc/libgo/go/bytes/bytes.go:211:1: error: qsort
comparator non-negative on sorted output: 2
211 | func genSplit(s, sep []byte, sepSave, n int) [][]byte {
| ^
during RTL pass: mach
/scratch/jmyers/glibc/many9/src/gcc/libgo/go/bytes/bytes.go:211:1: internal
compiler error: qsort checking failed
0x7388f2 qsort_chk_error
/scratch/jmyers/glibc/many9/src/gcc/gcc/vec.c:201
0x7389fc qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
/scratch/jmyers/glibc/many9/src/gcc/gcc/vec.c:244
0x12dbde0 gcc_qsort(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
/scratch/jmyers/glibc/many9/src/gcc/gcc/sort.cc:238
0x11d1b40 ready_sort_real
/scratch/jmyers/glibc/many9/src/gcc/gcc/haifa-sched.c:3089
0x11d95ca schedule_block(basic_block_def**, void*)
/scratch/jmyers/glibc/many9/src/gcc/gcc/haifa-sched.c:6677
0x1256575 schedule_ebb(rtx_insn*, rtx_insn*, bool)
/scratch/jmyers/glibc/many9/src/gcc/gcc/sched-ebb.c:537
0x1256bf4 schedule_ebbs()
/scratch/jmyers/glibc/many9/src/gcc/gcc/sched-ebb.c:657
0xf40cfc ia64_reorg
/scratch/jmyers/glibc/many9/src/gcc/gcc/config/ia64/ia64.c:9859
0xbe42c9 execute
/scratch/jmyers/glibc/many9/src/gcc/gcc/reorg.c:3984
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Makefile:2941: recipe for target 'bytes.lo' failed
make[5]: *** [bytes.lo] Error 1
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Subject: [Bug libstdc++/87278] [8/9 Regression] GCC 8 fails to compile make_shared<volatile int>()
Date: Tue, 11 Sep 2018 11:51:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Sep 11 11:51:10 2018
New Revision: 264208
URL: https://gcc.gnu.org/viewcvs?rev=264208&root=gcc&view=rev
Log:
PR libstdc++/87278 restore support for std::make_shared<volatile T>()
PR libstdc++/87278
* include/bits/shared_ptr.h (make_shared): Use remove_cv instead of
remove_const.
* testsuite/20_util/shared_ptr/creation/87278.cc: New test.
Added:
branches/gcc-8-branch/libstdc++-v3/testsuite/20_util/shared_ptr/creation/87278.cc
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/include/bits/shared_ptr.h
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Subject: [Bug libstdc++/87278] [8/9 Regression] GCC 8 fails to compile make_shared<volatile int>()
Date: Tue, 11 Sep 2018 11:51:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Sep 11 11:50:39 2018
New Revision: 264207
URL: https://gcc.gnu.org/viewcvs?rev=264207&root=gcc&view=rev
Log:
PR libstdc++/87278 restore support for std::make_shared<volatile T>()
PR libstdc++/87278
* include/bits/shared_ptr.h (make_shared): Use remove_cv instead of
remove_const.
* testsuite/20_util/shared_ptr/creation/87278.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/creation/87278.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/shared_ptr.h
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Subject: [Bug libstdc++/87278] [8/9 Regression] GCC 8 fails to compile make_shared<volatile int>()
Date: Tue, 11 Sep 2018 11:54:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 8.3
>From gcc-bugs-return-615042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 11:54:33 2018
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-09-11
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>From gcc-bugs-return-615043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 12:13:20 2018
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Subject: [Bug target/87281] qsort checking ICE in ia64_reorg building libgo
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Probably a dup of the various scheduler related qsort ICEs.
>From gcc-bugs-return-615044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 12:33:52 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/56703] problems with strsignal and maybe strstr due to varying const on return type
Date: Tue, 11 Sep 2018 12:39:00 -0000
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Jay, is the original problem on SunOS still happening?
>
> Rainer, any insight into that build failure? Are some Solaris patches needed?
I don't think so: both in Solaris 10 FCS and in current Solaris 11.4,
<string.h> declares strsignal alike:
extern char *strsignal(int);
And for me, both HAVE_STRSIGNAL and HAVE_DECL_STRSIGNAL are defined as 1
in gcc/auto-host.h.
Jay needs to look at gcc/config.log in more detail to find why the
corresponding autoconf tests fail for him while they work here.
>From gcc-bugs-return-615045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 12:39:20 2018
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87276] Buggy code with -O2 in trunk revision 264170: MPFR test tstrtofr fails
Date: Tue, 11 Sep 2018 14:01:00 -0000
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--- Comment #1 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
I could simplify the code:
#include <stdio.h>
#include <stdlib.h>
struct s { long e; };
static void f (struct s *ps)
{
volatile long m = 9223372036854775807;
const char *str = "11E";
int r;
long sum;
ps->e = 0;
for (;;)
{
if (*str++ != '1')
break;
ps->e ++;
}
r = 1;
sum = m;
printf ("%ld\n", sum);
if (sum >= 0 && ps->e >= 0)
{
unsigned long uc;
uc = (unsigned long) sum + (unsigned long) ps->e;
if (uc > 9223372036854775807)
r = 2;
else
sum = 17;
}
else
sum = sum + ps->e;
printf ("%ld\n", sum);
printf ("%d\n", r);
if (r != 2)
exit (1);
ps->e = sum;
}
int main (void)
{
struct s s;
f (&s);
return 0;
}
$ gcc-snapshot -O2 tst.c -o tst
$ ./tst
9223372036854775807
17
1
zsh: exit 1 ./tst
instead of
9223372036854775807
9223372036854775807
2
>From gcc-bugs-return-615046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 14:01:52 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87242] optimize -O2 incorrect output
Date: Tue, 11 Sep 2018 15:01:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-11
CC| |amonakov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Please either attach a compressed file as indicated by Andrew, or if you want
to minimize the testcase yourself, take a look at tools such as c-reduce or
multidelta.
Also make sure to explain what the problem is, the title of the bug is not
enough.
Note that gcc-5 is no longer supported.
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Subject: [Bug c/66658] missing -Wunused-value negating a function result in a comma expression
Date: Tue, 11 Sep 2018 15:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66658
Michal Malecki <ethouris at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ethouris at gmail dot com
--- Comment #3 from Michal Malecki <ethouris at gmail dot com> ---
Just caught this one, too, something like:
if (x(a, b), c)
{ ... }
Where x is declared as
int x(int a, int b, int c = -1);
There should be at least a warning that "suggested parentheses around the
expression", not necessarily with every case where the "comma operator" is
used.
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Subject: [Bug fortran/87277] [8/9 regression] Segfault on using array component of class scalar pointer as an actual argument
Date: Tue, 11 Sep 2018 16:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87277
--- Comment #1 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Sep 11 15:59:07 2018
New Revision: 264210
URL: https://gcc.gnu.org/viewcvs?rev=264210&root=gcc&view=rev
Log:
2018-09-11 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87277
* expr.c (is_subref_array): Add the check of dimensionality for
class, dummy, pointer arrays.
2018-09-11 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87277
* gfortran.dg/select_type_43.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/select_type_43.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87282] New: Invalid use of 'void', in unevaluated context
Date: Tue, 11 Sep 2018 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87282
Bug ID: 87282
Summary: Invalid use of 'void', in unevaluated context
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: delrieutheo at gmail dot com
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Created attachment 44678
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44678&action=edit
void pointers substraction bug
Hello,
I've been playing around with the detected idiom lately, and I stumbled across
a bug in GCC 8.2.0, when substracting two void* in an unevaluated context.
Adding those two void* works as expected (as shown in the attachment).
The attachment compiles with Clang 5.0.2.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/87283] New: [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
Date: Tue, 11 Sep 2018 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87283
Bug ID: 87283
Summary: [9 Regression] internal compiler error: in remove, at
alloc-pool.h:433
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: ktkachov at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
On x86-64, r264126 caused LTO failure when building 435.gromacs in SPEC
CPU 2006:
gfortran -O2 -ffast-math -fwhole-program -flto=jobserver -fuse-linker-plugin
-DSPEC_CPU_LP64 flincs.o fsettle.fppized.o fshake.o innerf.o flincsd.o
fsettled.fppized.o fshaked.o 3dview.o atomprop.o binio.o block_tx.o bondfree.o
buffer.o calcgrid.o calch.o calcmu.o calcvir.o clincs.o comlib.o confio.o
constr.o copyrite.o coupling.o csettle.o disre.o do_fit.o do_gct.o dummies.o
ebin.o edsam.o enxio.o ewald.o ewald_util.o f77_wrappers.o fatal.o ffscanf.o
fftgrid.o filenm.o fnbf.o force.o futil.o gbutil.o gctio.o genalg.o ghat.o
glaasje.o gmx_system_xdr.o gmxfio.o ifunc.o index.o init.o init_sh.o innerc.o
invblock.o ionize.o libxdrf.o macros.o main.o maths.o matio.o md.o mdatom.o
mdebin.o mdrun.o memdump.o minimize.o mshift.o mvdata.o mvxvf.o names.o
network.o nrama.o nrjac.o nrnb.o ns.o nsb.o nsgrid.o orires.o pargs.o pbc.o
pdbio.o pme.o poisson.o pppm.o princ.o psgather.o pssolve.o psspread.o pull.o
pullinit.o pullio.o pullutil.o rando.o random.o rbin.o rdgroup.o readinp.o
relax_sh.o replace.o rmpbc.o shakef.o shift_util.o sim_util.o smalloc.o
sortwater.o splittop.o stat.o statutil.o strdb.o string2.o symtab.o synclib.o
tables.o tgroup.o tpxio.o trnio.o trxio.o txtdump.o typedefs.o update.o vcm.o
vec.o viewit.o wgms.o wman.o wnblist.o writeps.o xdrd.o xtcio.o xutils.o xvgr.o
-lm -o gromacs
...
during GIMPLE pass: recip
sim_util.c: In function 'do_force.constprop':
sim_util.c:189:6: internal compiler error: in remove, at alloc-pool.h:433
189 | void do_force(FILE *log,t_commrec *cr,t_commrec *mcr,
| ^
0x6776a1 base_pool_allocator<memory_block_pool>::remove(void*)
../../src-trunk/gcc/alloc-pool.h:433
0x6776a1 object_allocator<occurrence>::remove(occurrence*)
../../src-trunk/gcc/alloc-pool.h:521
0x6776a1 free_bb
../../src-trunk/gcc/tree-ssa-math-opts.c:523
0xd265cf execute_cse_reciprocals_1
../../src-trunk/gcc/tree-ssa-math-opts.c:840
0xd2945d execute
../../src-trunk/gcc/tree-ssa-math-opts.c:923
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[4]: *** [/tmp/ccVGmyGV.mk:8: /tmp/gromacs.HLEgaE.ltrans2.ltrans.o] Error 1
make[4]: *** Waiting for unfinished jobs....
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
specmake[3]: *** [gromacs] Error 1
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From: "jorrit at jorrit dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86623] constexpr evaluation fails to give an error for modifying a const object
Date: Tue, 11 Sep 2018 17:18:00 -0000
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Jö <jorrit at jorrit dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jorrit at jorrit dot de
--- Comment #1 from Jö <jorrit at jorrit dot de> ---
This looks like a duplicate of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85125
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/87283] [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
Date: Tue, 11 Sep 2018 17:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87283
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-11
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Breakpoint 1, fancy_abort (
file=0x1fafb28 "/export/gnu/import/git/sources/gcc/gcc/alloc-pool.h",
line=433,
function=0x1fafb88
<base_pool_allocator<memory_block_pool>::remove(void*)::__FUNCTION__> "remove")
at /export/gnu/import/git/sources/gcc/gcc/diagnostic.c:1560
1560 internal_error ("in %s, at %s:%d", function, trim_filename (file),
line);
Missing separate debuginfos, use: dnf debuginfo-install
gmp-6.1.2-7.0.fc28.x86_64 isl-0.16.1-6.0.fc28.x86_64
libmpc-1.0.2-9.0.fc28.x86_64 mpfr-3.1.6-1.fc28.x86_64
zlib-1.2.11-8.1.fc28.x86_64
(gdb) bt
#0 fancy_abort (
file=0x1fafb28 "/export/gnu/import/git/sources/gcc/gcc/alloc-pool.h",
line=433,
function=0x1fafb88
<base_pool_allocator<memory_block_pool>::remove(void*)::__FUNCTION__> "remove")
at /export/gnu/import/git/sources/gcc/gcc/diagnostic.c:1560
#1 0x00000000009858fc in base_pool_allocator<memory_block_pool>::remove (
this=0x2fad900, object=0x2fe88e0)
at /export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:433
#2 0x000000000120cc1f in object_allocator<occurrence>::remove (
this=0x2fad900, object=0x2fe88e0)
at /export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:521
#3 0x0000000001201b98 in free_bb (occ=0x2fe88e0)
at /export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:523
#4 0x0000000001202aea in execute_cse_reciprocals_1 (def_gsi=0x0, def=
<ssa_name 0x7fffead05630>)
at /export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:840
#5 0x0000000001202e1e in (anonymous namespace)::pass_cse_reciprocals::execute
(this=0x2bddb10, fun=0x7fffeace02c0)
at /export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:923
#6 0x0000000000e64ea5 in execute_one_pass (
pass=<opt_pass* 0x2bddb10 "recip"(177)>)
at /export/gnu/import/git/sources/gcc/gcc/passes.c:2446
---Type <return> to continue, or q <return> to quit---
#7 0x0000000000e651f6 in execute_pass_list_1 (
pass=<opt_pass* 0x2bddb10 "recip"(177)>)
at /export/gnu/import/git/sources/gcc/gcc/passes.c:2535
#8 0x0000000000e65227 in execute_pass_list_1 (
pass=<opt_pass* 0x2bdbb00 "*all_optimizations"(-1)>)
at /export/gnu/import/git/sources/gcc/gcc/passes.c:2536
#9 0x0000000000e6527f in execute_pass_list (fn=0x7fffeace02c0, pass=
<opt_pass* 0x2bdb920 "fixup_cfg"(91)>)
at /export/gnu/import/git/sources/gcc/gcc/passes.c:2546
#10 0x000000000096afd2 in cgraph_node::expand (
this=<cgraph_node * const 0x7fffeabfb840 "do_force.constprop"/15485>)
at /export/gnu/import/git/sources/gcc/gcc/cgraphunit.c:2121
#11 0x000000000096b603 in expand_all_functions ()
at /export/gnu/import/git/sources/gcc/gcc/cgraphunit.c:2259
#12 0x000000000096c166 in symbol_table::compile (this=0x7fffeadab100)
at /export/gnu/import/git/sources/gcc/gcc/cgraphunit.c:2610
#13 0x000000000086768b in lto_main ()
at /export/gnu/import/git/sources/gcc/gcc/lto/lto.c:3429
#14 0x0000000000fc63d7 in compile_file ()
at /export/gnu/import/git/sources/gcc/gcc/toplev.c:455
#15 0x0000000000fc8e9b in do_compile ()
at /export/gnu/import/git/sources/gcc/gcc/toplev.c:2170
#16 0x0000000000fc9188 in toplev::main (this=0x7fffffffd45e, argc=25,
---Type <return> to continue, or q <return> to quit---
argv=0x2ba9b00) at /export/gnu/import/git/sources/gcc/gcc/toplev.c:2305
#17 0x0000000001e29162 in main (argc=25, argv=0x7fffffffd558)
at /export/gnu/import/git/sources/gcc/gcc/main.c:39
(gdb) f 1
#1 0x00000000009858fc in base_pool_allocator<memory_block_pool>::remove (
this=0x2fad900, object=0x2fe88e0)
at /export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:433
433 gcc_assert (m_initialized);
(gdb) f 1
#1 0x00000000009858fc in base_pool_allocator<memory_block_pool>::remove (
this=0x2fad900, object=0x2fe88e0)
at /export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:433
433 gcc_assert (m_initialized);
(gdb) p m_initialized
$1 = false
(gdb)
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Subject: [Bug fortran/87277] [8/9 regression] Segfault on using array component of class scalar pointer as an actual argument
Date: Tue, 11 Sep 2018 17:19:00 -0000
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Sep 11 17:18:13 2018
New Revision: 264213
URL: https://gcc.gnu.org/viewcvs?rev=264213&root=gcc&view=rev
Log:
2018-09-11 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87277
* expr.c (is_subref_array): Add the check of dimensionality for
class, dummy, pointer arrays.
2018-09-11 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87277
* gfortran.dg/select_type_43.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/select_type_43.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug lto/87283] [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
Date: Tue, 11 Sep 2018 17:22:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
The patch I'm testing for PR 87259 fixes this as well. Though it may not be an
exact duplicate.
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Subject: [Bug lto/87283] [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
Date: Tue, 11 Sep 2018 17:25:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 44679
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44679&action=edit
A testcase
./lto1 -quiet -dumpdir ./ -dumpbase gromacs.ltrans2 -mtune=generic
-march=x86-64 -mtune=generic -march=x86-64 -auxbase-strip
gromacs.ltrans2.ltrans.o -O2 -O2 -version -fno-openmp -fno-openacc -fno-pie
-ffast-math -fwhole-program -fuse-linker-plugin -fltrans /tmp/gromacs.ltrans2.o
-o gromacs.ltrans2.s
GNU GIMPLE (GCC) version 9.0.0 20180911 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.1 20180726 (Red Hat 8.2.1-1), GMP version
6.1.2, MPFR version 3.1.6-p2, MPC version 1.0.2, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 9.0.0 20180911 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.1 20180726 (Red Hat 8.2.1-1), GMP version
6.1.2, MPFR version 3.1.6-p2, MPC version 1.0.2, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
during GIMPLE pass: recip
sim_util.c: In function ‘do_force.constprop’:
sim_util.c:189:6: internal compiler error: in remove, at alloc-pool.h:433
0x9858fb base_pool_allocator<memory_block_pool>::remove(void*)
/export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:433
0x120cc1e object_allocator<occurrence>::remove(occurrence*)
/export/gnu/import/git/sources/gcc/gcc/alloc-pool.h:521
0x1201b97 free_bb
/export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:523
0x1202ae9 execute_cse_reciprocals_1
/export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:840
0x1202e1d execute
/export/gnu/import/git/sources/gcc/gcc/tree-ssa-math-opts.c:923
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug fortran/87277] [8/9 regression] Segfault on using array component of class scalar pointer as an actual argument
Date: Tue, 11 Sep 2018 17:31:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk and 8-branch.
Paul
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From: "lopresti at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87274] -std=c++11 breaks quadmath macros
Date: Tue, 11 Sep 2018 17:44:00 -0000
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--- Comment #3 from Patrick J. LoPresti <lopresti at gmail dot com> ---
Yes, <quadmath.h> is an extension. But it would be nice, IMO, if it were a
standard-compatible extension.
So this is, as you say, a feature request somehow to enable quad-precision
literals in standard compilation modes. And I admit this was my real motivation
for the bug report in the first place.
Thanks.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Tue, 11 Sep 2018 17:59:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue Sep 11 17:44:04 2018
New Revision: 264214
URL: https://gcc.gnu.org/viewcvs?rev=264214&root=gcc&view=rev
Log:
fix PR 87172
2018-09-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/87172
* resolve.c (resolve_fl_derived): If a type has the 'use_assoc'
attribute, then it was declared in another module, so there should be
no error that it has not been declared.
2018-09-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/87172
* gfortran.dg/iso_c_binding_only_2.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/iso_c_binding_only_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87284] New: [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
Date: Tue, 11 Sep 2018 17:59:00 -0000
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Bug ID: 87284
Summary: [7/8/9 Regression] Allocation of class arrays with
mold results in "conditional jump or move depends on
uninitialised value"
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: fortran
Assignee: pault at gcc dot gnu.org
Reporter: pault at gcc dot gnu.org
Target Milestone: ---
Reported by Andrew Baldwin on clf:
MODULE INTS_TYPE_MODULE
TYPE, ABSTRACT :: BASE_TYPE
END TYPE BASE_TYPE
TYPE, EXTENDS (BASE_TYPE) :: INTS_TYPE
INTEGER, ALLOCATABLE :: INTS(:)
END TYPE INTS_TYPE
CONTAINS
SUBROUTINE MOLD_ALLOCATE (IT_OBJS, MOLD_OBJ)
CLASS (BASE_TYPE), ALLOCATABLE, INTENT (OUT) :: IT_OBJS(:)
CLASS (BASE_TYPE), INTENT (IN) :: MOLD_OBJ
ALLOCATE (IT_OBJS(2), mold = MOLD_OBJ)
RETURN
END SUBROUTINE MOLD_ALLOCATE
END MODULE INTS_TYPE_MODULE
PROGRAM MFE
USE INTS_TYPE_MODULE
IMPLICIT NONE
CLASS (BASE_TYPE), ALLOCATABLE :: IT_OBJS(:)
INTEGER :: I
TYPE (INTS_TYPE) :: MOLD_OBJ
ALLOCATE (INTS_TYPE :: IT_OBJS(2))
SELECT TYPE (IT_OBJS)
TYPE IS (INTS_TYPE)
ALLOCATE (IT_OBJS(1)%INTS(10))
ALLOCATE (IT_OBJS(2)%INTS(10))
END SELECT
DEALLOCATE (IT_OBJS)
CALL MOLD_ALLOCATE (IT_OBJS, MOLD_OBJ)
IF (ALLOCATED(IT_OBJS)) THEN
IF (SIZE(IT_OBJS) .GE. 2) THEN
SELECT TYPE (IT_OBJS)
TYPE IS (INTS_TYPE)
ALLOCATE (IT_OBJS(1)%INTS(10))
ALLOCATE (IT_OBJS(2)%INTS(10))
END SELECT
END IF
END IF
END PROGRAM MFE
It produces the following code for the initialization after the allocation in
'mold_allocate':
{
struct base_type[0:] * restrict D.3905;
integer(kind=8) D.3906;
integer(kind=8) D.3907;
integer(kind=8) D.3908;
struct base_type * D.3909;
D.3905 = (struct base_type[0:] * restrict) it_objs->_data.data;
D.3906 = it_objs->_data.offset;
D.3907 = it_objs->_data.dim[0].lbound;
D.3908 = it_objs->_data.dim[0].ubound;
/* This is OK - init expr for the dynamic type. */
D.3909 = it_objs->_vptr->_def_init;
{
integer(kind=8) S.7;
S.7 = D.3907;
while (1)
{
if (S.7 > D.3908) goto L.11;
/* Copied to elements of the base type!!!! */
it_objs->_vptr->_copy (D.3909, &(*D.3905)[S.7 + D.3906]);
S.7 = S.7 + 1;
}
L.11:;
}
}
A trivial fix regtests OK:
Index: gcc/fortran/trans-expr.c
===================================================================
*** gcc/fortran/trans-expr.c (revision 264209)
--- gcc/fortran/trans-expr.c (working copy)
*************** gfc_trans_class_init_assign (gfc_code *c
*** 1505,1511 ****
gfc_start_block (&block);
lhs = gfc_copy_expr (code->expr1);
- gfc_add_data_component (lhs);
rhs = gfc_copy_expr (code->expr1);
gfc_add_vptr_component (rhs);
--- 1505,1510 ----
*************** gfc_trans_class_init_assign (gfc_code *c
*** 1528,1533 ****
--- 1527,1533 ----
}
else
{
+ gfc_add_data_component (lhs);
sz = gfc_copy_expr (code->expr1);
gfc_add_vptr_component (sz);
gfc_add_size_component (sz);
It will be committed as 'obvious' when I have a moment.
Paul
>From gcc-bugs-return-615060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 17:59:55 2018
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Subject: [Bug middle-end/87237] __atomic_load on 4-byte-sized, 1-byte-aligned struct is not atomic
Date: Tue, 11 Sep 2018 18:50:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
GCC assumes the access is sufficiently aligned for an atomic object of
corresponding type, so either the documentation needs to mention that, or gcc
should stop "upgrading" alignment.
typedef int i1 __attribute__((aligned(1)));
int f(i1 *p)
{
return __atomic_load_n(p, __ATOMIC_RELAXED);
}
We expand the load to (note A32)
(insn 6 3 7 2 (set (reg:SI 87 [ _4 ])
(mem/v:SI (reg/v/f:DI 89 [ p ]) [-1 S4 A32])) ttt.c:5 -1
(nil))
>From gcc-bugs-return-615061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 18:50:03 2018
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Subject: [Bug middle-end/87237] __atomic_load on 4-byte-sized, 1-byte-aligned struct is not atomic
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--- Comment #2 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
(In reply to Alexander Monakov from comment #1)
> GCC assumes the access is sufficiently aligned for an atomic object of
> corresponding type
I think that's only true for objects whose size corresponds to that of a
fundamental type. Consider:
struct B { char c[3]; };
Here, an atomic object of type B (eg, _Atomic(B) or std::atomic<B>) would have
size=4, align=4, and yet GCC treats B as having an alignment of 1 for the
purpose of atomic accesses.
Rather, GCC appears (from its external behavior) to consider only the object
size and not the alignment for atomic accesses, and assumes power-of-2-sized
objects to be aligned to their size (or to the maximum alignment of a
fundamental type, whichever is lower).
There exists code that assumes that GCC behaves as documented in this regard.
For example, libc++'s std::atomic makes this assumption, and as a result,
std::atomic<B> is not atomic when using gcc with libc++. For that reason,
changing GCC to avoid the unwarranted alignment assumption seems superior to me
to updating the documentation to match the behavior. (For what it's worth, I
recently fixed Clang to behave per the GCC documentation in this regard; Clang
used to fall back to a libcall for the underaligned case, but would mistakenly
call the "optimized" library routines that assume the object is sufficiently
aligned.)
>From gcc-bugs-return-615062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 19:31:13 2018
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Subject: [Bug middle-end/87237] __atomic_load on 4-byte-sized, 1-byte-aligned struct is not atomic
Date: Tue, 11 Sep 2018 19:46:00 -0000
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Richard Smith from comment #2)
> I think that's only true for objects whose size corresponds to that of a
> fundamental type. Consider:
>
> struct B { char c[3]; };
>
> Here, an atomic object of type B (eg, _Atomic(B) or std::atomic<B>) would
> have size=4, align=4, and yet GCC treats B as having an alignment of 1 for
> the purpose of atomic accesses.
No, this does not appear to be true. With GCC size/align are 3/1 while with
Clang it's 4/4 as you said:
struct B { char c[3];};
_Atomic struct B b;
int a = _Alignof b;
int s = sizeof b;
s:
.long 3
[...]
a:
.long 1
.comm b,3,1
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Subject: [Bug c++/86946] ice: canonical types differ for identical types
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Still going wrong nearly a month later on revision 264210.
>From gcc-bugs-return-615064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 19:52:56 2018
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Subject: [Bug middle-end/87237] __atomic_load on 4-byte-sized, 1-byte-aligned struct is not atomic
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--- Comment #4 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
(In reply to Alexander Monakov from comment #3)
> With GCC size/align are 3/1 while with Clang it's 4/4 as you said
Oh sorry, you're right, I'd forgotten about this ABI discrepancy. We really
need to get the psABI fixed to say one way or the other! :)
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Subject: [Bug middle-end/87276] Buggy tree-ssa optimization introduced in revision 263875
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Vincent Lefèvre <vincent-gcc at vinc17 dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Buggy code with -O2 in |Buggy tree-ssa optimization
|trunk revision 264170: MPFR |introduced in revision
|test tstrtofr fails |263875
--- Comment #2 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
The bug was introduced in r263875.
>From gcc-bugs-return-615066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 11 21:24:47 2018
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Subject: [Bug middle-end/87276] Buggy tree-ssa optimization introduced in revision 263875
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--- Comment #3 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
Note: This may yield security issues since basically, this makes integer
overflow detection fail. In the testcase, after
unsigned long uc;
uc = (unsigned long) sum + (unsigned long) ps->e;
uc > 9223372036854775807, i.e. uc > LONG_MAX, is regarded as false instead of
true.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug target/87285] New: [9 Regression] ICE: SIGSEGV in tree_class_check (tree.h:3235) with -O2 -std=gnu++11
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87285
Bug ID: 87285
Summary: [9 Regression] ICE: SIGSEGV in tree_class_check
(tree.h:3235) with -O2 -std=gnu++11
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: mipsel-unknown-linux-gnu
Build: x86_64-pc-linux-gnu
Created attachment 44680
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44680&action=edit
reduced testcase (from compatibility-c++0x.cc)
Compiler output:
$ cc1plus -O2 -std=gnu++11 testcase.C
virtual a b::c() const constexpr b::b(b&&) constexpr b::b(b&&) constexpr
b::b(b&&)
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>during
GIMPLE pass: fnsplit
testcase.C: In function 'virtual a b::c() const':
testcase.C:13:1: internal compiler error: Segmentation fault
13 | }
| ^
0xe0747f crash_signal
/repo/gcc-trunk/gcc/toplev.c:325
0x10c9acc tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/repo/gcc-trunk/gcc/tree.h:3235
0x10c9acc decl_function_context(tree_node const*)
/repo/gcc-trunk/gcc/tree.c:8994
0x116d247 mips_get_compress_mode
/repo/gcc-trunk/gcc/config/mips/mips.c:1355
0x116e388 mips_set_current_function
/repo/gcc-trunk/gcc/config/mips/mips.c:19636
0xa9939b invoke_set_current_function_hook
/repo/gcc-trunk/gcc/function.c:4616
0xaa392b invoke_set_current_function_hook
/repo/gcc-trunk/gcc/function.c:4600
0xaa392b allocate_struct_function(tree_node*, bool)
/repo/gcc-trunk/gcc/function.c:4729
0xe9c6af initialize_cfun
/repo/gcc-trunk/gcc/tree-inline.c:2452
0xe9c6af tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, bool, bitmap_head*, bool, bitmap_head*, basic_block_def*)
/repo/gcc-trunk/gcc/tree-inline.c:5832
0x937b3a cgraph_node::create_version_clone_with_body(vec<cgraph_edge*, va_heap,
vl_ptr>, vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, bool,
bitmap_head*, basic_block_def*, char const*)
/repo/gcc-trunk/gcc/cgraphclones.c:983
0x1598d0d split_function
/repo/gcc-trunk/gcc/ipa-split.c:1327
0x159cea8 execute_split_functions
/repo/gcc-trunk/gcc/ipa-split.c:1825
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
I am failing to finish build due to this ICE.
$ xgcc -v
Using built-in specs.
COLLECT_GCC=/repo/build-trunk-264226-checking-yes-rtl-df-extra-mipsel/gcc/xgcc
Target: mipsel-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-sysroot=/usr/mipsel-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=mipsel-unknown-linux-gnu
--with-ld=/usr/bin/mipsel-unknown-linux-gnu-ld
--with-as=/usr/bin/mipsel-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-264226-checking-yes-rtl-df-extra-mipsel
Thread model: posix
gcc version 9.0.0 20180912 (experimental) (GCC)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87273] [8/9 Regression] ICE in merge_fences, at sel-sched-ir.c:708
Date: Wed, 12 Sep 2018 07:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87273
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Version|unknown |8.2.1
Target Milestone|--- |8.3
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87276] [9 Regression] Buggy tree-ssa optimization introduced in revision 263875
Date: Wed, 12 Sep 2018 08:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87276
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-12
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|Buggy tree-ssa optimization |[9 Regression] Buggy
|introduced in revision |tree-ssa optimization
|263875 |introduced in revision
| |263875
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-615071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:03:58 2018
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 12 Sep 2018 08:07:00 -0000
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--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to dave.anglin from comment #21)
> On 2018-09-09 2:46 PM, rguenther at suse dot de wrote:
> > In the last patch you replace arg0 || arg1 with arg0 & & arg1, that looks
> > wrong. Otherwise the patch looks OK.
> It was intentional. See the comment in dojump.c:
>
> Â /* If function pointers need to be "canonicalized" before they can
> Â Â Â Â be reliably compared, then canonicalize them.
> Â Â Â Â Only do this if *both* sides of the comparison are function pointers.
>     If one side isn't, we want a noncanonicalized comparison. See PR
>     middle-end/17564. */
> Â if (targetm.have_canonicalize_funcptr_for_compare ()
> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop0))
> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop1))
> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0)))
> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop1))))
>
> Based on this, I thought that we could allow do_store_flag to output a
> "scc" instruction
> when both sides weren't function or method pointers.
Ah, I see.
> I just looked at the testcase for middle-end/17564. I think we also
> have to handle
> pointers to void types. Looks like fix for 17564 was wrong...
>
> I also missed updating a similar bit of code in match.pd with
> POINTER_TYPE_P and
> FUNC_OR_METHOD_TYPE_P.
>
> I'm not 100% certain about the need for the code in fold-const.c and
> match.pd.
Well, for consistency we probably want them.
> Dave
>From gcc-bugs-return-615072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:07:14 2018
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Subject: [Bug c++/87282] Invalid use of 'void', in unevaluated context
Date: Wed, 12 Sep 2018 08:17:00 -0000
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--- Comment #1 from delrieutheo at gmail dot com ---
Note that it fails with operator-=(void*, void*) as well.
>From gcc-bugs-return-615073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:17:51 2018
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Subject: [Bug tree-optimization/87245] [missed optimization] switching on indices of struct members
Date: Wed, 12 Sep 2018 08:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-12
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Possibly the same as
if (i == 0)
return a[0];
return a[i];
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Subject: [Bug ada/86916] Constraint_Error erroneous memory access instead of error
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-apple-darwin15 |
Status|UNCONFIRMED |NEW
Keywords| |accepts-invalid
Last reconfirmed| |2018-09-12
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
Summary|8.1.0 |Constraint_Error erroneous
|(x86_64-apple-darwin15) |memory access instead of
|Constraint_Error erroneous |error
|memory access |
Target Milestone|--- |9.0
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed. This gives an assertion failure on mainline:
+===========================GNAT BUG DETECTED==============================+
| 9.0.0 20180911 (experimental) [trunk revision 264202] (x86_64-suse-linux) |
| Assert_Failure elists.adb:220 |
| Error detected at animation.adb:61:16
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Subject: [Bug rtl-optimization/87246] [6/7/8/9 Regression] ICE in decompose_normal_address, at rtlanal.c:6379
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Version|unknown |8.2.1
Target Milestone|--- |6.5
>From gcc-bugs-return-615076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:28:50 2018
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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
Date: Wed, 12 Sep 2018 08:30:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> For the above case, there are during the recursion 77608 synth_mult calls,
> which might be ok, so indeed better hashing would help, but 10311 is too
> large and is not a prime number. Plus this hash table is resolving all
> collisions by evicting older cash entries.
> That is perhaps fine for the toplevel synth_mult calls, but for the
> recursive ones I guess we want to make sure we cache all the values needed
> to compute the same toplevel call and perhaps only record the toplevel
> call's entry if it would need to evict older entries.
> So maybe use the current hash table + another temporary hash_map live just
> during the outermost synth_mult call (and activate this behavior only if say
> seeing a recursion count of 16)?
Sounds reasonable - I'd try activating the behavior on the first collision?
>From gcc-bugs-return-615077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:31:02 2018
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Subject: [Bug go/87260] [8/9 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Wed, 12 Sep 2018 08:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |8.3
Summary|[8 Regression] go fails to |[8/9 Regression] go fails
|build a simple program on |to build a simple program
|arm-linux-gnueabihf |on arm-linux-gnueabihf
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Subject: [Bug tree-optimization/87263] [9 Regression] ICE on valid code at -O1: verify_ssa failed
Date: Wed, 12 Sep 2018 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug tree-optimization/87267] [9 Regression] ICE: Segmentation fault (in gimple_truth_valued_p)
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine...
>From gcc-bugs-return-615081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:36:55 2018
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Subject: [Bug middle-end/87268] Missed optimization for a tailcall
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So works as expected on valid input.
>From gcc-bugs-return-615082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 08:51:13 2018
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Subject: [Bug tree-optimization/87271] [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I wonder if there's a way to trace all malloc/realloc/free calls as well
(possibly simply via breakpoints and doing continue in their commands, logging
the result).
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Subject: [Bug fortran/87284] [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
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Subject: [Bug tree-optimization/87280] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87280
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-12
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug target/87285] [9 Regression] ICE: SIGSEGV in tree_class_check (tree.h:3235) with -O2 -std=gnu++11
Date: Wed, 12 Sep 2018 09:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87285
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-615086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 09:11:26 2018
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/87260] [8/9 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Wed, 12 Sep 2018 09:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87260
--- Comment #2 from Matthias Klose <doko at debian dot org> ---
the patch fixes the issue.
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782
Date: Wed, 12 Sep 2018 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87172
janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #5 from janus at gcc dot gnu.org ---
Fixed with r264214. Closing.
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Subject: [Bug middle-end/87248] [6/7/8/9 Regression] Bad code for masked operations involving signed ints
Date: Wed, 12 Sep 2018 09:21:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 12 09:18:55 2018
New Revision: 264230
URL: https://gcc.gnu.org/viewcvs?rev=264230&root=gcc&view=rev
Log:
PR middle-end/87248
* fold-const.c (fold_ternary_loc) <case COND_EXPR>: Verify also that
BIT_AND_EXPR's second operand is a power of two. Formatting fix.
* c-c++-common/torture/pr87248.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/torture/pr87248.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/87248] [6/7/8/9 Regression] Bad code for masked operations involving signed ints
Date: Wed, 12 Sep 2018 09:25:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 12 09:21:03 2018
New Revision: 264231
URL: https://gcc.gnu.org/viewcvs?rev=264231&root=gcc&view=rev
Log:
PR middle-end/87248
* fold-const.c (fold_ternary_loc) <case COND_EXPR>: Verify also that
BIT_AND_EXPR's second operand is a power of two. Formatting fix.
* c-c++-common/torture/pr87248.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/c-c++-common/torture/pr87248.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/86844] [8/9 regression] wrong code caused by store merging pass
Date: Wed, 12 Sep 2018 10:12:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 12 09:25:07 2018
New Revision: 264232
URL: https://gcc.gnu.org/viewcvs?rev=264232&root=gcc&view=rev
Log:
PR tree-optimization/86844
* gimple-ssa-store-merging.c
(imm_store_chain_info::coalesce_immediate): For overlapping stores, if
there are any overlapping stores in between them, make sure they are
also coalesced or we give up completely.
* gcc.c-torture/execute/pr86844.c: New test.
* gcc.dg/store_merging_22.c: New test.
* gcc.dg/store_merging_23.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr86844.c
trunk/gcc/testsuite/gcc.dg/store_merging_22.c
trunk/gcc/testsuite/gcc.dg/store_merging_23.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug gcov-profile/85871] g++.dg/gcov/gcov-8.C random failures
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Should be fixed in r264202. Please reopen if still present.
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Jakub: PING^2
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Subject: [Bug middle-end/86078] Documentation: missing param default values
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that there are also params that have completely missing documentation:
indir-call-topn-profile
unlikely-bb-count-fraction
>From gcc-bugs-return-615094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 10:50:25 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
Date: Wed, 12 Sep 2018 11:09:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, can't we somewhere in:
/* Find best representative of the partition.
Prefer those with DECL_NAME, even better
satisfying asan_protect_stack_decl predicate. */
for (j = i; j != EOC; j = stack_vars[j].next)
if (asan_protect_stack_decl (stack_vars[j].decl)
&& DECL_NAME (stack_vars[j].decl))
{
repr_decl = stack_vars[j].decl;
break;
}
else if (repr_decl == NULL_TREE
&& DECL_P (stack_vars[j].decl)
&& DECL_NAME (stack_vars[j].decl))
repr_decl = stack_vars[j].decl;
if (repr_decl == NULL_TREE)
repr_decl = stack_vars[i].decl;
data->asan_decl_vec.safe_push (repr_decl);
code tell the asan.c code about the whole partition, essentially
after picking up the representative, essentially do:
if (asan_handled_variables
&& !asan_handled_variables->contains (repr_decl))
{
for (j = i; j != EOC; j = stack_vars[j].next)
if (asan_handled_variables->contains (stack_vars[j].decl))
break;
if (j != EOC)
asan_handled_variables->add (repr_decl);
}
, i.e. if any variable in the partition was ever poisoned, make sure the
representative is unpoisoned?
Of course, asan_handled_variables is private to asan.c and EOC and the way the
vars are chained is cfgexpand.c's private thing, so it might need some wrapping
into asan.c APIs that cfgexpand.c can call.
>From gcc-bugs-return-615095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 11:09:17 2018
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87286] New: ICE on vectors of enums
Date: Wed, 12 Sep 2018 11:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87286
Bug ID: 87286
Summary: ICE on vectors of enums
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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This testcase:
enum foo { F };
typedef enum foo vec_foo __attribute__((vector_size (16)));
vec_foo add (vec_foo x, vec_foo y) { return x + y; }
triggers:
internal compiler error: in vector_types_compatible_elements_p
This seems to be a disagreement between handle_vector_size_attribute (which
accepts INTEGRAL_TYPE_Ps except BOOLEAN_TYPE) and
vector_types_compatible_elements_p (which uses INTEGER_TYPE instead of
INTEGRAL_TYPE_P). Not sure whether the intent was to forbid vectors of enums,
so not sure whether this is ice-on-valid or ice-on-invalid.
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Subject: [Bug tree-optimization/87267] [9 Regression] ICE: Segmentation fault (in gimple_truth_valued_p)
Date: Wed, 12 Sep 2018 11:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Same issue as PR87266.
*** This bug has been marked as a duplicate of bug 87266 ***
>From gcc-bugs-return-615097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 11:19:23 2018
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Subject: [Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
Date: Wed, 12 Sep 2018 11:31:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87267 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 11:31:06 2018
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Subject: [Bug tree-optimization/87280] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647
Date: Wed, 12 Sep 2018 11:54:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Here we're running into the not executable but limited region where we marked
not only backedges as executable but also destination BBs as reachable. Things
go
downhill here because we end up with with all sorts of weird state this way.
So this is related to (and probably caused by) r264057 and PR87169.
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Subject: [Bug tree-optimization/87271] [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
You mean like mtrace in glibc?
Another option is try valgrind.
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Subject: [Bug tree-optimization/87271] [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 12 Sep 2018, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87271
>
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |jakub at gcc dot gnu.org
>
> --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> You mean like mtrace in glibc?
> Another option is try valgrind.
Yeah, it's said to not work on freebsd. valgrind seems clean on
trunk x86_64-linux and I think that means everything is OK there...
I've just verified hash-map construction works as desired.
I wonder if side-stepping the small-object allocators by changing
the reserve_exact (2) to say reserve_exact (16) would change things...
That is, I'm absolutely not ruling out an allocator issue
(try tcmalloc?!)
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Subject: [Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
Date: Wed, 12 Sep 2018 12:15:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-615102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 12:15:04 2018
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Subject: [Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)
Date: Wed, 12 Sep 2018 12:31:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 12 12:14:27 2018
New Revision: 264237
URL: https://gcc.gnu.org/viewcvs?rev=264237&root=gcc&view=rev
Log:
2018-09-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/87266
* tree-ssa-sccvn.c (do_rpo_vn): Always iterate to not yet
visited blocks.
* gcc.dg/torture/pr87266-1.c: New testcase.
* gcc.dg/torture/pr87266-2.c: Likewise.
* gcc.dg/torture/pr87266-3.c: Likewise.
* gcc.dg/torture/pr87266-4.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87266-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr87266-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr87266-3.c
trunk/gcc/testsuite/gcc.dg/torture/pr87266-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-615103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 12:31:45 2018
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Subject: [Bug ada/87058] FAIL: gnat.dg/slice7.adb (test for excess errors)
Date: Wed, 12 Sep 2018 12:36:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I cannot reproduce:
=== gnat Summary ===
# of expected passes 2707
# of expected failures 24
# of unsupported tests 3
/home/eric/build/gcc-8-branch/native/gcc/gnatmake version 8.2.1 20180912
[gcc-8-branch revision 264232]
eric@polaris:~/build/gcc-8-branch/native> gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=gcc/xgcc
Target: x86_64-suse-linux
Configured with: /home/eric/svn/gcc-8-branch/configure
--build=x86_64-suse-linux --prefix=/home/eric/install/gcc-8-branch
--enable-languages=all --enable-__cxa_atexit --disable-nls
--enable-checking=yes
Thread model: posix
gcc version 8.2.1 20180912 [gcc-8-branch revision 264232] (GCC)
>From gcc-bugs-return-615104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 12:36:38 2018
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Subject: [Bug tree-optimization/87263] [9 Regression] ICE on valid code at -O1: verify_ssa failed
Date: Wed, 12 Sep 2018 12:49:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is because dominated_by_p_w_unex called by rpo_elim::eliminate_avail is
looking at edges we have not yet processed. This might be also an issue when
iterating because we may "leak" previous iteration state into the current
iteration and may end up failing to iterate.
>From gcc-bugs-return-615105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 12:49:13 2018
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Subject: [Bug middle-end/87276] [9 Regression] Buggy tree-ssa optimization introduced in revision 263875
Date: Wed, 12 Sep 2018 12:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is really a duplicate of PR86554. We're performing code-hoisting on
sum + ps->e in the following bit:
if (sum >= 0 && ps->e >= 0)
{
unsigned long uc;
uc = (unsigned long) sum + (unsigned long) ps->e;
if (uc > 9223372036854775807)
r = 2;
else
sum = 17;
}
else
sum = sum + ps->e;
Inserting expression in block 5 for code hoisting: {plus_expr,_8,sum_9} (0008)
Inserted _36 = _8 + sum_9;
in predecessor 5 (0008)
because at some point I teached value-numbering that the two expressions
compute the same value and GCC transforms if (uc > 9223372036854775807)
to if ((signed long)uc < 0).
The testcase works correctly with -fno-code-hoisting. Not sure why the
cited rev. triggers it but as seen with the other PR the underlying issue
(hoisting an expression with undefined behavior) is latent. After
code-hoisting
later VRP pass will optimize the compare (as expected), so -fno-tree-vrp also
is a workaround.
*** This bug has been marked as a duplicate of bug 86554 ***
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Subject: [Bug middle-end/86554] [7/8/9 Regression] Incorrect code generation with signed/unsigned comparison
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |vincent-gcc at vinc17 dot net
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87276 has been marked as a duplicate of this bug. ***
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I have random SIGBUS errors on SPARC/Solaris 10 and 11 machines.
>From gcc-bugs-return-615108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 13:18:37 2018
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 12 Sep 2018 13:22:00 -0000
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--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #13)
> I have random SIGBUS errors on SPARC/Solaris 10 and 11 machines.
Could you please run compiler in valgrind?
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 12 Sep 2018 13:24:00 -0000
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--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Could you please run compiler in valgrind?
On SPARC/Solaris?
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 12 Sep 2018 13:42:00 -0000
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #15)
> > Could you please run compiler in valgrind?
>
> On SPARC/Solaris?
Yes please, on an arbitrary input you see the segbus/segfault.
>From gcc-bugs-return-615111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 13:42:16 2018
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Wed, 12 Sep 2018 13:44:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> -fstack-check produces the code (x86_64; similar for 32-bit):
>
> foo:
> subq $4152, %rsp
> orq $0, (%rsp)
> addq $4128, %rsp
> leaq 6(%rsp), %rdi
> call bar
> addq $24, %rsp
> ret
>
> This test:
> 1. Unnecessarily touches an extra page of stack that's not used, wasting
> memory.
It's as designed (the extra page is necessary to unwind the stack).
> 2. Skips over a whole page, potentially clobbering (data race) data on the
> other side of a guard page.
Likewise, because of 1.
> 3. Is completely unnecessary; since less than a page of stack is needed,
> only a probe of the final desired stack pointer (after the third
> instruction) is needed, and it's performed implicitly by the call.
Likewise, because of 1.
> The excessive stack usage, unsafety (jumping the guard page), and size and
> potential performance hit from unnecessary checks seem to make -fstack-check
> unsuitable for its intended purpose at this time.
-fstack-check was designed to implement stack checking in Ada, it has nothing
to do with stack protection, you want to use -fstack-clash-protection instead.
>From gcc-bugs-return-615112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 13:44:43 2018
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From: "minshall at acm dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87242] optimize -O2 incorrect output
Date: Wed, 12 Sep 2018 13:55:00 -0000
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--- Comment #4 from Greg Minshall <minshall at acm dot org> ---
hi. sorry for the delay. i'm creduce'ing and will upload.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87280] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647
Date: Wed, 12 Sep 2018 14:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 12 Sep 2018 14:03:00 -0000
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--- Comment #17 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> > On SPARC/Solaris?
>
> Yes please, on an arbitrary input you see the segbus/segfault.
It was a rhetorical question, there is no valgrind on this platform... But
I'll debug the issue at some point, no worries.
>From gcc-bugs-return-615115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 14:03:49 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Wed, 12 Sep 2018 14:04:00 -0000
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--- Comment #18 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #17 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
>> > On SPARC/Solaris?
>>
>> Yes please, on an arbitrary input you see the segbus/segfault.
>
> It was a rhetorical question, there is no valgrind on this platform... But
> I'll debug the issue at some point, no worries.
Even on Solaris 11/x86, where the latest valgrind release (or the git
version) is supposed to be supported, I get only failures when running
make regtest.
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Subject: [Bug tree-optimization/87280] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647
Date: Wed, 12 Sep 2018 14:31:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 12 14:03:21 2018
New Revision: 264241
URL: https://gcc.gnu.org/viewcvs?rev=264241&root=gcc&view=rev
Log:
2018-09-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/87280
* tree-ssa-sccvn.c (process_bb): Handle the case of executable
edge but unreachable target.
(do_rpo_vn): For conservatively handling a PHI only mark
the backedge executable but not the block reachable.
* gcc.dg/torture/pr87280.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87280.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87287] New: Move signed (x % pow2) == 0 optimization to gimple
Date: Wed, 12 Sep 2018 14:32:00 -0000
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Bug ID: 87287
Summary: Move signed (x % pow2) == 0 optimization to gimple
Product: gcc
Version: 9.0
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As can be seen on:
void f0 (void);
int
f1 (int x)
{
return x % 16 == 0;
}
int
f2 (int x)
{
int y = x % 16;
return y != 0;
}
void
f3 (int x)
{
if (x % 16 != 0)
f0 ();
}
void
f4 (int x)
{
int y = x % 16;
if (y == 0)
f0 ();
}
we perform this optimization in fold-const.c only, it should be moved to
match.pd.
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Subject: [Bug tree-optimization/87287] Move signed (x % pow2) == 0 optimization to gimple
Date: Wed, 12 Sep 2018 14:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-12
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Ever confirmed|0 |1
>From gcc-bugs-return-615119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 14:34:04 2018
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Subject: [Bug tree-optimization/87287] Move signed (x % pow2) == 0 optimization to gimple
Date: Wed, 12 Sep 2018 14:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87287
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With the to be posted patch, f1 and f3 remains the same, f2 and f4 improves:
- movl %edi, %eax
- sarl $31, %eax
- shrl $28, %eax
- addl %eax, %edi
+ xorl %eax, %eax
andl $15, %edi
- cmpl %eax, %edi
setne %al
- movzbl %al, %eax
for f2 and
- movl %edi, %eax
- sarl $31, %eax
- shrl $28, %eax
- addl %eax, %edi
andl $15, %edi
- cmpl %eax, %edi
je .L9
for f4 at -O2.
>From gcc-bugs-return-615120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 14:47:13 2018
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Subject: [Bug tree-optimization/87287] Move signed (x % pow2) == 0 optimization to gimple
Date: Wed, 12 Sep 2018 14:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87287
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44681
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44681&action=edit
gcc9-pr87287.patch
Untested fix.
>From gcc-bugs-return-615121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 14:47:31 2018
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From: "jorrit at jorrit dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87288] New: Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Wed, 12 Sep 2018 15:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87288
Bug ID: 87288
Summary: Segfault after const_cast with "-O2
-ftree-loop-vectorize" but _without_ "-mavx"
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jorrit at jorrit dot de
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Created attachment 44682
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44682&action=edit
Test case
The attached test case segfaults when compiled as
/usr/bin/g++-8 -O2 -ftree-loop-vectorize -o test-cornerstoragerefwrap-fail
test.ii
It exits successfully when compiled with either
/usr/bin/g++-8 -O2 -ftree-loop-vectorize -mavx -o
test-cornerstoragerefwrap-pass test.ii
/usr/bin/g++-8 -O2 -o test-cornerstoragerefwrap-pass test.ii
The const_cast in the test case came out of std::array (in the _S_ref() that is
called by operator[]).
The segfault occurs with
- g++-8 (Debian 8.2.0-4) 8.2.0 from Debian buster
(registry.dune-project.org/docker/ci/debian:10)
- g++ (GCC) 8.1.0 from Coliru (except that I can't test -mavx there), see
http://coliru.stacked-crooked.com/a/43b736434d1b2e15
The segfault does not occur with
- g++ (GCC) 7.3.0 from gcc:7.3.0 on hub.docker.com
- g++ (Debian 6.3.0-18+deb9u1) 6.3.0 20170516 from Debian stretch
This was reduced from test-cornerstoragerefwrap.cc in dune-geometry. The issue
seemed to start when the CI system upgraded from g++ 8.1 to 8.2, though the
fact that that 8.1.0 above also produces the segfault makes me doubt that the
reduced issue and the original issue are the same. Ref
https://gitlab.dune-project.org/core/dune-geometry/issues/19 (maybe next week
when that bugtracker is operational again)
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87288] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Wed, 12 Sep 2018 15:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |NEW
Keywords| |wrong-code
Last reconfirmed| |2018-09-12
Component|tree-optimization |target
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on trunk.
0x0000000000400508 <+56>: movupd (%rax,%rdx,2),%xmm0
0x000000000040050d <+61>: movhpd 0x10(%rax,%rdx,2),%xmm0
=> 0x0000000000400513 <+67>: movaps %xmm0,(%rsp,%rdx,1)
0x0000000000400517 <+71>: add $0x10,%rdx
0x000000000040051b <+75>: cmp %rdx,%rcx
0x000000000040051e <+78>: jne 0x400508 <main(int, char**)+56>
and
base_address: &jacobianTransposeds
offset from base address: 0
constant offset from base address: 0
step: 8
base alignment: 16
base misalignment: 0
offset alignment: 128
step alignment: 8
base_object: MEM[(double &)&jacobianTransposeds]
Access function 0: {0B, +, 8}_1
not sure where that offset 1 comes from... (also movaps vs. movapd, but ...).
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87288] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Wed, 12 Sep 2018 15:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-ivopts also avoids the issue but still generates aligned accesses:
400510: 66 0f 10 02 movupd (%rdx),%xmm0
400514: 83 c6 01 add $0x1,%esi
400517: 48 83 c2 20 add $0x20,%rdx
40051b: 48 83 c1 10 add $0x10,%rcx
40051f: 66 0f 16 42 f0 movhpd -0x10(%rdx),%xmm0
400524: 0f 29 41 f0 movaps %xmm0,-0x10(%rcx)
400528: 41 39 f0 cmp %esi,%r8d
40052b: 77 e3 ja 400510 <main+0x40>
Oh, the issue is bogus iteration... in the original cited assembly
we start with rdx == rcx == 0 and thus iterate until overflow.
IVOPTs does
- MEM[(double &)vectp_jacobianTransposeds.15_51] = vect_perm_even_49;
- vectp.11_45 = vectp.11_47 + 16;
- vectp_jacobianTransposeds.15_52 = vectp_jacobianTransposeds.15_51 + 16;
- ivtmp_55 = ivtmp_54 + 1;
- if (ivtmp_55 >= bnd.8_41)
+ MEM[symbol: jacobianTransposeds, index: ivtmp.23_27, offset: 0] =
vect_perm_even_49;
+ ivtmp.23_26 = ivtmp.23_27 + 16;
+ if (ivtmp.23_26 == _19)
the >= -> == transform looks wrong. Bin?
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From: "jules at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86336] [9 regression] ICE in omp-low.c:7879
Date: Wed, 12 Sep 2018 15:32:00 -0000
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--- Comment #3 from jules at gcc dot gnu.org ---
Author: jules
Date: Wed Sep 12 15:21:19 2018
New Revision: 264244
URL: https://gcc.gnu.org/viewcvs?rev=264244&root=gcc&view=rev
Log:
[OpenACC] C++ reference mapping
2018-09-09 Cesar Philippidis <cesar@codesourcery.com>
Julian Brown <julian@codesourcery.com>
PR middle-end/86336
gcc/cp/
* semantics.c (finish_omp_clauses): Treat C++ references the same in
OpenACC as OpenMP.
gcc/
* gimplify.c (gimplify_scan_omp_clauses): Set
target_firstprivatize_array_bases in OpenACC parallel and kernels
region contexts. Remove GOMP_MAP_FIRSTPRIVATE_REFERENCE clauses from
OpenACC data regions.
libgomp/
* testsuite/libgomp.oacc-c++/non-scalar-data.C: Remove XFAIL.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/semantics.c
trunk/gcc/gimplify.c
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c++/non-scalar-data.C
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Eric, can you please contribute a documentation patch that would explain what
-fstack-check is designed to do? Existing documentation does not say anything
about the extra page. Is it supposed to be useful for languages other that Ada
at all?
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From: "pdbain at ca dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87289] New: jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 15:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87289
Bug ID: 87289
Summary: jdk11 plinux compiled with gcc 7.3 doesn't work with
NativeImageBuffer
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pdbain at ca dot ibm.com
Target Milestone: ---
Created attachment 44683
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44683&action=edit
Test code and sample source code
Further to https://github.com/eclipse/openj9/issues/2788
GCC does not compile "jnicsup.cpp" correctly when optimization is enabled.
It appears that "pushArguments()" is not placing the correct data on the Java
stack.
Inserting a printf makes the test pass.
To reproduce:
download and build OpenJ9 per instructions in
https://www.eclipse.org/openj9/oj9_build.html (use "git clone
https://github.com/ibmruntimes/openj9-openjdk-jdk11"). Replace
"openj9/runtime/vm/jnicsup.cpp" with the copy from the attached archive. Enable
or disable the printf on line 522.
To test, put "testgras.class" in the current directory and run
"java testgras"
(the "java" command will be in a directory called
"build/linux-ppc64le-normal-server-release/images/jdk/bin")
If the test is successful, no exception is thrown.
This bug may date back to version 5.
>From gcc-bugs-return-615127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 15:55:14 2018
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 16:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87289
Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Please see https://gcc.gnu.org/bugs/ for how to submit a bug report.
Specifically, we need
"the preprocessed file (*.i*) that triggers the bug, generated by adding
-save-temps to the complete compilation command."
The information you've provided is helpful, but you shouldn't expect us to
download and build entire packages to reproduce the bug.
>From gcc-bugs-return-615128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:16:36 2018
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From: "minshall at acm dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87242] optimize -O2 incorrect output
Date: Wed, 12 Sep 2018 16:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87242
--- Comment #5 from Greg Minshall <minshall at acm dot org> ---
Created attachment 44684
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44684&action=edit
creduce'd (but, only partly) test case.
module_intern() is the function i creduce'd on (my creduce "interesting"
required module_intern() to be unchanged in the .c file, and emacs_intern() in
the -O2 .s file to be within epsilon of unchanged, as well as in the non-O2 .s
file to have a call to lisp_to_value()).
with -O2, it makes a couple of calls then returns 0, which is incorrect
behavior.
>From gcc-bugs-return-615129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:23:27 2018
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Wed, 12 Sep 2018 16:23:00 -0000
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Eric, can you please contribute a documentation patch that would explain
> what -fstack-check is designed to do? Existing documentation does not say
> anything about the extra page. Is it supposed to be useful for languages
> other that Ada at all?
I presume so, if you need to recover from the stack overflow. Not every
language can afford to simply abort the process like C...
>From gcc-bugs-return-615130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:23:40 2018
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Subject: [Bug rtl-optimization/86771] [9 Regression] gfortran.dg/actual_array_constructor_1.f90 fails on arm after combine 2 insns to 2 insns patch
Date: Wed, 12 Sep 2018 16:25:00 -0000
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--- Comment #23 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Sep 12 16:23:01 2018
New Revision: 264245
URL: https://gcc.gnu.org/viewcvs?rev=264245&root=gcc&view=rev
Log:
Backport PR86771 fix to 8
2018-09-12 Segher Boessenkool <segher@kernel.crashing.org>
Backport from trunk
2018-08-22 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/86771
* combine.c (try_combine): Do not allow splitting a resulting PARALLEL
of two SETs into those two SETs, one to be placed at i2, if that SETs
destination is modified between i2 and i3.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/combine.c
>From gcc-bugs-return-615131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:25:38 2018
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Subject: [Bug rtl-optimization/86771] [9 Regression] gfortran.dg/actual_array_constructor_1.f90 fails on arm after combine 2 insns to 2 insns patch
Date: Wed, 12 Sep 2018 16:28:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #24 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on trunk and 8; closing as fixed.
>From gcc-bugs-return-615132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:28:04 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87290] New: Optimize signed x % pow2p == cst
Date: Wed, 12 Sep 2018 16:28:00 -0000
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Bug ID: 87290
Summary: Optimize signed x % pow2p == cst
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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As mentioned in https://gcc.gnu.org/ml/gcc-patches/2015-07/msg02005.html and
PR82853, we don't and should optimize signed x % 16 == 13 to x & (INT_MIN | 15)
== 13 and x % 16 == -13 to x & (INT_MIN | 15) == (-13 & (INT_MIN | 15)).
>From gcc-bugs-return-615133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:28:26 2018
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Subject: [Bug middle-end/87290] Optimize signed x % pow2p == cst
Date: Wed, 12 Sep 2018 16:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-12
CC| |ktkachov at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I have a patch.
>From gcc-bugs-return-615134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:36:37 2018
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Subject: [Bug c/87242] optimize -O2 incorrect output
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rpluim at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rpluim at gmail dot com
--- Comment #6 from rpluim at gmail dot com ---
Based on my bisection of gcc using the same emacs test case, this was fixed by:
commit e98da821c1ee4450bbe40a0278cd75803706aa7c (HEAD, refs/bisect/new)
Author: hubicka <address@hidden>
Date: Sun Dec 20 05:50:29 2015 +0000
PR middle-end/65337
* tree-ssa-dce.c (bb_postorder): New static var.
(forward_edge_to_pdom): Remove.
(remove_dead_stmt): Instead of redirecting edges only keep an
edge
on a path to nearest live BB.
(eliminate_unnecessary_stmts): Free bb_postorder.
* cfganal.c (dfs_find_deadend): Add START_POINTES.
* cfganal.h (inverted_post_order_compute): Update prototype.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/address@hidden
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 16:38:00 -0000
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--- Comment #2 from pdbain at ca dot ibm.com ---
Created attachment 44685
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44685&action=edit
Bad version of jnicsup
>From gcc-bugs-return-615136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 16:38:04 2018
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 16:39:00 -0000
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--- Comment #3 from pdbain at ca dot ibm.com ---
Created attachment 44686
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44686&action=edit
Good version of jnicsup
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 16:45:00 -0000
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--- Comment #4 from pdbain at ca dot ibm.com ---
Compiler command line:
/usr/bin/g++ -save-temps -DOPENJ9_BUILD -O3 -U_FORTIFY_SOURCE
-D_FORTIFY_SOURCE=1 -fno-exceptions -fno-rtti -fno-threadsafe-statics -g
-DLINUX -D_REENTRANT -D_FILE_OFFSET_BITS=64 -fpic -DIPv6_FUNCTION_SUPPORT
-DLINUXPPC -m64 -DLINUXPPC64 -DPPC64 -Wreturn-type -Werror -I. -I../include
-I../oti -I../util -I../gc_include -I../omr/gc/include
-I../shared_common/include -I../gc_glue_java -I../nls -I../omr/include_core
-DUT_DIRECT_TRACE_REGISTRATION -DTR_HOST_POWER -c jnicsup.cpp
ss.o FastJNI_java_lang_ClassLoader.o FastJNI_java_lang_J9VMInternals.o
FastJNI_java_lang_Object.o FastJNI_java_lang_String.o
FastJNI_java_lang_System.o FastJNI_java_lang_Thread.o
FastJNI_java_lang_Throwable.o FastJNI_java_lang_invoke_MethodHandle.o
FastJNI_java_lang_ref_Reference.o FastJNI_java_lang_reflect_Array.o
FastJNI_sun_misc_Unsafe.o FlushProcessWriteBuffers.o J9OMRHelpers.o
KeyHashTable.o MHInterpreter.o ModularityHashTables.o NativeHelpers.o
ObjectFieldInfo.o ObjectMonitor.o OutOfLineINL_com_ibm_jit_JITHelpers.o
OutOfLineINL_java_lang_invoke_NativeMethodHandle.o
OutOfLineINL_jdk_internal_misc_Unsafe.o StackDumper.o VMAccess.o annsup.o
bchelper.o bindnatv.o callin.o classallocation.o classloadersearch.o classseg.o
classsupport.o createramclass.o description.o dllsup.o drophelp.o
exceptiondescribe.o exceptionsupport.o findmethod.o gphandle.o growstack.o
guardedstorage.o hookableAsync.o initsendtarget.o intfunc.o javaPriority.o
jnicgen.o jnicsup.o jnifield.o jniinv.o jnimem.o jnimisc.o jnireflect.o
jvmfree.o jvminit.o jvminitcommon.o jvmrisup.o linearswalk.o lockwordconfig.o
logsupport.o lookuphelper.o lookupmethod.o monhelpers.o montable.o
ownedmonitors.o pcinterp.o profilingbc.o rasdump.o rastrace.o resolvefield.o
resolvesupport.o romclasses.o romutil.o segment.o statistics.o stringhelpers.o
swalk.o threadhelp.o threadpark.o throwexception.o unsafeHelper.o ut_j9vm.o
visible.o vmbootlib.o vmhook.o vmifunc.o vmizip.o vmphases.o vmprops.o
vmruntimestate.o vmthinit.o vmthread.o xcheck.o \
-Xlinker --start-group -lj9verutil -lj9util -lj9utilcore -lj9stackmap
-lj9bcv -lj9dyn -lj9simplepool -lj9zip -lffi -lj9avl -lj9hashtable -lj9pool
-lj9omr -Xlinker --end-group -lj9thr29 -lj9hookable29 -lj9prt29 -lomrsig -g
-lc -lm
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Subject: [Bug c/87242] optimize -O2 incorrect output
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
As mentioned in PR 65337, this is fixed in gcc-6+, and the gcc-5 branch is now
closed.
*** This bug has been marked as a duplicate of bug 65337 ***
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Subject: [Bug tree-optimization/65337] [5 regression] LTO bootstrap failure with Ada enabled
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |minshall at acm dot org
--- Comment #19 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
*** Bug 87242 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/87290] Optimize signed x % pow2p == cst
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44687
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44687&action=edit
gcc9-pr87290.patch
Untested patch.
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From: "pdbain at ca dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 17:24:00 -0000
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--- Comment #5 from pdbain at ca dot ibm.com ---
The compiler trips on this part of jnicsup.cpp (ca. line 500):
#ifdef J9VM_INTERP_FLOAT_SUPPORT
case 'F':
/* float type */
fltPtr = (jfloat*)--sp;
/* The Linux SH4 compiler needs the next two
lines to be two steps. If you combine them it fails to compile */
dbl = ARG(jdouble, f);
*fltPtr = (jfloat)dbl;
break;
case 'D':
/* double type */
dbl = ARG(jdouble, d);
lngOrDblPtr = (UDATA *) &dbl;
goto pushLongOrDouble;
#endif
case 'J':
/* long type */
lng = ARG(jlong, j);
lngOrDblPtr = (UDATA *) &lng;
pushLongOrDouble:
#ifdef J9VM_ENV_DATA64
--sp;
*--sp = *(lngOrDblPtr);
#else
*--sp = *(lngOrDblPtr + 1);
*--sp = *(lngOrDblPtr);
#endif
break;
Replacing the "goto" with a copy of the "gone-to" code makes the test pass.
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--- Comment #6 from Rich Felker <bugdal at aerifal dot cx> ---
Eric, even accepting the purpose in 1, what I described in 2 seems like a bug.
If it needs an extra page past what's actually used, it needs to make one probe
in the last-used page to ensure it doesn't jump a guard page.
Anyway, I'll accept that this feature just isn't useful for what I wanted it
for, but I agree with Alexander that it should be clearly documented that not
only is it not intended for this purpose, but it fails to perform this purpose
at all and can even introduce new jump-the-guard-page conditions that would not
have been present without the option.
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Wed, 12 Sep 2018 17:59:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Eric, even accepting the purpose in 1, what I described in 2 seems like a
> bug. If it needs an extra page past what's actually used, it needs to make
> one probe in the last-used page to ensure it doesn't jump a guard page.
Not if it's caller has done so for it though.
> Anyway, I'll accept that this feature just isn't useful for what I wanted it
> for, but I agree with Alexander that it should be clearly documented that
> not only is it not intended for this purpose, but it fails to perform this
> purpose at all and can even introduce new jump-the-guard-page conditions
> that would not have been present without the option.
We cannot reasonably document that a feature does exactly the opposite of what
it is intended to do, can we? You need to compile the entire software with the
option, that's all.
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Subject: [Bug target/86989] ICE in rs6000_output_addr_const_extra, at config/rs6000/rs6000.c:20994
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Sep 12 17:58:31 2018
New Revision: 264246
URL: https://gcc.gnu.org/viewcvs?rev=264246&root=gcc&view=rev
Log:
Backport patch for PR86989 to 8
2018-09-12 Segher Boessenkool <segher@kernel.crashing.org>
Backport from trunk
2018-08-24 Segher Boessenkool <segher@kernel.crashing.org>
PR target/86989
* config/rs6000/rs6000.c (toc_relative_expr_p): Check that the base is
the TOC register.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
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Subject: [Bug target/86989] ICE in rs6000_output_addr_const_extra, at config/rs6000/rs6000.c:20994
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Sep 12 18:01:11 2018
New Revision: 264247
URL: https://gcc.gnu.org/viewcvs?rev=264247&root=gcc&view=rev
Log:
Backport patch for PR86989 to 7
2018-09-12 Segher Boessenkool <segher@kernel.crashing.org>
Backport from trunk
2018-08-24 Segher Boessenkool <segher@kernel.crashing.org>
PR target/86989
* config/rs6000/rs6000.c (toc_relative_expr_p): Check that the base is
the TOC register.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
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Subject: [Bug target/86989] ICE in rs6000_output_addr_const_extra, at config/rs6000/rs6000.c:20994
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on 7 and later.
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 18:13:00 -0000
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--- Comment #6 from pdbain at ca dot ibm.com ---
Created attachment 44688
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44688&action=edit
Reworked code without goto across cases
This version works.
>From gcc-bugs-return-615148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 12 18:13:33 2018
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From: "programmerjake at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug jit/87291] New: Add support for inline asm to libgccjit
Date: Wed, 12 Sep 2018 18:28:00 -0000
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Bug ID: 87291
Summary: Add support for inline asm to libgccjit
Product: gcc
Version: unknown
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Priority: P3
Component: jit
Assignee: dmalcolm at gcc dot gnu.org
Reporter: programmerjake at gmail dot com
Target Milestone: ---
I'm thinking of using libgccjit for generating code for a custom RISC-V
architecture. Support for using inline asm would be nice so I can use stock gcc
without having to add lots of intrinsics for custom instructions.
If this isn't the right place for feature requests please let me know.
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 12 18:28:20 2018
New Revision: 264248
URL: https://gcc.gnu.org/viewcvs?rev=264248&root=gcc&view=rev
Log:
PR middle-end/82853
* expr.h (maybe_optimize_mod_cmp): Declare.
* expr.c (mod_inv): New function.
(maybe_optimize_mod_cmp): New function.
(do_store_flag): Use it.
* cfgexpand.c (expand_gimple_cond): Likewise.
* gcc.target/i386/pr82853-1.c: New test.
* gcc.target/i386/pr82853-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82853-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82853-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/expr.c
trunk/gcc/expr.h
trunk/gcc/testsuite/ChangeLog
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Wed, 12 Sep 2018 18:31:00 -0000
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--- Comment #23 from dave.anglin at bell dot net ---
On 2018-09-12 4:03 AM, rguenth at gcc dot gnu.org wrote:
> --- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to dave.anglin from comment #21)
>> On 2018-09-09 2:46 PM, rguenther at suse dot de wrote:
>>> In the last patch you replace arg0 || arg1 with arg0 & & arg1, that looks
>>> wrong. Otherwise the patch looks OK.
>> It was intentional. See the comment in dojump.c:
>>
>> Â /* If function pointers need to be "canonicalized" before they can
>> Â Â Â Â be reliably compared, then canonicalize them.
>> Â Â Â Â Only do this if*both* sides of the comparison are function pointers.
>>     If one side isn't, we want a noncanonicalized comparison. See PR
>>     middle-end/17564. */
>> Â if (targetm.have_canonicalize_funcptr_for_compare ()
>> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop0))
>> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop1))
>> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0)))
>> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop1))))
>>
>> Based on this, I thought that we could allow do_store_flag to output a
>> "scc" instruction
>> when both sides weren't function or method pointers.
> Ah, I see.
Based on my testing, when we have a function or method pointer for one
of the operands, the other
operand is either a function, method or void pointer. An implicit cast
occurs if one compares a function
pointer to say an int or int*. Of course, a warning is generated in
that case. So, we want to canonicalize
when one of the operands is a function or method pointer. This
canonicalizes comparisons of a function
pointer and a void pointer.
Attached is latest patch.
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Subject: [Bug jit/87291] Add support for inline asm to libgccjit
Date: Wed, 12 Sep 2018 18:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87291
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Feature requests like this are fine here (though I make no guarantees about
actually implementing them).
Any thoughts on what the API should look like?
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Subject: [Bug fortran/87284] [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
Date: Wed, 12 Sep 2018 18:50:00 -0000
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--- Comment #1 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Wed Sep 12 18:33:13 2018
New Revision: 264249
URL: https://gcc.gnu.org/viewcvs?rev=264249&root=gcc&view=rev
Log:
2018-09-12 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* trans-expr.c (gfc_trans_class_init_assign): Access to
to array elements of the dynamic type requires that the array
reference be added to the class expression and not the _data
component, unlike scalar expressions.
2018-09-12 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* gfortran.dg/allocate_with_mold_2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocate_with_mold_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85110] Missing underlines for some bad arguments
Date: Wed, 12 Sep 2018 18:54:00 -0000
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--- Comment #8 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Wed Sep 12 18:50:08 2018
New Revision: 264250
URL: https://gcc.gnu.org/viewcvs?rev=264250&root=gcc&view=rev
Log:
C++: special-case single non-viable candidate (more PR c++/85110)
I broke out the "no viable candidates" case in build_new_method_call_1
into a subroutine, and added special-case handling for when there's
a single non-viable candidate where there's an argument conversion
error. I turned the error-handling from convert_for_assignment into
a subroutine, calling it from this new special-case.
This converts:
demo.cc: In function 'int test_4(int, const char*, float)':
demo.cc:5:44: error: no matching function for call to 's4::member_1(int&, const
char*&, float&)'
5 | return s4::member_1 (first, second, third);
| ^
demo.cc:1:24: note: candidate: 'static int s4::member_1(int, const char**,
float)'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ^~~~~~~~
demo.cc:1:56: note: no known conversion for argument 2 from 'const char*' to
'const char**'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ~~~~~~~~~~~~~^~~
to:
demo.cc: In function 'int test_4(int, const char*, float)':
demo.cc:5:31: error: cannot convert 'const char*' to 'const char**'
5 | return s4::member_1 (first, second, third);
| ^~~~~~
| |
| const char*
demo.cc:1:56: note: initializing argument 2 of 'static int s4::member_1(int,
const char**, float)'
1 | struct s4 { static int member_1 (int one, const char **two, float three);
};
| ~~~~~~~~~~~~~^~~
thus highlighting the problematic argument at the callsite (and its type).
gcc/cp/ChangeLog:
PR c++/85110
* call.c (struct conversion_info): Add "loc" field.
(arg_conversion_rejection): Add "loc" param, using it to
initialize the new field.
(bad_arg_conversion_rejection): Likewise.
(explicit_conversion_rejection): Initialize the new field to
UNKNOWN_LOCATION.
(template_conversion_rejection): Likewise.
(add_function_candidate): Pass on the argument location to the new
param of arg_conversion_rejection.
(add_conv_candidate): Likewise.
(build_builtin_candidate): Likewise.
(build_user_type_conversion_1): Likewise.
(single_z_candidate): New function.
(maybe_get_bad_conversion_for_unmatched_call): New function.
(complain_about_bad_argument): New function, based on part of
convert_for_assignment.
(build_new_method_call_1): Split out handling of the "no viable
candidates" case into...
(complain_about_no_candidates_for_method_call): ...this new
function, and use the new functions above to special-case the
handling of a single non-viable candidate due to a bad argument.
* cp-tree.h (complain_about_bad_argument): New decl.
* typeck.c (convert_for_assignment): Split out one error-handling
case into complain_about_bad_argument.
gcc/testsuite/ChangeLog:
PR c++/85110
* g++.dg/cpp0x/explicit4.C: Update expected output to reflect
special-casing of diagnostic for a single non-viable candidate due
to a bad argument.
* g++.dg/diagnostic/param-type-mismatch-2.C: Likewise.
Add test coverage for an unmatched overloaded operator.
* g++.dg/expr/pmf-1.C: Likewise.
* g++.old-deja/g++.bugs/900330_02.C: Likewise.
* g++.old-deja/g++.jason/conversion11.C: Likewise.
* g++.old-deja/g++.law/arg11.C: Likewise.
* g++.old-deja/g++.law/arm9.C: Likewise.
* g++.old-deja/g++.robertl/eb131.C: Likewise.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/explicit4.C
trunk/gcc/testsuite/g++.dg/diagnostic/param-type-mismatch-2.C
trunk/gcc/testsuite/g++.dg/expr/pmf-1.C
trunk/gcc/testsuite/g++.old-deja/g++.bugs/900330_02.C
trunk/gcc/testsuite/g++.old-deja/g++.jason/conversion11.C
trunk/gcc/testsuite/g++.old-deja/g++.law/arg11.C
trunk/gcc/testsuite/g++.old-deja/g++.law/arm9.C
trunk/gcc/testsuite/g++.old-deja/g++.robertl/eb131.C
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Subject: [Bug fortran/87284] [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
Date: Wed, 12 Sep 2018 20:57:00 -0000
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Wed Sep 12 18:53:50 2018
New Revision: 264251
URL: https://gcc.gnu.org/viewcvs?rev=264251&root=gcc&view=rev
Log:
2018-09-12 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* trans-expr.c (gfc_trans_class_init_assign): Access to
to array elements of the dynamic type requires that the array
reference be added to the class expression and not the _data
component, unlike scalar expressions.
2018-09-12 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* gfortran.dg/allocate_with_mold_2.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/allocate_with_mold_2.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/trans-expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Wed, 12 Sep 2018 21:11:00 -0000
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Do things work if you add the -fno-strict-aliasing compiler flag?
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
Date: Wed, 12 Sep 2018 21:44:00 -0000
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--- Comment #5 from ville at gcc dot gnu.org ---
Author: ville
Date: Wed Sep 12 21:10:43 2018
New Revision: 264253
URL: https://gcc.gnu.org/viewcvs?rev=264253&root=gcc&view=rev
Log:
PR c++/87093
gcc/cp
PR c++/87093
* method.c (constructible_expr): We're in an unevaluated context
in all cases, not just for class targets.
testsuite/
PR c++/87093
* g++.dg/ext/is_constructible2.C: New.
Added:
trunk/gcc/testsuite/g++.dg/ext/is_constructible2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/method.c
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
Date: Wed, 12 Sep 2018 21:47:00 -0000
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--- Comment #6 from ville at gcc dot gnu.org ---
Author: ville
Date: Wed Sep 12 21:43:49 2018
New Revision: 264254
URL: https://gcc.gnu.org/viewcvs?rev=264254&root=gcc&view=rev
Log:
PR c++/87093
Backport from mainline
2018-09-13 Ville Voutilainen <ville.voutilainen@gmail.com>
gcc/cp
PR c++/87093
* method.c (constructible_expr): We're in an unevaluated context
in all cases, not just for class targets.
testsuite/
PR c++/87093
* g++.dg/ext/is_constructible2.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ext/is_constructible2.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/method.c
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
Date: Thu, 13 Sep 2018 00:58:00 -0000
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Fixed.
>From gcc-bugs-return-615159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 00:58:57 2018
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87288] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Thu, 13 Sep 2018 01:29:00 -0000
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--- Comment #3 from bin cheng <amker at gcc dot gnu.org> ---
Sorry for the breakage, will investigate this soon. Thanks.
>From gcc-bugs-return-615160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 01:29:23 2018
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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Thu, 13 Sep 2018 06:45:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |bergner at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #8 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to pdbain from comment #5)
> The compiler trips on this part of jnicsup.cpp (ca. line 500):
>
> #ifdef J9VM_INTERP_FLOAT_SUPPORT
> case 'F':
> /* float type */
> fltPtr = (jfloat*)--sp;
> /* The Linux SH4 compiler needs the next two lines to be two steps. If
> you combine them it fails to compile */
> dbl = ARG(jdouble, f);
> *fltPtr = (jfloat)dbl;
> break;
> case 'D':
> /* double type */
> dbl = ARG(jdouble, d);
> lngOrDblPtr = (UDATA *) &dbl;
> goto pushLongOrDouble;
> #endif
> case 'J':
> /* long type */
> lng = ARG(jlong, j);
> lngOrDblPtr = (UDATA *) &lng;
> pushLongOrDouble:
> #ifdef J9VM_ENV_DATA64
> --sp;
> *--sp = *(lngOrDblPtr);
> #else
> *--sp = *(lngOrDblPtr + 1);
> *--sp = *(lngOrDblPtr);
> #endif
> break;
I was able to create a small reproducer program and it shows you have a
-fstrict-aliasing bug in your source code. You take the address of the double
var "dbl" and cast its address to a UDATA * pointer and then use it. That
violates aliasing rules. I was able to get my small reproducer program to work
using the -fno-strict-aliasing option as well as using -O0 and -O1 where
-fstrict-aliasing is not enabled by default.
I'll note that a quick scan through pushArguments() shows other code that looks
to violate the aliasing rules too. You can either use -fno-strict-aliasing as
a work around or you will need to fix your code.
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From: "nunojpg at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87292] New: Warnings with Bit Fields
Date: Thu, 13 Sep 2018 06:50:00 -0000
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Bug ID: 87292
Summary: Warnings with Bit Fields
Product: gcc
Version: 8.2.1
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Severity: normal
Priority: P3
Component: c++
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#include <cstdint>
#include <initializer_list>
int main()
{
struct{
uint8_t c1:6;
uint8_t c2:6;
} a;
auto c = {a.c1, a.c2}; //warning: narrowing conversion of '(unsigned
char)c1' from 'unsigned char' to 'unsigned char:6' [-Wnarrowing]
enum class Bool{False=0, True=1};
struct{
Bool v:1; //warning: 'v' is too small to hold all values of 'enum class
main()::Bool'
} b;
return 0;
}
I get this 2 warnings with g++, including trunk, but not with clang++.
I believe the first case is a bug, c1 is promoted to uint8_t and then is
truncated back to uint8_t:6.
The second case I am not sure if the warning is reasonable. For example clang++
will also not warn if the enum class have values defined that do not fit, and
instead will only warn if it detects a assignment that causes truncation.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 06:51:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the second is correct but I dont know the exact rules about enum
classes; are they unsigned by default? I know normal emuns are signed by
default.
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From: "nunojpg at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 06:59:00 -0000
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--- Comment #2 from Nuno Gonçalves <nunojpg at gmail dot com> ---
Not the case since, same warning if:
enum class Bool : uint8_t {False=0, True=1}
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Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 07:01:00 -0000
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--- Comment #3 from Nuno Gonçalves <nunojpg at gmail dot com> ---
Also to add, this could be suppressed if
enum class Bool : bool{False=0, True=1};
So a better example is for a 2 bit BitField:
enum class Nr : uint8_t{Zero=0, One=1, Two=2, Three=3};
struct{
Nr v:2;
} b;
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87188] Function pointer canonicalization optimized away
Date: Thu, 13 Sep 2018 07:37:00 -0000
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--- Comment #24 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 12 Sep 2018, dave.anglin at bell dot net wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87188
>
> --- Comment #23 from dave.anglin at bell dot net ---
> On 2018-09-12 4:03 AM, rguenth at gcc dot gnu.org wrote:
> > --- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
> > (In reply to dave.anglin from comment #21)
> >> On 2018-09-09 2:46 PM, rguenther at suse dot de wrote:
> >>> In the last patch you replace arg0 || arg1 with arg0 & & arg1, that looks
> >>> wrong. Otherwise the patch looks OK.
> >> It was intentional. See the comment in dojump.c:
> >>
> >> Â /* If function pointers need to be "canonicalized" before they can
> >> Â Â Â Â be reliably compared, then canonicalize them.
> >> Â Â Â Â Only do this if*both* sides of the comparison are function pointers.
> >>     If one side isn't, we want a noncanonicalized comparison. See PR
> >>     middle-end/17564. */
> >> Â if (targetm.have_canonicalize_funcptr_for_compare ()
> >> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop0))
> >> Â Â Â Â Â && POINTER_TYPE_P (TREE_TYPE (treeop1))
> >> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0)))
> >> Â Â Â Â Â && FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (treeop1))))
> >>
> >> Based on this, I thought that we could allow do_store_flag to output a
> >> "scc" instruction
> >> when both sides weren't function or method pointers.
> > Ah, I see.
> Based on my testing, when we have a function or method pointer for one
> of the operands, the other
> operand is either a function, method or void pointer. An implicit cast
> occurs if one compares a function
> pointer to say an int or int*. Of course, a warning is generated in
> that case. So, we want to canonicalize
> when one of the operands is a function or method pointer. This
> canonicalizes comparisons of a function
> pointer and a void pointer.
>
> Attached is latest patch.
LGTM.
>From gcc-bugs-return-615166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 07:37:28 2018
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Subject: [Bug tree-optimization/87287] Move signed (x % pow2) == 0 optimization to gimple
Date: Thu, 13 Sep 2018 07:39:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 13 07:36:50 2018
New Revision: 264260
URL: https://gcc.gnu.org/viewcvs?rev=264260&root=gcc&view=rev
Log:
PR tree-optimization/87287
* fold-const.c (fold_binary_loc) <case EQ_EXPR>: Move signed modulo
X % C == 0 to X % (unsigned) C == 0 optimization to ...
* match.pd (X % C == 0): ... here. New optimization.
* gcc.dg/tree-ssa/pr87287.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr87287.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 07:39:38 2018
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Subject: [Bug c++/87051] is_trivially_move_constructible wrongly gives `false` for class with user-provided non-const copy constructor
Date: Thu, 13 Sep 2018 07:43:00 -0000
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--- Comment #2 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Patch available: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00670.html
>From gcc-bugs-return-615168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 07:43:30 2018
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Subject: [Bug middle-end/87290] Optimize signed x % pow2p == cst
Date: Thu, 13 Sep 2018 08:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87290
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 13 07:42:55 2018
New Revision: 264261
URL: https://gcc.gnu.org/viewcvs?rev=264261&root=gcc&view=rev
Log:
PR middle-end/87290
* expr.c (maybe_optimize_pow2p_mod_cmp): New function.
(maybe_optimize_mod_cmp): Use it if integer_pow2p treeop1.
* gcc.target/i386/pr87290.c: New test.
* gcc.c-torture/execute/pr87290.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr87290.c
trunk/gcc/testsuite/gcc.target/i386/pr87290.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 08:03:30 2018
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Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 08:07:00 -0000
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--- Comment #4 from Nuno Gonçalves <nunojpg at gmail dot com> ---
I found that the issue with enum have been extensively debated at #61414.
Sorry.
So actually this bug report is only regarding the warning with initializer
list:
struct{
uint8_t c1:6;
uint8_t c2:6;
} a;
auto c = {a.c1, a.c2}; //warning: narrowing conversion of '(unsigned
char)c1' from 'unsigned char' to 'unsigned char:6' [-Wnarrowing]
>From gcc-bugs-return-615170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 08:07:05 2018
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Subject: [Bug middle-end/87290] Optimize signed x % pow2p == cst
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk. We probably want to repeat this optimization in vectorizer
pattern recognition though.
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Subject: [Bug middle-end/12849] testing divisibility by constant
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Bug 12849 depends on bug 82853, which changed state.
Bug 82853 Summary: Optimize x % 3 == 0 without modulo
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82853
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Subject: [Bug tree-optimization/87287] Move signed (x % pow2) == 0 optimization to gimple
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Done for trunk.
>From gcc-bugs-return-615172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 08:34:31 2018
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Subject: [Bug middle-end/82853] Optimize x % 3 == 0 without modulo
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #31 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk. We might still try to improve some == non-zero cases with
conditional code, and certainly should repeat this in the vectorizer's pattern
recognizer.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85871
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #9 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Problem still present: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00675.html
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 13 Sep 2018 09:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
So I have now, with FreeBSD 10.4, bootstrap with host GCC 6.4.0, a libc built
with -g -O0 (eh...):
Starting program: /root/obj/gcc/cc1 -quiet -fpreprocessed cp-demangle.i -quiet
-dumpbase cp-demangle.c -mtune=pentium -march=pentium -auxbase-strip
cp-demangle.o -g -O2 -Wno-error -version -fPIC -o cp-demangle.s
GNU C17 (GCC) version 9.0.0 20180913 (experimental) (i586-unknown-freebsd10.4)
compiled by GNU C version 6.4.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C17 (GCC) version 9.0.0 20180913 (experimental) (i586-unknown-freebsd10.4)
compiled by GNU C version 6.4.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7de01f066f6d84094dfef092696e3ed8
Program received signal SIGSEGV, Segmentation fault.
0x2a5bbb3f in __jemalloc_arena_dalloc_bin_locked (arena=0x2a8000c0,
chunk=0x2ac00000, ptr=0x2aed9000, mapelm=0x2ac02220)
at jemalloc_arena.c:1717
1717 bin->stats.allocated -= size;
(gdb) bt
#0 0x2a5bbb3f in __jemalloc_arena_dalloc_bin_locked (arena=0x2a8000c0,
chunk=0x2ac00000, ptr=0x2aed9000, mapelm=0x2ac02220)
at jemalloc_arena.c:1717
#1 0x2a5bc2d6 in __jemalloc_arena_dalloc_bin (arena=0x2a8000c0,
chunk=0x2ac00000, ptr=0x2aed9000, pageind=729, mapelm=0x2ac02220)
at jemalloc_arena.c:1733
#2 0x2a5bc371 in __jemalloc_arena_dalloc_small (arena=0x2a8000c0,
chunk=0x2ac00000, ptr=0x2aed9000, pageind=729) at jemalloc_arena.c:1749
#3 0x2a5d3913 in __jemalloc_arena_dalloc (arena=0x2a8000c0, chunk=0x2ac00000,
ptr=0x2aed9000, try_tcache=true)
at
/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/arena.h:1005
#4 __jemalloc_idallocx (ptr=<optimized out>, try_tcache=<optimized out>,
ptr=<optimized out>, try_tcache=<optimized out>)
at
/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/jemalloc_internal.h:913
#5 __jemalloc_iqallocx (ptr=0x2aed9000, try_tcache=true)
at
/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/jemalloc_internal.h:932
#6 __jemalloc_iqalloc (ptr=0x2aed9000)
at
/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/jemalloc_internal.h:939
#7 __free (ptr=0x2aed9000) at jemalloc_jemalloc.c:1277
#8 0x097d59d5 in dom_walker::dom_walker (this=0xbfbfe6b4,
direction=CDI_DOMINATORS, reachability=dom_walker::ALL_BLOCKS)
at ../../trunk/gcc/domwalk.c:236
#9 0x08e7cf6b in eliminate_dom_walker::eliminate_dom_walker (this=0xbfbfe6b4,
direction=CDI_DOMINATORS, inserted_exprs_=0x0)
at ../../trunk/gcc/tree-ssa-sccvn.c:4693
#10 0x08e80199 in eliminate_with_rpo_vn (inserted_exprs=0x0)
at ../../trunk/gcc/tree-ssa-sccvn.c:5546
#11 0x08e839b4 in do_rpo_vn (fn=0x2b197680,
entry=<edge 0x2b2afa00 (ENTRY -> 2)>, exit_bbs=0x0, iterate=true,
eliminate=true) at ../../trunk/gcc/tree-ssa-sccvn.c:6613
#12 0x08e83b1f in (anonymous namespace)::pass_fre::execute (this=0x2ac5b8c0,
fun=0x2b197680) at ../../trunk/gcc/tree-ssa-sccvn.c:6681
#13 0x08ab9021 in execute_one_pass (pass=<opt_pass* 0x2ac5b8c0 "fre"(102)>)
at ../../trunk/gcc/passes.c:2446
This is just
int *postorder = XNEWVEC (int, n_basic_blocks_for_fn (cfun));
int postorder_num = pre_and_rev_post_order_compute (NULL, postorder,
true);
m_bb_to_rpo = XNEWVEC (int, last_basic_block_for_fn (cfun));
for (int i = 0; i < postorder_num; ++i)
m_bb_to_rpo[postorder[i]] = i;
free (postorder);
^^^
#0 0x2a5bbb3f in __jemalloc_arena_dalloc_bin_locked (arena=0x2a8000c0,
chunk=0x2ac00000, ptr=0x2aed9000, mapelm=0x2ac02220)
at jemalloc_arena.c:1717
1717 bin->stats.allocated -= size;
(gdb) p bin
$1 = (arena_bin_t *) 0x1
where bin is computed as
1697 pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> LG_PAGE;
1698 run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
1699 arena_mapbits_small_runind_get(chunk, pageind)) <<
LG_PAGE));
1700 bin = run->bin;
just watching run->bin luckily(?) shows up
Hardware watchpoint 5: *$6
Old value = (arena_bin_t *) 0x2a800abc
New value = (arena_bin_t *) 0x1
vn_nary_op_insert_pieces_predicated (length=2, code=GT_EXPR, type=
<boolean_type 0x2a3a66c0 _Bool>, ops=0xbfbfe628,
result=<integer_cst 0x2b005c58>, value_id=0,
pred_e=<edge 0x2b166120 (442 -> 443)>)
at ../../trunk/gcc/tree-ssa-sccvn.c:3220
3220 return vn_nary_op_insert_into (vno1, valid_info->nary, true);
(gdb) l
3215 vno1->u.values->next = NULL;
3216 vno1->u.values->result = result;
3217 vno1->u.values->n = 1;
3218 vno1->u.values->valid_dominated_by_p[0] = pred_e->dest->index;
3219 vno1->u.values->valid_dominated_by_p[1] = EXIT_BLOCK;
3220 return vn_nary_op_insert_into (vno1, valid_info->nary, true);
3221 }
(gdb) p &vno1->u.values->valid_dominated_by_p[1]
$15 = (int *) 0x2aed3000
(gdb) p $6
$13 = (arena_bin_t **) 0x2aed3000
valid_dominated_by_p was allocated via
vno1->u.values = (vn_pval *) obstack_alloc (&vn_tables_obstack,
sizeof (vn_pval));
looks I left a stray assing from EXIT_BLOCK in the array when I made
it dynamically allocated... :/
Testing patch.
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Subject: [Bug target/85628] Make better use of BFI (BFXIL)
Date: Thu, 13 Sep 2018 10:06:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Thu Sep 13 09:46:55 2018
New Revision: 264264
URL: https://gcc.gnu.org/viewcvs?rev=264264&root=gcc&view=rev
Log:
[Aarch64] Exploiting BFXIL when OR-ing two AND-operations with appropriate
bitmasks
2018-09-13 Sam Tebbs <sam.tebbs@arm.com>
PR target/85628
* config/aarch64/aarch64.md (*aarch64_bfxil):
Define.
* config/aarch64/constraints.md (Ulc): Define.
* config/aarch64/aarch64-protos.h (aarch64_high_bits_all_ones_p):
Define.
* config/aarch64/aarch64.c (aarch64_high_bits_all_ones_p):
New function.
* gcc.target/aarch64/combine_bfxil.c: New file.
* gcc.target/aarch64/combine_bfxil_2.c: New file.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfxil_2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-protos.h
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/config/aarch64/aarch64.md
trunk/gcc/config/aarch64/constraints.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 10:13:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> I think the second is correct but I dont know the exact rules about enum
> classes; are they unsigned by default?
No, the default underlying type is 'int'
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Subject: [Bug c++/87292] Warnings with Bit Fields
Date: Thu, 13 Sep 2018 10:27:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-13
Ever confirmed|0 |1
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Nuno Gonçalves from comment #4)
> I found that the issue with enum have been extensively debated at #61414.
> Sorry.
Yes, we already have Bug 61414 for that.
> So actually this bug report is only regarding the warning with initializer
> list:
>
> struct{
> uint8_t c1:6;
> uint8_t c2:6;
> } a;
> auto c = {a.c1, a.c2}; //warning: narrowing conversion of '(unsigned
> char)c1' from 'unsigned char' to 'unsigned char:6' [-Wnarrowing]
Confirmed. The initializers should be promoted before deciding the type of the
std::initializer_list.
This should compile:
#include <initializer_list>
struct {
int c1 : 6;
int c2 : 6;
} a;
auto c = { a.c1, a.c2 };
std::initializer_list<int>& r = c;
n.cc:7:14: warning: narrowing conversion of '(int)a.<unnamed struct>::c1' from
'int' to 'signed char:6' [-Wnarrowing]
7 | auto c = { a.c1, a.c2 };
| ~~^~
n.cc:7:14: warning: narrowing conversion of 'a.<unnamed struct>::c1' from 'int'
to 'signed char:6' [-Wnarrowing]
n.cc:7:20: warning: narrowing conversion of '(int)a.<unnamed struct>::c2' from
'int' to 'signed char:6' [-Wnarrowing]
7 | auto c = { a.c1, a.c2 };
| ~~^~
n.cc:7:20: warning: narrowing conversion of 'a.<unnamed struct>::c2' from 'int'
to 'signed char:6' [-Wnarrowing]
n.cc:8:33: error: invalid initialization of reference of type
'std::initializer_list<int>&' from expression of type
'std::initializer_list<signed char:6>'
8 | std::initializer_list<int>& r = c;
|
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Subject: [Bug debug/86985] Generated DWARF does not distinguish between zero-length and flexible array types
Date: Thu, 13 Sep 2018 10:29:00 -0000
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu Sep 13 10:27:12 2018
New Revision: 264267
URL: https://gcc.gnu.org/viewcvs?rev=264267&root=gcc&view=rev
Log:
[debug] DWARF: add DW_AT_count to zero-length arrays
2018-09-13 Omar Sandoval <osandov@osandov.com>
Tom de Vries <tdevries@suse.de>
PR debug/86985
* dwarf2out.c (is_c): New function.
(add_subscript_info): Add DW_AT_count of 0 for C zero-length arrays.
* gcc.dg/guality/zero-length-array.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/guality/zero-length-array.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 13 Sep 2018 11:32:00 -0000
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--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Sep 13 11:31:58 2018
New Revision: 264268
URL: https://gcc.gnu.org/viewcvs?rev=264268&root=gcc&view=rev
Log:
2018-09-13 Richard Biener <rguenther@suse.de>
PR bootstrap/87134
* tree-ssa-sccvn.c (vn_nary_op_insert_into): Fix assert.
(vn_nary_op_insert_pieces_predicated): Do not write useless
valid_dominated_by_p entry outside of the allocated storage.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-615182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 11:32:57 2018
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Subject: [Bug tree-optimization/87271] [9 Regression] ICE in rpo_elim::~rpo_elim (this=0xbfbfe15c, __in_chrg=<optimized out>) at ../../gcc/tree-ssa-sccvn.c:5709 on FreeBSD 10.4
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup anyway
*** This bug has been marked as a duplicate of bug 87134 ***
>From gcc-bugs-return-615180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 10:29:14 2018
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Subject: [Bug debug/86985] Generated DWARF does not distinguish between zero-length and flexible array types
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Tom de Vries <vries at gcc dot gnu.org> changed:
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch with test-case committed, marking resolved-fixed.
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 13 Sep 2018 11:33:00 -0000
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--- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87271 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 11:49:10 2018
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Subject: [Bug bootstrap/12024] i386-elf build references nonexistent crt0.o, libsim.a
Date: Thu, 13 Sep 2018 11:49:00 -0000
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Sreekar <cs14btech11033 at iith dot ac.in> changed:
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CC| |cs14btech11033 at iith dot ac.in
--- Comment #6 from Sreekar <cs14btech11033 at iith dot ac.in> ---
Were you able to resolve the issue??
>From gcc-bugs-return-615184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 11:33:20 2018
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-615186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 11:49:53 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
Date: Thu, 13 Sep 2018 12:09:00 -0000
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--- Comment #23 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
> Fixed.
Indeed: I've just successfully completed a i386-pc-solaris2.11 bootstrap
without the workaround (preloaded libumem.so), and a
sparc-sun-solaris2.11 bootstrap is well into make check.
Thanks a lot.
Rainer
>From gcc-bugs-return-615187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 12:09:16 2018
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Subject: [Bug c++/87293] New: An object with invalid type is treated as if it were of type int when reporting errors
Date: Thu, 13 Sep 2018 12:16:00 -0000
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Bug ID: 87293
Summary: An object with invalid type is treated as if it were
of type int when reporting errors
Product: gcc
Version: 8.1.0
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Consider the following C++ code:
//--------------------------------
#include <memory>
int main()
{
std::shared_ptr<dbl> p(new double{5.3});
}
//--------------------------------
Here, g++ emits the following messages:
------------------BEGIN---------------------
test.cpp: In function ‘int main()’:
test.cpp:4:21: error: ‘dbl’ was not declared in this scope
std::shared_ptr<dbl> p(new double{5.3});
^~~
test.cpp:4:24: error: template argument 1 is invalid
std::shared_ptr<dbl> p(new double{5.3});
^
test.cpp:4:43: error: invalid conversion from ‘double*’ to ‘int’ [-fpermissive]
std::shared_ptr<dbl> p(new double{5.3});
^
-----------------END-----------------------
The first error is correct: there's no dbl type. But the last error makes no
sense at all. There's nothing in the code which could imply that the type of
`p` could be `int`: even if there were no type present, C++ is not C89 to imply
`int` by default.
Moreover, if we add a line which uses `p` in another erroneous way, e.g.
"struct S{}s=p;", g++ again thinks that `p` is of type `int` ("error:
conversion from ‘int’ to non-scalar type ‘main()::S’ requested").
>From gcc-bugs-return-615188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 12:16:36 2018
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Subject: [Bug tree-optimization/87259] [9 Regression] ICE: error: definition in block 3 does not dominate use in block 2
Date: Thu, 13 Sep 2018 12:46:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Patch posted at
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00640.html
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From: "daniel.f.starke at freenet dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/87294] New: [8/9 Regression] dwarf-3 generation fails with ICE
Date: Thu, 13 Sep 2018 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87294
Bug ID: 87294
Summary: [8/9 Regression] dwarf-3 generation fails with ICE
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: daniel.f.starke at freenet dot de
Target Milestone: ---
Created attachment 44690
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44690&action=edit
test case
Using GCC version 8.2.0 in mingw-w64 compiled with the following configuration
fails on the attached test case.
Configured with: ../../src/gcc-8.2.0/configure --host=x86_64-w64-mingw32
--enable-languages=c,c++ --enable-seh-exceptions --enable-threads=posix
--disable-nls --disable-shared --enable-static --enable-fully-dynamic-string
--enable-lto --enable-plugins --enable-libgomp --with-dwarf2
--enable-mingw-wildcard=platform --disable-win32-registry
--enable-version-specific-runtime-libs --prefix=/mingw64-64
--with-sysroot=/mingw64-64 --target=x86_64-w64-mingw32 --enable-targets=all
--enable-checking=release --with-gmp=/usr/new-gcc/lib/gmp-5.0.5
--with-mpfr=/usr/new-gcc/lib/mpfr-2.4.2 --with-mpc=/usr/new-gcc/lib/mpc-0.9
--with-isl=/usr/new-gcc/lib/isl-0.18 --with-cloog=/usr/new-gcc/lib/cloog-0.18.4
--with-host-libstdcxx='-lstdc++ -lsupc++' --disable-cloog-version-check
--enable-cloog-backend=isl
Thread model: posix
The command-line
g++ -Og -gdwarf-3 -fno-omit-frame-pointer -c a.cpp -o a.o
returns
during RTL pass: final
a.cpp: In function 'boost::_bi::bind_t<R, R (*)(B1, B2, B3), typename
boost::_bi::list_av_3<A1, A2, A3>::type> boost::bind(R (*)(B1, B2, B3), A1, A2,
A3) [with R = int; B1 = void*; B2 = const unsigned char*; B3 = unsigned int; A1
= boost::arg<1>; A2 = boost::arg<2>; A3 = boost::arg<3>]':
a.cpp:99:3: internal compiler error: in based_loc_descr, at
dwarf2out.c:14272
}
^
libbacktrace could not find executable to open
Removing -gdwarf-3 or -fno-omit-frame-pointer does not result in the shown
error.
This issue does not occur with GCC 7.3.0. The bug report took a while as
multidelta needed 25 days to reduce the pre-processed test file (14.6 MiB).
>From gcc-bugs-return-615190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 12:47:11 2018
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From: "pdbain at ca dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87289] jdk11 plinux compiled with gcc 7.3 doesn't work with NativeImageBuffer
Date: Thu, 13 Sep 2018 13:07:00 -0000
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--- Comment #9 from pdbain at ca dot ibm.com ---
Thank you. Code updated and working.
>From gcc-bugs-return-615191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 13:07:33 2018
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
Date: Thu, 13 Sep 2018 13:09:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Assignee|msebor at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Martin: I had a go at revamping this warning on the trip back from Cauldron,
and I have a mostly working prototype of something I like a lot. I'm tidying
it up, and hope to post it to the mailing list sometime in the next day or so
(once the FIXME count in my code is at a more reasonable level!). I'll CC you
when I do.
I'm assigning this one to me, hoping to get it into gcc 9.
In the meantime, I'm going to post some of the other UI ideas for this that
we've being chatting about, so that they're captured publicly.
>From gcc-bugs-return-615192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 13:09:51 2018
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Subject: [Bug c++/87293] An object with invalid type is treated as if it were of type int when reporting errors
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think there's an existing bug report about this.
>From gcc-bugs-return-615193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 13:10:30 2018
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #4)
> In the meantime, I'm going to post some of the other UI ideas for this that
> we've being chatting about, so that they're captured publicly.
Consider this problematic call to sprintf:
$ cat demo.c
#include <stdio.h>
const char *test_1 (const char *msg)
{
static char buf[16];
sprintf (buf, "msg: %s\n", msg);
return buf;
}
void test_2 ()
{
test_1 ("this is long enough to cause trouble");
}
Right now, we emit this (this is trunk, plus some fixes for line-
numbering bugs):
$ ./xgcc -B. -c demo.c -Wall -O2
demo.c: In function ‘test_2’:
demo.c:6:23: warning: ‘%s’ directive writing 36 bytes into a region of size 11
[-Wformat-overflow=]
6 | sprintf (buf, "msg: %s\n", msg);
| ^~
demo.c:12:11:
12 | test_1 ("this is long enough to cause trouble");
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
demo.c:6:3: note: ‘sprintf’ output 43 bytes into a destination of size 16
6 | sprintf (buf, "msg: %s\n", msg);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I brainstormed some ideas on making these kinds of warning easier for
the user to understand.
>From gcc-bugs-return-615194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 13:11:12 2018
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> I brainstormed some ideas on making these kinds of warning easier for
> the user to understand.
We could use the new labeling-of-source-ranges idea from:
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00901.html
to print something like:
demo.c: In function ‘test_2’:
demo.c:6:23: warning: ‘%s’ directive writing 36 bytes into a region of size 11
[-Wformat-overflow=]
6 | sprintf (buf, "msg: %s\n", msg);
| ~~~ ^~
| | |
| | required space: 36 bytes
| remaining capacity: 11 bytes
demo.c:12:11:
12 | test_1 ("this is long enough to cause trouble");
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| |
| required space: 36 bytes
demo.c:6:3: note: ‘sprintf’ output 43 bytes into a destination of size 16
6 | sprintf (buf, "msg: %s\n", msg);
| ~~~ ^~~~~~~~~
| | |
| | required space: 43 bytes
| size: 16 bytes
(making a distinction between "size" and "remaining capacity",
depending on whether the code is writing to the start of the buffer or
not)
Underlining "buf" requires access to its source location, which might
not be available yet in the C frontend (if so, I can look at fixing
that).
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #6)
A tweak to this would be to show the point where the overflow occurs
(if the substring location code is up to it...):
demo.c: In function ‘test_2’:
demo.c:6:23: warning: ‘%s’ directive writing 36 bytes into a region of size 11
[-Wformat-overflow=]
6 | sprintf (buf, "msg: %s\n", msg);
| ~~~ ^~
| | |
| | required space: 36 bytes
| remaining capacity: 11 bytes
demo.c:12:11:
12 | test_1 ("this is long enough to cause trouble");
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| |
| overflow occurs here
demo.c:6:3: note: ‘sprintf’ output 43 bytes into a destination of size 16
6 | sprintf (buf, "msg: %s\n", msg);
| ~~~ ^~~~~~~~~
| | |
| | required space: 43 bytes
| size: 16 bytes
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--- Comment #8 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> I brainstormed some ideas on making these kinds of warning easier for
> the user to understand.
Getting really fancy, we could emit an ASCII art visualization to
(hopefully) make the buffer overflow crystal-clear (with an option to
disable it):
demo.c:6:3: note: buffer overflow [-fdiagnostics-show-buffer-overflow]
snprintf of "%s" from:
|+---+---+ ... +---+---+|+---+---+ ... +---+---+|
|| 0| 1| | 9| 10||| 11| 12| | 41| 42||
||'t'|'h'| |'o'|'n'|||'g'|' '| |'e'|NUL||
|+---+---+ ... +---+---+|+---+---+ ... +---+---+|
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|<--- ok --->|<-- overflow -->|
| | |
to 'buf':
| | |
++---+---+---+---+---+|+---+---+ ... +---+---+|
|| 0| 1| 2| 3| 4||5 | 6| | 14| 15||
||'m'|'s'|'g'|':'|' '|||'t'|'h'| |'o'|'n'||
++---+---+---+---+---+|+---+---+ ... +---+---+|
| |
(thus showing the buffer content where it's known, eliding the middle
when it goes above 5 elements)
The parts on the right-hand side ("overflow" etc) could be colorized in
red.
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #9 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #8)
> (In reply to David Malcolm from comment #5)
> > I brainstormed some ideas on making these kinds of warning easier for
> > the user to understand.
>
> Getting really fancy, we could emit an ASCII art visualization to
Here's another version of the same UI idea, for the same diagnostic,
which tries to show the string data (in the name of readability; I
think this one is better than the above):
demo.c:6:3: note: buffer overflow...
snprintf of "%s" from:
|+-------------+|+---------------------------++---+|
|| 0 - 10 ||| 11 - 41 || 42||
||"this is lon"|||"g enough to cause trouble"||NUL||
|+-------------+|+---------------------------++---+|
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|<--- ok --->|<-- overflow -->|
| | |
to 'buf':
| | |
++-------+|+-------------+|
|| 0 - 4 ||| 5 - 15 ||
||"msg: "|||"this is lon"||
++-------+|+-------------+|
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #10 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> I brainstormed some ideas on making these kinds of warning easier for
> the user to understand.
Here's another possible visualization, of a different overflow:
snprintf of "%s" from:
|+---+ ... +---+|+---+ ... +---|
|| 0 | | n |||n+1| | 31|
|+---+ ... +---+|+---+ ... +---|
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|<--- ok --->|<--overflow-->|
| | |
to 'buf':
| | |
++---+ ... +---+|+---+ ... +---+|
|| 0 | | x |||x+1| | 15||
++---+ ... +---+|+---+ ... +---+|
In this one, 32 bytes are being written into an unknown point ("x+1")
within a buffer of size 16.
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #11 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> I brainstormed some ideas on making these kinds of warning easier for
> the user to understand.
A simple example where the overflowing write is to the start of the
buffer:
sprintf of an unbounded string to a fixed-size buf[100]:
demo.c:6:3: note: buffer overflow...
snprintf of "%s" from:
|+------+|+--------------++-------+|
||0...99|||100...strlen-1|| strlen||
|| ||| || NUL ||
|+------+|+--------------++-------+|
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|<--ok-->|<-- overflow -->|
| | |
to 'buf':
| |
|+------+|
||0...99||
|+------+|
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #12 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #5)
> I brainstormed some ideas on making these kinds of warning easier for
> the user to understand.
Copying a string to a buffer allocated with strlen(), rather than
strlen() + 1:
| | |
|+----------------+|+--------+|
||0...strlen() - 1|| NUL ||
|+----------------+|+--------+|
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|<--- ok -->|<overflow>|
| | |
to 'buf':
| |
|+----------------+|
||0...strlen() - 1||
|+----------------+|
(drawing the user's attention to the NUL terminator, because it's such
a common source of mistakes)
FWIW, I have some classes for laying out ASCII art drawings which could be
reused for this, as part of this vectorization RFC:
https://gcc.gnu.org/ml/gcc-patches/2018-07/msg01576.html
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Subject: [Bug c++/87293] An object with invalid type is treated as if it were of type int when reporting errors
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-13
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> I think there's an existing bug report about this.
I can't find it though, so confirmed.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
-ftree-coalesce-vars is a workaround for some testcases (enabled by default
with optimization).
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
Date: Thu, 13 Sep 2018 13:22:00 -0000
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--- Comment #13 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Some more examples to consider (thanks Martin):
struct MyStrings {
char a[8], b[20];
};
const struct MyStrings ms[] = {
{ "foo", "bar" }, { "abcd", "klmno" }, ...
};
Consider:
sprintf (smallbuf, "msg: %s\n", ms[1].b);
vs this case where we don't know which one we're using:
sprintf (smallbuf, "msg: %s\n", ms[idx].b);
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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--- Comment #14 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Another example from Martin:
extern char buf[80];
extern char tmpdir[80];
extern char fname[8];
void f (int num)
{
sprintf (buf, "/%s/%s-%i.tmp", tmpdir, fname, num);
}
In the most basic case (nothing beyond what's in the above is
known) GCC currently prints the rather mystifying:
warning: ‘/’ directive writing 1 byte into a region of size between 0
and 79 [-Wformat-overflow=]
7 | __builtin_sprintf (buf, "/%s/%s-%i.tmp", tmpdir, fname, num);
| ^
We need to make this more "actionable" for the end-user.
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
Date: Thu, 13 Sep 2018 13:25:00 -0000
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--- Comment #15 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #14)
Some random UI ideas (brainstorming in Emacs, so no idea if these are
*good* ideas):
warning: buffer overflow: writing 9-110 bytes into a buffer with capacity 80
[-Wformat-overflow=]
7 | __builtin_sprintf (buf, "/%s/%s-%i.tmp", tmpdir, fname, num);
| ~~~ ~~~^~~~~~~~~~
| | |
| | writing 9...110 bytes
| capacity: 80 bytes
note: details
7 | __builtin_sprintf (buf, "/%s/%s-%i.tmp", tmpdir, fname, num);
| ~~~ ab~cd~ef~g~~~h
| | || || || | |
| | || || || | 1 byte (NUL terminator)
| | || || || 4 bytes (".tmp")
| | || || |1...16 bytes ("%i" on 'num')
| | || || 1 byte ("-")
| | || |0-8 bytes ("%s" on 'fname')
| | || 1 byte ("/")
| | |0-79 bytes ("%s" on 'tmpdir')
| | 1 byte ("/")
| capacity: 80 bytes
note: layout [-fsome-option-enabling-this]
(with alternating colorization to better distinguish all those ranges and
labels)
|+---+--------------+----+-------------+-----+-----------+------+------+
start @||0 |1 |1-80|2-81 |10-89|11-90 |12-106|16-110|
size:|| 1| 0 - 79 | 1| 8| 1| 1-16???| 4| 1|
||"/"|%s on 'tmpdir'| "/"|%s on 'fname'| "-" |%i on 'num'|".tmp"| NUL |
|+---+--------------+----+-------------+-----+-----------+------+------+
or with a vertical orientation:
note: layout [-fsome-option-enabling-this]
+----------------+-----------+--------+---------------+
|element |starting at| size|cumulative size|
+----------------+-----------+--------+---------------+
|"/" | 0 | 1 | 1 |
|"%s" on 'tmpdir'| 1 | 0 - 79 | 1 - 80 |
|"/" | 1 - 80 | 1 | 2 - 81 |
|"%s" on 'fname' | 2 - 81 | 0 - 7 | 2 - 88 |
|"-" | 2 - 88 | 1 | 3 - 89 |
|"%i" on 'num' | 3 - 89 | 1- 16 | 4 - 105 |
|".tmp" | 4 - 105 | 4 | 8 - 109 |
|NUL terminator | 8 - 109 | 1 | 9 - 110 |
+----------------+-----------+--------+---------------+
(I've probably got some of the numbers wrong above, but hopefully you
get the idea of where I'm going with this).
Maybe some kind of highlight to show where we can exceed the buffer
capacity.
I like calling out the NUL terminator explicitly (as it's so easy to
get wrong), and putting "buffer overflow" upfront in the text of the
warning, as I did above.
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Subject: [Bug ada/81103] gcc/ada/terminals.c: please remove unused termio.h
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Probably time to do it indeed.
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Subject: [Bug ada/81103] gcc/ada/terminals.c: please remove unused termio.h
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oddly enough
Index: gcc/tree-ssa-coalesce.c
===================================================================
--- gcc/tree-ssa-coalesce.c (revision 264259)
+++ gcc/tree-ssa-coalesce.c (working copy)
@@ -620,7 +620,11 @@ ssa_conflicts_merge (ssa_conflicts *ptr,
{
bitmap bz = ptr->conflicts[z];
if (bz)
- bitmap_set_bit (bz, x);
+ {
+ bool was_there = bitmap_clear_bit (bz, y);
+ gcc_checking_assert (was_there);
+ bitmap_set_bit (bz, x);
+ }
}
if (bx)
changes at least the 2nd testcase to run faster (albeit memory use stays around
the same).
w/o patch
> /usr/bin/time ./cc1 -quiet t2.c
108.14user 1.62system 1:49.78elapsed 99%CPU (0avgtext+0avgdata
5610876maxresident)k
0inputs+440outputs (0major+1442106minor)pagefaults 0swaps
w/ patch
> /usr/bin/time ./cc1 -quiet t2.c
86.53user 1.46system 1:27.99elapsed 99%CPU (0avgtext+0avgdata
5610888maxresident)k
0inputs+440outputs (0major+1440069minor)pagefaults 0swaps
note this is a -O0 "optimized" cc1 binary with checking enabled so ...
It's even so slightly faster with doing
if (y < x)
{
bool was_there = bitmap_clear_bit (bz, y);
gcc_checking_assert (was_there);
bitmap_set_bit (bz, x);
}
else
{
bitmap_set_bit (bz, x);
bool was_there = bitmap_clear_bit (bz, y);
gcc_checking_assert (was_there);
}
but that's probably luck (bitmap caching and path length from start vs.
x / y). Eventually doing a forward walk also makes prefetchers
happy.
Probably with a lot of coalesces this keeps the conflict bitmaps small
(and thus the bitmap element walks fast).
Timings with release checking and optimized build:
patched:
> /usr/bin/time ../../obj/gcc/cc1 -quiet t2.c
22.91user 1.45system 0:24.38elapsed 99%CPU (0avgtext+0avgdata
5515460maxresident)k
0inputs+440outputs (0major+1378102minor)pagefaults 0swaps
patched, fancy forward walk:
> /usr/bin/time ../../obj/gcc/cc1 -quiet t2.c
22.47user 1.39system 0:23.88elapsed 99%CPU (0avgtext+0avgdata
5515420maxresident)k
0inputs+440outputs (0major+1377586minor)pagefaults 0swaps
unpatched:
> /usr/bin/time ../../obj/gcc/cc1 -quiet t2.c
46.60user 1.43system 0:48.03elapsed 99%CPU (0avgtext+0avgdata
5515380maxresident)k
0inputs+440outputs (0major+1378102minor)pagefaults 0swaps
I'm testing the simple patch now.
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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Subject: [Bug tree-optimization/87263] [9 Regression] ICE on valid code at -O1: verify_ssa failed
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Sep 13 14:15:41 2018
New Revision: 264273
URL: https://gcc.gnu.org/viewcvs?rev=264273&root=gcc&view=rev
Log:
2018-09-13 Richard Biener <rguenther@suse.de>
PR tree-optimization/87263
* tree-ssa-sccvn.c (visit_phi): Revert some earlier changes.
(struct unwind_state): Add max_rpo field.
(do_rpo_vn): Allow up-to-date loop state to be used when not iterating.
Compute max_rpo, the max RPO number a block can be backwards reached
from. Re-write non-iterating mode to a RPO ordered worklist approach,
separating it from the iterating mode.
* gcc.dg/torture/pr87263.c: New testcase.
* gcc.dg/torture/ssa-fre-2.c: Likewise.
* gcc.dg/torture/ssa-fre-3.c: Likewise.
* gcc.dg/torture/ssa-fre-4.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87263.c
trunk/gcc/testsuite/gcc.dg/torture/ssa-fre-2.c
trunk/gcc/testsuite/gcc.dg/torture/ssa-fre-3.c
trunk/gcc/testsuite/gcc.dg/torture/ssa-fre-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug debug/87294] [8/9 Regression] dwarf-3 generation fails with ICE
Date: Thu, 13 Sep 2018 14:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.3
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/87295] New: ICE with -ffat-lto-objects -fdebug-types-section -g
Date: Thu, 13 Sep 2018 14:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87295
Bug ID: 87295
Summary: ICE with -ffat-lto-objects -fdebug-types-section -g
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: nathan at gcc dot gnu.org
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Created attachment 44691
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44691&action=edit
testcase
./cc1plus -fpreprocessed bug.ii -flto -ffat-lto-objects -fdebug-types-section
-g -std=gnu++17
bug.ii: At top level:
bug.ii:17:4: internal compiler error: Segmentation fault
17 | { };
| ^
0x135b276 crash_signal
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/toplev.c:325
0x7fd5e7842f2f ???
/usr/src/debug/glibc-2.27-78-g2b47bb9cba/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x2245c90 htab_hash_string
/home/nathans/egcs/trunk/obj/x86_64/../../src/libiberty/hashtab.c:838
0xdc4487 hash_table<external_ref_hasher, xcallocator>::find_slot(external_ref*
const&, insert_option)
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/hash-table.h:414
0xd7be32 lookup_external_ref
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:8954
0xd7bed9 optimize_external_refs_1
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:8981
0xd7bfc5 optimize_external_refs_1
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:8996
0xd7c122 optimize_external_refs
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:9045
0xd80c1a output_comp_unit
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:11053
0xdb9849 dwarf2out_finish
/home/nathans/egcs/trunk/obj/x86_64/../../src/gcc/dwarf2out.c:31544
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Subject: [Bug debug/87295] ICE with -ffat-lto-objects -fdebug-types-section -g
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-13
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Ever confirmed|0 |1
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Subject: [Bug debug/87295] ICE with -ffat-lto-objects -fdebug-types-section -g
Date: Thu, 13 Sep 2018 14:46:00 -0000
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--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Oh, forgot to mention, trunk and gcc-8 (at least)
>From gcc-bugs-return-615216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 14:46:07 2018
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From: "foddex at foddex dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66670] "template argument deduction/substitution failed" with function pointers and multiple parameter packs
Date: Thu, 13 Sep 2018 17:06:00 -0000
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Marc "Foddex" Oude Kotte <foddex at foddex dot net> changed:
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----------------------------------------------------------------------------
CC| |foddex at foddex dot net
--- Comment #2 from Marc "Foddex" Oude Kotte <foddex at foddex dot net> ---
I have a similar problem with only one parameter pack, that I think is closely
related to this bug.
The following code does not work with gcc 8.1.1, gcc 8.2 and Apple LLVM version
9.1.0, but does work with MSVC 2017 15.8.4 and icc 18.0.0 (as checked with
https://godbolt.org)
template<typename _Object, typename ..._Parameters>
static void whatever(_Object*, void(_Object::*method)(_Parameters..., float))
{}
struct Foobar {
void myMethod(bool, float);
};
int main(int argc, char** argv) {
Foobar f;
whatever<Foobar, bool>(&f, &Foobar::myMethod);
}
When compiled with -std=c+=14, gcc's output is:
<source>: In function 'int main(int, char**)':
<source>:10:49: error: no matching function for call to 'whatever<Foobar,
bool>(Foobar*, void (Foobar::*)(bool, float))'
whatever<Foobar, bool>(&f, &Foobar::myMethod);
^
<source>:2:13: note: candidate: 'template<class _Object, class ... _Parameters>
void whatever(_Object*, void (_Object::*)(_Parameters ..., float))'
static void whatever(_Object*, void(_Object::*method)(_Parameters..., float))
{}
^~~~~~~~
<source>:2:13: note: template argument deduction/substitution failed:
<source>:10:49: note: mismatched types 'float' and 'bool'
whatever<Foobar, bool>(&f, &Foobar::myMethod);
^
Note that the following version of the above code DOES work perfectly, on all
aforementioned mentioned compiler versions.
template<typename _Object, typename ..._Parameters>
static void whatever(_Object*, void(_Object::*method)(float, _Parameters...))
{}
struct Foobar {
void myMethod(float, bool);
};
int main(int argc, char** argv) {
Foobar f;
whatever<Foobar, bool>(&f, &Foobar::myMethod);
}
The difference is that in the first version, the parameter pack comes first,
and then the fixed float parameter, while in the second version, the float
comes first, and then the parameter pack.
Hope this helps
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/81103] gcc/ada/terminals.c: please remove unused termio.h
Date: Thu, 13 Sep 2018 17:07:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Sep 13 17:05:40 2018
New Revision: 264277
URL: https://gcc.gnu.org/viewcvs?rev=264277&root=gcc&view=rev
Log:
PR ada/81103
* terminals.c: Do not include termio.h.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/terminals.c
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Subject: [Bug target/86806] sparc port needs updating for CVE-2017-5753
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-13
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug ada/81103] gcc/ada/terminals.c: please remove unused termio.h
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Done for GCC 9.
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Subject: [Bug target/86812] visium port needs updating for CVE-2017-5753
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/86812] visium port needs updating for CVE-2017-5753
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Sep 13 17:27:00 2018
New Revision: 264281
URL: https://gcc.gnu.org/viewcvs?rev=264281&root=gcc&view=rev
Log:
PR target/86812
* config/visium/visium.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Define.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/visium/visium.c
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86812, which changed state.
Bug 86812 Summary: visium port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86812
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From: "curlypaul924 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87296] New: -Wstringop-overflow false positive
Date: Thu, 13 Sep 2018 18:12:00 -0000
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Bug ID: 87296
Summary: -Wstringop-overflow false positive
Product: gcc
Version: 8.2.0
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Tested on gcc 8.1 and 8.2 on Ubuntu 16.04, and also on gcc (trunk) on
gcc.godbolt.org.
The following code:
extern "C" char *strncpy(char *, const char *, unsigned long);
void fill(char const * begin, char const * end, char c);
struct q {
char ids[4];
char username[6];
};
q & get();
int main() {
auto & c = get();
fill(c.ids, c.ids + sizeof(c.ids), '\0');
strncpy(c.username, "root", sizeof(c.username));
}
when compiled with g++ -O1 on x86-64, produces:
v.cpp: In function ‘int main()’:
v.cpp:16:10: warning: ‘char* strncpy(char*, const char*, long unsigned int)’
writing 6 bytes into a region of size 4 overflows the destination
[-Wstringop-overflow=]
strncpy(c.username, "root", sizeof(c.username));
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It seems that the compiler is confusing ids and username, somehow related to
passing c.ids + 4 to fill().
If I reduce the size of username to 5 bytes, the compiler generates MOV BYTE
instead of MOV DWORD for the null-padding, and there is no warning.
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |manu at gcc dot gnu.org
--- Comment #16 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
To be honest, I find the fancy UI too overwhelming and a bit redundant in
simple cases.
It is true that the diagnostics could be improved by some tweaks. I took some
of the ideas here and I came up with the following flexible template.
1. First the main warning has only four variants, depending on whether we are
writing a fixed number or a range and whether we are sure or not:
warning: formatting %d bytes will/may overflow buffer '%BUFF' of size %BUFFSIZE
warning: formatting between %d and %d bytes will/may overflow buffer '%BUFF' of
size %BUFFSIZE
Example:
demo.c:6:3: warning: formatting 43 bytes will overflow 'buff' of size 16
[-Wformat-overflow=]
6 | sprintf (buf, "msg: %s\n", msg);
| ~~~ ^~~~~~~~~
2. The next note explains the details (for all cases in comment #1):
// bounded, definite truncation copying format string
zzz.c:15:30: note: the format string will be truncated at character 'B' after
%d bytes
snprintf (d, sizeof d, "%iAB", 123);
~~~^
// unbounded, definite overflow in a directve
zzz.c:18:15: note: the terminating nul will be written after the end of 'd'
sprintf (d, "%i", 1235);
^
// unbounded, definite overflow copying format string
zzz.c:21:19: note: character ‘B’ of the format string will be written after the
end of 'd'
sprintf (d, "%iAB", 123);
~~~^
(I don't think we need to specify the offset, the column number and the caret
line should already point to the correct 'B', otherwise, it is more important
to get that fixed)
// bounded, possible truncation a directive
zzz.c:24:27: note: argument 4 corresponding to ‘%i’ has range [‘1’,
‘-2147483648’] and may be truncated after 4 bytes
snprintf (d, sizeof d, "%i", i);
~^ ~
// bounded, possible truncation copying format string
zzz.c:27:27: note: argument 4 corresponding to '%i' has range [‘1’,
‘-2147483648’] and may be truncated after 4 bytes
snprintf (d, sizeof d, "%iAB", i);
~^ ~
(these may look different, but they are exactly the same case)
// unbounded, possible overflow in a directive
zzz.c:30:16: note: argument 4 corresponding to '%i' has range [‘1’,
‘-2147483648’] and may write between 1 and 11 bytes after the end of 'd'
sprintf (d, "%i", i);
~^ ~
// unbounded, possible overflow copying format string
zzz.c:37:19: note: character 'B' of the format string may be written after the
end of 'd'
sprintf (d, "%sAB", s);
~~~^
3. And additional note may explain where the argument comes from for those
cases in (2) where we mention an argument:
demo.c:12:11: the value of 'msg' comes from here
12 | test_1 ("this is long enough to cause trouble")
I think it is not very useful to complicate it further because we would need to
consider cases where:
1. There are multiple directives of variable size.
2. The format string may be very long (too long to print).
3. The expanded arguments may be very long (too long to print).
I agree that in those cases, something like this:
note: layout [-fsome-option-enabling-this]
+----------------+-----------+--------+---------------+
|format string |starting at| size|cumulative size|
+----------------+-----------+--------+---------------+
|"/" | 0 | 1 | 1 |
|"%s" on 'tmpdir'| 1 | 0 - 79 | 1 - 80 |
|"/" | 1 - 80 | 1 | 2 - 81 |
|"%s" on 'fname' | 2 - 81 | 0 - 7 | 2 - 88 |
|"-" | 2 - 88 | 1 | 3 - 89 |
|"%i" on 'num' | 3 - 89 | 1- 16 | 4 - 105 |
|".tmp" | 4 - 105 | 4 | 8 - 109 |
|NUL terminator | 8 - 109 | 1 | 9 - 110 |
+----------------+-----------+--------+---------------+
could be useful (but I would argue that the column 'starting at' is redundant
and that there should be a column 'argument' that gives the numerical number of
the argument for directives, because the argument may be something much much
longer than 'num' or even something that we cannot pretty-print).
In any case, I would not over-complicate the default diagnostics with many
details. Just have the option to generate the table under some -f option.
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Subject: [Bug bootstrap/87134] [9 regression] SEGV in cc1 caused by r263875
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87134
--- Comment #24 from Gerald Pfeifer <gerald at pfeifer dot com> ---
Confirmed for i386-unknown-freebsd10.3 (using clang as bootstrap
compiler) as well.
Thank you, Richard!
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Subject: [Bug fortran/81748] [OOP] extensible types non-conforming behaviour
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81748
--- Comment #2 from janus at gcc dot gnu.org ---
Slightly reduced test case:
program z
implicit none
type t1
integer :: age
end type
type, extends( t1 ) :: t2
real :: height_cm
end type
type( t2 ) :: p( 4 )
p % age = (/ 1,2,3,4 /)
call s( p )
call s( p % t1 )
contains
subroutine s( man )
class( t1 ) :: man(:)
write (*,*) man % age
end subroutine
end
This prints something like:
1 2 3 4
1 0 2 1659587003
where the second line is obviously wrong.
-fdump-tree-original shows that the class containers that are build for the two
calls to 's' have exactly the same data, but different vptr, which is certainly
wrong:
{
struct __class_z_T1_1_0t class.8;
struct array01_t2 parm.9;
class.8._vptr = (struct __vtype_z_T1 * {ref-all}) &__vtab_z_T2;
parm.9.dtype = {.elem_len=8, .rank=1, .type=5};
parm.9.dim[0].lbound = 1;
parm.9.dim[0].ubound = 4;
parm.9.dim[0].stride = 1;
parm.9.data = (void *) &p[0];
parm.9.offset = -1;
class.8._data = parm.9;
s (&class.8);
}
{
struct __class_z_T1_1_0t class.10;
struct array01_t2 parm.11;
class.10._vptr = (struct __vtype_z_T1 * {ref-all}) &__vtab_z_T1;
parm.11.dtype = {.elem_len=8, .rank=1, .type=5};
parm.11.dim[0].lbound = 1;
parm.11.dim[0].ubound = 4;
parm.11.dim[0].stride = 1;
parm.11.data = (void *) &p[0];
parm.11.offset = -1;
class.10._data = parm.11;
s (&class.10);
}
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Subject: [Bug fortran/46244] gfc_compare_derived_types is buggy
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--- Comment #19 from janus at gcc dot gnu.org ---
I'll note that the ICE on comment 1 is gone since version 6, while comment 5
still ICEs with 9-trunk.
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Subject: [Bug fortran/87284] [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
Date: Thu, 13 Sep 2018 19:47:00 -0000
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Thu Sep 13 19:46:05 2018
New Revision: 264288
URL: https://gcc.gnu.org/viewcvs?rev=264288&root=gcc&view=rev
Log:
2018-09-13 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* trans-expr.c (gfc_trans_class_init_assign): Access to
to array elements of the dynamic type requires that the array
reference be added to the class expression and not the _data
component, unlike scalar expressions.
2018-09-13 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87284
* gfortran.dg/allocate_with_mold_2.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/allocate_with_mold_2.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/trans-expr.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87284] [7/8/9 Regression] Allocation of class arrays with mold results in "conditional jump or move depends on uninitialised value"
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on 7-branch thru' trunk.
Paul
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Subject: [Bug c++/16582] Wrong diagnostic when using "&a[1]" as template argument
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2005-05-09 00:48:28 |2018-9-13
Known to fail| |
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Clang:
<source>:8:9: error: non-type template argument does not refer to any
declaration
X<int, &p[0]> x3; // ERROR
^~~~
<source>:1:25: note: template parameter is declared here
template<class T, char* p> struct X {
^
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Subject: [Bug c++/39970] gcc accepts the . dot operator in template arguments
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Last reconfirmed|2012-01-06 00:00:00 |2018-9-13
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
class blah { public:
int member; };
blah global; // global
template <int param=global.member>
class template_blah { /* blah */ };
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Subject: [Bug middle-end/87296] -Wstringop-overflow false positive due to bogus MEM_REF type
Date: Thu, 13 Sep 2018 20:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |diagnostic
Last reconfirmed| |2018-09-13
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Summary|-Wstringop-overflow false |-Wstringop-overflow false
|positive |positive due to bogus
| |MEM_REF type
Known to fail| |8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the simplified C test case below. The warning sees a MEM_REF
(char[4], ...) as the destination of the strncpy call. Why the type is char[4]
is a mystery to me. I guess the type in MEM_REF really can't be trusted.
gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout pr87296.c
;; Function g (g, funcdef_no=0, decl_uid=1913, cgraph_uid=1, symbol_order=0)
g (struct S * p, const char * s)
{
void * _1;
char[4] * _2;
<bb 2> [local count: 1073741824]:
_1 = &MEM[(void *)p_3(D) + 4B];
_2 = &p_3(D)->a;
f (_2, _1);
__builtin_strncpy (_1, s_6(D), 6); [tail call]
return;
}
pr87296.c: In function ‘g’:
pr87296.c:11:3: warning: ‘__builtin_strncpy’ writing 6 bytes into a region of
size 4 overflows the destination [-Wstringop-overflow=]
11 | __builtin_strncpy (p->b, s, sizeof p->b);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug c/87297] New: [9 Regression] ICE on strncpy with an undeclared argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87297
Bug ID: 87297
Summary: [9 Regression] ICE on strncpy with an undeclared
argument
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The following ill-formed test case triggers an ICE:
$ cat t.c && gcc -S -Wall t.c
struct S { char a[4]; };
void g (struct S *p, const char *s)
{
__builtin_strncpy (c->a, s, sizeof p->a);
}
t.c: In function ‘g’:
t.c:5:22: error: ‘c’ undeclared (first use in this function)
5 | __builtin_strncpy (c->a, s, sizeof p->a);
| ^
t.c:5:22: note: each undeclared identifier is reported only once for each
function it appears in
t.c:5:3: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in sizeof_pointer_memaccess_warning, at
c-family/c-warn.c:816
5 | __builtin_strncpy (c->a, s, sizeof p->a);
| ^~~~~~~~~~~~~~~~~
0x141f756 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
/ssd/src/gcc/svn/gcc/tree.c:9417
0x7ea3ff tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/ssd/src/gcc/svn/gcc/tree.h:3239
0x9494fc sizeof_pointer_memaccess_warning(unsigned int*, tree_node*,
vec<tree_node*, va_gc, vl_embed>*, tree_node**, bool (*)(tree_node*,
tree_node*))
/ssd/src/gcc/svn/gcc/c-family/c-warn.c:816
0x880aec c_parser_postfix_expression_after_primary
/ssd/src/gcc/svn/gcc/c/c-parser.c:9176
0x88030f c_parser_postfix_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:9015
0x879f4a c_parser_unary_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:7278
0x879418 c_parser_cast_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:7119
0x877a36 c_parser_binary_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:6922
0x8771bb c_parser_conditional_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:6656
0x876ea9 c_parser_expr_no_commas
/ssd/src/gcc/svn/gcc/c/c-parser.c:6573
0x88127f c_parser_expression
/ssd/src/gcc/svn/gcc/c/c-parser.c:9325
0x8814db c_parser_expression_conv
/ssd/src/gcc/svn/gcc/c/c-parser.c:9358
0x874481 c_parser_statement_after_labels
/ssd/src/gcc/svn/gcc/c/c-parser.c:5551
0x8734dc c_parser_compound_statement_nostart
/ssd/src/gcc/svn/gcc/c/c-parser.c:5089
0x872eaa c_parser_compound_statement
/ssd/src/gcc/svn/gcc/c/c-parser.c:4923
0x86d6fe c_parser_declaration_or_fndef
/ssd/src/gcc/svn/gcc/c/c-parser.c:2351
0x86bb9d c_parser_external_declaration
/ssd/src/gcc/svn/gcc/c/c-parser.c:1644
0x86b6a1 c_parser_translation_unit
/ssd/src/gcc/svn/gcc/c/c-parser.c:1524
0x8a1458 c_parse_file()
/ssd/src/gcc/svn/gcc/c/c-parser.c:18403
0x91d06a c_common_parse_file()
/ssd/src/gcc/svn/gcc/c-family/c-opts.c:1139
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-615236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 20:33:09 2018
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Subject: [Bug c/87297] [9 Regression] ICE on strncpy with an undeclared argument
Date: Thu, 13 Sep 2018 20:59:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-13
Known to work| |8.2.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The ICE was introduced in r261515 (gcc 9.0.0):
r261515 | msebor | 2018-06-12 13:14:31 -0400 (Tue, 12 Jun 2018) | 19 lines
PR c/85931 - -Wsizeof-pointer-memaccess for strncpy with size of source
gcc/c-family/ChangeLog:
PR c/85931
* c-warn.c (sizeof_pointer_memaccess_warning): Avoid warning when
sizeof source and destination yields the same value.
gcc/ChangeLog:
PR c/85931
* fold-const.c (operand_equal_p): Handle SAVE_EXPR.
>From gcc-bugs-return-615238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 21:02:37 2018
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Subject: [Bug middle-end/54544] Option -Wuninitialized does not work as documented with volatile
Date: Thu, 13 Sep 2018 21:02:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |manu at gcc dot gnu.org
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This has nothing to do with volatile, as this reduced testcase shows:
int fct2(void);
int fct(int *p);
static int foo(int * p )
{
do {
if ( *p )
{
return fct( p );
}
}
while ( fct2() );
return 0;
}
int bar()
{
int i;
return foo( &i );
}
The issue here is that the testcase creates virtual phis
# .MEM_9 = PHI <.MEM_1(D)(2), .MEM_12(7)>
and this is not handled by the uninit pass yet.
*** This bug has been marked as a duplicate of bug 19430 ***
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Subject: [Bug middle-end/60488] missing uninitialized warning (address taken, VOP)
Date: Thu, 13 Sep 2018 21:02:00 -0000
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Even simpler:
int f (int*);
int g(void);
int foo (void)
{
int b;
if (g() && f (&b))
return 0;
return b;
}
we have:
# .MEM_7 = VDEF <.MEM_6(D)>
# USE = nonlocal null { D.1912 } (escaped)
# CLB = nonlocal null { D.1912 } (escaped)
_1 = gD.1908 ();
if (_1 != 0)
goto <bb 4>; [33.00%]
else
goto <bb 6>; [67.00%]
;; basic block 6, loop depth 0, count 719407024 (estimated locally), maybe
hot
# .MEM_11 = PHI <.MEM_7(6), .MEM_8(8)>
# DEBUG BEGIN_STMT
# VUSE <.MEM_11>
_9 = bD.1912;
but uninit pass does not follow the PHI chain for memory ops.
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Subject: [Bug middle-end/19430] taking address of a var causes missing uninitialized warning
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jimfr06 at gmail dot com
--- Comment #34 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 54544 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 13 21:09:53 2018
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Subject: [Bug c++/87293] An object with invalid type is treated as if it were of type int when reporting errors
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Probably Bug 57678
Probably we should use some kind of error_mark_node, but that is likely to
break other things.
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Subject: [Bug tree-optimization/60165] "may be used uninitialized" warning with -O3 but not with -O2
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #17 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
I don't think this is a bug. GCC warns at higher levels because it can inline.
Doing more optimization at -O2 is a separate issue.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87298
Bug ID: 87298
Summary: [9 Regression] FAIL: gcc.c-torture/execute/pr87053.c
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
On x86, r264291 gave
FAIL: gcc.c-torture/execute/pr87053.c -O0 execution test
FAIL: gcc.c-torture/execute/pr87053.c -O1 execution test
FAIL: gcc.c-torture/execute/pr87053.c -O2 execution test
FAIL: gcc.c-torture/execute/pr87053.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none execution test
FAIL: gcc.c-torture/execute/pr87053.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects execution test
FAIL: gcc.c-torture/execute/pr87053.c -O3 -g execution test
FAIL: gcc.c-torture/execute/pr87053.c -Os execution test
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Subject: [Bug c++/66924] Bad diagnostic for parameter name used as non-type template argument
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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From: "jbeulich at novell dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/87299] New: use of -save-temps causes undue macro re-definition warning
Date: Fri, 14 Sep 2018 07:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87299
Bug ID: 87299
Summary: use of -save-temps causes undue macro re-definition
warning
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Priority: P3
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This piece of code
#define x y
#pragma GCC target("avx512f")
#ifndef __AVX512F__
# define x z
#endif
wrongly triggers 'warning: "x" redefine' with -save-temps, but compiles
silently without.
Note that this is different from e.g. 57201 or 78497, albeit the underlying
theme looks to be the same.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Sep 14 06:59:21 2018
New Revision: 264304
URL: https://gcc.gnu.org/viewcvs?rev=264304&root=gcc&view=rev
Log:
2018-09-14 Richard Biener <rguenther@suse.de>
PR middle-end/63155
* tree-ssa-coalesce.c (ssa_conflicts_merge): Remove conflict
bits for the merged partition.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-coalesce.c
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
So for the alternate testcase we have
Kind Nodes Bytes
ssa names 753988 54287136
GIMPLE statements
Kind Stmts Bytes
phi nodes 747999 381049752
Bitmaps Leak Peak
Times N searches Search iter Type
tree-ssa-coalesce.c:705 (new_live_track) 91800: 0.0% 91800
6469037: 1.8% 1238519 248500 heap
tree-ssa-coalesce.c:586 (ssa_conflicts_add_one) 9916176: 3.5%4977905016
341148023: 94.8% 364290728 601796535 heap
tree-ssa-live.c:937 (new_tree_live_info) 119177600: 42.5% 119177600
2979440: 0.8% 2230467 0 heap
tree-ssa-live.c:938 (new_tree_live_info) 149077680: 53.1% 149077680
4476926: 1.2% 4467438 1379139 heap
as expected the conflict bitmaps are the issue.
We can shave off some more compile-time by noticing the asymmetry in
live_track_process_def and use bitmap_ior_into for one half. That should
be more cache friendly as well.
before:
> /usr/bin/time ./cc1 -quiet t2.c
38.98user 1.40system 0:40.39elapsed 99%CPU (0avgtext+0avgdata
5626832maxresident)k
0inputs+440outputs (0major+1448898minor)pagefaults 0swaps
after:
> /usr/bin/time ./cc1 -quiet t2.c
35.81user 1.48system 0:37.30elapsed 99%CPU (0avgtext+0avgdata
5628100maxresident)k
0inputs+440outputs (0major+1440532minor)pagefaults 0swaps
not as much as with the previous patch but still...
Moves the above to
tree-ssa-coalesce.c:812 (live_track_process_def) 9896264: 3.5%4958012960
339784598: 94.4% 301208226 660769345 heap
and then we can of course avoid touching bitmaps with already recorded
conflicts. Doing that improves things to
33.18user 1.43system 0:34.62elapsed 99%CPU (0avgtext+0avgdata
5626660maxresident)k
0inputs+440outputs (0major+1390642minor)pagefaults 0swaps
tree-ssa-coalesce.c:803 (live_track_process_def) 19912: 0.0% 19892656
1363425: 0.4% 960492 1915158 heap
tree-ssa-coalesce.c:810 (live_track_process_def) 9896264: 3.5%4958012960
339784598: 94.4% 301208226 660769345 heap
note it all seems to be a bit noisy in the end...
@@ -818,8 +794,20 @@ live_track_process_def (live_track *ptr,
if (bitmap_bit_p (ptr->live_base_var, root))
{
b = ptr->live_base_partitions[root];
- EXECUTE_IF_SET_IN_BITMAP (b, 0, x, bi)
- ssa_conflicts_add (graph, p, x);
+ bitmap bp = graph->conflicts[p];
+ if (!bp)
+ bp = graph->conflicts[p] = BITMAP_ALLOC (&graph->obstack);
+ /* Add a conflict to P to each live base partition. */
+ EXECUTE_IF_AND_COMPL_IN_BITMAP (b, bp, 0, x, bi)
+ {
+ gcc_checking_assert (x != (unsigned)p);
+ bitmap bx = graph->conflicts[x];
+ if (!bx)
+ bx = graph->conflicts[x] = BITMAP_ALLOC (&graph->obstack);
+ bitmap_set_bit (bx, p);
+ }
+ /* Add conflicts to each live base partition to P. */
+ bitmap_ior_into (bp, b);
}
}
ideally we'd be able to combine the ior_into with the EXECUTE_IF.. walk.
Manually jump-threading the case of !bp might be worth it as well, since
we are micro-optimizing this...
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From: "steinar+gcc at gunderson dot no" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87300] New: -Wredundant-move gives false positives in C++11 mode
Date: Fri, 14 Sep 2018 09:46:00 -0000
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Bug ID: 87300
Summary: -Wredundant-move gives false positives in C++11 mode
Product: gcc
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Hi,
-Wredundant-move sometimes gives false positives in C++11 mode -- the std::move
calls are simply not redundant. Case in point:
atum17:~> cat test.cc
#include <memory>
#include <utility>
class B {};
class D : public B {};
std::unique_ptr<B> foo() {
std::unique_ptr<D> d;
return std::move(d);
}
atum17:~> /usr/lib/gcc-snapshot/bin/g++ -std=c++11 -Wall -Wextra -c test.cc
test.cc: In function 'std::unique_ptr<B> foo()':
test.cc:9:19: warning: redundant move in return statement [-Wredundant-move]
9 | return std::move(d);
| ~~~~~~~~~^~~
test.cc:9:19: note: remove 'std::move' call
If you follow the warning and remove the std::move() call, GCC will still allow
the program, but that's an extension; it's malformed in C++11, and Solaris
Developer Studio rejects it. The rule that returns of NRVO-capable objects
should look for overloads as if the return value were an rvalue went into
effect only in C++14, from what I can see (DR1579,
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1579).
gcc version 9.0.0 20180908 (experimental) [trunk revision 264170] (Debian
20180908-1)
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
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--- Comment #10 from Jeremy Huddleston Sequoia <jeremyhu at macports dot org> ---
FWIW, I don't have much power other than nagging to move along the OSS drops.
Those are managed by a process, and prioritization is given to those making
explicit requests to the OSS mailing list. *PLEASE* email opensource@apple.com
directly (and feel free to CC me).
I agree with pretty much all Iain has said here. There's nothing that should
be different about how gcc treats i386 on darwin vs how it treats i386 on
linux.
Note that for us, the far bigger concerns are the broken --with-build-sysroot
support:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79885
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80203
Given those, gcc only builds if we have the DevSDK ("headers at /" package)
installed. That package is being provided as a workaround for any projects
that fail to build without it (and note that GCC is the only project we are
aware of that falls into this category). In some future macOS version, it will
cease to be provided. I strongly encourage you to address those issues as soon
as possible to ensure that GCC continues to build with future versions.
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Subject: [Bug other/79885] --with-build-sysroot= does not get honored throughout the build (fix-includes, CPP, CXXCPP, configure-stage2)
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--- Comment #9 from Jeremy Huddleston Sequoia <jeremyhu at macports dot org> ---
Because of this issue, gcc only builds if we have the DevSDK ("headers at /"
package) installed. That package is being provided as a workaround for any
projects that fail to build without it (and note that GCC is the only project
we are aware of that falls into this category). In some future macOS version,
it will cease to be provided. I strongly encourage you to address this issue
as soon as possible to ensure that GCC continues to build with future versions.
>From gcc-bugs-return-615250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 09:57:25 2018
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Fri, 14 Sep 2018 10:24:00 -0000
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--- Comment #11 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
(In reply to Jeremy Huddleston Sequoia from comment #10)
> Given those, gcc only builds if we have the DevSDK ("headers at /" package)
> installed.
I may be misunderstanding what you say: GCC builds and runs fine without the
headers in /usr/include. At Homebrew, we are not recommending users to install
the /usr/include headers package, and we build and run GCC fine. The
configuration is the following
(https://github.com/Homebrew/homebrew-core/blob/master/Formula/gcc.rb):
--with-native-system-header-dir=/usr/include
--with-sysroot=/path/to/sdk
if the system headers are in /path/to/sdk/usr/include. Thus, on a Mojave
installation with Xcode CLT installed, we set /path/to/sdk to
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
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Subject: [Bug middle-end/86864] [9 Regression] ICE in commit_one_edge_insertion, at cfgrtl.c:2025 since r261795
Date: Fri, 14 Sep 2018 10:29:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-615252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 10:29:54 2018
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Subject: [Bug tree-optimization/60165] "may be used uninitialized" warning with -O3 but not with -O2
Date: Fri, 14 Sep 2018 10:44:00 -0000
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--- Comment #18 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
OK, but then, this means that the first sentence of the -Wmaybe-uninitialized
documentation is incorrect. That's probably the "there exists" that is
problematic, because of the possible difference of what actually exists and
what the compiler sees.
>From gcc-bugs-return-615253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 10:44:06 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87301] New: [9 Regression] ICE: verify_gimple failed (error: statement marked for throw, but doesn't)
Date: Fri, 14 Sep 2018 11:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87301
Bug ID: 87301
Summary: [9 Regression] ICE: verify_gimple failed (error:
statement marked for throw, but doesn't)
Product: gcc
Version: 9.0
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gcc-9.0.0-alpha20180909 snapshot (r264185) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast, -Os) -fexceptions -fnon-call-exceptions
-fno-tree-vrp:
void
bl (int *be)
{
int lo;
{
int **ny;
if (*be == 0)
{
int ***k8 = &ny;
int uj = &lo;
for (;;)
if (***k8 == 0)
{
uj = !!(1 / 0) ? !(lo = 0) : 0;
(void) uj;
if (*ny == 0)
for (;;)
if (***k8 == 0)
{
}
for (lo = 0; lo < 2; ++lo)
{
}
}
}
}
}
% gcc-9.0.0-alpha20180909 -O2 -fexceptions -fnon-call-exceptions -fno-tree-vrp
-w -c cuhhf6tv.c
cuhhf6tv.c: In function 'bl':
cuhhf6tv.c:2:1: error: statement marked for throw, but doesn't
2 | bl (int *be)
| ^~
_13 = _9;
during GIMPLE pass: cunrolli
cuhhf6tv.c:2:1: internal compiler error: verify_gimple failed
0xcff91d verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-cfg.c:5422
0xbd715f execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1943
0xbd804e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/passes.c:1997
>From gcc-bugs-return-615254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 11:14:08 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83428] Static initialization and struct with constexpr ctor
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--- Comment #6 from Wolfgang Roehrl <wolfgang.roehrl@gi-de.com> ---
Hi Jonathan, I would like to draw your attention to my new comment on your
answer to my bug report.
Thank you,
W. Roehrl
(In reply to Jonathan Wakely from comment #4)
> (In reply to Aliaksei Kandratsenka from comment #3)
> > constructor is defined after variable in this example. I am not sure this
> > real bug.
>
> Agreed. If we use Clang and add its require_constant_initialization
> attribute to the variable definition it tells us:
>
> 83428.cc:20:54: error: variable does not have a constant initializer
> __attribute__((require_constant_initialization)) S2 objX;
> ^~~~
> 83428.cc:20:17: note: required by 'require_constant_initialization'
> attribute here
> __attribute__((require_constant_initialization)) S2 objX;
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 83428.cc:12:7: note: undefined constructor 'S1' cannot be used in a constant
> expression
> : m_tabS1()
> ^
> 83428.cc:20:54: note: in call to 'S2()'
> __attribute__((require_constant_initialization)) S2 objX;
> ^
> 83428.cc:3:15: note: declared here
> constexpr S1 ();
> ^
> 1 error generated.
>
>
> If the S1::S1() constructor is defined before the definition of objX then
> Clang doesn't warn and GCC doesn't use dynamic initialization.
>From gcc-bugs-return-615255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 11:16:01 2018
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Subject: [Bug target/87302] New: -mfpu=auto -march=armv8-a does not work
Date: Fri, 14 Sep 2018 12:05:00 -0000
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Bug ID: 87302
Summary: -mfpu=auto -march=armv8-a does not work
Product: gcc
Version: 8.2.1
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i think the following inconsistency is problematic:
on a hard float toolchain (-mfloat-abi=hard):
$ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv7-a a.c ; echo $?
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
1
$ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv7-a+fp a.c ; echo $?
0
$ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a a.c ; echo $?
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
1
$ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a+fp a.c ; echo $?
arm-none-linux-gnueabihf-gcc: error: 'armv8-a' does not support feature 'fp'
arm-none-linux-gnueabihf-gcc: note: valid feature names are: crc simd crypto
nocrypto nofp; did you mean 'nofp'?
1
$ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a+simd a.c ; echo $?
0
so it seems neither armv8-a nor armv8-a+fp work with -mfpu=auto, but
armv8-a+simd and armv7-a+fp do.
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Subject: [Bug middle-end/87298] [9 Regression] FAIL: gcc.c-torture/execute/pr87053.c
Date: Fri, 14 Sep 2018 12:19:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
r264301 works now.
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Subject: [Bug tree-optimization/87303] New: DFmode FP constants are not correctly truncated when promoted to XFmode
Date: Fri, 14 Sep 2018 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87303
Bug ID: 87303
Summary: DFmode FP constants are not correctly truncated when
promoted to XFmode
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
I was looking at the following testsuite failure with
-fexcess-precision=standard on 32bit x86 target:
FAIL: gcc.c-torture/execute/ieee/acc1.c execution
--cut here--
double func (const double *array)
{
double d = *array;
if (d == 0.0)
return d;
else
return d + func (array + 1);
}
int main ()
{
double values[] = { 0.1e-100, 1.0, -1.0, 0.0 };
if (func (values) != 0.1e-100)
abort ();
exit (0);
}
--cut here--
gcc -O2 -fexcess-precision=standard -m32 creates following optimized tree dump:
--cut here--
<bb 2> [local count: 1073741824]:
values[0] = 1.00000000000000005171617276904849891057306773641595375548e-101;
values[1] = 1.0e+0;
values[2] = -1.0e+0;
values[3] = 0.0;
_9 = func (&MEM[(void *)&values + 8B]);
_10 = (long double) _9;
_11 = _10 + 1.00000000000000005171617276904849891057306773641595375548e-101;
_12 = (double) _11;
_1 = (long double) _12;
if (_1 != 9.9999999999999999997834478666160678572417847571029307194e-102)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
abort ();
<bb 4> [local count: 1073312328]:
exit (0);
--cut here--
Please note that the last compare is with XFmode constant that is not correctly
truncated to DFmode. The comparison in extended to XFmode (due to
-fexcess-precision=standard option), but the constant is not truncated to
DFmode value, even if it is alter loaded via XFmode load instruction.
(gdb) disass
Dump of assembler code for function main:
0x08048350 <+0>: lea 0x4(%esp),%ecx
...
0x08048384 <+52>: call 0x80484e0 <func>
0x08048389 <+57>: faddl 0x80485c0
0x0804838f <+63>: add $0x10,%esp
0x08048392 <+66>: fstpl -0x30(%ebp)
0x08048395 <+69>: fldt 0x80485d0
0x0804839b <+75>: fldl -0x30(%ebp)
=> 0x0804839e <+78>: fucompp
0x080483a0 <+80>: fnstsw %ax
0x080483a2 <+82>: sahf
0x080483a3 <+83>: jp 0x80483b1 <main+97>
0x080483a5 <+85>: jne 0x80483b1 <main+97>
0x080483a7 <+87>: sub $0xc,%esp
0x080483aa <+90>: push $0x0
0x080483ac <+92>: call 0x8048320 <exit@plt>
0x080483b1 <+97>: call 0x8048340 <abort@plt>
End of assembler dump.
(gdb) i r flo
st0 1.00000000000000005172e-101 (raw 0x3eafb32df8e9f3546800)
st1 9.99999999999999999978e-102 (raw 0x3eafb32df8e9f3546564)
st2 0 (raw 0x00000000000000000000)
st3 0 (raw 0x00000000000000000000)
st4 0 (raw 0x00000000000000000000)
st5 0 (raw 0x00000000000000000000)
st6 0 (raw 0x00000000000000000000)
st7 0 (raw 0x00000000000000000000)
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Subject: [Bug tree-optimization/87303] DFmode FP constants are not correctly truncated when promoted to XFmode
Date: Fri, 14 Sep 2018 12:36:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Also fails with -O2 -fexcess-precision=standard -mfpmath=387 on 64bit target.
>From gcc-bugs-return-615259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 12:36:11 2018
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
Date: Fri, 14 Sep 2018 12:52:00 -0000
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--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44692
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44692&action=edit
patch that does not help
The attached patch changes the partition view so that members of bases are
adjacent. This should improve the locality of the initial conflict set
bits (we only record conflicts within same base variables).
This doesn't help memory usage for either testcase.
For the 2nd testcase we have 187988 partitions and 500 bases.
The conflict bitmaps still end up very sparse (but large). There are also
a lot of duplicate bitmaps (if you'd add self-conflicts).
Restricting anonymous coalesces to abnormal coalescing only increases the
number of bases to 747 and doesn't help memory use significantly.
There may be cases where the patch helps since it should improve locality.
>From gcc-bugs-return-615260-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 12:52:42 2018
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Subject: [Bug target/87302] -mfpu=auto -march=armv8-a does not work
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to nsz from comment #0)
> i think the following inconsistency is problematic:
>
> on a hard float toolchain (-mfloat-abi=hard):
>
> $ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv7-a a.c ; echo $?
> cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
> 1
This is the correct response, you haven't specified the expected floating
point/simd extensions in the architecture.
> $ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv7-a+fp a.c ; echo $?
> 0
correct response.
> $ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a a.c ; echo $?
> cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
> 1
Correct response, floating point/simd extension not enabled.
> $ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a+fp a.c ; echo $?
> arm-none-linux-gnueabihf-gcc: error: 'armv8-a' does not support feature 'fp'
> arm-none-linux-gnueabihf-gcc: note: valid feature names are: crc simd crypto
> nocrypto nofp; did you mean 'nofp'?
> 1
Correct response. Fp without SIMD is not an option in Arm v8.
> $ arm-none-linux-gnueabihf-gcc -mfpu=auto -march=armv8-a+simd a.c ; echo $?
> 0
>
> so it seems neither armv8-a nor armv8-a+fp work with -mfpu=auto, but
> armv8-a+simd and armv7-a+fp do.
this is all as it should be. The documentation describes which options are
available for which architecture.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #22)
> Created attachment 44692 [details]
> patch that does not help
>
> The attached patch changes the partition view so that members of bases are
> adjacent. This should improve the locality of the initial conflict set
> bits (we only record conflicts within same base variables).
>
> This doesn't help memory usage for either testcase.
>
> For the 2nd testcase we have 187988 partitions and 500 bases.
>
> The conflict bitmaps still end up very sparse (but large). There are also
> a lot of duplicate bitmaps (if you'd add self-conflicts).
>
> Restricting anonymous coalesces to abnormal coalescing only increases the
> number of bases to 747 and doesn't help memory use significantly.
So doing this^^^ more conservatively somehow, choosing different bases for
different set of final coalesced abnormal partitions, would shrink the
size of the largest base significantly, reducing the quadraticness.
So perform the abnormal part of coalesce_partitions implicitely, computing
sets of coalesced partitions and pre-assigning a base to each of them.
The only complication is in rejecting further coalescing to the base
members (thus adjusting gimple_can_coalesce_p).
> There may be cases where the patch helps since it should improve locality.
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Subject: [Bug c/87297] [9 Regression] ICE on strncpy with an undeclared argument
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/87296] [8/9 Regression] -Wstringop-overflow false positive due to bogus MEM_REF type
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> Confirmed with the simplified C test case below. The warning sees a MEM_REF
> (char[4], ...) as the destination of the strncpy call. Why the type is
> char[4] is a mystery to me. I guess the type in MEM_REF really can't be
> trusted.
>
>
> gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout pr87296.c
>
> ;; Function g (g, funcdef_no=0, decl_uid=1913, cgraph_uid=1, symbol_order=0)
>
> g (struct S * p, const char * s)
> {
> void * _1;
> char[4] * _2;
>
> <bb 2> [local count: 1073741824]:
> _1 = &MEM[(void *)p_3(D) + 4B];
> _2 = &p_3(D)->a;
> f (_2, _1);
> __builtin_strncpy (_1, s_6(D), 6); [tail call]
> return;
>
> }
>
>
> pr87296.c: In function ‘g’:
> pr87296.c:11:3: warning: ‘__builtin_strncpy’ writing 6 bytes into a region
> of size 4 overflows the destination [-Wstringop-overflow=]
> 11 | __builtin_strncpy (p->b, s, sizeof p->b);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
quite likely because
char[4] * _1;
const char * _2;
...
_1 = &c_8->ids;
_2 = _1 + 4;
and forwprop combines the address calculation, re-using the type of _1.
For IL consistency if the ADDR_EXPR has type char[4] * then its operand
has to have type char[4]. [that's GENERIC constraints]
/* Technically there is no longer a need for matching types, but
gimple hygiene asks for this check. In LTO we can end up
combining incompatible units and thus end up with addresses
of globals that change their type to a common one. */
if (!in_lto_p
&& !types_compatible_p (TREE_TYPE (op),
TREE_TYPE (TREE_TYPE (rhs1)))
&& !one_pointer_to_useless_type_conversion_p (TREE_TYPE (rhs1),
TREE_TYPE (op)))
{
error ("type mismatch in address expression");
debug_generic_stmt (TREE_TYPE (rhs1));
debug_generic_stmt (TREE_TYPE (op));
return true;
}
other than that - types on addresses are random.
>From gcc-bugs-return-615264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 13:11:47 2018
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Subject: [Bug tree-optimization/87301] [9 Regression] ICE: verify_gimple failed (error: statement marked for throw, but doesn't)
Date: Fri, 14 Sep 2018 13:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87301
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-14
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug tree-optimization/87259] [9 Regression] ICE: error: definition in block 3 does not dominate use in block 2
Date: Fri, 14 Sep 2018 13:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87259
--- Comment #3 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Sep 14 13:13:14 2018
New Revision: 264312
URL: https://gcc.gnu.org/viewcvs?rev=264312&root=gcc&view=rev
Log:
[tree-ssa-mathopts] PR tree-optimization/87259: Call execute_cse_reciprocals_1
before trying optimize_recip_sqrt
PR tree-optimization/87259
PR lto/87283
(pass_cse_reciprocals::execute): Run optimize_recip_sqrt after
execute_cse_reciprocals_1 has tried transforming.
PR tree-optimization/87259
* gcc.dg/pr87259.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87259.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
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Subject: [Bug lto/87283] [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
Date: Fri, 14 Sep 2018 13:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87283
--- Comment #4 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Sep 14 13:13:14 2018
New Revision: 264312
URL: https://gcc.gnu.org/viewcvs?rev=264312&root=gcc&view=rev
Log:
[tree-ssa-mathopts] PR tree-optimization/87259: Call execute_cse_reciprocals_1
before trying optimize_recip_sqrt
PR tree-optimization/87259
PR lto/87283
(pass_cse_reciprocals::execute): Run optimize_recip_sqrt after
execute_cse_reciprocals_1 has tried transforming.
PR tree-optimization/87259
* gcc.dg/pr87259.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87259.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
>From gcc-bugs-return-615267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 13:14:19 2018
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Subject: [Bug tree-optimization/87259] [9 Regression] ICE: error: definition in block 3 does not dominate use in block 2
Date: Fri, 14 Sep 2018 13:14:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from ktkachov at gcc dot gnu.org ---
Fixed.
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Subject: [Bug lto/87283] [9 Regression] internal compiler error: in remove, at alloc-pool.h:433
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ktkachov at gcc dot gnu.org changed:
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--- Comment #5 from ktkachov at gcc dot gnu.org ---
Fixed.
>From gcc-bugs-return-615270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 13:36:08 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87305] New: [9 Regression] Segfault in end_hard_regno in setup_live_pseudos_and_spill_after_risky_transforms on aarch64 big-endian
Date: Fri, 14 Sep 2018 13:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87305
Bug ID: 87305
Summary: [9 Regression] Segfault in end_hard_regno in
setup_live_pseudos_and_spill_after_risky_transforms on
aarch64 big-endian
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
CC: rsandifo at gcc dot gnu.org
Target Milestone: ---
The testcase:
int a;
int b[5];
int fn1() {
short c;
a = 0;
for (; a <= 4; a++) {
c = 3;
for (; c >= 0; c--) {
if (b[c + 1])
break;
--b[c];
}
}
return a;
}
ICEs with -Ofast -mbig-endian on aarch64
test.c:15:1: internal compiler error: Segmentation fault
15 | }
| ^
0xc310b1 crash_signal
$GCC/gcc/toplev.c:325
0xa87998 end_hard_regno
$GCC/gcc/regs.h:266
0xa87998 add_to_hard_reg_set
$GCC/gcc/regs.h:278
0xa87998 setup_live_pseudos_and_spill_after_risky_transforms
$GCC/gcc/lra-assigns.c:1219
0xa87998 lra_assign(bool&)
$GCC/gcc/lra-assigns.c:1617
0xa83da4 lra(_IO_FILE*)
$GCC/gcc/lra.c:2508
0xa3b3d6 do_reload
$GCC/gcc/ira.c:5469
0xa3b3d6 execute
$GCC/gcc/ira.c:5653
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
This seems to be due to a subreg being involved in a vector operation.
My patch[1] to disable paradoxical subregs during vector initialisation in
aarch64 "fixes" the ICE but it was not applied as it was just papering over a
problem in the midend.
[1] https://gcc.gnu.org/ml/gcc-patches/2018-05/msg01635.html
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87304] New: [9 regression] gcc.dg/vect/bb-slp-over-widen-1.c fails starting with r262371
Date: Fri, 14 Sep 2018 13:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87304
Bug ID: 87304
Summary: [9 regression] gcc.dg/vect/bb-slp-over-widen-1.c fails
starting with r262371
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
Looks like the fix for pr86405 broke things on powerpc64 targeting power 6 and
power 7. These were run on a power 7 BE machine:
testgcc: Tried 262370
# of expected passes 8
-================================-
testgcc: Tried 262371
# of expected passes 8
# of unexpected failures 2
-================================-
testgcc: make -k check-gcc
RUNTESTFLAGS=vect.exp=gcc.dg/vect/bb-slp-over-widen-1.c
FAIL: gcc.dg/vect/bb-slp-over-widen-1.c scan-tree-dump-times slp2 "basic block
vectorized" 2
FAIL: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects
scan-tree-dump-times slp2 "basic block vectorized" 2
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-over-widen-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -maltivec -mvsx
-mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-slp-details -lm -o ./bb-slp-over-widen-1.exe (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-over-widen-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -maltivec -mvsx
-mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-slp-details -lm -o ./bb-slp-over-widen-1.exe
PASS: gcc.dg/vect/bb-slp-over-widen-1.c (test for excess errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.2.0/lib64
Execution timeout is: 300
spawn [open ...]
PASS: gcc.dg/vect/bb-slp-over-widen-1.c execution test
PASS: gcc.dg/vect/bb-slp-over-widen-1.c scan-tree-dump slp2 "demoting int to
signed short"
PASS: gcc.dg/vect/bb-slp-over-widen-1.c scan-tree-dump slp2 "demoting int to
unsigned short"
gcc.dg/vect/bb-slp-over-widen-1.c: pattern found 0 times
FAIL: gcc.dg/vect/bb-slp-over-widen-1.c scan-tree-dump-times slp2 "basic block
vectorized" 2
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-over-widen-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mvsx -mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-slp-details -lm -o ./bb-slp-over-widen-1.exe
(timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-over-widen-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mvsx -mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-slp-details -lm -o ./bb-slp-over-widen-1.exe
PASS: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects (test for
excess errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.2.0/lib64
Execution timeout is: 300
spawn [open ...]
PASS: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects execution test
PASS: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects scan-tree-dump
slp2 "demoting int to signed short"
PASS: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects scan-tree-dump
slp2 "demoting int to unsigned short"
gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects : pattern found 0
times
FAIL: gcc.dg/vect/bb-slp-over-widen-1.c -flto -ffat-lto-objects
scan-tree-dump-times slp2 "basic block vectorized" 2
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect.exp completed
in 4 seconds
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Subject: [Bug rtl-optimization/87305] [9 Regression] Segfault in end_hard_regno in setup_live_pseudos_and_spill_after_risky_transforms on aarch64 big-endian
Date: Fri, 14 Sep 2018 13:38:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.2.1
Version|unknown |9.0
Target Milestone|--- |9.0
Known to fail| |9.0
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Subject: [Bug c++/87300] -Wredundant-move gives false positives in C++11 mode
Date: Fri, 14 Sep 2018 13:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87300
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's a DR, so it applies to previous standards too. That's the rule GCC always
follows. We do not implement defective standards, we implement the fixes. A
pedantic conformance to a specification known to be defective is not useful.
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Subject: [Bug c++/87300] -Wredundant-move gives false positives in C++11 mode
Date: Fri, 14 Sep 2018 15:01:00 -0000
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--- Comment #2 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
Hm, am I misunderstanding it? It said “Status: C++14â€. Even so, does it apply
to C++11?
>From gcc-bugs-return-615274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 15:01:16 2018
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/87306] New: test case gcc.dg/vect/bb-slp-pow-1.c fails with its introduction in r263290
Date: Fri, 14 Sep 2018 15:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87306
Bug ID: 87306
Summary: test case gcc.dg/vect/bb-slp-pow-1.c fails with its
introduction in r263290
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
Saw this on power7 BE targeting power7
testgcc: Tried 263290
testgcc: make -k check-gcc RUNTESTFLAGS=vect.exp=gcc.dg/vect/bb-slp-pow-1.c
-================================-
testgcc: 263290 had unexpected test case failures
testgcc: results of test run:
# of expected passes 4
# of unexpected failures 2
FAIL: gcc.dg/vect/bb-slp-pow-1.c scan-tree-dump-times slp2 "basic block
vectorized" 1
FAIL: gcc.dg/vect/bb-slp-pow-1.c -flto -ffat-lto-objects scan-tree-dump-times
slp2 "basic block vectorized" 1
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -maltivec -mvsx
-mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-slp-details -fno-math-errno -fdisable-tree-sincos -lm -o
./bb-slp-pow-1.exe (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -maltivec -mvsx
-mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-slp-details -fno-math-errno -fdisable-tree-sincos -lm -o
./bb-slp-pow-1.exe
cc1: note: disable pass tree-sincos for functions in the range of [0,
4294967295]
PASS: gcc.dg/vect/bb-slp-pow-1.c (test for excess errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.2.0/lib64
Execution timeout is: 300
spawn [open ...]
PASS: gcc.dg/vect/bb-slp-pow-1.c execution test
gcc.dg/vect/bb-slp-pow-1.c: pattern found 0 times
FAIL: gcc.dg/vect/bb-slp-pow-1.c scan-tree-dump-times slp2 "basic block
vectorized" 1
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mvsx -mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-slp-details -fno-math-errno -fdisable-tree-sincos
-lm -o ./bb-slp-pow-1.exe (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mvsx -mno-allow-movmisalign -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-slp-details -fno-math-errno -fdisable-tree-sincos
-lm -o ./bb-slp-pow-1.exe
cc1: note: disable pass tree-sincos for functions in the range of [0,
4294967295]
lto1: note: disable pass tree-sincos for functions in the range of [0,
4294967295]
lto1: note: disable pass tree-sincos for functions in the range of [0,
4294967295]
PASS: gcc.dg/vect/bb-slp-pow-1.c -flto -ffat-lto-objects (test for excess
errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.2.0/lib64
Execution timeout is: 300
spawn [open ...]
PASS: gcc.dg/vect/bb-slp-pow-1.c -flto -ffat-lto-objects execution test
gcc.dg/vect/bb-slp-pow-1.c -flto -ffat-lto-objects : pattern found 0 times
FAIL: gcc.dg/vect/bb-slp-pow-1.c -flto -ffat-lto-objects scan-tree-dump-times
slp2 "basic block vectorized" 1
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect.exp completed
in 10 seconds
=== gcc Summary ===
# of expected passes 4
# of unexpected failures 2
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Subject: [Bug target/85628] Make better use of BFI (BFXIL)
Date: Fri, 14 Sep 2018 15:25:00 -0000
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--- Comment #3 from samtebbs at gcc dot gnu.org ---
Author: samtebbs
Date: Fri Sep 14 15:16:17 2018
New Revision: 264315
URL: https://gcc.gnu.org/viewcvs?rev=264315&root=gcc&view=rev
Log:
[Aarch64] Added pattern to match zero extended bfxil
gcc/
2018-07-31 Sam Tebbs <sam.tebbs@arm.com>
PR target/85628
* config/aarch64/aarch64.md (*aarch64_bfxilsi_uxtw): Define.
gcc/testsuite
2018-07-31 Sam Tebbs <sam.tebbs@arm.com>
PR target/85628
* gcc.target/aarch64/combine_bfxil.c (combine_zero_extended_int, foo6):
New functions.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
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Subject: [Bug target/87224] ICE in extract_constrain_insn, at recog.c:2206
Date: Fri, 14 Sep 2018 15:39:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Sep 14 15:24:47 2018
New Revision: 264316
URL: https://gcc.gnu.org/viewcvs?rev=264316&root=gcc&view=rev
Log:
rs6000: Add another Z to go with Y (PR87224)
This is another case where we ICE because Y does not allow reg+reg, we
need Z for that.
PR target/87224
* config/rs6000/rs6000.md (*mov<mode>_hardfloat64): Add Z to the Y
alternatives.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
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Subject: [Bug c/87307] New: Implicit conversion from int to vector works, explicit is an error
Date: Fri, 14 Sep 2018 15:46:00 -0000
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Bug ID: 87307
Summary: Implicit conversion from int to vector works, explicit
is an error
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Vector types defined using __attribute((vector_size(N))) supports implicit
conversion from int to vector type for arithmetic operators. However when you
try to perform explicit conversion, you will gen an error. Please add support
for explicit conversion from int to vector type, it would be handy.
typedef int VInt __attribute((vector_size(32)));
VInt test1(VInt v)
{
return v + 2; // OK
}
VInt test2(VInt v)
{
return v + (VInt)2; // error: can't convert a value of type 'int' to vector
type 'VInt' {aka '__vector(8) int'} which has different size
}
VInt test3(VInt v)
{
VInt v2(2); // error: cannot convert 'int' to 'VInt' {aka '__vector(8)
int'} in initialization
return v + v2;
}
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Subject: [Bug c/87307] Implicit conversion from int to vector works, explicit is an error
Date: Fri, 14 Sep 2018 15:49:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>However when you try to perform explicit conversion, you will gen an error.
Right there is another reason why we don't want to support that is because we
support bitwise conversion between vector types and integer types of the same
size. For an example:
uint64_t a;
__attribute__((vector_size(sizeof(uint64_t) ) )) uint16_t b = (uint64_t)a;
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Subject: [Bug c/87307] Implicit conversion from int to vector works, explicit is an error
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is by design.
https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc/Vector-Extensions.html#Vector-Extensions
For convenience, it is allowed to use a binary vector operation where one
operand is a scalar. In that case the compiler transforms the scalar operand
into a vector where each element is the scalar from the operation. The
transformation happens only if the scalar could be safely converted to the
vector-element type.
--- CUT ---
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Subject: [Bug debug/87308] New: pretty printer for std::any fails with: Python Exception <type 'exceptions.ValueError'> Unknown manager function in std::any
Date: Fri, 14 Sep 2018 15:52:00 -0000
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Bug ID: 87308
Summary: pretty printer for std::any fails with: Python
Exception <type 'exceptions.ValueError'> Unknown
manager function in std::any
Product: gcc
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Using g++-8.1 and gdb-8.2 both built from source on a CentOS 7.3 host, pretty
printing a std::any fails with an exception for unknown manager function.
$ gdb ./erased-lambda
GNU gdb (GDB) 8.2
(gdb) run
Starting program: .../erased-lambda
Program received signal SIGILL, Illegal instruction.
main () at erased-lambda.cpp:6
6 __builtin_trap();
(gdb) print a1
$1 = Python Exception <type 'exceptions.ValueError'> Unknown manager
function in std::any:
Python Exception <type 'exceptions.ValueError'> Unknown manager function in
std::any:
{
_M_manager = 0x4007b2 <std::any::_Manager_internal<main()::<lambda()>
>::_S_manage(std::any::_Op, const std::any *, std::any::_Arg *)>, _M_storage =
{_M_ptr = 0x1, _M_buffer = {__data = "\001\000\000\000\000\000\000",
__align = {<No data fields>}}}}
It would appear that the printer attempts to match the manager function name
with the following regex:
rx = r"""({0}::_Manager_\w+<.*>)::_S_manage\({0}::_Op, {0} const\*,
{0}::_Arg\*\)""".format(typename)
Note that the second argument as printed by my gdb is 'const std::any *' versus
the regex 'std::any const*' (east vs west const and space before *) and the
third argument as printed by gdb is 'std::any::_Arg *' versus the regex
'std::any::_Arg*' (space before *). Applying the following patch "fixed" the
regex for my particular set of versions:
--- a/printers.py
+++ b/printers.py
@@ -1040,7 +1040,7 @@ class StdExpAnyPrinter(SingleObjContainerPrinter):
func =
gdb.block_for_pc(int(mgr.cast(gdb.lookup_type('intptr_t'))))
if not func:
raise ValueError("Invalid function pointer in %s" %
self.typename)
- rx = r"""({0}::_Manager_\w+<.*>)::_S_manage\({0}::_Op, {0}
const\*, {0}::_Arg\*\)""".format(typename)
+ rx = r"""({0}::_Manager_\w+<.*>)::_S_manage\({0}::_Op, const
{0} \*, {0}::_Arg \*\)""".format(typename)
m = re.match(rx, func.function.name)
if not m:
raise ValueError("Unknown manager function in %s" %
self.typename)
However, even with that applied, pretty printing a lambda prints the wrong type
due to a bad type lookup:
(gdb) print a1
$1 = std::any containing <lambda()> = {[contained value] = {__j = 1, __k =
0}}
(gdb) print a2
$2 = std::any containing <lambda()> = {[contained value] = {__j = 2, __k =
3}}
Note that both a1 and a2 are interpreted as holding type main::{lambda()#2},
but a1 actually holds main::{lambda()#1}.
GCC version:
$ g++-8.1 -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-8.1.0/bin/g++-8.1
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.1.0/libexec/gcc/x86_64-pc-linux-gnu/8.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-8.1.0/configure --program-suffix=-8.1
--prefix=/usr/local/gcc-8.1.0 --disable-multilib --enable-gold --enable-ld
--enable-lto
Thread model: posix
gcc version 8.1.0 (GCC)
Please let me know if I can provide anything else to help.
== erased-lambda.cpp ==
// g++-8.1 -g -std=c++17 erased-lambda.cpp -o erased-lambda
#include <any>
int main() {
std::any a1 = [i=1] {};
std::any a2 = [j=2,k=3] {};
__builtin_trap();
}
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Subject: [Bug target/87224] ICE in extract_constrain_insn, at recog.c:2206
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Sep 14 15:52:23 2018
New Revision: 264320
URL: https://gcc.gnu.org/viewcvs?rev=264320&root=gcc&view=rev
Log:
Backport PR87224 fix to 8
Backport from trunk
2018-09-14 Segher Boessenkool <segher@kernel.crashing.org>
PR target/87224
* config/rs6000/rs6000.md (*mov<mode>_hardfloat64): Add Z to the Y
alternatives.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.md
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Subject: [Bug target/87224] ICE in extract_constrain_insn, at recog.c:2206
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.3
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Patch committed, and backported to 8. Fixed.
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Subject: [Bug tree-optimization/87309] New: Spurious note: messages when building with -fopt-info-vec-optimized
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87309
Bug ID: 87309
Summary: Spurious note: messages when building with
-fopt-info-vec-optimized
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: iii at linux dot ibm.com
Target Milestone: ---
$ cat test.cpp
void a() {}
$ g++ -c test.cpp -fopt-info-vec-optimized -O3
test.cpp:1:6: note: test.cpp:1:11: note:
This is coming from DUMP_VECT_SCOPE ("vect_analyze_data_refs"); in
vect_analyze_data_refs(). I suspect that alt_flags check around dump_loc call
is missing in dump_context::begin_scope.
>From gcc-bugs-return-615284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 16:41:48 2018
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Subject: [Bug c++/61941] Mis-parsing of warn_unused_result function with ref-qualifiers
Date: Fri, 14 Sep 2018 16:49:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|NEW |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |7.3.0, 8.2.0, 9.0
Resolution|--- |FIXED
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
This was fixed in GCC 7 by r241831:
r241831 | jason | 2016-11-03 15:52:58 -0400 (Thu, 03 Nov 2016) | 12 lines
Use type_hash_eq langhook in check_qualified_type.
gcc/
* tree.c (check_lang_type): New.
(check_qualified_type): Use it.
(check_aligned_type): Use it.
* tree.h: Declare it.
gcc/cp/
* tree.c (cp_check_qualified_type): Call check_base_type instead
of check_qualified_type.
(cxx_type_hash_eq): Check ref-qualifiers.
* typeck.c (apply_memfn_quals): No need to mess with TYPE_CANONICAL.
>From gcc-bugs-return-615285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 16:49:07 2018
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Subject: [Bug c/62194] Add deadfield attribute to ignore initializers for a structure field
Date: Fri, 14 Sep 2018 17:02:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Josh Triplett from comment #0)
>
> I'm willing to work on a patch for this.
If there still is interest in this feature are you still interested in working
on a patch? (If so, please assign the bug to yourself and post the patch to
gcc-patches.)
>From gcc-bugs-return-615286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:02:14 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87309] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Fri, 14 Sep 2018 17:03:00 -0000
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Ilya Leoshkevich <iii at linux dot ibm.com> changed:
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--- Comment #1 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Created attachment 44693
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44693&action=edit
patch
This fixes the problem for me, but I'm not sure if this is the right solution.
>From gcc-bugs-return-615287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:03:26 2018
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From: "josh at joshtriplett dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/62194] Add deadfield attribute to ignore initializers for a structure field
Date: Fri, 14 Sep 2018 17:04:00 -0000
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--- Comment #5 from Josh Triplett <josh at joshtriplett dot org> ---
(In reply to Martin Sebor from comment #4)
> (In reply to Josh Triplett from comment #0)
> >
> > I'm willing to work on a patch for this.
>
> If there still is interest in this feature are you still interested in
> working on a patch? (If so, please assign the bug to yourself and post the
> patch to gcc-patches.)
I'm still interested in this; I was hoping to get some confirmation that the
overall approach seems reasonable before starting on a patch.
Does the concept of __attribute__((deadfield)) seem reasonable? If so, I'd be
happy to develop a patch for this.
>From gcc-bugs-return-615288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:04:51 2018
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Subject: [Bug sanitizer/62307] -fsanitize=undefined doesn't pay attention to __attribute__((returns_nonnull))
Date: Fri, 14 Sep 2018 17:08:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I would have expected to be able to suppress the null checks in the caller with
the no_sanitize attribute on the declaration of the called function but it
seems that the attribute applies to the function definition and doesn't affect
its callers. (Whether that's how it's meant to work isn't clear from the
manual.) So with that I'll confirm this request. It seems to me that it
should be possible to avoid these checks, either with the no_sanitize
attribute, or under some new option.
>From gcc-bugs-return-615289-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:08:38 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87303] DFmode FP constants are not correctly truncated when promoted to XFmode
Date: Fri, 14 Sep 2018 17:19:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I don't see a bug here. Excess precision semantics mean that the
comparison is effectively with 0.1e-100L (whereas the array initializer is
(double) 0.1e-100L). If you use "!= (double) 0.1e-100" in the test - add
a cast of the constant to double - then it should pass with
-fexcess-precision=standard.
>From gcc-bugs-return-615290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:19:35 2018
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Subject: [Bug c++/63459] operator new and returns_nonnull
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
With GCC 7 and later the null test is eliminated by EVRP. Is that early enough
(and can this request be resolved)?
>From gcc-bugs-return-615291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:22:31 2018
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From: "kohanyi.robert at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87310] New: -Wc90-c99-compat does not warn about bool usage
Date: Fri, 14 Sep 2018 17:23:00 -0000
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Bug ID: 87310
Summary: -Wc90-c99-compat does not warn about bool usage
Product: gcc
Version: 8.1.1
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Created attachment 44694
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44694&action=edit
gcc -v outputs
When compiling code that uses <stdbool.h> and bool declarations with
-Wc90-c99-compat (with or without -std=c90), no diagnostic is issued.
Something like this
#include <stdio.h>
#include <stdbool.h>
main() {
bool ok = true;
printf("%u\n", ok);
}
when compiled with
gcc -std=c90 -Wc90-c99-compat a.c
there's no warning, but I expected a warn about bool usage.
When it looks like this
#include <stdio.h>
main() {
_Bool ok = 1;
printf("%u\n", ok);
}
the warning `warning: ISO C90 does not support boolean types
[-Wc90-c99-compat]' is raised.
Tried with multiple version of gcc. Attached the output of different gcc -v
runs.
Try it here at tio.run: https://bit.ly/2CXnvXm
StackOverflow thread: https://stackoverflow.com/questions/52307780
>From gcc-bugs-return-615292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:23:40 2018
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
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--- Comment #1 from Róbert Kohányi <kohanyi.robert at gmail dot com> ---
Created attachment 44695
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44695&action=edit
a.c preprocessed version
>From gcc-bugs-return-615293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:29:40 2018
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Subject: =?UTF-8?B?W0J1ZyBjKysvNjM2NTBdIGNvbmZsaWN0aW5nIHR5cGUgYXR0cmlidXRlcyBz?= =?UTF-8?B?cGVjaWZpZWQgZm9yIOKAmHZpcnR1YWwuLic=?Date: Fri, 14 Sep 2018 17:34:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Is this still a problem with recent versions of GCC? If so, can you please
post your final test case and the compiler output and fill in the Target field
(see the line starting with Target: in GCC's output with the -v option).
>From gcc-bugs-return-615294-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:34:02 2018
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Subject: [Bug c/64862] printf attribute should accept other string types
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Any progress?
>From gcc-bugs-return-615295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:39:12 2018
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Subject: [Bug c++/65055] Types and variables differ in handling of multiple instances of attribute aligned
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the top of trunk (GCC 9).
>From gcc-bugs-return-615296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:43:36 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/77696] Confusing wording for -Wformat-overflow
Date: Fri, 14 Sep 2018 17:50:00 -0000
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--- Comment #17 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Prototype of a new approach posted here:
"[PATCH 0/5] RFC: gimple-ssa-sprintf.c: a new approach (PR middle-end/77696)"
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00771.html
>From gcc-bugs-return-615297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 17:50:48 2018
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Subject: [Bug c/65115] default init_priority attribute
Date: Fri, 14 Sep 2018 18:00:00 -0000
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The latest documentation reads:
@item init_priority (@var{priority})
@cindex @code{init_priority} variable attribute
In Standard C++, objects defined at namespace scope are guaranteed to be
initialized in an order in strict accordance with that of their definitions
@emph{in a given translation unit}. No guarantee is made for initializations
across translation units. However, GNU C++ allows users to control the
order of initialization of objects defined at namespace scope with the
@code{init_priority} attribute by specifying a relative @var{priority},
a constant integral expression currently bounded between 101 and 65535
inclusive. Lower numbers indicate a higher priority.
In the following example, @code{A} would normally be created before
@code{B}, but the @code{init_priority} attribute reverses that order:
@smallexample
Some_Class A __attribute__ ((init_priority (2000)));
Some_Class B __attribute__ ((init_priority (543)));
@end smallexample
>From gcc-bugs-return-615298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 18:00:49 2018
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Subject: [Bug c/65158] printf attribute error reporting assumes single-byte characters
Date: Fri, 14 Sep 2018 18:09:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
There is no format specifier in C or POSIX that involves a multibyte character.
They're all single byte characters in the 7-bit ASCII range that should
convert to single byte characters in most (all?) encodings. It would take an
unusual character set to map a 7-bit character to a multibyte sequence. Is it
worth worrying about this corner case?
(-Wformat doesn't currently handle the -fexec-charset= option so that should
presumably be a higher priority problem to fix.)
>From gcc-bugs-return-615299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 18:09:00 2018
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Subject: [Bug c/68039] Incorrect unused-result warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2015-10-22 00:00:00 |2018-9-14
CC| |msebor at gcc dot gnu.org
Known to fail| |5.3.0, 6.4.0, 7.3.0, 8.2.0,
| |9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reconfirming. No change in GCC 8 or 9.
>From gcc-bugs-return-615300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 18:20:10 2018
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Subject: [Bug c/68201] alloc_size attribute and memory pools
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Severity|normal |enhancement
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm also not sure I see how such an attribute/built-in could be used as
described. What might perhaps be useful is the ability to create an
association between a pointer and a size of the object it points to, e.g., like
so:
struct MemPool {
size_t block_size;
char pool[] __attribute__ ((alloc_size (block_size)));
};
This way, in cases when GCC could determine the (constant) value or range of
block_size it could use that value (or range) to detect buffer overflows.
I have no idea if this is something sufficiently common to justify the effort
it would take to add such an extension.
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Subject: [Bug c/68524] Please support attributes between function definition and opening brace
Date: Fri, 14 Sep 2018 18:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Clang also supports the syntax with a warning. Confirmed (I have no idea how
challenging it might be to implement). There also is a proposal to add the
standard C++ attribute syntax (e.g., [[gnu::const]]) to C. The C++ syntax
doesn't allow attributes there.
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
What do the contents of your <stdbool.h> look like?
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Subject: [Bug c/45780] Warning for arithmetic operations involving C99 _Bool variable
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #0)
> Pasted from the thread that introduced _Bool in place of "GCC bool":
>
> <quote>
>
> > >> It can be done ultimately, but as a prerequisite, we should have
> > >> warnings in -Wextra for all of
> > >>
> > >> ? boolvar++; ++boolvar;
> > >> ? boolvar--; --boolvar;
> > >> ? boolvar = nonbool;
> > >> ? boolvar & nonbool; boolvar &= nonbool;
> > >> ? boolvar | nonbool; boolvar |= nonbool;
> > >> ? boolvar ^ nonbool; boolvar ^= nonbool;
> > >
> > > Fair enough. I have CCed Manuel, perhaps he is interested in this warning.
> >
cc-ing him on this, too
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Subject: [Bug c/70082] Attribute ifunc marked functions should not be allowed to call other functions.
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Carlos, do you still feel diagnosing some of the [mis]uses would be helpful,
e.g., by a warning? (I ask because I've been doing some work in this area --
pr81824 -- and I might be able to take care of this at some point as well,
perhaps for GCC 10).
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Subject: [Bug c++/70382] Attribute not supported on bit-field declarations
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |8.2.0, 9.0
Resolution|--- |FIXED
Known to fail| |5.3.0, 6.4.0, 7.3.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This was fixed in GCC 8 via r253281:
r253281 | jakub | 2017-09-29 03:49:15 -0400 (Fri, 29 Sep 2017) | 8 lines
cp/
* parser.c (cp_parser_member_declaration): Parse attributes before
colon of a bitfield in addition to after colon.
testsuite/
* g++.dg/ext/bitfield7.C: New test.
* g++.dg/ext/bitfield8.C: New test.
* g++.dg/ext/bitfield9.C: New test.
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Subject: [Bug c++/70435] section attribute of a function template is not honored.
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.4.0, 7.3.0, 8.2.0,
| |9.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the top of trunk.
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Subject: [Bug c/68524] Please support attributes between function definition and opening brace
Date: Fri, 14 Sep 2018 19:17:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I believe the syntax in N2269 does allow [[]] attributes there (and
disallows them as prefixes on old-style parameters to avoid ambiguity) -
but they appertain to the function type (whereas the corresponding
position for GNU attributes - after the full declarator and any following
asm, before any initializer - appertains to the entity being declared).
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Subject: [Bug c++/87300] -Wredundant-move gives false positives in C++11 mode
Date: Fri, 14 Sep 2018 19:20:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes
The first published standard to include the change was C++14 but it's a DR
against the previous standard. That means it's fixing a bug in the previous
standard.
The -std=c++11 flag is documented to mean C++11 *plus amendments*.
Also, the point of the warning is to alert you to pessimised code, which is
definitely the case here. Without the std::move the code compiles and can elide
the move construction. With the std::move a new object must be constructed.
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From: "steinar+gcc at gunderson dot no" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87300] -Wredundant-move gives false positives in C++11 mode
Date: Fri, 14 Sep 2018 19:23:00 -0000
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--- Comment #4 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
Wait, can it elide the move even if it's a conversion? How could that work in
the general case?
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Subject: [Bug middle-end/70678] Static function compilation behaviour changes with __attribute__((optimize("O2"))) even if already compiling with -O2
Date: Fri, 14 Sep 2018 19:28:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Component|c |middle-end
Resolution|--- |WONTFIX
Known to fail| |5.4.0, 6.3.0, 7.3.0, 8.2.0,
| |9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the top of trunk but resolving as Won't Fix based on comment #2.
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Subject: [Bug c++/72865] Adding __may_alias__ attribute triggers a compilation error
Date: Fri, 14 Sep 2018 19:29:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |7.3.0, 8.2.0, 9.0
Resolution|--- |FIXED
Known to fail| |5.2.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed fixed.
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Subject: [Bug c++/77306] Unable to specify visibility for explicit template instantiations
Date: Fri, 14 Sep 2018 19:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Please post patches for review to gcc-patches.
>From gcc-bugs-return-615313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 19:32:15 2018
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Subject: [Bug c++/77419] Inconsistent behavior with auto& and __attribute__((unused))
Date: Fri, 14 Sep 2018 19:43:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |6.4.0, 7.3.0, 8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the top of trunk (GCC 9):
$ cat t.C && gcc -O2 -S -Wall t.C
int main() {
int __attribute__((unused)) int_var_unused = 42;
int int_var = 42;
int& __attribute__((unused)) int_ref = int_var;
auto __attribute__((unused)) auto_var_unused = 42;
auto auto_var = 42;
auto& __attribute__((unused)) auto_ref = auto_var;
return 0;
}
t.C: In function ‘int main()’:
t.C:8:35: warning: unused variable ‘auto_ref’ [-Wunused-variable]
8 | auto& __attribute__((unused)) auto_ref = auto_var;
| ^~~~~~~~
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Subject: [Bug go/87260] [8/9 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Fri, 14 Sep 2018 19:43:00 -0000
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--- Comment #3 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Fri Sep 14 19:42:27 2018
New Revision: 264331
URL: https://gcc.gnu.org/viewcvs?rev=264331&root=gcc&view=rev
Log:
PR go/87260
cmd/go: correct gccgo buildid file on ARM
Bring in https://golang.org/cl/135297 from the gc repository to fix a
GCC bug report.
Original CL description:
The GNU assembler for ARM treats @ as a comment character, so section
types must be written using % instead.
Fixes https://gcc.gnu.org/PR87260.
Reviewed-on: https://go-review.googlesource.com/135360
Modified:
branches/gcc-8-branch/libgo/go/cmd/go/internal/work/buildid.go
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Subject: [Bug c++/77440] [[noreturn]] does not work at end of main().
Date: Fri, 14 Sep 2018 19:47:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=52003
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bug 52003 was closed as invalid so that would be a precedent for doing the same
with this report. But, the Intel compiler does avoid issuing the warning and
that seems reasonable and useful to me. Not warning on the test case (i.e.,
main) is also consistent with not issuing warning for the following:
[[noreturn]] int f () { while(true); }
With that I will confirm this request.
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Subject: [Bug go/87260] [8/9 Regression] go fails to build a simple program on arm-linux-gnueabihf
Date: Fri, 14 Sep 2018 19:53:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
Should be fixed on trunk and GCC 8 branch.
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Subject: [Bug c++/77542] __attribute__((warn_unused_result)) ignored on function template
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77542
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |7.3.0, 8.2.0, 9.0
Resolution|--- |FIXED
Known to fail| |5.3.0, 6.4.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
After fixing the test in attachment 39608 I get the output below which I think
is what the reporter expected. Resolving as fixed.
$ cat t.C && xg++ -S -Wall t.C
#include <memory>
class Foo {
public:
void close() { }
private:
int foo;
};
struct FooDeleter
{
void operator()(Foo *foo) { foo->close(); }
};
class Test {
public:
typedef std::unique_ptr<Foo, FooDeleter> BindScope;
template <typename... Args>
BindScope bind(Args&&... args) __attribute__((warn_unused_result));
BindScope checkWarningInt(int arg) __attribute__((warn_unused_result));
BindScope checkWarningFoo(int arg) __attribute__((warn_unused_result));
operator Foo*() { return m_ptr.get(); }
private:
std::unique_ptr<Foo> m_ptr;
};
template <typename... Args>
Test::BindScope Test::bind(Args&&... args) {
BindScope bindScope(*this);
return std::move(bindScope);
}
Test::BindScope Test::checkWarningFoo(int arg) {
BindScope bindScope(*this);
return std::move(bindScope);
}
Test::BindScope Test::checkWarningInt(int arg) {
return 0;
}
int main(int argc, char *argv[]) {
Test t;
t.bind(1, "foo"); // no warning <--- that's my bug
t.checkWarningFoo(1); // emits warning
t.checkWarningInt(1); // emits warning
}
t.C: In member function ‘Test::BindScope Test::checkWarningFoo(int)’:
t.C:38:19: warning: moving a local object in a return statement prevents copy
elision [-Wpessimizing-move]
38 | return std::move(bindScope);
| ~~~~~~~~~^~~~~~~~~~~
t.C:38:19: note: remove ‘std::move’ call
t.C: In function ‘int main(int, char**)’:
t.C:47:19: warning: ignoring return value of ‘Test::BindScope Test::bind(Args&&
...) [with Args = {int, const char (&)[4]}; Test::BindScope =
std::unique_ptr<Foo, FooDeleter>]’, declared with attribute warn_unused_result
[-Wunused-result]
47 | t.bind(1, "foo"); // no warning <--- that's my bug
| ^
t.C:31:17: note: declared here
31 | Test::BindScope Test::bind(Args&&... args) {
| ^~~~
t.C:48:23: warning: ignoring return value of ‘Test::BindScope
Test::checkWarningFoo(int)’, declared with attribute warn_unused_result
[-Wunused-result]
48 | t.checkWarningFoo(1); // emits warning
| ^
t.C:36:17: note: declared here
36 | Test::BindScope Test::checkWarningFoo(int arg) {
| ^~~~
t.C:49:23: warning: ignoring return value of ‘Test::BindScope
Test::checkWarningInt(int)’, declared with attribute warn_unused_result
[-Wunused-result]
49 | t.checkWarningInt(1); // emits warning
| ^
t.C:41:17: note: declared here
41 | Test::BindScope Test::checkWarningInt(int arg) {
| ^~~~
t.C: In instantiation of ‘Test::BindScope Test::bind(Args&& ...) [with Args =
{int, const char (&)[4]}; Test::BindScope = std::unique_ptr<Foo, FooDeleter>]’:
t.C:47:18: required from here
t.C:33:29: warning: moving a local object in a return statement prevents copy
elision [-Wpessimizing-move]
33 | return std::move(bindScope);
| ^
t.C:33:29: note: remove ‘std::move’ call
>From gcc-bugs-return-615318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 19:59:10 2018
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Subject: [Bug c++/78951] Attributes allowed in an incorrect position
Date: Fri, 14 Sep 2018 20:00:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Clang and ICC both reject the code.
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87311] New: missing integer overflow detection on negation of the minimum value with -ftrapv or UB sanitizer
Date: Fri, 14 Sep 2018 20:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87311
Bug ID: 87311
Summary: missing integer overflow detection on negation of the
minimum value with -ftrapv or UB sanitizer
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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When using -ftrapv or -fsanitize=undefined, GCC sometimes misses integer
overflow detection on negation of the minimum value (e.g. LONG_MIN for type
long). For instance:
#include <stdio.h>
#include <limits.h>
int main (void)
{
long i, j;
i = j = LONG_MIN;
i = -i - 1;
fprintf (stderr, "%ld\n", i);
j = -j;
fprintf (stderr, "%ld\n", j);
return 0;
}
$ gcc-snapshot tst.c -o tst -ftrapv
$ ./tst
9223372036854775807
zsh: abort (core dumped) ./tst
Integer overflow on -j is detected, but not the one on -i. With optimizations,
none is detected:
$ gcc-snapshot tst.c -o tst -ftrapv -O
$ ./tst
9223372036854775807
-9223372036854775808
which is particularly bad because the code may assume that negating a negative
value yields a positive value.
With -fsanitize=undefined, one gets the expected error "runtime error: negation
of -9223372036854775808 cannot be represented in type 'long int'; cast to an
unsigned type to negate this value to itself" only for -j (with or without
optimizations).
All GCC versions seem to be affected, including the trunk.
>From gcc-bugs-return-615320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:01:17 2018
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Subject: [Bug c++/79021] attribute noreturn on function template ignored in generic lambda
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |msebor at gcc dot gnu.org
Known to fail| |6.4.0, 7.3.0, 8.2.0, 9.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reconfirmed with the top of trunk (GCC 9).
>From gcc-bugs-return-615321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:05:26 2018
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Subject: [Bug c++/79458] attributes on constructor between class name and parameter list not accepted
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
No improvement in GCC 8 or 9. The top of trunk prints:
$ cat t.C && gcc -O2 -S -Wall -std=c++1z t.C
class test {
test [[gnu::nonnull]] (char * arg);
};
test::test(char * arg) {
}
t.C:3:27: error: expected unqualified-id before ‘char’
3 | test [[gnu::nonnull]] (char * arg);
| ^~~~
t.C:3:27: error: expected ‘)’ before ‘char’
3 | test [[gnu::nonnull]] (char * arg);
| ~^~~~
| )
t.C:6:1: error: no declaration matches ‘test::test(char*)’
6 | test::test(char * arg) {
| ^~~~
t.C:2:7: note: candidates are: ‘constexpr test::test(test&&)’
2 | class test {
| ^~~~
t.C:2:7: note: ‘constexpr test::test(const test&)’
t.C:2:7: note: ‘constexpr test::test()’
t.C:2:7: note: ‘class test’ defined here
>From gcc-bugs-return-615322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:07:57 2018
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Subject: [Bug c/79586] missing -Wdeprecated depending on position of attribute
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-07-31 00:00:00 |2018-9-14
Known to fail|7.0 |7.2.0, 8.2.0, 9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
No improvement in recent GCC versions.
>From gcc-bugs-return-615323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:12:43 2018
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87312] New: statics in lambdas should be weak not local symbols
Date: Fri, 14 Sep 2018 20:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87312
Bug ID: 87312
Summary: statics in lambdas should be weak not local symbols
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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https://godbolt.org/z/oSuiQO
// IN HEADER:
inline auto lambda = [] () -> int* {
static int foo;
return &foo;
};
inline int* func() {
static int foo;
return &foo;
};
// NOT IN HEADER:
int* lambda_addr() {
return lambda();
}
int* func_addr() {
return func();
}
Both of the "foo" objects should have exactly one address in the whole program.
The "foo" in func() will work correctly, but the "foo" in the lambda will
incorrectly have one address in each TU where it is used.
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Subject: [Bug c++/80495] attribute [[noreturn]] is accepted in function pointer declarations
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |6.4.0, 7.3.0, 8.2.0, 9.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Both Clang and ICC diagnose the test case.
At the same time, I agree that attributes in the C++ standard are poorly
specified.
>From gcc-bugs-return-615325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:18:53 2018
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Subject: [Bug c++/77440] [[noreturn]] does not work at end of main().
Date: Fri, 14 Sep 2018 20:18:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bug 80515 is about the same thing and has a lengthy discussion so let me
resolve this as duplicate of the former.
*** This bug has been marked as a duplicate of bug 80515 ***
>From gcc-bugs-return-615326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:18:54 2018
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Subject: [Bug c/80515] __attribute__ ((__noreturn__)) false alarm for 'main'
Date: Fri, 14 Sep 2018 20:20:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |kataoka-instructor at ka2 dot so-n
| |et.ne.jp
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 77440 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:20:04 2018
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Subject: [Bug c/80515] __attribute__ ((__noreturn__)) false alarm for 'main'
Date: Fri, 14 Sep 2018 20:21:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |msebor at gcc dot gnu.org
Host| |52003
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=52003
--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also bug 52003.
>From gcc-bugs-return-615328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:21:34 2018
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Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Fri, 14 Sep 2018 20:26:00 -0000
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--- Comment #12 from Jeremy Huddleston Sequoia <jeremyhu at macports dot org> ---
(In reply to Francois-Xavier Coudert from comment #11)
> (In reply to Jeremy Huddleston Sequoia from comment #10)
> > Given those, gcc only builds if we have the DevSDK ("headers at /" package)
> > installed.
>
> I may be misunderstanding what you say: GCC builds and runs fine without the
> headers in /usr/include. At Homebrew, we are not recommending users to
> install the /usr/include headers package, and we build and run GCC fine. The
> configuration is the following
> (https://github.com/Homebrew/homebrew-core/blob/master/Formula/gcc.rb):
>
> --with-native-system-header-dir=/usr/include
> --with-sysroot=/path/to/sdk
>
> if the system headers are in /path/to/sdk/usr/include. Thus, on a Mojave
> installation with Xcode CLT installed, we set /path/to/sdk to
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
Yeah, I documented the workaround of using --with-sysroot in the MacPorts port
when filing these bugs and passed on to Homebrew, but that ends up causing
gcc's search path to always look in that sysroot (ie, it becomes the default
sysroot). Thus, users will build executables that behave differently based on
where there SDK was located on their build system. That is certainly not what
is desired. If you have a build fleet that used an SDK that was located at
/Volumes/SDKs/AllMacSDKs/MacOSX10.14.sdk at build time, but your users have
/Applications/MyXcodesPath/Xcode-10.app/.../MacOSX.sdk, then that mismatch can
cause problems.
The point of --with-sysroot is to change the behavior of the built product (the
final gcc executable). The point of --with-build-sysroot is to change how we
build gcc.
>From gcc-bugs-return-615329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 20:26:09 2018
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Subject: [Bug c/87311] missing integer overflow detection on negation of the minimum value with -ftrapv or UB sanitizer
Date: Fri, 14 Sep 2018 20:54:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
/* -A - 1 -> ~A */
(simplify
(minus (convert? (negate @0)) integer_each_onep)
(if (!TYPE_OVERFLOW_TRAPS (type)
&& tree_nop_conversion_p (type, TREE_TYPE (@0)))
(bit_not (convert @0))))
I would have expected at least -ftrapv to disable this transformation, but I
see "i = ~i" in the .original dump...
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Subject: [Bug c/65158] printf attribute error reporting assumes single-byte characters
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Tom Tromey <tromey at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |REOPENED
--- Comment #2 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> There is no format specifier in C or POSIX that involves a multibyte
> character. They're all single byte characters in the 7-bit ASCII range that
> should convert to single byte characters in most (all?) encodings. It would
> take an unusual character set to map a 7-bit character to a multibyte
> sequence. Is it worth worrying about this corner case?
I think this is just a bug I noticed by inspection.
The issue is that if the user typo the source somehow, gcc will print
something invalid. So, yes, minor; but nevertheless a bug. I'm reopening
on that basis.
>From gcc-bugs-return-615331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:04:55 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87313] New: attribute malloc not used for alias analysis when it could be
Date: Fri, 14 Sep 2018 21:19:00 -0000
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Bug ID: 87313
Summary: attribute malloc not used for alias analysis when it
could be
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Attribute malloc is documented as:
This tells the compiler that a function is malloc-like, i.e., that the
pointer P returned by the function cannot alias any other pointer valid when
the function returns, and moreover no pointers to valid objects occur in any
storage addressed by P.
The test case below shows that although GCC takes advantage of this property to
eliminate impossible tests when calling __builtin_malloc it doesn't do the same
when calling a user-defined function declared with the attribute.
$ cat x.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout x.c
void f (int **p)
{
int *x = *p;
int **q = __builtin_malloc (sizeof (int*));
*q = 0; // *q cannot be equal to *p prior to the assignment
if (x != *p) // folded to false
__builtin_abort ();
}
__attribute__ ((malloc)) void* g (int);
void h (int **p)
{
int *x = *p;
int **q = g (sizeof (int*));
*q = 0; // *q cannot be equal to *p prior to the assignment
if (x != *p) // not folded
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1906, cgraph_uid=1, symbol_order=0)
f (int * * p)
{
<bb 2> [local count: 1073741824]:
return;
}
;; Function h (h, funcdef_no=1, decl_uid=1913, cgraph_uid=2, symbol_order=1)
h (int * * p)
{
int * x;
int * _1;
<bb 2> [local count: 1073741824]:
x_4 = *p_3(D);
g (8);
_1 = *p_3(D);
if (_1 != x_4)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312328]:
return;
}
>From gcc-bugs-return-615332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:19:41 2018
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Subject: [Bug tree-optimization/87314] New: pointless comparison of malloc result to a string not eliminated
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87314
Bug ID: 87314
Summary: pointless comparison of malloc result to a string not
eliminated
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
GCC fails to eliminate the impossible test in the test case below (despite the
warning). Clang eliminates it as expected.
$ cat x.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout x.c
void f (void)
{
char *p = __builtin_malloc (8);
if (p == "")
__builtin_abort ();
}
x.c: In function ‘f’:
x.c:5:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
5 | if (p == "")
| ^~
;; Function f (f, funcdef_no=0, decl_uid=1906, cgraph_uid=1, symbol_order=0)
f ()
{
char * p;
<bb 2> [local count: 1073741824]:
p_3 = __builtin_malloc (8);
if (p_3 == "")
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312328]:
return;
}
>From gcc-bugs-return-615333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:29:27 2018
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Subject: [Bug tree-optimization/87315] New: uninitialized read from memory returned by malloc not eliminated, no warning
Date: Fri, 14 Sep 2018 21:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87315
Bug ID: 87315
Summary: uninitialized read from memory returned by malloc not
eliminated, no warning
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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The test case below is undefined because the memory returned by malloc is
uninitialized. The read access to the memory should be diagnosed. In
addition, GCC could (and arguably should) also eliminate the test since the
memory returned from malloc cannot contain valid pointers (as documented in the
attribute malloc section of GCC manual: "the pointer returned by the function
cannot alias any other pointer valid when the function returns").
As a data point, Clang folds the test to true and replaces the body of the
function with the call to abort().
$ cat x.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout x.c
void f (void)
{
void **p = __builtin_malloc (sizeof (void*));
if (*p == p)
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1906, cgraph_uid=1, symbol_order=0)
f ()
{
void * * p;
void * _1;
<bb 2> [local count: 1073741824]:
p_4 = __builtin_malloc (8);
_1 = *p_4;
if (_1 == p_4)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312328]:
return;
}
>From gcc-bugs-return-615334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:36:53 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87314] pointless comparison of malloc result to a string not eliminated
Date: Fri, 14 Sep 2018 21:37:00 -0000
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Same here (Clang doesn't eliminate the test here though):
void f (void)
{
void *p = __builtin_malloc (sizeof (void*));
if (p == f) // not folded
__builtin_abort ();
}
Here, GCC eliminates the equality test with a but not the one with b (Clang
eliminates neither):
char a[8] = "";
char b[8];
void f (void)
{
void *p = __builtin_malloc (sizeof (void*));
if (p == a) // folded to false
__builtin_abort ();
}
void g (void)
{
void *p = __builtin_malloc (sizeof (void*));
if (p == b) // not folded
__builtin_abort ();
}
>From gcc-bugs-return-615335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:37:38 2018
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From: "david at pgmasters dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87316] New: gcc: internal compiler error: Killed (program cc1)
Date: Fri, 14 Sep 2018 21:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87316
Bug ID: 87316
Summary: gcc: internal compiler error: Killed (program cc1)
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Got this while compiling a unit test module. A bunch of .c files are directly
included and there are a lot of test macros so it gets pretty big. If I remove
some tests then it compiles and runs so the problem seems size related.
However, it *does* work on 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5), 4.4.7 20120313
(Red Hat 4.4.7-23), 4.8.5 20150623 (Red Hat 4.8.5-28), and 5.4.0 20160609
(Ubuntu 5.4.0-6ubuntu1~16.04.10) all running on various images in the same
Docker environment.
---
* gcc version and options:
$ docker exec -it test-0 gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.3.0-16ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --with-as=/usr/bin/x86_64-linux-gnu-as
--with-ld=/usr/bin/x86_64-linux-gnu-ld --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
* system type:
Ubuntu 18.04 (4GB memory)
on Docker version 18.06.0-ce, build 0ffa825
on VirtualBox 5.2.16
on MacOS 10.13.6
iMac (Retina 5K, 27-inch, Late 2014, 4 GHz Intel Core i7)
* gcc command line and error:
vagrant@u18-test:~/test/gcov-u18-0$ gcc -save-temps -I. test.c
gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
>From gcc-bugs-return-615336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:38:48 2018
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
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--- Comment #1 from David <david at pgmasters dot net> ---
Created attachment 44696
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44696&action=edit
preprocessed output of test.c
>From gcc-bugs-return-615337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:40:52 2018
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Fri, 14 Sep 2018 21:43:00 -0000
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--- Comment #2 from David <david at pgmasters dot net> ---
The test.i file was too large to attach directly so I was forced to gzip it.
>From gcc-bugs-return-615338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 21:43:09 2018
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Fri, 14 Sep 2018 22:03:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |memory-hog
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>gcc: internal compiler error: Killed (program cc1)
This means GCC ran out of memory.
>From gcc-bugs-return-615339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 14 22:03:34 2018
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Subject: [Bug other/69968] RFC: Use Damerau-Levenshtein within spellcheck.c, rather than Levenshtein
Date: Fri, 14 Sep 2018 22:03:00 -0000
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Fri Sep 14 22:02:58 2018
New Revision: 264335
URL: https://gcc.gnu.org/viewcvs?rev=264335&root=gcc&view=rev
Log:
Fix overeager spelling corrections (PR c/82967)
This patch tunes class best_match's cutoff for rejecting meaningless
spelling suggestions.
Previously, we allowed an edit distance of up to half of the length of the
longer of the goal string and closest candidate strings, rounded down.
With this patch, we now allow only up to a third - with some tuning of
rounding (and for very short strings), to ensure that:
(a) everything that worked before still works (with the removal of a
couple of cases that shouldn't), and that
(b) the new threshold is always at least as conservative as the old
threshold and thus shouldn't offer new nonsensical suggestions (with
the possible exception of cases where transposition has helped; see
r261521 aka Damerau-Levenshtein; PR other/69968).
In particular, all of the bogus suggestions from PR c/82967 are now
no longer offered.
gcc/ChangeLog:
PR c/82967
* spellcheck.c (get_edit_distance_cutoff): New function.
(selftest::test_edit_distance_unit_test_oneway): Rename to...
(selftest::test_get_edit_distance_one_way): ...this.
(selftest::test_get_edit_distance_unit): Rename to...
(selftest::test_get_edit_distance_both_ways): ...this.
(selftest::test_edit_distances): Move tests to this new function,
and test some more pairs of strings. Update for above renaming.
(selftest::get_old_cutoff): New function.
(selftest::test_get_edit_distance_cutoff): New function.
(selftest::assert_suggested_for): New function.
(ASSERT_SUGGESTED_FOR): New macro.
(selftest::assert_not_suggested_for): New function.
(ASSERT_NOT_SUGGESTED_FOR): New macro.
(selftest::test_suggestions): New function.
(selftest::spellcheck_c_tests): Move test_get_edit_distance_unit
tests to selftest::test_edit_distances and call it. Add calls to
selftest::test_get_edit_distance_cutoff and
selftest::test_suggestions.
* spellcheck.h (get_edit_distance_cutoff): New function declaration.
(best_match::consider): Replace hard-coded cutoff calculation with
a call to...
(best_match::get_cutoff): New declaration.
(best_match::get_best_meaningful_candidate): Likewise.
gcc/testsuite/ChangeLog:
PR c/82967
* c-c++-common/attributes-1.c: Remove bogus suggestion from
dg-prune-output.
* gcc.dg/diagnostic-token-ranges.c (undeclared_identifier): Remove
bogus suggestion.
* gcc.dg/spellcheck-identifiers-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/spellcheck-identifiers-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/spellcheck.c
trunk/gcc/spellcheck.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/gcc.dg/diagnostic-token-ranges.c
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82967] "did you mean" suggestions are way too suggestive
Date: Fri, 14 Sep 2018 22:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82967
--- Comment #10 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Fri Sep 14 22:02:58 2018
New Revision: 264335
URL: https://gcc.gnu.org/viewcvs?rev=264335&root=gcc&view=rev
Log:
Fix overeager spelling corrections (PR c/82967)
This patch tunes class best_match's cutoff for rejecting meaningless
spelling suggestions.
Previously, we allowed an edit distance of up to half of the length of the
longer of the goal string and closest candidate strings, rounded down.
With this patch, we now allow only up to a third - with some tuning of
rounding (and for very short strings), to ensure that:
(a) everything that worked before still works (with the removal of a
couple of cases that shouldn't), and that
(b) the new threshold is always at least as conservative as the old
threshold and thus shouldn't offer new nonsensical suggestions (with
the possible exception of cases where transposition has helped; see
r261521 aka Damerau-Levenshtein; PR other/69968).
In particular, all of the bogus suggestions from PR c/82967 are now
no longer offered.
gcc/ChangeLog:
PR c/82967
* spellcheck.c (get_edit_distance_cutoff): New function.
(selftest::test_edit_distance_unit_test_oneway): Rename to...
(selftest::test_get_edit_distance_one_way): ...this.
(selftest::test_get_edit_distance_unit): Rename to...
(selftest::test_get_edit_distance_both_ways): ...this.
(selftest::test_edit_distances): Move tests to this new function,
and test some more pairs of strings. Update for above renaming.
(selftest::get_old_cutoff): New function.
(selftest::test_get_edit_distance_cutoff): New function.
(selftest::assert_suggested_for): New function.
(ASSERT_SUGGESTED_FOR): New macro.
(selftest::assert_not_suggested_for): New function.
(ASSERT_NOT_SUGGESTED_FOR): New macro.
(selftest::test_suggestions): New function.
(selftest::spellcheck_c_tests): Move test_get_edit_distance_unit
tests to selftest::test_edit_distances and call it. Add calls to
selftest::test_get_edit_distance_cutoff and
selftest::test_suggestions.
* spellcheck.h (get_edit_distance_cutoff): New function declaration.
(best_match::consider): Replace hard-coded cutoff calculation with
a call to...
(best_match::get_cutoff): New declaration.
(best_match::get_best_meaningful_candidate): Likewise.
gcc/testsuite/ChangeLog:
PR c/82967
* c-c++-common/attributes-1.c: Remove bogus suggestion from
dg-prune-output.
* gcc.dg/diagnostic-token-ranges.c (undeclared_identifier): Remove
bogus suggestion.
* gcc.dg/spellcheck-identifiers-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/spellcheck-identifiers-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/spellcheck.c
trunk/gcc/spellcheck.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/gcc.dg/diagnostic-token-ranges.c
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82967] "did you mean" suggestions are way too suggestive
Date: Fri, 14 Sep 2018 22:47:00 -0000
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--- Comment #11 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Fixed on trunk; keeping open until I backport it to gcc-8-branch.
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From: "david at pgmasters dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Fri, 14 Sep 2018 23:11:00 -0000
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--- Comment #4 from David <david at pgmasters dot net> ---
Hmm, yeah, increasing the memory a bit (4GB -> 5GB) leads to a successful
compile.
I guess it is expected that newer versions use more memory -- more features,
etc.
The interesting thing is that I was combining test units in a bid to save time.
Each unit has to start a container, compile/link, and then run the test with
gcov.
What actually happened was that the one combined test on gcc 7 (once I got the
memory bumped up) actually ran about 2.5 times slower than the three separate
tests. That's compile/link + execution. Unfortunately the test scheduler does
not allow me to separate those times but if I run the test manually it
completes in < 1 second. That means the other 41 seconds are compile time.
However, older compilers <= 4 showed no regression when dealing with the
combined test file, which was overall more efficient than separate test runs.
That advantage went away with the gcc 5: even though it is more memory
efficient than gcc7 it is just about as slow.
I had thought the gcc 7 compile/tests were slower because that's where we do
our coverage testing. After disabling coverage I see little change in speed --
gcc7 is about six times slower than older compilers in my tests, aside from
using a lot more memory.
It could be that there's a variable that I'm missing here, but in general, is
this expected behavior from newer versions of gcc?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87184] generic-match.c:55076:1: ICE: Segmentation fault
Date: Fri, 14 Sep 2018 23:26:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed by scc changes yesterday.
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Subject: [Bug middle-end/87188] Function pointer canonicalization optimized away
Date: Fri, 14 Sep 2018 23:31:00 -0000
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--- Comment #25 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Fri Sep 14 23:26:12 2018
New Revision: 264336
URL: https://gcc.gnu.org/viewcvs?rev=264336&root=gcc&view=rev
Log:
PR middle-end/87188
* dojump.c (do_compare_and_jump): Canonicalize function pointers
when one operand is a function pointer. Use POINTER_TYPE_P and
FUNC_OR_METHOD_TYPE_P.
* expr.c (do_store_flag): Use POINTER_TYPE_P and FUNC_OR_METHOD_TYPE_P.
* fold-const.c (build_range_check): Likewise.
* match.pd (simple_comparison): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dojump.c
trunk/gcc/expr.c
trunk/gcc/fold-const.c
trunk/gcc/match.pd
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Subject: [Bug middle-end/87188] Function pointer canonicalization optimized away
Date: Sat, 15 Sep 2018 05:26:00 -0000
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--- Comment #26 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Fri Sep 14 23:30:32 2018
New Revision: 264337
URL: https://gcc.gnu.org/viewcvs?rev=264337&root=gcc&view=rev
Log:
PR middle-end/87188
* dojump.c (do_compare_and_jump): Canonicalize function pointers
when one operand is a function pointer. Use POINTER_TYPE_P and
FUNC_OR_METHOD_TYPE_P.
* expr.c (do_store_flag): Use POINTER_TYPE_P and FUNC_OR_METHOD_TYPE_P.
* fold-const.c (build_range_check): Likewise.
* match.pd (simple_comparison): Likewise.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/dojump.c
branches/gcc-8-branch/gcc/expr.c
branches/gcc-8-branch/gcc/fold-const.c
branches/gcc-8-branch/gcc/match.pd
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87317] New: Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
Date: Sat, 15 Sep 2018 06:22:00 -0000
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Bug ID: 87317
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Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: thiago at kde dot org
Target Milestone: ---
Test:
#include <immintrin.h>
int f(void *ptr)
{
__m128i data = _mm_loadl_epi64((__m128i *)ptr);
data = _mm_cvtepu8_epi16(data);
return _mm_cvtsi128_si32(data);
}
GCC generates (-march=haswell or -march=skylake):
vmovq (%rdi), %xmm0
vpmovzxbw %xmm0, %xmm0
vmovd %xmm0, %eax
ret
Note that the VPMOVZXBW instruction only reads the low 8 bytes from the source,
including if it is a memory reference. Both Clang and ICC generate:
vpmovzxbw (%rdi), %xmm0
vmovd %xmm0, %eax
retq
Similarly for:
void f(void *dst, void *ptr)
{
__m128i data = _mm_cvtsi32_si128(*(int*)ptr);
data = _mm_cvtepu8_epi32(data);
_mm_storeu_si128((__m128i*)dst, data);
}
GCC:
vmovd (%rsi), %xmm0
vpmovzxbd %xmm0, %xmm0
vmovups %xmm0, (%rdi)
ret
Clang and ICC:
vpmovzxbd (%rsi), %xmm0
vmovdqu %xmm0, (%rdi)
retq
There are other instructions that might benefit from this.
AVX-512 memory instructions where the OpMask is a constant might be candidates
too.
>From gcc-bugs-return-615347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 06:22:20 2018
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Subject: [Bug target/87317] Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
Date: Sat, 15 Sep 2018 06:36:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
What I see:
- we could implement _mm_cvtsi128_si32 using gcc extensions instead of a
builtin
- I think we have code to simplify (vec_select (vec_concat ...) ...) when we
select everything from the same half, but we do not handle an intermediate
subreg: (vec_select:V8QI (subreg:V16QI (vec_concat:V2DI ...
- sse4_1_zero_extendv8qiv8hi2 is described as taking a v16qi as input, not a
v8qi
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Subject: [Bug tree-optimization/87315] uninitialized read from memory returned by malloc not eliminated, no warning
Date: Sat, 15 Sep 2018 07:13:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
There could be 2 steps:
- replace the read with an undefined value (SSA_NAME with GIMPLE_NOP defining
statement). I vaguely remember someone was not enthusiastic about it, but I
don't remember why.
- fold a comparison (other operations as well?) with an undefined value.
Arguably, gcc could pick any value for the result (whichever kills more code?).
It does seem reasonable to pick false for == and true for !=, though for < or >
it is less clear, and if someone does the equivalent of p==p where p is
undefined, it can be surprising.
This is likely to remove a number of uninitialized warnings.
>From gcc-bugs-return-615349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 07:13:41 2018
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Subject: [Bug fortran/87318] New: gfortran.dg/dtio_1.f90 is invalid
Date: Sat, 15 Sep 2018 09:21:00 -0000
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Bug ID: 87318
Summary: gfortran.dg/dtio_1.f90 is invalid
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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dtio_1.f90 violates a requirement from F08, chapter 9.6.4.8.3, paragraph 18:
"If the defined input/output procedure returns a nonzero value for the iostat
argument, the procedure shall also return an explanatory message in the iomsg
argument. Otherwise, the procedure shall not change the value of the iomsg
argument."
See also the discussion at
https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/796541.
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Subject: [Bug middle-end/86864] [9 Regression] ICE in commit_one_edge_insertion, at cfgrtl.c:2025 since r261795
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sat Sep 15 09:21:09 2018
New Revision: 264342
URL: https://gcc.gnu.org/viewcvs?rev=264342&root=gcc&view=rev
Log:
PR middle-end/86864
* cfgexpand.c (expand_gimple_basic_block): Be prepared for a BARRIER
before and after a JUMP_TABLE_DATA.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/20180915-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86864] [9 Regression] ICE in commit_one_edge_insertion, at cfgrtl.c:2025 since r261795
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for reporting the problem.
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Subject: [Bug tree-optimization/86990] [9 regression] wrong code at -O2 on x86_64-linux-gnu in 64-bit mode
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
Summary|[9 Regression] wrong code |[9 regression] wrong code
|at -O2 on x86_64-linux-gnu |at -O2 on x86_64-linux-gnu
|in 64-bit mode |in 64-bit mode
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
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Subject: [Bug tree-optimization/87315] uninitialized read from memory returned by malloc not eliminated, no warning
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> This is likely to remove a number of uninitialized warnings.
Is it possible to eliminate after issuing the warnings?
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
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--- Comment #3 from Róbert Kohányi <kohanyi.robert at gmail dot com> ---
Created attachment 44697
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44697&action=edit
/usr/lib/gcc/x86_64-pc-msys/7.3.0/include/stdbool.h
Here's the referenced <stdbool.h> on Windows using gcc 7.3.0
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
Date: Sat, 15 Sep 2018 11:42:00 -0000
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--- Comment #4 from Róbert Kohányi <kohanyi.robert at gmail dot com> ---
Created attachment 44698
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44698&action=edit
/usr/lib/gcc/x86_64-linux-gnu/5/include/stdbool.h
Here's the <stdbool.h> on Ubuntu using gcc 5.4.0.
>From gcc-bugs-return-615356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 11:42:17 2018
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
Date: Sat, 15 Sep 2018 11:50:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-15
CC| |manu at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Probably because the warning happens within a system header:
<source>: In function 'main':
<source>:6:14: warning: ISO C90 does not support boolean types
[-Wc90-c99-compat]
#define bool _Bool
^~~~~
<source>:30:2: note: in expansion of macro 'bool'
bool ok = true;
^~~~
This is another case of PR60304. The solution is to follow guidelines:
https://gcc.gnu.org/wiki/DiagnosticsGuidelines#Locations
and use
source_location loc =
expansion_point_location_if_in_system_header (original_location)
In this case, -Wsystem-headers doesn't work because:
if (!in_system_header_at (loc))
pedwarn_c90 (loc, OPT_Wpedantic,
"ISO C90 does not support boolean types");
I think this is useless, the diagnostics machinery already should disable
warning when loc is in a system header but still warn when -Wsystem-headers is
used.
>From gcc-bugs-return-615357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 11:50:10 2018
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Subject: [Bug tree-optimization/87315] uninitialized read from memory returned by malloc not eliminated, no warning
Date: Sat, 15 Sep 2018 11:50:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
There are so many Wuninitialized open bugs (PR24639) that almost every
Wuninitialized bug has already been reported and analyzed.
*** This bug has been marked as a duplicate of bug 87209 ***
>From gcc-bugs-return-615358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 11:50:10 2018
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Subject: [Bug middle-end/87209] Wuninitialized or Wmaybe-uninitialized doesn't warn when malloc's return value is used without being initialized
Date: Sat, 15 Sep 2018 11:57:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 87315 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 11:57:46 2018
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Subject: [Bug tree-optimization/55060] False un-initialized variable warnings
Date: Sat, 15 Sep 2018 12:01:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This seems fixed in GCC 9, even with -O1, but a testcase should be added to the
testsuite to prevent regression:
/* {dg-options "-O1 -Wuninitialized" }*/
static void a(int *i) { }
static void b(int p) { }
int foo(void) {
int i;
a(&i);
b(i);
return 0;
}
static void c(int *i) { }
extern void d(int p);
int bar(void) {
int i;
c(&i);
d(i); /* dg-warning "uninitialized" */
return 0;
}
extern void e(int *i);
static void f(int p) {};
int baz(void) {
int i;
e(&i);
f(i);
return 0;
}
>From gcc-bugs-return-615360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 12:01:41 2018
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From: "david at pgmasters dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Sat, 15 Sep 2018 12:16:00 -0000
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--- Comment #5 from David <david at pgmasters dot net> ---
I've isolated the compilation and the results are still as above -- new
versions of gcc are significantly slower compiling the attached test.i.
Using this command: gcc -std=gnu99 -O0 -c test.i
gcc 7.3.0 (Ubuntu 18.04): 34 seconds
gcc 5.4.0 (Ubuntu 16.04): 35 seconds
gcc 4.8.5 (Ubuntu 12.04): < 1 second
gcc 4.6.3 (CentOS 7) : < 1 second
gcc 4.4.7 (CentOS 6) : < 1 second
This has strayed a bit from the OP, but it seems to me that the time/memory
consumption may be related.
>From gcc-bugs-return-615361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 12:16:52 2018
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Subject: [Bug c/65158] printf attribute error reporting assumes single-byte characters
Date: Sat, 15 Sep 2018 12:23:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |manu at gcc dot gnu.org
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
void foo(void) {
__builtin_printf("%ñ%ä¸");
__builtin_printf ("%\x1B$B"); /* Taken from PR33748 */
}
<source>: In function 'void foo()':
<source>:2:22: warning: unknown conversion type character '\xc3' in format
[-Wformat=]
2 | __builtin_printf("%ñ%ä¸");
| ^~~~~~~~~
<source>:2:22: warning: unknown conversion type character '\xe4' in format
[-Wformat=]
<source>:3:23: warning: unknown conversion type character '\x1b' in format
[-Wformat=]
3 | __builtin_printf ("%\x1B$B");
| ^~~~~~~~~
Note that ñ and ä¸ are multi-byte but the message only shows one byte.
Another bug is that the location info fails to point within the format string
(ccing David):
void foo(int i) {
__builtin_printf("%i%i%i%i%Ã%i%i",i,i,i,i,i,i);
}
<source>:2:23: warning: unknown conversion type character '\xc3' in format
[-Wformat=]
2 | __builtin_printf("%i%i%i%i%Ã%i%i",i,i,i,i,i,i);
| ^~~~~~~~~~~~~~~~~
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87299] #pragma GCC target behaves differently when using -save-temps
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-15
CC| |manu at gcc dot gnu.org
Component|preprocessor |middle-end
Summary|use of -save-temps causes |#pragma GCC target behaves
|undue macro re-definition |differently when using
|warning |-save-temps
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
test.c:4:0: warning: "x" redefined
# define x z
^
test.c:1:0: note: this is the location of the previous definition
#define x y
^
The mirror testcase:
#pragma GCC target("avx512f")
#define x y
# define __AVX512F__ z
#ifndef __AVX512F__
#define x z
#endif
$ gcc -c test.c
test.c:3:0: warning: "__AVX512F__" redefined
# define __AVX512F__ z
^
test.c:2:0: note: this is the location of the previous definition
#define x y
^
$ gcc -c --save-temps test.c
So #pragma GCC target does not seem to create the macro when --save-temps is
used.
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Subject: [Bug tree-optimization/60165] "may be used uninitialized" warning with -O3 but not with -O2
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--- Comment #19 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Vincent Lefèvre from comment #18)
> OK, but then, this means that the first sentence of the
> -Wmaybe-uninitialized documentation is incorrect. That's probably the "there
> exists" that is problematic, because of the possible difference of what
> actually exists and what the compiler sees.
I don't disagree but a bug report about that will just linger forever without
any useful information. Sending a documentation patch and convincing the
middle-end reviewers will be more effective.
Also, the same is true for any middle-end warning:
https://gcc.gnu.org/wiki/cauldron2018?action=AttachFile&do=get&target=Static_Analysis_in_GCC_Middle-End.pdf
>From gcc-bugs-return-615364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 12:42:00 2018
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Subject: [Bug middle-end/87299] #pragma GCC target behaves differently when using -save-temps
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|diagnostic |
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Not a diagnostic issue, either target/middle-end or preprocessor.
>From gcc-bugs-return-615365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 12:51:27 2018
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Subject: [Bug tree-optimization/60165] "may be used uninitialized" warning with -O3 but not with -O2
Date: Sat, 15 Sep 2018 13:43:00 -0000
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--- Comment #20 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Vincent Lefèvre from comment #18)
> OK, but then, this means that the first sentence of the
> -Wmaybe-uninitialized documentation is incorrect. That's probably the "there
> exists" that is problematic, because of the possible difference of what
> actually exists and what the compiler sees.
"There exists" is implicitly "in the internal representation at some specific
stage in the optimization process", not directly in the user's code. This
applies to any middle-end warning. If you want to suggest some clearer
documentation...
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Subject: [Bug c/87319] New: When vector is wrapped, expression is not optimized.
Date: Sat, 15 Sep 2018 16:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87319
Bug ID: 87319
Summary: When vector is wrapped, expression is not optimized.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Priority: P3
Component: c
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I was playing with vector extensions and intrinsics, checking if gcc would be
able to optimize vector expression a*c+b*c to (a+b)*c. It turned out that this
works for intrinsics (both wrapped in class and non-wrapped), and vector
extensions (non-wrapped only). When built-in operators for vector extensions
were used, code was not optimized (test3). Code was compiled with "-O3 -mavx2
-std=c++11".
[code]
#include <stdint.h>
#include <immintrin.h>
typedef int32_t VInt __attribute((vector_size(32)));
class V1
{
VInt v;
public:
constexpr V1(const V1& v) : v(v.v) {}
constexpr V1(const VInt& v) : v(v) {}
constexpr V1 operator+(const V1& v2) const
{ return V1(v + v2.v); }
constexpr V1 operator*(const V1& v2) const
{ return V1(v * v2.v); }
constexpr operator VInt() const
{ return v; }
};
class V2
{
__m256i v;
public:
constexpr V2(const V2& v) : v(v.v) {}
constexpr V2(const __m256i& v) : v(v) {}
V2 operator+(const V2& v2) const
{ return V2(_mm256_add_epi32(v, v2.v)); }
V2 operator*(const V2& v2) const
{ return V2(_mm256_mullo_epi32(v, v2.v)); }
constexpr operator __m256i() const
{ return v; }
};
void test1(const int* a, const int* b, const int* c, int* d)
{
const VInt va = *(VInt*)a;
const VInt vb = *(VInt*)b;
const VInt vc = *(VInt*)c;
*(VInt*)d = va * vc + vb * vc;
}
void test2(const int* a, const int* b, const int* c, int* d)
{
const __m256i va = *(__m256i*)a;
const __m256i vb = *(__m256i*)b;
const __m256i vc = *(__m256i*)c;
const __m256i vd =_mm256_add_epi32(
_mm256_mullo_epi32(va, vc),
_mm256_mullo_epi32(vb, vc)
);
*(__m256i*)d = vd;
}
void test3(const int* a, const int* b, const int* c, int* d)
{
const V1 va = V1(*(VInt*)a);
const V1 vb = V1(*(VInt*)b);
const V1 vc = V1(*(VInt*)c);
*(VInt*)d = va * vc + vb * vc;
}
void test4(const int* a, const int* b, const int* c, int* d)
{
const V2 va(*(__m256i*)a);
const V2 vb(*(__m256i*)b);
const V2 vc(*(__m256i*)c);
*(__m256i*)d = va * vc + vb * vc;
}
[/code]
[out]
test1(int const*, int const*, int const*, int*):
vmovdqa ymm0, YMMWORD PTR [rdi]
vpaddd ymm0, ymm0, YMMWORD PTR [rsi]
vpmulld ymm0, ymm0, YMMWORD PTR [rdx]
vmovdqa YMMWORD PTR [rcx], ymm0
vzeroupper
ret
test2(int const*, int const*, int const*, int*):
vmovdqa ymm0, YMMWORD PTR [rdi]
vpaddd ymm0, ymm0, YMMWORD PTR [rsi]
vpmulld ymm0, ymm0, YMMWORD PTR [rdx]
vmovdqa YMMWORD PTR [rcx], ymm0
vzeroupper
ret
test3(int const*, int const*, int const*, int*):
vmovdqa ymm0, YMMWORD PTR [rdx]
vpmulld ymm1, ymm0, YMMWORD PTR [rdi]
vpmulld ymm0, ymm0, YMMWORD PTR [rsi]
vpaddd ymm0, ymm1, ymm0
vmovdqa YMMWORD PTR [rcx], ymm0
vzeroupper
ret
test4(int const*, int const*, int const*, int*):
vmovdqa ymm0, YMMWORD PTR [rdi]
vpaddd ymm0, ymm0, YMMWORD PTR [rsi]
vpmulld ymm0, ymm0, YMMWORD PTR [rdx]
vmovdqa YMMWORD PTR [rcx], ymm0
vzeroupper
ret
[/out]
>From gcc-bugs-return-615367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 16:14:29 2018
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Subject: [Bug c/65158] printf attribute error reporting assumes single-byte characters
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #3)
> void foo(void) {
> __builtin_printf("%ñ%ä¸");
> __builtin_printf ("%\x1B$B"); /* Taken from PR33748 */
> }
>
> <source>: In function 'void foo()':
> <source>:2:22: warning: unknown conversion type character '\xc3' in format
> [-Wformat=]
> 2 | __builtin_printf("%ñ%ä¸");
> | ^~~~~~~~~
> <source>:2:22: warning: unknown conversion type character '\xe4' in format
> [-Wformat=]
> <source>:3:23: warning: unknown conversion type character '\x1b' in format
> [-Wformat=]
> 3 | __builtin_printf ("%\x1B$B");
> | ^~~~~~~~~
>
> Note that ñ and ä¸ are multi-byte but the message only shows one byte.
What follows the percent sign must one of the C or POSIX conversion specifiers
(after any optional flags etc.) and those are all single byte characters in
most (all?) charsets. In %x\x1B$B" (in the test case from PR33748) the \x1B
character is the beginning of an ISO-2022 escape sequence and not a valid
conversion specifier so I think it's fine, even correct, to only consider it as
the (invalid) conversion specifier, print it in the warning, and restart
parsing with the byte after it. Treating what follows % as a sequence of
multibyte characters could otherwise throw off the remaining parsing.
>From gcc-bugs-return-615368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 16:25:58 2018
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Subject: [Bug middle-end/87319] When vector is wrapped, expression is not optimized.
Date: Sat, 15 Sep 2018 16:59:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-15
Component|c |middle-end
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
There are 2 places that do this transformation. One in match.pd applies only
when the type has wrapping overflow. The other one in fold_plusminus_mult_expr
applies only if the expression can be seen from the front-end, not if it
appears after inlining and simplifications. The one in fold_plusminus_mult_expr
has code to convert to an unsigned type if necessary to perform this
transformation. This code is buggy (it might cause wrong code generation), it
tests INTEGRAL_TYPE_P instead of ANY_INTEGRAL_TYPE_P (careful that it uses
unsigned_type_for later, which IIRC does not handle complex types) so it gets
the wrong answer for vectors and does the transformation in type VInt (test1).
Such code using an unsigned type is missing in match.pd.
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Subject: [Bug libgomp/87140] Segmentation fault in priority_list_upgrade_task function when execution tasks with priority
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Emiliano Silvestri <silvestri at diag dot uniroma1.it> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Emiliano Silvestri <silvestri at diag dot uniroma1.it> ---
The FIX proposed in the bug report works!
>From gcc-bugs-return-615370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 18:07:42 2018
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From: "david at pgmasters dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Sat, 15 Sep 2018 18:47:00 -0000
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--- Comment #6 from David <david at pgmasters dot net> ---
clang 6 does the compilation in under 1 second on the same container.
$ clang-6.0 -v
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8.0.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8.0.1
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Sat, 15 Sep 2018 18:59:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
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--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I will have a look. Thanks for report.
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Sat, 15 Sep 2018 19:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Marked as ASSIGNED.
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From: "kilian.verhetsel at uclouvain dot be" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87320] New: Last iteration of vectorized loop not executed when peeling for gaps
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87320
Bug ID: 87320
Summary: Last iteration of vectorized loop not executed when
peeling for gaps
Product: gcc
Version: 8.2.1
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Component: tree-optimization
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Created attachment 44699
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44699&action=edit
Program for which GCC generates incorrect code with vectorization enabled
Hello,
r256635 added support for fully masked vectorized loops that require peeling
for gaps, in which case it only uses one iteration of the epilogue. However,
this introduced an issue where the number of iteration of the epilogue can be
incorrectly computed, if peeling is not required because of the number of
iterations. This causes the last iteration of the loop to not be executed, or,
if the total number of iteration is equal to the vector, the loop to be
executed until a crash.
I have attached a small C program that illustrates this issue. I would expect
it to terminate with no output when run, and this is what happens with GCC 7:
$ gcc-7 crash-vectorization.c -O3 -mavx -o crash-vectorization &&
./crash-vectorization
# no output
$ gcc-7 -v
Using built-in specs.
COLLECT_GCC=gcc-7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc7/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,lto --enable-shared --enable-threads=posix
--enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--disable-libssp --enable-gnu-unique-object --enable-linker-build-id
--enable-lto --enable-plugin --enable-install-libiberty
--with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--program-suffix=-7 --enable-version-specific-runtime-libs
Thread model: posix
gcc version 7.3.1 20180814 (GCC)
With GCC version, on an x86-64 machine, it crashes because of a segmentation
fault:
$ gcc crash-vectorization.c -O3 -mavx -o crash-vectorization &&
./crash-vectorization
zsh: segmentation fault (core dumped) ./crash-vectorization
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--enable-cet=auto
Thread model: posix
gcc version 8.2.1 20180831 (GCC)
Running the program after compiling it with SSE (where the vector size is 2
instead of 4), it no longer crashes but the output still shows that the last
iterations of the loop were not executed:
$ gcc crash-vectorization.c -O3 -msse -o crash-vectorization &&
./crash-vectorization
fail: 3
fail: 119
I was able to reproduce this issue as of r263156.
I believe the code at fault is found in
tree-vect-loop-manip.c:vect-do-peeling:2425:
poly_uint64 bound_epilog = 0;
if (!LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
&& LOOP_VINFO_PEELING_FOR_NITER (loop_vinfo))
bound_epilog += vf - 1;
if (LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo))
bound_epilog += 1;
where bound_epilog should be set to vf instead of 1 when compiling the second
loop of the attached program.
On a sidenote, looking at the final x86 assembly for this program, it's not
clear to me why the vectorized body of the loop could not be used for the last
4 iterations. Is this not a missed optimization?
>From gcc-bugs-return-615374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 19:25:35 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87315] uninitialized read from memory returned by malloc not eliminated, no warning
Date: Sat, 15 Sep 2018 19:33:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
To be clear: besides the missing warning this is also about the kind of code
GCC emits for the uninitialized read -- a missed-optimization for lack of a
better term/keyword. It would be safer to do what Clang does and either
replace the code with a trap, or simply eliminate it altogether. Bug 87209
only covers the missing warning aspect.
>From gcc-bugs-return-615375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 19:33:23 2018
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Subject: [Bug middle-end/87209] Wuninitialized or Wmaybe-uninitialized doesn't warn when malloc's return value is used without being initialized
Date: Sat, 15 Sep 2018 19:37:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
(As suggested in bug 87315) besides issuing a warning it would be safer to do
what Clang does in cases like this and either replace the code with a trap, or
simply eliminate the access (and the malloc call) altogether.
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sat, 15 Sep 2018 19:39:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |janus at gcc dot gnu.org
Summary|Undefined symbol when using |[OOP] Undefined symbol when
|polymorphic intrinsic |using polymorphic intrinsic
|assignment |assignment
--- Comment #2 from janus at gcc dot gnu.org ---
Confirmed.
Slightly reduced test case:
program test_assign
implicit none
type :: foo_t
end type
type, extends (foo_t) :: bar_t
end type
class(foo_t), allocatable :: f
type(bar_t) :: b
f = b
end
I think a call to 'gfc_find_derived_vtab' needs to be inserted in a proper
place.
>From gcc-bugs-return-615377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 19:39:43 2018
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sat, 15 Sep 2018 20:16:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=84543
--- Comment #3 from janus at gcc dot gnu.org ---
Certainly related to PR 84543, but not exactly a duplicate.
>From gcc-bugs-return-615378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 20:16:37 2018
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Subject: [Bug c++/87322] New: [GCC 8.1+] GCC fails to parse captured lambda of 2nd inner lambda if the captured lambda has "," (having 2 arguments)
Date: Sat, 15 Sep 2018 20:39:00 -0000
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Bug ID: 87322
Summary: [GCC 8.1+] GCC fails to parse captured lambda of 2nd
inner lambda if the captured lambda has "," (having 2
arguments)
Product: gcc
Version: unknown
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Compiler thinks ',' in
inner_func2 = [] (auto a, auto b) { return a + b; }
is capture separation.
////////////////////////////////////////////////////////////
Reproducing code: https://godbolt.org/z/3h1ByQ
////////////////////////////////////////////////////////////
#include <array>
#include <algorithm>
int main()
{
constexpr std::array<std::array<double,2>,3> my_mat {
{ { 1., 1. },
{ 1., 1. },
{ 1., 1. }, }
};
std::for_each(my_mat.begin(), my_mat.end(), [
inner_func = [] (auto a, auto b) { return a + b; } ](auto& row) {
std::for_each(row.begin(), row.end(), [&,
inner_func2 = [] (auto a, auto b) { return a + b; } ]
(const double&) {
return;
});
});
}
////////////////////////////////////////////////////////////
Error:
////////////////////////////////////////////////////////////
<source>: In instantiation of 'main()::<lambda(auto:3&)> [with auto:3 = const
std::array<double, 2>]':
/opt/compiler-explorer/gcc-8.1.0/include/c++/8.1.0/bits/stl_algo.h:3882:5:
required from '_Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter =
const std::array<double, 2>*; _Funct = main()::<lambda(auto:3&)>]'
<source>:19:4: required from here
<source>:15:58: internal compiler error: Segmentation fault
inner_func2 = [] (auto a, auto b) { return a + b; } ]
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
>From gcc-bugs-return-615379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 20:39:46 2018
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sat, 15 Sep 2018 21:16:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from janus at gcc dot gnu.org ---
The following draft patch fixes both this one and PR 84543:
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 85247dd8334..98a00ef77bb 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -1366,6 +1366,10 @@ gfc_match_assignment (void)
gfc_check_do_variable (lvalue->symtree);
+ if (lvalue->ts.type == BT_CLASS)
+ gfc_find_vtab (&rvalue->ts);
+
+
return MATCH_YES;
}
>From gcc-bugs-return-615380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 21:16:42 2018
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Subject: [Bug fortran/86551] [OOP] ICE on invalid code with select type
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
CC| |janus at gcc dot gnu.org
Summary|[ICE] bare class and select |[OOP] ICE on invalid code
|type |with select type
--- Comment #2 from janus at gcc dot gnu.org ---
Further reduced test case:
program a
implicit none
type :: t1
end type
class(t1) :: c2
select type (d => c2)
end select type
end
>From gcc-bugs-return-615381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 21:33:43 2018
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Subject: [Bug fortran/86551] [OOP] ICE on invalid code with select type
Date: Sat, 15 Sep 2018 21:38:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from janus at gcc dot gnu.org ---
The ICE (and another one that is triggered by the same test case) is fixed with
this patch:
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 85247dd8334..6cf816be511 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -6009,7 +6009,7 @@ copy_ts_from_selector_to_associate (gfc_expr *associate,
gfc_expr *selector)
else
assoc_sym->as = NULL;
- if (selector->ts.type == BT_CLASS)
+ if (selector->ts.type == BT_CLASS && gfc_expr_attr (selector).class_ok)
{
/* The correct class container has to be available. */
assoc_sym->ts.type = BT_CLASS;
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index ea0ce800743..97f5402bf29 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -8862,7 +8862,8 @@ resolve_select_type (gfc_code *code, gfc_namespace
*old_ns)
return;
}
- if (!code->expr1->symtree->n.sym->attr.class_ok)
+ if (!code->expr1->symtree->n.sym->attr.class_ok
+ || !gfc_expr_attr (code->expr2).class_ok)
return;
if (code->expr2)
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sat, 15 Sep 2018 22:18:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to janus from comment #4)
> The following draft patch fixes both this one and PR 84543:
... and regtests cleanly.
>From gcc-bugs-return-615383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 15 22:18:04 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87323] New: More complicated assembly for sode with custom copy constructor
Date: Sat, 15 Sep 2018 22:32:00 -0000
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Bug ID: 87323
Summary: More complicated assembly for sode with custom copy
constructor
Product: gcc
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[code]
#include <stdint.h>
typedef int32_t VInt __attribute((vector_size(32)));
class V1
{
VInt v;
public:
constexpr V1(const V1& v) = default;
//constexpr V1(const V1& v) : v(v.v) {}
constexpr V1(const VInt& v) : v(v) {}
constexpr V1 operator+(const V1& v2) const
{ return V1(v + v2.v); }
constexpr V1 operator*(const V1& v2) const
{ return V1(v * v2.v); }
constexpr operator VInt() const
{ return v; }
};
V1 test1(V1 a, V1 b, V1 c)
{
return a * c + b * c;
}
[/code]
When code above is compiled, gcc produces following assembly:
[out]
test1(V1, V1, V1):
vpaddd ymm0, ymm1, ymm0
vpmulld ymm0, ymm0, ymm2
ret
[/out]
However when I comment out default copy constructor and uncomment custom one
(which should be equivalent), generated assembly is as follows:
[out]
test1(V1, V1, V1):
vmovdqa ymm0, YMMWORD PTR [rcx]
mov rax, rdi
vpmulld ymm1, ymm0, YMMWORD PTR [rsi]
vpmulld ymm0, ymm0, YMMWORD PTR [rdx]
vpaddd ymm0, ymm1, ymm0
vmovdqa YMMWORD PTR [rdi], ymm0
vzeroupper
ret
[/out]
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87315
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #4)
> To be clear: besides the missing warning this is also about the kind of code
> GCC emits for the uninitialized read -- a missed-optimization for lack of a
> better term/keyword. It would be safer to do what Clang does and either
> replace the code with a trap, or simply eliminate it altogether. Bug 87209
> only covers the missing warning aspect.
If you think it is more useful, please mark the other as a duplicate of this
one. Or change the title of the other one. I used the other one as the main one
because Richard pointed out where to look at to solve it.
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/65158] printf attribute error reporting assumes single-byte characters
Date: Sat, 15 Sep 2018 22:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65158
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #4)
> What follows the percent sign must one of the C or POSIX conversion
> specifiers (after any optional flags etc.) and those are all single byte
> characters in most (all?) charsets. In %x\x1B$B" (in the test case from
> PR33748) the \x1B character is the beginning of an ISO-2022 escape sequence
> and not a valid conversion specifier so I think it's fine, even correct, to
> only consider it as the (invalid) conversion specifier, print it in the
> warning, and restart parsing with the byte after it. Treating what follows
> % as a sequence of multibyte characters could otherwise throw off the
> remaining parsing.
To be honest, the support for utf8 and multi-byte encodings is so poor right
now, that I don't think this is the most pressing issue, but note that the
warning message is exactly the same for "%ñ" and "%Ã". The poor location info
would not help to find where the problem is.
<source>: In function 'void foo(int)':
<source>:3:23: warning: unknown conversion type character '\xd1' in format
[-Wformat=]
3 | __builtin_printf("%i%Ñ–%ðš’%ℹ", i);
| ^~~~~~~~~~~~~~~~
<source>:3:23: warning: unknown conversion type character '\xf0' in format
[-Wformat=]
<source>:3:23: warning: unknown conversion type character '\xe2' in format
[-Wformat=]
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87324] New: g++ ICE with overriding initializers: Segmentation fault
Date: Sat, 15 Sep 2018 22:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87324
Bug ID: 87324
Summary: g++ ICE with overriding initializers: Segmentation
fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180915 (experimental) [trunk revision 264342] (GCC)
$ g++-trunk abc.C
abc.C:9:18: error: ‘.a’ designator used multiple times in the same initializer
list
9 | } d{.a = 7, .a = 8.09};
| ^~~~
abc.C:9:22: internal compiler error: Segmentation fault
9 | } d{.a = 7, .a = 8.09};
| ^
0xee340f crash_signal
../../gcc/gcc/toplev.c:325
0x923dc0 tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3112
0x923dc0 get_class_binding_direct(tree_node*, tree_node*, int)
../../gcc/gcc/cp/name-lookup.c:1222
0xa176b8 process_init_constructor_record
../../gcc/gcc/cp/typeck2.c:1603
0xa176b8 process_init_constructor
../../gcc/gcc/cp/typeck2.c:1752
0xa176b8 digest_init_r
../../gcc/gcc/cp/typeck2.c:1166
0xa185e2 digest_init_flags(tree_node*, tree_node*, int, int)
../../gcc/gcc/cp/typeck2.c:1211
0xa185e2 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/gcc/cp/typeck2.c:808
0x8aee6d check_initializer
../../gcc/gcc/cp/decl.c:6479
0x8c6ebf cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc/gcc/cp/decl.c:7146
0x961bf6 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:19893
0x968de3 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13189
0x96ddf2 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12912
0x96e1ed cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:12788
0x96e4e4 cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4610
0x96e4e4 c_parse_file()
../../gcc/gcc/cp/parser.c:39122
0xa6cb3b c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1139
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.C
struct {
struct {
double a;
struct {
short b;
};
};
int c;
} d{.a = 7, .a = 8.09};
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Subject: [Bug middle-end/87323] More complicated assembly for sode with custom copy constructor
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Component|c |middle-end
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>which should be equivalent
Not exactly because the struct becomes a non-POD for ABI reasons.
There is a missed optimization where it does not change to (a+b) * c.
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Created attachment 44700
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44700&action=edit
Revised dtio_1.f90
Will this attached version suffice? When we wrote the test case we were not
going for valid code, but rather to exercise the internals, checking frontend
and runtime things.
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Subject: [Bug c/70082] Attribute ifunc marked functions should not be allowed to call other functions.
Date: Sun, 16 Sep 2018 03:59:00 -0000
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--- Comment #7 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Martin Sebor from comment #6)
> Carlos, do you still feel diagnosing some of the [mis]uses would be helpful,
> e.g., by a warning? (I ask because I've been doing some work in this area
> -- pr81824 -- and I might be able to take care of this at some point as
> well, perhaps for GCC 10).
I do still believe that detection and warning of misuses of IFUNC would be
helpful. The glibc solutions required to make IFUNC robust are not in place,
and so we should do what we can to warn users that it might break. They can
then disable the warnings with pragmas (in the case of -Werror) or ignore them.
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Subject: [Bug target/87317] Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
Date: Sun, 16 Sep 2018 04:05:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Try this:
https://github.com/hjl-tools/gcc/commit/a5e6fd272554f58136ba45bbdf9fd48553a72324
I got
[hjl@gnu-tools-1 gcc]$ cat x.c
#include <immintrin.h>
int f(void *ptr)
{
__m128i data = _mm_loadl_epi64((__m128i *)ptr);
data = _mm_cvtepu8_epi16(data);
return _mm_cvtsi128_si32(data);
}
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -O2 -march=haswell x.c -S
cat [hjl@gnu-tools-1 gcc]$ cat x.s
.file "x.c"
.text
.p2align 4
.globl f
.type f, @function
f:
.LFB5178:
.cfi_startproc
vpmovzxbw (%rdi), %xmm0
vmovd %xmm0, %eax
ret
.cfi_endproc
.LFE5178:
.size f, .-f
.ident "GCC: (GNU) 9.0.0 20180916 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$ cat y.c
#include <immintrin.h>
void f(void *dst, void *ptr)
{
__m128i data = _mm_cvtsi32_si128(*(int*)ptr);
data = _mm_cvtepu8_epi32(data);
_mm_storeu_si128((__m128i*)dst, data);
}
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -O2 -march=haswell y.c -S
c[hjl@gnu-tools-1 gcc]$ cat y.s
.file "y.c"
.text
.p2align 4
.globl f
.type f, @function
f:
.LFB5178:
.cfi_startproc
vpmovzxbd (%rsi), %xmm0
vmovups %xmm0, (%rdi)
ret
.cfi_endproc
.LFE5178:
.size f, .-f
.ident "GCC: (GNU) 9.0.0 20180916 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$
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Subject: [Bug target/87317] Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87317
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-16
CC| |wei3.xiao at intel dot com
Ever confirmed|0 |1
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
We can add patterns with memory operand for all vpmov<extsuffix> instructions.
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Subject: [Bug middle-end/87323] More complicated assembly for sode with custom copy constructor
Date: Sun, 16 Sep 2018 05:19:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Not exactly because the struct becomes a non-POD for ABI reasons.
So this part cannot change.
> There is a missed optimization where it does not change to (a+b) * c.
And this is a DUP.
*** This bug has been marked as a duplicate of bug 87319 ***
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Subject: [Bug middle-end/87319] When vector is wrapped, expression is not optimized.
Date: Sun, 16 Sep 2018 05:41:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
*** Bug 87323 has been marked as a duplicate of this bug. ***
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/71157] -Wnull-dereference false alarm in wrong function
Date: Sun, 16 Sep 2018 05:56:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=84203
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #6)
> > this is because it thinks skip_space() may return NULL:
>
> That sounds like a bug, then, as skip_spaces immediately dereferences its
> argument, so it cannot possibly return NULL.
>
> Also, skip_spaces is never passed an argument that could possibly be NULL,
> so even if the function simply returns its argument the result cannot be
> NULL.
Try marking it up with __attribute__((returns_nonnull)) and/or
__attribute__((nonnull)). If the first one works, then it's a case where GCC
should suggest it, in which case it's bug 84203.
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Subject: [Bug target/87317] Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
Date: Sun, 16 Sep 2018 08:01:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
> (match_operand:DI 1 "nonimmediate_operand" "m,*m,m")
Does it have to come from memory, can't it also come from a (sub)register?
int f(__m64 x){
__m128i y = _mm_movpi64_epi64(x); // or harder _mm_set1_epi64(x)
__m128i z = _mm_cvtepu8_epi16(y);
return _mm_cvtsi128_si32(z);
}
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Subject: [Bug c++/87093] is_constructible (__is_constructible() instrinsic) explicitly instantiates conversion member function of source
Date: Sun, 16 Sep 2018 10:02:00 -0000
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--- Comment #8 from Tony E Lewis <TonyELewis at hotmail dot com> ---
Yep - verified on the GCC trunk on Godbolt ("9.0.0 20180915 (experimental)").
Fantastic stuff. Thanks very much Ville.
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Sun, 16 Sep 2018 10:25:00 -0000
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--- Comment #64 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
FYI, I am setting up a PowerPCSPE porterbox the next days and hope to get it
added to the gcc compile farm as a test machine. So any patches can be tested
there.
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86470] [6/7/8/9 Regression] [OOP] ICE with OMP
Date: Sun, 16 Sep 2018 10:30:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |janus at gcc dot gnu.org
Summary|ICE with OMP |[6/7/8/9 Regression] [OOP]
| |ICE with OMP
--- Comment #2 from janus at gcc dot gnu.org ---
I see the ICE with 5.5 and upwards, but not with 4.8.5.
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Subject: [Bug fortran/86470] [6/7/8/9 Regression] [OOP] ICE with OMP
Date: Sun, 16 Sep 2018 11:35:00 -0000
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--- Comment #3 from janus at gcc dot gnu.org ---
On current trunk I get the following backtrace:
internal compiler error: Segmentation fault
0xc71fdf crash_signal
/home/jweil/github/gcc/trunk/gcc/toplev.c:325
0x948110 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/home/jweil/github/gcc/trunk/gcc/tree.h:3226
0x948110 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/home/jweil/github/gcc/trunk/gcc/fold-const.c:2388
0x6cb4d6 gfc_call_malloc(stmtblock_t*, tree_node*, tree_node*)
/home/jweil/github/gcc/trunk/gcc/fortran/trans.c:605
0x6ddd87 duplicate_allocatable
/home/jweil/github/gcc/trunk/gcc/fortran/trans-array.c:8079
0x6ddfa5 gfc_duplicate_allocatable_nocopy(tree_node*, tree_node*, tree_node*,
int)
/home/jweil/github/gcc/trunk/gcc/fortran/trans-array.c:8172
0x74338f gfc_walk_alloc_comps
/home/jweil/github/gcc/trunk/gcc/fortran/trans-openmp.c:383
0x746052 gfc_omp_clause_default_ctor(tree_node*, tree_node*, tree_node*)
/home/jweil/github/gcc/trunk/gcc/fortran/trans-openmp.c:471
0xb549dc lower_rec_input_clauses
/home/jweil/github/gcc/trunk/gcc/omp-low.c:4104
It's strange that we run into 'gfc_walk_alloc_comps' at all, although no
allocatable components are involved. Possibly 'gfc_has_alloc_comps' is buggy?
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Subject: [Bug fortran/86551] [OOP] ICE on invalid code with select type
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--- Comment #4 from janus at gcc dot gnu.org ---
The patch in comment #3 shows lots of regressions in the testsuite, but this
one should be better:
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 85247dd8334..6cf816be511 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -6009,7 +6009,7 @@ copy_ts_from_selector_to_associate (gfc_expr *associate,
gfc_expr *selector)
else
assoc_sym->as = NULL;
- if (selector->ts.type == BT_CLASS)
+ if (selector->ts.type == BT_CLASS && gfc_expr_attr (selector).class_ok)
{
/* The correct class container has to be available. */
assoc_sym->ts.type = BT_CLASS;
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index ea0ce800743..67b625f3a51 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -8867,6 +8867,9 @@ resolve_select_type (gfc_code *code, gfc_namespace
*old_ns)
if (code->expr2)
{
+ if (!gfc_expr_attr (code->expr2).class_ok)
+ return;
+
if (code->expr1->symtree->n.sym->attr.untyped)
code->expr1->symtree->n.sym->ts = code->expr2->ts;
selector_type = CLASS_DATA (code->expr2)->ts.u.derived;
Unfortunately it still fails on:
FAIL: gfortran.dg/allocate_with_source_15.f03 -Os (internal compiler error)
FAIL: gfortran.dg/select_type_26.f03 -O0 (internal compiler error)
FAIL: gfortran.dg/select_type_27.f03 -O0 (internal compiler error)
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Subject: [Bug middle-end/87325] New: determine_base_object does not consider consider address space of base expr
Date: Sun, 16 Sep 2018 13:50:00 -0000
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Bug ID: 87325
Summary: determine_base_object does not consider consider
address space of base expr
Product: gcc
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Target Milestone: ---
determine_base_object fold_converts the result of build_fold_addr_expr to
ptr_type_node, and this causes wrong code if the addr expr is not in the
generic address space.
struct tagT {
float x, y, z;
};
const __memx struct tagT ts [3] = { {-1.0, 0.0, -1.0}, {-1.0, 0.0, -1.0},
{-1.0, 0.0, -1.0}};
volatile int n;
extern int foo(const float *a, const float *b);
extern float bar(float x, float y);
int main() {
float r;
for (int i = 0; i<n; ++i) {
r = bar(ts[i].x, ts[i].y);
if (foo (&r, &ts[i].z))
abort();
}
}
For the AVR target, the above code at -O2 causes induction variables to be
created for &ts + 12 and &ts + 16. Because of the above code, neither of them
is a const __memx float * though, which is what they should be.
Snip of *.ivopts
Selected IV set for loop 1 at float.c:14, 4 IVs:
candidate 4 (important)
var_before i_20
var_after i_14
original biv
type int
base 0
step 1
candidate 5
var_before ivtmp.9_22
var_after ivtmp.9_6
incremented before exit test
type <unnamed-unsigned:24>
base (<unnamed-unsigned:24>) ((const <address-space-7> float *) &ts + 8)
step 12
base object (void *) (&ts)
candidate 12
var_before ivtmp.16_25
var_after ivtmp.16_26
incremented at end
type unsigned short
base (unsigned short) (float *) (&ts + 16)
step 12
base object (void *) (float *) (&ts + 16)
candidate 14
var_before ivtmp.18_30
var_after ivtmp.18_31
incremented at end
type unsigned short
base (unsigned short) (float *) (&ts + 12)
step 12
base object (void *) (float *) (&ts + 12)
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Subject: [Bug fortran/85954] [8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:266
Date: Sun, 16 Sep 2018 14:55:00 -0000
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44701
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44701&action=edit
A fix for the PR
This regtests OK.
It needs one or two further tweaks before submission, which will occur
tomorrow.
Regards
Paul
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Subject: [Bug c/71157] -Wnull-dereference false alarm in wrong function
Date: Sun, 16 Sep 2018 16:13:00 -0000
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--- Comment #9 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Eric Gallager from comment #8)
> Try marking it up with __attribute__((returns_nonnull)) and/or
> __attribute__((nonnull)). If the first one works, then it's a case where GCC
> should suggest it, in which case it's bug 84203.
Neither suggestion works, unfortunately. That is, I tried undoing the
abovementioned patch to etags.c that works around the problem, and then
modifying the declaration of skip_spaces this way:
static char *skip_spaces (char *) __attribute__ ((nonnull (1)));
or this way:
static char *skip_spaces (char *) __attribute__ ((returns_nonnull));
Neither modification worked: in both cases I still got the bogus warnings. This
was with gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0.
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Subject: [Bug c/71157] -Wnull-dereference false alarm in wrong function
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #10 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Martin, this is one of those warnings that would benefit from printing the
inline stack (and also from better location info in the middle).
>From gcc-bugs-return-615405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 16:36:45 2018
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Subject: [Bug c/26492] -Wstrict-aliasing=2 warns about explicitly allowed cast to pointer to union.
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|i486-linux-gnu |
Status|UNCONFIRMED |NEW
Keywords| |diagnostic
Last reconfirmed| |2018-09-16
CC| |manu at gcc dot gnu.org
Host|i486-linux-gnu |
Ever confirmed|0 |1
Build|i486-linux-gnu |
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
<source>:13:20: warning: dereferencing type-punned pointer might break
strict-aliasing rules [-Wstrict-aliasing]
4 | (((union { type __x__; __typeof__(*(ptr)) __y__;} *)(ptr))->__x__)
| ~~~~~
....
13 | noalias(usa, &a)[1] = 0;
<source>:4:58: note: in definition of macro 'noalias'
4 | (((union { type __x__; __typeof__(*(ptr)) __y__;} *)(ptr))->__x__)
| ^~~
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Subject: [Bug other/33933] "error: array type has incomplete element type" in system header
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This is old and likely to be either fixed or irrelevant by now. Please REOPEN
otherwise.
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Subject: [Bug middle-end/34515] -Wstrict-overflow produces extra warnings
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This is too large to analyze and it doesn't compile cleanly:
strtod_l.c:1318:8: error: lvalue required in asm statement
strtod_l.c:1318:8: error: lvalue required in asm statement
I don't think it is useful to keep it around. Better focus on other
-Wstrict-overflow PRs.
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Subject: [Bug middle-end/42561] missing uninitialized variable warning on simple arrays
Date: Sun, 16 Sep 2018 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42561
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This issue is already covered and analyzed in PR49754
*** This bug has been marked as a duplicate of bug 49754 ***
>From gcc-bugs-return-615410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:03:48 2018
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Subject: [Bug middle-end/49754] Wuninitialized does not work with structs/unions/arrays
Date: Sun, 16 Sep 2018 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49754
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |matt at use dot net
--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 42561 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 16:56:42 2018
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Subject: [Bug c/71157] -Wnull-dereference false alarm in wrong function
Date: Sun, 16 Sep 2018 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71157
--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
Trunk doesn't show the warning (gcc-8 does).
>From gcc-bugs-return-615412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:11:50 2018
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Subject: [Bug middle-end/63418] false positive with -Wmaybe-uninitialized
Date: Sun, 16 Sep 2018 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63418
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Keeping this open is not very useful:
* The testcase is too large to analyze to know the root cause.
* It is not a regression.
* It may not be a bug but an implementation limit due to compile-time
constraints.
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Subject: [Bug middle-end/24639] [meta-bug] bug to track all Wuninitialized issues
Date: Sun, 16 Sep 2018 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
Bug 24639 depends on bug 42561, which changed state.
Bug 42561 Summary: missing uninitialized variable warning on simple arrays
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42561
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Subject: [Bug middle-end/24639] [meta-bug] bug to track all Wuninitialized issues
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
Bug 24639 depends on bug 63418, which changed state.
Bug 63418 Summary: false positive with -Wmaybe-uninitialized
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63418
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>From gcc-bugs-return-615414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:18:14 2018
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Subject: [Bug middle-end/78081] -Wmaybe-initialized false-alarm regression for Emacs regex.c (jump threading fallout)
Date: Sun, 16 Sep 2018 17:18:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-04-28 00:00:00 |2018-9-16
CC| |manu at gcc dot gnu.org
Summary|-Wmaybe-initialized |-Wmaybe-initialized
|false-alarm regression for |false-alarm regression for
|Emacs regex.c |Emacs regex.c (jump
| |threading fallout)
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Still valid. Probably also a missed optimization?
>From gcc-bugs-return-615415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:18:23 2018
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Subject: [Bug middle-end/78915] missing -Wuninitialized accessing allocated memory
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Possibly a dup of PR87209
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Subject: [Bug c++/43789] warn about pointer arithmetic in sizeof (Wsizeof-array-decay)
Date: Sun, 16 Sep 2018 17:33:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-16
CC| |manu at gcc dot gnu.org
Summary|warn about pointer |warn about pointer
|arithmetic in sizeof |arithmetic in sizeof
| |(Wsizeof-array-decay)
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Testcase:
int foo(void){
char a[]="blabla";
return sizeof(a-1);
}
Clang:
<source>:4:16: warning: sizeof on pointer operation will return size of 'char
*' instead of 'char [7]' [-Wsizeof-array-decay]
return sizeof(a-1);
~^
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Subject: [Bug c++/49481] Warn about string literal + character
Date: Sun, 16 Sep 2018 17:33:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Dup
*** This bug has been marked as a duplicate of bug 62181 ***
>From gcc-bugs-return-615419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:35:49 2018
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Subject: [Bug c++/78679] Produce a warning on `int + string literal`
Date: Sun, 16 Sep 2018 17:35:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
So this is a dup.
*** This bug has been marked as a duplicate of bug 62181 ***
>From gcc-bugs-return-615418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:33:24 2018
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Subject: [Bug c++/62181] [C/C++] Expected new warning: "adding 'char' to a string does not append to the string" [-Wstring-plus-int]
Date: Sun, 16 Sep 2018 17:35:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |veksler at il dot ibm.com
--- Comment #12 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 49481 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:35:51 2018
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Subject: [Bug c++/62181] [C/C++] Expected new warning: "adding 'char' to a string does not append to the string" [-Wstring-plus-int]
Date: Sun, 16 Sep 2018 17:46:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |vittorio.romeo at outlook dot com
--- Comment #13 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 78679 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:46:30 2018
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Subject: [Bug c/85948] printf format attribute warning line carat inaccurate
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This works for me with all versions I have tried starting with GCC 6.1 (only in
C). In GCC 8.1:
<source>:13:11: error: format '%s' expects argument of type 'char *', but
argument 2 has type 'int' [-Werror=format=]
str_fmt("%s %zu %s %s", d, str, str, d);
~^ ~
%d
<source>:13:15: error: format '%zu' expects argument of type 'size_t', but
argument 3 has type 'const char *' [-Werror=format=]
str_fmt("%s %zu %s %s", d, str, str, d);
~~^ ~~~
%s
<source>:13:21: error: format '%s' expects argument of type 'char *', but
argument 5 has type 'int' [-Werror=format=]
str_fmt("%s %zu %s %s", d, str, str, d);
~^ ~
%d
It doesn't work in C++.
>From gcc-bugs-return-615422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 17:57:42 2018
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Subject: [Bug c/52952] Wformat location info is bad (wrong column number)
Date: Sun, 16 Sep 2018 19:38:00 -0000
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--- Comment #51 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
There are few things still that don't work:
1. C++ does not work
2. Locations within strings expanded from a macro
3. Location within strings from a const char array.
void foo(void) {
#define c " %d %d "
__builtin_printf(c, 0.5, 0);
const char a[] = " %d ";
__builtin_printf(a, 0.5);
}
GCC 9:
<source>:2:25: error: format '%d' expects argument of type 'int', but argument
2 has type 'double' [-Werror=format=]
2 | #define c " %d %d "
| ^~~~~~~~~
<source>:3:20: note: in expansion of macro 'c'
3 | __builtin_printf(c, 0.5, 0);
| ^
<source>:6:20: error: format '%d' expects argument of type 'int', but argument
2 has type 'double' [-Werror=format=]
6 | __builtin_printf(a, 0.5);
| ^ ~~~
| |
| double
Clang can do (3) but not (2):
<source>:3:23: error: format specifies type 'int' but the argument has type
'double' [-Werror,-Wformat]
__builtin_printf(c, 0.5, 0);
~ ^~~
<source>:6:23: error: format specifies type 'int' but the argument has type
'double' [-Werror,-Wformat]
__builtin_printf(a, 0.5);
~ ^~~
<source>:5:22: note: format string is defined here
const char a[] = " %d ";
^~
%f
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Subject: [Bug fortran/37802] Improve wording for matmul bound checking
Date: Sun, 16 Sep 2018 19:42:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Sep 16 19:37:44 2018
New Revision: 264349
URL: https://gcc.gnu.org/viewcvs?rev=264349&root=gcc&view=rev
Log:
2018-09-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/37802
* frontend-passes.c (B_ERROR): New macro for matmul bounds
checking error messages.
(C_ERROR): Likewise.
(inline_matmul_assign): Reorganize bounds checking, use B_ERROR
and C_ERROR macros.
2018-09-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/37802
* gfortran.dg/matmul_bounds_13.f90: New test case.
* gfortran.dg/inline_matmul_15.f90: Adjust test for runtime
error.
* gfortran.dg/matmul_5.f90: Likewise.
* gfortran.dg/matmul_bounds_10.f90: Likewise.
* gfortran.dg/matmul_bounds_11.f90: Likewise.
* gfortran.dg/matmul_bounds_2.f90: Likewise.
* gfortran.dg/matmul_bounds_4.f90: Likewise.
* gfortran.dg/matmul_bounds_5.f90: Likewise.
2018-09-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/37802
* m4/matmul_internal.m4: Adjust error messages.
* generated/matmul_c10.c: Regenerated.
* generated/matmul_c16.c: Regenerated.
* generated/matmul_c4.c: Regenerated.
* generated/matmul_c8.c: Regenerated.
* generated/matmul_i1.c: Regenerated.
* generated/matmul_i16.c: Regenerated.
* generated/matmul_i2.c: Regenerated.
* generated/matmul_i4.c: Regenerated.
* generated/matmul_i8.c: Regenerated.
* generated/matmul_r10.c: Regenerated.
* generated/matmul_r16.c: Regenerated.
* generated/matmul_r4.c: Regenerated.
* generated/matmul_r8.c: Regenerated.
* generated/matmulavx128_c10.c: Regenerated.
* generated/matmulavx128_c16.c: Regenerated.
* generated/matmulavx128_c4.c: Regenerated.
* generated/matmulavx128_c8.c: Regenerated.
* generated/matmulavx128_i1.c: Regenerated.
* generated/matmulavx128_i16.c: Regenerated.
* generated/matmulavx128_i2.c: Regenerated.
* generated/matmulavx128_i4.c: Regenerated.
* generated/matmulavx128_i8.c: Regenerated.
* generated/matmulavx128_r10.c: Regenerated.
* generated/matmulavx128_r16.c: Regenerated.
* generated/matmulavx128_r4.c: Regenerated.
* generated/matmulavx128_r8.c: Regenerated.
Added:
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_13.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/inline_matmul_15.f90
trunk/gcc/testsuite/gfortran.dg/matmul_5.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_10.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_11.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_2.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_3.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_4.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_5.f90
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_8.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/matmul_c10.c
trunk/libgfortran/generated/matmul_c16.c
trunk/libgfortran/generated/matmul_c4.c
trunk/libgfortran/generated/matmul_c8.c
trunk/libgfortran/generated/matmul_i1.c
trunk/libgfortran/generated/matmul_i16.c
trunk/libgfortran/generated/matmul_i2.c
trunk/libgfortran/generated/matmul_i4.c
trunk/libgfortran/generated/matmul_i8.c
trunk/libgfortran/generated/matmul_r10.c
trunk/libgfortran/generated/matmul_r16.c
trunk/libgfortran/generated/matmul_r4.c
trunk/libgfortran/generated/matmul_r8.c
trunk/libgfortran/generated/matmulavx128_c10.c
trunk/libgfortran/generated/matmulavx128_c16.c
trunk/libgfortran/generated/matmulavx128_c4.c
trunk/libgfortran/generated/matmulavx128_c8.c
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trunk/libgfortran/generated/matmulavx128_i2.c
trunk/libgfortran/generated/matmulavx128_i4.c
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trunk/libgfortran/generated/matmulavx128_r4.c
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trunk/libgfortran/m4/matmul_internal.m4
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Subject: [Bug fortran/84543] [OOP] undefined reference to __copy_INTEGER_4_.3788
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----------------------------------------------------------------------------
Keywords| |link-failure
Status|NEW |ASSIGNED
CC| |janus at gcc dot gnu.org
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Target Milestone|--- |9.0
Summary|undefined reference to |[OOP] undefined reference
|__copy_INTEGER_4_.3788 |to __copy_INTEGER_4_.3788
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
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Subject: [Bug fortran/84543] [OOP] undefined reference to __copy_INTEGER_4_.3788
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84543
--- Comment #2 from janus at gcc dot gnu.org ---
Author: janus
Date: Sun Sep 16 19:57:52 2018
New Revision: 264350
URL: https://gcc.gnu.org/viewcvs?rev=264350&root=gcc&view=rev
Log:
fix PR 86484 and PR 84543
2018-09-16 Janus Weil <janus@gcc.gnu.org>
PR fortran/86484
PR fortran/84543
* match.c (gfc_match_assignment): For a polymorphic assignment,
make sure that the vtab for the rhs type is generated.
2018-09-16 Janus Weil <janus@gcc.gnu.org>
PR fortran/86484
PR fortran/84543
* gfortran.dg/class_assign_2.f90: New test case.
* gfortran.dg/class_assign_3.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/class_assign_2.f90
trunk/gcc/testsuite/gfortran.dg/class_assign_3.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/match.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
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--- Comment #6 from janus at gcc dot gnu.org ---
Author: janus
Date: Sun Sep 16 19:57:52 2018
New Revision: 264350
URL: https://gcc.gnu.org/viewcvs?rev=264350&root=gcc&view=rev
Log:
fix PR 86484 and PR 84543
2018-09-16 Janus Weil <janus@gcc.gnu.org>
PR fortran/86484
PR fortran/84543
* match.c (gfc_match_assignment): For a polymorphic assignment,
make sure that the vtab for the rhs type is generated.
2018-09-16 Janus Weil <janus@gcc.gnu.org>
PR fortran/86484
PR fortran/84543
* gfortran.dg/class_assign_2.f90: New test case.
* gfortran.dg/class_assign_3.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/class_assign_2.f90
trunk/gcc/testsuite/gfortran.dg/class_assign_3.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/match.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/37802] Improve wording for matmul bound checking
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/27766] [meta-bug] -fbounds-check related bugs
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Bug 27766 depends on bug 37802, which changed state.
Bug 37802 Summary: Improve wording for matmul bound checking
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37802
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug fortran/87326] New: Support the NEW_INDEX= specifier in the FORM TEAM statement
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87326
Bug ID: 87326
Summary: Support the NEW_INDEX= specifier in the FORM TEAM
statement
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
gfortran 8.2 does not accept the NEW_INDEX= specifier of the (Fortran 2018)
FORM TEAM statement. The following example is note 11.48 from N2146, modified
to define & initialize P & have an END PROGRAM statement:
$ cat note-11.48.f90
USE, INTRINSIC :: ISO_FORTRAN_ENV
integer, parameter :: P = 8
TYPE(TEAM_TYPE) :: ROW
REAL :: A [P, *]
INTEGER :: ME (2)
ME (:) = THIS_IMAGE (A)
FORM TEAM (ME(1), ROW, NEW_INDEX=ME(2))
end program
$ gfortran-mp-8 -fcoarray=single note-11.48.f90
note-11.48.f90:7:21:
FORM TEAM (ME(1), ROW, NEW_INDEX=ME(2))
1
Error: Syntax error in FORM TEAM statement at (1)
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Subject: [Bug fortran/84543] [OOP] undefined reference to __copy_INTEGER_4_.3788
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janus at gcc dot gnu.org changed:
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--- Comment #3 from janus at gcc dot gnu.org ---
Fixed on 9-trunk with r264350. Closing.
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sun, 16 Sep 2018 20:22:00 -0000
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--- Comment #7 from janus at gcc dot gnu.org ---
Fixed on 9-trunk with r264350. Closing.
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Subject: [Bug fortran/86484] [OOP] Undefined symbol when using polymorphic intrinsic assignment
Date: Sun, 16 Sep 2018 20:31:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #8 from janus at gcc dot gnu.org ---
Actually closing.
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Sun, 16 Sep 2018 21:11:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #3)
> Created attachment 44700 [details]
> Revised dtio_1.f90
>
> Will this attached version suffice?
Looks good at first sight. Will try ifort 19 on it soon, in order to see if it
runs as expected.
Do you think it's feasible to add some sort of diagnostics for this problem? Or
should we rather follow ifort's approach and enforce this restriction without
diagnostic messages? That would probably require a wrapper around the DTIO
procedures that would enforce the restrictions, right?
>From gcc-bugs-return-615435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 16 21:11:58 2018
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Sun, 16 Sep 2018 21:25:00 -0000
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to janus from comment #4)
> (In reply to Jerry DeLisle from comment #3)
> > Created attachment 44700 [details]
> > Revised dtio_1.f90
> >
> > Will this attached version suffice?
>
> Looks good at first sight. Will try ifort 19 on it soon, in order to see if
> it runs as expected.
>
> Do you think it's feasible to add some sort of diagnostics for this problem?
> Or should we rather follow ifort's approach and enforce this restriction
> without diagnostic messages? That would probably require a wrapper around
> the DTIO procedures that would enforce the restrictions, right?
My interpretation is that this is a requirement on the user. Amy diagnostics we
add at run time will be a performance hit. I do want to learn what ifort is
doing, I do not have it installed at the moment.
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
Date: Sun, 16 Sep 2018 21:32:00 -0000
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--- Comment #15 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Author: hp
Date: Sun Sep 16 21:23:36 2018
New Revision: 264351
URL: https://gcc.gnu.org/viewcvs?rev=264351&root=gcc&view=rev
Log:
PR target/85666
* config/mmix/mmix.c (mmix_assemble_integer): Handle byte-size
non-CONST_INT rtx:es using assemble_integer_with_op ".byte".
(MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS): Don't call
leaf_function_p, instead use has_hard_reg_initial_val.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/mmix/mmix.c
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Subject: [Bug target/87317] Missed optimisation: merging VMOVQ with operations that only use the low 8 bytes
Date: Sun, 16 Sep 2018 21:40:00 -0000
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 44702
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44702&action=edit
A patch
Please try this.
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Subject: [Bug target/85666] gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488
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Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|9.0 |8.3
--- Comment #16 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Now fixed on the gcc-8 branch too, and will be included in the 8.3 release.
Thanks for your patience.
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Subject: [Bug c++/87322] [GCC 8.1+] GCC fails to parse captured lambda of 2nd inner lambda if the captured lambda has "," (having 2 arguments)
Date: Mon, 17 Sep 2018 05:45:00 -0000
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ensadc at mailnesia dot com changed:
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----------------------------------------------------------------------------
CC| |ensadc at mailnesia dot com
--- Comment #1 from ensadc at mailnesia dot com ---
Reduced:
int main()
{
[](auto x) {
[inner_func2 = [] (auto a, auto b) {} ] {};
}(0);
}
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Subject: [Bug c++/87327] New: Calling member functions on captured constexpr variables "is not a constant expression"
Date: Mon, 17 Sep 2018 06:51:00 -0000
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Bug ID: 87327
Summary: Calling member functions on captured constexpr
variables "is not a constant expression"
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
The following code fails to compile on GCC 8.1.0 and above, but compiles fine
on GCC 7.3 and Clang (https://godbolt.org/z/ACYBBt). This bug doesn't happen if
`size` is a member variable instead of a member function, and it doesn't happen
when using an `int` for `a` and just writing `Foo<a>` instead of
`Foo<a.size()>`.
Command: g++ -std=c++17 bug.cpp
template <int N>
struct Foo {
constexpr auto size() const {
return N;
}
};
constexpr void foo() {
constexpr auto a = Foo<5>{};
[&] {
Foo<a.size()> it = {};
return it;
}();
}
Error message:
bug.cpp: In lambda function:
bug.cpp:12:21: error: ‘__closure’ is not a constant expression
Foo<a.size()> it = {};
^
bug.cpp:12:19: note: in template argument for type ‘int’
Foo<a.size()> it = {};
~~~~~~^~
System info (g++ -v):
Using built-in specs.
COLLECT_GCC=g++-8
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.1.0-5ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.1.0 (Ubuntu 8.1.0-5ubuntu1~16.04)
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87328] New: [9 Regression] ICE in do_rpo_vn, at tree-ssa-sccvn.c:6566
Date: Mon, 17 Sep 2018 07:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87328
Bug ID: 87328
Summary: [9 Regression] ICE in do_rpo_vn, at
tree-ssa-sccvn.c:6566
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180916 snapshot (r264351) ICEs when compiling the following
snippet w/ -O1 (-Og) -fno-tree-ccp -fno-tree-forwprop:
void
tp (void)
{
int qt;
qt = 0;
if (qt != 0)
{
if (0)
{
h5:
qt = 0;
while (qt < 1)
{
}
}
++qt;
}
goto h5;
}
% gcc-9.0.0-alpha20180916 -O1 -fno-tree-ccp -fno-tree-forwprop -c hyr6b31a.c
during GIMPLE pass: fre
hyr6b31a.c: In function 'tp':
hyr6b31a.c:22:1: internal compiler error: in do_rpo_vn, at
tree-ssa-sccvn.c:6566
22 | }
| ^
0x6a712b do_rpo_vn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-ssa-sccvn.c:6566
0xe7946c execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-ssa-sccvn.c:6726
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Subject: [Bug fortran/85954] [8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:266
Date: Mon, 17 Sep 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85954
--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Sep 17 07:18:17 2018
New Revision: 264358
URL: https://gcc.gnu.org/viewcvs?rev=264358&root=gcc&view=rev
Log:
2018-09-17 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85954
* resolve.c (resolve_assoc_var): If the target expression is a
deferred charlen dummy and the associate name shares the
charlen, generate a new one. Make sure that new charlens are in
the namespace list so that they get cleaned up.
* trans-array.c (gfc_is_reallocatable_lhs): Associate names are
not reallocatable.
* trans-decl.c (gfc_get_symbol_decl): Put deferred character
length dummy and result arrays on the deferred initialization
list so that the variable length arrays can be correctly dealt
with.
* trans-expr.c (gfc_conv_string_length): Return if 'expr' is
NULL rather than ICEing..
2018-09-17 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85954
* gfortran.dg/deferred_character_21.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/deferred_character_21.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 08:33:14 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87329] New: ICE in patch_jump_insn, at cfgrtl.c:1271
Date: Mon, 17 Sep 2018 08:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87329
Bug ID: 87329
Summary: ICE in patch_jump_insn, at cfgrtl.c:1271
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-linux-gnu, ppc64le-linux-gnu
Following causes ICE:
$ aarch64-suse-linux-gcc
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr47355.C -fmodulo-sched
-O -freorder-blocks-and-partition
during RTL pass: sms
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr47355.C: In function
'void foo()':
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr47355.C:39:1: internal
compiler error: in patch_jump_insn, at cfgrtl.c:1271
}
^
0x7ffff6b9afea __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86659] [9 regression] gnat.dg/sso/q[23].adb FAIL
Date: Mon, 17 Sep 2018 08:34:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-17
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Still present in 64-bit mode.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86659] [9 regression] gnat.dg/sso/q[23].adb FAIL
Date: Mon, 17 Sep 2018 08:38:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87330] New: ICE in scan_rtx_reg, at regrename.c:1097
Date: Mon, 17 Sep 2018 08:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87330
Bug ID: 87330
Summary: ICE in scan_rtx_reg, at regrename.c:1097
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-linux-gnu
Following ICEs:
$ aarch64-linux-gnu-gcc -mtune=qdf24xx -fno-schedule-insns2 -O3
-funroll-all-loops
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/char_eoshift_4.f90
during RTL pass: tag_collision_avoidance
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/char_eoshift_4.f90:39:0:
39 | call test (eoshift (a, shift4, dim = 2), .false.)
|
internal compiler error: in scan_rtx_reg, at regrename.c:1097
0x5d26dd scan_rtx_reg
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/regrename.c:1096
0xaa674f scan_rtx
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/regrename.c:1424
0xaa674f record_out_operands
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/regrename.c:1603
0xaa7967 build_def_use
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/regrename.c:1864
0xaa7967 regrename_analyze(bitmap_head*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/regrename.c:742
0xdf22ee execute_tag_collision_avoidance()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/config/aarch64/falkor-tag-collision-avoidance.c:812
0xdf36f8 pass_tag_collision_avoidance::execute(function*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/config/aarch64/falkor-tag-collision-avoidance.c:869
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug target/87330] ICE in scan_rtx_reg, at regrename.c:1097
Date: Mon, 17 Sep 2018 08:46:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |siddhesh at gotplt dot org
--- Comment #1 from ktkachov at gcc dot gnu.org ---
CC'ing Siddhesh as this is in the new Falkor pass.
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44703
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44703&action=edit
Patch for the PR
This rather trivial patch fixes the PR.
Paul
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Subject: [Bug libgomp/87140] Segmentation fault in priority_list_upgrade_task function when execution tasks with priority
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Last reconfirmed| |2018-09-17
Resolution|FIXED |---
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not really fixed in GCC sources though.
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Subject: [Bug tree-optimization/87328] [9 Regression] ICE in do_rpo_vn, at tree-ssa-sccvn.c:6566
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-17
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r264273.
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Subject: [Bug gcov-profile/85871] g++.dg/gcov/gcov-8.C random failures
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
I found root cause of it, I'm testing patch for it.
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Subject: [Bug c++/87322] [8/9 Regression] GCC fails to parse captured lambda of 2nd inner lambda if the captured lambda has "," (having 2 arguments)
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-09-17
Ever confirmed|0 |1
Summary|[GCC 8.1+] GCC fails to |[8/9 Regression] GCC fails
|parse captured lambda of |to parse captured lambda of
|2nd inner lambda if the |2nd inner lambda if the
|captured lambda has "," |captured lambda has ","
|(having 2 arguments) |(having 2 arguments)
Target Milestone|--- |8.3
Known to fail| |8.2.0, 9.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Regression started with r251433 "Reimplement handling of lambdas in templates."
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Subject: [Bug c++/87300] -Wredundant-move gives false positives in C++11 mode
Date: Mon, 17 Sep 2018 09:32:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Sorry you're right, I forgot we're talking about the converting case here. The
move doesn't prevent elision (because elision isn't possible here).
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Subject: [Bug c++/87327] [8/9 Regression] Calling member functions on captured constexpr variables "is not a constant expression"
Date: Mon, 17 Sep 2018 10:04:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-17
CC| |jason at gcc dot gnu.org
Known to work| |7.3.0
Target Milestone|--- |8.3
Summary|Calling member functions on |[8/9 Regression] Calling
|captured constexpr |member functions on
|variables "is not a |captured constexpr
|constant expression" |variables "is not a
| |constant expression"
Ever confirmed|0 |1
Known to fail| |8.2.0, 9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Regression started with r253266:
PR c++/56973, DR 696 - capture constant variables only as needed.
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Subject: [Bug fortran/87239] ICE in deferred-length string
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #4)
> Duplicate of/ related to pr77325 and pr84109.
PR84109 is completely different. The array descriptor 'elem_len' is being set
to zero during the allocation.
PR77325 is also not related. It appears that the vla type is not being
registered so that the gimplifier is cannot determine the space allocation.
In this PR, the code is OK but in the wrong order. The call to gettwo uses
'S.2' and 'str.3' before they are declared.
I will take this one and will come back to the other two when I am done.
Paul
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Subject: [Bug fortran/86470] [6/7/8/9 Regression] [OOP] ICE with OMP
Date: Mon, 17 Sep 2018 10:11:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The !$ use omp_lib
line isn't really needed.
Started to ICE with r211397.
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Subject: [Bug c/87311] missing integer overflow detection on negation of the minimum value with -ftrapv or UB sanitizer
Date: Mon, 17 Sep 2018 10:11:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think the current behavior is "by design", beside match.pd frontends do some
opportunistic folding on their own, and neither try hard to avoid concealing
overflow that would be caught by ubsan.
I hope it can change though, with mandatory folding (required by language
standards, e.g. constant expressions) and opportunistic folding for
optimization cleanly separated.
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Subject: [Bug c++/87331] New: if delete "node->operator_type = kADD;" will report "internal compiler error: Segmentation fault"
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Bug ID: 87331
Summary: if delete "node->operator_type = kADD;" will report
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Product: gcc
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Subject: [Bug c++/87331] if delete "node->operator_type = kADD;" will report "internal compiler error: Segmentation fault"
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please read https://gcc.gnu.org/bugs/ and provide the requested information.
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Subject: [Bug gcov-profile/85871] [8/9 Regression] g++.dg/gcov/gcov-8.C random failures
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Sep 17 10:19:02 2018
New Revision: 264363
URL: https://gcc.gnu.org/viewcvs?rev=264363&root=gcc&view=rev
Log:
Fix out-of-bounds in gcov.c (PR gcov-profile/85871).
2018-09-17 Martin Liska <mliska@suse.cz>
PR gcov-profile/85871
* gcov.c (output_intermediate_file): Fix out of bounds
access.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gcov.c
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Subject: [Bug tree-optimization/87301] [9 Regression] ICE: verify_gimple failed (error: statement marked for throw, but doesn't)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug gcov-profile/85871] [8/9 Regression] g++.dg/gcov/gcov-8.C random failures
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Known to fail|9.0 |
--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/87301] [9 Regression] ICE: verify_gimple failed (error: statement marked for throw, but doesn't)
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 17 10:21:21 2018
New Revision: 264364
URL: https://gcc.gnu.org/viewcvs?rev=264364&root=gcc&view=rev
Log:
2018-09-17 Richard Biener <rguenther@suse.de>
PR tree-optimization/87301
* tree-ssa-sccvn.c (eliminate_dom_walker::eliminate_cleanup): Properly
clean EH info from leftover copy assignments.
* gcc.dg/torture/pr87301.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87301.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87328] [9 Regression] ICE in do_rpo_vn, at tree-ssa-sccvn.c:6566
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug testsuite/87304] [9 regression] gcc.dg/vect/bb-slp-over-widen-1.c fails starting with r262371
Date: Mon, 17 Sep 2018 10:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-615466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:35:59 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Mon, 17 Sep 2018 10:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |dmalcolm at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|Spurious note: messages |[9 Regression] Spurious
|when building with |note: messages when
|-fopt-info-vec-optimized |building with
| |-fopt-info-vec-optimized
>From gcc-bugs-return-615467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:39:22 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87311] missing integer overflow detection on negation of the minimum value with -ftrapv or UB sanitizer
Date: Mon, 17 Sep 2018 10:44:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yes, I think we have quite some opportunistic replacement of traps by "correct"
results (according to twos complement). -ftrapv is not getting much love and
generally we recommend to use sanitizers these days. Elsewhere it was
suggested
to lower -ftrapv code to __builtin_()s.
>From gcc-bugs-return-615468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:44:38 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87313] attribute malloc not used for alias analysis when it could be
Date: Mon, 17 Sep 2018 10:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
You fail to see that g may clobber *p because p points to global memory. GCC
knwos that malloc doesn't do such clobbering but you didn't tell GCC that g
does not (looks like you actually can't do that right now).
>From gcc-bugs-return-615470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:50:13 2018
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Mon, 17 Sep 2018 10:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks very much related to PR63155. Lots of setjmp calls in the testcase.
Use -ftree-coalesce-vars when not optimizing.
*** This bug has been marked as a duplicate of bug 63155 ***
>From gcc-bugs-return-615469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:47:58 2018
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Subject: [Bug tree-optimization/87314] pointless comparison of malloc result to a string not eliminated
Date: Mon, 17 Sep 2018 10:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-17
CC| |rguenth at gcc dot gnu.org
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is in ptrs_compare_unequal () which is limited because points-to
analysis doesn't conservatively propagate NULL and also because it doesn't
handle STRING_CST (similar reason, we drop all pointed-to-readonly-string).
>From gcc-bugs-return-615471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:50:15 2018
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
Date: Mon, 17 Sep 2018 10:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david at pgmasters dot net
--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 87316 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:52:13 2018
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Subject: [Bug middle-end/87319] When vector is wrapped, expression is not optimized.
Date: Mon, 17 Sep 2018 10:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization,
| |wrong-code
CC| |rguenth at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Two issues then. Note the fold-const.c code is considered premature
optimization...
>From gcc-bugs-return-615473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 10:54:26 2018
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Subject: [Bug tree-optimization/87320] [8/9 Regression] Last iteration of vectorized loop not executed when peeling for gaps
Date: Mon, 17 Sep 2018 11:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |wrong-code
Last reconfirmed| |2018-09-17
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Last iteration of |[8/9 Regression] Last
|vectorized loop not |iteration of vectorized
|executed when peeling for |loop not executed when
|gaps |peeling for gaps
Target Milestone|--- |8.3
Known to fail| |8.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug c/87311] missing integer overflow detection on negation of the minimum value with -ftrapv or UB sanitizer
Date: Mon, 17 Sep 2018 11:23:00 -0000
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--- Comment #4 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Richard Biener from comment #3)
> Yes, I think we have quite some opportunistic replacement of traps by
> "correct" results (according to twos complement).
Yes, that's "correct" according to two's complement, but this may also be a
real overflow that should have been caught (assuming -fwrapv hasn't been
provided).
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Subject: [Bug fortran/64120] [F03] Wrong handling of allocatable character string
Date: Mon, 17 Sep 2018 11:34:00 -0000
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Sep 17 11:22:27 2018
New Revision: 264365
URL: https://gcc.gnu.org/viewcvs?rev=264365&root=gcc&view=rev
Log:
2018-09-17 Paul Thomas <pault@gcc.gnu.org>
PR fortran/64120
* trans-decl.c (gfc_get_symbol_decl): Flag allocatable, scalar
characters with a variable length expression for deferred init.
(gfc_trans_deferred_vars): Perform the assignment for these
symbols by calling gfc_conv_string_length.
2018-09-17 Paul Thomas <pault@gcc.gnu.org>
PR fortran/64120
* gfortran.dg/allocatable_scalar_14.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocatable_scalar_14.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/64120] [F03] Wrong handling of allocatable character string
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk. It only took 4 years :-(
What are you up to these days, FX?
Paul
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Subject: [Bug c++/86001] explicit default constructor not allowed in anonymous aggregate
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Raphael Kubo da Costa <raphael.kubo.da.costa at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |raphael.kubo.da.costa@intel
| |.com
--- Comment #1 from Raphael Kubo da Costa <raphael.kubo.da.costa at intel dot com> ---
This looks similar to bug 77314.
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Subject: [Bug web/86315] Bugzilla: add "cc count" and "duplicate count" columns
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Is there please any update?
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Subject: [Bug libstdc++/83601] std::regex_replace C++14 conformance issue: escaping in SED mode
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Dominik Haumann <dhaumann at kde dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dhaumann at kde dot org
--- Comment #4 from Dominik Haumann <dhaumann at kde dot org> ---
If there is interest, another (smaller) test case would be:
const std::string input = R"((.))";
const std::string expected = R"(\(\.\))";
const std::string obtained_std = std::regex_replace(input,
std::regex(R"([.^$|()\[\]{}*+?\\])"), R"(\\&)",
std::regex_constants::match_default |
std::regex_constants::format_sed);
const std::string obtained_boost = boost::regex_replace(input,
boost::regex(R"([.^$|()\[\]{}*+?\\])"), R"(\\&)",
boost::regex_constants::match_default |
boost::regex_constants::format_sed);
std::cout << "expected.......='" << expected << "'" << std::endl;
std::cout << "obtained(std)..='" << obtained_std << "'" << std::endl;
std::cout << "obtained(boost)='" << obtained_boost << "'" << std::endl;
Output with GCC < 8:
expected.......='\(\.\)'
obtained(std)..='\\(\\(\\.\\)\\)'
obtained(boost)='\(\(\.\)\)'
With GCC >= 8, it works and it's the same as with boost.
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Subject: [Bug other/87332] New: Issues related to Identical Code Folding (ICF)
Date: Mon, 17 Sep 2018 13:11:00 -0000
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Bug ID: 87332
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Subject: [Bug c++/87333] New: A stack overflow problem for c++filt
Date: Mon, 17 Sep 2018 13:17:00 -0000
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Bug ID: 87333
Summary: A stack overflow problem for c++filt
Product: gcc
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Created attachment 44704
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44704&action=edit
c++filt < POC
We have found some stack overflow in c++filt of the latest binutils code base.
Here are the POC files with different kinds of stack overflow.
Please use the “c++filt < POC †to reproduce the bug.
Please check it and debug it.
Thank you very much.
ASAN output:
(1)binutils-2.31/build/bin$ ./c++filt < POC1
ASAN:DEADLYSIGNAL
=================================================================
==7555==ERROR: AddressSanitizer: stack-overflow on address 0x7fffefbe1f48 (pc
0x0000009566e8 bp 0x7fffefbe2140 sp 0x7fffefbe1f48 T0)
#0 0x9566e7 (/mnt/d/Project/binutils-2.31/build/bin/c++filt+0x9566e7)
#1 0xcccf00 (/mnt/d/Project/binutils-2.31/build/bin/c++filt+0xcccf00)
SUMMARY: AddressSanitizer: stack-overflow
(/mnt/d/Project/binutils-2.31/build/bin/c++filt+0x9566e7)
==7555==ABORTING
Aborted (core dumped)
(2)binutils-2.31/build/bin$ ./c++filt < POC2
ASAN:DEADLYSIGNAL
=================================================================
==14325==ERROR: AddressSanitizer: stack-overflow on address 0x7fffdbe5dff8 (pc
0x7f9d75b4364f bp 0x000000000018 sp 0x7fffdbe5dfe0 T0)
#0 0x7f9d75b4364e (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x10364e)
#1 0x7f9d75b43137 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x103137)
#2 0x7f9d75a682b1 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x282b1)
#3 0x7f9d75b1eb5a in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb5a)
#4 0x9cad7c in xmalloc xmalloc.c:147
#5 0x8f22e0 in do_arg cplus-dem.c:4330
#6 0x8f2d70 in demangle_args cplus-dem.c:4659
#7 0x8d9039 in demangle_nested_args cplus-dem.c:4713
#8 0x8d9039 in do_type cplus-dem.c:3719
#9 0x8f1d39 in do_arg cplus-dem.c:4332
#10 0x8f2d70 in demangle_args cplus-dem.c:4659
#11 0x8d9039 in demangle_nested_args cplus-dem.c:4713
#12 0x8d9039 in do_type cplus-dem.c:3719
#13 0x8f1d39 in do_arg cplus-dem.c:4332
#14 0x8f2d70 in demangle_args cplus-dem.c:4659
#15 0x8d9039 in demangle_nested_args cplus-dem.c:4713
#16 0x8d9039 in do_type cplus-dem.c:3719
#17 0x8f1d39 in do_arg cplus-dem.c:4332
#18 0x8f2d70 in demangle_args cplus-dem.c:4659
#19 0x8d9039 in demangle_nested_args cplus-dem.c:4713
#20 0x8d9039 in do_type cplus-dem.c:3719
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From: "david at pgmasters dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87316] gcc: internal compiler error: Killed (program cc1)
Date: Mon, 17 Sep 2018 13:21:00 -0000
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--- Comment #8 from David <david at pgmasters dot net> ---
Thanks, using -ftree-coalesce-vars cuts the time down by about 5x and allows
the unit tests to compile in available memory.
We may be able to cut down on the number of setjmps in the unit test macros,
but they are very convenient for testing.
>From gcc-bugs-return-615484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 13:28:12 2018
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Subject: [Bug tree-optimization/87328] [9 Regression] ICE in do_rpo_vn, at tree-ssa-sccvn.c:6566
Date: Mon, 17 Sep 2018 13:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Mon, 17 Sep 2018 13:28:00 -0000
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--- Comment #8 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #7)
> We cannot reasonably document that a feature does exactly the opposite of
> what it is intended to do, can we? You need to compile the entire software
> with the
> option, that's all.
Okay, so can you please document that -fstack-check probes one extra page ahead
by design, skipping one page adjacent to current stack pointer on the
assumption that callers are also compiled with -fstack-check and therefore must
have probed that page previously?
I think an indication that this option is intended for use with Ada also would
help.
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Subject: [Bug tree-optimization/87328] [9 Regression] ICE in do_rpo_vn, at tree-ssa-sccvn.c:6566
Date: Mon, 17 Sep 2018 13:31:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 17 13:28:04 2018
New Revision: 264369
URL: https://gcc.gnu.org/viewcvs?rev=264369&root=gcc&view=rev
Log:
2018-09-17 Richard Biener <rguenther@suse.de>
PR tree-optimization/87328
* tree-ssa-sccvn.c (process_bb): Remove assertion about not
visiting unexecutable backedges when not iterating.
(do_rpo_vn): Mark all edges not executable even when not
iterating.
* gcc.dg/torture/pr87328.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87328.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/87325] determine_base_object does not consider consider address space of base expr
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-17
CC| |amker at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|middle-end |tree-optimization
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44705
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44705&action=edit
patch
This "simple" one helps. It builds partition bases similar to the
-ftree-coalesce-vars case. Correctness needs to be verified still but I think
it errs on the safe side (computing too many dependences at most). In
particular it avoids computing dependences between things we'll later not try
coalescing anyways.
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Subject: [Bug c/87334] New: RFE: Add '__builtin_ms_va_list' support to ARM64
Date: Mon, 17 Sep 2018 14:22:00 -0000
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Bug ID: 87334
Summary: RFE: Add '__builtin_ms_va_list' support to ARM64
Product: gcc
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Wine 3.0.3 (and 3.8) introduced a change[1] to require the
'__builtin_ms_va_list' extension and when it is missing wine will compile with
clang. Clang 5.0 or higher is required for this extension and RHEL 7 ships
Clang 3. Wine no longer compiles on arm64 and RHEL 7.
RHEL 7 gcc: gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC)
Tested as missing on gcc 8.2.1 as well (Fedora Rawhide).
[1]
https://source.winehq.org/git/wine.git/commit/295359a17447d6ad487b6c652c3a98bbe17cee6e
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Subject: [Bug tree-optimization/87313] attribute malloc not used for alias analysis when it could be
Date: Mon, 17 Sep 2018 14:36:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
My reading of the attribute malloc documentation:
the pointer P returned by the function cannot alias any other pointer valid
when the function returns, and moreover no pointers to valid objects occur in
any storage addressed by P.
is that in
int **q = g (sizeof (int*));
*q = 0; // *q cannot be equal to *p prior to the assignment
the assignment to *q cannot clobber any object because *q doesn't store a
pointer to any storage.
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #10)
Yes, the warning should use the %G directive. It might be worth reviewing all
the middle-end warnings for this improvement. Unless we get rid of %G/%K first
and make GCC print the inlining stack unconditionally.
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--- Comment #9 from Rich Felker <bugdal at aerifal dot cx> ---
FWIW, glibc supports building with -fstack-check and seems to be attempting to
use it for this purpose too. See for example
https://sourceware.org/bugzilla/show_bug.cgi?id=21253
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87335] New: The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Mon, 17 Sep 2018 15:03:00 -0000
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Bug ID: 87335
Summary: The stack overflow in function cplus_demangle_type in
cp-demangle.c:2565 (c++filt -t)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 44706
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44706&action=edit
Stack_overflow_in_c++filt-t
Hi,
We have found a stack overflow in function cplus_demangle_type in
cp-demangle.c:2565 in c++filt of the latest binutils code base.
Here is the POC file. Please use the “c++filt -t < $POC †to reproduce the bug.
Thank you very much.
Command：“c++filt -t < $POC †(Please remember to use the option -t)
AddressSanitizer:DEADLYSIGNAL
=================================================================
==21814==ERROR: AddressSanitizer: stack-overflow on address 0x7ffcafaefbc0 (pc
0x0000008d3eb1 bp 0x7ffcafaf02d0 sp 0x7ffcafaefbc0 T0)
#0 0x8d3eb0 in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2367
#1 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#2 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#3 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#4 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#5 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#6 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#7 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#8 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#9 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
...
...
...
#246 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#247 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#248 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
#249 0x8d523c in cplus_demangle_type
/binutils-2.31/libiberty/./cp-demangle.c:2565:5
SUMMARY: AddressSanitizer: stack-overflow
/binutils-2.31/libiberty/./cp-demangle.c:2367 in cplus_demangle_type
==21814==ABORTING
Aborted
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87336] New: [8/9 regression] wrong output for pointer dummy assiocated to target actual argument
Date: Mon, 17 Sep 2018 15:48:00 -0000
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Bug ID: 87336
Summary: [8/9 regression] wrong output for pointer dummy
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Product: gcc
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The following code is expected to give:
a [before] = 2 3 4
arr = 2 3 4
bounds = 2 4
arr2= 200 200 200
a [after] = 200 200 200
(and did so with gfortran 5.4), but gives with gfortran 8 and 9:
a [before] = 2 3 4
arr = 2 2 2
bounds = 2 4
arr2= 200 200 200
a [after] = 200 3 4
The code is:
program main
implicit none
integer, target :: a( 2:4 )
a = [2,3,4]
print *, "a [before] = ", a
call show( a )
print *, "a [after] = ", a
contains
subroutine show( arr )
integer, pointer, intent(in) :: arr(:)
print *, "arr = ", arr
print *, "bounds = ", lbound(arr), ubound(arr)
arr(:) = 200
print *, "arr2= ", arr
end subroutine show
end program
Discussed on c.l.f. Sep. 16, 2018.
>From gcc-bugs-return-615494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 15:48:44 2018
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Subject: [Bug c/87334] RFE: Add '__builtin_ms_va_list' support to ARM64
Date: Mon, 17 Sep 2018 15:53:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-17
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed. (This should probably be reported to Red Hat's bugzilla too).
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Subject: [Bug c/87334] RFE: Add '__builtin_ms_va_list' support to ARM64
Date: Mon, 17 Sep 2018 16:31:00 -0000
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--- Comment #2 from Michael Cronenworth <mike at cchtml dot com> ---
Done: https://bugzilla.redhat.com/show_bug.cgi?id=1629910
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Mon, 17 Sep 2018 16:40:00 -0000
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--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Okay, so can you please document that -fstack-check probes one extra page
> ahead by design, skipping one page adjacent to current stack pointer on the
> assumption that callers are also compiled with -fstack-check and therefore
> must have probed that page previously?
Well, that's implicit, if you want to detect stack overflow, you need to
compile the entire software with stack checking, whatever the implementation
method.
> I think an indication that this option is intended for use with Ada also
> would help.
So what isn't clear in the current wording exactly?
`-fstack-check=' is designed for Ada's needs to detect infinite
recursion and stack overflows. `specific' is an excellent choice
when compiling Ada code. It is not generally sufficient to
protect against stack-clash attacks. To protect against those you
want `-fstack-clash-protection'.
>From gcc-bugs-return-615497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 16:40:22 2018
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
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--- Comment #11 from Rich Felker <bugdal at aerifal dot cx> ---
This problem starded because I read "not generally sufficient" in the sense
that it's helpful but not a complete fix for the kinds of issues that
-fstack-clash-protection mitigates. Based on my findings and followup
discussion, I think it's not even helpful, and I wonder why glibc is supporting
it for this use (separate topic of course, but it indicates there's a
misunderstanding of its intended and real capabilities, I think).
Regarding:
> Well, that's implicit, if you want to detect stack overflow, you need to compile the entire software with stack checking, whatever the implementation method.
I don't see that as implicit, and it's certainly not true for
-fstack-clash-protection. Callers that know they have large stacks but don't
use them can of course call into dubious code that might try to use ridiculous
amounts of stack as long as the latter is compiled with stack clash protection.
Likewise (assuming a guard page) a library where all functions have trivial
stack usage is safe to call from a caller that may have almost exhausted its
stack already, even if the library was not compiled with
-fstack-clash-protection.
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Mon, 17 Sep 2018 17:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87220
--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I don't see that as implicit, and it's certainly not true for
> -fstack-clash-protection.
We're going in circles... -fstack-clash-protection is not stack checking a la
Ada, it's stack protection against clash attacks and it indeed has different
requirements that stack checking.
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From: "alexey.burluka at northumbria dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87337] New: Internal compiler error on coarrays
Date: Mon, 17 Sep 2018 17:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87337
Bug ID: 87337
Summary: Internal compiler error on coarrays
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: alexey.burluka at northumbria dot ac.uk
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Created attachment 44707
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44707&action=edit
The fortran code producing the bug.
Attempt to compile a program with co-arrays produces:
internal compiler error: in gfc_conv_descriptor_token, at
fortran/trans-array.c:305
0x6a13b0 gfc_conv_descriptor_token(tree_node*)
../../srcdir/gcc/fortran/trans-array.c:303
0x6aa72d structure_alloc_comps
../../srcdir/gcc/fortran/trans-array.c:8726
0x6c6dfc gfc_trans_scalar_assign(gfc_se*, gfc_se*, gfc_typespec, bool, bool,
bool)
../../srcdir/gcc/fortran/trans-expr.c:8831
0x6d64ac gfc_trans_assignment_1
../../srcdir/gcc/fortran/trans-expr.c:10127
0x706a89 gfc_trans_allocate(gfc_code*)
../../srcdir/gcc/fortran/trans-stmt.c:6357
0x69bb87 trans_code
../../srcdir/gcc/fortran/trans.c:1976
0x6c0cf7 gfc_generate_function_code(gfc_namespace*)
../../srcdir/gcc/fortran/trans-decl.c:6335
0x655196 translate_all_program_units
../../srcdir/gcc/fortran/parse.c:6075
0x655196 gfc_parse_file()
../../srcdir/gcc/fortran/parse.c:6275
0x69848f gfc_be_parse_file
../../srcdir/gcc/fortran/f95-lang.c:204
The compilation/linking command is:
gfortran -g -ffree-form -Wall -fcheck=all -fcoarray=lib -o bl1 bl_bug.f95
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From: "jason.duerstock at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87338] New: gcc 8.2 fails to bootstrap on ia64
Date: Mon, 17 Sep 2018 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87338
Bug ID: 87338
Summary: gcc 8.2 fails to bootstrap on ia64
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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In GCC 8.2, the compiler fails to bootstrap due to many files differing between
stage2 and stage3. After removing the "STAGE2_CFLAGS += -gtoggle" line from
src/config/bootstrap-debug.mk, the compiler successfully bootstraps.
This is with the Debian gcc-8 packaging.
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
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--- Comment #13 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #12)
> We're going in circles... -fstack-clash-protection is not stack checking a
> la Ada, it's stack protection against clash attacks and it indeed has
> different requirements that stack checking.
I do not see from existing documentation what the differences are.
(In reply to Eric Botcazou from comment #10)
> Well, that's implicit, if you want to detect stack overflow, you need to
> compile the entire software with stack checking, whatever the implementation
> method.
To add to what Rich said, with -fstack-check callers need to probe one page
ahead even they don't use any stack themselves; this is not obvious and would
be nice to have explained in the documentation. I think a common expectation is
that only subroutines with nontrivial stack usage would have stack probing code
added to them.
int f(int (*p)(void))
{
return -p();
}
f:
subq $4136, %rsp
orq $0, (%rsp)
addq $4128, %rsp
call *%rdi
negl %eax
addq $8, %rsp
ret
> > I think an indication that this option is intended for use with Ada also
> > would help.
>
> So what isn't clear in the current wording exactly?
>
> `-fstack-check=' is designed for Ada's needs to detect infinite
> recursion and stack overflows. `specific' is an excellent choice
> when compiling Ada code. It is not generally sufficient to
> protect against stack-clash attacks. To protect against those you
> want `-fstack-clash-protection'.
To me, two things are unclear in the quote: whether the option is intended to
be used with other languages at all, and why specifically it "is not generally
sufficient to protect against stack-clash attacks".
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Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Mon, 17 Sep 2018 18:30:00 -0000
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--- Comment #14 from Andreas Schwab <schwab@linux-m68k.org> ---
(In reply to Rich Felker from comment #9)
> FWIW, glibc supports building with -fstack-check and seems to be attempting
> to use it for this purpose too. See for example
> https://sourceware.org/bugzilla/show_bug.cgi?id=21253
Glibc does not use -fstack-check, this is a gentoo local setting.
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Subject: [Bug c/87339] New: gcc.dg/warn-abs-1.c FAILs
Date: Mon, 17 Sep 2018 19:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87339
Bug ID: 87339
Summary: gcc.dg/warn-abs-1.c FAILs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: jamborm at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.*, aarch64-unknown-linux-gnu,
powerpc64-unknown-linux-gnu
The new gcc.dg/warn-abs-1.c test FAILs on Solaris/SPARC (32 and 64-bit) and,
according to gcc-testresults, on Linux/Aarch64 and Linux/PowerPC64:
+FAIL: gcc.dg/warn-abs-1.c (test for warnings, line 48)
I suspect this happens on targets without a distinct _Float128 type.
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Subject: [Bug bootstrap/87338] gcc 8.2 fails to bootstrap on ia64
Date: Mon, 17 Sep 2018 19:16:00 -0000
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--- Comment #1 from Jason Duerstock <jason.duerstock at gmail dot com> ---
Here is the full build log:
https://buildd.debian.org/status/fetch.php?pkg=gcc-8&arch=ia64&ver=8.2.0-6&stamp=1536516302&raw=0
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Subject: [Bug c/87339] gcc.dg/warn-abs-1.c FAILs
Date: Mon, 17 Sep 2018 19:23:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29842
Bug 29842 depends on bug 29931, which changed state.
Bug 29931 Summary: following argv[0] symlink in process_command breaks symlinked-together toolchain
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29931
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87336] [8/9 regression] wrong output for pointer dummy assiocated to target actual argument
Date: Mon, 17 Sep 2018 19:53:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
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CC| |anlauf at gmx dot de
--- Comment #1 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Jürgen Reuter from comment #0)
> Discussed on c.l.f. Sep. 16, 2018.
https://groups.google.com/forum/?hl=en#!topic/comp.lang.fortran/qhiZMe0snPQ
Replacing
integer, target :: a( 2:4 )
by
integer, pointer :: a(:)
allocate (a( 2:4 ))
"fixes" the issue.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87220] -fstack-check produces inefficient and wrong tests
Date: Mon, 17 Sep 2018 19:53:00 -0000
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--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> To me, two things are unclear in the quote: whether the option is intended
> to be used with other languages at all, and why specifically it "is not
> generally sufficient to protect against stack-clash attacks".
The answer is probably: not really and this doesn't belong to the user manual.
The current wording is Jeff's and I think that it's pretty good, but you are of
course free to post improvements to gcc-patches@
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/29931] following argv[0] symlink in process_command breaks symlinked-together toolchain
Date: Mon, 17 Sep 2018 20:34:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> (In reply to Eric Gallager from comment #6)
> > (In reply to Jorn Wolfgang Rennecke from comment #4)
> > > The bug is not fixed; the gcc.c patch has not been reviewed.
> >
> > What about now, after r169891? As mentioned in the comment after you:
> >
> > (In reply to simonb from comment #5)
> > > Author: simonb
> > > Date: Mon Feb 7 18:10:15 2011
> > > New Revision: 169891
> > >
> > > URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169891
> > > Log:
> > > Auto-detect suitable default behaviour for prefix canonicalization.
> > >
> > > Current gcc offers -no-canonical-prefixes to turn off realpath() for prefixes
> > > generated from the path used to address the gcc driver. This allows gcc to
> > > work in "symlink farm" installations, where every file in gcc is actually a
> > > symlink to its real contents. However, the flag has to be given explicitly.
> > > If not, the default is to use realpath() to create prefixes and the result
> > > is usually failure to find cc1[plus], f951, etc.
> > >
> > > This patch adds a check for a file as a way to auto-detect whether prefix
> > > canonicalization is appropriate or not. Detection can be overridden by
> > > using the -[no-]canonical-prefixes flags.
> > >
> > > The patch also completes the fix for PR/29931, adding code that covers the
> > > unadopted portion of this PR's attached patch.
> > >
> > > gcc/ChangeLog.google:
> > > 2011-02-07 Simon Baldwin <simonb@google.com>
> > >
> > > PR driver/29931
> > > * doc/invoke.texi: Adjust -[no-]canonical-prefixes documentation.
> > > * gcc.c (display_help): Help text for -[no-]canonical-prefixes.
> > > (driver_handle_option): Ignore OPT_canonical_prefixes.
> > > (process_command): Handle OPT_[no_]canonical_prefixes, auto-detect
> > > suitable default prefix canonicalization mode.
> > > * common.opt (canonical-prefixes): New flag.
> > >
> > > Google ref: 40029, 38719
> > >
> > >
> > > Modified:
> > > branches/google/integration/gcc/ChangeLog.google-integration
> > > branches/google/integration/gcc/common.opt
> > > branches/google/integration/gcc/doc/invoke.texi
> > > branches/google/integration/gcc/gcc.c
>
> WAITING on a reply
Assuming this was FIXED
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Subject: [Bug c++/86881] tree check fail with flag Wshadow-compatible-local
Date: Mon, 17 Sep 2018 20:36:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Created attachment 44708
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44708&action=edit
A similar testcase
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Subject: [Bug c++/86881] tree check fail with flag Wshadow-compatible-local
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-17
Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
No lambda's required. Just the outer one must have some kind of class type:
struct Proxy { };
void Two ()
{
auto my = Proxy ();
{
auto my = int (); // boom
}
}
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From: "poppeter1982 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87340] New: Stack overflow problem for c++filt
Date: Mon, 17 Sep 2018 21:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87340
Bug ID: 87340
Summary: Stack overflow problem for c++filt
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: poppeter1982 at gmail dot com
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Created attachment 44709
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44709&action=edit
PoCs to demonstrate segfaults of c++filt
Hi There
Our fuzzer caught stack overflows in c++filt of the latest binutils code base,
those inputs will cause the segment faults and I have confirmed them with
address sanitizer too. Please use the “c++filt < input†to reproduce the bug.
If you have any questions, please let me know.
The ASAN dumps the stack trace as follows:
==25314==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc1fb15f58 (pc
0x0000004a5672 bp 0x7ffc1fb167a0 sp 0x7ffc1fb15f40 T0)
#0 0x4a5671 in malloc
/home/peter668/AFL_KLEE_FUZZ/toolchain/LLVM/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:39
#1 0x5845d4 in xmalloc
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./xmalloc.c:147:12
#2 0x56912c in string_need
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4906:21
#3 0x56a23a in string_append
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4961:3
#4 0x56a23a in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4578
#5 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#6 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#7 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#8 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#9 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#10 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#11 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#12 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#13 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#14 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#15 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#16 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#17 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#18 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#19 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#20 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#21 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#22 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#23 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#24 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#25 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#26 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#27 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#28 0x56a417 in demangle_args
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#233 0x563e74 in demangle_nested_args
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#241 0x563e74 in demangle_nested_args
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#248 0x56a417 in demangle_args
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#249 0x563e74 in demangle_nested_args
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#250 0x563e74 in do_type
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#251 0x56a97b in do_arg
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#252 0x56a417 in demangle_args
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#253 0x563e74 in demangle_nested_args
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#254 0x563e74 in do_type
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#255 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#256 0x56a417 in demangle_args
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#257 0x563e74 in demangle_nested_args
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#260 0x56a417 in demangle_args
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#261 0x563e74 in demangle_nested_args
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#262 0x563e74 in do_type
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#263 0x56a97b in do_arg
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#264 0x56a417 in demangle_args
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#265 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#266 0x563e74 in do_type
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#267 0x56a97b in do_arg
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#269 0x563e74 in demangle_nested_args
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#270 0x563e74 in do_type
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#271 0x56a97b in do_arg
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#272 0x56a417 in demangle_args
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#273 0x563e74 in demangle_nested_args
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#274 0x563e74 in do_type
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#275 0x56a97b in do_arg
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#276 0x56a417 in demangle_args
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#277 0x563e74 in demangle_nested_args
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#278 0x563e74 in do_type
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#280 0x56a417 in demangle_args
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#281 0x563e74 in demangle_nested_args
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#282 0x563e74 in do_type
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#283 0x56a97b in do_arg
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#284 0x56a417 in demangle_args
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#285 0x563e74 in demangle_nested_args
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#286 0x563e74 in do_type
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#287 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#288 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#289 0x563e74 in demangle_nested_args
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#293 0x563e74 in demangle_nested_args
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#297 0x563e74 in demangle_nested_args
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#301 0x563e74 in demangle_nested_args
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#317 0x563e74 in demangle_nested_args
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/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#321 0x563e74 in demangle_nested_args
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#322 0x563e74 in do_type
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#323 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#324 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#325 0x563e74 in demangle_nested_args
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#326 0x563e74 in do_type
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#327 0x56a97b in do_arg
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#328 0x56a417 in demangle_args
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#329 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#330 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#331 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
#332 0x56a417 in demangle_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4659:9
#333 0x563e74 in demangle_nested_args
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4713:12
#334 0x563e74 in do_type
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:3719
#335 0x56a97b in do_arg
/home/peter668/lipeng/TMP/binutils-gdb/libiberty/./cplus-dem.c:4332:8
SUMMARY: AddressSanitizer: stack-overflow
/home/peter668/AFL_KLEE_FUZZ/toolchain/LLVM/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:39
malloc
==25314==ABORTING
Thanks
Peng
>From gcc-bugs-return-615513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 21:46:47 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/62194] Add deadfield attribute to ignore initializers for a structure field
Date: Mon, 17 Sep 2018 21:59:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm not sure that changing the meaning of fundamental language constructs like
declarations and writes to them in such a profound way would be viewed as a
good idea. One way to find out is to email the gcc mailing list. An even
better way is to prototype it and post an RFC patch to gcc-patches.
>From gcc-bugs-return-615514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 21:59:52 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87341] New: gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Mon, 17 Sep 2018 22:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87341
Bug ID: 87341
Summary: gfortran can not link executables: _edata: invalid
version 21 (max 4)
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Reporter: mi+gcc at aldan dot algebra.com
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The entire gcc-8.2 configured with the following:
./configure --enable-cxx --enable-alloca --prefix=/prod/pfe/local
--with-gmp=/prod/pfe/local --with-mpfr=/prod/pfe/local
--with-mpc=/prod/pfe/local --enable-valgrind-tests --with-system-libz
--with-gcc-major-version-only --enable-lto --enable-gold --enable-ld
--enable-libssp --with-pkgversion=Misha@Local --with-as=/prod/pfe/local/bin/as
--enable-languages=c,c++,fortran,lto,jit,objc --enable-vtable-verify
--enable-gnu-indirect-function --enable-initfini-array --enable-host-shared
The resulting C++ and C compilers both seem to work well.
Gfortran also creates object files with ease, however linking the executables
(and the shared libraries) fails thus:
gfortran -o xscblat1 c_sblat1.o c_sblas1.o ../lib/cblas_LINUX.a
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/ld:
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.so:
_edata: invalid version 21 (max 4)
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/ld:
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.so:
error adding symbols: bad value
>From gcc-bugs-return-615515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 22:25:32 2018
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Mon, 17 Sep 2018 22:55:00 -0000
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--- Comment #1 from mi+gcc at aldan dot algebra.com ---
Invoking gfortran with -v I get the following details:
Driving: gfortran -v -o xscblat1 c_sblat1.o c_sblas1.o ../lib/cblas_LINUX.a -l
gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --enable-cxx --enable-alloca
--prefix=/prod/pfe/local --with-gmp=/prod/pfe/local --with-mpfr=/prod/pfe/local
--with-mpc=/prod/pfe/local --enable-valgrind-tests --with-system-libz
--with-gcc-major-version-only --enable-lto --enable-gold --enable-ld
--enable-libssp --with-pkgversion=Misha@Local --with-as=/prod/pfe/local/bin/as
--enable-languages=c,c++,fortran,lto,jit,objc --enable-vtable-verify
--enable-gnu-indirect-function --enable-initfini-array --enable-host-shared
Thread model: posix
gcc version 8.2.0 (Misha@Local)
Reading specs from
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-v' '-o' 'xscblat1' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
COMPILER_PATH=/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/:/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/:/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/
LIBRARY_PATH=/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/lib/:/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'xscblat1' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/collect2 -plugin
/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/liblto_plugin.so
-plugin-opt=/prod/pfe/local/libexec/gcc/x86_64-pc-linux-gnu/8/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccKgaJkR.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lquadmath
-plugin-opt=-pass-through=-lm -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o
xscblat1 /usr/lib/../lib64/crt1.o /usr/lib/../lib64/crti.o
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/crtbegin.o
-L/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8
-L/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64
-L/lib/../lib64 -L/usr/lib/../lib64
-L/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/lib
-L/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../.. c_sblat1.o c_sblas1.o
../lib/cblas_LINUX.a -lgfortran -lm -lgcc_s -lgcc -lquadmath -lm -lgcc_s -lgcc
-lc -lgcc_s -lgcc /prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/crtend.o
/usr/lib/../lib64/crtn.o
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/ld:
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.so:
_edata: invalid version 21 (max 4)
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/ld:
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.so:
error adding symbols: bad value
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-615516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 22:55:38 2018
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From: "mi+gcc at aldan dot algebra.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Mon, 17 Sep 2018 23:11:00 -0000
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--- Comment #2 from mi+gcc at aldan dot algebra.com ---
BTW, I'd dearly love if not a fix, then a work-around ASAP. Is there some kind
of command-line option I can add to gfortran's command-line? Thanks!
>From gcc-bugs-return-615517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 17 23:11:07 2018
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 00:24:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a binutils bug, in gold.
--enable-gold
Please report this to binutils instead.
>From gcc-bugs-return-615518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 00:24:45 2018
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 02:18:00 -0000
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--- Comment #4 from mi+gcc at aldan dot algebra.com ---
(In reply to Andrew Pinski from comment #3)
> This is a binutils bug, in gold.
> --enable-gold
>
> Please report this to binutils instead.
Is there a work-around, perhaps? Some additional command-line option I could
give to gfortran now to avoid rebuilding/reinstalling the entire gcc with
--disable-gold? (I already tried -fuse-ld=bfd to no avail.)
Also, this may indeed be a binutils bug, but all I did was run configure with
the advertised options -- and got an unusable Fortran compiler for my
troubles...
If --enable-languages=fortran is incompatible with --enable-gold, configure
should've errored (or warned) right there, should it not have?
If this is a known problem, then either this bug should be used to track it --
or the resolution should be DUPLICATE, with reference to the earlier bug
describing the same...
Thank you for the prompt response.
>From gcc-bugs-return-615519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 02:18:33 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87342] New: [9 Regression] ICE: verify_ssa failed (error: definition in block 10 does not dominate use in block 8)
Date: Tue, 18 Sep 2018 02:39:00 -0000
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Bug ID: 87342
Summary: [9 Regression] ICE: verify_ssa failed (error:
definition in block 10 does not dominate use in block
8)
Product: gcc
Version: 9.0
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gcc-9.0.0-alpha20180916 snapshot (r264351) ICEs when compiling the following
snippet w/ -O1 or -Og:
int ix;
void
o6 (int rh)
{
if (rh == 0)
{
ix = 0;
while (ix < 1)
{
}
for (;;)
if (ix == 0)
while (rh < 1)
{
if (rh == 0)
{
__builtin_unreachable ();
kp:
if (ix == 0)
{
hk:
ix = 0;
}
}
while (rh < 1)
if (ix == 0)
goto kp;
while (rh < 1)
{
}
}
else
goto kp;
}
goto hk;
}
% gcc-9.0.0-alpha20180916 -O1 -c ifjkuamu.c
ifjkuamu.c: In function 'o6':
ifjkuamu.c:42:1: error: definition in block 10 does not dominate use in block 8
42 | }
| ^
for SSA_NAME: ix.3_4 in statement:
if (ix.3_4 == 0)
during GIMPLE pass: fre
ifjkuamu.c:42:1: internal compiler error: verify_ssa failed
0xec982e verify_ssa(bool, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-ssa.c:1188
0xbe75ad execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1950
0xbe839e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1997
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Subject: [Bug target/87288] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Tue, 18 Sep 2018 03:03:00 -0000
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--- Comment #4 from bin cheng <amker at gcc dot gnu.org> ---
In dump for IVOPTs, there is niter analyzed like:
Applying pattern match.pd:1651, generic-match.c:16009
Analyzing # of iterations of loop 1
exit condition [1, + , 1](no_overflow) < bnd.8_41
bounds on difference of bases: 0 ... 2147483646
Applying pattern match.pd:1111, generic-match.c:115
Applying pattern match.pd:1167, generic-match.c:16905
Applying pattern match.pd:108, generic-match.c:50
result:
# of iterations bnd.8_41 + 4294967295, bounded by 2147483646
number of iterations bnd.8_41 + 4294967295
for below GIMPLE:
<bb 5> [local count: 105119324]:
niters.6_33 = (unsigned int) n_14;
ni_gap.7_40 = niters.6_33 + 4294967295;
bnd.8_41 = ni_gap.7_40 >> 1;
<bb 4> [local count: 567644349]:
# vectp.11_44 = PHI <vectp.11_45(6), _10(5)>
# vectp_jacobianTransposeds.15_51 = PHI <vectp_jacobianTransposeds.15_52(6),
&jacobianTransposeds(5)>
# ivtmp_54 = PHI <ivtmp_55(6), 0(5)>
vect__5.13_46 = MEM[(double *)vectp.11_44];
vectp.11_47 = vectp.11_44 + 16;
vect__5.14_48 = MEM[(double *)vectp.11_47];
vect_perm_even_49 = VEC_PERM_EXPR <vect__5.13_46, vect__5.14_48, { 0, 2 }>;
MEM[(double &)vectp_jacobianTransposeds.15_51] = vect_perm_even_49;
vectp.11_45 = vectp.11_47 + 16;
vectp_jacobianTransposeds.15_52 = vectp_jacobianTransposeds.15_51 + 16;
ivtmp_55 = ivtmp_54 + 1;
if (ivtmp_55 >= bnd.8_41)
goto <bb 12>; [16.67%]
else
goto <bb 6>; [83.33%]
So # of iterations is wrong, it should be:
bnd.8_41 == 0 ? 0 : bnd.8_41 + 4294967295
This is because bounds is wrongly computed by below code:
// iv1->base = bnd.8_4;
// iv0->base =0;
bound_difference (loop, iv1->base, iv0->base, &bnds);
because of wrong range information for bnd.8_4 as in dump for slp1:
;; basic block 5, loop depth 0, count 105119324 (estimated locally), maybe
hot
;; prev block 3, next block 4, flags: (NEW, VISITED)
;; pred: 2 [89.0% (guessed)] count:105119324 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
niters.6_33 = (unsigned int) n_14;
ni_gap.7_40 = niters.6_33 + 4294967295;
# RANGE [1, 2147483647] NONZERO 2147483647
bnd.8_41 = ni_gap.7_40 >> 1;
Seems to me bnd.8_41 can take value ZERO.
Is this related to changes in VRP? Thanks.
>From gcc-bugs-return-615521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 03:03:47 2018
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at gcc dot gnu.org,
| |manu at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing relevant people
>From gcc-bugs-return-615522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 03:07:02 2018
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
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--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #11)
> (In reply to Jonathan Wakely from comment #10)
> > Sadly I have no better suggestion than -Wno-error=maybe-uninitialized
>
> Move -Wmaybe-uninitialized from -Wall to -Wextra?
That sounds like a decent suggestion
>From gcc-bugs-return-615523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 04:47:51 2018
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Subject: [Bug target/87330] ICE in scan_rtx_reg, at regrename.c:1097
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--- Comment #2 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
Thanks, I'll take a look. Kyrill can you please assign the bug to me? I don't
seem to have to chops to edit the bz.
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Ville Voutilainen from comment #2)
> Also present in 4.9 trunk, and I recently got a user complaint about this
> bug. How can I upvote? :)
If Bug 86315 is fixed, adding yourself on cc will become kinda like upvoting,
so since you've already added yourself on cc, you've already upvoted.
>From gcc-bugs-return-615525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 05:54:54 2018
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Subject: [Bug tree-optimization/87325] determine_base_object does not consider consider address space of base expr
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--- Comment #2 from bin cheng <amker at gcc dot gnu.org> ---
Seems alloc_iv doesn't infer base object correctly:
/* Lower address expression in base except ones with DECL_P as operand.
By doing this:
1) More accurate cost can be computed for address expressions;
2) Duplicate candidates won't be created for bases in different
forms, like &a[0] and &a. */
STRIP_NOPS (expr);
if ((TREE_CODE (expr) == ADDR_EXPR && !DECL_P (TREE_OPERAND (expr, 0)))
|| contain_complex_addr_expr (expr))
{
aff_tree comb;
tree_to_aff_combination (expr, TREE_TYPE (expr), &comb);
base = fold_convert (TREE_TYPE (base), aff_combination_to_tree (&comb));
}
iv->base = base;
iv->base_object = determine_base_object (base);
Given:
(gdb) call debug_generic_expr(expr)
&ts[1].y
in which "ts" is a VAR_DECL in specific address space:
(gdb) call debug_generic_expr(*addr_p)
ts
(gdb) p (*addr_p)->base.code
$8 = VAR_DECL
(gdb) p (*addr_p)->typed.type->base.u.bits.address_space
$10 = 7
Question is, should be build appropriate pointer type for "ts[1].y", for now,
base = build_fold_addr_expr (base);
returns:
(gdb) call debug_generic_expr(base)
&ts[1].y
(gdb) call debug_generic_expr(base->typed.type)
float *
Thanks
>From gcc-bugs-return-615526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 06:03:31 2018
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Subject: [Bug fortran/87336] [8/9 regression] wrong output for pointer dummy assiocated to target actual argument
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-18
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Mea culpa, mea maxima culpa - I had better take it therefore.
A quick fix of this bug that causes a few regressions:
*************** gfc_conv_procedure_call (gfc_se * se, gf
*** 5573,5578 ****
--- 5574,5590 ----
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (&se->pre, tmp);
}
+
+ if (fsym && fsym->attr.pointer
+ && fsym->ts.type != BT_CLASS)
+ {
+ tree desc = build_fold_indirect_ref_loc (input_location,
+ parmse.expr);
+ tmp = gfc_get_element_type (TREE_TYPE (desc));
+ tmp = fold_convert (gfc_array_index_type,
+ size_in_bytes (tmp));
+ gfc_conv_descriptor_span_set (&parmse.pre, desc, tmp);
+ }
}
}
The real problem lies in gfc_conv_expr_descriptor. One of the paths through it
is clearly not setting the 'span' field that is needed for pointer array
indexing.
I'm onto it
Paul
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Subject: [Bug other/87343] New: Incomplete documentation for built-in type traits
Date: Tue, 18 Sep 2018 06:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87343
Bug ID: 87343
Summary: Incomplete documentation for built-in type traits
Product: gcc
Version: 9.0
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The manual page https://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html seems to be
missing descriptions of several built-in type traits in current (trunk) use for
implementing the C++ <type_traits> header.
The missing entries seem to include __is_final, __is_trivially_copyable,
__is_assignable, __is_trivially_constructible, __is_trivially_assignable,
__is_aggregate, and __is_constructible.
Also, while the __is_same trait is documented in section 7.10 (Concepts), its
description seems perhaps to belong better among the other built-ins in 7.9
(Type Traits). I believe that this trait's placement in 7.10 is simply a
historical artifact, and that no harm would accrue from relocating it to 7.9.
(Bug 48748 is similar in nature, but has long since been addressed.)
>From gcc-bugs-return-615528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 06:47:36 2018
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Subject: [Bug c/87344] New: archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative
Date: Tue, 18 Sep 2018 06:49:00 -0000
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Bug ID: 87344
Summary: archival/libarchive/decompress_gunzip.c:1139:2: error:
size of unnamed array is negative
Product: gcc
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Created attachment 44710
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44710&action=edit
compile.sh
# ./compile.sh
archival/libarchive/decompress_gunzip.c:1:0: warning: this target machine does
not have delayed branches [enabled by default]
archival/libarchive/decompress_gunzip.c:1:0: warning: -fassociative-math
disabled; other options take precedence [enabled by default]
archival/libarchive/decompress_gunzip.c: In function ‘check_header_gzip’:
archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is
negative
The orignal code is:
1126 static int check_header_gzip(STATE_PARAM transformer_state_t *xstate)
1127 {
1128 union {
1129 unsigned char raw[8];
1130 struct {
1131 uint8_t gz_method;
1132 uint8_t flags;
1133 uint32_t mtime;
1134 uint8_t xtra_flags_UNUSED;
1135 uint8_t os_flags_UNUSED;
1136 } PACKED formatted;
1137 } header;
1138
1139 BUILD_BUG_ON(sizeof(header) != 8);
The preprocessed code is:
11347 static int check_header_gzip(state_t *state, transformer_state_t *xstate)
11348 {
11349 union {
11350 unsigned char raw[8];
11351 struct {
11352 uint8_t gz_method;
11353 uint8_t flags;
11354 uint32_t mtime;
11355 uint8_t xtra_flags_UNUSED;
11356 uint8_t os_flags_UNUSED;
11357 } __attribute__ ((__packed__)) formatted;
11358 } header;
11359
11360 ((void)sizeof(char[1 - 2*!!(sizeof(header) != 8)]));
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Subject: [Bug c/87344] archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative
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--- Comment #1 from Wen Yang <yellowriver2010 at hotmail dot com> ---
Created attachment 44711
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decompress_gunzip.i
>From gcc-bugs-return-615530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 06:51:19 2018
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Subject: [Bug c/87344] archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative
Date: Tue, 18 Sep 2018 06:56:00 -0000
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--- Comment #2 from Wen Yang <yellowriver2010 at hotmail dot com> ---
Created attachment 44712
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44712&action=edit
decompress_gunzip.i
>From gcc-bugs-return-615531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 06:56:50 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Tue, 18 Sep 2018 06:59:00 -0000
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--- Comment #6 from janus at gcc dot gnu.org ---
(In reply to janus from comment #4)
> (In reply to Jerry DeLisle from comment #3)
> > Created attachment 44700 [details]
> > Revised dtio_1.f90
> >
> > Will this attached version suffice?
>
> Looks good at first sight. Will try ifort 19 on it soon, in order to see if
> it runs as expected.
Yes, I can confirm that with ifort 19 this version shows the same runtime
behavior as with gfortran. Feel free to commit ...
>From gcc-bugs-return-615532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 06:59:09 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
Date: Tue, 18 Sep 2018 07:02:00 -0000
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--- Comment #7 from janus at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #5)
> > Do you think it's feasible to add some sort of diagnostics for this problem?
> > Or should we rather follow ifort's approach and enforce this restriction
> > without diagnostic messages? That would probably require a wrapper around
> > the DTIO procedures that would enforce the restrictions, right?
>
> My interpretation is that this is a requirement on the user.
I agree.
>From gcc-bugs-return-615533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:02:31 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87325] determine_base_object does not consider consider address space of base expr
Date: Tue, 18 Sep 2018 07:14:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 18 Sep 2018, amker at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87325
>
> --- Comment #2 from bin cheng <amker at gcc dot gnu.org> ---
> Seems alloc_iv doesn't infer base object correctly:
> /* Lower address expression in base except ones with DECL_P as operand.
> By doing this:
> 1) More accurate cost can be computed for address expressions;
> 2) Duplicate candidates won't be created for bases in different
> forms, like &a[0] and &a. */
> STRIP_NOPS (expr);
> if ((TREE_CODE (expr) == ADDR_EXPR && !DECL_P (TREE_OPERAND (expr, 0)))
> || contain_complex_addr_expr (expr))
> {
> aff_tree comb;
> tree_to_aff_combination (expr, TREE_TYPE (expr), &comb);
> base = fold_convert (TREE_TYPE (base), aff_combination_to_tree (&comb));
> }
>
> iv->base = base;
> iv->base_object = determine_base_object (base);
>
> Given:
> (gdb) call debug_generic_expr(expr)
> &ts[1].y
>
> in which "ts" is a VAR_DECL in specific address space:
> (gdb) call debug_generic_expr(*addr_p)
> ts
> (gdb) p (*addr_p)->base.code
> $8 = VAR_DECL
> (gdb) p (*addr_p)->typed.type->base.u.bits.address_space
> $10 = 7
>
> Question is, should be build appropriate pointer type for "ts[1].y", for now,
> base = build_fold_addr_expr (base);
> returns:
> (gdb) call debug_generic_expr(base)
> &ts[1].y
> (gdb) call debug_generic_expr(base->typed.type)
> float *
I think build_fold_addr_expr handles things correctly since it uses
built_pointer_type which should handle address-spaces correctly.
The question is probably whether ts[1].y has the proper address-space
qualified type (which IIRC it doesn't ...). So we'd need sth
like ref_alias_ptr_type - a ref_addr_space () we can use to extract
the address-space from an object and transfer that properly in
build_fold_addr_expr (and elsewhere we run into this issue). Whereever
RTL expansion takes the address-space from is probably the code to
mimic in said new API.
>From gcc-bugs-return-615534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:14:34 2018
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From: "jingtian at loongson dot cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87345] New: The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:18:00 -0000
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Bug ID: 87345
Summary: The compiler of the old version (for example: 4.9.3
version or 6.3.0 version) can stop the infinite
cross-border loop, but the new version does not work.
Product: gcc
Version: 8.2.0
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Created attachment 44713
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this is *.i file
Hello, in fact, I don't know if this is a bug, or I don't know if the old
version of GCC can be tolerated, but the new version of GCC has the most
stringent requirements to have such a phenomenon. Since I started to forget to
forget to provide the return value in the void* type of function, but I am
compiling on a lower version of GCC, I tried versions 4.9 and 6.3. There was no
problem at this time, but when I used the newer versions 8.1 and 8.2, it
prompted me to have a Segmentation fault (core dumped).
If I normalize my writing, such as changing void* to void, or adding a return
NULL to the void* type of function, this problem can be solved.
Below is my gcc version information（This is how I made a docker on the mips
machine with a debain system installed.Similarly, I will use gcc 8.1.0 on
fedora28 to have the same situation.）
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/mips64el-linux-gnuabi64/8/lto-wrapper
Target: mips64el-linux-gnuabi64
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=mips64el-linux-gnuabi64- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libsanitizer --disable-libquadmath --disable-libquadmath-support
--enable-plugin --enable-default-pie --with-system-zlib --disable-libphobos
--enable-objc-gc=auto --enable-multiarch --disable-werror --enable-multilib
--with-mips-plt --with-arch-64=mips64r2 --with-madd4=no --enable-targets=all
--with-arch-32=mips32r2 --with-fp-32=xx --enable-checking=release
--build=mips64el-linux-gnuabi64 --host=mips64el-linux-gnuabi64
--target=mips64el-linux-gnuabi64
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-4)
The GCC compile command I am using is :
gcc -g -O3 -o demotest demotest.cpp
（The same use of O1 O2 O3 will have problems, but do not choose the
optimization option, only the -o option, there will be no such situation）
Here is my code：
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "ctype.h"
void *strlwr(char *str)
{
for(; *str!='\0'; str++)
{
*str = tolower(*str);
}
//return NULL;
}
int main()
{
char res[20];
char a[20]="ABCDEFGhijklmn";
memset(res,'\0',20*sizeof(char));
strcpy(res,a);
printf("%s\n",res);
strlwr(res);
printf("%s\n",res);
return 0;
}
This is the information that was reported during execution：
ABCDEFGhijklmn
Segmentation fault (core dumped)
I am seeing the instructions on the website, saying that this infinite loop
problem can be avoided by adding the -fno-aggressive-loop-optimizations option,
but I added this to the compile option, but it still doesn't work.
I just started to be a developer. My English is not particularly good. I have
seen the needs of the website for a long time. I don't know if I qualified to
submit this small question. If there is no good place to do it, I I am very
sorry, increasing your workload.
>From gcc-bugs-return-615535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:18:11 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87345] The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87345
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>void *strlwr(char *str)
> {
...
> //return NULL;
> }
This is the issue and not anything else.
In C++ (unlike C), falling through to return where there is a return type is
undefined code at that point.
(In C, it is undefined if the return value was used).
>From gcc-bugs-return-615536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:18:35 2018
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From: "jingtian at loongson dot cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87346] New: The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87346
Bug ID: 87346
Summary: The compiler of the old version (for example: 4.9.3
version or 6.3.0 version) can stop the infinite
cross-border loop, but the new version does not work.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jingtian at loongson dot cn
Target Milestone: ---
Hello, in fact, I don't know if this is a bug, or I don't know if the old
version of GCC can be tolerated, but the new version of GCC has the most
stringent requirements to have such a phenomenon. Since I started to forget to
forget to provide the return value in the void* type of function, but I am
compiling on a lower version of GCC, I tried versions 4.9 and 6.3. There was no
problem at this time, but when I used the newer versions 8.1 and 8.2, it
prompted me to have a Segmentation fault (core dumped).
If I normalize my writing, such as changing void* to void, or adding a return
NULL to the void* type of function, this problem can be solved.
Below is my gcc version information（This is how I made a docker on the mips
machine with a debain system installed.Similarly, I will use gcc 8.1.0 on
fedora28 to have the same situation.）
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/mips64el-linux-gnuabi64/8/lto-wrapper
Target: mips64el-linux-gnuabi64
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=mips64el-linux-gnuabi64- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libsanitizer --disable-libquadmath --disable-libquadmath-support
--enable-plugin --enable-default-pie --with-system-zlib --disable-libphobos
--enable-objc-gc=auto --enable-multiarch --disable-werror --enable-multilib
--with-mips-plt --with-arch-64=mips64r2 --with-madd4=no --enable-targets=all
--with-arch-32=mips32r2 --with-fp-32=xx --enable-checking=release
--build=mips64el-linux-gnuabi64 --host=mips64el-linux-gnuabi64
--target=mips64el-linux-gnuabi64
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-4)
The GCC compile command I am using is :
gcc -g -O3 -o demotest demotest.cpp
（The same use of O1 O2 O3 will have problems, but do not choose the
optimization option, only the -o option, there will be no such situation）
Here is my code：
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "ctype.h"
void *strlwr(char *str)
{
for(; *str!='\0'; str++)
{
*str = tolower(*str);
}
//return NULL;
}
int main()
{
char res[20];
char a[20]="ABCDEFGhijklmn";
memset(res,'\0',20*sizeof(char));
strcpy(res,a);
printf("%s\n",res);
strlwr(res);
printf("%s\n",res);
return 0;
}
This is the information that was reported during execution：
ABCDEFGhijklmn
Segmentation fault (core dumped)
I am seeing the instructions on the website, saying that this infinite loop
problem can be avoided by adding the -fno-aggressive-loop-optimizations option,
but I added this to the compile option, but it still doesn't work.
I just started to be a developer. My English is not particularly good. I have
seen the needs of the website for a long time. I don't know if I qualified to
submit this small question. If there is no good place to do it, I I am very
sorry, increasing your workload.
>From gcc-bugs-return-615537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:18:46 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87345] The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:22:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |c++
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>gcc -g -O3 -o demotest demotest.cpp
That is a C++ program rather than a C program.
>From gcc-bugs-return-615538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:22:01 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87288] [8/9 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Tue, 18 Sep 2018 07:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.3.1
Target Milestone|--- |8.3
Summary|Segfault after const_cast |[8/9 Regression] Segfault
|with "-O2 |after const_cast with "-O2
|-ftree-loop-vectorize" but |-ftree-loop-vectorize" but
|_without_ "-mavx" |_without_ "-mavx"
Known to fail| |8.2.1
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-tree-bit-ccp happens to fix the bug but it looks latent (same bogus
value-range). Value-ranges appear from DOM and the [1, ...] one first appears
with the
vect pass:
t.C.160t.ifcvt: # RANGE ~[2147483648, 18446744071562067967]
t.C.160t.ifcvt: # RANGE [0, 18446744073709551600]
t.C.160t.ifcvt: # RANGE [-2147483647, 2147483647]
t.C.161t.vect: # RANGE [1, 2147483647] NONZERO 2147483647
t.C.161t.vect: # RANGE ~[2147483648, 18446744071562067967]
t.C.161t.vect: # RANGE [0, 18446744073709551600]
t.C.161t.vect: # RANGE [-2147483647, 2147483647]
t.C.161t.vect: # RANGE ~[2147483648, 18446744071562067967]
t.C.161t.vect: # RANGE [0, 18446744073709551600]
t.C.161t.vect: # RANGE [-2147483647, 2147483647]
it's set here:
if (!is_gimple_val (niters_vector))
{
var = create_tmp_var (type, "bnd");
gimple_seq stmts = NULL;
niters_vector = force_gimple_operand (niters_vector, &stmts, true, var);
gsi_insert_seq_on_edge_immediate (pe, stmts);
/* Peeling algorithm guarantees that vector loop bound is at least ONE,
we set range information to make niters analyzer's life easier. */
if (stmts != NULL && log_vf)
set_range_info (niters_vector, VR_RANGE,
wi::to_wide (build_int_cst (type, 1)),
wi::to_wide (fold_build2 (RSHIFT_EXPR, type,
TYPE_MAX_VALUE (type),
log_vf)));
and the loop is
<bb 5> [local count: 105119325]:
niters.0_25 = (unsigned int) n_15;
ni_gap.1_36 = niters.0_25 + 4294967295;
# RANGE [1, 2147483647] NONZERO 2147483647
bnd.2_37 = ni_gap.1_36 >> 1;
<bb 4> [local count: 567644349]:
# ivtmp_50 = PHI <ivtmp_51(6), 0(5)>
ivtmp_51 = ivtmp_50 + 1;
if (ivtmp_51 >= bnd.2_37)
goto <bb 12>; [16.67%]
else
goto <bb 6>; [83.33%]
<bb 6> [local count: 473036958]:
goto <bb 4>; [100.00%]
which looks good according to the comment. So the number of iterations
_is_ bnd.2_37 - 1 (that number may be zero).
>From gcc-bugs-return-615539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:30:03 2018
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Subject: [Bug fortran/87336] [8/9 regression] wrong output for pointer dummy assiocated to target actual argument
Date: Tue, 18 Sep 2018 07:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Target Milestone|--- |8.3
>From gcc-bugs-return-615542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:32:25 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87345] The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87345
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87346 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:32:25 2018
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Subject: [Bug c/87346] The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87346
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Again this has nothing to do with the loop but rather the return value.
If you want to detect this at runtime, you can use -fsantize=undefined .
*** This bug has been marked as a duplicate of bug 87345 ***
>From gcc-bugs-return-615540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:31:52 2018
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Subject: [Bug bootstrap/87338] gcc 8.2 fails to bootstrap on ia64
Date: Tue, 18 Sep 2018 07:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |build
Target| |ia64-*-*
CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does it work with GCC 7.3.0?
>From gcc-bugs-return-615543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:32:48 2018
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Subject: [Bug tree-optimization/87342] [9 Regression] ICE: verify_ssa failed (error: definition in block 10 does not dominate use in block 8)
Date: Tue, 18 Sep 2018 07:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-615545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:34:17 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87347] New: ICE in warn_for_abs at gcc/c/c-parser.c:9226 since r264368
Date: Tue, 18 Sep 2018 07:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87347
Bug ID: 87347
Summary: ICE in warn_for_abs at gcc/c/c-parser.c:9226 since
r264368
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
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Reporter: marxin at gcc dot gnu.org
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I see some ICEs happening:
$ cat ice.i
int a;
int abs();
void b() { abs(a); }
$ gcc ice.i -Wabsolute-value -c
ice.i: In function ‘b’:
ice.i:3:1: internal compiler error: Segmentation fault
3 | void b() { abs(a); }
| ^~~~
0xce366f crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7f2113 tree_check(tree_node*, char const*, int, char const*, tree_code)
/home/marxin/Programming/gcc/gcc/tree.h:3112
0x7f2113 warn_for_abs
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9226
0x7f2113 c_parser_postfix_expression_after_primary
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9318
0x7e1c47 c_parser_postfix_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9006
0x7ebb82 c_parser_unary_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:7266
0x7ec9ff c_parser_cast_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:7110
0x7ecc73 c_parser_binary_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6913
0x7edb35 c_parser_conditional_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6647
0x7ee160 c_parser_expr_no_commas
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6564
0x7ee3b2 c_parser_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9460
0x7f0476 c_parser_expression_conv
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9493
0x7fc170 c_parser_statement_after_labels
/home/marxin/Programming/gcc/gcc/c/c-parser.c:5542
0x7fdf7e c_parser_compound_statement_nostart
/home/marxin/Programming/gcc/gcc/c/c-parser.c:5080
0x7fe6c6 c_parser_compound_statement
/home/marxin/Programming/gcc/gcc/c/c-parser.c:4914
0x7ffdb4 c_parser_declaration_or_fndef
/home/marxin/Programming/gcc/gcc/c/c-parser.c:2342
0x80675f c_parser_external_declaration
/home/marxin/Programming/gcc/gcc/c/c-parser.c:1643
0x806f99 c_parser_translation_unit
/home/marxin/Programming/gcc/gcc/c/c-parser.c:1524
0x806f99 c_parse_file()
/home/marxin/Programming/gcc/gcc/c/c-parser.c:18538
$ cat ice.c
void a(void) { abs(0); }
$ gcc -Wabsolute-value ice.c -c
ice.c: In function ‘a’:
ice.c:1:16: warning: implicit declaration of function ‘abs’
[-Wimplicit-function-declaration]
1 | void a(void) { abs(0); }
| ^~~
ice.c:1:1: internal compiler error: Segmentation fault
1 | void a(void) { abs(0); }
| ^~~~
0xce366f crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7f2113 tree_check(tree_node*, char const*, int, char const*, tree_code)
/home/marxin/Programming/gcc/gcc/tree.h:3112
0x7f2113 warn_for_abs
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9226
0x7f2113 c_parser_postfix_expression_after_primary
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9318
0x7e1c47 c_parser_postfix_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9006
0x7ebb82 c_parser_unary_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:7266
0x7ec9ff c_parser_cast_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:7110
0x7ecc73 c_parser_binary_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6913
0x7edb35 c_parser_conditional_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6647
0x7ee160 c_parser_expr_no_commas
/home/marxin/Programming/gcc/gcc/c/c-parser.c:6564
0x7ee3b2 c_parser_expression
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9460
0x7f0476 c_parser_expression_conv
/home/marxin/Programming/gcc/gcc/c/c-parser.c:9493
0x7fc170 c_parser_statement_after_labels
/home/marxin/Programming/gcc/gcc/c/c-parser.c:5542
0x7fdf7e c_parser_compound_statement_nostart
/home/marxin/Programming/gcc/gcc/c/c-parser.c:5080
0x7fe6c6 c_parser_compound_statement
/home/marxin/Programming/gcc/gcc/c/c-parser.c:4914
0x7ffdb4 c_parser_declaration_or_fndef
/home/marxin/Programming/gcc/gcc/c/c-parser.c:2342
0x80675f c_parser_external_declaration
/home/marxin/Programming/gcc/gcc/c/c-parser.c:1643
0x806f99 c_parser_translation_unit
/home/marxin/Programming/gcc/gcc/c/c-parser.c:1524
0x806f99 c_parse_file()
/home/marxin/Programming/gcc/gcc/c/c-parser.c:18538
>From gcc-bugs-return-615544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:33:58 2018
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 07:34:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to mi+gcc from comment #4)
> (In reply to Andrew Pinski from comment #3)
> > This is a binutils bug, in gold.
> > --enable-gold
> >
> > Please report this to binutils instead.
>
> Is there a work-around, perhaps?
Maybe you will get a better answer over at the binutils bugzilla. Do you know
what version of binutils you are using? Maybe test out the latest release.
>From gcc-bugs-return-615546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:34:46 2018
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Subject: [Bug c/87347] ICE in warn_for_abs at gcc/c/c-parser.c:9226 since r264368
Date: Tue, 18 Sep 2018 07:37:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-18
CC| |jamborm at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
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Subject: [Bug c++/87345] The compiler of the old version (for example: 4.9.3 version or 6.3.0 version) can stop the infinite cross-border loop, but the new version does not work.
Date: Tue, 18 Sep 2018 07:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87345
--- Comment #4 from jingtian at loongson dot cn ---
(In reply to Andrew Pinski from comment #3)
> *** Bug 87346 has been marked as a duplicate of this bug. ***
It might be because of the network, I submitted twice, sorry
>From gcc-bugs-return-615548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:39:10 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87344] archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative
Date: Tue, 18 Sep 2018 07:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87344
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-18
CC| |rguenth at gcc dot gnu.org
Version|6.4.1 |6.2.0
Ever confirmed|0 |1
Known to fail| |6.2.0, 6.4.0, 7.2.0
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with your gazillion command line flags, works fine with plain -Os.
Maybe you can remove the ones not necessary, it's hard to see if there's a
stupid user error.
>From gcc-bugs-return-615549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:41:14 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87196] ICE in vectorizable_load, at tree-vect-stmts.c:8043
Date: Tue, 18 Sep 2018 07:46:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
May I please ping this, can anybody reproduce that?
>From gcc-bugs-return-615550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 07:46:37 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87344] archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative, -mms-bitfields influences non-bitfield struct layout
Date: Tue, 18 Sep 2018 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI
Target| |x86_64-*-*, i?86-*-*
CC|rguenth at gcc dot gnu.org |
Component|c |target
Summary|archival/libarchive/decompr |archival/libarchive/decompr
|ess_gunzip.c:1139:2: error: |ess_gunzip.c:1139:2: error:
|size of unnamed array is |size of unnamed array is
|negative |negative, -mms-bitfields
| |influences non-bitfield
| |struct layout
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's -mms-bitfields which appearantly influences layout of the following
struct:
union {
unsigned char raw[8];
struct {
uint8_t gz_method;
uint8_t flags;
uint32_t mtime;
uint8_t xtra_flags_UNUSED;
uint8_t os_flags_UNUSED;
} __attribute__ ((__packed__)) formatted;
} header;
((void)sizeof(char[1 - 2*!!(sizeof(header) != 8)]));
Not sure if the difference is intended.
>From gcc-bugs-return-615551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:04:55 2018
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Subject: [Bug target/87344] archival/libarchive/decompress_gunzip.c:1139:2: error: size of unnamed array is negative, -mms-bitfields influences non-bitfield struct layout
Date: Tue, 18 Sep 2018 08:04:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed in r258075, thus dup.
*** This bug has been marked as a duplicate of bug 52991 ***
>From gcc-bugs-return-615553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:08:48 2018
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Subject: [Bug c++/87340] Stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 08:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Is the input a valid C++ mangled name of not?
>From gcc-bugs-return-615554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:08:56 2018
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Subject: [Bug c++/87333] A stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 08:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Is the input a valid C++ mangled name of not?
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Subject: [Bug target/52991] [6/7/8 Regression] attribute packed broken on mingw32?
Date: Tue, 18 Sep 2018 08:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |yellowriver2010 at hotmail dot com
--- Comment #35 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 87344 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:08:57 2018
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 08:22:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Is the input a valid C++ mangled name of not?
>From gcc-bugs-return-615556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:22:27 2018
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Tue, 18 Sep 2018 08:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87339
Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-18
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Confirmed and mine. Sorry about that, I only tested a previous iteration of
the patch on non-x86_64 systems.
>From gcc-bugs-return-615557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:34:09 2018
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Subject: [Bug sanitizer/67513] ASAN: Not optimal shadow value check (unlikely condition checked in fast path)
Date: Tue, 18 Sep 2018 08:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67513
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, I played with that a bit. It would be possible to optimize the code, but
before I see some significant speed up I'm not interested enough.
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Subject: [Bug c/87348] New: Implement -Watomic-implicit-seq-cst
Date: Tue, 18 Sep 2018 08:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87348
Bug ID: 87348
Summary: Implement -Watomic-implicit-seq-cst
Product: gcc
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Maybe we would like to implement the same warning as LLVM:
https://reviews.llvm.org/rL341860
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Subject: [Bug c/87348] Implement -Watomic-implicit-seq-cst
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87348
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Severity|normal |enhancement
>From gcc-bugs-return-615560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:51:04 2018
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 08:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87335
--- Comment #2 from Cheng Wen <wcventure at 126 dot com> ---
(In reply to Martin Liška from comment #1)
> Is the input a valid C++ mangled name of not?
Hi,
This input is obtained through fuzzing technology. Our fuzzer get some test
cases by mutating a valid input. This can not guarantee that this is a valid
C++ mangled name.
The program c++filt accepts the test case I uploaded. And this test case can
prove that c++filt have problems. When program c++filt executing this input, a
stack-overflow problem occurs. Please check this input and try to fix this bug
if necessary.
Thank you very much.
>From gcc-bugs-return-615561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 08:53:49 2018
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Subject: [Bug tree-optimization/87349] New: [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p or is_gimple_reg_type)
Date: Tue, 18 Sep 2018 09:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87349
Bug ID: 87349
Summary: [9 Regression] ICE: Segmentation fault (in
useless_type_conversion_p or is_gimple_reg_type)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
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Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180916 snapshot (r264351) ICEs when compiling the following
snippets w/ -O1 or -Og:
1.
void
h1 (int *fh, int pw)
{
*fh = 0;
if (*fh != 0)
for (;;)
{
fh = &pw;
if (pw == 0)
{
}
else
while (pw < 1)
{
if (pw == 0)
{
ut:
;
}
++pw;
}
if (pw == *fh)
goto ut;
}
goto ut;
}
% gcc-9.0.0-alpha20180916 -O1 -c nshv93ku.c
during GIMPLE pass: fre
nshv93ku.c: In function 'h1':
nshv93ku.c:30:1: internal compiler error: Segmentation fault
30 | }
| ^
0xcc84df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/toplev.c:325
0xa296f0 useless_type_conversion_p(tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.c:70
0xd0149c verify_gimple_assign_single
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4390
0xd0149c verify_gimple_assign
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4612
0xd0149c verify_gimple_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4880
0xd107b3 verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:5358
0xbe74af execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1943
0xbe839e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1997
2.
--- nshv93ku.c.jj 2018-09-18 15:40:38.439857690 +0700
+++ nshv93ku.c 2018-09-18 15:40:59.678335059 +0700
@@ -22,7 +22,7 @@ h1 (int *fh, int pw)
++pw;
}
- if (pw == 0)
+ if (pw == *fh)
goto ut;
}
during GIMPLE pass: fre
nshv93ku.c: In function 'h1':
nshv93ku.c:30:1: internal compiler error: Segmentation fault
30 | }
| ^
0xcc84df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/toplev.c:325
0xa2abc1 is_gimple_reg_type
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.h:75
0xa2abc1 is_gimple_val(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.c:789
0xd1044a verify_gimple_phi
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4975
0xd1044a verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:5303
0xbe74af execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1943
0xbe839e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1997
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Subject: [Bug c++/55588] Failure to diagnose non-template-id prefixed by keyword template
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-08-21 00:00:00 |2018-9-18
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
G++ and Clang still accept this, EDG still rejects it.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87340] Stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 09:10:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No. None of them look valid.
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87333] A stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 09:15:00 -0000
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--- Comment #2 from Cheng Wen <wcventure at 126 dot com> ---
(In reply to Martin Liška from comment #1)
> Is the input a valid C++ mangled name of not?
Hi,
This input is obtained through fuzzing technology. Our fuzzer get some test
cases by mutating a valid input. This can not guarantee that this is a valid
C++ mangled name.
The program c++filt accepts the test case I uploaded. And this test case can
prove that c++filt have problems. When program c++filt executing this input, a
stack-overflow problem occurs. Please check this input and try to fix this bug
if necessary.
Thank you very much.
>From gcc-bugs-return-615565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:15:42 2018
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 09:16:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, it's not a valid name. I can't reproduce a crash using the latest code from
GCC though.
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Subject: [Bug c++/87340] Stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 09:17:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Then it would deserve something like segfault-on-invalid-input :)
Or should I use ice-on-invalid-code?
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Subject: [Bug c++/81880] thread_local static member template initialisation fails
Date: Tue, 18 Sep 2018 09:32:00 -0000
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Latimerius <latimerius at seznam dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |latimerius at seznam dot cz
--- Comment #2 from Latimerius <latimerius at seznam dot cz> ---
This bug still seems to exist in the current 9.0 HEAD. Note also that another
possible work-around might be to wrap the thread_local member in an accessor
function, along the lines of
class A {
public:
template<typename T>
std::unordered_map<int,T> & get_m ()
{
thread_local static std::unordered_map<int,T> m;
return m;
}
};
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Subject: [Bug gcov-profile/85871] [8 Regression] g++.dg/gcov/gcov-8.C random failures
Date: Tue, 18 Sep 2018 09:36:00 -0000
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Sep 18 09:32:09 2018
New Revision: 264387
URL: https://gcc.gnu.org/viewcvs?rev=264387&root=gcc&view=rev
Log:
Backport r264363
2018-09-18 Martin Liska <mliska@suse.cz>
Backport from mainline
2018-09-17 Martin Liska <mliska@suse.cz>
PR gcov-profile/85871
* gcov.c (output_intermediate_file): Fix out of bounds
access.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/gcov.c
>From gcc-bugs-return-615569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:36:50 2018
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Subject: [Bug c/87347] ICE in warn_for_abs at gcc/c/c-parser.c:9226 since r264368
Date: Tue, 18 Sep 2018 09:38:00 -0000
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--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Bah, I should have thought about this. The following will fix it, I'll
properly test it and submit a patch later this week.
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 1766a256633..a96d15fef1d 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -9116,9 +9116,10 @@ warn_for_abs (location_t loc, tree fndecl, tree arg)
-Wint-conversion warnings. Most other wrong types hopefully lead to type
mismatch errors. TODO: Think about what to do with FIXED_POINT_TYPE_P
types and possibly other exotic types. */
- if (!INTEGRAL_TYPE_P (atype)
- && !SCALAR_FLOAT_TYPE_P (atype)
- && TREE_CODE (atype) != COMPLEX_TYPE)
+ if ((!INTEGRAL_TYPE_P (atype)
+ && !SCALAR_FLOAT_TYPE_P (atype)
+ && TREE_CODE (atype) != COMPLEX_TYPE)
+ || !TYPE_ARG_TYPES (TREE_TYPE (fndecl)))
return;
enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
>From gcc-bugs-return-615570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:38:51 2018
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Subject: [Bug c++/87350] New: NULL-Pointer problem in cplus-dem.c when executing program c++filt
Date: Tue, 18 Sep 2018 09:40:00 -0000
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Bug ID: 87350
Summary: NULL-Pointer problem in cplus-dem.c when executing
program c++filt
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
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Hi,
Our fuzzer caught NULL-Pointer problems in c++filt of the latest binutils code
base, those inputs will cause the segment faults and I have confirmed them with
address sanitizer.
Please use the “c++filt < $POC †to reproduce the bug.
Please check it and debug it. Thank you.
The ASAN dumps the stack trace as follows on POC1:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/npd_r_cplus-dem.c:1345_1.err.txt
AddressSanitizer:DEADLYSIGNAL
=================================================================
==23610==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x7f67702435a1 bp 0x7ffe2a376680 sp 0x7ffe2a375e08 T0)
==23610==The signal is caused by a READ memory access.
==23610==Hint: address points to the zero page.
#0 0x7f67702435a0
/build/glibc-OTsEL5/glibc-2.27/string/../sysdeps/x86_64/multiarch/strlen-avx2.S:59
#1 0x49728c in __interceptor_strlen.part.30
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x49728c)
#2 0x8c9caa in work_stuff_copy_to_from
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:1345:17
#3 0x8c553c in iterate_demangle_function
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:2731:3
#4 0x8b77ec in demangle_prefix
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:2971:14
#5 0x8b2d00 in internal_cplus_demangle
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:1253:14
#6 0x8afe53 in cplus_demangle
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:918:9
#7 0x513dd5 in demangle_it
/home/hongxu/FOT/binutils/BUILD/binutils/../../binutils/cxxfilt.c:62:12
#8 0x5139c9 in main
/home/hongxu/FOT/binutils/BUILD/binutils/../../binutils/cxxfilt.c:276:4
#9 0x7f67700d6b96 in __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#10 0x41a989 in _start
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x41a989)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/build/glibc-OTsEL5/glibc-2.27/string/../sysdeps/x86_64/multiarch/strlen-avx2.S:59
==23610==ABORTING
The ASAN dumps the stack trace as follows on POC2:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/npd_r_cplus-dem.c:1360_1.err.txt
AddressSanitizer:DEADLYSIGNAL
=================================================================
==23847==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x0000008ca218 bp 0x7ffe44bfad50 sp 0x7ffe44bfaa10 T0)
==23847==The signal is caused by a READ memory access.
==23847==Hint: address points to the zero page.
#0 0x8ca217 in work_stuff_copy_to_from
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:1360:25
#1 0x8c553c in iterate_demangle_function
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:2731:3
#2 0x8b77ec in demangle_prefix
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:2971:14
#3 0x8b2d00 in internal_cplus_demangle
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:1253:14
#4 0x8afe53 in cplus_demangle
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:918:9
#5 0x513dd5 in demangle_it
/home/hongxu/FOT/binutils/BUILD/binutils/../../binutils/cxxfilt.c:62:12
#6 0x5139c9 in main
/home/hongxu/FOT/binutils/BUILD/binutils/../../binutils/cxxfilt.c:276:4
#7 0x7ff52abf2b96 in __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#8 0x41a989 in _start
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x41a989)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:1360:25
in work_stuff_copy_to_from
==23847==ABORTING
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87350] NULL-Pointer problem in cplus-dem.c when executing program c++filt
Date: Tue, 18 Sep 2018 09:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87350
--- Comment #1 from Cheng Wen <wcventure at 126 dot com> ---
Created attachment 44714
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44714&action=edit
POC1
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87350] NULL-Pointer problem in cplus-dem.c when executing program c++filt
Date: Tue, 18 Sep 2018 09:50:00 -0000
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--- Comment #2 from Cheng Wen <wcventure at 126 dot com> ---
Created attachment 44715
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44715&action=edit
POC2
>From gcc-bugs-return-615573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:50:13 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 09:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87335
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-18
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Are you sure you attached the right file? When I try to demangle the attachment
it doesn't crash, the __cxa_demangle file returns -2, meaning the name is not
valid. That seems like the right result.
>From gcc-bugs-return-615574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:55:56 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87340] Stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 09:56:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The __cxa_demangle function returns 2 for each of these testcases, but the
cplus_demangle function segfaults.
>From gcc-bugs-return-615575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 09:56:49 2018
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 10:08:00 -0000
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--- Comment #5 from Cheng Wen <wcventure at 126 dot com> ---
(In reply to Jonathan Wakely from comment #4)
> Are you sure you attached the right file? When I try to demangle the
> attachment it doesn't crash, the __cxa_demangle file returns -2, meaning the
> name is not valid. That seems like the right result.
I have tried to reproduce this bug on different machines.
There are some questions to be confirmed.
(1) Do you use the latest version of binutils(binutils-2.32/binutils-2.31)? I
downloaded the package from here.
https://www.gnu.org/software/binutils/
(2) Please confirm that you have used the option "-t".
The command should be "./c++filt -t < $POC"
(3) Do you confirm this POC with address sanitizer?
>From gcc-bugs-return-615577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:09:19 2018
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Subject: [Bug c++/87333] A stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 10:09:00 -0000
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--- Comment #3 from Cheng Wen <wcventure at 126 dot com> ---
Created attachment 44716
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44716&action=edit
POC1
I have the new POC to add.
Please use the “c++filt < $POC †to reproduce the bug.
Please check it and debug it. Thank you.
POC1:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/so_cplus-dem.c:4960_1
The ASAN dumps the stack trace as follows on POC1:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/so_cplus-dem.c:4960_1.err.txt
AddressSanitizer:DEADLYSIGNAL
=================================================================
==24028==ERROR: AddressSanitizer: stack-overflow on address 0x7ffd854a7e18 (pc
0x000000497287 bp 0x7ffd854a8690 sp 0x7ffd854a7e20 T0)
#0 0x497286 in __interceptor_strlen.part.30
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x497286)
#1 0x8bdc7e in string_append
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4960:7
#2 0x8cb7f5 in demangle_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4578:7
#3 0x8cdff7 in demangle_nested_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4713:12
#4 0x8ad46a in do_type
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:3719:9
#5 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
...
...
...
#244 0x8ad46a in do_type
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:3719:9
#245 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
#246 0x8cc7b4 in demangle_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4659:9
#247 0x8cdff7 in demangle_nested_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4713:12
#248 0x8ad46a in do_type
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:3719:9
#249 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
SUMMARY: AddressSanitizer: stack-overflow
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x497286) in
__interceptor_strlen.part.30
==24028==ABORTING
>From gcc-bugs-return-615576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:08:25 2018
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
--- Comment #13 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This may be another case where it is worth it to print the inline stack AND
silence a warning whose inline stack is within pragma GCC diagnostics.
However, there seems to be another kind of missed optimization going on here.
>From gcc-bugs-return-615578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:09:59 2018
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Subject: [Bug c++/87333] A stack overflow problem for c++filt
Date: Tue, 18 Sep 2018 10:23:00 -0000
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--- Comment #4 from Cheng Wen <wcventure at 126 dot com> ---
Created attachment 44717
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44717&action=edit
POC2
I have the new POC to add.
Please use the “c++filt < $POC †to reproduce the bug.
Please check it and debug it. Thank you.
POC2:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/so_cplus-dem.c:4960_2
The ASAN dumps the stack trace as follows on POC2:
https://github.com/ntu-sec/pocs/blob/master/binutils-aff4a119/crashes/so_cplus-dem.c:4960_2.err.txt
AddressSanitizer:DEADLYSIGNAL
=================================================================
==24101==ERROR: AddressSanitizer: stack-overflow on address 0x7ffcd22d1fd8 (pc
0x000000497287 bp 0x7ffcd22d2850 sp 0x7ffcd22d1fe0 T0)
#0 0x497286 in __interceptor_strlen.part.30
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x497286)
#1 0x8bdc7e in string_append
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4960:7
#2 0x8cb7f5 in demangle_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4578:7
#3 0x8cdff7 in demangle_nested_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4713:12
#4 0x8ad46a in do_type
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:3719:9
#5 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
...
...
...
#245 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
#246 0x8cc7b4 in demangle_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4659:9
#247 0x8cdff7 in demangle_nested_args
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4713:12
#248 0x8ad46a in do_type
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:3719:9
#249 0x8cd8c6 in do_arg
/home/hongxu/FOT/binutils/BUILD/libiberty/../../libiberty/cplus-dem.c:4332:8
SUMMARY: AddressSanitizer: stack-overflow
(/home/hongxu/FOT/binutils/BUILD/install/bin/c++filt+0x497286) in
__interceptor_strlen.part.30
==24101==ABORTING
>From gcc-bugs-return-615579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:23:38 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 10:27:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Cheng Wen from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > Are you sure you attached the right file? When I try to demangle the
> > attachment it doesn't crash, the __cxa_demangle file returns -2, meaning the
> > name is not valid. That seems like the right result.
>
> I have tried to reproduce this bug on different machines.
> There are some questions to be confirmed.
>
> (1) Do you use the latest version of binutils(binutils-2.32/binutils-2.31)?
> I downloaded the package from here.
> https://www.gnu.org/software/binutils/
Built from the binutils-gdb git repo:
$ /tmp/binutils/bin/c++filt -v
GNU c++filt (GNU Binutils) 2.31.51.20180918
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
> (2) Please confirm that you have used the option "-t".
> The command should be "./c++filt -t < $POC"
$ /tmp/binutils/bin/c++filt -t < POC-t | wc
0 1 26539
$ echo $?
0
> (3) Do you confirm this POC with address sanitizer?
Yes it's linked to libasan
$ ldd /tmp/binutils/bin/c++filt
linux-vdso.so.1 (0x00007fff0618b000)
libasan.so.4 => /lib64/libasan.so.4 (0x00007fc372241000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fc37203d000)
libc.so.6 => /lib64/libc.so.6 (0x00007fc371c87000)
librt.so.1 => /lib64/librt.so.1 (0x00007fc371a7f000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fc371861000)
libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fc3714d9000)
libm.so.6 => /lib64/libm.so.6 (0x00007fc37118e000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fc370f77000)
/lib64/ld-linux-x86-64.so.2 (0x00007fc3731f9000)
>From gcc-bugs-return-615580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:27:40 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/85871] g++.dg/gcov/gcov-8.C random failures
Date: Tue, 18 Sep 2018 10:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
Summary|[8 Regression] |g++.dg/gcov/gcov-8.C random
|g++.dg/gcov/gcov-8.C random |failures
|failures |
Known to fail|8.2.0 |
--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on all active branches.
>From gcc-bugs-return-615581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:28:25 2018
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Subject: [Bug c++/87350] NULL-Pointer problem in cplus-dem.c when executing program c++filt
Date: Tue, 18 Sep 2018 10:28:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-18
Ever confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Cheng Wen from comment #1)
> Created attachment 44714 [details]
> POC1
You've uploaded two complete HTML pages saved from github, but the mangled name
that crash are just:
_GLOBAL_$D$__tf30___0__
__thunk_0__0__$__H1
$ echo '_GLOBAL_$D$__tf30___0__' | /tmp/binutils/bin/c++filt
ASAN:DEADLYSIGNAL
=================================================================
==6977==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x7f5fbbb47f31 bp 0x7fff4a202c20 sp 0x7fff4a202398 T0)
==6977==The signal is caused by a READ memory access.
==6977==Hint: address points to the zero page.
#0 0x7f5fbbb47f30 in __strlen_avx2 (/lib64/libc.so.6+0x155f30)
#1 0x7f5fbbffd27b (/lib64/libasan.so.4+0x5127b)
#2 0x497e34 in work_stuff_copy_to_from
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:1345
#3 0x49cdd8 in iterate_demangle_function
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:2731
#4 0x49d962 in demangle_prefix
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:2971
#5 0x49d962 in internal_cplus_demangle
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:1253
#6 0x498860 in cplus_demangle
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:918
#7 0x402ea5 in demangle_it (/tmp/binutils/bin/c++filt+0x402ea5)
#8 0x4037af in main (/tmp/binutils/bin/c++filt+0x4037af)
#9 0x7f5fbba12fe9 in __libc_start_main (/lib64/libc.so.6+0x20fe9)
#10 0x402d29 in _start (/tmp/binutils/bin/c++filt+0x402d29)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/lib64/libc.so.6+0x155f30) in __strlen_avx2
==6977==ABORTING
wraith:tmp$ echo '__thunk_0__0__$__H1' | /tmp/binutils/bin/c++filt
ASAN:DEADLYSIGNAL
=================================================================
==6981==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000497f27 bp 0x7ffc897891e0 sp 0x7ffc89789170 T0)
==6981==The signal is caused by a READ memory access.
==6981==Hint: address points to the zero page.
#0 0x497f26 in work_stuff_copy_to_from
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:1358
#1 0x49cdd8 in iterate_demangle_function
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:2731
#2 0x49d962 in demangle_prefix
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:2971
#3 0x49d962 in internal_cplus_demangle
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:1253
#4 0x498860 in cplus_demangle
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:918
#5 0x402ea5 in demangle_it (/tmp/binutils/bin/c++filt+0x402ea5)
#6 0x4037af in main (/tmp/binutils/bin/c++filt+0x4037af)
#7 0x7ff5a9a18fe9 in __libc_start_main (/lib64/libc.so.6+0x20fe9)
#8 0x402d29 in _start (/tmp/binutils/bin/c++filt+0x402d29)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/home/jwakely/src/binutils-gdb/libiberty/cplus-dem.c:1358 in
work_stuff_copy_to_from
==6981==ABORTING
>From gcc-bugs-return-615582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:28:34 2018
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 10:34:00 -0000
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--- Comment #7 from Cheng Wen <wcventure at 126 dot com> ---
(In reply to Jonathan Wakely from comment #6)
Considering the memory size of different machines, maybe more 'P' is needed to
trigger this bug in the input.
>From gcc-bugs-return-615583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:34:20 2018
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 10:40:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It still works for up to ten million characters:
$ for i in `seq 1 10` ; do printf P ; done | /tmp/binutils/bin/c++filt -t ;
echo
PPPPPPPPPP
$ for i in `seq 1 100` ; do printf P ; done | /tmp/binutils/bin/c++filt -t | wc
0 1 100
$ for i in `seq 1 1000` ; do printf P ; done | /tmp/binutils/bin/c++filt -t |
wc
0 1 1000
$ for i in `seq 1 10000` ; do printf P ; done | /tmp/binutils/bin/c++filt -t |
wc
0 1 10000
$ for i in `seq 1 100000` ; do printf P ; done | /tmp/binutils/bin/c++filt -t |
wc
0 1 100000
$ for i in `seq 1 1000000` ; do printf P ; done | /tmp/binutils/bin/c++filt -t
| wc
0 1 1000000
$ for i in `seq 1 10000000` ; do printf P ; done | /tmp/binutils/bin/c++filt -t
| wc
0 1 10000000
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Subject: [Bug c++/87350] NULL-Pointer problem in cplus-dem.c when executing program c++filt
Date: Tue, 18 Sep 2018 10:45:00 -0000
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--- Comment #4 from Cheng Wen <wcventure at 126 dot com> ---
Yes.
One input test case is "_GLOBAL_$D$__tf30___0__".
Another input test case is "__thunk_0__0__$__H1".
I see that you can you can reproduce this error. Do you know the reason for
this bug?
>From gcc-bugs-return-615585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 10:45:04 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/54052] g++ takes excessive time in opt and generate phase; can lead to Segmentation Fault when not enough memory available
Date: Tue, 18 Sep 2018 10:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54052
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-08-22 00:00:00 |2018-9-18
CC|redi at gcc dot gnu.org |
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Compiles successfully using i686-pc-linux-gnu, but takes a long time. As I
said, it's an unreasonably large expression (3883 lines!) so that's not
surprising. Don't write silly code if you don't have enough memory to compile
it.
I tried compiling it with Clang and it crashes.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87342] [9 Regression] ICE: verify_ssa failed (error: definition in block 10 does not dominate use in block 8)
Date: Tue, 18 Sep 2018 11:09:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thanks, that's another case similar to PR87263 where we cannot use
dominated_by_p_w_unex. But I think the error is in computation of max_rpo
for BB 15 which is 6 instead of 13. Because we're supposed to mark the
respective edges executable.
Needs more thinking.
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/87351] New: misleading error message: missing binary operator before token "("
Date: Tue, 18 Sep 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87351
Bug ID: 87351
Summary: misleading error message: missing binary operator
before token "("
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
Target Milestone: ---
The error message
error: missing binary operator before token "("
from the preprocessor is misleading in general, as in most cases, it is not a
binary operator that is missing, but the error is due to the use of sizeof, a
cast, or a function-like macro that is not defined. The preprocessor could
either output a fixed error message that would reflect the most common
misusages, or try to guess what is wrong (like the use of sizeof or something
that looks like a cast).
For instance:
$ cat tst.c
#if sizeof(int) > 4
#endif
$ gcc-snapshot -E tst.c
# 1 "tst.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "tst.c"
tst.c:1:11: error: missing binary operator before token "("
1 | #if sizeof(int) > 4
| ^
Some users can get confused. For instance, see:
*
https://stackoverflow.com/questions/21338385/what-does-the-compiler-error-missing-binary-operator-before-token-mean
*
https://cboard.cprogramming.com/c-programming/158452-error-missing-binary-operator-before-token.html
*
https://www.linuxquestions.org/questions/programming-9/missing-binary-operator-before-token-4175547706/
* https://forum.kde.org/viewtopic.php?f=269&t=128141
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From: "jason.duerstock at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/87338] gcc 8.2 fails to bootstrap on ia64
Date: Tue, 18 Sep 2018 11:13:00 -0000
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--- Comment #3 from Jason Duerstock <jason.duerstock at gmail dot com> ---
Yes. From the Debian build log:
https://buildd.debian.org/status/fetch.php?pkg=gcc-7&arch=ia64&ver=7.3.0-29&stamp=1536161281&raw=0
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
Date: Tue, 18 Sep 2018 11:17:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I have a patch.
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Subject: [Bug target/87330] ICE in scan_rtx_reg, at regrename.c:1097
Date: Tue, 18 Sep 2018 11:34:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|2018-09-17 00:00:00 |2018-09-18
Assignee|unassigned at gcc dot gnu.org |siddhesh at gotplt dot org
Ever confirmed|0 |1
--- Comment #3 from ktkachov at gcc dot gnu.org ---
Assigning.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/87351] misleading error message: missing binary operator before token "("
Date: Tue, 18 Sep 2018 11:46:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-18
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From: "jeremy at jeremysanders dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87352] New: Large stack usage with new gfortran
Date: Tue, 18 Sep 2018 12:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87352
Bug ID: 87352
Summary: Large stack usage with new gfortran
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: jeremy at jeremysanders dot net
Target Milestone: ---
Created attachment 44718
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44718&action=edit
Affected module and example main program
With gcc/gfortran 7.3 and 8.2, creation of a variable in the main program with
a particular type defined in a module (attached) leads to a segfault due to
very large stack usage. This worked on gcc 4.8.4 and earlier versions.
In addition compilation of the module creates an object file which is x10000
times larger than for earlier gcc versions (200MB vs 25KB). With optimization
(-O2), the compilation time is several minutes, rather than less than a second.
Instructions for compilation:
$ gfortran -ffixed-line-length-none -ffree-line-length-none -g -O2 -o testcomb
testcomb.f90
testcomb.f90:1303:0:
end module testmodule
note: variable tracking size limit exceeded with -fvar-tracking-assignments,
retrying without
$ ./testcomb
$ gdb ./testcomb
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
...
(gdb) run
Starting program: /home/jsanders/tmp/foo/testcomb
Program received signal SIGSEGV, Segmentation fault.
testprog () at testcomb.f90:1309
1309 type(instlist_type),target :: instlist
It works if the stack is increased to 819200.
This problem is seen using Ubuntu Bionic (18.04) on x86-64, using the built-in
gcc (7.3.0), or a self-compiled version (8.2.0) with no special build options.
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Subject: [Bug other/87353] New: gcc man page formatting issue due to leading spaces in .texi contents
Date: Tue, 18 Sep 2018 12:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87353
Bug ID: 87353
Summary: gcc man page formatting issue due to leading spaces in
.texi contents
Product: gcc
Version: 9.0
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The gcc(1) man page (gcc.1) shows as:
Therefore, the G++ and driver automatically adds -shared-libgcc
whenever you build a shared library or a main executable, because
C++
programs typically use exceptions, so this is the right thing to
do.
This is due to gcc/doc/invoke.texi containing leading spaces:
Therefore, the G++ and driver automatically adds @option{-shared-libgcc}
whenever you build a shared library or a main executable, because C++
programs typically use exceptions, so this is the right thing to do.
Removing these spaces should solve the problem (I haven't checked other parts
of the manual), but AFAIK, such spaces are valid and do not yield any issue in
generated .info files. Thus the real bug could be in conversion utilities
(contrib/texi2pod.pl, provided by GCC, or pod2man).
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Subject: [Bug other/87353] gcc man page formatting issue due to leading spaces in .texi contents
Date: Tue, 18 Sep 2018 12:53:00 -0000
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--- Comment #1 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
The bug may be in contrib/texi2pod.pl as the following pod text is generated:
Therefore, the G++ and driver automatically adds B<-shared-libgcc>
whenever you build a shared library or a main executable, because C++
programs typically use exceptions, so this is the right thing to do.
and the pod specification says: "A verbatim paragraph is distinguished by
having its first character be a space or a tab."
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From: "wcventure at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87335] The stack overflow in function cplus_demangle_type in cp-demangle.c:2565 (c++filt -t)
Date: Tue, 18 Sep 2018 13:03:00 -0000
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--- Comment #9 from Cheng Wen <wcventure at 126 dot com> ---
(In reply to Jonathan Wakely from comment #8)
Hi Jonathan,
I debugged with this POC again. I still think it's a problem. I will show you
the debug process as follow.
> $ gdb ./c++filt
> Reading symbols from ./c++filt...done.
> (gdb) set args -t < POC-t
> (gdb) b cp-demangle.c:2565
> Breakpoint 1 at 0x8d5227: file ./cp-demangle.c, line 2565.
> (gdb) start
> (gdb) c
> Continuing.
> Breakpoint 1, cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> 2565 cplus_demangle_type (di), NULL);
> (gdb) c
> Continuing.
> Breakpoint 1, cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> 2565 cplus_demangle_type (di), NULL);
> ...
> ...
> ...
> (gdb) c
> Continuing.
> Breakpoint 1, cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> 2565 cplus_demangle_type (di), NULL);
> (gdb) bt
> #0 cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #1 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #2 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #3 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #4 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> ...
> ...
> ...
> #456 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #457 0x00000000008d523d in cplus_demangle_type (di=0x7fffffffd560) at ./cp-demangle.c:2565
> #458 0x00000000008dd318 in d_demangle_callback (mangled=0x18b2e40 <main.mbuffer> 'P' <repeats 200 times>..., options=283,
> callback=0x8dc110 <d_growable_string_callback_adapter>, opaque=0x7fffffffd860) at ./cp-demangle.c:6245
> #459 0x00000000008dc84f in d_demangle (mangled=0x18b2e40 <main.mbuffer> 'P' <repeats 200 times>..., options=283,
> palc=0x7fffffffd9e0) at ./cp-demangle.c:6299
> #460 0x00000000008dc696 in cplus_demangle_v3 (mangled=0x18b2e40 <main.mbuffer> 'P' <repeats 200 times>..., options=283)
> at ./cp-demangle.c:6456
> #461 0x00000000008b1cf4 in cplus_demangle (mangled=0x18b2e40 <main.mbuffer> 'P' <repeats 200 times>..., options=27)
> at ./cplus-dem.c:880
> #462 0x0000000000517676 in demangle_it (mangled_name=0x18b2e40 <main.mbuffer> 'P' <repeats 200 times>...) at cxxfilt.c:62
> #463 0x000000000051726a in main (argc=2, argv=0x7fffffffe008) at cxxfilt.c:276
Using gdb to debug it. I set a breakpoint in cp-demangle.c:2565. After reaching
this breakpoint for any time. You can see the stack backtrace.
This will consume a lot of stack memory.
(Caution: the command such as "gdb --args ./c++filt -t < $POC" is not valid.
Please use "gdb ./c++filt", then "set args -t < $POC")
Thanks
Cheng Wen
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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| |illa/show_bug.cgi?id=23499
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
This sounds like
https://sourceware.org/bugzilla/show_bug.cgi?id=23499
Please try binutils 2.31 branch.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 18 13:26:05 2018
New Revision: 264388
URL: https://gcc.gnu.org/viewcvs?rev=264388&root=gcc&view=rev
Log:
2018-09-18 Richard Biener <rguenther@suse.de>
PR middle-end/63155
* tree-ssa-coalesce.c (tree_int_map_hasher): Remove.
(compute_samebase_partition_bases): Likewise.
(coalesce_ssa_name): Always use compute_optimized_partition_bases.
(gimple_can_coalesce_p): Simplify.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-coalesce.c
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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mi+gcc at aldan dot algebra.com changed:
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--- Comment #7 from mi+gcc at aldan dot algebra.com ---
(In reply to H.J. Lu from comment #6)
> This sounds like
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=23499
>
> Please try binutils 2.31 branch.
Actually, I have binutils-2.31 already -- the /usr/bin/as, that comes with
RHEL6, does not understand the AVX2 instructions, so I had to build binutils of
my own, and, of course, used the latest available:
% /prod/pfe/local/bin/ld -v
GNU ld (GNU Binutils) 2.31
and the ld used by gfortran (see the verbose output I posted) is a hardlink to
the above:
%
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-gnu/bin/ld
GNU ld (GNU Binutils) 2.31
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to mi+gcc from comment #7)
> (In reply to H.J. Lu from comment #6)
> > This sounds like
> >
> > https://sourceware.org/bugzilla/show_bug.cgi?id=23499
> >
> > Please try binutils 2.31 branch.
>
> Actually, I have binutils-2.31 already -- the /usr/bin/as, that comes with
> RHEL6, does not understand the AVX2 instructions, so I had to build binutils
> of my own, and, of course, used the latest available:
>
> % /prod/pfe/local/bin/ld -v
> GNU ld (GNU Binutils) 2.31
>
> and the ld used by gfortran (see the verbose output I posted) is a hardlink
> to the above:
>
> %
> /prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../x86_64-pc-linux-
> gnu/bin/ld
> GNU ld (GNU Binutils) 2.31
I said binutils 2.31 branch, not 2.31 release.
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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--- Comment #9 from mi+gcc at aldan dot algebra.com ---
> I said binutils 2.31 branch, not 2.31 release.
The work I'm doing is meant for eventual production use. The company has
swallowed the use of free software, but using _unreleased_ versions may be too
much.
Is there a particular patch, you want me to apply to 2.31 release? I could do
that... Is this it, for example:
https://sourceware.org/ml/binutils/2018-08/msg00227.html
?
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Tue Sep 18 13:52:30 2018
New Revision: 264391
URL: https://gcc.gnu.org/viewcvs?rev=264391&root=gcc&view=rev
Log:
[PATCH c++/86881] -Wshadow-local-compatible ICE
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00984.html
PR c++/86881
cp/
* name-lookup.c (check_local_shadow): Ignore auto types.
testsuite/
* g++.dg/warn/pr86881.C: New.
Added:
trunk/gcc/testsuite/g++.dg/warn/pr86881.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug other/87353] gcc man page formatting issue due to leading spaces in .texi contents
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was introduced by r242433
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/doc/invoke.texi?limit_changes=0&r1=242433&r2=242432&pathrev=242433
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Subject: [Bug other/87353] gcc man page formatting issue due to leading spaces in .texi contents
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also, "Therefore, the G++ and driver" is nonsense.
>From gcc-bugs-return-615605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 13:59:22 2018
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Subject: [Bug target/87104] missed &, == optimization makes Emacs ~0.4% slower on x86-64
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pipcet at gmail dot com changed:
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is obsolete| |
--- Comment #14 from pipcet at gmail dot com ---
Created attachment 44719
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44719&action=edit
WIP patch
Okay, I've run into a few issues:
1. temacs run time changes unpredictably based on the configuration data,
because of find_string_data_in_pure.
2. My CPU fuses "cmp" and a conditional branch and "test" and a conditional
branch, but not "and" and a conditional branch. So we were optimizing a
three-insn two-uop sequence into a two-insn two-uop sequence, and I was not
seeing any performance improvement.
3. The code size changes sometimes cause branches to be mispredicted much more
often for no apparent reason.
I've worked around (1) and (2), by disabling find_string_data_in_pure() and
making the peephole rule that turned "test" into "and" conditional on CPU type.
Now I'm seeing a consistent performance improvement (as well as fewer
instructions, fewer uops, and more fused branches) for Perl and Emacs.
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
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ktkachov at gcc dot gnu.org changed:
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Fixed on arm and aarch64 with r264392.
If you can confirm this fixes the other platforms please close this off.
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far, branches to follow.
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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--- Comment #10 from mi+gcc at aldan dot algebra.com ---
(In reply to mi+gcc from comment #9)
> Is this it, for example:
>
> https://sourceware.org/ml/binutils/2018-08/msg00227.html
Applied the patch to the 2.31 release, rebuilt/reinstalled binutils -- problem
is still here...
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Subject: [Bug other/87353] gcc man page formatting issue due to leading spaces in .texi contents
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87353
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Sep 18 14:19:55 2018
New Revision: 264395
URL: https://gcc.gnu.org/viewcvs?rev=264395&root=gcc&view=rev
Log:
PR other/87353 fix formatting and grammar in manual
The changes to invoke.texi in r242433 left some unwanted spaces that
texi2pod.pl interprets as verbatim formatting. There are also some
grammatical errors due to the removal of references to GCJ, where the
G++ driver is referred to in the plural.
PR other/87353
* doc/invoke.texi (Link Options): Fix formatting and grammar.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 14:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87341
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to mi+gcc from comment #10)
> (In reply to mi+gcc from comment #9)
> > Is this it, for example:
> >
> > https://sourceware.org/ml/binutils/2018-08/msg00227.html
>
> Applied the patch to the 2.31 release, rebuilt/reinstalled binutils --
> problem is still here...
Please show the output of:
$ objdump -T
/prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.so
| grep corrupt
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From: "mi+gcc at aldan dot algebra.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 14:47:00 -0000
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--- Comment #12 from mi+gcc at aldan dot algebra.com ---
(In reply to H.J. Lu from comment #11)
> Please show the output of:
>
> $ objdump -T
> /prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.
> so | grep corrupt
Neither the stock /usr/bin/objdump nor the newer /prod/pfe/local/bin/objdump
report any corruption (used grep -i just in case).
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From: "jbeulich at novell dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87354] New: x86-64: 16- and 32-byte register variables cannot be put in XMM16/YMM16 and up without -mavx512vl
Date: Tue, 18 Sep 2018 14:49:00 -0000
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Bug ID: 87354
Summary: x86-64: 16- and 32-byte register variables cannot be
put in XMM16/YMM16 and up without -mavx512vl
Product: gcc
Version: 8.2.0
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The same issue had been present in gas, but was corrected by commit 6e041cf4b0:
YMM (and of course also XMM) registers can certainly be used with AVX512F
alone, just that the set of insns is pretty limited. I realize that making this
work may not be a trivial change, as assumptions to this effect appear to be
made all over the place, but this code should imo compile (and assemble) fine
with just -mavx512f, while currently only the first function compiles without
error (QI mode vectors have been used just for simplicity and to make things
look reasonably uniform):
asm(".arch generic64");
asm(".arch .avx512f");
typedef char __attribute__((vector_size(64))) v64qi_t;
typedef char __attribute__((vector_size(16))) v16qi_t;
typedef char __attribute__((vector_size(32))) v32qi_t;
v64qi_t test512(v64qi_t x) {
register v64qi_t y asm("zmm16");
asm("vmovdqa32 %1,%0" : "=v" (y) : "v" (x));
return y;
}
v16qi_t test128(v64qi_t x) {
register v16qi_t y asm("xmm16");
asm("vpmovqw %1,%0" : "=v" (y) : "v" (x));
return y;
}
v32qi_t test256(v64qi_t x) {
register v32qi_t y asm("ymm16");
asm("vpmovqd %1,%0" : "=v" (y) : "v" (x));
return y;
}
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Tue Sep 18 15:06:35 2018
New Revision: 264396
URL: https://gcc.gnu.org/viewcvs?rev=264396&root=gcc&view=rev
Log:
[PATCH c++/86881] -Wshadow-local-compatible ICE
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00984.html
PR c++/86881
cp/
* name-lookup.c (check_local_shadow): Ignore auto types.
testsuite/
* g++.dg/warn/pr86881.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/warn/pr86881.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/name-lookup.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
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--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to mi+gcc from comment #12)
> (In reply to H.J. Lu from comment #11)
> > Please show the output of:
> >
> > $ objdump -T
> > /prod/pfe/local/lib/gcc/x86_64-pc-linux-gnu/8/../../../../lib64/libgfortran.
> > so | grep corrupt
>
> Neither the stock /usr/bin/objdump nor the newer /prod/pfe/local/bin/objdump
> report any corruption (used grep -i just in case).
Please try binutils 2.31 branch from:
https://sourceware.org/git/?p=binutils-gdb.git;a=shortlog;h=refs/heads/binutils-2_31-branch
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Subject: [Bug c++/85137] [concepts] ICE with undeclared concept
Date: Tue, 18 Sep 2018 15:08:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC|paolo.carlini at oracle dot com |
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed trunk r264391.
Fixed gcc-8 r264396.
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Subject: [Bug c++/87340] Stack overflow problem for c++filt
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> Then it would deserve something like segfault-on-invalid-input :)
> Or should I use ice-on-invalid-code?
Let's use ice-on-invalid. Otherwise the two will end up being used
interchangeably over time.
>From gcc-bugs-return-615618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 15:29:23 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87341] gfortran can not link executables: _edata: invalid version 21 (max 4)
Date: Tue, 18 Sep 2018 15:43:00 -0000
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--- Comment #14 from mi+gcc at aldan dot algebra.com ---
(In reply to H.J. Lu from comment #13)
> Please try binutils 2.31 branch from:
>
> https://sourceware.org/git/?p=binutils-gdb.git;a=shortlog;h=refs/heads/
> binutils-2_31-branch
I'm sorry, I can not do that at this time -- I need to deliver the software for
my employer and rebuilding the gcc suit with --disable-gold provides a
work-around.
I think, this bug-report -- against the compiler suit neither working with the
latest release of binutils, nor warning about it -- ought to remain open for
reasons I put forth in comment#4.
The underlying problem with binutils deserves its own ticket, as Andrew
suggests in comment#3. I think, I've given enough information for anyone to be
able to reproduce the problem:
1. Build the gcc suit with the configure-arguments provided
2. Attempt to use the newly-built gfortran to build a FORTRAN program:
PRINT *, "Hello World!"
END
I could create this ticket for you, if you insist, but you should be able to
reproduce the problem yourself now. Thank you.
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #15 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to mi+gcc from comment #14)
> (In reply to H.J. Lu from comment #13)
> > Please try binutils 2.31 branch from:
> >
> > https://sourceware.org/git/?p=binutils-gdb.git;a=shortlog;h=refs/heads/
> > binutils-2_31-branch
>
> I'm sorry, I can not do that at this time -- I need to deliver the software
> for my employer and rebuilding the gcc suit with --disable-gold provides a
> work-around.
>
> I think, this bug-report -- against the compiler suit neither working with
> the latest release of binutils, nor warning about it -- ought to remain open
> for reasons I put forth in comment#4.
>
> The underlying problem with binutils deserves its own ticket, as Andrew
> suggests in comment#3. I think, I've given enough information for anyone to
> be able to reproduce the problem:
>
As I said, the problem is fixed on binutils 2.31 branch.
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Sep 18 16:19:56 2018
New Revision: 264400
URL: https://gcc.gnu.org/viewcvs?rev=264400&root=gcc&view=rev
Log:
Handle CLOBBER in reg_overlap_mentioned_p (PR86882)
Combine will put CLOBBER (with a non-void mode) anywhere in a pattern
to poison it. reg_overlap_mentioned_p did not handle this. This patch
fixes that.
PR rtl-optimization/86882
* rtlanal.c (reg_overlap_mentioned_p): Handle CLOBBER.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/rtlanal.c
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Sep 18 16:24:58 2018
New Revision: 264401
URL: https://gcc.gnu.org/viewcvs?rev=264401&root=gcc&view=rev
Log:
Backport PR86882 fix to 8
PR rtl-optimization/86882
* rtlanal.c (reg_overlap_mentioned_p): Handle CLOBBER.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/rtlanal.c
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on trunk and 8; closing as fixed.
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Subject: [Bug c++/85065] [concepts] ICE with invalid use of a concept
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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Subject: [Bug c++/85065] [concepts] ICE with invalid use of a concept
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Sep 18 16:35:27 2018
New Revision: 264402
URL: https://gcc.gnu.org/viewcvs?rev=264402&root=gcc&view=rev
Log:
/cp
2018-09-18 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85065
* cp-tree.h (NON_ERROR): New.
* pt.c (auto_hash::hash): Use it.
(do_auto_deduction): Likewise.
/testsuite
2018-09-18 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85065
* g++.dg/concepts/pr85065.C: New.
Added:
trunk/gcc/testsuite/g++.dg/concepts/pr85065.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/67491] [meta-bug] concepts issues
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Bug 67491 depends on bug 85065, which changed state.
Bug 85065 Summary: [concepts] ICE with invalid use of a concept
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85065
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/85954] [8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:266
Date: Tue, 18 Sep 2018 17:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85954
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Sep 18 17:54:20 2018
New Revision: 264404
URL: https://gcc.gnu.org/viewcvs?rev=264404&root=gcc&view=rev
Log:
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85954
* resolve.c (resolve_assoc_var): If the target expression is a
deferred charlen dummy and the associate name shares the
charlen, generate a new one. Make sure that new charlens are in
the namespace list so that they get cleaned up.
* trans-array.c (gfc_is_reallocatable_lhs): Associate names are
not reallocatable.
* trans-decl.c (gfc_get_symbol_decl): Put deferred character
length dummy and result arrays on the deferred initialization
list so that the variable length arrays can be correctly dealt
with.
* trans-expr.c (gfc_conv_string_length): Return if 'expr' is
NULL rather than ICEing.
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85954
* gfortran.dg/deferred_character_21.f90 : New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/deferred_character_21.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/fortran/trans-array.c
branches/gcc-8-branch/gcc/fortran/trans-decl.c
branches/gcc-8-branch/gcc/fortran/trans-expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87336] [8/9 regression] wrong output for pointer dummy assiocated to target actual argument
Date: Tue, 18 Sep 2018 18:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87336
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Sep 18 17:58:20 2018
New Revision: 264405
URL: https://gcc.gnu.org/viewcvs?rev=264405&root=gcc&view=rev
Log:
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87336
* trans-array.c (gfc_get_array_span): Try to get the element
length of incomplete types. Return NULL_TREE otherwise.
(gfc_conv_expr_descriptor): Only set the 'span' field if the
above does not return NULL_TREE. Set 'span' field if possible
for all new descriptors.
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87336
* gfortran.dg/pointer_array_10.f90 : New test.
* gfortran.dg/assign_10.f90 : Increase 'parm' count to 20.
* gfortran.dg/transpose_optimization_2.f90 : Increase 'parm'
count to 72.
Added:
trunk/gcc/testsuite/gfortran.dg/pointer_array_10.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assign_10.f90
trunk/gcc/testsuite/gfortran.dg/transpose_optimization_2.f90
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Subject: [Bug fortran/85954] [8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:266
Date: Tue, 18 Sep 2018 18:41:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on both branches.
Many thanks for the report.
Paul
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Subject: [Bug target/87355] New: missed comparison optimizations (grep DFA, x86-64)
Date: Tue, 18 Sep 2018 18:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87355
Bug ID: 87355
Summary: missed comparison optimizations (grep DFA, x86-64)
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at cs dot ucla.edu
Target Milestone: ---
Created attachment 44720
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44720&action=edit
source code illustrating missed optimizations
I found this when attempting to tune grep's DFA code on x86-64, and simplified
the issue to the attached source code t.c which defines two functions f and g
that are logically equivalent, and which can both be implemented via a single
machine-language comparison to THRESHOLD. However, GCC generates two
comparisons for f and three comparisons for g, as shown in the attached
assembly-language file t.s generated by 'gcc -O2 -S t.c'. I am running Fedora
28 x86-64 with 8.1.1 20180712 (Red Hat 8.1.1-5).
I'm not sure whether this problem is limited to x86-64 or is more general, and
for now am labeling its component as 'target'.
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Subject: [Bug target/87355] missed comparison optimizations (grep DFA, x86-64)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87355
--- Comment #1 from eggert at cs dot ucla.edu ---
Created attachment 44721
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44721&action=edit
Assembly-language output of 'gcc -O2 -S t.c'
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Subject: [Bug tree-optimization/87355] missed comparison optimizations (grep DFA, x86-64)
Date: Tue, 18 Sep 2018 19:17:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Component|target |tree-optimization
Severity|normal |enhancement
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
Date: Tue, 18 Sep 2018 19:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86830
--- Comment #6 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue Sep 18 19:16:24 2018
New Revision: 264407
URL: https://gcc.gnu.org/viewcvs?rev=264407&root=gcc&view=rev
Log:
2018-09-18 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/86830
* expr.c (gfc_is_simply_contiguous): Handle type-bound procedure calls
with non-polymorphic objects.
2018-09-18 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/86830
* gfortran.dg/typebound_call_30.f90: New test case.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/typebound_call_30.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86830] [8/9 Regression] Contiguous array pointer function result not recognized as contiguous
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #7 from janus at gcc dot gnu.org ---
Fixed on 9-trunk and 8-branch. Closing. Thanks for the report!
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Subject: [Bug libstdc++/87356] New: Enum members are missing in std::filesystem::perms
Date: Tue, 18 Sep 2018 19:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87356
Bug ID: 87356
Summary: Enum members are missing in std::filesystem::perms
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: christian_hoff at gmx dot net
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The enumeration std::filesystem::perms (introduced with C++17 and available
since GCC 8.0) is missing the following enum members:
* add_perms
* remove_perms
* resolve_symlinks
Other enum members are all there, but these three are missing (even though they
are defined in the C++17 standard). I confirmed this by looking at the file
"/usr/include/c++/8/bits/fs_fwd.h" of my GCC 8.2.0 installation.
The standard that defines these enum members can be found here:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0218r1.html#enum.perms
Please fix this issue.
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Subject: [Bug libstdc++/87356] Enum members are missing in std::filesystem::perms
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Hoff from comment #0)
> The standard that defines these enum members can be found here:
> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0218r1.html#enum.
> perms
That's not the standard. The final C++17 standard doesn't have those
enumerators, it uses the new std::filesystem::perm_options enumeration type
instead.
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Subject: [Bug libstdc++/87356] Enum members are missing in std::filesystem::perms
Date: Tue, 18 Sep 2018 19:35:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0492r2.html#Late37
for the change to the spec that happened post-P0218R1.
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Subject: [Bug libstdc++/87356] Enum members are missing in std::filesystem::perms
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Christian Hoff <christian_hoff at gmx dot net> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Christian Hoff <christian_hoff at gmx dot net> ---
I see. Thanks a lot for the fast feedback, that was really helpful!
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Subject: [Bug fortran/87239] ICE in deferred-length string
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87239
--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Sep 18 19:35:53 2018
New Revision: 264409
URL: https://gcc.gnu.org/viewcvs?rev=264409&root=gcc&view=rev
Log:
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87239
* trans-expr.c (gfc_trans_assignment_1): The rse.pre for the
assignment of deferred character elemental function results to
a realocatable lhs must not be added to the exterior block but
must go to the loop body.
2018-09-18 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87239
* gfortran.dg/elemental_function_2.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/elemental_function_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
Date: Tue, 18 Sep 2018 19:54:00 -0000
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--- Comment #10 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue Sep 18 19:50:17 2018
New Revision: 264410
URL: https://gcc.gnu.org/viewcvs?rev=264410&root=gcc&view=rev
Log:
2018-09-18 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/85395
* decl.c (match_binding_attributes): Use correct default accessibility
for procedure pointer components.
2018-09-18 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/85395
* gfortran.dg/proc_ptr_comp_52.f90: New test case.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/proc_ptr_comp_52.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85395] [F03] private clause contained in derived type acquires spurious scope
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janus at gcc dot gnu.org changed:
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--- Comment #11 from janus at gcc dot gnu.org ---
Fixed on 9-trunk and 8-branch. Closing.
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Subject: [Bug fortran/36854] [meta-bug] fortran front-end optimization
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Bug 36854 depends on bug 29550, which changed state.
Bug 29550 Summary: Optimize -fexternal-blas calls for conjg()
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29550
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----------------------------------------------------------------------------
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29550
--- Comment #14 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Tue Sep 18 19:59:46 2018
New Revision: 264411
URL: https://gcc.gnu.org/viewcvs?rev=264411&root=gcc&view=rev
Log:
2018-09-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/29550
* gfortran.h (gfc_expr): Add external_blas flag.
* frontend-passes.c (matrix_case): Add case A2TB2T.
(optimize_namespace): Handle flag_external_blas by
calling call_external_blas.
(get_array_inq_function): Add argument okind. If
it is nonzero, use it as the kind of argument
to be used.
(inline_limit_check): Remove m_case argument, add
limit argument instead. Remove assert about m_case.
Set the limit for inlining from the limit argument.
(matmul_lhs_realloc): Handle case A2TB2T.
(inline_matmul_assign): Handle inline limit for other cases with
two rank-two matrices. Remove no-op calls to inline_limit_check.
(call_external_blas): New function.
* trans-intrinsic.c (gfc_conv_intrinsic_funcall): Do not add
argument to external BLAS if external_blas is already set.
2018-09-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/29550
* gfortran.dg/inline_matmul_13.f90: Adjust count for
_gfortran_matmul.
* gfortran.dg/inline_matmul_16.f90: Likewise.
* gfortran.dg/promotion_2.f90: Add -fblas-matmul-limit=1. Scan
for dgemm instead of dgemm_. Add call to random_number to make
standard conforming.
* gfortran.dg/matmul_blas_1.f90: New test.
* gfortran.dg/matmul_bounds_14.f: New test.
* gfortran.dg/matmul_bounds_15.f: New test.
* gfortran.dg/matmul_bounds_16.f: New test.
* gfortran.dg/blas_gemm_routines.f: New test / additional file for
preceding tests.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/29550] Optimize -fexternal-blas calls for conjg()
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #15 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed, closing.
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Subject: [Bug fortran/37131] inline matmul for small matrix sizes
Date: Tue, 18 Sep 2018 20:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37131
Bug 37131 depends on bug 29550, which changed state.
Bug 29550 Summary: Optimize -fexternal-blas calls for conjg()
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29550
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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Subject: [Bug fortran/87239] ICE in deferred-length string
Date: Tue, 18 Sep 2018 20:18:00 -0000
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Paul Thomas from comment #5)
> (In reply to Dominique d'Humieres from comment #4)
> > Duplicate of/ related to pr77325 and pr84109.
>
> PR84109 is completely different. The array descriptor 'elem_len' is being
> set to zero during the allocation.
I do apologize. It is not precisely the same but only insomuch as an intrinsic
elemental function is involved, rather than an extrinsic.
Cheers
Paul
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Subject: [Bug fortran/29550] Optimize -fexternal-blas calls for conjg()
Date: Tue, 18 Sep 2018 20:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29550
--- Comment #16 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Tue Sep 18 20:18:09 2018
New Revision: 264412
URL: https://gcc.gnu.org/viewcvs?rev=264412&root=gcc&view=rev
Log:
2018-09-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/29550
* gfortran.h (gfc_expr): Add external_blas flag.
* frontend-passes.c (matrix_case): Add case A2TB2T.
(optimize_namespace): Handle flag_external_blas by
calling call_external_blas.
(get_array_inq_function): Add argument okind. If
it is nonzero, use it as the kind of argument
to be used.
(inline_limit_check): Remove m_case argument, add
limit argument instead. Remove assert about m_case.
Set the limit for inlining from the limit argument.
(matmul_lhs_realloc): Handle case A2TB2T.
(inline_matmul_assign): Handle inline limit for other cases with
two rank-two matrices. Remove no-op calls to inline_limit_check.
(call_external_blas): New function.
* trans-intrinsic.c (gfc_conv_intrinsic_funcall): Do not add
argument to external BLAS if external_blas is already set.
2018-09-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/29550
* gfortran.dg/inline_matmul_13.f90: Adjust count for
_gfortran_matmul.
* gfortran.dg/inline_matmul_16.f90: Likewise.
* gfortran.dg/promotion_2.f90: Add -fblas-matmul-limit=1. Scan
for dgemm instead of dgemm_. Add call to random_number to make
standard conforming.
* gfortran.dg/matmul_blas_1.f90: New test.
* gfortran.dg/matmul_bounds_14.f: New test.
* gfortran.dg/matmul_bounds_15.f: New test.
* gfortran.dg/matmul_bounds_16.f: New test.
* gfortran.dg/blas_gemm_routines.f: New test / additional file for
preceding tests.
Added:
trunk/gcc/testsuite/gfortran.dg/blas_gemm_routines.f
trunk/gcc/testsuite/gfortran.dg/matmul_blas_1.f
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_14.f
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_15.f
trunk/gcc/testsuite/gfortran.dg/matmul_bounds_16.f
Modified:
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/gfortran.dg/inline_matmul_13.f90
trunk/gcc/testsuite/gfortran.dg/inline_matmul_16.f90
trunk/gcc/testsuite/gfortran.dg/promotion_2.f90
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84109] ICE in adjustl on allocatable array of strings
Date: Tue, 18 Sep 2018 20:21:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44722
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44722&action=edit
A fix for the PR
I am sorry that this has taken so long. I have run out of time to commit this
evening but will do so tomorrow night.
Thanks for the report.
Paul
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Tue, 18 Sep 2018 20:36:00 -0000
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--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #2 from ktkachov at gcc dot gnu.org ---
> Fixed on arm and aarch64 with r264392.
> If you can confirm this fixes the other platforms please close this off.
This didn't work on sparc: for both 32 and 64-bit:
for another:
-FAIL: gcc.dg/warn-abs-1.c (test for warnings, line 48)
+FAIL: gcc.dg/warn-abs-1.c (test for warnings, line 49)
i.e. the failure remains, just the line number changed due to the
addition of the dg-skip-if.
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From: "fdumont at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
Date: Tue, 18 Sep 2018 20:42:00 -0000
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--- Comment #2 from François Dumont <fdumont at gcc dot gnu.org> ---
Author: fdumont
Date: Tue Sep 18 20:36:16 2018
New Revision: 264413
URL: https://gcc.gnu.org/viewcvs?rev=264413&root=gcc&view=rev
Log:
2018-09-18 François Dumont <fdumont@gcc.gnu.org>
PR libstdc++/87135
* src/c++11/hashtable_c++0x.cc:
(_Prime_rehash_policy::_M_next_bkt): Return a prime no smaller than
requested size, but not necessarily greater.
(_Prime_rehash_policy::_M_need_rehash): Rehash only if target size is
strictly greater than next resize threshold.
* testsuite/23_containers/unordered_map/modifiers/reserve.cc: Adapt
test
to validate that there is no rehash as long as number of insertion is
lower or equal to the reserved number of elements.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/hashtable_c++0x.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
>From gcc-bugs-return-615650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 20:42:19 2018
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/67202] Fortran FE should load scalar pass-by-reference intent-in arguments at the beginning of a function
Date: Tue, 18 Sep 2018 21:11:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |tkoenig at gcc dot gnu.org
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> Is there an easy way to check than a scalar pass-by-reference intent-in
> argument has been loaded at the beginning of the function?
Easiest to check the *.original dump.
If the code looks like
x (integer(kind=4) & restrict i, integer(kind=4) & restrict j)
{
*j = *i;
}
then it hasn't been done.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87355] missed comparison optimizations (grep DFA, x86-64)
Date: Tue, 18 Sep 2018 23:11:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
For f, this is a classic case where gcc canonicalizes n>=100 as n>99, and thus
cannot as easily merge it with the other comparison n==100.
For g, n >= 103 || n == 100 || n == 101 || n == 102 is replaced in the
front-end with (n > 102 || n == 100) || (unsigned int) n + 4294967195 <= 1,
that's a bit strange. Merging comparisons into a range test is normal, but why
merge precisely tests 3 and 4? Inserting || n == 99 before n == 100 yields the
even stranger ((n > 102 || n == 99) || (unsigned int) n + 4294967196 <= 1) || n
== 102...
>From gcc-bugs-return-615652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 23:11:46 2018
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Subject: [Bug target/86902] [9 Regression] ICE: in as_a, at machmode.h:356 at -O
Date: Tue, 18 Sep 2018 23:25:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This does not fail for me. Does it need some extra settings?
>From gcc-bugs-return-615653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 23:25:14 2018
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Subject: [Bug target/86902] [9 Regression] ICE: in as_a, at machmode.h:356 at -O
Date: Tue, 18 Sep 2018 23:47:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah, it's the checking flags. Confirmed.
>From gcc-bugs-return-615654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 23:47:33 2018
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87357] New: Bogus conversion with conversion function not detected
Date: Tue, 18 Sep 2018 23:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87357
Bug ID: 87357
Summary: Bogus conversion with conversion function not detected
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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[class.conv.fct]:
A conversion function is never used to convert a (possibly cv-qualified) object
to the (possibly cv-qualified) same object type (or a reference to it), to a
(possibly cv-qualified) base class of that type (or a reference to it), or to
(possibly cv-qualified) void.
But:
$ cat q.C
struct X {
operator X();
};
$ ./cc1plus -quiet q.C -Wconversion -Wall -Wextra -Wpedantic
>From gcc-bugs-return-615655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 18 23:48:07 2018
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Subject: [Bug c++/87357] Bogus conversion with conversion function not detected
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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>From gcc-bugs-return-615656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 00:09:46 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Wed, 19 Sep 2018 04:06:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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Last reconfirmed| |2018-09-19
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--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Thanks; confirmed.
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Wed, 19 Sep 2018 04:10:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #3)
> > --- Comment #2 from ktkachov at gcc dot gnu.org ---
> > Fixed on arm and aarch64 with r264392.
> > If you can confirm this fixes the other platforms please close this off.
>
> This didn't work on sparc: for both 32 and 64-bit:
> for another:
>
> -FAIL: gcc.dg/warn-abs-1.c (test for warnings, line 48)
> +FAIL: gcc.dg/warn-abs-1.c (test for warnings, line 49)
>
> i.e. the failure remains, just the line number changed due to the
> addition of the dg-skip-if.
Same on aarch64-linux-gnu.
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86881
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I see an error in the new testcase:
g++.dg/warn/pr86881.C -std=c++11: syntax error in target selector "c++11" for
" dg-do 2 compile { c++11 } "
>From gcc-bugs-return-615659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 04:58:33 2018
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Subject: [Bug c/87358] New: ICE when -mtune=thunderx2t99 applied
Date: Wed, 19 Sep 2018 05:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87358
Bug ID: 87358
Summary: ICE when -mtune=thunderx2t99 applied
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: Lijian.Zhang at arm dot com
Target Milestone: ---
lijian@armada8040-1:~/ICE.issue$ gcc --version
gcc (Ubuntu/Linaro 7.3.0-16ubuntu3) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
lijian@armada8040-1:~/ICE.issue$ cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.1 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.1 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
lijian@armada8040-1:~/ICE.issue$ lscpu
Architecture: aarch64
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 2
Vendor ID: ARM
Model: 1
Model name: Cortex-A72
Stepping: r0p1
CPU max MHz: 2000.0000
CPU min MHz: 100.0000
BogoMIPS: 50.00
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32
lijian@armada8040-1:~/ICE.issue$ gcc -c l2_learn.i -O2
-march=armv8.1-a+crc+crypto -mtune=thunderx2t99
/home/lijian/tasks/dualQuad/origin/src/vnet/l2/l2_learn.c: In function
‘l2learn_node_fn_thunderx2t99’:
/home/lijian/tasks/dualQuad/origin/src/vnet/l2/l2_learn.c:430:1: internal
compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
lijian@armada8040-1:~/ICE.issue$ gcc -c l2_learn.i -O2
-march=armv8.1-a+crc+crypto
lijian@armada8040-1:~/ICE.issue$
lijian@armada8040-1:~/ICE.issue$
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Subject: [Bug c/87358] ICE when -mtune=thunderx2t99 applied
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Lijian Zhang <Lijian.Zhang at arm dot com> changed:
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----------------------------------------------------------------------------
CC| |Lijian.Zhang at arm dot com
--- Comment #1 from Lijian Zhang <Lijian.Zhang at arm dot com> ---
Created attachment 44723
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44723&action=edit
pre-process file
>From gcc-bugs-return-615661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 05:14:51 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] New: [9.0 regression] pointer being freed was not allocated
Date: Wed, 19 Sep 2018 05:32:00 -0000
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Bug ID: 87359
Summary: [9.0 regression] pointer being freed was not allocated
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There is a severe regression introduced in the last 2-3 weeks (maybe through
one of the bug fixes by Paul Thomas?) leading to a huge number of failures in
our test suite. I will try to isolate it, but it can also be checked by
downloading https://whizard.hepforge.org/downloads/?f=whizard-2.6.4.tar.gz
(you need OCaml for most of the tests, but not for all, many of the unit tests
already fail without OCaml being present, you can then configure with
--disable-ocaml). Do configure, make, make check.
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
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François Dumont <fdumont at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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Assignee|unassigned at gcc dot gnu.org |fdumont at gcc dot gnu.org
--- Comment #3 from François Dumont <fdumont at gcc dot gnu.org> ---
Rehash policy has been reviewed, rehash will take place only when reserved size
is overwhelmed.
>From gcc-bugs-return-615664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 07:11:19 2018
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Subject: [Bug tree-optimization/87342] [9 Regression] ICE: verify_ssa failed (error: definition in block 10 does not dominate use in block 8)
Date: Wed, 19 Sep 2018 07:11:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 19 07:10:42 2018
New Revision: 264419
URL: https://gcc.gnu.org/viewcvs?rev=264419&root=gcc&view=rev
Log:
2018-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/87349
PR tree-optimization/87342
* tree-ssa-sccvn.c (do_rpo_vn): Iterate max_rpo computation.
* gcc.dg/torture/pr87349-1.c: New testcase.
* gcc.dg/torture/pr87349-2.c: Likewise.
* gcc.dg/torture/pr87342.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87342.c
trunk/gcc/testsuite/gcc.dg/torture/pr87349-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr87349-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-615663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 06:09:12 2018
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
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François Dumont <fdumont at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |9.0
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Subject: [Bug tree-optimization/87349] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p or is_gimple_reg_type)
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 19 07:10:42 2018
New Revision: 264419
URL: https://gcc.gnu.org/viewcvs?rev=264419&root=gcc&view=rev
Log:
2018-09-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/87349
PR tree-optimization/87342
* tree-ssa-sccvn.c (do_rpo_vn): Iterate max_rpo computation.
* gcc.dg/torture/pr87349-1.c: New testcase.
* gcc.dg/torture/pr87349-2.c: Likewise.
* gcc.dg/torture/pr87342.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87342.c
trunk/gcc/testsuite/gcc.dg/torture/pr87349-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr87349-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
TOT now for the alternate testcase at -O1+ exhibits
Time variable usr sys wall
GGC
...
tree CCP : 9.21 ( 64%) 0.00 ( 0%) 9.22 ( 63%)
244 kB ( 0%)
...
TOTAL : 14.35 0.22 14.57
521240 kB
never seen CCP take that much time.
All time is spent in bitmap_set_bit called by add_ssa_edge from
ssa_propagation_engine::simulate_stmt.
It sets stmt UIDs in the ssa_edge_worklist.
Note on that testcase CCP really does a lot (disabling CCP makes things only
slower), which means the testcase is quite artificial. There are
752492 stmts at the point the SSA propagator starts to run and as out-of-SSA
coalescing told us bits are spread in an unfortunate way here.
Sorting the uses we walk in add_ssa_edge after gimple_uid doesn't help much.
We're still processing bits like 4, 1509, 3014, 4519, 6024, 7529, 9034, ...
Assigning UIDs lazily in that very function improves things (as expected),
but we still have
tree CCP : 3.82 ( 43%) 0.00 ( 0%) 3.83 ( 42%)
244 kB ( 0%)
after that. I'll dig a bit further later.
>From gcc-bugs-return-615667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 07:39:58 2018
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Subject: [Bug tree-optimization/87360] New: [8/9 Regression] ICE in remove_redundant_iv_tests at gcc/tree-ssa-loop-ivcanon.c:571 since r255467
Date: Wed, 19 Sep 2018 07:40:00 -0000
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Bug ID: 87360
Summary: [8/9 Regression] ICE in remove_redundant_iv_tests at
gcc/tree-ssa-loop-ivcanon.c:571 since r255467
Product: gcc
Version: 9.0
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One unroll and jam ICE I can see:
$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/function_optimize_2.f90
-fno-tree-dce -O3 --param max-completely-peeled-insns=0
during GIMPLE pass: ivcanon
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/function_optimize_2.f90:3:0:
3 | program main
|
internal compiler error: Segmentation fault
0xb20c5f crash_signal
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-x86_64/build/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xc1ff23 remove_redundant_iv_tests
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-x86_64/build/gcc/tree-ssa-loop-ivcanon.c:571
0xc1ff23 canonicalize_loop_induction_variables
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-x86_64/build/gcc/tree-ssa-loop-ivcanon.c:1248
0xc22553 canonicalize_induction_variables()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-x86_64/build/gcc/tree-ssa-loop-ivcanon.c:1294
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug tree-optimization/87360] [8/9 Regression] ICE in remove_redundant_iv_tests at gcc/tree-ssa-loop-ivcanon.c:571 since r255467
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #28 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44724
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44724&action=edit
patch for the SSA propagator issue
Using an sbitmap helps. I am testing the attached.
>From gcc-bugs-return-615670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 07:51:04 2018
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Subject: [Bug tree-optimization/87342] [9 Regression] ICE: verify_ssa failed (error: definition in block 10 does not dominate use in block 8)
Date: Wed, 19 Sep 2018 07:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-615671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 07:52:18 2018
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Subject: [Bug tree-optimization/87349] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p or is_gimple_reg_type)
Date: Wed, 19 Sep 2018 07:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/87338] gcc 8.2 fails to bootstrap on ia64
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--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
I cannot reproduce that with the current 8.2 branch.
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Subject: [Bug target/87288] [8/9 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
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--- Comment #6 from bin cheng <amker at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> it's set here:
>
> if (!is_gimple_val (niters_vector))
> {
> var = create_tmp_var (type, "bnd");
> gimple_seq stmts = NULL;
> niters_vector = force_gimple_operand (niters_vector, &stmts, true,
> var);
> gsi_insert_seq_on_edge_immediate (pe, stmts);
> /* Peeling algorithm guarantees that vector loop bound is at least ONE,
> we set range information to make niters analyzer's life easier. */
> if (stmts != NULL && log_vf)
> set_range_info (niters_vector, VR_RANGE,
> wi::to_wide (build_int_cst (type, 1)),
> wi::to_wide (fold_build2 (RSHIFT_EXPR, type,
> TYPE_MAX_VALUE (type),
> log_vf)));
>
> and the loop is
>
> <bb 5> [local count: 105119325]:
> niters.0_25 = (unsigned int) n_15;
> ni_gap.1_36 = niters.0_25 + 4294967295;
> # RANGE [1, 2147483647] NONZERO 2147483647
> bnd.2_37 = ni_gap.1_36 >> 1;
>
> <bb 4> [local count: 567644349]:
> # ivtmp_50 = PHI <ivtmp_51(6), 0(5)>
> ivtmp_51 = ivtmp_50 + 1;
> if (ivtmp_51 >= bnd.2_37)
> goto <bb 12>; [16.67%]
> else
> goto <bb 6>; [83.33%]
>
> <bb 6> [local count: 473036958]:
> goto <bb 4>; [100.00%]
>
> which looks good according to the comment. So the number of iterations
> _is_ bnd.2_37 - 1 (that number may be zero).
Not really. The code was added under assumption that vector code is guarded by
condition in peeling.
Dump for vect is like:
<bb 2> [local count: 161061274]:
# PT = { D.2425 } (escaped, escaped heap)
# USE = nonlocal null { D.2425 } (escaped, escaped heap)
# CLB = nonlocal null { D.2425 } (escaped, escaped heap)
_10 = operator new [] (32);
_10->_M_elems0 = 0.0;
MEM[(struct array2 *)_10 + 16B]._M_elems0 = 0.0;
# RANGE [-2147483648, 2147483647] NONZERO 4294967294
n_14 = argc_13(D) * 2;
if (n_14 <= 0)
goto <bb 3>; [15.00%]
else
goto <bb 5>; [85.00%]
<bb 3> [local count: 161061274]:
# USE = nonlocal null { D.2425 } (escaped, escaped heap)
# CLB = nonlocal null { D.2425 } (escaped, escaped heap)
operator delete [] (_10);
jacobianTransposeds ={v} {CLOBBER};
return 0;
<bb 5> [local count: 136902083]:
niters.0_25 = (unsigned int) n_14;
ni_gap.1_36 = niters.0_25 + 4294967295;
# RANGE [1, 2147483647] NONZERO 2147483647
bnd.2_37 = ni_gap.1_36 >> 1;
<bb 4> [local count: 739271244]:
# RANGE [0, 2147483647] NONZERO 2147483647
# i_21 = PHI <i_16(6), 0(5)>
# PT = null { D.2425 } (escaped, escaped heap)
# ALIGN = 8, MISALIGN = 0
# vectp.5_40 = PHI <vectp.5_41(6), _10(5)>
# PT = { D.2388 }
# ALIGN = 16, MISALIGN = 0
# vectp_jacobianTransposeds.9_47 = PHI <vectp_jacobianTransposeds.9_48(6),
&jacobianTransposeds(5)>
# ivtmp_50 = PHI <ivtmp_51(6), 0(5)>
# RANGE [0, 2147483646] NONZERO 2147483647
_1 = (long unsigned int) i_21;
# RANGE [0, 34359738336] NONZERO 34359738352
_2 = _1 * 16;
# PT = null { D.2425 } (escaped, escaped heap)
_3 = _10 + _2;
_6 = _1 * 8;
# PT = { D.2388 }
# ALIGN = 8, MISALIGN = 0
_4 = &jacobianTransposeds + _6;
vect__5.7_42 = MEM[(double *)vectp.5_40];
# PT = null { D.2425 } (escaped, escaped heap)
# ALIGN = 8, MISALIGN = 0
vectp.5_43 = vectp.5_40 + 16;
vect__5.8_44 = MEM[(double *)vectp.5_43];
vect_perm_even_45 = VEC_PERM_EXPR <vect__5.7_42, vect__5.8_44, { 0, 2 }>;
vect_perm_odd_46 = VEC_PERM_EXPR <vect__5.7_42, vect__5.8_44, { 1, 3 }>;
_5 = _3->_M_elems0;
MEM[(double &)vectp_jacobianTransposeds.9_47] = vect_perm_even_45;
# RANGE [1, 2147483647] NONZERO 2147483647
i_16 = i_21 + 1;
# PT = null { D.2425 } (escaped, escaped heap)
vectp.5_41 = vectp.5_43 + 16;
# PT = { D.2388 }
# ALIGN = 16, MISALIGN = 0
vectp_jacobianTransposeds.9_48 = vectp_jacobianTransposeds.9_47 + 16;
ivtmp_51 = ivtmp_50 + 1;
if (ivtmp_51 >= bnd.2_37)
goto <bb 12>; [16.67%]
else
goto <bb 6>; [83.33%]
<bb 9> [local count: 136902081]:
goto <bb 3>; [100.00%]
<bb 6> [local count: 616059372]:
goto <bb 4>; [100.00%]
<bb 12> [local count: 136902083]:
niters_vector_mult_vf.3_38 = bnd.2_37 << 1;
tmp.4_39 = (int) niters_vector_mult_vf.3_38;
<bb 13> [local count: 912680552]:
# RANGE [0, 2147483647] NONZERO 2147483647
# i_24 = PHI <i_29(14), tmp.4_39(12)>
# RANGE [0, 2147483646] NONZERO 2147483647
_19 = (long unsigned int) i_24;
# RANGE [0, 34359738336] NONZERO 34359738352
_33 = _19 * 16;
# PT = null { D.2425 } (escaped, escaped heap)
_26 = _10 + _33;
_27 = _19 * 8;
# PT = { D.2388 }
# ALIGN = 8, MISALIGN = 0
_28 = &jacobianTransposeds + _27;
_31 = _26->_M_elems0;
MEM[(double &)_28] = _31;
# RANGE [1, 2147483647] NONZERO 2147483647
i_29 = i_24 + 1;
if (n_14 <= i_29)
goto <bb 9>; [15.00%]
else
goto <bb 14>; [85.00%]
<bb 14> [local count: 775778470]:
goto <bb 13>; [100.00%]
This is no peeling guard condition skipping vector loop anymore. In case of
"argc_13(D) == 1", the vector loop body is executed exactly once (corresponding
2 times before vectorization); after vector loop, the epilog loop body is
executed 2 times again (for the same iteration as done in vector loop). There
is two problems here:
A) it's at least inefficient when ("argc_13(D) == 1" && !SVE).
B) Given the vector loop is not guarded by peeling condition anymore, range
info as you noted should not be set for bnd.2_37, because it could take value
ZERO.
Change in peeling is made by revision 256635, specifically, by below code
changes:
+ poly_uint64 bound_epilog = 0;
+ if (!LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
+ && LOOP_VINFO_PEELING_FOR_NITER (loop_vinfo))
+ bound_epilog += vf - 1;
+ if (LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo))
+ bound_epilog += 1;
//......
@@ -2577,10 +2593,8 @@ vect_do_peeling (loop_vec_info loop_vinfo, tree niters,
tree nitersm1,
if (skip_vector)
{
/* Additional epilogue iteration is peeled if gap exists. */
- bool peel_for_gaps = LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo);
tree t = vect_gen_scalar_loop_niters (niters_prolog, prolog_peeling,
- bound_prolog,
- peel_for_gaps ? vf : vf - 1,
+ bound_prolog, bound_epilog,
Now bound_epilog == 1 is passed into vect_gen_scalar_loop_niters, rather than
vf (== 2), this causes no peeling condition is generated.
Either below condition is too strict here or we need to identify and skip
setting range info in this case:
+ if (!LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
+ && LOOP_VINFO_PEELING_FOR_NITER (loop_vinfo))
+ bound_epilog += vf - 1;
Thanks
>From gcc-bugs-return-615675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 08:40:03 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Wed, 19 Sep 2018 08:40:00 -0000
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--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
My intention is to move the _Float128 bits a to a special test for x86_64... on
Friday.
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Subject: [Bug libstdc++/87356] Enum members are missing in std::filesystem::perms
Date: Wed, 19 Sep 2018 08:40:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|FIXED |INVALID
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Subject: [Bug tree-optimization/87361] New: [9 regression] gcc.target/sparc/20161111-1.c FAILs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87361
Bug ID: 87361
Summary: [9 regression] gcc.target/sparc/20161111-1.c FAILs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.*
Between 20180917 (r264370) and 20180918 (r264402),
gcc.target/sparc/20161111-1.c
started to FAIL on Solaris/SPARC (both 32 and 64-bit):
+FAIL: gcc.target/sparc/20161111-1.c scan-assembler-not and\\t%
E.g. the 32-bit test gained an additional
--- trunk/11.5-gcc-64/build/gcc/testsuite/gcc/20161111-1.s 2018-09-18
23:00:46.174608900 +0000
+++ trunk/11.5-gcc/build/gcc/testsuite/gcc/20161111-1.s 2018-09-18
22:59:54.273714595 +0000
@@ -10,6 +10,7 @@
ldub [%g1+%o0], %g1
mov 0, %o0
add %g1, -48, %g1
+ and %g1, 0xff, %g1
cmp %g1, 9
jmp %o7+8
movleu %icc, 1, %o0
>From gcc-bugs-return-615676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 08:40:42 2018
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Subject: [Bug fortran/87359] [9.0 regression] pointer being freed was not allocated
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org,
| |tkoenig at gcc dot gnu.org
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hi Paul,
just a heads-up.
>From gcc-bugs-return-615678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 08:41:34 2018
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Subject: [Bug tree-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-615679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 09:04:57 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
Date: Wed, 19 Sep 2018 09:18:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-19
CC| |segher at kernel dot crashing.org
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
r264400 by Segher contains unrelated bits:
https://gcc.gnu.org/ml/gcc-cvs/2018-09/msg00377.html
>From gcc-bugs-return-615680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 09:18:35 2018
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Subject: [Bug debug/87362] New: GCC produces with LTO debug info with which gdb is not happy about
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362
Bug ID: 87362
Summary: GCC produces with LTO debug info with which gdb is not
happy about
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Building Firefox:
https://github.com/marxin/gecko-dev/tree/lto-stable
with:
$ OPT="-O2" MYFLAGS="-march=native -flifetime-dse=1 -g -flto=8" nice ./mach
build -v
one can see:
../../gdb/dwarf2read.c:9730: internal-error: void
dw2_add_symbol_to_list(symbol*, pending**): Assertion `(*listhead) == NULL ||
(SYMBOL_LANGUAGE ((*listhead)->symbol[0]) == SYMBOL_LANGUAGE (symbol))' failed.
Hard to say whether it's caused by GCC or GDB.
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Subject: [Bug tree-optimization/87355] missed comparison optimizations (grep DFA, x86-64)
Date: Wed, 19 Sep 2018 10:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> For f, this is a classic case where gcc canonicalizes n>=100 as n>99, and
> thus cannot as easily merge it with the other comparison n==100.
>
> For g, n >= 103 || n == 100 || n == 101 || n == 102 is replaced in the
> front-end with (n > 102 || n == 100) || (unsigned int) n + 4294967195 <= 1,
> that's a bit strange. Merging comparisons into a range test is normal, but
> why merge precisely tests 3 and 4? Inserting || n == 99 before n == 100
> yields the even stranger ((n > 102 || n == 99) || (unsigned int) n +
> 4294967196 <= 1) || n == 102...
We have two places where we perform these range optimizations, in fold-const.c
and in the reassoc pass. The optimization in fold-const.c is able to merge
just adjacent ranges, so if you sort the comparisons properly in the source
code (either ascending, or descending, but not randomly or intermixed with
checks to other variables), it is optimized, otherwise it isn't. Looking
through some more nested ||s or &&s like the toplevel operation would be
possible (if all the ||/&& expressions are simple_operand_p_2), but would have
to be with some upper bound, otherwise we run into compile time complexity
problems.
The reassoc pass is more capable here, it gathers all the comparisons at once,
provided there are no other statements in between those and no other side
effects, sorts them according to the variables being compared and ranges for
those. The reason why it doesn't do anything on this weird testcase is the
nested == THRESHOLD comparison in there, where jump threading in dom2 pass
comes before reassoc1 and threads it first, so reassoc1 doesn't see something
it can optimize anymore. You can see what you get with -O2
-fno-tree-dominator-opts by disabling the jump threading, then reassoc
optimizes the 3 range tests (the last two adjacent being merged in the FE
already) into one.
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
Date: Wed, 19 Sep 2018 10:13:00 -0000
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Sep 19 10:12:04 2018
New Revision: 264420
URL: https://gcc.gnu.org/viewcvs?rev=264420&root=gcc&view=rev
Log:
PR rtl-optimization/87361
* rtlanal.c (nonzero_bits1): Revert accidental change.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/rtlanal.c
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Subject: [Bug fortran/87359] [9.0 regression] pointer being freed was not allocated
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--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 44725
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44725&action=edit
First (lengthy) reproducer for the pointer issue
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Accidental change reverted.
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
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--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Thanks Christophe, I noticed that when checking the 8 backport and committed a
fix, so updating should make it work.
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Subject: [Bug fortran/87359] [9.0 regression] pointer being freed was not allocated
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--- Comment #3 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This is a first (rather lengthy) reproducer. I still try to cut it out further.
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87288] [8/9 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Wed, 19 Sep 2018 10:46:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 19 Sep 2018, amker at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87288
>
> --- Comment #6 from bin cheng <amker at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #5)
> > it's set here:
> >
> > if (!is_gimple_val (niters_vector))
> > {
> > var = create_tmp_var (type, "bnd");
> > gimple_seq stmts = NULL;
> > niters_vector = force_gimple_operand (niters_vector, &stmts, true,
> > var);
> > gsi_insert_seq_on_edge_immediate (pe, stmts);
> > /* Peeling algorithm guarantees that vector loop bound is at least ONE,
> > we set range information to make niters analyzer's life easier. */
> > if (stmts != NULL && log_vf)
> > set_range_info (niters_vector, VR_RANGE,
> > wi::to_wide (build_int_cst (type, 1)),
> > wi::to_wide (fold_build2 (RSHIFT_EXPR, type,
> > TYPE_MAX_VALUE (type),
> > log_vf)));
> >
> > and the loop is
> >
> > <bb 5> [local count: 105119325]:
> > niters.0_25 = (unsigned int) n_15;
> > ni_gap.1_36 = niters.0_25 + 4294967295;
> > # RANGE [1, 2147483647] NONZERO 2147483647
> > bnd.2_37 = ni_gap.1_36 >> 1;
> >
> > <bb 4> [local count: 567644349]:
> > # ivtmp_50 = PHI <ivtmp_51(6), 0(5)>
> > ivtmp_51 = ivtmp_50 + 1;
> > if (ivtmp_51 >= bnd.2_37)
> > goto <bb 12>; [16.67%]
> > else
> > goto <bb 6>; [83.33%]
> >
> > <bb 6> [local count: 473036958]:
> > goto <bb 4>; [100.00%]
> >
> > which looks good according to the comment. So the number of iterations
> > _is_ bnd.2_37 - 1 (that number may be zero).
>
> Not really. The code was added under assumption that vector code is guarded by
> condition in peeling.
>
> Dump for vect is like:
> <bb 2> [local count: 161061274]:
> # PT = { D.2425 } (escaped, escaped heap)
> # USE = nonlocal null { D.2425 } (escaped, escaped heap)
> # CLB = nonlocal null { D.2425 } (escaped, escaped heap)
> _10 = operator new [] (32);
> _10->_M_elems0 = 0.0;
> MEM[(struct array2 *)_10 + 16B]._M_elems0 = 0.0;
> # RANGE [-2147483648, 2147483647] NONZERO 4294967294
> n_14 = argc_13(D) * 2;
> if (n_14 <= 0)
> goto <bb 3>; [15.00%]
> else
> goto <bb 5>; [85.00%]
>
> <bb 3> [local count: 161061274]:
> # USE = nonlocal null { D.2425 } (escaped, escaped heap)
> # CLB = nonlocal null { D.2425 } (escaped, escaped heap)
> operator delete [] (_10);
> jacobianTransposeds ={v} {CLOBBER};
> return 0;
>
> <bb 5> [local count: 136902083]:
> niters.0_25 = (unsigned int) n_14;
> ni_gap.1_36 = niters.0_25 + 4294967295;
> # RANGE [1, 2147483647] NONZERO 2147483647
> bnd.2_37 = ni_gap.1_36 >> 1;
>
> <bb 4> [local count: 739271244]:
> # RANGE [0, 2147483647] NONZERO 2147483647
> # i_21 = PHI <i_16(6), 0(5)>
> # PT = null { D.2425 } (escaped, escaped heap)
> # ALIGN = 8, MISALIGN = 0
> # vectp.5_40 = PHI <vectp.5_41(6), _10(5)>
> # PT = { D.2388 }
> # ALIGN = 16, MISALIGN = 0
> # vectp_jacobianTransposeds.9_47 = PHI <vectp_jacobianTransposeds.9_48(6),
> &jacobianTransposeds(5)>
> # ivtmp_50 = PHI <ivtmp_51(6), 0(5)>
> # RANGE [0, 2147483646] NONZERO 2147483647
> _1 = (long unsigned int) i_21;
> # RANGE [0, 34359738336] NONZERO 34359738352
> _2 = _1 * 16;
> # PT = null { D.2425 } (escaped, escaped heap)
> _3 = _10 + _2;
> _6 = _1 * 8;
> # PT = { D.2388 }
> # ALIGN = 8, MISALIGN = 0
> _4 = &jacobianTransposeds + _6;
> vect__5.7_42 = MEM[(double *)vectp.5_40];
> # PT = null { D.2425 } (escaped, escaped heap)
> # ALIGN = 8, MISALIGN = 0
> vectp.5_43 = vectp.5_40 + 16;
> vect__5.8_44 = MEM[(double *)vectp.5_43];
> vect_perm_even_45 = VEC_PERM_EXPR <vect__5.7_42, vect__5.8_44, { 0, 2 }>;
> vect_perm_odd_46 = VEC_PERM_EXPR <vect__5.7_42, vect__5.8_44, { 1, 3 }>;
> _5 = _3->_M_elems0;
> MEM[(double &)vectp_jacobianTransposeds.9_47] = vect_perm_even_45;
> # RANGE [1, 2147483647] NONZERO 2147483647
> i_16 = i_21 + 1;
> # PT = null { D.2425 } (escaped, escaped heap)
> vectp.5_41 = vectp.5_43 + 16;
> # PT = { D.2388 }
> # ALIGN = 16, MISALIGN = 0
> vectp_jacobianTransposeds.9_48 = vectp_jacobianTransposeds.9_47 + 16;
> ivtmp_51 = ivtmp_50 + 1;
> if (ivtmp_51 >= bnd.2_37)
> goto <bb 12>; [16.67%]
> else
> goto <bb 6>; [83.33%]
>
> <bb 9> [local count: 136902081]:
> goto <bb 3>; [100.00%]
>
> <bb 6> [local count: 616059372]:
> goto <bb 4>; [100.00%]
>
> <bb 12> [local count: 136902083]:
> niters_vector_mult_vf.3_38 = bnd.2_37 << 1;
> tmp.4_39 = (int) niters_vector_mult_vf.3_38;
>
> <bb 13> [local count: 912680552]:
> # RANGE [0, 2147483647] NONZERO 2147483647
> # i_24 = PHI <i_29(14), tmp.4_39(12)>
> # RANGE [0, 2147483646] NONZERO 2147483647
> _19 = (long unsigned int) i_24;
> # RANGE [0, 34359738336] NONZERO 34359738352
> _33 = _19 * 16;
> # PT = null { D.2425 } (escaped, escaped heap)
> _26 = _10 + _33;
> _27 = _19 * 8;
> # PT = { D.2388 }
> # ALIGN = 8, MISALIGN = 0
> _28 = &jacobianTransposeds + _27;
> _31 = _26->_M_elems0;
> MEM[(double &)_28] = _31;
> # RANGE [1, 2147483647] NONZERO 2147483647
> i_29 = i_24 + 1;
> if (n_14 <= i_29)
> goto <bb 9>; [15.00%]
> else
> goto <bb 14>; [85.00%]
>
> <bb 14> [local count: 775778470]:
> goto <bb 13>; [100.00%]
>
> This is no peeling guard condition skipping vector loop anymore. In case of
> "argc_13(D) == 1", the vector loop body is executed exactly once (corresponding
> 2 times before vectorization);
Hmm, I think it looks all a bit bogus - clearly the vector loop should
execute once for argc == 1 but we compute bnd.2_37 == 0 (argc*2 - 1 / 2).
That doesn't fit with the <= bnd.2_37 use for the exit condition. For
argc == 2 we'd compute bnd.2_37 == 1 and execute the body once as well...
> after vector loop, the epilog loop body is
> executed 2 times again (for the same iteration as done in vector loop). There
> is two problems here:
> A) it's at least inefficient when ("argc_13(D) == 1" && !SVE).
> B) Given the vector loop is not guarded by peeling condition anymore, range
> info as you noted should not be set for bnd.2_37, because it could take value
> ZERO.
But how does the exit condition make sense there?! If we're peeling
for gaps then we should not execute the loop. I guess we optimize
the condition immediately because of the bogus range info.
> Change in peeling is made by revision 256635, specifically, by below code
> changes:
>
> + poly_uint64 bound_epilog = 0;
> + if (!LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
> + && LOOP_VINFO_PEELING_FOR_NITER (loop_vinfo))
> + bound_epilog += vf - 1;
> + if (LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo))
> + bound_epilog += 1;
>
> //......
>
> @@ -2577,10 +2593,8 @@ vect_do_peeling (loop_vec_info loop_vinfo, tree niters,
> tree nitersm1,
> if (skip_vector)
> {
> /* Additional epilogue iteration is peeled if gap exists. */
> - bool peel_for_gaps = LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo);
> tree t = vect_gen_scalar_loop_niters (niters_prolog, prolog_peeling,
> - bound_prolog,
> - peel_for_gaps ? vf : vf - 1,
> + bound_prolog, bound_epilog,
>
> Now bound_epilog == 1 is passed into vect_gen_scalar_loop_niters, rather than
> vf (== 2), this causes no peeling condition is generated.
>
> Either below condition is too strict here or we need to identify and skip
> setting range info in this case:
> + if (!LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
> + && LOOP_VINFO_PEELING_FOR_NITER (loop_vinfo))
> + bound_epilog += vf - 1;
Thanks for the further analysis. The above allows us to blame Richard.
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Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch here:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01047.html
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Wed, 19 Sep 2018 10:49:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed hard to say w/o a testcase.
>From gcc-bugs-return-615690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 10:49:51 2018
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Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Wed, 19 Sep 2018 10:55:00 -0000
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--- Comment #4 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Do we also need to test m_test_pp_flags?
At least dump_context::emit_item does it.
>From gcc-bugs-return-615691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 10:55:52 2018
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Subject: [Bug c++/87324] g++ ICE with overriding initializers: Segmentation fault
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-19
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
Ever confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug fortran/87359] [9.0 regression] pointer being freed was not allocated
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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>From gcc-bugs-return-615693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 11:19:53 2018
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Subject: [Bug fortran/86576] [F03][OOP] Sourced allocation of object array fails with SEGFAULT
Date: Wed, 19 Sep 2018 11:28:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |janus at gcc dot gnu.org
--- Comment #2 from janus at gcc dot gnu.org ---
Here is a reduced test case:
program test
implicit none
type :: Otype
integer, allocatable :: og
end type
type(Otype), dimension(:), allocatable :: outarr
allocate( outarr, source = get_result() )
contains
function get_result( ) result( outarr )
class(Otype), dimension(:), allocatable :: outarr
type(Otype), dimension(1:1) :: oa
allocate( oa(1)%og )
allocate( outarr, source = oa )
end function
end
I see this segfault reliably with gfortran 8 and trunk. Versions 6 and 7 do not
show segfaults on my system, but I still see invalid reads with valgrind, so I
think they are affected as well.
I'll note to the OP that the time in which a fix can be found correlates with
the quality of the bug report. Reduction is something than can certainly done
by the user.
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Subject: [Bug middle-end/87363] New: Duplicate and bogus -Wstringop-overflow warning
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Bug ID: 87363
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Reporter: bernd.edlinger at hotmail dot de
Target Milestone: ---
as pointed out here: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00975.html
the following test program emits a duplicate warning, which is bogus, as
u.z is used, and not u.x:
$ cat gcc/testsuite/gcc.c-torture/execute/pr87053.c
/* PR middle-end/87053 */
const union
{ struct {
char x[4];
char y[4];
};
struct {
char z[8];
};
} u = {{"1234", "567"}};
int main ()
{
if (__builtin_strlen (u.z) != 7)
__builtin_abort ();
}
$ gcc gcc/testsuite/gcc.c-torture/execute/pr87053.c
gcc/testsuite/gcc.c-torture/execute/pr87053.c: In function ‘main’:
gcc/testsuite/gcc.c-torture/execute/pr87053.c:15:26: warning: ‘strlen’ argument
missing terminating nul [-Wstringop-overflow=]
15 | if (__builtin_strlen (u.z) != 7)
| ~^~
gcc/testsuite/gcc.c-torture/execute/pr87053.c:11:3: note: referenced argument
declared here
11 | } u = {{"1234", "567"}};
| ^
gcc/testsuite/gcc.c-torture/execute/pr87053.c:15:26: warning: ‘strlen’ argument
missing terminating nul [-Wstringop-overflow=]
15 | if (__builtin_strlen (u.z) != 7)
| ~^~
gcc/testsuite/gcc.c-torture/execute/pr87053.c:11:3: note: referenced argument
declared here
11 | } u = {{"1234", "567"}};
| ^
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Wed, 19 Sep 2018 11:45:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
For the record:
$ gdb --version
GNU gdb (GDB; openSUSE Tumbleweed) 8.2
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Wed, 19 Sep 2018 12:11:00 -0000
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
backtracing with GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
works for me, but it takes 20GB and 5 minutes to print a backtrace:
(gdb) bt
#0 0x00007ffff7bc915f in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#1 0x000055555556ea65 in mozilla::detail::ConditionVariableImpl::wait
(lock=..., this=0x7ffff6b57b18) at
/aux/hubicka/firefox-2018/gecko-new/mozglue/misc/Mutex_posix.cpp:199
#2
mozilla::detail::ConditionVariableImpl::wait_for(mozilla::detail::MutexImpl&,
mozilla::BaseTimeDuration<mozilla::TimeDurationValueCalculator> const&) ()
at
/aux/hubicka/firefox-2018/gecko-new/mozglue/misc/ConditionVariable_posix.cpp:127
#3 0x00007fffeac0acc9 in
mozilla::OffTheBooksCondVar::Wait(mozilla::BaseTimeDuration<mozilla::TimeDurationValueCalculator>)
(aDuration=..., this=0x7ffff6b57b10)
at /aux/hubicka/firefox2-2018-gcc8-O3-lto/dist/include/mozilla/CondVar.h:72
#4
mozilla::Monitor::Wait(mozilla::BaseTimeDuration<mozilla::TimeDurationValueCalculator>)
(aDuration=..., this=0x7ffff6b57ae8)
at /aux/hubicka/firefox2-2018-gcc8-O3-lto/dist/include/mozilla/Monitor.h:40
#5 TimerThread::Run() () at
/aux/hubicka/firefox-2018/gecko-new/xpcom/threads/TimerThread.cpp:549
#6 0x00007fffeac9986f in nsThread::ProcessNextEvent(bool, bool*) [clone
.part.512] () at
/aux/hubicka/firefox-2018/gecko-new/xpcom/threads/nsThread.cpp:1161
#7 0x00007fffe72762ac in NS_ProcessNextEvent(nsIThread*, bool) [clone
.constprop.30360] (aThread=<optimized out>, aMayWait=true)
at /aux/hubicka/firefox-2018/gecko-new/xpcom/threads/nsThreadUtils.cpp:519
#8 0x00007fffea65426d in
mozilla::ipc::MessagePumpForNonMainThreads::Run(base::MessagePump::Delegate*)
() at /aux/hubicka/firefox-2018/gecko-new/ipc/glue/MessagePump.cpp:364
#9 0x00007fffea64d077 in MessageLoop::RunInternal (this=<optimized out>) at
/aux/hubicka/firefox-2018/gecko-new/ipc/chromium/src/base/message_loop.cc:591
#10 MessageLoop::RunHandler (this=<optimized out>) at
/aux/hubicka/firefox-2018/gecko-new/ipc/chromium/src/base/message_loop.cc:318
#11 MessageLoop::Run (this=<optimized out>) at
/aux/hubicka/firefox-2018/gecko-new/ipc/chromium/src/base/message_loop.cc:298
#12 0x00007fffeac84bdc in nsThread::ThreadFunc(void*) () at
/aux/hubicka/firefox-2018/gecko-new/xpcom/threads/nsThread.cpp:464
#13 0x00007ffff7facfed in _pt_root (arg=0x7ffff6b5b940) at
/aux/hubicka/firefox-2018/gecko-new/nsprpub/pr/src/pthreads/ptthread.c:201
#14 0x00007ffff7bc3494 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#15 0x00007ffff6e64acf in clone () from /lib/x86_64-linux-gnu/libc.so.6
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Wed, 19 Sep 2018 12:32:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Before I see the assert, gdb consumes ~8GB of memory and it takes about 1
minute before the assert is triggered.
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
Date: Wed, 19 Sep 2018 12:42:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Hi Eric,
Ugh, I'm very sorry. I still think that patch is correct, but I didn't
intend to commit it. Thanks for catching it.
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Ugh, I'm very sorry. I still think that patch is correct, but I didn't
> intend to commit it. Thanks for catching it.
No problem. I don't disagree with the correctness but it will bring back a lot
of redundant zero-extensions on RISC architectures, as demonstrated here.
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #29 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #28)
> Created attachment 44724 [details]
> patch for the SSA propagator issue
>
> Using an sbitmap helps. I am testing the attached.
Note there's
void
ssa_propagation_engine::process_ssa_edge_worklist (void)
{
/* Process the next entry from the worklist. */
unsigned stmt_uid = bitmap_first_set_bit (ssa_edge_worklist);
which will then be a O(n) operation. Likewise the bitmap_empty_p test
isn't efficient (can be avoided by re-using the above walk).
For this particular testcase we only
end up here 1494 times (compared to many more bitmap_set_bit operations).
Still this makes using a sbitmap not the best idea. A sparse-set fits a bit
better but we want to iterate over the set in UID order as well which
the sparse-set doesn't allow - it only does choose_one in O(1) which might
not be the optimal propagation order (but eventually this detail isn't
too important...?). Iff only our sparse bitmap implementation would
be O(log N) in bit finding...
Note all of the same issues in theory apply to the CFG BB worklist.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Summary|[9.0 regression] pointer |[9 regression] pointer
|being freed was not |being freed was not
|allocated |allocated
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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is obsolete| |
--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44726
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44726&action=edit
patch for the SSA propagator issue
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Subject: [Bug tree-optimization/87360] [8/9 Regression] ICE in remove_redundant_iv_tests at gcc/tree-ssa-loop-ivcanon.c:571 since r255467
Date: Wed, 19 Sep 2018 13:27:00 -0000
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>From gcc-bugs-return-615704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:27:32 2018
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From: "kamleshbhalui at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/67449] Branch elimination problem on x86
Date: Wed, 19 Sep 2018 13:36:00 -0000
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Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:
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--- Comment #2 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
I have compiled the given test case with gcc for x86-64 linux.
And it works fine with the trunk and even specified version.
>From gcc-bugs-return-615706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:43:06 2018
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Subject: [Bug target/87288] [8/9 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Wed, 19 Sep 2018 13:43:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Mine then.
>From gcc-bugs-return-615705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:36:49 2018
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From: "wjwray at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87364] New: Pretty print of enumerator never prints the id, always falls back to C-style cast output
Date: Wed, 19 Sep 2018 13:43:00 -0000
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Bug ID: 87364
Summary: Pretty print of enumerator never prints the id, always
falls back to C-style cast output
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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In c-pretty-print.c
c_pretty_printer::constant calls pp_c_enumeration_constant
/******************** pp_c_enumeration_constant ****************/
/* Attempt to print out an ENUMERATOR. Return true on success.
Else return false; that means the value was obtained by a cast,
in which case print out the type-id part of the cast-expression
-- the casted value is then printed by pp_c_integer_literal. */
static bool
pp_c_enumeration_constant (c_pretty_printer *pp, tree e)
{
bool value_is_named = true;
tree type = TREE_TYPE (e);
tree value;
/* Find the name of this constant. */
for (value = TYPE_VALUES (type);
value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e);
value = TREE_CHAIN (value))
;
if (value != NULL_TREE)
pp->id_expression (TREE_PURPOSE (value));
else
{
/* Value must have been cast. */
pp_c_type_cast (pp, type);
value_is_named = false;
}
return value_is_named;
}
/***************************************************************/
The code iterates over the enumerators, comparing with the given e,
prints the id if found else falls back to print the C-style cast.
However, the comparison always fails so it always prints the cast
(after iterating over all the enumerators) and never the id.
The comparison in the enumeration loop can be fixed by adding DECL_INITIAL
to 'unwrap' the enumerator's value so it compares correctly as INTEGER_CST,
terminating the loop and pretty-printing the id instead of the C-style cast.
/* Find the name of this constant. */
for (value = TYPE_VALUES (type);
value != NULL_TREE
&& !tree_int_cst_equal (DECL_INITIAL( TREE_VALUE(value)), e);
^^^^^^^^^^^^^ ^
value = TREE_CHAIN (value))
;
With this patch, the loop exits early when it finds an enumerator of the
given value and prints the found-enumerator's id via:
if (value != NULL_TREE)
pp->id_expression (TREE_PURPOSE (value));
However, this one-line fix is not sufficient.
This code is located in c-pretty-print.c and has not been updated
to deal with C++11 scoped enums (pp->id_expression does not print
nested name specifiers as pp_cxx_nested_name_specifier does).
It is not obvious how best to split between c and cxx pretty-print.
I can provide test cases, based on __PRETTY_FUNCTION__ output.
I can also attempt a patch and tests, with some assistance.
The bug also turns up in compiler error message output.
See this Compiler Explorer example https://godbolt.org/z/1df0Sk
enum e { a, b, c=0 };
template <auto> struct wauto; // deliberately incomplete to trigger..
wauto<a> v; // error: aggregate 'wauto<(e)0> v' has incomplete type..
The error output should print 'a' in place of '(e)0'
(Clang prints 'wauto<a>', MSVC prints 'wauto<0>' - no type info.)
The docs need a fix for this exact same issue.
The GCC Internals doc is inconsistent on enumerator value.
GCC Internals https://gcc.gnu.org/onlinedocs/gccint.pdf
Chapter 11 GENERIC 11.3 Types (p 158 of current pdf):
ENUMERAL_TYPE
Used to represent an enumeration type
... the TREE_VALUE will be an INTEGER_CST giving the value
assigned to that constant...
*This is incorrect - TREE_VALUE is not an INTEGER_CST -
this leads to the bug in pp_c_enumeration_constant.*
Chapter 11 GENERIC 11.4 Declarations (p 161)
CONST_DECL
These nodes are used to represent enumeration constants.
The value of the constant is given by DECL_INITIAL which
will be an INTEGER_CST with the same type as the TREE_TYPE
of the CONST_DECL, i.e., an ENUMERAL_TYPE.
*This is correct - DECL_INITIAL is needed to get the value*
My guess is that DECL_INITIAL was introduced at some point
but not all the code and docs were updated for the change
(I'd be interested to know if this was indeed the case).
A closing thought:
The pretty-printing code will need an overhaul for C++20 with
the proposed changes for generalised non-type template args.
>From gcc-bugs-return-615707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:43:48 2018
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Subject: [Bug target/87196] ICE in vectorizable_load, at tree-vect-stmts.c:8043
Date: Wed, 19 Sep 2018 13:44:00 -0000
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>From gcc-bugs-return-615708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:44:52 2018
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Wed, 19 Sep 2018 13:58:00 -0000
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>From gcc-bugs-return-615709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 13:58:46 2018
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
Date: Wed, 19 Sep 2018 14:01:00 -0000
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I think nonzero_bits should use SUBREG_PROMOTED_VAR_P and
SUBREG_PROMOTED_UNSIGNED_P for REGs, not LOAD_EXTEND_OP, which is
only for MEMs.
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Subject: [Bug c/87365] New: Uninitiliazed variable detection
Date: Wed, 19 Sep 2018 14:29:00 -0000
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Bug ID: 87365
Summary: Uninitiliazed variable detection
Product: gcc
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The following snippet does not detect the unitilialized variable
<pre>
int foo(volatile int cond) {
int a;
if (cond){
a = 0;
} else {
while (cond) {
a++;
}
}
return a;
}
</pre>
>From gcc-bugs-return-615712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 14:47:44 2018
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Subject: [Bug target/87196] ICE in vectorizable_load, at tree-vect-stmts.c:8043
Date: Wed, 19 Sep 2018 14:47:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Dup of PR86877. Epilogue loop vectorisation sensibly avoids
peeling or versioning for alignment, but thus also skips the
checks for whether accesses are suitably aligned.
*** This bug has been marked as a duplicate of bug 86877 ***
>From gcc-bugs-return-615711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 14:29:02 2018
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Subject: [Bug c/87365] Uninitiliazed variable detection
Date: Wed, 19 Sep 2018 14:47:00 -0000
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--- Comment #1 from gcc at cookiesoft dot de ---
The volatile doesn't Change anything. I guess the combination of if and
Else-while confuses him
>From gcc-bugs-return-615713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 14:47:45 2018
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Wed, 19 Sep 2018 15:27:00 -0000
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--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
*** Bug 87196 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 15:27:30 2018
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Subject: [Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning
Date: Wed, 19 Sep 2018 16:28:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-19
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The warning code tries to avoid duplicate warning by checking and setting
TREE_NO_WARNING. But because it doesn't have access to the tree node
representing the strlen(arg) call it uses TREE_NO_WARNING(arg). When the arg
tree node changes for the same strlen(arg) call duplicate warnings aren't
suppressed.
Other than that, since
When a value is stored in a member of an object of union type, the bytes of
the object representation that do not correspond to that member but do
correspond to other members take unspecified values.
the value of u.z is unspecified after the initialization of the union u in the
test case.
In strlen(u.z) the warning actually considers the value of u.x returned by
string_constant(). This is because the function determines the initializer of
an aggregate subobject by calling get_addr_base_and_unit_offset(), i.e., based
on the subobject's offset. For the union in the test case, the offset of u.x
is the same as u.z (there is no initializer for u.z and so the values of some
of its bytes are unspecified).
To avoid the warning, string_constant() could be enhanced to detect this case
(i.e., referencing a union member) and give up. Or, we could consider the
warning a useful reminder for people to avoid relying on unspecified behavior.
Or we could add a different warning to help point out this sort of buggy code.
To determine the number of non-nul bytes in aggregate object that includes
multiple members, use memchr(&u, 0, sizeof u) instead of abusing strlen.
>From gcc-bugs-return-615715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 16:28:40 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Wed, 19 Sep 2018 16:31:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
After generating a lot of module files with -fsyntax-only
so make succeeds, and then running "make check" on the
reproducer, I get
|=============================================================================|
| WHIZARD 2.6.5
|=============================================================================|
| ============================================================================
| Running self-test: resonances
| ----------------------------------------------------------------------------
******************************************************************************
******************************************************************************
*** FATAL ERROR: Self-test 'resonances' not implemented.
******************************************************************************
******************************************************************************
WHIZARD run aborted.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Wed, 19 Sep 2018 16:36:00 -0000
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--- Comment #5 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Thomas Koenig from comment #4)
> After generating a lot of module files with -fsyntax-only
> so make succeeds, and then running "make check" on the
> reproducer, I get
**********************
> *
> *** FATAL ERROR: Self-test 'resonances' not implemented.
Wait, you are talking about the tarball (attachment)? After make, please do
./whizard_test --check event_transforms
Still in the procedure of reducing the issue, I already decoupled 10-12
modules.
>From gcc-bugs-return-615717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 16:36:34 2018
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Subject: [Bug fortran/25829] [F03] Asynchronous IO support
Date: Wed, 19 Sep 2018 16:36:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #56 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I think we can close this one.
The armeb regression is tracked in PR87048.
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Subject: [Bug fortran/20585] [meta-bug] Fortran 2003 support
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Bug 20585 depends on bug 25829, which changed state.
Bug 25829 Summary: [F03] Asynchronous IO support
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25829
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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From: "nightstrike at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86941] ICE in i386/winnt.c:1258 in i386_pe_seh_unwind_emit
Date: Wed, 19 Sep 2018 17:01:00 -0000
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nightstrike <nightstrike at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from nightstrike <nightstrike at gmail dot com> ---
This started working again sometime between the report date and today, though I
do not know what change specifically fixed the problem.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87357] Bogus conversion with conversion function not detected
Date: Wed, 19 Sep 2018 17:03:00 -0000
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Sep 19 16:59:51 2018
New Revision: 264425
URL: https://gcc.gnu.org/viewcvs?rev=264425&root=gcc&view=rev
Log:
PR c++/87357 - missing -Wconversion warning
* decl.c (grok_op_properties): Remove diagnostic parts mentioning
a conversion to a reference to void. Use
same_type_ignoring_top_level_qualifiers_p rather than comparing types
directly.
* g++.dg/warn/Wconversion5.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wconversion5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/59480] Missing error diagnostic: friend declaration specifying a default argument must be a definition
Date: Wed, 19 Sep 2018 17:11:00 -0000
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rafael.espindola at ic dot unicamp
| |.br
--- Comment #23 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
*** Bug 13166 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/87357] Bogus conversion with conversion function not detected
Date: Wed, 19 Sep 2018 17:11:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/13166] [DR136] not implemented
Date: Wed, 19 Sep 2018 17:11:00 -0000
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
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--- Comment #9 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Fixed by Paolo's patches for PR59480.
*** This bug has been marked as a duplicate of bug 59480 ***
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Subject: [Bug c++/65608] [meta-bug] friend issues
Date: Wed, 19 Sep 2018 17:20:00 -0000
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Bug 65608 depends on bug 13166, which changed state.
Bug 13166 Summary: [DR136] not implemented
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=13166
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Subject: [Bug c++/87366] New: SFINAE trait as template parameter causes incorrect application of trait to other areas
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Bug ID: 87366
Summary: SFINAE trait as template parameter causes incorrect
application of trait to other areas
Product: gcc
Version: 8.2.0
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Created attachment 44727
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44727&action=edit
Compiler output when trying to compile the complete code snippet
This code should be accepted (and both clang and msvc accept it according to
godbolt), but gcc does not, on every version that I tested (7, 8, and trunk):
namespace std {
template <typename T, typename U> struct is_same {static constexpr bool
value = false;};
template <typename T> struct is_same<T, T> {static constexpr bool value =
true;};
template <bool, typename T = void> struct enable_if {};
template <typename T> struct enable_if<true, T> {using type = T;};
template <typename T, typename U> constexpr bool is_same_v = is_same<T,
U>::value;
template <bool B, typename T = void> using enable_if_t = typename
enable_if<B, T>::type;
}
struct A {};
struct B {};
template <typename T> struct wrapper {};
template <typename T, typename = std::enable_if_t<std::is_same_v<T, A>>> using
ok_t = T;
template <typename T> void not_even_called(wrapper<const ok_t<T>&> a);
template <typename T> int called(wrapper<const T&> a);
void test(wrapper<const B&>& val)
{
called(val);
}
GCC fails to compile with the following error message:
test.cpp: In function ‘void test(wrapper<const B&>&)’:
test.cpp:23:15: error: no matching function for call to ‘called(wrapper<const
B&>&)’
called(val);
^
test.cpp:19:27: note: candidate: ‘template<class T> int
called(wrapper<ok_t<T>&>)’
template <typename T> int called(wrapper<const T&> a);
^~~~~~
test.cpp:19:27: note: template argument deduction/substitution failed:
test.cpp: In substitution of ‘template<class T> int called(wrapper<ok_t<T>&>)
[with T = B]’:
test.cpp:23:15: required from here
test.cpp:19:27: error: no type named ‘type’ in ‘struct std::enable_if<false,
void>’
As you can see, the SFINAE trait ok_t from not_even_called got applied to the
parameter in called. Removing not_even_called makes the code compile, and
swapping the declaration of called and not_even_called makes the code compile
(and then you can even call not_even_called with a wrapper<const B&>, which
should fail). Removing the wrapper makes it compile, and moving the enable_if
directly into the wrapper makes it compile as well. In addition, making ok_t
work for struct B instead of struct A makes it compile.
I'm guessing what is happening is that for some reason gcc thinks that
wrapper<ok_t<T>> is the same as wrapper<T> and starts applying whatever it saw
to the first occurrence to all future occurrences of the type.
I have attached the compiler output when run with -v trying to compile the code
I posted above.
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning
Date: Wed, 19 Sep 2018 17:38:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Wed, 19 Sep 2018, msebor at gcc dot gnu.org wrote:
> Other than that, since
>
> When a value is stored in a member of an object of union type, the bytes of
> the object representation that do not correspond to that member but do
> correspond to other members take unspecified values.
>
> the value of u.z is unspecified after the initialization of the union u in the
> test case.
No, that's only about those bytes that are outside the member that was
stored (so if you have a union between int and double, and store in the
int, the parts of the double after the initial sizeof (int) bytes become
undefined, for example). Type-punning between union members (when you
explicitly access using the union type), up to the lesser of the sizes of
the two members in question, has been defined since C99 TC3 (in a
footnote, so not normative, but the intent is clear).
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Subject: [Bug rtl-optimization/86902] [9 Regression] ICE: in as_a, at machmode.h:356 at -O
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Sep 19 17:38:11 2018
New Revision: 264426
URL: https://gcc.gnu.org/viewcvs?rev=264426&root=gcc&view=rev
Log:
combine: Use correct mode in new comparison (PR86902)
This code in try_combine uses the wrong mode. This fails (with RTL
checking) in trunk, but not in any released branches.
PR rtl-optimization/86902
* combine.c (try_combine): When changing the CC mode used, don't change
an unrelated mode in other_insn to that new CC mode.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
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Subject: [Bug rtl-optimization/86902] [9 Regression] ICE: in as_a, at machmode.h:356 at -O
Date: Wed, 19 Sep 2018 17:43:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/68429] [concepts] ICE in in placeholder_extract_concept_and_args, at cp/constraint.cc:1401
Date: Wed, 19 Sep 2018 17:44:00 -0000
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paolo.carlini at oracle dot com
--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
This seems to be fixed on trunk.
Paolo, one of your recent concept patches might be responsible for this (maybe
the one for PR85065). Could you confirm this? Do we want to add another
testcase for this?
>From gcc-bugs-return-615730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 17:44:29 2018
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Subject: [Bug c++/68429] [concepts] ICE in in placeholder_extract_concept_and_args, at cp/constraint.cc:1401
Date: Wed, 19 Sep 2018 17:46:00 -0000
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--- Comment #3 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Btw, the code snippet from comment #1 is accepted on trunk.
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Subject: [Bug fortran/84109] ICE in adjustl on allocatable array of strings
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Wed Sep 19 17:44:36 2018
New Revision: 264427
URL: https://gcc.gnu.org/viewcvs?rev=264427&root=gcc&view=rev
Log:
2018-09-19 Paul Thomas <pault@gcc.gnu.org>
PR fortran/84109
* trans-expr.c (gfc_trans_assignment_1): The rse.pre for the
assignment of deferred character intrinsic elemental function
results to a realocatable lhs must not be added to the exterior
block if they are array valued but must go to the loop body.
2018-09-19 Paul Thomas <pault@gcc.gnu.org>
PR fortran/84109
* gfortran.dg/elemental_function_3.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/elemental_function_3.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Wed, 19 Sep 2018 18:27:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
@Tom: I've got built openSUSE RPM package here:
https://build.opensuse.org/package/show/home:marxin:branches:mozilla:Factory/MozillaFirefox
One can install MozillaFirefox MozillaFirefox-debuginfo
MozillaFirefox-debugsource package and run:
$ gdb /usr/lib64/firefox/firefox
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Wed, 19 Sep 2018 18:42:00 -0000
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #5)
> (In reply to Thomas Koenig from comment #4)
> > After generating a lot of module files with -fsyntax-only
> > so make succeeds, and then running "make check" on the
> > reproducer, I get
> **********************
> > *
> > *** FATAL ERROR: Self-test 'resonances' not implemented.
>
>
> Wait, you are talking about the tarball (attachment)? After make, please do
> ./whizard_test --check event_transforms
> Still in the procedure of reducing the issue, I already decoupled 10-12
> modules.
Hi Juergen,
Reducing this would make life a heck of a sight easier! Thanks :-) As it
happens, I have been somewhat active in the last few weeks and a clue, at
least, as to where the problem starts would be good.
Cheers
Paul
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Subject: [Bug rtl-optimization/87361] [9 regression] gcc.target/sparc/20161111-1.c FAILs
Date: Wed, 19 Sep 2018 18:44:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I think nonzero_bits should use SUBREG_PROMOTED_VAR_P and
> SUBREG_PROMOTED_UNSIGNED_P for REGs, not LOAD_EXTEND_OP, which is
> only for MEMs.
I don't see how SUBREG_PROMOTED_VAR_P/SUBREG_PROMOTED_UNSIGNED_P will fit in
the picture here, it's limited to RTL expansion. Ideally the REE pass should
deal with that instead, but it doesn't know anything about implicit extensions.
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--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Well, I can confirm this. Output from valgrind shows as the first error:
Running test: event_transforms_1| Process library 'event_transforms_1_lib':
initialized
==23957== Invalid read of size 8
==23957== at 0xB22334:
__mci_midpoint_MOD___final_mci_midpoint_Mci_midpoint_t (mci_midpoint.f90:475)
==23957== by 0xA57C34: __process_mci_MOD_process_mci_entry_init
(process_mci.f90:187)
==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
(event_transforms_uti.f90:85)
==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
(event_transforms_ut.f90:45)
==23957== by 0xB51801: whizard_check.3816 (in
/home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
==23957== Address 0x61375a0 is 16 bytes inside a block of size 480 free'd
==23957== at 0x4C2B28A: free (vg_replace_malloc.c:530)
==23957== by 0xA57C03: __process_mci_MOD_process_mci_entry_init
(process_mci.f90:187)
==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
(event_transforms_uti.f90:85)
==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
(event_transforms_ut.f90:45)
==23957== by 0xB51801: whizard_check.3816 (in
/home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
==23957== Block was alloc'd at
==23957== at 0x4C2A0DD: malloc (vg_replace_malloc.c:299)
==23957== by 0xA4539B:
__process_config_MOD_process_component_extract_mci_template
(process_config.f90:834)
==23957== by 0xA579D2: __process_mci_MOD_process_mci_entry_init
(process_mci.f90:187)
==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
(event_transforms_uti.f90:85)
==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
(event_transforms_ut.f90:45)
==23957== by 0xB51801: whizard_check.3816 (in
/home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
So, it is a finalizer problem. The allocate statement was at
function process_component_extract_mci_template (component) &
result (mci_template)
class(mci_t), allocatable :: mci_template
class(process_component_t), intent(in) :: component
if (allocated (component%mci_template)) &
allocate (mci_template, source = component%mci_template)
end function process_component_extract_mci_template
Hopefully, this can narrow things down a bit.
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 44728
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44728&action=edit
Makefile for the shortened reproducer
Hi,
if you want to compile the reproducer, you can use this Makefile,
it should have all the dependencies right (so rm *.o ; make -j8 make
can work).
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Subject: [Bug c++/87324] g++ ICE with overriding initializers: Segmentation fault
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed Sep 19 19:35:19 2018
New Revision: 264428
URL: https://gcc.gnu.org/viewcvs?rev=264428&root=gcc&view=rev
Log:
/cp
2018-09-19 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/87324
* parser.c (cp_parser_initializer_list): Assign error_mark_node
to the index upon error.
/testsuite
2018-09-19 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/87324
* g++.dg/cpp0x/desig5.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/desig5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87324] g++ ICE with overriding initializers: Segmentation fault
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Assignee|paolo.carlini at oracle dot com |unassigned at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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Subject: [Bug c/87365] Uninitiliazed variable detection
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Duplicated
*** This bug has been marked as a duplicate of bug 18501 ***
>From gcc-bugs-return-615740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 20:26:03 2018
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Subject: [Bug tree-optimization/18501] [6/7/8/9 Regression] Missing 'used uninitialized' warning (CCP)
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gcc at cookiesoft dot de
--- Comment #86 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 87365 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 20:43:51 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Wed, 19 Sep 2018 21:00:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-19
Known to work| |8.2.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAICT the change occurred between revisions r263787 (2018-08-22, OK) and
r263994 (2018-08-30, wrong code).
>From gcc-bugs-return-615742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 19 21:01:02 2018
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Subject: [Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
If u's initialization is viewed as a single assignment then you're right. If
the initialization of u is viewed as two separate assignments:
u.x = "1234";
u.y = "567";
then strictly speaking, after the second of the two, the first four bytes of
u.z have an unspecified value (even though u.x must remain unchanged). In
either case, if the size of the two union members isn't the same the result of
accessing the the larger one is unquestionably unspecified. In C++, the access
is undefined regardless of their size.
As with many test cases contrived to find compiler bugs by exploiting the dark
corners of the language, the answer depends on one's interpretation, and the
solution (warn or not, and what to say in the warning) on how likely fragile
code like this is a useful idiom rather than a coding mistake hiding a bug.
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning
Date: Thu, 20 Sep 2018 01:03:00 -0000
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--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I think the *member* of the union here (the one that is active after the
initialization) is the anonymous struct containing x and y. That would
surely be the case if you named the two struct members (does that make any
difference to how GCC behaves on this testcase?), and I believe anonymous
structs and unions purely provide a convenient syntax for accessing nested
members, without changing other semantics from what they would be if there
were names given to the members at every level and fully-qualified names
were used for all member accesses.
>From gcc-bugs-return-615744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 01:03:20 2018
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Subject: [Bug libstdc++/67843] experimental/filesystem/iterators/directory_iterator.cc fails on armv5t
Date: Thu, 20 Sep 2018 01:16:00 -0000
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Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hp at gcc dot gnu.org
--- Comment #9 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(I finally found it - I must have written down the wrong number at the BoF!)
A sidenote: this is the "main" PR behind the ARM-libcstdc++-atomics BoF at the
recent GNU Tools Cauldron in Manchester:
<https://gcc.gnu.org/wiki/cauldron2018#Consistent_use_of_atomics_in_libstdc.2B-.2B-_across_ARM_targets>,
where IIRC there was consensus. I don't see it communicated neither on the
lists nor here, so I'll give it a try:
As I recall it, the level of atomics support affecting the ABI is to be fixed
to the lowest denominator reached with the default configuration, and gcc will
be changed to emit the builtin preprocessor atomicity macros to match. This
would be the new default, overridable by configure-options to the effect of the
current behavior (and maybe compile-time gcc-options as well). A broken
combination will yield (link-time) warnings.
This requires gcc as well as top-level configure changes.
>From gcc-bugs-return-615745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 01:16:36 2018
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Subject: [Bug c++/77540] Confusing diagnostics due to stray comma in ctor-init-list
Date: Thu, 20 Sep 2018 05:54:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-615746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 05:54:57 2018
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Thu, 20 Sep 2018 06:22:00 -0000
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--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #7)
> Well, I can confirm this. Output from valgrind shows as the first error:
>
> Running test: event_transforms_1| Process library 'event_transforms_1_lib':
> initialized
> ==23957== Invalid read of size 8
> ==23957== at 0xB22334:
> __mci_midpoint_MOD___final_mci_midpoint_Mci_midpoint_t (mci_midpoint.f90:475)
> ==23957== by 0xA57C34: __process_mci_MOD_process_mci_entry_init
> (process_mci.f90:187)
> ==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
> ==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
> (event_transforms_uti.f90:85)
> ==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
> ==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
> (event_transforms_ut.f90:45)
> ==23957== by 0xB51801: whizard_check.3816 (in
> /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== Address 0x61375a0 is 16 bytes inside a block of size 480 free'd
> ==23957== at 0x4C2B28A: free (vg_replace_malloc.c:530)
> ==23957== by 0xA57C03: __process_mci_MOD_process_mci_entry_init
> (process_mci.f90:187)
> ==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
> ==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
> (event_transforms_uti.f90:85)
> ==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
> ==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
> (event_transforms_ut.f90:45)
> ==23957== by 0xB51801: whizard_check.3816 (in
> /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== Block was alloc'd at
> ==23957== at 0x4C2A0DD: malloc (vg_replace_malloc.c:299)
> ==23957== by 0xA4539B:
> __process_config_MOD_process_component_extract_mci_template
> (process_config.f90:834)
> ==23957== by 0xA579D2: __process_mci_MOD_process_mci_entry_init
> (process_mci.f90:187)
> ==23957== by 0xA8E78B: __process_MOD_process_setup_mci (process.f90:1150)
> ==23957== by 0xB30828: __event_transforms_uti_MOD_event_transforms_1
> (event_transforms_uti.f90:85)
> ==23957== by 0x422BB9: __unit_tests_MOD_test (unit_tests.f90:175)
> ==23957== by 0xB4FF46: __event_transforms_ut_MOD_event_transforms_test
> (event_transforms_ut.f90:45)
> ==23957== by 0xB51801: whizard_check.3816 (in
> /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB53255: MAIN__ (in /home/ig25/Downloads/Whiz/whizard_test)
> ==23957== by 0xB535A9: main (in /home/ig25/Downloads/Whiz/whizard_test)
>
> So, it is a finalizer problem. The allocate statement was at
>
> function process_component_extract_mci_template (component) &
> result (mci_template)
> class(mci_t), allocatable :: mci_template
> class(process_component_t), intent(in) :: component
> if (allocated (component%mci_template)) &
> allocate (mci_template, source = component%mci_template)
> end function process_component_extract_mci_template
>
> Hopefully, this can narrow things down a bit.
If this a finalizer problem, try reverting r263916.
I am not in a position to work on this right now, except to revert the above
revision on trunk. Please let me know if this does indeed fix your proble.
Cheers
Paul
>From gcc-bugs-return-615747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 06:22:16 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning
Date: Thu, 20 Sep 2018 08:07:00 -0000
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--- Comment #5 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Using named struct members does not make a difference.
Of course it is possible that converting address of u.b.z
to const char *, makes the example undefined, as strlen is
not really accessing the bytes thru a union member.
$ cat pr87053.c
/* PR middle-end/87053 */
const union
{ struct {
char x[4];
char y[4];
} a;
struct {
char z[8];
} b;
} u = {{"1234", "567"}};
int main ()
{
if (__builtin_strlen (u.b.z) != 7)
__builtin_abort ();
}
$ gcc pr87053.c
gcc -O3 -S pr87053.c
pr87053.c: In function ‘main’:
pr87053.c:15:28: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
15 | if (__builtin_strlen (u.b.z) != 7)
| ~~~^~
pr87053.c:11:3: note: referenced argument declared here
11 | } u = {{"1234", "567"}};
| ^
pr87053.c:15:28: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
15 | if (__builtin_strlen (u.b.z) != 7)
| ~~~^~
pr87053.c:11:3: note: referenced argument declared here
11 | } u = {{"1234", "567"}};
| ^
>From gcc-bugs-return-615748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 08:07:27 2018
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Subject: [Bug c/87367] New: GCC gives false warning on -Wnull-dereference when using -O2
Date: Thu, 20 Sep 2018 08:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87367
Bug ID: 87367
Summary: GCC gives false warning on -Wnull-dereference when
using -O2
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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Target Milestone: ---
When compiling the following program with -Wnull-dereference, GCC doesn't warn
when using -O1, but warns when using -O2.
#include <stdlib.h>
typedef struct list_element_s {
void *data;
struct list_element_s *next;
} list_element_s, list_element_p[1];
list_element_s *list_new() {
list_element_s *n = malloc(sizeof(list_element_s));
if (!n) {
return NULL;
}
n->data = NULL;
n->next = NULL;
return n;
}
size_t otrng_list_len(list_element_s *head) {
list_element_s *cursor = head;
size_t size = 0;
while (cursor) {
if (cursor->data) {
size++;
}
cursor = cursor->next;
}
return size;
}
list_element_s *otrng_list_copy(list_element_s *head) {
if (otrng_list_len(head) == 0) {
return NULL;
}
list_element_s *cursor = head;
list_element_s *copy = list_new();
if (!copy) {
return NULL;
}
copy->data = cursor->data;
copy->next = NULL;
list_element_s *ret = copy;
cursor = cursor->next;
while (cursor) {
copy->next = list_new();
copy = copy->next;
copy->data = cursor->data;
copy->next = NULL;
cursor = cursor->next;
}
return ret;
}
$ gcc -c -O2 -Wnull-dereference list.c
list.c: In function 'otrng_list_copy':
list.c:54:16: warning: potential null pointer dereference [-Wnull-dereference]
copy->next = NULL;
^
list.c:53:16: warning: potential null pointer dereference [-Wnull-dereference]
copy->data = cursor->data;
~~~~~~~~~~~^~~~~~~~~~~~~~
>From gcc-bugs-return-615749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 08:11:35 2018
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Subject: [Bug c/87367] GCC gives false warning on -Wnull-dereference when using -O2
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Iru Cai <mytbk920423 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Iru Cai <mytbk920423 at gmail dot com> ---
Looks like it's not a bug, the warning of NULL dereference is right.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This is indeed caused by r263916.
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Subject: [Bug c/87367] GCC gives false warning on -Wnull-dereference when using -O2
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
copy->next = list_new();
You dont check the return value here.
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Thu, 20 Sep 2018 08:32:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So I tried debugging using LTO bootstrapped cc1. profiling gdb for a simple
gdb ./cc1
(gdb) b do_rpo_vn
(gdb) q
yields
Samples: 2K of event 'instructions', Event count (approx.): 45695722362
Overhead Command Shared Object Symbol
8.32% gdb gdb [.] read_attribute_value
5.78% gdb gdb [.] dwarf2_attr
5.10% gdb gdb [.] load_partial_dies
4.23% gdb gdb [.] cp_find_first_component_aux
4.10% gdb gdb [.] partial_die_info::read
3.55% gdb gdb [.] htab_find_slot_with_hash
3.11% gdb gdb [.] get_objfile_arch
2.98% gdb gdb [.] peek_die_abbrev
2.88% gdb gdb [.] cp_canonicalize_string
or with a callgraph
Samples: 1K of event 'instructions', Event count (approx.): 37206022209
Children Self Command Shared Object Symbol
â—†
+ 91.92% 0.00% gdb gdb [.] gdb_main
â–’
+ 91.47% 0.00% gdb gdb [.] main
â–’
+ 91.42% 0.00% gdb libc-2.22.so [.] __libc_start_main
â–’
+ 91.35% 0.00% gdb gdb [.] catch_command_errors
â–’
+ 91.30% 0.00% gdb gdb [.] _start
â–’
+ 85.40% 0.00% gdb gdb [.]
symbol_file_add_main_adâ–’
+ 85.40% 0.00% gdb gdb [.] symbol_file_add_main
â–’
+ 55.17% 0.00% gdb gdb [.] psym_lookup_symbol
â–’
+ 55.13% 0.00% gdb gdb [.] psymtab_to_symtab
â–’
+ 55.13% 0.00% gdb gdb [.] dwarf2_read_symtab
â–’
+ 55.13% 0.00% gdb gdb [.]
dw2_do_instantiate_symtâ–’
+ 55.06% 0.00% gdb gdb [.]
lookup_symbol_in_objfilâ–’
+ 55.02% 0.00% gdb gdb [.] lookup_global_symbol
â–’
+ 55.02% 0.00% gdb gdb [.]
default_iterate_over_obâ–’
+ 55.02% 0.00% gdb gdb [.]
lookup_symbol_global_itâ–’
+ 55.00% 0.00% gdb gdb [.] lookup_symbol_aux
â–’
+ 54.99% 0.00% gdb gdb [.]
basic_lookup_symbol_nonâ–’
+ 54.94% 0.00% gdb gdb [.]
lookup_symbol_in_languaâ–’
+ 54.83% 0.00% gdb gdb [.] lookup_symbol
â–’
+ 54.77% 0.00% gdb gdb [.] set_initial_language
â–’
+ 43.75% 0.49% gdb gdb [.] process_die
but that doesn't look too useful.
Note that startup / breakpointing isn't as fast as non-LTOed cc1 but it's
still usable. I notice that while .debug_ranges is quite large the
.debug_aranges section is small. I wonder through what hoops gdb needs to
go to get at the entry address for main() - I can imagine that because
the late LTO debug only contains the ranges attribute but not DW_AT_name
gdb has to follow all LTO debug DIE abstract origins. Since those
abstract origins are in DW_TAG_imported_unit imported CUs it may (hopefully
lazily!) need to parse those when an abstract origin refers to a DIE
within them.
At least I don't see sth like a "symbol table" refering to the late LTO DIEs
in DWARF.
Maybe if we're lucky and main() is the very first DIE we run into startup
would be faster.
Of course looking at the startup / breakpoint differences between LTO
and non-LTO might yield to a better understanding of things here. For
example it might be possible to optimize the poking at DW_AT_name
via an abstract origin _without_ needing to pull in all of the imported
unit if it's from such kind of searching.
When using callgrind it seems that the whole complication comes in via
symbol_file_add_main -> ... -> read_symbols -> ... -> read_psyms ->
dwarf2_build_psymtabs as expected. So somehow avoiding to pull in all
the early LTO CUs would be the thing to do(?) - maybe we can add
DW_AT_linkage_name to the late generated DIEs to help gdb (we seem
to not do that). In fact we seem to add them to the early DIEs
(probably needed for TYPE_DECLs).
I'm trying a hack like
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c (revision 264418)
+++ gcc/dwarf2out.c (working copy)
@@ -6018,6 +6018,9 @@ dwarf2out_register_external_die (tree de
break;
case FUNCTION_DECL:
die = new_die (DW_TAG_subprogram, parent, decl);
+ /* This helps debuggers to build a symbol table. */
+ if (! flag_wpa && flag_incremental_link != INCREMENTAL_LINK_LTO)
+ add_linkage_name (die, decl);
break;
case VAR_DECL:
die = new_die (DW_TAG_variable, parent, decl);
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following makes it work for a simple C int main() {}. It's also a little
bit less hacky...
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c (revision 264418)
+++ gcc/dwarf2out.c (working copy)
@@ -26896,6 +26896,10 @@ dwarf2out_decl (tree decl)
static void
dwarf2out_function_decl (tree decl)
{
+ if (in_lto_p)
+ /* This helps debuggers to build a symbol table. */
+ if (dw_die_ref die = lookup_decl_die (decl))
+ add_linkage_attr (die, decl);
dwarf2out_decl (decl);
call_arg_locations = NULL;
call_arg_loc_last = NULL;
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #7)
> The following makes it work for a simple C int main() {}. It's also a little
> bit less hacky...
>
> Index: gcc/dwarf2out.c
> ===================================================================
> --- gcc/dwarf2out.c (revision 264418)
> +++ gcc/dwarf2out.c (working copy)
> @@ -26896,6 +26896,10 @@ dwarf2out_decl (tree decl)
> static void
> dwarf2out_function_decl (tree decl)
> {
> + if (in_lto_p)
> + /* This helps debuggers to build a symbol table. */
> + if (dw_die_ref die = lookup_decl_die (decl))
> + add_linkage_attr (die, decl);
> dwarf2out_decl (decl);
> call_arg_locations = NULL;
> call_arg_loc_last = NULL;
Doesn't seem to help gdb at all.
Maybe gdb pulls in all the early CUs because of the stray DIEs we have
for optimized out functions, like
<2><423bc64>: Abbrev Number: 5 (DW_TAG_subprogram)
<423bc65> DW_AT_abstract_origin: <0x3419cf1>
<423bc69> DW_AT_sibling : <0x423bc73>
<3><423bc6d>: Abbrev Number: 6 (DW_TAG_formal_parameter)
<423bc6e> DW_AT_abstract_origin: <0x3419cfe>
<3><423bc72>: Abbrev Number: 0
since we create them at tree streaming time rather than when actually
outputting them (PR83941). My idea for that is to create those lazily
somehow, like having dwarf2out_register_external_die populate an
on-the-side representation and lookup_decl_die querying that if the
DIE wasn't created already.
I also notice that breaking on a function doesn't seem to work (if there are
only inline/IPA optimized instances(?)). gdb doesn't stop.
auto-completion also takes ages. So whatever gdb does it isn't very
efficient ;)
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we end up with an almost fully set ssa_edge_worklist because we add all the
PHIs from blocks we already processed by having visited the backedge defs. But
the backedge isn't actually yet executable and avoiding to set those bits
brings down the set to a maximum size of 2985 (compared to ~700000 before).
So a simpler patch for this particular issue is
Index: gcc/tree-ssa-propagate.c
===================================================================
--- gcc/tree-ssa-propagate.c (revision 264438)
+++ gcc/tree-ssa-propagate.c (working copy)
@@ -168,15 +170,26 @@ add_ssa_edge (tree var)
FOR_EACH_IMM_USE_FAST (use_p, iter, var)
{
gimple *use_stmt = USE_STMT (use_p);
+ basic_block use_bb = gimple_bb (use_stmt);
/* If we did not yet simulate the block wait for this to happen
and do not add the stmt to the SSA edge worklist. */
- if (! (gimple_bb (use_stmt)->flags & BB_VISITED))
+ if (! (use_bb->flags & BB_VISITED))
continue;
+ /* If this is a use on a not yet executable edge do not bother to
+ queue it. */
+ if (gimple_code (use_stmt) == GIMPLE_PHI
+ && !(EDGE_PRED (use_bb, PHI_ARG_INDEX_FROM_USE (use_p))->flags
+ & EDGE_EXECUTABLE))
+ return;
+
if (prop_simulate_again_p (use_stmt)
&& bitmap_set_bit (ssa_edge_worklist, gimple_uid (use_stmt)))
{
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Thu, 20 Sep 2018 12:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The problem is with the file process_mci.f90: if I compile all the other files
with r264428 and process_mci.f90 with r263915, the test succeeds.
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Thu, 20 Sep 2018 12:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86877
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Sep 20 12:58:16 2018
New Revision: 264439
URL: https://gcc.gnu.org/viewcvs?rev=264439&root=gcc&view=rev
Log:
Add missing alignment checks in epilogue loop vectorisation (PR 86877)
Epilogue loop vectorisation skips vect_enhance_data_refs_alignment
since it doesn't make sense to version or peel the epilogue loop
(that will already have happened for the main loop). But this means
that it also fails to check whether the accesses are suitably aligned
for the new vector subarch.
We don't seem to carry alignment information from the (potentially
peeled or versioned) main loop to the epilogue loop, which would be
good to fix at some point. I think we want this patch regardless,
since there's no guarantee that the alignment requirements are the
same for every subarch.
2018-09-20 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/86877
* tree-vect-loop.c (vect_analyze_loop_2): Call
vect_verify_datarefs_alignment.
gcc/testsuite/
PR tree-optimization/86877
* gfortran.dg/vect/vect-8-epilogue.F90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/vect/vect-8-epilogue.F90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug target/87288] [8/9 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"
Date: Thu, 20 Sep 2018 13:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87288
--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Sep 20 12:58:23 2018
New Revision: 264440
URL: https://gcc.gnu.org/viewcvs?rev=264440&root=gcc&view=rev
Log:
Fix PEELING_FOR_NITERS calculation (PR 87288)
PEELING_FOR_GAPS now means "peel one iteration for the epilogue",
in much the same way that PEELING_FOR_ALIGNMENT > 0 means
"peel that number of iterations for the prologue". We weren't
taking this into account when deciding whether we needed to peel
further scalar iterations beyond the iterations for "gaps" and
"alignment".
Only the first test failed before the patch. The other two
are just for completeness.
2018-09-20 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/87288
* tree-vect-loop.c (vect_analyze_loop_2): Take PEELING_FOR_GAPS
into account when determining PEELING_FOR_NITERS.
gcc/testsuite/
PR tree-optimization/87288
* gcc.dg/vect/pr87288-1.c: New test.
* gcc.dg/vect/pr87288-2.c: Likewise,
* gcc.dg/vect/pr87288-3.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr87288-1.c
trunk/gcc/testsuite/gcc.dg/vect/pr87288-2.c
trunk/gcc/testsuite/gcc.dg/vect/pr87288-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug target/87368] New: missing masking inline functions for VCVTSS2SD and VCVTSD2SS
Date: Thu, 20 Sep 2018 13:48:00 -0000
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Bug ID: 87368
Summary: missing masking inline functions for VCVTSS2SD and
VCVTSD2SS
Product: gcc
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Other than for the scalar float to/from integer conversion insns, the scalar
float <-> float ones allow a mask to be applied.
Out of the set of 5 each that the SDM shows, only _mm_cvt_roundsd_ss() and
_mm_cvt_roundss_sd() are actually available.
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
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Bug 53947 depends on bug 86877, which changed state.
Bug 86877 Summary: ICE in vectorizable_load, at tree-vect-stmts.c:8038
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86877
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44729
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44729&action=edit
patch
This avoids most of the forwarders (slightly hackish) and adds linkage names.
gdb startup is faster, more testing is in progress.
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #9)
> Created attachment 44729 [details]
> patch
>
> This avoids most of the forwarders (slightly hackish) and adds linkage names.
>
> gdb startup is faster, more testing is in progress.
Hm. Looks like we hit
Reading symbols from ../../obj3/gcc/lto1...done.
../../gdb/dictionary.c:690: internal-error: void
insert_symbol_hashed(dictionary*, symbol*): Assertion `SYMBOL_LANGUAGE (sym) ==
DICT_LANGUAGE (dict)->la_language' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)
with the patch which somehow feels familiar ...
The performance testing was on an earlier patch w/o the abstract-origin fixes
(just on-demand DIE creation).
The above also reproduces with gengtype (but not with a simple test).
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #10)
> (In reply to Richard Biener from comment #9)
> > Created attachment 44729 [details]
> > patch
> >
> > This avoids most of the forwarders (slightly hackish) and adds linkage names.
> >
> > gdb startup is faster, more testing is in progress.
>
> Hm. Looks like we hit
>
> Reading symbols from ../../obj3/gcc/lto1...done.
> ../../gdb/dictionary.c:690: internal-error: void
> insert_symbol_hashed(dictionary*, symbol*): Assertion `SYMBOL_LANGUAGE (sym)
> == DICT_LANGUAGE (dict)->la_language' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session? (y or n)
>
> with the patch which somehow feels familiar ...
>
> The performance testing was on an earlier patch w/o the abstract-origin fixes
> (just on-demand DIE creation).
>
> The above also reproduces with gengtype (but not with a simple test).
OK, also genchecksum. We see that for example on
Compilation Unit @ offset 0x20a2:
Length: 0x3b4 (32-bit)
Version: 4
Abbrev Offset: 0x83c
Pointer Size: 8
<0><20ad>: Abbrev Number: 1 (DW_TAG_compile_unit)
<20ae> DW_AT_producer : (indirect string, offset: 0xe27): GNU C17
9.0.0
20180919 (experimental) [trunk revision 259470] -mtune=generic -march=x86-64
-g -O2 -flto=jobserver -frandom-seed=1
<20b2> DW_AT_language : 12 (ANSI C99)
<20b3> DW_AT_name : (indirect string, offset: 0x1020):
/tmp/trunk/libiberty/xstrerror.c
...
<2><244c>: Abbrev Number: 18 (DW_TAG_variable)
<244d> DW_AT_name : (indirect string, offset: 0x1019): errstr
<2451> DW_AT_decl_file : 7
<2452> DW_AT_decl_line : 56
<2453> DW_AT_decl_column : 9
<2454> DW_AT_type : <0x2122>
Compilation Unit @ offset 0x245a:
Length: 0x8df (32-bit)
Version: 4
Abbrev Offset: 0x93f
Pointer Size: 8
<0><2465>: Abbrev Number: 1 (DW_TAG_compile_unit)
<2466> DW_AT_producer : (indirect string, offset: 0x1090): GNU GIMPLE
9
.0.0 20180919 (experimental) [trunk revision 259470] -mtune=generic
-march=x86-6
4 -mtune=generic -march=x86-64 -g -O2 -O2 -fno-openmp -fno-openacc
-frandom-seed
=1 -fno-exceptions -fasynchronous-unwind-tables -fno-common -fno-PIE -fltrans
<246a> DW_AT_language : 4 (C++)
<246b> DW_AT_name : (indirect string, offset: 0x106e):
<artificial>
...
<1><2589>: Abbrev Number: 2 (DW_TAG_subprogram)
<258a> DW_AT_abstract_origin: <0x2434>
<258e> DW_AT_linkage_name: (indirect string, offset: 0x1041): xstrerror
<2592> DW_AT_low_pc : 0x401300
<259a> DW_AT_high_pc : 0x28
<25a2> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<25a4> DW_AT_GNU_all_call_sites: 1
<25a4> DW_AT_sibling : <0x264b>
...
<2><25b5>: Abbrev Number: 4 (DW_TAG_variable)
<25b6> DW_AT_abstract_origin: <0x244c>
<25ba> DW_AT_location : 0xfae (location list)
<25be> DW_AT_GNU_locviews: 0xfaa
<1><2c4f>: Abbrev Number: 22 (DW_TAG_imported_unit)
<2c50> DW_AT_import : <0x20ad> [Abbrev Number: 1]
maybe because we "merge" languages in gen_compile_unit_die:
/* If our producer is LTO try to figure out a common language to use
from the global list of translation units. */
if (strcmp (language_string, "GNU GIMPLE") == 0)
{
unsigned i;
tree t;
const char *common_lang = NULL;
FOR_EACH_VEC_SAFE_ELT (all_translation_units, i, t)
{
if (!TRANSLATION_UNIT_LANGUAGE (t))
continue;
if (!common_lang)
common_lang = TRANSLATION_UNIT_LANGUAGE (t);
else if (strcmp (common_lang, TRANSLATION_UNIT_LANGUAGE (t)) == 0)
;
else if (strncmp (common_lang, "GNU C", 5) == 0
&& strncmp (TRANSLATION_UNIT_LANGUAGE (t), "GNU C", 5) ==
0)
/* Mixing C and C++ is ok, use C++ in that case. */
common_lang = highest_c_language (common_lang,
TRANSLATION_UNIT_LANGUAGE (t));
else
{
/* Fall back to C. */
common_lang = NULL;
break;
}
}
or maybe because the DW_TAG_imported_unit is too late? (I also see we have
duplicate imports at least with the patch).
Not sure what the correct representation is for abstract instances in a
C CU but the concrete instance being "inlined" out-of-line into a C++ CU.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87270] "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Thu, 20 Sep 2018 16:35:00 -0000
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| |pault at gcc dot gnu.org
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> This seems to have been fixed by revision r264008 on trunk
Seems the segfault is 'fixed' due to the fact that the finalizer is not called
on trunk any more. I get the output:
main: check 1
create: check 1
create: check 2
main: check 2
create: check 1
create: check 2
main: check 3
That's not a proper fix, of course. It rather seems that one bug (the segfault)
is hidden by another one (namely that the finalizer is not called) ?!?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87369] New: Regression on aarch64/copysign-bsl.c since r264264
Date: Thu, 20 Sep 2018 16:56:00 -0000
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Bug ID: 87369
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Since r264264, I've noticed a regression on
FAIL: gcc.target/aarch64/copysign-bsl.c scan-assembler b(sl|it|if)\tv[0-9]
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Subject: [Bug c++/87075] [7/8/9 Regression] ICE when compiling the test suite of GLM 0.9.9.0
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c++/87075] [7/8/9 Regression] ICE when compiling the test suite of GLM 0.9.9.0
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Sep 20 17:09:19 2018
New Revision: 264442
URL: https://gcc.gnu.org/viewcvs?rev=264442&root=gcc&view=rev
Log:
PR c++/87075 - ICE with constexpr array initialization.
My patch of 2016-08-26 to avoid calling a trivial default constructor
introduced TARGET_EXPRs initialized with void_node to express trivial
initialization. But when this shows up in a VEC_INIT_EXPR, we weren't
prepared to handle it. Fixed by handling it explicitly in
cxx_eval_vec_init_1.
* constexpr.c (cxx_eval_vec_init_1): Handle trivial initialization.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-array6.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug middle-end/87370] New: Regression in return struct code
Date: Thu, 20 Sep 2018 18:10:00 -0000
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Bug ID: 87370
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Test case: https://gcc.godbolt.org/z/58JsxE
```
struct A
{
int b[4];
};
struct B
{
char a[12];
int b;
};
struct C
{
char a[16];
};
A f1(int i)
{
return { };
}
B f2(int i)
{
return { };
}
C f3(int i)
{
return { };
}
```
On x86_64 it create assembly:
```
f1(int):
xor eax, eax
xor edx, edx
ret
f2(int):
pxor xmm0, xmm0
xor eax, eax
movaps XMMWORD PTR [rsp-24], xmm0
mov rdx, QWORD PTR [rsp-16]
ret
f3(int):
xor eax, eax
xor edx, edx
ret
```
Clang and GCC 6.3 generate same code for every function functions.
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From: "mwoehlke.floss at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/87371] New: Spurious -Wreturn-type warning with "pathological" for
Date: Thu, 20 Sep 2018 18:12:00 -0000
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Bug ID: 87371
Summary: Spurious -Wreturn-type warning with "pathological" for
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Consider the following code:
int foo()
{
for (int y = 0; !y;)
for (/*decl*/; !y; ++y)
return 1;
}
This generates a -Wreturn-type warning, despite that the inner loop body will
*always* execute. Moreover, with optimization enabled, the compiler does (as
expected) successfully remove the loops entirely.
(This is a simplified version of a pre-C++17 `with` statement. The purpose of
this code, which is usually a macro, is to look like the opening statement of a
block, where `/*decl*/` — omitted in this example — is in scope only until the
end of the block. FWIW, the C++17 form, `if (/*decl*/; true)` does not exhibit
the problem.)
Live example: https://godbolt.org/g/5xM6C3. Possibly related to #67629 and/or
#85914.
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From: "egall at gwmail dot gwu.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/63886] float will fit into int with abs - possible missing warning Wabsolute-value
Date: Thu, 20 Sep 2018 18:16:00 -0000
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--- Comment #12 from Eric Gallager <egall at gwmail dot gwu.edu> ---
I think someone added the -Wabsolute-value warning flag to GCC
recently; is it ok to close this bug now?
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Subject: [Bug middle-end/87370] Regression in return struct code
Date: Thu, 20 Sep 2018 18:19:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Changed with:
commit 350f354acdd2224797f93a979fff38cb631548a3
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Aug 11 15:51:01 2016 +0000
Use TImode for piecewise move in 64-bit mode
Use TImode for piecewise move in 64-bit mode. We should use TImode in
32-bit mode and use OImode or XImode if they are available. But since
by_pieces_ninsns determines the widest mode with MAX_FIXED_MODE_SIZE,
we can only use TImode in 64-bit mode.
gcc/
* config/i386/i386.h (MOVE_MAX_PIECES): Use TImode in 64-bit
mode if unaligned SSE load and store are optimal.
gcc/testsuite/
* gcc.target/i386/pieces-memcpy-1.c: New test.
* gcc.target/i386/pieces-memcpy-2.c: Likewise.
* gcc.target/i386/pieces-memcpy-3.c: Likewise.
* gcc.target/i386/pieces-memcpy-4.c: Likewise.
* gcc.target/i386/pieces-memcpy-5.c: Likewise.
* gcc.target/i386/pieces-memcpy-6.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239378
138bc75d-0d04-0410-961f-82ee72b054a4
>From gcc-bugs-return-615773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 18:19:47 2018
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87270] "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Thu, 20 Sep 2018 18:32:00 -0000
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to janus from comment #2)
> (In reply to Dominique d'Humieres from comment #1)
> > This seems to have been fixed by revision r264008 on trunk
>
> Seems the segfault is 'fixed' due to the fact that the finalizer is not
> called on trunk any more. I get the output:
>
> main: check 1
> create: check 1
> create: check 2
> main: check 2
> create: check 1
> create: check 2
> main: check 3
>
> That's not a proper fix, of course. It rather seems that one bug (the
> segfault) is hidden by another one (namely that the finalizer is not called)
> ?!?
Hmmm! The behaviour is now the same as 7-branch and so the referencing of the
array components using the span field has been fixed.
It seems that finalization has never occurred with any branch for this case,
going back to 6-branch and, looking through trans-decl.c, I cannot see any
point in which finalization would be triggered. I think that the span bug was
causing 'cleanup' to be called erroneously by accessing memory that was not
null (each finalizer call in the code is guarded by a check that the pointer is
non-null.)
I would have to go back to the standard to see what is expected here.
Keep this one waiting.
Cheers
Paul
>From gcc-bugs-return-615774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 18:32:29 2018
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Subject: [Bug c++/86881] [8, 9 regression] tree check fail with flag Wshadow-compatible-local
Date: Thu, 20 Sep 2018 19:35:00 -0000
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--- Comment #8 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #7)
> Thanks Christophe, I noticed that when checking the 8 backport and committed
> a fix, so updating should make it work.
Indeed it works since r264394.
Thanks!
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Subject: [Bug bootstrap/87013] Error: junk at end of line, first unrecognized character is `i'
Date: Thu, 20 Sep 2018 19:35:00 -0000
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--- Comment #9 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Thu Sep 20 19:34:30 2018
New Revision: 264449
URL: https://gcc.gnu.org/viewcvs?rev=264449&root=gcc&view=rev
Log:
[PR87013] check for .loc is_stmt support in the assembler
Back when we had the logic to output is_stmt but never exercised it,
it didn't matter that we didn't test for assembler support for it.
But there are still assemblers out there that do not support it, so
now that we enable the formerly latent is_stmt logic, we'd better make
sure the assembler can deal with it.
for gcc/ChangeLog
PR bootstrap/87013
* configure.ac: Check for .loc is_stmt support.
* configure, config.in: Rebuilt.
* dwarf2out.c (dwarf2out_source_line): Skip is_stmt
if not supported.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config.in
trunk/gcc/configure
trunk/gcc/configure.ac
trunk/gcc/dwarf2out.c
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Subject: [Bug middle-end/87054] misaligned asm output is turned into dereferenced pointer-to-aligned
Date: Thu, 20 Sep 2018 21:16:00 -0000
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--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Thu Sep 20 19:34:44 2018
New Revision: 264450
URL: https://gcc.gnu.org/viewcvs?rev=264450&root=gcc&view=rev
Log:
[PR87054] fix unaligned access
Building an ADDR_EXPR uses the canonical type to build the pointer
type, but then, as we dereference it, we lose track of lax alignment
known to apply to the dereferenced object. This might not be a
problem in general, but it is when the compiler implicitly introduces
address taking and dereferencing, as it does for asm statements, and
as it may do in some loop optimizations.
From: Richard Biener <rguenther@suse.de>
for gcc/ChangeLog
PR middle-end/87054
* gimplify.c (gimplify_expr): Retain alignment of
addressable lvalue in dereference.
From: Alexandre Oliva <oliva@adacore.com>
for gcc/testsuite/ChangeLog
PR middle-end/87054
* gcc.dg/pr87054.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/pr87054.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:25:01 2018
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/87371] Spurious -Wreturn-type warning with "pathological" for
Date: Thu, 20 Sep 2018 21:25:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The warning happens in the front-end, so there is no concept of
always-executed. You don't need a loop. This also warns.
int foo()
{
int y=0;
if (!y)
return 1;
}
*** This bug has been marked as a duplicate of bug 67629 ***
>From gcc-bugs-return-615777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:16:13 2018
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87338] gcc 8.2 fails to bootstrap on ia64
Date: Thu, 20 Sep 2018 21:25:00 -0000
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John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |glaubitz at physik dot fu-berlin.d
| |e
--- Comment #5 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
According to the build logs [1], one of the major differences when the
regression was introduced, was the use of a newer binutils version:
With binutils_2.30, gcc-8.1.0 builds fine:
> https://buildd.debian.org/status/fetch.php?pkg=gcc-8&arch=ia64&ver=8.1.0-9&stamp=1530078388&raw=0
With binutils_2.30.90.20180710, the build fails:
> https://buildd.debian.org/status/fetch.php?pkg=gcc-8&arch=ia64&ver=8.1.0-10&stamp=1531402269&raw=0
The changelog for the Debian gcc-8 package can be found here:
> http://metadata.ftp-master.debian.org/changelogs/main/g/gcc-8/gcc-8_8.2.0-7_changelog
The changes for 8.1.0-10 were:
* Update to SVN 20180712 (r262577) from the gcc-8-branch.
- Fix PR libstdc++/86272, PR libstdc++/86127, PR target/85904,
PR libstdc++/85098, PR libstdc++/85671, PR libstdc++/83982,
PR libstdc++/86292, PR libstdc++/86138, PR libstdc++/84087,
PR libstdc++/86398, PR hsa/86371, PR tree-optimization/86492,
PR c++/86400, PR target/86285 (PPC), PR debug/86064,
PR target/86222 (PPC), PR rtl-optimization/85645,
PR rtl-optimization/85645, PR target/86314 (x86), PR sanitizer/86406,
PR c++/86398, PR c++/86378, PR c++/86320, PR c++/80290,
PR fortran/82969, PR fortran/86242, PR fortran/82865.
* Enable decimal float support on kfreebsd-amd64. Closes: #897416.
@Jason: Can you try building 8.1.0-9 from snapshot.debian.org with
binutils_2.30.90.20180710?
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Subject: [Bug middle-end/60725] [-Wreturn-type] false positive in trivial switch
Date: Thu, 20 Sep 2018 21:31:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #10 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Mário Feroldi from comment #9)
> Note that this version of `f1` doesn't prevent the warning. I wonder why?
>
> enum E { E1 };
> static inline int f1(enum E e) {
> (e == E1) ? void() : __builtin_unreachable(); // *
> switch (e) {
> case E1: return 1;
> }
> }
> int main () {
> f1(E1);
> return 0;
> }
Because the warning comes from the front-end and there is no data flow in the
front-end.
*** This bug has been marked as a duplicate of bug 67629 ***
>From gcc-bugs-return-615779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:25:03 2018
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Subject: [Bug c/67629] bogus -Wreturn-type in a function with tautological if-else
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mwoehlke.floss at gmail dot com
--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 87371 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:31:14 2018
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Subject: [Bug c/67629] bogus -Wreturn-type in a function with tautological if-else
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |skvadrik at gmail dot com
--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 60725 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-615782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:35:31 2018
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Subject: [Bug c++/49931] valid code rejected (named operator)
Date: Thu, 20 Sep 2018 21:49:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Last reconfirmed|2012-08-24 00:00:00 |2018-9-20
CC| |manu at gcc dot gnu.org
Summary|bug when use named |valid code rejected (named
|operators |operator)
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
GCC 9 says:
<source>: In member function 'FOO2<T>::operator FOO2<T>::type() const':
<source>:10:48: error: 'struct FOO' has no member named 'operator
FOO2<T>::type'
10 | operator type() const { return t->operator type(); }
| ^~~~
Clang compiles it.
Testcase:
struct FOO
{
operator int() const { return static_cast< int >(7); }
operator double() const { return static_cast< double >(7); } };
template < typename T >
struct FOO2
{
typedef T type;
operator type() const { return t->operator type(); }
private:
FOO* t;
};
int main()
{
FOO2< int > foo2; foo2.operator int();
return 1;
}
>From gcc-bugs-return-615783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 20 21:49:02 2018
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Subject: [Bug c++/85914] -Wreturn-type false positive with a ternary that is always false (fixed?)
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-20
Summary|-Wreturn-type false |-Wreturn-type false
|positive with a ternary |positive with a ternary
|that is always false |that is always false
| |(fixed?)
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This does not warn in GCC 9. It will be worth adding the testcase to the
testsuite.
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Subject: [Bug c++/81674] gcc cannot detect missing initialisers for fields in constructors
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
CC| |manu at gcc dot gnu.org
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The patch here: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19808#c29
once finished should be able to catch this, because it walks the
mem-initializer list and marks whatever is initialized. At the end of the list,
it could just warn about whatever was not initialized.
There will be false positives because it will not look at the body of the
constructor but this is something that could be improved later and, in any
case, it will never be fixed because it is as hard as -Wuninitialized.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85070] [8/9 Regression] ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409
Date: Thu, 20 Sep 2018 23:20:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paolo.carlini at oracle dot com
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Nathan, I stumbled into this minor regression and noticed that the ICE happens
exactly at the gcc_assert in lazily_declare_fn that you added as part of
r248285:
/* Add it to the class */
bool added = add_method (type, fn, false);
gcc_assert (added);
but, for the testcase, during error-recovery added is false because add_method
issued a correct - I believe - error_at + inform. Thus, is it only matter of
loosening a bit the gcc_assert, eg added || errorcount, or something deeper is
going on?
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Subject: [Bug c++/87109] Wrong overload picked with ref-qualifiers
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87109
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Sep 20 23:20:19 2018
New Revision: 264452
URL: https://gcc.gnu.org/viewcvs?rev=264452&root=gcc&view=rev
Log:
PR c++/87109 - wrong ctor with maybe-rvalue semantics.
* call.c (build_user_type_conversion_1): Refine the maybe-rvalue
check to only return if we're converting the return value to a base
class.
* g++.dg/cpp0x/ref-qual19.C: Adjust the expected results.
* g++.dg/cpp0x/ref-qual20.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/ref-qual20.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/ref-qual19.C
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Subject: [Bug c++/85070] [8/9 Regression] ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409
Date: Fri, 21 Sep 2018 00:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85070
--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
|| errorcount sounds completely plausible
>From gcc-bugs-return-615788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 00:17:32 2018
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From: "eric-bugs at omnifarious dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87372] New: __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
Date: Fri, 21 Sep 2018 01:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87372
Bug ID: 87372
Summary: __PRETTY_FUNCTION__ not constexpr in gcc trunk on
compiler explorer
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: c++
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This code will not compile with gcc trunk on compiler explorer. But it works
with gcc 8.2 on that some site. I'm worried this is a regression in current C++
development.
constexpr int zstrlen(char const *s)
{
int i = 0;
while (s[i]) ++i;
return i;
}
int joe()
{
constexpr char const * const foo = __PRETTY_FUNCTION__;
constexpr int foolen = zstrlen(foo);
return foolen;
}
It fails to work because __PRETTY_FUNCTION__ isn't constexpr in gcc trunk. I
get this error message:
<source>: In function 'int joe()':
<source>:11:35: in 'constexpr' expansion of 'zstrlen(((const char*)foo))'
<source>:11:39: error: the value of '__PRETTY_FUNCTION__' is not usable in a
constant expression
11 | constexpr int foolen = zstrlen(foo);
| ^
<source>:10:40: note: '__PRETTY_FUNCTION__' was not declared 'constexpr'
10 | constexpr char const * const foo = __PRETTY_FUNCTION__;
| ^~~~~~~~~~~~~~~~~~~
Compiler returned: 1
Here is a link:
https://godbolt.org/z/8IdAae
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Subject: [Bug c++/40752] -Wconversion generates false warnings for operands not larger than target type
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org,
| |umesh.kalappa0 at gmail dot com
--- Comment #29 from Eric Gallager <egallager at gcc dot gnu.org> ---
This came up on the gcc mailing list again here:
https://gcc.gnu.org/ml/gcc/2018-09/msg00076.html
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Subject: [Bug lto/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Fri, 21 Sep 2018 01:37:00 -0000
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--- Comment #26 from Gubbins <dave.gittins at gmail dot com> ---
If anyone is interested, I received the following response on my bug report
with Apple.
> This issue behaves as intended based on the following:
>
> The program produced by ld64 seems fine:
>
> [/tmp/35663253]> nm -nm foo
> (undefined) external __Unwind_Resume (from libSystem)
> (undefined) external __ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEE8overflowEi (from libstdc++)
> (undefined) external __ZNSt6localeC1Ev (from libstdc++)
> (undefined) external __ZNSt6localeD1Ev (from libstdc++)
> (undefined) external __ZTVSt15basic_streambufIcSt11char_traitsIcEE (from libstdc++)
> (undefined) external __ZTVSt15basic_stringbufIcSt11char_traitsIcESaIcEE (from libstdc++)
> (undefined) weak external __ZdlPv (from libstdc++)
> (undefined) external ___gxx_personality_v0 (from libstdc++)
> (undefined) external dyld_stub_binder (from libSystem)
> 0000000000001000 (absolute) [referenced dynamically] external __mh_execute_header
> 0000000000001dee (__TEXT,__text) weak external __ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEED1Ev
> 0000000000001e3f (__TEXT,__text_startup) external _main
> 0000000000002060 (__DATA,__gcc_except_tab) non-external GCC_except_table0
> 0000000000002080 (__DATA,__data) weak external __ZNSs4_Rep20_S_empty_rep_storageE
>
> [/tmp/35663253]> dyldinfo -weak_bind foo
> weak binding information:
> segment section address type addend symbol
> __DATA __got 0x00002010 pointer 0 __ZNSs4_Rep20_S_empty_rep_storageE
> __DATA __la_symbol_ptr 0x00002040 pointer 0 __ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEED1Ev
> __DATA __la_symbol_ptr 0x00002058 pointer 0 __ZdlPv
> __DATA __la_symbol_ptr 0x00002058 pointer 0 __ZdlPv
>
> The problem has to do with __ZNSs4_Rep20_S_empty_rep_storageE. That symbol is also in libstdc++.6.dylib and is expected to be coalesced.
>
> [/tmp/35663253]> nm -m libstdc++.6.dylib | grep __ZNSs4_Rep20_S_empty_rep_storageE
> 0000000000137020 (__DATA,__pu_bss5) extern
> al __ZNSs4_Rep20_S_empty_rep_storageE
>
> The problem is that it is not “weak†in libstdc++.6.dylib. It is a regular exported symbol. If it were weak, then at runtime dyld would coalesce it with the one in the program “fooâ€.
>
> macOS does not use “flat namespaceâ€. It uses two level namespace where every symbol found in a dylib at build time has the dylib in which it was found recorded and at runtime dyld only looks there. The exception to this is weak symbols, where dyld looks across all dylibs and picks one, then adjusts all uses in all dylibs to use that choosen one.
>
> The static linker (ld64) knows those rules and when building a dylib that exports a non-weak symbol, the linker optimizes all uses within that dylib to directly use that symbol. That is what is happening in libstdc++.6.dylib. __ZNSs4_Rep20_S_empty_rep_storageE is not weak, so when libstdc++.6.dylib all uses of __ZNSs4_Rep20_S_empty_rep_storageE are directly bound to use the copy in libstdc++.6.dylib. There is nothing dyld can do at runtime to change that.
>
> The fix here is that __ZNSs4_Rep20_S_empty_rep_storageE needs to be weak when libstdc++.6.dylib is built.
>From gcc-bugs-return-615791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:37:47 2018
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Subject: [Bug lto/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
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--- Comment #27 from Gubbins <dave.gittins at gmail dot com> ---
> Dave, the fix for PR 86138 might also fix this case for Darwin - could you
> check that please?
I can confirm that using my homebrew-installed gcc 8.2.0 package on OSX, the
issue no longer occurs. I don't know if the change made for PR 86138 is
responsible but I believe 8.2.0 was the first release to include it.
>From gcc-bugs-return-615792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:49:10 2018
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Subject: [Bug rtl-optimization/18446] [meta-bug] We need to distinguish value extension and value truncation
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |egallager at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
For this to be a meta-bug it should depend on other bugs, but it doesn't.
Should the meta-bug label be removed?
>From gcc-bugs-return-615793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:51:17 2018
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Subject: [Bug rtl-optimization/18395] [meta-bug] combine needs to be templatized like a peepholer
Date: Fri, 21 Sep 2018 01:54:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
I think the way meta-bugs are done has been changed; should the bugs blocking
this be moved to "Depends on" instead?
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
Date: Fri, 21 Sep 2018 01:54:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|__PRETTY_FUNCTION__ not |[9 Regression]
|constexpr in gcc trunk on |__PRETTY_FUNCTION__ not
|compiler explorer |constexpr in gcc trunk on
| |compiler explorer
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r263392.
>From gcc-bugs-return-615795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:54:45 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/16992] [meta-bug] -fpermissive causes some diagnostic problems
Date: Fri, 21 Sep 2018 01:58:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
All the bugs that this one depends upon have been closed, so I'm closing this
one too. Feel free to reopen if a large number of -fpermissive bugs crop up
again that need to be grouped together.
>From gcc-bugs-return-615796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:58:22 2018
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Subject: [Bug c++/14167] Unneeded C++ types are output in debug info due to use of static constants
Date: Fri, 21 Sep 2018 01:59:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-debug
CC| |egallager at gcc dot gnu.org,
| |pinskia at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
This is the last bug still open that blocks bug 24551; fixing this would allow
us to close that one too.
>From gcc-bugs-return-615797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 01:59:31 2018
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Subject: [Bug target/21824] [meta-bug] bootstrap bugs for *-gnu*
Date: Fri, 21 Sep 2018 02:01:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Alfred M. Szmidt from comment #1)
> Could someone go over these bugs and commit the pending patches?
Only bug 21823 is left now.
>From gcc-bugs-return-615798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 02:01:43 2018
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Subject: [Bug other/21823] MAXPATHLEN usage in [gcc]/fixincludes
Date: Fri, 21 Sep 2018 02:03:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
CC| |pinskia at gcc dot gnu.org
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Alfred M. Szmidt from comment #4)
> > Created attachment 9857 [details]
> > Don't use arbitrary limits.
> >
> > The following fixes fixincludes.
> >
> > fixincludes/ChangeLog
> > 2005-09-16 Alfred M. Szmidt <ams@gnu.org>
> >
> > * fixincl.c (quoted_file_exists): Use xmalloc to allocate memory
> > for FNAME.
> > (create_file): Use xmalloc to allocate memory for FNAME.
> >
> > * server.c (server_setup): Use dynamic allocation for BUFF.
>
> Please send this patch to the gcc-patches mailing list for review, if it
> still
> applies
>
> MAXPATHLEN is still used in fixincludes. Seeing that this patch is
> over 10 years, I am not sure it even applies and thus a good idea to
> forward it to gcc-patches for review. The fix is simple enough in
> fixincludes (simply use xmalloc).
ok, adding "easyhack" keyword then
>From gcc-bugs-return-615799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 02:03:04 2018
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Subject: [Bug target/25893] [meta-bug] cris-linux: various libgomp tests fail
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Since this bug only depends on 1 other bug, does it still need to keep the
"meta-bug" label, or can that be removed?
>From gcc-bugs-return-615800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 02:05:07 2018
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Subject: [Bug other/39302] [meta-bug] bugs waiting for Copyright Assignment acknowledgemt for ARC International (UK) Ltd
Date: Fri, 21 Sep 2018 02:07:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jorn Wolfgang Rennecke from comment #1)
> Confirmation received. I'll have to send out the patches now.
Have you done this yet? Also does this need to keep the "meta-bug" label or can
that be removed?
>From gcc-bugs-return-615801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 02:07:56 2018
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Subject: [Bug target/39725] [6/7/8/9 Regression][cond-optab] MIPS pessimizations on floating-point
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> ---
This is the last of the bugs blocking bug 39714 that is still open; closing
this one would allow us to close that one as well.
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From: "eric-bugs at omnifarious dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
Date: Fri, 21 Sep 2018 02:13:00 -0000
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--- Comment #2 from eric-bugs at omnifarious dot org ---
Also, this works in clang 6.0 (with --std=c++17), but not gcc 8.2:
--------
#include <array>
constexpr int ce_strlen(char const *s)
{
int i = 0;
while (s[i]) ++i;
return i;
}
template <int len>
constexpr auto as_array(char const *s)
{
::std::array<char, len + 1> output{};
for (int i = 0; i < len; ++i) {
output[i] = s[i];
}
output[output.size() - 1] = '\0';
return output;
}
template <unsigned long s1, unsigned long s2>
constexpr auto paste_array(::std::array<char, s1> a, ::std::array<char, s2> b)
{
constexpr unsigned long tlen = s1 + s2 - 1;
::std::array<char, tlen> output{};
int o = 0;
for (unsigned long i = 0; i < s1; ++i, ++o) {
output[o] = a[i];
}
--o;
for (unsigned long i = 0; i < s2; ++i, ++o) {
output[o] = b[i];
}
return output;
}
#define stringify(x) #x
#define evstringify(x) stringify(x)
char const * joe()
{
constexpr static auto mystr =
paste_array(paste_array(as_array<ce_strlen(__PRETTY_FUNCTION__)>(__PRETTY_FUNCTION__),
as_array<sizeof(" at line ") - 1>(" at line ")),
as_array<ce_strlen(evstringify(__LINE__))>(evstringify(__LINE__)));
return mystr.data();
}
>From gcc-bugs-return-615803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 02:13:27 2018
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Subject: [Bug bootstrap/17464] [meta-bug] The newly built gcc shared libraries aren't used for bootstap and check
Date: Fri, 21 Sep 2018 03:12:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |egallager at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
All the bugs upon which this meta-bug depends have been closed, so I'm going to
close this one, too. Feel free to reopen if more bugs crop up that need to be
grouped under this one.
>From gcc-bugs-return-615804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 03:12:48 2018
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From: "godmar at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70555] lambda capture of multi-dimensional VLA
Date: Fri, 21 Sep 2018 03:15:00 -0000
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Godmar Back <godmar at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |godmar at gmail dot com
--- Comment #10 from Godmar Back <godmar at gmail dot com> ---
Created attachment 44730
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44730&action=edit
failing test
$ g++ dungeonpreprocessed.cpp
dungeon.cpp: In lambda function:
dungeon.cpp:40:68: internal compiler error: in expand_expr_real_1, at
expr.c:9908
auto neighbors = [L, R, C, &CC] (Point p) -> vector<Point> {
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
>From gcc-bugs-return-615805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 03:15:59 2018
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Subject: [Bug c++/70555] lambda capture of multi-dimensional VLA
Date: Fri, 21 Sep 2018 03:57:00 -0000
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--- Comment #11 from Godmar Back <godmar at gmail dot com> ---
I have attached a test case where capture of multidimensional VLA results in
internal compiler error: in expand_expr_real_1, at expr.c:9908
I do not know if this is a duplicate of this bug or a separate bug.
The program compiles and runs fine with clang 3.6.2, so I believe this should
be valid C++.
If this is a different bug and you'd like me to file a separate bug report, let
me know.
The behavior disappeared if the 'CC' array is no longer VLA.
>From gcc-bugs-return-615806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 03:57:09 2018
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch for the original problem posted:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01206.html
>From gcc-bugs-return-615807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 05:25:39 2018
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From: "eric-bugs at omnifarious dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
Date: Fri, 21 Sep 2018 06:51:00 -0000
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--- Comment #4 from eric-bugs at omnifarious dot org ---
Should I file a new bug with my new comment in it? I should probably test
against a trunk with your change in it first.
>From gcc-bugs-return-615808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 06:51:58 2018
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From: "murat.ursavas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87373] New: Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 07:19:00 -0000
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Bug ID: 87373
Summary: Packed structs are not handled properly on ARM
architecture even with misaligned access is enabled
Product: gcc
Version: unknown
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Assignee: unassigned at gcc dot gnu.org
Reporter: murat.ursavas at gmail dot com
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Created attachment 44731
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44731&action=edit
Minimum Test Case
Hi,
I've faced a weird behavior on my ARM MCU about a year ago and reported it on
the launchpad page. In the meantime I tried to report the issue at here but
your register process is longer than expected and here I'm reporting this issue
almost a year later.
We'd discussed the issue on this page:
https://bugs.launchpad.net/gcc-arm-embedded/+bug/1738730
I think this looks like a bug, but with my limited internal GCC knowledge, I
don't want to be rude and call it like that directly.
If I should summarize the discussion;
The GCC versions from 5.2 to 7, the compiler generates unexpected code while
handling packed structs. Normally the behavior should be like 4.9 but somehow
it got broken since then. Misaligned access should help but this does not seem
to be the case.
I've attached a minimum example which reproduces the issue.
About the seriousness; I can not update my compiler and still use 4.9 for our
products. This is a annoying drawback for me because I know GCC has received
many improvements since then. The IDE which I use is still deployed with 4.9
and this is unacceptable from my point of view.
MCU Core: ARM Cortex M3
>From gcc-bugs-return-615809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 07:19:04 2018
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Subject: [Bug sanitizer/85835] libsanitizer includes <sys/ustat.h> unconditionally
Date: Fri, 21 Sep 2018 07:29:00 -0000
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--- Comment #9 from Matthias Klose <doko at gcc dot gnu.org> ---
Author: doko
Date: Fri Sep 21 07:18:26 2018
New Revision: 264457
URL: https://gcc.gnu.org/viewcvs?rev=264457&root=gcc&view=rev
Log:
2017-09-21 Matthias Klose <doko@ubuntu.com>
Backported from the gcc-7-branch:
2018-05-24 H.J. Lu <hongjiu.lu@intel.com>
PR sanitizer/85835
* sanitizer_common/sanitizer_platform_limits_posix.cc: Don't
include <sys/ustat.h> for Linux.
(SIZEOF_STRUCT_USTAT): New.
(struct_ustat_sz): Use SIZEOF_STRUCT_USTAT for Linux.
Modified:
branches/gcc-6-branch/libsanitizer/ChangeLog
branches/gcc-6-branch/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
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Subject: [Bug tree-optimization/86990] [9 regression] wrong code at -O2 on x86_64-linux-gnu in 64-bit mode
Date: Fri, 21 Sep 2018 07:49:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Sep 21 07:28:42 2018
New Revision: 264458
URL: https://gcc.gnu.org/viewcvs?rev=264458&root=gcc&view=rev
Log:
PR tree-optimization/86990
* gimple-ssa-store-merging.c (imm_store_chain_info:coalesce_immediate):
Check that the entire merged store group is made of constants only for
overlapping stores.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/20180921-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/86990] [9 regression] wrong code at -O2 on x86_64-linux-gnu in 64-bit mode
Date: Fri, 21 Sep 2018 08:35:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug target/87374] New: ICE in extract_insn, at recog.c:2305
Date: Fri, 21 Sep 2018 08:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87374
Bug ID: 87374
Summary: ICE in extract_insn, at recog.c:2305
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
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Following ICEs:
$ arm-linux-gnueabi-gcc
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/ubsan/align-1.c
-mslow-flash-data -mword-relocations -mcpu=cortex-m7
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/ubsan/align-1.c: In
function ‘main’:
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/ubsan/align-1.c:41:1:
error: unrecognizable insn:
41 | }
| ^
(insn 52 51 53 2 (set (reg:SI 3 r3)
(lo_sum:SI (reg:SI 3 r3)
(const:SI (plus:SI (symbol_ref:SI ("v") [flags 0x2] <var_decl
0x7ffff7fee240 v>)
(const_int 80 [0x50])))))
"/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/ubsan/align-1.c":37 -1
(expr_list:REG_EQUAL (const:SI (plus:SI (symbol_ref:SI ("v") [flags 0x2]
<var_decl 0x7ffff7fee240 v>)
(const_int 80 [0x50])))
(nil)))
during RTL pass: mach
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/ubsan/align-1.c:41:1:
internal compiler error: in extract_insn, at recog.c:2305
0x58f313 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/rtl-error.c:108
0x58f32f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/rtl-error.c:116
0x58e844 extract_insn(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/recog.c:2305
0x9accb1 extract_insn_cached(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/recog.c:2194
0x7a1b82 cleanup_subreg_operands(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/final.c:3314
0x9aa4cc split_insn
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/recog.c:2929
0x9aefb7 split_all_insns_noflow()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/recog.c:3055
0xd00ffe arm_reorg
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/config/arm/arm.c:17660
0x9d7f39 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/reorg.c:3984
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Subject: [Bug target/87195] ICE in simplify_binary_operation_1, at simplify-rtx.c:3637
Date: Fri, 21 Sep 2018 08:57:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you reproduce that Segher?
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 08:59:00 -0000
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Umesh Kalappa <umesh.kalappa0 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |umesh.kalappa0 at gmail dot com
--- Comment #1 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
with trunk i see below output for the attached case .
main:
@ args = 0, pretend = 0, frame = 8
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
sub sp, sp, #8
movw r3, #1025
str r3, [sp]
ldr r0, [sp]
ldr r3, .L4
uxtb r0, r0
str sp, [r3]
add sp, sp, #8
@ sp needed
bx lr
$ arm-windriver-linux-gnueabi-gcc -mcpu=cortex-m3 -mthumb '-DDEBUG=1' -O2
-pedantic -Wall -Wextra -fmessage-length=0 -mno-sched-prolog -fno-builtin
-fshort-enums test.c -S
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 09:01:00 -0000
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--- Comment #2 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Hi Umesh,
Could you test it with the following options:
-g3 -gdwarf-2 -mcpu=cortex-m3 -mthumb -std=c++1y '-DDEBUG=1' -O0 -pedantic
-Wall -Wextra -c -fmessage-length=0 -fno-rtti -fno-exceptions -mno-sched-prolog
-fno-builtin -fpack-struct -fshort-enums -ffunction-sections -fdata-sections
Thanks in advance.
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Subject: [Bug rtl-optimization/87375] New: Conditional jump or move depends on uninitialised value(s) in calculate_allocation_cost (ira.c:2453)
Date: Fri, 21 Sep 2018 09:18:00 -0000
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Bug ID: 87375
Summary: Conditional jump or move depends on uninitialised
value(s) in calculate_allocation_cost (ira.c:2453)
Product: gcc
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When I configure GCC with --enable-valgrind-annotations I see:
$ cat valgrind.i
void
foo (void)
{
}
$ /home/marxin/Programming/gcc2/objdir/./gcc/xgcc
-B/home/marxin/Programming/gcc2/objdir/./gcc/ valgrind.i -fpic -c -m32
==14970== Conditional jump or move depends on uninitialised value(s)
==14970== at 0xB1F9DF: calculate_allocation_cost (ira.c:2453)
==14970== by 0xB1F9DF: ira (ira.c:5381)
==14970== by 0xB1F9DF: (anonymous namespace)::pass_ira::execute(function*)
(ira.c:5610)
==14970== by 0xBFB361: execute_one_pass(opt_pass*) (passes.c:2446)
==14970== by 0xBFBB07: execute_pass_list_1(opt_pass*) (passes.c:2535)
==14970== by 0xBFBB19: execute_pass_list_1(opt_pass*) (passes.c:2536)
==14970== by 0xBFBB58: execute_pass_list(function*, opt_pass*)
(passes.c:2546)
==14970== by 0x8F25EA: cgraph_node::expand() (cgraphunit.c:2121)
==14970== by 0x8F3783: output_in_order (cgraphunit.c:2365)
==14970== by 0x8F3783: symbol_table::compile() [clone .part.73]
(cgraphunit.c:2609)
==14970== by 0x8F5C5C: compile (cgraphunit.c:2522)
==14970== by 0x8F5C5C: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2788)
==14970== by 0xCD6993: compile_file() (toplev.c:480)
==14970== by 0x78020F: do_compile (toplev.c:2170)
==14970== by 0x78020F: toplev::main(int, char**) (toplev.c:2305)
==14970== by 0x78380A: main (main.c:39)
==14970==
I see quite some many of these doing --enable-checking=valgrind
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
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--- Comment #3 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
With -O0 , i see the byte load /store like
push {r7}
sub sp, sp, #12
add r7, sp, #0
ldr r2, .L3
mov r3, r7
str r3, [r2]
ldr r3, .L3
ldr r3, [r3]
ldrb r2, [r3]
movs r2, #0
orr r2, r2, #1
strb r2, [r3]
ldrb r2, [r3, #1]
movs r2, #0
orr r2, r2, #4
strb r2, [r3, #1]
ldrb r2, [r3, #2]
movs r2, #0
strb r2, [r3, #2]
ldrb r2, [r3, #3]
movs r2, #0
strb r2, [r3, #3]
ldr r3, .L3
ldr r3, [r3]
ldr r2, [r3] @ unaligned
ldr r3, .L3
ldr r3, [r3]
uxtb r2, r2
strb r2, [r3, #4]
ldr r3, .L3
ldr r3, [r3]
ldrb r3, [r3, #4] @ zero_extendqisi2
mov r0, r3
adds r7, r7, #12
mov sp, r7
@ sp needed
pop {r7}
bx lr
but ,why you are compiling with -O0 , any reason such ?
>From gcc-bugs-return-615818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:28:00 2018
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Subject: [Bug tree-optimization/86990] [9 regression] wrong code at -O2 on x86_64-linux-gnu in 64-bit mode
Date: Fri, 21 Sep 2018 09:29:00 -0000
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--- Comment #5 from Zhendong Su <su at cs dot ucdavis.edu> ---
Thanks for the fix, Eric.
>From gcc-bugs-return-615819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:29:13 2018
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Subject: [Bug target/87195] ICE in simplify_binary_operation_1, at simplify-rtx.c:3637
Date: Fri, 21 Sep 2018 09:37:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|ppc64le-linux-gnu |powerpc*-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
Host|x86_64-linux-gnu |
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. Any powerpc target, -ffloat-store -mlittle, -O1 or more.
>From gcc-bugs-return-615820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:37:15 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 09:39:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #0)
> I've faced a weird behavior on my ARM MCU about a year ago and reported it
> on the launchpad page. In the meantime I tried to report the issue at here
> but your register process is longer than expected and here I'm reporting
> this issue almost a year later.
Umm, you got a bugzilla account here on Wed, 20 Dec 2017, so any delay since
then is not because of our process :-)
>From gcc-bugs-return-615821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:39:12 2018
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Subject: [Bug fortran/85737] gfortran 8.1.0 false positive with -Wdo-subscript
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Ignacio Fernández Galván <jellby at yahoo dot com> changed:
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CC| |jellby at yahoo dot com
--- Comment #2 from Ignacio Fernández Galván <jellby at yahoo dot com> ---
I hope "more extensive data flow analysis" could easily include simple
conditions involving the array index. (j > 4) is a pretty good indication that
j-3 > 1, at least to a human.
>From gcc-bugs-return-615822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:45:55 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 09:46:00 -0000
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--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
It's not clear what behaviour you think is 'proper' for a packed struct with a
volatile member. Since packed is a GNU extension, there's nothing in the C (or
C++) standards that you can call upon to reach a reasonable expectation, and
anything that is left must be down to either the GNU manuals or good luck. In
this case I don't think the GNU manuals say anything specific about this case
either (since that would imply knowing how each supported architecture handles
misaligned memory accesses.
>From gcc-bugs-return-615823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:47:03 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 09:51:00 -0000
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--- Comment #6 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Hi Jonathan,
I just wanted a dramatic entrance :) (There was a discussion about GCC bugzilla
on reddit recently) Of course it hasn't took that long. But this is like
missing a call. You would answer that at that time but if you miss it, it
becomes difficult to call back :)
>From gcc-bugs-return-615824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:51:10 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 09:58:00 -0000
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--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #6)
> Hi Jonathan,
>
> I just wanted a dramatic entrance :) (There was a discussion about GCC
> bugzilla on reddit recently) Of course it hasn't took that long. But this is
> like missing a call. You would answer that at that time but if you miss it,
> it becomes difficult to call back :)
Unfortunately we had to disable automatic account creation due to spammers
abusing it. This is a volunteer project and we can't have admins sitting
around just waiting for real people to ask for accounts so that they can
respond instantly.
>From gcc-bugs-return-615825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 09:58:00 2018
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Subject: [Bug lto/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
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--- Comment #28 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, Dave. That's very helpful.
(In reply to Gubbins from comment #26)
> > The fix here is that __ZNSs4_Rep20_S_empty_rep_storageE needs to be weak when libstdc++.6.dylib is built.
Or make sure the explicit instantiation is declared in <string> so that the
symbol is not emitted in the program, and the one in libstdc++.6.dylib is
always used. Which is how this bug was fixed.
I need to investigate whether we have a problem with any other explicit
instantiations which are not declared in headers, e.g. these ones
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libstdc%2B%2B-v3/src/c%2B%2B11/ext11-inst.cc;h=5d16ea6ea185be25be48e030de74e3448eddf2e6;hb=HEAD
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, I read the discussion on reddit, it was annoying. It took 7h18m for your
account to be created after you sent an email requesting it. Then it took 9
months for you to use the account. On the other hand, since we started the
manual registration process we've had no spam attacks. The process is working
IMHO.
>From gcc-bugs-return-615827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 10:34:23 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 10:38:00 -0000
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--- Comment #9 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Umesh,
The reason is step-by-step debugging. I'd like to debug it first with -O0, than
pack it with -Os for the release. Otherwise with a low resource MCU, things
become messy really fast.
>From gcc-bugs-return-615828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 10:38:11 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 10:51:00 -0000
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--- Comment #10 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Jonathan,
I don't blame any of you and very well aware of the volunteering effort. Please
don't get me wrong. It's just me attempted multiple times to open the case but
get distracted with something else.
Let's concentrate on the case, OK? :)
Thanks for your efforts again, I appreciate that and try to make more people
appreciate it.
>From gcc-bugs-return-615829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 10:51:21 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 10:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #13 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 44732
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44732&action=edit
Promised shorted reproducer, 93 lines
This is the promised shortened reproducer, 93 lines long. This should make it
easier to find the problem.
>From gcc-bugs-return-615830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 10:59:16 2018
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From: "murat.ursavas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 11:00:00 -0000
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--- Comment #11 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Richard,
I don't know about the standards as you are and please accept me as a newbie.
The peripheral parameters of the manufacturer library are all defined as
volatile structs and accessed with pointers. This is working till 4.9 but not
after 5.2.
So point me to the right direction, who should fix what and how?
I can't fix my software or use a workaround because I need packed structs. I
tried many other options but none of them worked.
To understand the matter I'd like to ask, the trunk is creating the code Umesh
just sent and this doesn't look like I expect. Is the code correct?
As far as I know I should see a shorter one with enabled unaligned access,
which looks default on Cortex-M3 architecture. Of course I would like to have
shorter image but longer image was not helping and assigning wrong values to
the variables. Minimum test case has been written to show that.
>From gcc-bugs-return-615831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 11:00:32 2018
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Subject: [Bug middle-end/81035] noreturn leads to worse code due to lack of sibcall optimization
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Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-21
Assignee|unassigned at gcc dot gnu.org |fw at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Florian Weimer <fw at gcc dot gnu.org> ---
Documentation patch posted:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01224.html
>From gcc-bugs-return-615832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 11:11:33 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 11:18:00 -0000
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--- Comment #12 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Richard,
Ok I remembered things with reading the old posts on launchpad. The compiler
was generating normal code if I use the struct variable directly. But if I use
a pointer to access it, it assigns not what I try to assign.
Isn't that a compiler bug?
>From gcc-bugs-return-615833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 11:18:42 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 11:40:00 -0000
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--- Comment #13 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Richard,
Also as far as I remember GNU manual was indeed saying something on this case.
It was saying that "if the struct is not packed, it would access to members
word by word. But if unaligned access is disabled, it would access the
variables byte by byte and create longer and slower images. With unaligned
access, it should access to the struct members again word by word."
I can't show where it's written but I remember it.
With the direct access, it is indeed accessing word by word no matter
-pack-struct option is. But if I access it indirectly with a pointer, it tries
to access byte by byte and still can't assign the values developer want.
>From gcc-bugs-return-615834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 11:40:08 2018
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Subject: [Bug middle-end/87054] misaligned asm output is turned into dereferenced pointer-to-aligned
Date: Fri, 21 Sep 2018 11:43:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
The new testcase FAILs on 32-bit x86:
+FAIL: gcc.dg/pr87054.c (test for excess errors)
+UNRESOLVED: gcc.dg/pr87054.c compilation failed to produce executable
Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/pr87054.c:6:13: error:
'__int128' is not supported on this target
Seems to require int128 support.
>From gcc-bugs-return-615835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 11:43:01 2018
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Subject: [Bug target/87376] New: [avr] Miscompilation with __memx and long long addition
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87376
Bug ID: 87376
Summary: [avr] Miscompilation with __memx and long long
addition
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: saaadhu at gcc dot gnu.org
Target Milestone: ---
Attempting to add a __memx long long with a long long in the generic address
space results in wrong code. 2 of the 8 bytes of the variable in __memx do not
get loaded at all.
Compiling the below code with -Os -mmcu=avr51
extern const __memx long long a;
extern const long long b;
long long add (void) { return a + b;}
results in the following assembly output. Note the missing loads for a+3 and
a+4.
<snip>
ldi r24,lo8(a)
ldi r25,hi8(a)
ldi r26,hlo8(a)
movw r30,r24
mov r21,r26
call __xload_1
mov r18,r22
ldi r24,lo8(a+1)
ldi r25,hi8(a+1)
ldi r26,hlo8(a+1)
movw r30,r24
mov r21,r26
call __xload_1
mov r19,r22
ldi r24,lo8(a+2)
ldi r25,hi8(a+2)
ldi r26,hlo8(a+2)
movw r30,r24
mov r21,r26
call __xload_1
mov r20,r22
ldi r24,lo8(a+5)
ldi r25,hi8(a+5)
ldi r26,hlo8(a+5)
movw r30,r24
mov r21,r26
call __xload_1
mov r23,r22
ldi r24,lo8(a+6)
ldi r25,hi8(a+6)
ldi r26,hlo8(a+6)
movw r30,r24
mov r21,r26
call __xload_1
mov r24,r22
ldi r25,lo8(a+7)
mov r12,r25
ldi r25,hi8(a+7)
mov r13,r25
ldi r25,hlo8(a+7)
mov r14,r25
movw r30,r12
mov r21,r14
call __xload_1
mov r25,r22
lds r10,b
lds r11,b+1
lds r12,b+2
lds r13,b+3
lds r14,b+4
lds r15,b+5
lds r16,b+6
lds r17,b+7
call __adddi3
</snip>
>From gcc-bugs-return-615836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 12:07:23 2018
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Subject: [Bug c++/87150] [8 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Fri, 21 Sep 2018 12:30:00 -0000
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--- Comment #16 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Stephan Bergmann from comment #15)
> I see that with the fix from comment 13 included, the slightly changed source
>
> #include <utility>
> struct S1 { S1(S1 &&); };
> struct S2: S1 {};
> S1 f(S2 s) { return std::move(s); }
>
> causes -Wredundant-move (when that warning is explicitly requested).
Shall I file a separate issue for that?
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 12:34:00 -0000
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--- Comment #14 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #13)
> Richard,
>
> Also as far as I remember GNU manual was indeed saying something on this
> case. It was saying that "if the struct is not packed, it would access to
> members word by word. But if unaligned access is disabled, it would access
> the variables byte by byte and create longer and slower images. With
> unaligned access, it should access to the struct members again word by word."
>
> I can't show where it's written but I remember it.
>
> With the direct access, it is indeed accessing word by word no matter
> -pack-struct option is. But if I access it indirectly with a pointer, it
> tries to access byte by byte and still can't assign the values developer
> want.
That's because in the direct case it can see that the object is on the stack
and aligned, so the value can be read simply without an unaligned object. Once
the object is accessed through the pointer the knowledge of the alignment is
lost and accesses have to be done more conservatively.
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 12:39:00 -0000
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--- Comment #15 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #12)
> Richard,
>
> Ok I remembered things with reading the old posts on launchpad. The compiler
> was generating normal code if I use the struct variable directly. But if I
> use a pointer to access it, it assigns not what I try to assign.
>
> Isn't that a compiler bug?
I'm still not sure what you're saying is incorrect, based on your testcase.
Are you talking about the value returned from the function, or the types of
memory access being used? ie, if we lay aside for the moment that this is
accessing a device, does the program behave correctly in terms of the values
read and written?
>From gcc-bugs-return-615839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 12:39:59 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 12:57:00 -0000
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--- Comment #16 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
OK I understand conservative action and not wait for word by word access. But
the resulting value is not 0x401 on the test case, but it should be.
In my original case this was effecting a USART peripheral register and it was
activating different switches and making the peripheral useless.
To make the case worse, if you assign some important physical pins on the same
port, this bug can make them work differently. Let's say, it can pull a trigger
without intention, because GPIO peripherals simply waits for bit assignments.
>From gcc-bugs-return-615840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 12:57:32 2018
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Subject: [Bug c++/87377] New: error with generic lambda accessing static field through argument within return type
Date: Fri, 21 Sep 2018 12:58:00 -0000
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Bug ID: 87377
Summary: error with generic lambda accessing static field
through argument within return type
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…that's a mouthful. Here's the code:
template <auto _val>
struct const_val {
static constexpr auto val = _val;
};
int main() {
auto lambda = [](auto i) -> const_val<i.val> { while (1); };
lambda(const_val<5>());
}
Currently, GCC trunk rejects this:
% /tmp/gcct/bin/g++ b.cpp -std=c++2a
b.cpp: In function ‘int main()’:
b.cpp:6:48: error: template argument 1 is invalid
6 | auto lambda = [](auto i) -> const_val<i.val> { while (1); };
|
However, Clang accepts it.
I think this is a bug in GCC, because GCC does accept i.val as a constant
expression within the function body; for example, the example compiles if the
definition of 'lambda' is changed to:
auto lambda = [](auto i) {
const_val<i.val> c;
while (1);
};
It also accepts this:
auto lambda = [](auto i) -> const_val<decltype(i)::val> { while (1); };
>From gcc-bugs-return-615841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 12:58:16 2018
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Subject: [Bug sanitizer/82501] AddressSanitizer does not handle negative offset for first global variable
Date: Fri, 21 Sep 2018 13:02:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
I started working on this, but it's not easy to register dummy global
variables. If I see correctly, global vars are emitted into assembly here:
#0 assemble_variable (decl=<var_decl 0x7ffff7feeab0 global3>, top_level=0,
at_end=1, dont_output_data=0) at /home/marxin/Programming/gcc/gcc/varasm.c:2271
#1 0x0000000000fe1502 in varpool_node::assemble_decl (this=<varpool_node *
const 0x7ffff6b0b000 "global3"/0>) at
/home/marxin/Programming/gcc/gcc/varpool.c:586
#2 0x000000000090d12d in output_in_order () at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2369
#3 symbol_table::compile (this=0x7ffff6990100) at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2609
#4 0x000000000090f54d in symbol_table::compile (this=0x7ffff6990100) at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2788
#5 symbol_table::finalize_compilation_unit (this=0x7ffff6990100) at
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2788
#6 0x0000000000cf4164 in compile_file () at
/home/marxin/Programming/gcc/gcc/toplev.c:480
#7 0x0000000000798e80 in do_compile () at
/home/marxin/Programming/gcc/gcc/toplev.c:2170
#8 toplev::main (this=0x7fffffffd90e, argc=<optimized out>, argv=<optimized
out>) at /home/marxin/Programming/gcc/gcc/toplev.c:2305
#9 0x00000000015db48d in main (argc=20, argv=0x7fffffffda08) at
/home/marxin/Programming/gcc/gcc/main.c:39
Will it be needed to check that a variable is asan_protect_global (decl) and if
it's first variable in a section then emit a dummy global variable here? It's
crucial to put the dummy variable at the very beginning of each section.
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Subject: [Bug c++/87150] [8 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Fri, 21 Sep 2018 13:16:00 -0000
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--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes please.
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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 13:32:00 -0000
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--- Comment #17 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #16)
> OK I understand conservative action and not wait for word by word access.
> But the resulting value is not 0x401 on the test case, but it should be.
Is not 0x401 at what point? This part of the sequence:
ldr r3, .L3 < &testStructPtr
ldr r3, [r3] < testStructPtr
ldrb r2, [r3] < testStructPtr->one[byte 0] (dead)
movs r2, #0 < 0
orr r2, r2, #1 < 1
strb r2, [r3] < testStructPtr->one[byte 0] = 0x01
ldrb r2, [r3, #1] < testStructPtr->one[byte 1] (dead)
movs r2, #0 < 0
orr r2, r2, #4 < 4
strb r2, [r3, #1] < testStructPtr->one[byte 1] = 0x04
ldrb r2, [r3, #2]
movs r2, #0
strb r2, [r3, #2] < testStructPtr->one[byte 2] = 0x00
ldrb r2, [r3, #3]
movs r2, #0
strb r2, [r3, #3] < testStructPtr->one[byte 3] = 0x00
so successive bytes starting at &(testStructPtr->one) contain 0x01, 0x04, 0x00,
0x00 which is the value in the source code.
>From gcc-bugs-return-615844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 13:32:18 2018
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
Date: Fri, 21 Sep 2018 13:35:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
CC| |avieira at gcc dot gnu.org,
| |thopre01 at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-615845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 13:35:16 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 14:17:00 -0000
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--- Comment #18 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
BTW, are you really trying to say that your hardware has a register that isn't
naturally aligned? That's really weird if so. If not, there are much easier
ways to handle this sort of stuff.
>From gcc-bugs-return-615846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 14:17:47 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Fri, 21 Sep 2018 14:20:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Fri Sep 21 14:17:07 2018
New Revision: 264481
URL: https://gcc.gnu.org/viewcvs?rev=264481&root=gcc&view=rev
Log:
dumpfile.c: fix stray dump_loc output (PR tree-optimization/87309)
In r262891 I reimplemented this call:
dump_printf_loc (MSG_NOTE, loc, "=== %s ===\n", name);
in dump_begin_scope to use direct calls to dump_loc:
if (dump_file)
{
dump_loc (MSG_NOTE, dump_file, loc.get_location_t ());
fprintf (dump_file, "=== %s ===\n", name);
}
if (alt_dump_file)
{
dump_loc (MSG_NOTE, alt_dump_file, loc.get_location_t ());
fprintf (alt_dump_file, "=== %s ===\n", name);
}
However ::dump_loc doesn't filter with pflags and alt_flags.
This lead to stray output of the form:
test.cpp:1:6: note: test.cpp:1:11: note:
when using -fopt-info with "optimized" or "missed".
This patch adds this missing filtering, eliminating the stray partial
note output.
gcc/ChangeLog:
PR tree-optimization/87309
* dumpfile.c (dump_context::begin_scope): Filter the dump_loc
calls with pflags and alt_flags.
(selftest::test_capture_of_dump_calls): Add test of interaction of
MSG_OPTIMIZED_LOCATIONS with AUTO_DUMP_SCOPE.
gcc/testsuite/ChangeLog:
PR tree-optimization/87309
* gcc.dg/pr87309.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87309.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dumpfile.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 14:20:21 2018
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Subject: [Bug c++/87378] New: False -Wredundant-move (derived vs. base)
Date: Fri, 21 Sep 2018 14:20:00 -0000
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Bug ID: 87378
Summary: False -Wredundant-move (derived vs. base)
Product: gcc
Version: 9.0
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On recent trunk, with bug 87150 fixed (so that the compiler agrees that the
std::move is actually required):
> ~ cat test.cc
> #include <utility>
> struct S1 { S1(S1 &&); };
> struct S2: S1 {};
> S1 f(S2 s) { return std::move(s); }
>
> ~ g++ -Wredundant-move -c test.cc
> test.cc: In function ‘S1 f(S2)’:
> test.cc:4:30: warning: redundant move in return statement [-Wredundant-move]
> 4 | S1 f(S2 s) { return std::move(s); }
> | ~~~~~~~~~^~~
> test.cc:4:30: note: remove ‘std::move’ call
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Subject: [Bug c++/87150] [8 Regression] move ctor wrongly chosen in return stmt (derived vs. base)
Date: Fri, 21 Sep 2018 14:25:00 -0000
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--- Comment #18 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Jonathan Wakely from comment #17)
> Yes please.
bug 87378
>From gcc-bugs-return-615849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 14:25:51 2018
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Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Fri, 21 Sep 2018 14:31:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Ilya Leoshkevich from comment #4)
> Do we also need to test m_test_pp_flags?
> At least dump_context::emit_item does it.
Thanks. Yes - the version of the patch I committed does this; see:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01233.html
Should be fixed by r264481.
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From: "iii at linux dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87309] [9 Regression] Spurious note: messages when building with -fopt-info-vec-optimized
Date: Fri, 21 Sep 2018 14:35:00 -0000
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--- Comment #7 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Thanks!
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Subject: [Bug c++/87378] False -Wredundant-move (derived vs. base)
Date: Fri, 21 Sep 2018 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87378
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
Ever confirmed|0 |1
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Subject: [Bug c/87379] New: Warn about function pointer casts which differ in variadic-ness
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87379
Bug ID: 87379
Summary: Warn about function pointer casts which differ in
variadic-ness
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
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Priority: P3
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It is fairly common to assume that that the ... part of a variadic argument
list is a wildcard that that functions and function pointers which agree on the
non-... parts are ABI-compatible. However, this is wrong for x86-64 (where
%rax needs to be set up for variadic parts containing floating point arguments)
and the ELFv2 ABI for POWER (where a parameter save area must be created in the
caller for variadic calls).
So I would like to see a warning for this:
int open (const char *, int, ...);
int (*ptr1) (const char *, int) = (int (*) (const char *, int)) open;
int (*ptr2) (const char *, int, short)
= (int (*) (const char *, int, short)) open;
But perhaps we should not warn for this because the variadic nature is
preserved in the non-prototyped function pointer:
void (*ptr3) () = (void (*) ()) open;
Whether we want to warn for this up to debate because these casts are clearly
different, so it is more likely that the programmer knows what they are doing:
void (*ptr4) (double) = (void (*) (double) open;
Since multiple targets are affected, I think it makes sense to warn for this
issue independently of the current target.
Calls with variadic-ness mismatches cause bugs which can be very difficult to
track down. The bug I particularly remember is this one:
commit c7774174beffe9a8d29dd4fb38bbed43ece1cecd
Author: Andreas Schneider <asn@samba.org>
Date: Wed Aug 2 13:21:59 2017 +0200
swrap: Fix prototype of open[64] to prevent segfault on ppc64le
The calling conventions for vaarg are different on ppc64le. The patch
fixes segfaults on that platform.
<https://git.samba.org/?p=socket_wrapper.git;a=commitdiff;h=c7774174beffe9a8d29dd4fb38bbed43ece1cecd>
Here the problematic pointer came through dlopen, so a warning for casts would
not have helped. It was difficult to diagnose because the lack of the
parameter save area (which was supposed by the called function to be allocated
by the caller) caused stack corruption a couple of frames up the stack, in a
fairly different area of the code.
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 15:16:00 -0000
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--- Comment #19 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
Hi Richard,
This source code had been designed to see word by word access and may create
expected results. I'm not sure about that.
Let me use latest stable and see what happens. It wasn't plug and play last
time but like I said I have to make sure I'm not the root cause. (Looks like
I'm the usual suspect at this :)
Thanks for verifying that this is the expected code, just longer due to more
conservative access style.
This could take a while as I'm struggling to find some extra time to pursue
these.
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 15:27:00 -0000
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--- Comment #20 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
By the way, the hardware peripheral registers are aligned to 32bits.
>From gcc-bugs-return-615855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 15:27:16 2018
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 15:28:00 -0000
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--- Comment #21 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #20)
> By the way, the hardware peripheral registers are aligned to 32bits.
So why don't you define your struct as
struct TestStructType
{
volatile unsigned one;
unsigned char two;
unsigned short three __attribute__((packed));
};
And get rid of the pragma entirely?
>From gcc-bugs-return-615856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 15:28:21 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] New: Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 15:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87380
Bug ID: 87380
Summary: Explicit instantations should use weak symbols on
darwin
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ABI
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
CC: mikestump at comcast dot net
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Target: *-*-darwin*
The response from Apple quoted in 82172 comment 26 says that explicit
instantiation definitions in a dylib need to be weak symbols, otherwise they
won't be merged with other copies of the same symbol in other translation
units:
> The problem is that it is not “weak†in libstdc++.6.dylib. It is a regular
> exported symbol. If it were weak, then at runtime dyld would coalesce it with
> the one in the program “fooâ€.
>
> macOS does not use “flat namespaceâ€. It uses two level namespace where every
> symbol found in a dylib at build time has the dylib in which it was found
> recorded and at runtime dyld only looks there. The exception to this is weak
> symbols, where dyld looks across all dylibs and picks one, then adjusts all
> uses in all dylibs to use that choosen one.
>
> The static linker (ld64) knows those rules and when building a dylib that
> exports a non-weak symbol, the linker optimizes all uses within that dylib
> to directly use that symbol. That is what is happening in libstdc++.6.dylib.
> __ZNSs4_Rep20_S_empty_rep_storageE is not weak, so when libstdc++.6.dylib all
> uses of __ZNSs4_Rep20_S_empty_rep_storageE are directly bound to use the copy
> in libstdc++.6.dylib. There is nothing dyld can do at runtime to change that.
>
> The fix here is that __ZNSs4_Rep20_S_empty_rep_storageE needs to be weak when
> libstdc++.6.dylib is built.
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 15:33:00 -0000
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--- Comment #22 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Or
#pragma pack(push, 1)
struct TestStructType
{
volatile unsigned one;
unsigned char two;
unsigned short three;
} __attribute__((aligned(32)));
#pragma pack(pop)
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Fri, 21 Sep 2018 15:34:00 -0000
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--- Comment #23 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #22)
> Or
> #pragma pack(push, 1)
>
> struct TestStructType
> {
> volatile unsigned one;
> unsigned char two;
> unsigned short three;
> } __attribute__((aligned(32)));
Err, that should be aligned(4), the alignment is in bytes!
>
> #pragma pack(pop)
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> The response from Apple quoted in 82172 comment 26 says that explicit
That should have said Bug 82172 comment 26.
The problem only arises when a template might get implicitly instantiated,
because an explicit instantiations declaration was not seen. In such an object
file can contain implicit instantations and the explicit instantiation in the
dylib isn't needed. Due to the linker behaviour, the two definitions are not
merged and remain separate.
In practice this probably only matters for symbols where the address is taken,
so that duplicate copies of the symbol with different addresses can cause
problems (which was the cause of Bug 82172).
>From gcc-bugs-return-615860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 15:35:29 2018
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Subject: [Bug lto/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Fri, 21 Sep 2018 15:46:00 -0000
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--- Comment #29 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I've opened Bug 87380
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #14 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44733
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44733&action=edit
Patch for the PR
Dear Juergen and Dominique,
Could you please test the attached patch? It eliminates the deallocation of one
of the temporaries produced by:
allocate (process%mci, source=process%component%extract_mci_template ())
but leaves the finalization call used on the other temporary.
When one of the temporaries is deallocated/finalized the other temporary is not
nulled. Hence the valgrind complaints.
Valgrind now shows no errors and that all memory is freed.
Regards
Paul
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Subject: [Bug c/87379] Warn about function pointer casts which differ in variadic-ness
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The handling of variadic functions was discussed during the design
of the -Wcast-function-type warning
(https://gcc.gnu.org/ml/gcc-patches/2017-10/msg00131.html). The assumption was
that such conversions may be common and the idea was to avoid warning when
they're safe. I don't think the warning implementation considers the nuances
between different ABIs. Rather than customizing the warning to each ABI it
might be better to simply tighten it up across the board as suggested.
Not sure if making the warning "smarter" by having it track pointer conversions
across assignments (to detect incompatible function conversions via void*) is
worth exploring. It would still not detect the problem in the dlsym() case
(and others like it) but could lead to a fair amount of noise.
>From gcc-bugs-return-615863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 15:53:52 2018
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to eric-bugs from comment #4)
> Should I file a new bug with my new comment in it? I should probably test
> against a trunk with your change in it first.
Please open a separate PR for the issue in Comment 2, thanks.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #15 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Could you please test the attached patch?
The patch fixes both the reduced and the original tests.
>From gcc-bugs-return-615866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 16:12:39 2018
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 16:16:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The following should run and exit successfully:
$ cat lib.h
template<typename T>
struct A {
static T member;
};
template<typename T>
T A<T>::member;
bool match(int*);
$ cat lib.cc
#include "lib.h"
template class A<int>;
bool match(int* p)
{
return p == &A<int>::member;
}
$ cat main.cc
#include "lib.h"
int main()
{
if (!match(&A<int>::member))
throw 1;
}
$ g++ -shared -fPIC lib.cc -o liblib.so
$ g++ main.cc -L. -llib
$ LD_LIBRARY_PATH=. ./a.out
I'm not able to check if it does on darwin, but this is a simplification of the
problem in PR 82172.
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 16:21:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
On GNU/Linux the symbol in the shared library is a global unique symbol:
$ nm --defined-only -g liblib.so | grep member
000000000020101c u _ZN1AIiE6memberE
It seems that we need to make it weak to ensure that's true on darwin.
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Subject: [Bug c++/87381] New: clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 16:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87381
Bug ID: 87381
Summary: clang 6.0 will compile this constexpr construct, but
gcc 8.2.1 will not.
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric-bugs at omnifarious dot org
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I'm trying to construct profile tags based on __PRETTY_FUNCTION__ at compile
time while making minimal use of preprocessor macros. I've had a lot of
trouble with using integer arguments to constexpr functions, so that's why the
integers are templated. It occurs to me now that this may be because there were
implicit narrowing conversions involved, though the compiler didn't clearly
state this as the reason.
I'm going to try to make a new version of this that tries to be more careful
with how the integers are manipulated to see if it can be made simpler.
--------
#include <array>
constexpr int ce_strlen(char const *s)
{
int i = 0;
while (s[i]) ++i;
return i;
}
template <int len>
constexpr auto as_array(char const *s)
{
::std::array<char, len + 1> output{};
for (int i = 0; i < len; ++i) {
output[i] = s[i];
}
output[output.size() - 1] = '\0';
return output;
}
template <unsigned long s1, unsigned long s2>
constexpr auto paste_array(::std::array<char, s1> a, ::std::array<char, s2> b)
{
constexpr unsigned long tlen = s1 + s2 - 1;
::std::array<char, tlen> output{};
int o = 0;
for (unsigned long i = 0; i < s1; ++i, ++o) {
output[o] = a[i];
}
--o;
for (unsigned long i = 0; i < s2; ++i, ++o) {
output[o] = b[i];
}
return output;
}
#define stringify(x) #x
#define evstringify(x) stringify(x)
char const * joe()
{
constexpr static auto mystr =
paste_array(paste_array(as_array<ce_strlen(__PRETTY_FUNCTION__)>(__PRETTY_FUNCTION__),
as_array<sizeof(" at line ") - 1>(" at line ")),
as_array<ce_strlen(evstringify(__LINE__))>(evstringify(__LINE__)));
return mystr.data();
}
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 16:31:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
Ever confirmed|0 |1
--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> ---
In Darwin dialect...
gcc -v =>
gcc version 9.0.0 20180908 (experimental) [trunk revision 264172] (GCC)
$ ./gcc/xg++ -Bgcc -shared lib.cc -o liblib.dylib
$ ./gcc/xg++ -Bgcc main.cc -L. -llib -o t
$ DYLD_LIBRARY_PATH=. ./t
libc++abi.dylib: terminating with uncaught exception of type int
Abort trap: 6
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 16:34:00 -0000
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--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
fudging the static member to be weak, and rebuilding the lib - the test
completes w/out throwing.
>From gcc-bugs-return-615871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 16:34:07 2018
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From: "paul.richard.thomas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 16:39:00 -0000
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--- Comment #16 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Hi Dominique,
Many thanks for coming back so promptly. I will package it up for a
commit this evening.
Best regards
Paul
On 21 September 2018 at 17:12, dominiq at lps dot ens.fr
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
>
> --- Comment #15 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>> Could you please test the attached patch?
>
> The patch fixes both the reduced and the original tests.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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>From gcc-bugs-return-615872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 16:39:46 2018
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 16:41:00 -0000
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--- Comment #1 from eric-bugs at omnifarious dot org ---
Godbolt link: https://godbolt.org/z/gHnb-G
Also, my attempt to simplify this failed because clang will not consider
arguments to constexpr functions to be constexpr. Which, IMHO, is wrong.
Whether the fault is in the standard or clang, I don't know.
I didn't test to see if my attempts to simplify it would work in gcc because
even this non-simplified example fails.
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Subject: [Bug c++/87364] Pretty print of enumerator never prints the id, always falls back to C-style cast output
Date: Fri, 21 Sep 2018 16:44:00 -0000
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--- Comment #1 from Will Wray <wjwray at gmail dot com> ---
Created attachment 44734
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44734&action=edit
Fix to pretty-print enumerator ids
c-pretty-print.c
c_pretty_printer::constant(tree)
Remove fall through from pp_c_enumeration_constant failure
pp_c_enumeration_constant
Change return type to void (from bool)
Remove return flag (for statefull fall through)
Add line to print the cast integer_constant
Fix the loop comparison - add DECL_INITIAL
pp_c_type_cast
pp_c_integer_constant
Add external linkage (remove 'static')
c-pretty-print.h
Add pp_c_type_cast, pp_c_integer_constant declarations
cxx-pretty-print.c
Copy pp_c_enumeration_constant
to pp_cxx_enumeration_constant
Change id printing to include nested names
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 16:44:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to eric-bugs from comment #1)
> Godbolt link: https://godbolt.org/z/gHnb-G
>
> Also, my attempt to simplify this failed because clang will not consider
> arguments to constexpr functions to be constexpr. Which, IMHO, is wrong.
> Whether the fault is in the standard or clang, I don't know.
It's not wrong. A constexpr function _can_ be used in a constant expression,
but it can also be used elsewhere, in which case its arguments are not
constants.
constexpr int f(int i) {
constexpr int j = 2 * i; // ERROR
return j;
}
int main(int argc, char**) {
return f(argc);
}
How can j be a constexpr variable?
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Subject: [Bug driver/29931] following argv[0] symlink in process_command breaks symlinked-together toolchain
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Harald van Dijk <harald at gigawatt dot nl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |harald at gigawatt dot nl
--- Comment #9 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to Eric Gallager from comment #6)
> (In reply to Jorn Wolfgang Rennecke from comment #4)
> > The bug is not fixed; the gcc.c patch has not been reviewed.
>
> What about now, after r169891?
That was only checked in on a Google branch, so this is not fixed, regardless
of the below.
The check-in applies almost cleanly to GCC 8.2.0, but actually testing it, I
find that it does not work in my test case. I suppose it would work when all
files are put together in a single directory, but that's not the only way
symlinks can be used. I installed packages with DESTDIR into separate
directories, and installed symlinks to the files in each of those using cp -rs.
When the code checks whether spec_machine can be found, it correctly sees that
it can be: GCC is one of the packages that provides that directory. As a
result, -canonical-prefixes is used. However, it cannot find anything from
binutils or glibc there, so things still break.
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From: "eric-bugs at omnifarious dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 17:27:00 -0000
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--- Comment #3 from eric-bugs at omnifarious dot org ---
Ahh, I guess that does make sense. Oh, well. I guess I'm stuck using template
arguments in place of function arguments in some cases.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 17:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #17 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Sep 21 17:26:23 2018
New Revision: 264485
URL: https://gcc.gnu.org/viewcvs?rev=264485&root=gcc&view=rev
Log:
2018-09-21 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87359
* trans-stmt.c (gfc_trans_allocate): Don't deallocate alloc
components if must_finalize is set for expr3.
2018-09-21 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87359
* gfortran.dg/finalize_33.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/finalize_33.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #18 from Paul Thomas <pault at gcc dot gnu.org> ---
Hi Juergen,
Thanks for doing the reduction of the problem and thanks to Dominique for
testing the patch.
Fixed.
Paul
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #19 from Paul Thomas <pault at gcc dot gnu.org> ---
It helps to close it!
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Subject: [Bug fortran/77325] ICE in gimplify_var_or_parm_decl, at gimplify.c:1933
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Sep 21 17:33:29 2018
New Revision: 264486
URL: https://gcc.gnu.org/viewcvs?rev=264486&root=gcc&view=rev
Log:
2018-09-21 Paul Thomas <pault@gcc.gnu.org>
PR fortran/77325
* trans-array.c (gfc_alloc_allocatable_for_assignment): If the
rhs has a charlen expression, convert that and use it.
* trans-expr.c (gfc_trans_assignment_1): The rse.pre for the
assignment of deferred character array vars to a realocatable
lhs should not be added to the exterior block since vector
indices, for example, generate temporaries indexed within the
loop.
2018-09-21 Paul Thomas <pault@gcc.gnu.org>
PR fortran/77325
* gfortran.dg/deferred_character_22.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/deferred_character_22.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 17:34:00 -0000
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--- Comment #4 from eric-bugs at omnifarious dot org ---
Given the new way of looking at things prompted by the correction of my
erroneous idea, I've rethought how to simplify this, and the simplification
does work in gcc 8.2, and I think is generally more correct:
----------
#include <array>
#include <cstddef>
using ary_size_t = ::std::array<char,
::std::numeric_limits<int>::max()>::size_type;
template <::std::size_t len>
constexpr auto as_stdarray(const char (&s)[len])
{
::std::array<char, len> output{};
for (::std::size_t i = 0; i < len; ++i) {
output[i] = s[i];
}
return output;
}
template <ary_size_t s1, ary_size_t s2, ary_size_t... sn>
constexpr auto paste_array(::std::array<char, s1> a, ::std::array<char, s2> b,
::std::array<char, sn>... remaining)
{
constexpr auto numarys = 1 + sizeof...(remaining);
constexpr ary_size_t tlen = ((s1 + s2) + ... + sn) - numarys;
::std::array<char, tlen> output{};
int o = 0;
auto copy_into = [&o, &output](auto const &a) {
for (ary_size_t i = 0; i < a.size(); ++i, ++o) {
output[o] = a[i];
}
--o;
};
copy_into(a);
(copy_into(b) , ... , copy_into(remaining));
return output;
}
#define stringify(x) #x
#define evstringify(x) stringify(x)
char const * joe()
{
constexpr static auto mystr = paste_array(as_stdarray(__FUNCTION__),
as_stdarray(" at line "), as_stdarray(evstringify(__LINE__)));
return mystr.data();
}
----------
Godbolt link: https://godbolt.org/z/jMJ94L
Because ::std::array doesn't trivially decay into a pointer, I find it easier
to work with in a sensible way, which is why I convert everything to an
std::array first. I should probably rename paste_array to concat_zstrings.
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Subject: [Bug c++/87364] Pretty print of enumerator never prints the id, always falls back to C-style cast output
Date: Fri, 21 Sep 2018 17:49:00 -0000
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--- Comment #2 from Will Wray <wjwray at gmail dot com> ---
Created attachment 44735
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44735&action=edit
Test for enumerator id pretty print patch
pp_enum_test
auto_name<auto...> returns std::array<char>, splitting the
non-type arg 'names' from __PRETTY_FUNCTION__
AUTO_NAME(v...) is a macro to display test input and output nicely
Given these enum definitions:
/******************************************/
enum e { a, b, c=b }; // Unscoped global
enum class E : char { a, b, c=b }; // Scoped global
struct U { enum e { a, b, c=b }; }; // Unscoped member
struct S { enum class E { a, b, c=b }; }; // Scoped member
namespace N { enum { a, b, c=b }; } // Namespace anon
int main()
{
enum m { a, b, c=b }; // Unscoped local
enum class M { a, b, c=b }; // Scoped local
struct K { enum e { a, b, c=b }; }; // Unscoped local member
struct L { enum class E {a, b, c=b};}; // Scoped local member
/******************************************/
The test output before the patch (all cast expressions):
================================
auto_name <::a, ::b, ::c, e(3)>
-> (e)0, (e)1, (e)1, (e)3
auto_name <E::a, E::b, E::c, E{3}>
-> (E)0, (E)1, (E)1, (E)3
auto_name <U::a, U::b, U::c, U::e(3)>
-> (U::e)0, (U::e)1, (U::e)1, (U::e)3
auto_name <S::E::a, S::E::b, S::E::c, S::E(3)>
-> (S::E)0, (S::E)1, (S::E)1, (S::E)3
auto_name <N::a, N::b, N::c, decltype(N::a)(3)>
-> (N::._85)0, (N::._85)1, (N::._85)1, (N::._85)3
auto_name <a, b, c, m(3)>
-> (main::m)0, (main::m)1, (main::m)1, (main::m)3
auto_name <M::a, M::b, M::c, M(3)>
-> (main::M)0, (main::M)1, (main::M)1, (main::M)3
auto_name <K::a, K::b, K::c, K::e(3)>
-> (main::K::e)0, (main::K::e)1, (main::K::e)1, (main::K::e)3
auto_name <L::E::a, L::E::b, L::E::c, L::E(3)>
-> (main::L::E)0, (main::L::E)1, (main::L::E)1, (main::L::E)3
The test output after the patch:
===============================
auto_name <::a, ::b, ::c, e(3)>
-> a, b, b, (e)3
auto_name <E::a, E::b, E::c, E{3}>
-> E::a, E::b, E::b, (E)3
auto_name <U::a, U::b, U::c, U::e(3)>
-> U::a, U::b, U::b, (U::e)3
auto_name <S::E::a, S::E::b, S::E::c, S::E(3)>
-> S::E::a, S::E::b, S::E::b, (S::E)3
auto_name <N::a, N::b, N::c, decltype(N::a)(3)>
-> N::a, N::b, N::b, (N::._85)3
auto_name <a, b, c, m(3)>
-> main::a, main::b, main::b, (main::m)3
auto_name <M::a, M::b, M::c, M(3)>
-> main::M::a, main::M::b, main::M::b, (main::M)3
auto_name <K::a, K::b, K::c, K::e(3)>
-> main::K::a, main::K::b, main::K::b, (main::K::e)3
auto_name <L::E::a, L::E::b, L::E::c, L::E(3)>
-> main::L::E::a, main::L::E::b, main::L::E::b, (main::L::E)3
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 18:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #20 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Paul, thanks for the fix, our code test suite is still running, most of the
problems are solved, the unit test suite is completely good now, but there are
certain functional tests failing. This will be really, really hard to give you
a small reproducer. I reopened, you can decide whether you want it on this PR
or a new one.
>From gcc-bugs-return-615884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:09:33 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87382] New: warn for strncpy with a bound greater than the size of source array
Date: Fri, 21 Sep 2018 18:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87382
Bug ID: 87382
Summary: warn for strncpy with a bound greater than the size of
source array
Product: gcc
Version: 9.0
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I got the following feedback/request for an enhancement to
-Wstringop-truncation (or some other warning).
> Example 3: this warns only if src is nonstring (because then it is
> guaranteed to be an invalid program). The issue here is that, since
> Example 1 warns due to "specified bound 12 equals destination size",
> it may be confusing that this doesn't (because the warning of Example
> 1 does not reference src in any way).
>
> extern char dst[12];
> extern char src[4];
> void f(void) {
> // no warning
> strncpy(dst, src, sizeof(dst));
> }
My response is that: here the assumption is that the source is nul-terminated
but
I agree that there is a potential problem lurking here: why would the
programmer specify a larger bound than the size of the source? This might be
worth warning about as well, for that reason. (I.e., not because the result
may not be nul-terminated, but because it suggests that the programmer may have
used the size of the wrong argument as the bound.)
>From gcc-bugs-return-615885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:10:02 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87322] [8/9 Regression] GCC fails to parse captured lambda of 2nd inner lambda if the captured lambda has "," (having 2 arguments)
Date: Fri, 21 Sep 2018 18:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is because we have:
13425 /* If cp_unevaluated_operand is set, we're just looking for a
13426 single dummy parameter, so don't keep going. */
13427 if (DECL_CHAIN (t) && !cp_unevaluated_operand)
13428 DECL_CHAIN (r) = tsubst (DECL_CHAIN (t), args,
13429 complain, DECL_CHAIN (t));
and if cp_unevaluated_operand is true, we don't actually tsubst anything but
the first argument.
cp_unevaluated_operand is set in this case in:
++cp_unevaluated_operand;
++c_inhibit_evaluation_warnings;
type = tsubst_copy_and_build (DECLTYPE_TYPE_EXPR (t), args,
complain|tf_decltype, in_decl,
/*function_p*/false,
/*integral_constant_expression*/false);
...
--cp_unevaluated_operand;
--c_inhibit_evaluation_warnings;
The line 13427 stuff has been added for PR53498, I bet we don't want that in
this case though.
>From gcc-bugs-return-615886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:13:08 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87383] New: improve text and detail in -Wstringop-truncation warnings
Date: Fri, 21 Sep 2018 18:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87383
Bug ID: 87383
Summary: improve text and detail in -Wstringop-truncation
warnings
Product: gcc
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I got the following feedback from a Linux kernel developer on/suggestions for
improvements in -Wstringop-truncation:
> Example 1: this warns. According to the documentation, because
> strlen(src) could be >= strlen(dst) and therefore dst not
> NUL-terminated. However, the warning message could be improved to
> reflect that (if that is truly the reason we have this warning).
>
> extern char dst[12];
> extern char *src;
> void f(void) {
> // warning: 'strncpy' specified bound 12 equals destination size
> [-Wstringop-truncation]
> strncpy(dst, src, sizeof(dst));
> }
>
> Example 2: this does warn. It seems it is the same case as example 1,
> but now you know the actual (array) size of src so you can give more
> details. Still, I think in example 1 we should put the same
> explanation as here: i.e. something like "if len(src) >= 12, then dst
> might truncated", no? (assuming I am understanding why you warn on
> Example 1).
>
> extern char dst[12];
> extern char src[13];
> void f(void) {
> // warning: 'strncpy' output may be truncated copying 12 bytes from a
> string of length 12 [-Wstringop-truncation]
> strncpy(dst, src, sizeof(dst));
> }
My response was:
I'm not sure off the top of my head what more to say but let me see if I can
come up with better/clearer wording, maybe in a note.
In Example 2, we warn for the same reason as in Example 1 where we know
the size of the source array. In Example 2 we don't, but we could certainly
reword the warning along similar lines. Let me think about that also.
>From gcc-bugs-return-615887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:18:54 2018
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Fri, 21 Sep 2018 18:25:00 -0000
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--- Comment #5 from eric-bugs at omnifarious dot org ---
Here is the problem, reduced to the simplest expression I could make:
-----
template <int x>
struct test_template {
static int size() { return x; }
};
constexpr int ce_strlen(char const *s)
{
int i = 0;
while (s[i]) ++i;
return i;
}
int joe()
{
constexpr int plen = ce_strlen(__PRETTY_FUNCTION__); // This works
test_template<plen> a; // This declaration is valid.
test_template<ce_strlen(__PRETTY_FUNCTION__)> b; // But this doesn't work?!
return a.size() + b.size();
}
------
Either the declaration/initialization of both plen and b should fail, or they
should both succeed. It makes no sense for one to work and the other to not.
>From gcc-bugs-return-615889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:26:45 2018
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Subject: [Bug c/87379] Warn about function pointer casts which differ in variadic-ness
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> Confirmed. The handling of variadic functions was discussed during the
> design of the -Wcast-function-type warning
> (https://gcc.gnu.org/ml/gcc-patches/2017-10/msg00131.html). The assumption
> was that such conversions may be common and the idea was to avoid warning
> when they're safe. I don't think the warning implementation considers the
> nuances between different ABIs. Rather than customizing the warning to each
> ABI it might be better to simply tighten it up across the board as suggested.
>
> Not sure if making the warning "smarter" by having it track pointer
> conversions across assignments (to detect incompatible function conversions
> via void*) is worth exploring. It would still not detect the problem in the
> dlsym() case (and others like it) but could lead to a fair amount of noise.
It might be worth making it a separate flag (-Wcast-variadic-function-type
perhaps?) that's enabled by -Wcast-function-type but can still be disabled from
it independently to help users focus on just one variety of warnings at a time
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 18:26:00 -0000
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--- Comment #21 from Jürgen Reuter <juergen.reuter at desy dot de> ---
In our functional test suite, the tests nlo_4, nlo_5, fks_res_1 and another
test are still failing, they lead to segmentation faults. This will be really
difficult to isolate, but maybe this is a different root cause!?
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #22 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #20)
> Paul, thanks for the fix, our code test suite is still running, most of the
> problems are solved, the unit test suite is completely good now, but there
> are certain functional tests failing. This will be really, really hard to
> give you a small reproducer. I reopened, you can decide whether you want it
> on this PR or a new one.
Hi Juergen,
Blast! I am afraid that I am now away on a small break in Wales for the next
week. I suggest that you revert to pre-r263916 or reverse patch r263916 to keep
yourself moving forward. I'll give your new problems my full attention when I
return.
I apologise for the inconvenience.
Paul
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 18:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #23 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #21)
> In our functional test suite, the tests nlo_4, nlo_5, fks_res_1 and another
> test are still failing, they lead to segmentation faults. This will be
> really difficult to isolate, but maybe this is a different root cause!?
Hi Juergen,
If it is a different root cause, reverting to pre-r263916 might be a good
first-order check.
I'll set up to run your testsuite when I am back.
Cheers
Paul
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #24 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Paul, enjoy your time in Wales. Maybe this other issue wasn't caused by r263916
but by something else (though it must have been also in the past 2-3 weeks).
What our functional tests do: they call a code generator (written in OCaml) to
generate Fortran code, compile it and link it into a dynamical library. This is
then run by the main program, does a Monte Carlo integration. I'll try to find
out as much as possible but my time is limited the next 1-2 weeks. On my
university computers I am working with older versions (5.4 mainly because of
Ubuntu 16), so no problem in my current work. I only follow the strategy on my
laptop to follow the gcc development closely to catch possible issues before
your official releases.
>From gcc-bugs-return-615893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:36:10 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 18:46:00 -0000
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--- Comment #25 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This is the part from the test-suite.log for the 4 failures, they are all in
one particular feature of our code, so I am pretty sure that this is only one
remaining open issue:
| Starting simulation for process 'nlo_4_p1'
| Simulate: using integration grids from file 'nlo_4_p1.m1.vg'
| Simulate: activating fixed-order NLO events
| QCD alpha: using a running strong coupling
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
Date: Fri, 21 Sep 2018 18:47:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Sep 21 18:45:59 2018
New Revision: 264489
URL: https://gcc.gnu.org/viewcvs?rev=264489&root=gcc&view=rev
Log:
PR c++/87372 - __func__ constexpr evaluation.
* constexpr.c (maybe_constant_init_1): Pass false for strict down to
cxx_eval_outermost_constant_expr.
* g++.dg/cpp1y/func_constexpr2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/func_constexpr2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #24 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Murat UrsavaÅŸ from comment #6)
> Hi Jonathan,
>
> I just wanted a dramatic entrance :) (There was a discussion about GCC
> bugzilla on reddit recently)
Link to the reddit discussion? I searched and can't seem to find it.
>From gcc-bugs-return-615896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:53:32 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #26 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Jeurgen,
We are extremely pleased that you do follow developments on trunk. It
really helps to catch regressions early, while the changes are fresh
in mind :-)
Sometime, I would appreciate a briefing on what you are up to. I left
high energy theory when lattice QCD calculations were just starting.
Cheers
Paul
On 21 September 2018 at 19:32, juergen.reuter at desy dot de
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
>
> --- Comment #24 from Jürgen Reuter <juergen.reuter at desy dot de> ---
> Paul, enjoy your time in Wales. Maybe this other issue wasn't caused by r263916
> but by something else (though it must have been also in the past 2-3 weeks).
> What our functional tests do: they call a code generator (written in OCaml) to
> generate Fortran code, compile it and link it into a dynamical library. This is
> then run by the main program, does a Monte Carlo integration. I'll try to find
> out as much as possible but my time is limited the next 1-2 weeks. On my
> university computers I am working with older versions (5.4 mainly because of
> Ubuntu 16), so no problem in my current work. I only follow the strategy on my
> laptop to follow the gcc development closely to catch possible issues before
> your official releases.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
> You are the assignee for the bug.
>From gcc-bugs-return-615897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 18:56:41 2018
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Subject: [Bug c++/87372] [9 Regression] __PRETTY_FUNCTION__ not constexpr in gcc trunk on compiler explorer
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Fri, 21 Sep 2018 19:03:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
hmm...
Linux:
$ more lib.s
.file "lib.cc"
.text
.weak _ZN1AIiE6memberE
.section
.bss._ZN1AIiE6memberE,"awG",@nobits,_ZN1AIiE6memberE,comdat
.align 4
.type _ZN1AIiE6memberE, @gnu_unique_object
.size _ZN1AIiE6memberE, 4
Darwin:
$ more lib.s
.text
.globl __ZN1AIiE6memberE
.zerofill __DATA,__pu_bss2,__ZN1AIiE6memberE,4,2
.text
so... now to figure out why.
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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87384] New: Likely syntax error not reported as such
Date: Fri, 21 Sep 2018 19:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87384
Bug ID: 87384
Summary: Likely syntax error not reported as such
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jengelh at inai dot de
Target Milestone: ---
$ cat x.cpp
void (*f)(const char *, int &&...);
void g(const char *, int &&a, int &&b) {}
int main() { f = g; return 0; }
OBSERVED:
$ g++-8 -c x.cpp
x.cpp: In function ‘int main()’:
x.cpp:3:18: error: invalid conversion from ‘void (*)(const char*, int&&,
int&&)’ to ‘void (*)(const char*, int&&, ...)’ [-fpermissive]
int main() { f = g; return 0; }
EXPECTED:
That "int &&..." be reported as a syntax error of some kind. An argument pack
is normally only viable with a template, isn't it.
Using built-in specs.
COLLECT_GCC=g++-8
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/8 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-8 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic --build=x86_64-suse-linux
--host=x86_64-suse-linux
Thread model: posix
gcc version 8.2.1 20180831 [gcc-8-branch revision 264010] (SUSE Linux)
COLLECT_GCC_OPTIONS='-c' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib64/gcc/x86_64-suse-linux/8/cc1plus -quiet -v -D_GNU_SOURCE x.cpp
-quiet -dumpbase x.cpp -mtune=generic -march=x86-64 -auxbase x -version -o
/tmp/ccboFSGw.s
GNU C++14 (SUSE Linux) version 8.2.1 20180831 [gcc-8-branch revision 264010]
(x86_64-suse-linux)
compiled by GNU C version 8.2.1 20180831 [gcc-8-branch revision
264010], GMP version 6.1.2, MPFR version 4.0.1-p6, MPC version 1.1.0, isl
version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/8
/usr/include/c++/8/x86_64-suse-linux
/usr/include/c++/8/backward
/usr/lib64/gcc/x86_64-suse-linux/8/include
/usr/local/include
/usr/lib64/gcc/x86_64-suse-linux/8/include-fixed
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/include
/usr/include
End of search list.
GNU C++14 (SUSE Linux) version 8.2.1 20180831 [gcc-8-branch revision 264010]
(x86_64-suse-linux)
compiled by GNU C version 8.2.1 20180831 [gcc-8-branch revision
264010], GMP version 6.1.2, MPFR version 4.0.1-p6, MPC version 1.1.0, isl
version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 9a7181e015deb6ba65f2fa22664edb4d
>From gcc-bugs-return-615900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:17:12 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87384] Likely syntax error not reported as such
Date: Fri, 21 Sep 2018 19:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87384
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jan Engelhardt from comment #0)
> $ cat x.cpp
> void (*f)(const char *, int &&...);
> void g(const char *, int &&a, int &&b) {}
> int main() { f = g; return 0; }
>
> OBSERVED:
> $ g++-8 -c x.cpp
> x.cpp: In function ‘int main()’:
> x.cpp:3:18: error: invalid conversion from ‘void (*)(const char*, int&&,
> int&&)’ to ‘void (*)(const char*, int&&, ...)’ [-fpermissive]
> int main() { f = g; return 0; }
>
> EXPECTED:
> That "int &&..." be reported as a syntax error of some kind. An argument
> pack is normally only viable with a template, isn't it.
That's not a template parameter pack, it's a printf-style variadic function.
The comma before the ... is optional, so your code means exactly the same as:
void (*f)(const char *, int &&, ...);
void g(const char *, int &&a, int &&b) {}
int main() { f = g; return 0; }
And indeed that's exactly what the error message tells you.
>From gcc-bugs-return-615901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:34:50 2018
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From: "lennox at cs dot columbia.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87385] New: -Wmisleading-indentation shouldn't warn for labels
Date: Fri, 21 Sep 2018 19:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87385
Bug ID: 87385
Summary: -Wmisleading-indentation shouldn't warn for labels
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44736
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44736&action=edit
Test program that triggers the warning.
In the attached code, gcc gives a misleading-indentation warning for the label
in
if (input != NULL) free_subobj2(ret->obj2); FAIL3:
Since the if statement doesn't control whether a goto can actually go to the
label, I don't see how this indentation can be misleading.
$ gcc -Wall -c misleading-indentation-label.c
misleading-indentation-label.c: In function ‘alloc_object’:
misleading-indentation-label.c:46:2: warning: this ‘if’ clause does not
guard... [-Wmisleading-indentation]
if (input != NULL) free_subobj2(ret->obj2); FAIL3:
^~
misleading-indentation-label.c:46:47: note: ...this statement, but the latter
is misleadingly indented as if it were guarded by the ‘if’
if (input != NULL) free_subobj2(ret->obj2); FAIL3:
^~~~~
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.3.0-16ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --with-as=/usr/bin/x86_64-linux-gnu-as
--with-ld=/usr/bin/x86_64-linux-gnu-ld --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
>From gcc-bugs-return-615902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:46:37 2018
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From: "trashyankes at wp dot pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87386] New: Error message for static_assert show wrong range
Date: Fri, 21 Sep 2018 19:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87386
Bug ID: 87386
Summary: Error message for static_assert show wrong range
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: trashyankes at wp dot pl
Target Milestone: ---
Compiler output:
```
24 | static_assert(std::is_same<int, long>::value,"eee");
| ^~~
```
Range mark only `std` instead of whole expression. At least is should mark
`value`.
>From gcc-bugs-return-615903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:50:13 2018
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From: "fw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/81035] noreturn leads to worse code due to lack of sibcall optimization
Date: Fri, 21 Sep 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81035
--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
Author: fw
Date: Fri Sep 21 19:49:36 2018
New Revision: 264490
URL: https://gcc.gnu.org/viewcvs?rev=264490&root=gcc&view=rev
Log:
Document that attribute noreturn inhibits tail call optimization
PR middle-end/81035
* doc/extend.texi (Common Function Attributes): Mention that
noreturn suppresses tail call optimization.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
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Subject: [Bug c++/87386] Error message for static_assert show wrong range
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--- Comment #1 from trashyankes at wp dot pl ---
btw how reduce "Importance" of this bug?
Right now it have same level as bug that could break my code.
>From gcc-bugs-return-615905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:51:22 2018
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Subject: [Bug jit/64089] libgccjit.so.0.0.1 linkage failure on darwin
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--- Comment #21 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
I'm fine with Backporting for affected branches.
>From gcc-bugs-return-615906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:54:40 2018
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Subject: [Bug c/87387] New: runk/gcc/builtins.c:585:7: warning: explicitly assigning value of variable of type 'tree' (aka 'tree_node *') to itself [-Wself-assign]
Date: Fri, 21 Sep 2018 19:54:00 -0000
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Bug ID: 87387
Summary: runk/gcc/builtins.c:585:7: warning: explicitly
assigning value of variable of type 'tree' (aka
'tree_node *') to itself [-Wself-assign]
Product: gcc
Version: 8.0
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Source code is
if (code == ADDR_EXPR
&& TREE_CODE (TREE_OPERAND (rhs1, 0)) == ARRAY_REF)
rhs1 = rhs1;
svn blame says
264328 law if (code == ADDR_EXPR
264328 law && TREE_CODE (TREE_OPERAND (rhs1, 0)) == ARRAY_REF)
264328 law rhs1 = rhs1;
>From gcc-bugs-return-615907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 19:54:53 2018
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Subject: [Bug middle-end/81035] noreturn leads to worse code due to lack of sibcall optimization
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Florian Weimer <fw at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #4 from Florian Weimer <fw at gcc dot gnu.org> ---
Fixed in trunk.
>From gcc-bugs-return-615908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 20:07:20 2018
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From: "lennox at cs dot columbia.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87388] New: Feature request: header-only -Wc++-compat
Date: Fri, 21 Sep 2018 20:38:00 -0000
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Bug ID: 87388
Summary: Feature request: header-only -Wc++-compat
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I have C code with header files which also need to be included from C++ code.
I want the compiler to warn me if these header files aren't valid C++; however,
keeping the C source files C++-compatible leads to unnecessary complexity.
As an enhancement request, I'd like it to be possible for -Wc++-compat to warn
only for code in (non-system) header files.
>From gcc-bugs-return-615909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 20:38:27 2018
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From: "tobias.bruell at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87389] New: if constexpr not working properly with static_assert
Date: Fri, 21 Sep 2018 20:39:00 -0000
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Bug ID: 87389
Summary: if constexpr not working properly with static_assert
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Shouldn't the following compile? Also, if one replaces the hash_value_t by the
32-bit variant?
This is also rejected by Clang.
----------------------------------
#include <iostream>
//using hash_value_t = uint32_t;
using hash_value_t = uint64_t;
template<typename T, T v>
struct integer_ct {};
template<typename T, T v1, T v2>
constexpr bool operator == (integer_ct<T, v1>, integer_ct<T, v2>)
{
return (v1 == v2);
};
template<typename T, T v>
constexpr auto hash (integer_ct<T, v>)
{
return integer_ct<T, 2 * v> {};
}
int main ()
{
if constexpr (sizeof (hash_value_t) == 4)
{
static_assert (hash (integer_ct<hash_value_t, 0x80000001> {}) ==
integer_ct<hash_value_t, 0x00000002> {});
}
else if constexpr (sizeof (hash_value_t) == 8)
{
static_assert (hash (integer_ct<hash_value_t, 0x8000000000000001> {}) ==
integer_ct<hash_value_t, 0x0000000000000002> {});
}
}
>From gcc-bugs-return-615910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 20:39:45 2018
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Subject: [Bug libstdc++/87135] [C++17] unordered containers violate iterator validity requirements
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--- Comment #4 from François Dumont <fdumont at gcc dot gnu.org> ---
Author: fdumont
Date: Fri Sep 21 20:39:07 2018
New Revision: 264494
URL: https://gcc.gnu.org/viewcvs?rev=264494&root=gcc&view=rev
Log:
2018-09-21 François Dumont <fdumont@gcc.gnu.org>
PR libstdc++/87135
* src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
Use __builtin_floor to compute _M_next_resize.
* testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt.
* testsuite/23_containers/unordered_set/hash_policy/prime_rehash.cc:
Adapt.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/hashtable_c++0x.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/71181.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/prime_rehash.cc
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87030] GCC fails to build with Xcode 10, attempting an impossible multilib build
Date: Fri, 21 Sep 2018 21:15:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=87243
Ever confirmed|0 |1
--- Comment #13 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jeremy Huddleston Sequoia from comment #12)
> (In reply to Francois-Xavier Coudert from comment #11)
> > (In reply to Jeremy Huddleston Sequoia from comment #10)
> > > Given those, gcc only builds if we have the DevSDK ("headers at /" package)
> > > installed.
> >
> > I may be misunderstanding what you say: GCC builds and runs fine without the
> > headers in /usr/include. At Homebrew, we are not recommending users to
> > install the /usr/include headers package, and we build and run GCC fine. The
> > configuration is the following
> > (https://github.com/Homebrew/homebrew-core/blob/master/Formula/gcc.rb):
> >
> > --with-native-system-header-dir=/usr/include
> > --with-sysroot=/path/to/sdk
> >
> > if the system headers are in /path/to/sdk/usr/include. Thus, on a Mojave
> > installation with Xcode CLT installed, we set /path/to/sdk to
> > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
>
> Yeah, I documented the workaround of using --with-sysroot in the MacPorts
> port when filing these bugs and passed on to Homebrew, but that ends up
> causing gcc's search path to always look in that sysroot (ie, it becomes the
> default sysroot). Thus, users will build executables that behave
> differently based on where there SDK was located on their build system.
> That is certainly not what is desired. If you have a build fleet that used
> an SDK that was located at /Volumes/SDKs/AllMacSDKs/MacOSX10.14.sdk at build
> time, but your users have
> /Applications/MyXcodesPath/Xcode-10.app/.../MacOSX.sdk, then that mismatch
> can cause problems.
>
> The point of --with-sysroot is to change the behavior of the built product
> (the final gcc executable).
Right - this is pretty much the comment I made in 87243; --with-sysroot= sets
the default, which might not be the one implied by an xcode-select executed
later.
Of course, one *can* pass --sysroot=`xcrun blah blah` on any command line (for
the built compiler) as a work-around.
I was trying to work on a scheme where the possible SDK search paths were
provided by symlinks [in the user's home dir], with some configure-time
specified search order (including the option to search /). Initial population
of the symlinks might be time-significant - but subsequent following should be
less than a process switch. There was some email exchange on this between me,
Eric and Mike .. I will try to find it in my archives.
IMO we really don't want to go down the road where we launch another executable
for every sub-process invocation on the toolchain that needs to know the SDK
path!
> The point of --with-build-sysroot is to change
> how we build gcc.
Indeed --with-build-sysroot has some nasties - I did some work on it for darwin
when trying to get to a situation where we can configure for
"x86_64-apple-darwin" without that implying 10.0 ;)
Need to fish that out too.
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87270] "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Fri, 21 Sep 2018 21:19:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to Paul Thomas from comment #3)
> It seems that finalization has never occurred with any branch for this case,
I don't fully agree with this statement.
Apart from the fact that gfortran 8 with -O1 produces output like "cleanup:
check 1", it also seems that even trunk (in principle) calls the finalizer. At
least the output of -fdump-tree-original indicates that MAIN__ contains two
calls to '__final_module1_Class1', i.e. the finalization wrapper for the type
'class1', which in turn calls the actual finalizer routine.
Why an executable compiled with gfortran trunk does not show any of the output
from the final routine is not clear to me.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87386] [8/9 Regression] Error message for static_assert show wrong range
Date: Fri, 21 Sep 2018 21:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87386
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Known to work| |7.3.0
Summary|Error message for |[8/9 Regression] Error
|static_assert show wrong |message for static_assert
|range |show wrong range
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to trashyankes from comment #1)
> btw how reduce "Importance" of this bug?
You don't. That field doesn't matter.
>From gcc-bugs-return-615914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 21:21:53 2018
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Subject: [Bug c++/87386] [8/9 Regression] Error message for static_assert show wrong range
Date: Fri, 21 Sep 2018 21:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-21
Ever confirmed|0 |1
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Proper testcase that actually compiles:
#include <type_traits>
static_assert(std::is_same<int, long>::value,"eee");
87386.cc:2:15: error: static assertion failed: eee
2 | static_assert(std::is_same<int, long>::value,"eee");
|
Reduced testcase without header dependencies:
namespace foo {
template<typename> struct test { static constexpr bool value = false; };
}
static_assert(foo::test<int>::value, "eee");
87386.cc:4:15: error: static assertion failed: eee
4 | static_assert(foo::test<int>::value, "eee");
| ^~~
This is a regression, as GCC 7 highlighted the keyword 'static_assert' instead,
which makes more sense than just the first token of the condition:
87386.cc:4:1: error: static assertion failed: eee
static_assert(foo::test<int>::value, "eee");
^~~~~~~~~~~~~
>From gcc-bugs-return-615915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 21:25:59 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Fri, 21 Sep 2018 21:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #27 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Interesting: when I run with checking flags, I get the following error:
At line 532 of file evt_nlo.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array
'event_deps' (0/2)
However, I have been running also with these flags since ages, and this never
raised a problem!?
The problem seems indeed to happen in the module src/transforms/evt_nlo.f90
in the following
subroutine subroutine evt_nlo_setup_real_event_kinematics (evt,
process_instance)
class(evt_nlo_t), intent(inout) :: evt
type(process_instance_t), intent(in) :: process_instance
integer :: n_real, n_phs
integer :: i_real
print *, "inside evt_nlo_setup_real_event_kinematics"
associate (event_deps => evt%event_deps)
select type (pcm => process_instance%pcm)
class is (pcm_instance_nlo_t)
n_real = pcm%get_n_real ()
end select
print *, "n_real = ", n_real
i_real = evt%process%get_first_real_term ()
print *, "first real term = ", i_real
select type (phs => process_instance%term(i_real)%k_term%phs)
type is (phs_fks_t)
print *, "size (identif.) = ", size (phs%phs_identifiers)
event_deps%phs_identifiers = phs%phs_identifiers
end select
n_phs = size (event_deps%phs_identifiers)
print *, "n_phs = ", n_phs
call event_deps%p_real_cms%init (n_real, n_phs)
print *, "init p_real_cms"
call event_deps%p_real_lab%init (n_real, n_phs)
print *, "init p_real_lab"
select type (pcm => process_instance%pcm)
type is (pcm_instance_nlo_t)
select type (config => pcm%config)
type is (pcm_nlo_t)
if (allocated (config%region_data%alr_contributors)) then
allocate (event_deps%contributors (size
(config%region_data%alr_contributors)))
event_deps%contributors = config%region_data%alr_contributors
print *, size (config%region_data%alr_contributors)
end if
if (allocated (config%region_data%alr_to_i_contributor)) then
allocate (event_deps%alr_to_i_con &
(size (config%region_data%alr_to_i_contributor)))
event_deps%alr_to_i_con =
config%region_data%alr_to_i_contributor
end if
end select
end select
end associate
end subroutine evt_nlo_setup_real_event_kinematics
>From gcc-bugs-return-615916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 21:31:37 2018
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Subject: [Bug c++/87386] [8/9 Regression] Error message for static_assert show wrong range
Date: Fri, 21 Sep 2018 21:35:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Started with r255255
C++: improve location of static_assert errors
gcc/cp/ChangeLog:
* parser.c (cp_parser_unary_expression): Generate a location for
"noexcept".
(cp_parser_trait_expr): Generate and return a location_t,
converting the return type from tree to cp_expr.
(cp_parser_static_assert): Pass location of the condition to
finish_static_assert, rather than that of the "static_assert"
token, where available.
>From gcc-bugs-return-615917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 21:35:01 2018
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Subject: [Bug c++/87386] [8/9 Regression] Error message for static_assert show wrong range
Date: Fri, 21 Sep 2018 21:38:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It would be better to highlight the whole condition:
87386.cc:4:15: error: static assertion failed: eee
4 | static_assert(foo::test<int>::value, "eee");
| ^~~~~~~~~~~~~~~~~~~~~
Which is what already happens for a more complex expression:
namespace foo {
template<typename> struct test { static constexpr bool value = false; };
}
static_assert(foo::test<int>::value && true, "");
87386.cc:4:37: error: static assertion failed
4 | static_assert(foo::test<int>::value && true, "");
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
>From gcc-bugs-return-615918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 21:38:26 2018
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Subject: [Bug c++/87389] if constexpr not working properly with static_assert
Date: Fri, 21 Sep 2018 21:40:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is ill-formed.
if constexpr in main() doesn't work the way you want, because there's nothing
dependent (there is no possible version of the code where the condition will be
true, so the program is ill-formed).
>From gcc-bugs-return-615920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 23:57:36 2018
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Subject: [Bug driver/29931] following argv[0] symlink in process_command breaks symlinked-together toolchain
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #10 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Harald van Dijk from comment #9)
> (In reply to Eric Gallager from comment #6)
> > (In reply to Jorn Wolfgang Rennecke from comment #4)
> > > The bug is not fixed; the gcc.c patch has not been reviewed.
> >
> > What about now, after r169891?
>
> That was only checked in on a Google branch, so this is not fixed,
> regardless of the below.
>
> The check-in applies almost cleanly to GCC 8.2.0, but actually testing it, I
> find that it does not work in my test case. I suppose it would work when all
> files are put together in a single directory, but that's not the only way
> symlinks can be used. I installed packages with DESTDIR into separate
> directories, and installed symlinks to the files in each of those using cp
> -rs. When the code checks whether spec_machine can be found, it correctly
> sees that it can be: GCC is one of the packages that provides that
> directory. As a result, -canonical-prefixes is used. However, it cannot find
> anything from binutils or glibc there, so things still break.
OK, reopening then
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Subject: [Bug c++/87389] if constexpr not working properly with static_assert
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Specifically, the not-taken branch of an if constexpr is only discarded when
inside a template. In a non-template both branches are compiled as normal, and
so both static assertions get compiled. Since both cannot possibly be true at
once, the program can never compile.
>From gcc-bugs-return-615921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 21 23:57:37 2018
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Subject: [Bug other/29842] [meta-bug] outstanding patches / issues from STMicroelectronics
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Bug 29842 depends on bug 29931, which changed state.
Bug 29931 Summary: following argv[0] symlink in process_command breaks symlinked-together toolchain
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29931
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
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Subject: [Bug target/87358] ICE when -mtune=thunderx2t99 applied
Date: Sat, 22 Sep 2018 03:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87358
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a reduced testcase:
void f(unsigned char timestamp, unsigned char * a)
{
while (1)
{
int check = (timestamp && *a);
if (__builtin_expect((check == 0),1)) continue;
}
}
---- CUT ---
Compile with -O3 -mcpu=thunderx2t99 .
NOTE I can't reproduce it with a NON-UBUNTU GCC 7.3.0.
Please report this to Ubuntu instead.
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Subject: [Bug c++/78157] Incorrect diagnostic for variable template declaration
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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Subject: [Bug c++/80681] missing -Wuninitialized for const or reference member of a private base class
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |manu at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing Manu since he is pretty knowledgeable about -Wuninitialized
>From gcc-bugs-return-615925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 03:18:44 2018
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Subject: [Bug tree-optimization/81809] missing -Wuninitialized due to alias analysis limitation
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
-Wuninitialized bug => cc-ing Manu
>From gcc-bugs-return-615926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 03:32:41 2018
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Subject: [Bug c++/69697] incorrect runtime initialization of static flexible array members
Date: Sat, 22 Sep 2018 03:38:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> Confirming. To make things worse, the program output changes between -O0
> and -O1:
>
> $ (for o in 0 1 2 3; do gcc -O$o -Wall -Wextra y.C && ./a.out; done)
> i = 0, j = 3, a = { 2, { 3, 4, } }
> i = 3, j = 0, a = { 2, { 3, 4, } }
> i = 3, j = 0, a = { 2, { 3, 4, } }
> i = 3, j = 0, a = { 2, { 3, 4, } }
I tested some additional optimization levels; -O0 is still the only different
one:
$ (for o in 0 1 2 3 g s fast; do /usr/local/bin/gcc -O${o} -Wall -Wextra
-std=c++14 -xc++ -o 69697_O${o}.exe 69697.c && printf "./69697_O${o}.exe: " &&
./69697_O${o}.exe; done)
./69697_O0.exe: i = 0, j = 3, a = { 2, { 3, 4, } }
./69697_O1.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
./69697_O2.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
./69697_O3.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
./69697_Og.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
./69697_Os.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
./69697_Ofast.exe: i = 3, j = 0, a = { 2, { 3, 4, } }
>From gcc-bugs-return-615927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 03:38:58 2018
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Subject: [Bug lto/41767] assertion in tree-sra.c
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |SUSPENDED
--- Comment #13 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #12)
> (In reply to Eric Gallager from comment #11)
> > (In reply to Richard Biener from comment #10)
> > > I will give the situation a more detailed look later (but yes, I believe this
> > > is invalid input to LTO). Let's defer a solution a bit.
> >
> > Has it been deferred long enough yet?
>
> WAITING on a reply
Actually I guess SUSPENDED makes more sense if no one is working on it
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Subject: [Bug rtl-optimization/41299] code size regression (from 4.3) with -Os and -mregparm=3
Date: Sat, 22 Sep 2018 03:52:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Last reconfirmed|2009-09-09 22:35:37 |2018-9-21
Known to fail| |4.2.1, 9.0
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirming that the size is still 70 with gcc trunk, but that's actually an
improvement over Apple's gcc-4.2:
$ /usr/local/bin/gcc -c -Os -mregparm=3 -m32 41299.c
$ size 41299.o
__TEXT __DATA __OBJC others dec hex
70 0 0 0 70 46
$ /usr/bin/gcc -c -Os -mregparm=3 -m32 41299.c
$ size 41299.o
__TEXT __DATA __OBJC others dec hex
149 0 0 4 153 99
$
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Subject: [Bug target/46524] Code size regression due to not reusing immediate operands of moves
Date: Sat, 22 Sep 2018 03:53:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> (In reply to Eric Gallager from comment #1)
> > gcc 4.3 is old; does this still happen with more recent versions?
>
> Putting in WAITING until there's a reply
No reply; since there's no compile command given to reproduce, I can't do
anything to confirm, so I'm going to close this.
>From gcc-bugs-return-615930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 03:53:41 2018
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Subject: [Bug c++/37949] static initialisation through pointer deferred until run time
Date: Sat, 22 Sep 2018 03:56:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |SUSPENDED
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Paolo Carlini from comment #4)
> > Honza, is there any progress on this?
>
> WAITING on a response
Actually I guess SUSPENDED is more appropriate if it's confirmed, but no one's
making progress on it
>From gcc-bugs-return-615931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 03:56:35 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/41299] code size regression (from 4.3) with -Os and -mregparm=3
Date: Sat, 22 Sep 2018 04:16:00 -0000
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>From gcc-bugs-return-615932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 04:16:09 2018
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From: "murat.ursavas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Sat, 22 Sep 2018 04:24:00 -0000
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--- Comment #25 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
(In reply to Eric Gallager from comment #24)
> (In reply to Murat UrsavaÅŸ from comment #6)
> > Hi Jonathan,
> >
> > I just wanted a dramatic entrance :) (There was a discussion about GCC
> > bugzilla on reddit recently)
>
> Link to the reddit discussion? I searched and can't seem to find it.
I've found it via twitter. Here;
https://twitter.com/blelbach/status/1032586866162196481
>From gcc-bugs-return-615933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 04:24:58 2018
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From: "murat.ursavas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Sat, 22 Sep 2018 07:52:00 -0000
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--- Comment #26 from Murat UrsavaÅŸ <murat.ursavas at gmail dot com> ---
(In reply to Richard Earnshaw from comment #21)
> (In reply to Murat UrsavaÅŸ from comment #20)
> > By the way, the hardware peripheral registers are aligned to 32bits.
>
> So why don't you define your struct as
>
> struct TestStructType
> {
> volatile unsigned one;
> unsigned char two;
> unsigned short three __attribute__((packed));
> };
>
> And get rid of the pragma entirely?
Richard,
Some of the structs are not under my control, since they belong to manufacturer
libraries. I need pack-1 for some due to storage and communication needs.
And I didn't know that I could pack individual struct members. Please correct
me if I'm wrong. This structs size is total 10 bytes, one:4, two:4 and three:2,
right?
>From gcc-bugs-return-615934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 07:52:08 2018
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From: "paul.richard.thomas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87270] "FINAL" subroutine is called when compiled with "gfortran -O1", but not "gfortran -O0"
Date: Sat, 22 Sep 2018 09:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87270
--- Comment #5 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Hi Janus,
That's wierd. I don't see any final call output with any of the
branches, going back to 6-branch.
I am also puzzled by the lack of calls, given that the finalization
wrapper appears in the tree dump.
I have marked this thread as "unread" so that I can pick this up when
I return from my week's break in Wales.
Regards
Paul
On 21 September 2018 at 22:15, janus at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87270
>
> --- Comment #4 from janus at gcc dot gnu.org ---
> (In reply to Paul Thomas from comment #3)
>> It seems that finalization has never occurred with any branch for this case,
>
> I don't fully agree with this statement.
>
> Apart from the fact that gfortran 8 with -O1 produces output like "cleanup:
> check 1", it also seems that even trunk (in principle) calls the finalizer. At
> least the output of -fdump-tree-original indicates that MAIN__ contains two
> calls to '__final_module1_Class1', i.e. the finalization wrapper for the type
> 'class1', which in turn calls the actual finalizer routine.
>
> Why an executable compiled with gfortran trunk does not show any of the output
> from the final routine is not clear to me.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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Subject: [Bug target/87358] ICE when -mtune=thunderx2t99 applied
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It happens during the scheduler pass.
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Subject: [Bug c/87388] Feature request: header-only -Wc++-compat
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Seems like you could do this yourself.
Have one C file which just includes each header you want to test and compile
with -Wc++-compat only on that one C file.
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Subject: [Bug c/87388] Feature request: header-only -Wc++-compat
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Another way to do this is just have one C++ source file which just includes
that header file to be able to test them.
I don't see this feature request that useful really except to make GCC more
complex.
>From gcc-bugs-return-615938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 09:26:11 2018
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Subject: [Bug fortran/77325] ICE in gimplify_var_or_parm_decl, at gimplify.c:1933
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
I had better take it so that I can keep track of backports to 8-branch.
Paul
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Subject: [Bug fortran/87151] allocating array of character
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
I am onto deferred character bugs right now so I will take this one :-)
Paul
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Subject: [Bug target/87358] ICE when -mtune=thunderx2t99 applied
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
0xe097f3 crash_signal
../../gcc/toplev.c:337
0x11cf280 aarch_macro_fusion_pair_p
../../gcc/config/aarch64/aarch64.c:14434
0x161221b sched_macro_fuse_insns
../../gcc/sched-deps.c:2869
0x161245f sched_analyze_insn
../../gcc/sched-deps.c:2907
0x1614ab7 deps_analyze_insn(deps_desc*, rtx_insn*)
../../gcc/sched-deps.c:3691
0x1615117 sched_analyze(deps_desc*, rtx_insn*, rtx_insn*)
../../gcc/sched-deps.c:3842
0xd96fe3 compute_block_dependences
../../gcc/sched-rgn.c:2721
0xd996a7 sched_rgn_compute_dependencies(int)
../../gcc/sched-rgn.c:3347
0xd9890b schedule_region
../../gcc/sched-rgn.c:3103
0xd99ee7 schedule_insns()
../../gcc/sched-rgn.c:3506
0xd9ab97 rest_of_handle_sched
../../gcc/sched-rgn.c:3710
0xd9ad77 execute
../../gcc/sched-rgn.c:3818
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Happens on the Linaro toolchain branch.
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Subject: [Bug fortran/85603] ICE with character array substring assignment
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Hi Walt,
I am on a roll with deferred length string bugs so I will take this one.
I already have a fix for it which I will transmit to the list in the next few
days. (I am just setting off for a 'break' in Wales. Both my wife and daughter
have work to do so I might as well join them:-) )
Paul
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87390
Bug ID: 87390
Summary: GCC does not honor FLT_EVAL_METHOD on implicit
conversion of integer to floating point
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
Target Milestone: ---
On 32-bit x86, i.e. with FLT_EVAL_METHOD = 2, the following program
#include <stdio.h>
#include <float.h>
int main (void)
{
unsigned long long i = 1ULL << 63;
double d;
d = i;
printf ("FLT_EVAL_METHOD = %d\n", (int) FLT_EVAL_METHOD);
printf ("%d\n", d + 1.0 == (float) d + (float) 1.0);
printf ("%d\n", d == (float) d + (float) 1.0);
printf ("%d\n", d == i + 1);
return 0;
}
gives:
cventin:~> gcc-snapshot -std=c99 tst.c -o tst -m32
cventin:~> ./tst
FLT_EVAL_METHOD = 2
1
0
1
instead of 0 for the last line. Indeed, according to ISO C99 5.2.4.2.2:
Except for assignment and cast (which remove all extra range and precision),
the values of operations with floating operands and values subject to the
usual arithmetic conversions and of floating constants are evaluated to a
format whose range and precision may be greater than required by the type.
The use of evaluation formats is characterized by the implementation-defined
value of FLT_EVAL_METHOD:
[...]
2 evaluate all operations and constants to the range and precision of the
long double type.
(slightly changed in C11: "[...] the values yielded by operators with [...]").
For the first two tests, (float) d + (float) 1.0 has type float and has been
evaluated with the type long double, and for the == test, this expression is
converted to the semantic type double (because the left-hand side has type
double), but the evaluation type is long double, thus the results 1 and 0
respectively.
For the third test, i + 1 has type unsigned long long, and for the == test,
similarly, this expression should be converted to the semantic type double, but
the evaluation type should be long double, thus the result should be 0, like in
the second test, not 1.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Sat, 22 Sep 2018 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #28 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I am trying to install a clean whizard-2.6.4 on x86_64-apple-darwin17, Xcode
9.4.1, SIP disabled, gfortran 8.2, ocaml 4.03.0. I got the following errors
with make check:
FAIL: mci_vamp.run
FAIL: integrations.run
FAIL: simulations.run
FAIL: integrations_history.run
============================================================================
Testsuite summary for WHIZARD 2.6.4
============================================================================
# TOTAL: 125
# PASS: 113
# SKIP: 8
# XFAIL: 0
# FAIL: 4
# XPASS: 0
# ERROR: 0
FAIL: empty.run
FAIL: fatal.run
FAIL: structure_1.run
...
FAIL: pythia6_1.run
FAIL: pythia6_2.run
FAIL: pythia6_3.run
...
==========================================================
WHIZARD 2.6.4: tests/functional_tests/test-suite.log
==========================================================
# TOTAL: 277
# PASS: 1
# SKIP: 38
# XFAIL: 2
# FAIL: 235
# XPASS: 1
# ERROR: 0
The later seems due to
*** FATAL ERROR: Option '--logfile' needs a value
Is this expected?
What is the recommended way to change the fortran compiler?
>From gcc-bugs-return-615944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 09:54:11 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Sat, 22 Sep 2018 09:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #29 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Dominique d'Humieres from comment #28)
> I am trying to install a clean whizard-2.6.4 on x86_64-apple-darwin17, Xcode
> 9.4.1, SIP disabled, gfortran 8.2, ocaml 4.03.0. I got the following errors
> with make check:
>
> FAIL: mci_vamp.run
> FAIL: integrations.run
> FAIL: simulations.run
> FAIL: integrations_history.run
> ============================================================================
> Testsuite summary for WHIZARD 2.6.4
> ============================================================================
> # TOTAL: 125
> # PASS: 113
> # SKIP: 8
> # XFAIL: 0
> # FAIL: 4
> # XPASS: 0
> # ERROR: 0
This is really strange, is that after Paul's fix?
>
> FAIL: empty.run
> FAIL: fatal.run
> FAIL: structure_1.run
> ...
> FAIL: pythia6_1.run
> FAIL: pythia6_2.run
> FAIL: pythia6_3.run
> ...
> ==========================================================
> WHIZARD 2.6.4: tests/functional_tests/test-suite.log
> ==========================================================
>
> # TOTAL: 277
> # PASS: 1
> # SKIP: 38
> # XFAIL: 2
> # FAIL: 235
> # XPASS: 1
> # ERROR: 0
>
> The later seems due to
>
> *** FATAL ERROR: Option '--logfile' needs a value
>
> Is this expected?
>
> What is the recommended way to change the fortran compiler?
This seems to be a hiccup with the I/O. Did you use gcc or clang as the
underlying C compiler? I use GNU gcc, g++ and gfortran as underlying compilers,
I don't have to specify them because they are all in the dominant paths. When
you build WHIZARD, you specify they compilers by ../configure
FC=<path-to-gfortran/gfortran> CC=<path-to-gcc/gcc> CXX=<...> FCFLAGS=<...>
(optional F77=<...>, we have some legacy code from our field included).
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #30 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> This is really strange, is that after Paul's fix?
It is with gfortran 8.2 (from fink).
> This seems to be a hiccup with the I/O. Did you use gcc or clang
> as the underlying C compiler?
I use gcc.
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Sat, 22 Sep 2018 10:08:00 -0000
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--- Comment #31 from Jürgen Reuter <juergen.reuter at desy dot de> ---
That is really strange, I never used fink, I use macports. But not for gcc, I
always compile them by myself on MACOSX. Clearly the C/Fortran I/O doesn't work
properly, the string parsing doesn't work properly in the main.f90 file of
WHIZARD, to be found in src/whizard-core. The PGI compiler had this problem for
1-2 years with our code. We are testing our code in a CI with gcc-8.2,
everything is fine there. I don't know whether the fink build is ok, though.
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Subject: [Bug target/87358] ICE when -mtune=thunderx2t99 applied
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://bugs.linaro.org/sho
| |w_bug.cgi?id=4007
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note I filed this with Linaro now:
https://bugs.linaro.org/show_bug.cgi?id=4007
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Subject: [Bug fortran/85603] ICE with character array substring assignment
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sat Sep 22 10:21:25 2018
New Revision: 264502
URL: https://gcc.gnu.org/viewcvs?rev=264502&root=gcc&view=rev
Log:
2018-09-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85603
* trans-array.c (gfc_alloc_allocatable_for_assignment): Test
the charlen backend_decl before using the VAR_P macro.
2018-09-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/85603
* gfortran.dg/deferred_character_23.f90 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/deferred_character_23.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80681] missing -Wuninitialized for const or reference member of a private base class
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This should be easy to do since at the point of warning (which happens in the
FE), all information needed is available.
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Subject: [Bug c++/83468] -Wuninitialized false negative (reference, VOPs at O0, Wsystem-headers)
Date: Sat, 22 Sep 2018 10:46:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|-Wuninitialized warning not |-Wuninitialized false
|emitted when it should |negative (reference, VOPs
| |at O0, Wsystem-headers)
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
It should warn at -O0 for passing q to test2, specially because there is no
inlining. Simpler testcase:
class klass
{
public: void test2(double k);
public: void test3(double& k);
};
int main(int argc, const char** argv)
{
double q;
klass* ptr;
ptr = new klass();
ptr->test2(q);
ptr->test3(q);
ptr->test2(q);
}
It warns if one removes the call to test3. This is because we don't handle VOPs
in they early pass and the call to test3 converts q to one.
There's also the other issue with inlining code from Wsystem-headers.
>From gcc-bugs-return-615951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 10:46:02 2018
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Subject: [Bug c/87388] Feature request: header-only -Wc++-compat
Date: Sat, 22 Sep 2018 10:47:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Yes, this doesn't seem to be something that GCC can do easily, while the user
can do it trivially. Rather than having this bug open for the next 10 years, it
is better to be honest about it.
>From gcc-bugs-return-615952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 10:47:30 2018
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Subject: [Bug target/87358] ICE when -mtune=thunderx2t99 applied
Date: Sat, 22 Sep 2018 11:05:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Moved to linaro as it was fixed by:
commit 2988c5dac284abf7d3c7725daf481c69fe4452ad
Author: pinskia <pinskia@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Jul 7 22:52:12 2017 +0000
2017-07-07 Andrew Pinski <apinski@cavium.com>
* config/aarch64/aarch64.c (aarch_macro_fusion_pair_p): Check
prev_set and curr_set for AARCH64_FUSE_ALU_BRANCH.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250068
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug c/87390] [x86 32bit only] GCC does not honor FLT_EVAL_METHOD on implicit conversion of integer to floating point
Date: Sat, 22 Sep 2018 12:32:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |i?86-*-*
Summary|GCC does not honor |[x86 32bit only] GCC does
|FLT_EVAL_METHOD on implicit |not honor FLT_EVAL_METHOD
|conversion of integer to |on implicit conversion of
|floating point |integer to floating point
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Not much people care about 32bit x86 any more ...
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Subject: [Bug target/86798] nds32 port needs updating for CVE-2017-5753
Date: Sat, 22 Sep 2018 12:34:00 -0000
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--- Comment #2 from Chung-Ju Wu <jasonwucj at gcc dot gnu.org> ---
Author: jasonwucj
Date: Sat Sep 22 12:30:50 2018
New Revision: 264503
URL: https://gcc.gnu.org/viewcvs?rev=264503&root=gcc&view=rev
Log:
PR target/86798
* config/nds32/nds32.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
Define to speculation_safe_value_not_needed.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/nds32/nds32.c
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Subject: [Bug target/86798] nds32 port needs updating for CVE-2017-5753
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Chung-Ju Wu <jasonwucj at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Chung-Ju Wu <jasonwucj at gcc dot gnu.org> ---
Fixed on the trunk.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
Date: Sat, 22 Sep 2018 14:56:00 -0000
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Bug 86772 depends on bug 86798, which changed state.
Bug 86798 Summary: nds32 port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86798
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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From: "asb at lowrisc dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87391] New: [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
Date: Sat, 22 Sep 2018 14:59:00 -0000
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Bug ID: 87391
Summary: [RISCV] -march=rv32i -mabi=ilp32e is erroneously
accepted
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asb at lowrisc dot org
Target Milestone: ---
The current ABI docs state that the RV32E calling convention (-mabi=ilp32e) may
only be used with the RV32E ISA (-march=rv32e). GCC does not produce an error
for -march=rv32i -mabi=ilp32e, but it seems that it does ignore the ABI
argument and use the ilp32e ABI anyway. I would expect GCC to produce an error
instead.
$ cat foo.c
int foo(int a, int b, int c, int d, int e, int f, int g);
int bar() {
return foo(1, 2, 3, 4, 5, 6, 7);
}
$ ./riscv32-unknown-elf-gcc -march=rv32i -mabi=ilp32 foo.c -S -o -
.file "foo.c"
.option nopic
.text
.align 2
.globl bar
.type bar, @function
bar:
addi sp,sp,-16
sw ra,12(sp)
sw s0,8(sp)
addi s0,sp,16
li a6,7
li a5,6
li a4,5
li a3,4
li a2,3
li a1,2
li a0,1
call foo
mv a5,a0
mv a0,a5
lw ra,12(sp)
lw s0,8(sp)
addi sp,sp,16
jr ra
.size bar, .-bar
.ident "GCC: (GNU) 9.0.0 20180922 (experimental)"
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Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
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--- Comment #1 from Alex Bradbury <asb at lowrisc dot org> ---
Apologies I pasted the wrong command output in the original report. The
invocation demonstrating the bug is below:
$ ./riscv32-unknown-elf-gcc -march=rv32i -mabi=ilp32e foo.c -S -o -
.file "foo.c"
.option nopic
.text
.align 2
.globl bar
.type bar, @function
bar:
addi sp,sp,-16
sw ra,12(sp)
sw s0,8(sp)
addi s0,sp,16
li a6,7
li a5,6
li a4,5
li a3,4
li a2,3
li a1,2
li a0,1
call foo
mv a5,a0
mv a0,a5
lw ra,12(sp)
lw s0,8(sp)
addi sp,sp,16
jr ra
.size bar, .-bar
.ident "GCC: (GNU) 9.0.0 20180922 (experimental)"
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/58557] [OOP] Issues with CLASS/TYPE functions in array constructors: reject valid, memory leaks, invalid free
Date: Sat, 22 Sep 2018 15:23:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to janus from comment #3)
> Here is a 'corrected' version of the test case:
>
> [...]
>
> which yields with 4.9 trunk:
>
> c0.f90:51:0: internal compiler error: in
> gfc_trans_array_constructor_subarray, at fortran/trans-array.c:1472
> b = [ f_class_array(1) ]
The ICE is gone since version 7.
The only problems that might still be existing are the memory leaks mentioned
in comment 0 (haven't checked).
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/63535] SELECT TYPE shouldn't pass ALLOCATABLE/POINTER attribute through
Date: Sat, 22 Sep 2018 17:20:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |janus at gcc dot gnu.org
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Tobias Burnus from comment #0)
> Quoting Wolfgang Kilian:
>
> "The attributes of the associating entity are listed in 8.1.3.3 of the
> F2008 standard. (Maybe some other clauses also apply.) The ALLOCATABLE
> attribute is not among the possible attributes for the associating
> entity. (Neither is POINTER.)"
I'm not completely sure if section 8.1.3.3 ("Attributes of associate names")
actually applies to the given example, since the SELECT TYPE statement does not
actually contain an associate name.
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Subject: [Bug middle-end/41453] use INTENT(out) for optimization
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Ever confirmed|0 |1
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I tried adding clobbers both on the caller's side and the
callee's side.
One problem was that with
Index: trans-decl.c
===================================================================
--- trans-decl.c (Revision 264487)
+++ trans-decl.c (Arbeitskopie)
@@ -47,6 +47,8 @@ along with GCC; see the file COPYING3. If not see
#include "gomp-constants.h"
#include "gimplify.h"
+#include "print-tree.h"
+
#define MAX_LABEL_VALUE 99999
@@ -4065,7 +4067,9 @@ gfc_init_default_dt (gfc_symbol * sym, stmtblock_t
/* Initialize INTENT(OUT) derived type dummies. As well as giving
them their default initializer, if they do not have allocatable
- components, they have their allocatable components deallocated. */
+ components, they have their allocatable components deallocated. Also,
+ this is used as a convenient place to clobber scalar INTENT(OUT)
+ variables on procedure entry. */
static void
init_intent_out_dt (gfc_symbol * proc_sym, gfc_wrapped_block * block)
@@ -4143,6 +4147,25 @@ init_intent_out_dt (gfc_symbol * proc_sym, gfc_wra
gfc_add_expr_to_block (&init, tmp);
}
+ else if (!proc_sym->attr.elemental
+ && f->sym && f->sym->attr.dummy && f->sym->attr.intent ==
INTENT_OUT
+ && f->sym->attr.dimension == 0 && f->sym->attr.codimension == 0
+ && !f->sym->attr.allocatable && f->sym->ts.type != BT_CHARACTER
+ && f->sym->ts.type != BT_CLASS && f->sym->ts.type != BT_DERIVED)
+ {
+ tree var, clobber;
+ var = build_fold_indirect_ref_loc (input_location,
f->sym->backend_decl);
+ fprintf(stderr,"\nbackend_decl:\n");
+ debug_tree (f->sym->backend_decl);
+ fprintf(stderr,"\nvar:\n");
+ debug_tree (var);
+ fprintf(stderr,"\nDECL_SIZE(var)\n");
+ debug_tree (DECL_SIZE(var));
+ clobber = build_clobber (TREE_TYPE (var));
+ fprintf(stderr,"\nclobber:\n");
+ debug_tree (clobber);
+ gfc_add_modify (&init, var, clobber);
+ }
gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
}
(minus the debuggin statements, if you want) I got ICEs during
gimplification if the procedure had contained procedures.
It appears that whatever build_fold_indirect_ref_loc from
a reference argument cannot be used because DECL_SIZE cannot
be used on var.
A failing test case for this would be
subroutine foo (outv)
integer, intent(out) :: outv
contains
subroutine bar
end subroutine bar
end subroutine foo
I am not sure if this is a middle end bug, or that we are somehow
abusing something in the middle end.
Anyway, I will start by submiting the part that works.
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Subject: [Bug target/86340] GCC 8.1 produces broken code for m68k with optimization levels above -O1
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Mikael Pettersson <mikpelinux at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |mikpelinux at gmail dot com
--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Created attachment 44737
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44737&action=edit
reduced test case
With this reduced test case I get the same code as for the unreduced one, with
a cross to m68k-linux with options -fomit-frame-pointer -Os -Wall.
The test case receives parameters via hard registers in a way that looks
questionable to me. Changing it to normal parameter passing avoids the wrong
code.
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
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--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sat Sep 22 17:49:19 2018
New Revision: 264505
URL: https://gcc.gnu.org/viewcvs?rev=264505&root=gcc&view=rev
Log:
2018-09-22 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR fortran/87318
* gfortran.dg/dtio_1.f90: Update test to valid code.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/dtio_1.f90
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Subject: [Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug fortran/84094] several correctness issues in gfortran.dg
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Bug 84094 depends on bug 87318, which changed state.
Bug 87318 Summary: gfortran.dg/dtio_1.f90 is invalid
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87318
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/65677] Incomplete assignment on deferred-length character variable
Date: Sat, 22 Sep 2018 18:44:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Hi John,
I appreciate that it is probably three and a half years too late but here is a
workaround:
replace
text = string
text = ADJUSTL(text(2:)) !***
with
allocate (text, source = ADJUSTL(string(2:)))
I am working on deferred string problems and so hope to have this one fixed in
the next few days.
Thank you for submitting this problem. I have poked at it several times since
submission but didn't find a solution. This time I am rather more determined.
Paul
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Subject: [Bug fortran/64120] [F03] Wrong handling of allocatable character string
Date: Sat, 22 Sep 2018 18:44:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
The first test now works fine on trunk. The second does if the 'save' is
commented out.
Paul
>From gcc-bugs-return-615968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 18:45:02 2018
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Subject: [Bug middle-end/41453] use INTENT(out) for optimization
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Sep 22 18:44:01 2018
New Revision: 264506
URL: https://gcc.gnu.org/viewcvs?rev=264506&root=gcc&view=rev
Log:
2018-09-22 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/41453
* trans.h (gfc_conv_expr_reference): Add optional argument
add_clobber to prototype.
(gfc_conv_procedure_call): Set add_clobber argument to
gfc_conv_procedure_reference to true for scalar, INTENT(OUT),
non-pointer, non-allocatable, non-dummy variables whose type
is neither BT_CHARACTER, BT_DERIVED or BT_CLASS, but only if
the procedure is not elemental.
* trans-expr.c (gfc_conv_procedure_reference): Add clobber
statement before call if add_clobber is set.
2018-09-22 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/41453
* gfortran.dg/intent_optimize_2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_optimize_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-615969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 19:14:54 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Sat, 22 Sep 2018 21:49:00 -0000
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--- Comment #32 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Paul, I found a workaround: in lines 530-533 in the file
src/transforms/evt_nlo.f90 there is an assignment of an allocatable array of
different DT components which apparently doesn't work any more. Changing
530 select type (phs => process_instance%term(i_real)%k_term%phs)
531 type is (phs_fks_t)
532 event_deps%phs_identifiers = phs%phs_identifiers
533 end select
into
530 select type (phs => process_instance%term(i_real)%k_term%phs)
531 type is (phs_fks_t)
532 allocate (event_deps%phs_identifiers (size
(phs%phs_identifiers)))
533 do i = 1, size (phs%phs_identifiers)
534 event_deps%phs_identifiers(i) = phs%phs_identifiers(i)
535 end do
536 ! event_deps%phs_identifiers = phs%phs_identifiers
537 end select
solves the issue of all four failing tests.
phs_identifiers is an allocatable array of type phs_identifier_t as defined in
the type
nlo_event_deps_t (lines 62-72 of evt_nlo.f90).
integer, dimension(:), allocatable :: phs_identifiers
And the type phs_identifier_t is defined in src/phase_space/phs_fks.f90, lines
264-275:
264 type :: phs_identifier_t
265 integer, dimension(:), allocatable :: contributors
266 integer :: emitter = -1
267 logical :: evaluated = .false.
268 contains
269 generic :: init => init_from_emitter,
init_from_emitter_and_contributors
270 procedure :: init_from_emitter => phs_identifier_init_from_emitter
271 procedure :: init_from_emitter_and_contributors &
272 => phs_identifier_init_from_emitter_and_contributors
273 procedure :: check => phs_identifier_check
274 procedure :: write => phs_identifier_write
275 end type phs_identifier_t
So it has an allocatable integer array as DT component. Maybe gfortran hiccups
on the allocation-on-assigment of something that is an allocatable DT with
allocatable DT components?
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Subject: [Bug target/87018] Boostrap problems on AIX
Date: Sat, 22 Sep 2018 22:52:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This seems to be the same as
https://sourceware.org/bugzilla/show_bug.cgi?id=22432 .
Could you try the patch in there?
>From gcc-bugs-return-615971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 22 22:52:01 2018
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From: "roscaeugeniu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87392] New: UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Sun, 23 Sep 2018 00:25:00 -0000
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Bug ID: 87392
Summary: UBSAN behavior on left-shifting 1 into the sign bit is
dependent on C standard
Product: gcc
Version: 8.1.0
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Reporter: roscaeugeniu at gmail dot com
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Dear GCC community,
Porting GCC UBSAN support from Linux kernel to U-Boot [1], we noticed [2] that
UBSAN complains about (0xfffff << 12) in U-Boot (saying "left shift of 1048575
by 12 places cannot be represented in type 'int'"), but doesn't complain about
the same piece of code in Linux kernel.
A simpler test-case with the same behavior is (1 << 31). The latter is commonly
used in the world of firmware, bootloaders and kernels. To give an example,
`git grep -E '1[ ]*<<[ ]*31' | wc -l` reports:
- 532 occurrences in U-Boot (v2018.09)
- 558 occurrences in coreboot (4.8)
- 1453 occurrences in Linux kernel (v4.19-rc4)
One could argue that the developers should just write (1UL << 31) to silent the
UBSAN. However, the problem is not limited to left-shifting constants, but also
applies to left-shifting 'unsigned char' variables (which become signed due to
promotion) [3]. To fix the latter, a cast to unsigned int is required prior to
left-shifting. But that, once again, only applies to non-Linux kernel code.
Doing some investigation why (1 << 31) is reported as undefined behavior in
U-Boot/coreboot, but not in Linux kernel, it turns out that UBSAN behavior
varies depending on the '-std=' option passed to gcc. For the record:
- Coreboot uses '-std=gnu11' since
https://github.com/coreboot/coreboot/commit/acbb70b810c6e
- U-Boot uses '-std=gnu11' since
http://git.denx.de/?p=u-boot.git;a=commitdiff;h=fa893990e9b5
- Linux uses '-std=gnu89' since
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b97e354ba9
### Compiling with '-std=gnu89'
My experiments show that the sample code [6], compiled with '-std=gnu89
-fsanitize=shift -lubsan' [7], triggers no UBSAN warning. This seems consistent
and independent on the gcc version [5] and on the signed integer overflow
options (-fwrapv/-fstrict-overflow/-fno-strict-overflow).
### Compiling with '-std=gnu11'
The same sample code [6], compiled with '-std=gnu11 -fsanitize=shift -lubsan'
[8] does trigger the UBSAN warning [9] by default. The newer gcc versions
6.4.0, 7.3.0, 8.1.0 (unlike 5.5.0 and 4.9.4) silent the warning if the code is
compiled with -fwrapv. GCC 8.1.0 (unlike the other versions) also silents the
warning with '-fno-strict-overflow' option alone (presumably due to the fact
that gcc-8 maps -fno-strict-overflow to "-fwrapv -fwrapv-pointer", according to
[10]).
All in all, what can be seen is that:
- The '-std=gnu89' UBSAN consistently refuses to report (1 << 31) as an issue.
- The '-std=gnu11' UBSAN, by default, reports (1 << 31) as "left-shifting into
sign bit" warning [9]. There are gcc options to silent [9], but these are
highly specific on the compiler version (hence can't be taken as a generic
solution).
Going forward and looking into the C standard itself, we see a difference
between how C89 and C11/C18 define the "left shift" operators:
C89 draft [11] says in §3.3.7:
------8<------
The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated
bits are filled with zeros. If E1 has an unsigned type, the value of
the result is E1 multiplied by the quantity, 2 raised to the power E2,
reduced modulo ULONG_MAX+1 if E1 has type unsigned long, UINT_MAX+1
otherwise. (The constants ULONG_MAX and UINT_MAX are defined in the
header <limits.h> .)
------8<------
Both C11 [12] and C18 [13] drafts say in §6.5.7p3:
------8<------
The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated bits
are filled with zeros. If E1 has an unsigned type, the value of the result
is E1 × 2^E2, reduced modulo one more than the maximum value representable
in the result type. If E1 has a signed type and nonnegative value, and
E1 × 2^E2 is representable in the result type, then that is the resulting
value; otherwise, the behavior is undefined.
------8<------
Based on my reading, none of the above paragraphs legitimates left-shifting
into the sign bit. Still, what we see in our test results is that the
'-std=gnu89' UBSAN never complains about (1 << 31), while the '-std=gnu11'
UBSAN pretty much always does.
So, here come the questions:
- Could you please explain the UBSAN inconsistency when compiled with
'-std=gnu89' and '-std=gnu11'?
- Assuming projects like U-Boot and coreboot prefer to compile with
'-std=gnu11' (and not to roll back to ANSI C), what is your recommendation on
handling the "left-shifting 1 into the sign bit" warnings, given that (as shown
above) neither -fwrapv nor -fno-strict-overflow heal these warnings
consistently across the compiler versions.
Thanks and regards,
Eugeniu.
### References
[1] https://patchwork.ozlabs.org/cover/962307/
[2] https://patchwork.ozlabs.org/patch/962305/#1980409
[3] Left-shifting into the sign bit, when left operand is an 'unsigned char'
variable:
- http://www.open-std.org/pipermail/ub/2013-October/000300.html
- https://patchwork.ozlabs.org/patch/962298/
[4] https://mail.coreboot.org/pipermail/coreboot/2018-February/086146.html
[5] GCC versions tried:
- gcc (Ubuntu 8.1.0-5ubuntu1~16.04) 8.1.0
- gcc (Ubuntu 7.3.0-21ubuntu1~16.04) 7.3.0
- gcc (Ubuntu 6.4.0-17ubuntu1~16.04) 6.4.0 20180424
- gcc (Ubuntu 5.5.0-12ubuntu1~16.04) 5.5.0 20171010
- gcc (Ubuntu 4.9.4-2ubuntu1~16.04) 4.9.4
[6] #include <stdio.h>
int main(void) { printf("%d\n", 1 << 31); return 0; }
[7] gcc -std=gnu89 -fsanitize=shift -c sample.c && gcc sample.o -lubsan -o
sample && ./sample
[8] gcc -std=gnu11 -fsanitize=shift -c sample.c && gcc sample.o -lubsan -o
sample && ./sample
[9] sample.c:2:35: runtime error: left shift of 1 by 31 places cannot be
represented in type 'int'
[10] https://gcc.gnu.org/gcc-8/changes.html
[11] https://port70.net/~nsz/c/c89/c89-draft.html#3.3.7
[12] http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf
[13]
http://www.open-std.org/jtc1/sc22/wg14/www/abq/c17_updated_proposed_fdis.pdf
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Sun, 23 Sep 2018 02:03:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See
https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc/Integers-implementation.html#Integers-implementation
The results of some bitwise operations on signed integers (C90 6.3, C99 and C11
6.5).
Bitwise operators act on the representation of the value including both the
sign and value bits, where the sign bit is considered immediately above the
highest-value value bit. Signed ‘>>’ acts on negative numbers by sign
extension.
As an extension to the C language, GCC does not use the latitude given in C99
and C11 only to treat certain aspects of signed ‘<<’ as undefined. However,
-fsanitize=shift (and -fsanitize=undefined) will diagnose such cases. They are
also diagnosed where constant expressions are required.
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Subject: [Bug c++/79013] Inconsistent auto diagnostic in member declarations
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87393] New: [8/9 Regression] gcc/cp/parser.c:13967:37:Unused Entity Issue: expression result unused: -Wunused-value since r251026
Date: Sun, 23 Sep 2018 07:02:00 -0000
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Bug ID: 87393
Summary: [8/9 Regression] gcc/cp/parser.c:13967:37:Unused
Entity Issue: expression result unused: -Wunused-value
since r251026
Product: gcc
Version: 9.0
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Following code has unused value:
...
/* Consume the `{' token. */
matching_braces braces;
braces.consume_open (parser)->location;
/* Parse the declarations. */
...
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Subject: [Bug fortran/87394] New: gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
Date: Sun, 23 Sep 2018 08:37:00 -0000
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Bug ID: 87394
Summary: gcc/fortran/decl.c:6466:16:Semantic Issue: variable
'stree' is used uninitialized whenever 'if' condition
is false: -Wsometimes-uninitialized
Product: gcc
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Problematic code snippet:
...
gfc_symtree *stree;
if (case1)
gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
else if (case2)
{
gfc_symtree *st2;
gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
st2->n.sym = stree->n.sym;
stree->n.sym->refs++;
}
sym->result = stree->n.sym;
...
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Subject: [Bug sanitizer/86012] [7/8/9 Regression] libsanitizer build failure on sparc64-linux-gnu
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--- Comment #5 from Matthias Klose <doko at gcc dot gnu.org> ---
Author: doko
Date: Sun Sep 23 08:36:14 2018
New Revision: 264511
URL: https://gcc.gnu.org/viewcvs?rev=264511&root=gcc&view=rev
Log:
2017-09-23 Matthias Klose <doko@ubuntu.com>
Backported from the gcc-7-branch:
2018-05-31 Matthias Klose <doko@ubuntu.com>
PR sanitizer/86012
* sanitizer_common/sanitizer_platform_limits_posix.cc: Define
SIZEOF_STRUCT_USTAT for 32bit sparc.
Modified:
branches/gcc-6-branch/libsanitizer/ChangeLog
branches/gcc-6-branch/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
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From: "efraim at flashner dot co.il" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/78417] target_clones default for powerpc64
Date: Sun, 23 Sep 2018 09:20:00 -0000
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Efraim <efraim at flashner dot co.il> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |efraim at flashner dot co.il
--- Comment #4 from Efraim <efraim at flashner dot co.il> ---
(In reply to Thomas Koenig from comment #0)
> The following does not work as expected.
>
> Either default is an invalid target for target_clones, or it is missing.
> Bit of a Catch-22 there :-)
>
> The reason why I'm interested is PR 78379; I think PowerPC could also
> profit from processor-specific versions of matmul in the library.
>
> [tkoenig@gcc1-power7 ~]$ cat target.c
> static double foo_int(const double *restrict, const double *restrict, int)
> __attribute__ ((target_clones("cpu=power7,cpu=power8,default")))
> ;
>
> double foo(const double *restrict a, const double *restrict b, int n)
> {
> return foo_int(a,b,n);
> }
>
> static double foo_int(const double *restrict a, const double *restrict b,
> int n)
> {
> double s;
> int i;
> s = 0.0;
> for (i=0; i<n; i++)
> s += a[i] * b[i];
>
> return s;
> }
> [tkoenig@gcc1-power7 ~]$ gcc -S target.c
> target.c:19:1: error: __attribute__((__target__("default"))) is invalid
> }
> ^
> target.c:10:15: error: attribute(target_clones("default")) is not valid for
> current target
> static double foo_int(const double *restrict a, const double *restrict b,
> int n)
> ^~~~~~~
> [tkoenig@gcc1-power7 ~]$ cat t2.c
> static double foo_int(const double *restrict, const double *restrict, int)
> __attribute__ ((target_clones("cpu=power7,cpu=power8")))
> ;
>
> double foo(const double *restrict a, const double *restrict b, int n)
> {
> return foo_int(a,b,n);
> }
>
> static double foo_int(const double *restrict a, const double *restrict b,
> int n)
> {
> double s;
> int i;
> s = 0.0;
> for (i=0; i<n; i++)
> s += a[i] * b[i];
>
> return s;
> }
> [tkoenig@gcc1-power7 ~]$ gcc -S t2.c
> t2.c:10:15: error: default target was not set
> static double foo_int(const double *restrict a, const double *restrict b,
> int n)
> ^~~~~~~
> [tkoenig@gcc1-power7 ~]$ gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/home/tkoenig/libexec/gcc/powerpc64-unknown-linux-gnu/7.
> 0.0/lto-wrapper
> Target: powerpc64-unknown-linux-gnu
> Configured with: ../trunk/configure --prefix=/home/tkoenig
> --enable-languages=c,c++,fortran
> Thread model: posix
> gcc version 7.0.0 20161116 (experimental) (GCC)
Is this bug still in effect? I got the documented failures using Debian's
gcc-6.3.0 from their repos. I then built gcc-8.2.0 and 'gcc -S t2.c' errored as
expected but 'gcc -S target.c' generated target.s. For the test I used a POWER8
machine from minicloud, running debian 9 ppc64le. Even adding 'cpu=power9' to
the target_clones list seems to have generated assembly code as expected.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
Date: Sun, 23 Sep 2018 09:46:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Problematic code snippet: ...
This looks like a false positive: the code snippet is accessed in an IF block
if (case1 || case2)
hence case1 and case2 cannot be both false.
IMO the "if (case2)" can be removed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
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--- Comment #2 from Eugeniu Rosca <roscaeugeniu at gmail dot com> ---
Hi Andrew,
> As an extension to the C language, GCC does not use the latitude given in C99 and C11 only to treat certain aspects of signed ‘<<’ as undefined. However, -fsanitize=shift (and -fsanitize=undefined) will diagnose such cases.
I think my report is purely and precisely related to left-shifting of 1 into
the sign bit (i.e. a subset of all possible '<<'-related UB) and I provide
evidence that UBSAN behaves differently between the C89/C90 and C11/C18
implementations.
I have backed up my questions with real-life motivation (Linux kernel is
compiled with -std=gnu89 while U-Boot/coreboot are compiled with -std=gnu11),
which means my questions do not come from some theoretical curiosity.
Your quote is helpful, but it still doesn't explain why (1 << 31) is defined
behavior in C89/C90, but not in C99/C11/C18, which triggers one
order-of-magnitude more UBSAN warnings in C11-compiled code compared to
C89-compiled one. Can you shed some light on this?
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Sun, 23 Sep 2018 09:59:00 -0000
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Eugeniu Rosca <roscaeugeniu at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |---
--- Comment #3 from Eugeniu Rosca <roscaeugeniu at gmail dot com> ---
Changing the status to UNCONFIRMED since the answer doesn't tackle the
questions posted in the report.
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Sun, 23 Sep 2018 10:08:00 -0000
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--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
it's been broken a looooong time - even apple-gcc-4.2.1 is broken, I don't have
3.3 anywhere without booting an old machine.
clang produces:
.section __DATA,__data
.globl __ZN1AIiE6memberE ## @_ZN1AIiE6memberE
.weak_definition __ZN1AIiE6memberE
.p2align 2
__ZN1AIiE6memberE:
.long 0 ## 0x0
====
it doesn't *look* like a back-end issue (the weak is missing by the time we get
to varpool_node::assemble_decl) - present in the decl for Linux, missing for
Darwin.
Darwin declares MAKE_DECL_ONE_ONLY() => weak and that should fire up
SUPPORTS_ONE_ONLY.
so... now to figure out where the divergence is.
>From gcc-bugs-return-615982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 10:08:55 2018
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Subject: [Bug fortran/87395] New: [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 10:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87395
Bug ID: 87395
Summary: [9 Regression] ICE in in lookup_field_for_decl with
whizard
Product: gcc
Version: 9.0
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Priority: P3
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I was trying to debug PR 87395 a bit, and found that there was
an ICE now instead...
This is with r264506, so this is really recent. I have a sneaking
suspicion I may have caused this myself, with that exact revision...
make[1]: Entering directory '/home/ig25/Downloads/whizard-2.6.4/src/events'
FC eio_stdhep.lo
eio_stdhep.f90:343:0:
343 | subroutine eio_stdhep_input_i_prc (eio, i_prc, iostat)
|
interner Compiler-Fehler: in lookup_field_for_decl, bei tree-nested.c:277
0x6d67b2 lookup_field_for_decl
../../trunk/gcc/tree-nested.c:277
0xe1d311 convert_local_reference_stmt
../../trunk/gcc/tree-nested.c:2282
0xb21436 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:568
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb214f2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:675
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb214f2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:675
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb21542 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:631
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb214f2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:675
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb21542 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:631
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xb214f2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:675
0xb21620 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk/gcc/gimple-walk.c:51
0xe18c08 walk_body
../../trunk/gcc/tree-nested.c:702
0xe192b8 walk_function
../../trunk/gcc/tree-nested.c:713
0xe192b8 walk_all_functions
../../trunk/gcc/tree-nested.c:778
0xe1f6cd lower_nested_functions(tree_node*)
>From gcc-bugs-return-615983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 10:16:03 2018
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 10:17:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |8.2.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-09-23
Ever confirmed|0 |1
Target Milestone|--- |9.0
Known to fail| |9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. Revision r264486 (configured with --enable-checking=release) is OK.
>From gcc-bugs-return-615984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 10:17:27 2018
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 10:42:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Yes, r264506 it was. r264505 is OK.
So, next thing is to find out how to run a single compilation
from that rather big build system...
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Subject: [Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem
Date: Sun, 23 Sep 2018 10:48:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
I found this bug by compiling gcc with the new clang 7.0
It seems that gcc can't be encouraged to warn about self-assignment.
For example:
$cat sep23a.cc
// -Wself-assign. clang has it. gcc doesn't.
extern void g( int);
void f(int n)
{
int m = 2 * n;
m = m;
g( m);
}
$ ~/gcc/results/bin/gcc -c -O2 -Wall -Wextra sep23a.cc
$
Given that this warning finds bugs in gcc itself, would this
-Wself-assign warning be worth implementing in gcc ?
I'll have a go at compiling the rest of the world with clang-7.0
and see what it finds.
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Subject: [Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Looks like an old implementation:
https://gcc.gnu.org/ml/gcc-patches/2010-06/msg02390.html
It might be worth using this as a starting point.
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 10:56:00 -0000
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Sep 23 10:52:27 2018
New Revision: 264512
URL: https://gcc.gnu.org/viewcvs?rev=264512&root=gcc&view=rev
Log:
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87395
* gfc_conv_procedure_call: Reformat comments slightly. Do not add
clobber on INTENT(OUT) for saved variables.
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87395
* gfortran.dg/intent_out_10.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_10.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed (I also checked that whizard compiles again).
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Subject: [Bug middle-end/41453] use INTENT(out) for optimization
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Bug 41453 depends on bug 87395, which changed state.
Bug 87395 Summary: [9 Regression] ICE in in lookup_field_for_decl with whizard
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87395
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In C90, it was implemented defined behavior (while in C99 and above it is
undefined behavior).
See the thread which added undefined santizer:
https://gcc.gnu.org/ml/gcc-patches/2013-06/msg00275.html
For the "a < 0" here, and signed left shift of a positive value shifting a
1 into or past the sign bit, I think it should be possible to control the
checks separately from other checks on shifts - both because those cases
were implementation-defined in C90, only undefined in C99/C11, and because
they are widely used in practice.
--- CUT ---
See also https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54027 where a C90 program
is defined but C99 would be defined and there is talk about why too.
>I provide evidence that UBSAN behaves differently between the C89/C90 and C11/C18 implementations.
Yes you did not read the full quote there. The part about ubsan is with
respect to C99 undefined behavior. AGain in C90, this is implementation
defined while C99 it is undefined. YES there is a huge difference between the
languages which cannot be changed now as that would be requiring to change C90.
>ANSI C
ANSI C is ISO C. ANSI is a member of ISO. I think you meant to write ANSI C89
there :).
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Subject: [Bug c++/77314] Allows C++11 POD types in anonymous structures.
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Harald van Dijk <harald at gigawatt dot nl> changed:
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--- Comment #1 from Harald van Dijk <harald at gigawatt dot nl> ---
The error comes from gcc/cp/decl.c and is preceded by the comment:
/* Anonymous aggregates cannot have fields with ctors, dtors or complex
assignment operators (because they cannot have these methods themselves).
For anonymous unions this is already checked because they are not allowed
in any union, otherwise we have to check it. */
This comment seems outdated: C++11+ anonymous unions can have such fields, and
GCC correctly implements this. Errors for such anonymous unions are only issued
with -std=c++03/-std=gnu++03.
For anonymous structs, clang issues this error message too only in C++03 modes,
not in C++11+ modes. Perhaps GCC needs to follow that and let this diagnostic
be conditional on the language version too.
A workaround for current GCC versions is to use an array of size 1.
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Subject: [Bug fortran/65677] Incomplete assignment on deferred-length character variable
Date: Sun, 23 Sep 2018 12:36:00 -0000
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44738
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44738&action=edit
A fix for the PR
I have no idea at all why I didn't manage to fix this previously. It is almost
obvious.
Paul
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Sun, 23 Sep 2018 12:46:00 -0000
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--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Gerhard Steinmetz from comment #0)
> With an effectively empty (i=m,n and m>n) array constructor :
>
>
> $ cat z1.f90
> program p
> integer i
> print *, [(f(i), i=2,1)]
> contains
> function f(n)
> integer :: n
> character(:), allocatable :: f
> character(3) :: c = 'abc'
> f = c(n:n)
> end
> end
>
>
> $ gfortran -g -O0 -Wall -fcheck=all -fno-frontend-optimize z1.f90
> z1.f90:3:25:
>
> print *, [(f(i), i=2,1)]
> 1
> Warning: DO loop at (1) will be executed zero times [-Wzerotrip]
> f951: internal compiler error: in gfc_resolve_character_array_constructor,
> at fortran/array.c:1955
The ICE has been fixed on trunk, at least. I will check other branches when I
am back at base in a week's time.
Paul
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
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--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Gerhard Steinmetz from comment #2)
> Another group of examples.
> First case is working in a sufficient manner.
> Concatenating two empty hulls (zero len and size, respectivly)
> gives an empty hull as result again.
>
>
> $ cat zz1.f90
> program p
> character(*), parameter :: c1(*) = [character(*) :: 'a'] // [character(*)
> :: 'z']
> character(*), parameter :: c2(*) = [character(0) ::] // [character(0) ::]
> character(*), parameter :: c3(*) = [character(0) ::] // [character(*) ::]
> character(*), parameter :: c4(*) = [character(0) ::]
> print *, 'c1: ', len(c1), size(c1), c1
> print *, 'c2: ', len(c2), size(c2), c2
> print *, 'c3: ', len(c3), size(c3), c3
> print *, 'c4: ', len(c4), size(c4), c4
> end
>
>
> $ gfortran-6 -g -O0 -Wall -fcheck=all zz1.f90
> $ a.out
> c1: 2 1 az
> c2: 0 0
> c3: 0 0
> c4: 0 0
>
> ---
>
>
> Next case is questionable : no error, unexpected results.
>
>
> $ cat zz2.f90
> program p
> character(*), parameter :: c5(*) = [character(*) :: 'a'] // [character(0)
> ::]
> character(*), parameter :: c6(*) = [character(0) ::] // [character(*) ::
> 'z']
> print *, 'c5: ', len(c5), size(c5), c5
> print *, 'c6: ', len(c6), size(c6), c6
> end
>
>
> $ gfortran-6 -g -O0 -Wall -fcheck=all zz2.f90
> $ a.out
> c5: 0 0
> c6: 0 0
>
>
>
> Errors detected with alternative code :
>
> $ cat zz3.f90
> program p
> character(*), parameter :: b1(*) = [character(*) :: 'a']
> character(*), parameter :: b2(*) = [character(0) ::]
> character(*), parameter :: b3(*) = b1 // b2
> ! character(*), parameter :: b4(*) = b2 // b1
> print *, 'b1: ', len(b1), size(b1), b2
> print *, 'b2: ', len(b2), size(b2), b2
> print *, 'b3: ', len(b3), size(b3), b3
> ! print *, 'b4: ', len(b4), size(b4), b4
> end
>
>
> $ gfortran-6 -g -O0 -Wall -fcheck=all zz3.f90
> zz3.f90:4:37-43:
>
> character(*), parameter :: b3(*) = b1 // b2
> 1 2
> Error: Shapes for operands at (1) and (2) are not conformable
> zz3.f90:8:24:
>
> print *, 'b3: ', len(b3), size(b3), b3
> 1
> Error: 'string' argument of 'len' intrinsic at (1) must be CHARACTER
> zz3.f90:8:34:
>
> print *, 'b3: ', len(b3), size(b3), b3
> 1
> Error: 'array' argument of 'size' intrinsic at (1) must be an array
All these yield the error:
"Type-spec at (1) cannot contain an asterisk for a type parameter"
on trunk. Again, I will check previous branches in a week or so.
Paul
>From gcc-bugs-return-615995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 12:49:39 2018
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Sun, 23 Sep 2018 12:49:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
Ha! I should have read to the end of the PR. It was never closed. Doing so now.
Thanks for the report.
Paul
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Subject: [Bug fortran/68241] [meta-bug] [F03] Deferred-length character
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Bug 68241 depends on bug 67883, which changed state.
Bug 67883 Summary: ICE on empty array constructor of character function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67883
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-615997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 13:18:54 2018
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
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--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #7)
> it's been broken a looooong time - even apple-gcc-4.2.1 is broken
actually, that's not true; it puts the symbol in common to merge this.
>From gcc-bugs-return-615998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 13:40:24 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #33 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 44739
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44739&action=edit
Reproducer for the ICE.
Paul, here is a first (still massive) reproducer of the second problem. Though
it is still big, it is stripped from the whole configure and dynamic library
infrastructure of our code, and it doesn't need any generated Fortran code via
our OCaml-written code generator. I'll try to reduce it a little further.
>From gcc-bugs-return-615999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 18:18:35 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/87396] New: gcc/ada/gcc-interface/decl.c:8798:53:Value Conversion Issue: implicit conversion from 'int' to 'char' changes value from 132 to -124: -Wconstant-conversion
Date: Sun, 23 Sep 2018 18:31:00 -0000
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Bug ID: 87396
Summary: gcc/ada/gcc-interface/decl.c:8798:53:Value Conversion
Issue: implicit conversion from 'int' to 'char'
changes value from 132 to -124: -Wconstant-conversion
Product: gcc
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Maybe it's a relevant warning for Ada FE:
8795 /* Only issue an error if a Value_Size clause was explicitly given.
8796 Otherwise, we'd be duplicating an error on the Size clause. */
8797 gnat_attr_node
8798 = Get_Attribute_Definition_Clause (gnat_entity, Attr_Value_Size);
8799
8800 /* Get the size as an INTEGER_CST. Issue an error if a size was
specified
8801 but cannot be represented in bitsizetype. */
8802 size = UI_To_gnu (uint_size, bitsizetype);
8803 if (TREE_OVERFLOW (size))
>From gcc-bugs-return-616001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 23 18:38:15 2018
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Subject: [Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=53129
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Binderman from comment #1)
> I found this bug by compiling gcc with the new clang 7.0
>
> It seems that gcc can't be encouraged to warn about self-assignment.
>
> For example:
>
> $cat sep23a.cc
> // -Wself-assign. clang has it. gcc doesn't.
>
> extern void g( int);
>
> void f(int n)
> {
> int m = 2 * n;
>
> m = m;
>
> g( m);
> }
>
> $ ~/gcc/results/bin/gcc -c -O2 -Wall -Wextra sep23a.cc
> $
>
> Given that this warning finds bugs in gcc itself, would this
> -Wself-assign warning be worth implementing in gcc ?
That's bug 53129.
>
> I'll have a go at compiling the rest of the world with clang-7.0
> and see what it finds.
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Subject: [Bug c/87390] [x86 32bit only] GCC does not honor FLT_EVAL_METHOD on implicit conversion of integer to floating point
Date: Sun, 23 Sep 2018 18:38:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
This bug originally came from this discussion on gcc-help:
https://gcc.gnu.org/ml/gcc-help/2018-09/msg00072.html
(In reply to Andrew Pinski from comment #1)
> Not much people care about 32bit x86 any more ...
I still do.
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Subject: [Bug target/78417] target_clones default for powerpc64
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It now says
78417-1.c:10:15: error: target_clones attribute needs GLIBC (2.23 and newer)
that exports hardware capability bits
static double foo_int(const double *restrict a, const double *restrict b, int
n)
^~~~~~~
78417-1.c:10:15: error: default 'target_clones' attribute was not set
on systems with older glibc, and seems to work fine on systems with new
enough glibc.
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Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
Date: Sun, 23 Sep 2018 18:54:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> > Problematic code snippet: ...
>
> This looks like a false positive: the code snippet is accessed in an IF block
>
> if (case1 || case2)
>
> hence case1 and case2 cannot be both false.
>
> IMO the "if (case2)" can be removed.
Great, that's more readable. May I include the change in changes I'm planning
to test and submit to mailing list?
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Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> May I include the change in changes I'm planning to test
> and submit to mailing list?
Indeed!
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Subject: [Bug fortran/87397] New: Clobbering intent(out) variables caused regression in OpenCoarrays testsuite
Date: Sun, 23 Sep 2018 19:24:00 -0000
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Bug ID: 87397
Summary: Clobbering intent(out) variables caused regression in
OpenCoarrays testsuite
Product: gcc
Version: 9.0
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Severity: normal
Priority: P3
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The recent patch to clobber intent(out) variables before a call appears to
cause a regression in one of the OpenCoarrays testcases.
I try to build OpenCoarrays with
mkdir build
cd build
FC=~/.local/bin/gfortran cmake -DCMAKE_INSTALL_PREFIX=~/.local
-DCMAKE_PREFIX_PATH=~/src/gfortran/trunk/install/ ..
⯠make
[ 1%] Built target
opencoarrays_mod
[ 4%] Built target caf_mpi
[ 7%]
Built target caf_mpi_static
[ 8%] Generating hello_multiverse
[ 8%] Built target build_hello_multiverse
[ 9%] Generating coarray_distributed_transpose
/home/janne/src/gfortran/OpenCoarrays/src/tests/integration/dist_transpose/coarray_distributed_transpose.F90:97:0:
97 | program coarray_distributed_transpose
|
internal compiler error: in lookup_field_for_decl, at tree-nested.c:277
0xd2570d lookup_field_for_decl
../../trunk-git/gcc/tree-nested.c:277
0xd28766 convert_local_reference_stmt
../../trunk-git/gcc/tree-nested.c:2282
0x9b7f66 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:568
0x9b81a0 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:51
0x9b80d1 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:631
0x9b81a0 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:51
0x9b8061 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:595
0x9b81a0 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:51
0x9b80d1 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:631
0x9b81a0 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:51
0x9b8061 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:595
0x9b81a0 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../trunk-git/gcc/gimple-walk.c:51
0xd22258 walk_body
../../trunk-git/gcc/tree-nested.c:702
0xd222d5 walk_function
../../trunk-git/gcc/tree-nested.c:713
0xd222d5 walk_all_functions
../../trunk-git/gcc/tree-nested.c:778
0xd2c086 lower_nested_functions(tree_node*)
../../trunk-git/gcc/tree-nested.c:3413
0x810b00 cgraph_node::analyze()
../../trunk-git/gcc/cgraphunit.c:675
0x813f29 analyze_functions
../../trunk-git/gcc/cgraphunit.c:1122
0x815002 symbol_table::finalize_compilation_unit()
../../trunk-git/gcc/cgraphunit.c:2760
Reverting the PR 41453 clobbering patch (and the follow-up patch to fix PR
87395) allows it to continue from there.
(it might of course also be a bug in the testcase, I haven't looked into it. In
general I think this idea of clobbering intent(out) variables is good.)
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Subject: [Bug fortran/87337] Internal compiler error on coarrays
Date: Sun, 23 Sep 2018 19:26:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jb at gcc dot gnu.org
--- Comment #1 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Seems to at least compile properly with GCC 9, FWIW.
Attempting to run it causes the error
Fortran runtime error on image 8: libcaf_mpi::caf_send_by_ref(): rank out of
range.
(where "8" depend on how many images I try to use, anything > 1 seems to cause
the failure)
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Subject: [Bug fortran/87397] Clobbering intent(out) variables caused regression in OpenCoarrays testsuite
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-23
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Let's see...
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Sep 23 20:17:25 2018
New Revision: 264518
URL: https://gcc.gnu.org/viewcvs?rev=264518&root=gcc&view=rev
Log:
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87397
* gfc_conv_procedure_call: Do not add clobber on INTENT(OUT)
for variables having the dimension attribute.
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87395
* gfortran.dg/intent_out_11.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_11.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #8)
> (In reply to Iain Sandoe from comment #7)
> > it's been broken a looooong time - even apple-gcc-4.2.1 is broken
>
> actually, that's not true; it puts the symbol in common to merge this.
so the culprit is:
gcc/config/darwin.h:
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
.. this has been there for a long time.
So, now I need to audit what versions of ld64 really don't care about this.
Setting this to 0 (with recent as/ld64), makes the testcase complete without
throwing. Bootstrapping and checking on a few systems.
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Subject: [Bug fortran/87397] Clobbering intent(out) variables caused regression in OpenCoarrays testsuite
Date: Sun, 23 Sep 2018 20:34:00 -0000
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Sep 23 20:17:25 2018
New Revision: 264518
URL: https://gcc.gnu.org/viewcvs?rev=264518&root=gcc&view=rev
Log:
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87397
* gfc_conv_procedure_call: Do not add clobber on INTENT(OUT)
for variables having the dimension attribute.
2018-09-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87395
* gfortran.dg/intent_out_11.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_11.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87397] Clobbering intent(out) variables caused regression in OpenCoarrays testsuite
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed.
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 21:08:00 -0000
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Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #6 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Thomas Koenig from comment #0)
> I was trying to debug PR 87395 a bit, and found that there was
> an ICE now instead...
>
> This is with r264506, so this is really recent. I have a sneaking
> suspicion I may have caused this myself, with that exact revision...
>
Thanks for fixing regressions that affect our code before we even notice them.
Our CI just two hours ago reported this issue ;)
Guess you meant "I was trying to debug PR 87359"!? (awful, that this bug was
PR87395 instead of PR87259 :P )
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
Date: Sun, 23 Sep 2018 21:31:00 -0000
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--- Comment #7 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Jürgen Reuter from comment #6)
> (In reply to Thomas Koenig from comment #0)
> > I was trying to debug PR 87395 a bit, and found that there was
> > an ICE now instead...
> >
> > This is with r264506, so this is really recent. I have a sneaking
> > suspicion I may have caused this myself, with that exact revision...
> >
>
> Thanks for fixing regressions that affect our code before we even notice
> them. Our CI just two hours ago reported this issue ;)
> Guess you meant "I was trying to debug PR 87359"!? (awful, that this bug was
> PR87395 instead of PR87259 :P )
Bazinga! And now I might a number error again.... PR87259 -> PR87359.
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87398] New: g++ ICE on valid code: tree check: expected record_type or union_type or qual_union_type, have array_type in cxx_eval_constant_expression, at cp/constexpr.c:4820
Date: Sun, 23 Sep 2018 21:39:00 -0000
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Bug ID: 87398
Summary: g++ ICE on valid code: tree check: expected
record_type or union_type or qual_union_type, have
array_type in cxx_eval_constant_expression, at
cp/constexpr.c:4820
Product: gcc
Version: unknown
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Target Milestone: ---
It happens with flag "-std=c++2a". It appears to start with r264408.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180923 (experimental) [trunk revision 264513] (GCC)
$ g++-trunk -std=c++2a abc.C
abc.C: In function ‘void c()’:
abc.C:7:20: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have array_type in cxx_eval_constant_expression,
at cp/constexpr.c:4820
7 | int d(e[4][d].b());
| ^
0x79a6c4 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9369
0x880c98 tree_check3(tree_node*, char const*, int, char const*, tree_code,
tree_code, tree_code)
../../gcc/gcc/tree.h:3153
0x880c98 cxx_eval_constant_expression
../../gcc/gcc/cp/constexpr.c:4820
0x87bdd7 cxx_eval_call_expression
../../gcc/gcc/cp/constexpr.c:1508
0x87df1d cxx_eval_constant_expression
../../gcc/gcc/cp/constexpr.c:4284
0x8832fe cxx_eval_outermost_constant_expr
../../gcc/gcc/cp/constexpr.c:5018
0x886518 maybe_constant_value(tree_node*, tree_node*)
../../gcc/gcc/cp/constexpr.c:5245
0x8963d1 cp_fully_fold(tree_node*)
../../gcc/gcc/cp/cp-gimplify.c:2120
0x89e28f cp_convert_and_check(tree_node*, tree_node*, int)
../../gcc/gcc/cp/cvt.c:656
0x84c3b5 convert_like_real
../../gcc/gcc/cp/call.c:7219
0x84d508 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
../../gcc/gcc/cp/call.c:10938
0xa15311 digest_init_r
../../gcc/gcc/cp/typeck2.c:1195
0xa17f02 digest_init_flags(tree_node*, tree_node*, int, int)
../../gcc/gcc/cp/typeck2.c:1211
0xa17f02 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/gcc/cp/typeck2.c:808
0x8ae4ed check_initializer
../../gcc/gcc/cp/decl.c:6481
0x8c657f cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc/gcc/cp/decl.c:7152
0x961466 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:19893
0x968653 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13189
0x96a1b9 cp_parser_declaration_statement
../../gcc/gcc/cp/parser.c:12608
0x949023 cp_parser_statement
../../gcc/gcc/cp/parser.c:10953
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.C
class a {
public:
virtual long b();
};
void c() {
a e[5][2];
int d(e[4][d].b());
}
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Subject: [Bug fortran/87395] [9 Regression] ICE in in lookup_field_for_decl with whizard
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #7)
> Bazinga! And now I might a number error again.... PR87259 -> PR87359.
There have been occasions where I thought that having a checksum
on PR numbers might have been a good idea :-)
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Subject: [Bug bootstrap/87272] Infinite loop for incorrect hardware clock
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Then set the clock to be semi-correct.
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Subject: [Bug fortran/85603] ICE with character array substring assignment
Date: Mon, 24 Sep 2018 01:11:00 -0000
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--- Comment #4 from Walter Spector <w6ws at earthlink dot net> ---
Hi Paul,
I built an updated compiler that includes your fix. The ICE is gone - thanks!
However the assignment is still not correctly compiled.
The example should be reallocating the character string length of the array to
15. Unfortunately it remains at 32. Slightly longer example:
program strlen_bug
implicit none
character(:), allocatable :: strings(:)
integer :: maxlen
strings = [ character(32) :: &
'short', &
'somewhat longer' ]
maxlen = maxval (len_trim (strings))
print *, 'max length =', maxlen
! Used to cause an ICE
strings = strings(:)(:maxlen) ! Should realloc
print *, strings
print *, 'string length =', len (strings)
end program
wws@w6ws-4:/rootsda5/home/wws/fortran/gfortran$ /usr/local/gcc-9/bin/gfortran
-frealloc-lhs strlen_bug.f90
wws@w6ws-4:/rootsda5/home/wws/fortran/gfortran$ a.out
max length = 15
short somewhat longer
string length = 32
wws@w6ws-4:/rootsda5/home/wws/fortran/gfortran$ /usr/local/gcc-9/bin/gfortran
--version
GNU Fortran (GCC) 9.0.0 20180922 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
wws@w6ws-4:/rootsda5/home/wws/fortran/gfortran$
Note that I tried explicitly adding the -frealloc-lhs option, but it didn't
make a difference either way.
>From gcc-bugs-return-616018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:11:35 2018
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-616019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:44:11 2018
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Subject: [Bug middle-end/64339] reject unsafe options in pragma GCC optimize
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |joseph at codesourcery dot com
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> (In reply to Manuel López-Ibáñez from comment #0)
> > Some options are known to be unsafe to set via pragma GCC optimize. See:
> > https://sourceware.org/ml/libc-alpha/2014-12/msg00597.html and
> > https://sourceware.org/ml/libc-alpha/2014-12/msg00599.html
> >
> > It would be better to add a flag to the *.opt files to mark safe options
> > explicitly, such that specifying any option that is not safe produces a
> > fatal error.
>
> Taking Joseph's comments in the linked thread as confirmation.
...and cc-ing him.
>From gcc-bugs-return-616020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:45:52 2018
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Subject: [Bug c/65253] Wmemsize-comparison
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |brobecker at gnat dot com,
| |howarth.at.gcc at gmail dot com
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> (In reply to Manuel López-Ibáñez from comment #0)
> > Clang does:
> >
> > remote.c:5519:47: warning: size argument in 'strncmp' call is a
> > comparison [-Wmemsize-comparison]
> > && strncmp (p, "core", strlen ("core") != 0))
> > ~~~~~~~~~~~~~~~~^~~~
> > remote.c:5519:11: note: did you mean to compare the result of 'strncmp'
> > instead?
> > && strncmp (p, "core", strlen ("core") != 0))
> > ^ ~
> > )
> > remote.c:5519:31: note: explicitly cast the argument to size_t to
> > silence this warning
> > && strncmp (p, "core", strlen ("core") != 0))
> > ^
> > (size_t)( )
> >
> > and it founds bugs in gdb:
> > https://sourceware.org/ml/gdb/2015-02/msg00088.html
>
> I'll take the gdb discussion as confirmation
cc-ing people from it
>From gcc-bugs-return-616021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:52:30 2018
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Subject: [Bug tree-optimization/50480] 10% performance regression on Spec2006 410.bwaves
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Michael Meissner from comment #6)
> Created attachment 27206 [details]
> ivtops dump from subversion id 183934 (after regression)
Where are we supposed to be looking in this?
>From gcc-bugs-return-616022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:54:47 2018
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Subject: [Bug testsuite/70230] 11 test regressions when building GCC 6 with --enable-default-ssp
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |hjl at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to psturm from comment #2)
> 2 new failures appeared when testing with only --enable-default-ssp using
> the hjl/pr70150 branch:
>
> > FAIL: gcc.target/i386/cleanup-1.c execution test
> > FAIL: gcc.target/i386/cleanup-2.c execution test
>
> Are these also to be expected or is it something more?
Let's ask HJ
>From gcc-bugs-return-616023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 01:58:12 2018
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Subject: [Bug c/82272] RFE: request a warning for (<nonbool> == <bool>) etc.
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #5)
> I submitted N2229 to WG14:
> http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2229.htm
>
> I also opened Glibc bug for isdigit() et al. referenced in the paper:
> https://sourceware.org/bugzilla/show_bug.cgi?id=23003
Any updates on these?
>From gcc-bugs-return-616024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:01:56 2018
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Subject: [Bug c++/85043] -Wuseless-cast false positive for temporary objects
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paolo Carlini from comment #11)
> That approach would be definitely Ok with me, Eric.
OK, thanks.
...were you suggesting that I try doing that myself? I'd like to, but my local
clone of the gcc repo isn't exactly in a healthy state to be committing from
currently...
>From gcc-bugs-return-616025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:06:23 2018
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Andrew Pinski from comment #4)
> > Can you try GCC 5.x and/or the trunk? There has been many IVOPTs
> > improvements since 4.8.x.
>
> Putting in WAITING until this is tried.
No response; closing
>From gcc-bugs-return-616026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:07:13 2018
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Subject: [Bug target/45927] autoconf regression wrt .quad availability targeting amd64 from biarch cross compiler
Date: Mon, 24 Sep 2018 02:08:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > Does this still happen in GCC 5?
>
> putting in WAITING on a reply to this
No reply, assuming it no longer happens
>From gcc-bugs-return-616027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:08:09 2018
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Subject: [Bug fortran/77865] Regression: wrong debug information for gfortran pointers to structures
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> Duplicate of/ related to pr71906?
Well related to at least...
(...why does this need to be in WAITING?)
>From gcc-bugs-return-616028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:11:56 2018
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Subject: [Bug c/83656] missing -Wbuiltin-declaration-mismatch on declaration without prototype
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01645.html
So according to that discussion, it stalled due to producing a bunch of
warnings in autoconf scripts; repeating my comment about autoconf from that
thread: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01894.html
>From gcc-bugs-return-616029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:13:41 2018
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Subject: [Bug c++/86329] Bogus fix-it hint: note: suggested alternative: '._72'
Date: Mon, 24 Sep 2018 02:58:00 -0000
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #4)
> Fixed on trunk by r262199; still affects gcc-8 and gcc-7 branches.
so what should be the target milestone then?
>From gcc-bugs-return-616030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 02:58:40 2018
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Subject: [Bug c++/80078] Incorrect classification of address of volatile as not constant
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Christopher Head <headch at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |8.2.0
--- Comment #2 from Christopher Head <headch at gmail dot com> ---
This is still broken in 8.2.0. Also, it affects struct members as well as
arrays, which have no easy workaround like “ary + Nâ€:
struct S {
int x;
};
volatile S s;
static_assert(&s.x, "");
>From gcc-bugs-return-616031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 03:04:47 2018
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Subject: [Bug c++/87399] New: Inconsistent determination of what is usable in a constant expression with __PRETTY_FUNCTION__
Date: Mon, 24 Sep 2018 07:09:00 -0000
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Bug ID: 87399
Summary: Inconsistent determination of what is usable in a
constant expression with __PRETTY_FUNCTION__
Product: gcc
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Reduced from StackOverflow (https://stackoverflow.com/q/52472000/2069064):
template <int>
struct X { };
constexpr int f(char const *s)
{
return *s;
}
void test()
{
constexpr int i = f(__PRETTY_FUNCTION__);
X<i> x;
X<f(__PRETTY_FUNCTION__)> y;
}
gcc accepts the declaration of x and rejects the declaration of y. clang
accepts both. I am not sure, but based on my reading of [expr.const], since
__PRETTY_FUNCTION__ is not defined with constexpr, we run afoul of 2.7, and
both declarations of x and y should be rejected?
Either way, it seems like either both should be accepted or both should be
rejected.
>From gcc-bugs-return-616032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 07:09:01 2018
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Subject: [Bug middle-end/63155] [6/7/8/9 Regression] memory hog
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--- Comment #32 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 24 07:08:24 2018
New Revision: 264523
URL: https://gcc.gnu.org/viewcvs?rev=264523&root=gcc&view=rev
Log:
2018-09-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/63155
* tree-ssa-propagate.c (add_ssa_edge): Avoid adding PHIs to
the worklist when the edge of the respective argument isn't
executable.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-propagate.c
>From gcc-bugs-return-616033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 07:23:18 2018
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Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |9.0
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Subject: [Bug ada/87396] gcc/ada/gcc-interface/decl.c:8798:53:Value Conversion Issue: implicit conversion from 'int' to 'char' changes value from 132 to -124: -Wconstant-conversion
Date: Mon, 24 Sep 2018 07:59:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
We should probably be converting to 'unsigned char' instead.
>From gcc-bugs-return-616035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 07:59:05 2018
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Subject: [Bug ada/87396] ada/gcc-interface/decl.c:8798:53:Value Conversion Issue: implicit conversion from 'int' to 'char' changes value from 132 to -124: -Wconstant-conversion
Date: Mon, 24 Sep 2018 08:05:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
Summary|gcc/ada/gcc-interface/decl. |ada/gcc-interface/decl.c:87
|c:8798:53:Value Conversion |98:53:Value Conversion
|Issue: implicit conversion |Issue: implicit conversion
|from 'int' to 'char' |from 'int' to 'char'
|changes value from 132 to |changes value from 132 to
|-124: -Wconstant-conversion |-124: -Wconstant-conversion
>From gcc-bugs-return-616036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 08:05:10 2018
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Subject: [Bug c/87400] New: GCC doesn't produce valid frames for stack traces with Thumb-2 (Cortex-M3+)
Date: Mon, 24 Sep 2018 08:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87400
Bug ID: 87400
Summary: GCC doesn't produce valid frames for stack traces with
Thumb-2 (Cortex-M3+)
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: alexkalmuk at gmail dot com
Target Milestone: ---
Target: arm-none-eabi
GCC generates special frames for doing stack traces on ARM. These frames can be
generated for ARM instruction set using `-mapcs-frame`:
Example of the produced frame:
$ arm-none-eabi-gcc -marm -mcpu=arm926ej-s -march=armv5te -mapcs-frame
--specs=nosys.specs -o test test.c
000081f8 <my_func>:
81f8: e1a0c00d mov ip, sp
81fc: e92dd800 push {fp, ip, lr, pc}
This type of prologue can be also generated for Cortex-M (thumb instruction
set) using `-mthumb -mcpu=cortex-m1 -mtpcs-frame -mtpcs-leaf-frame`:
$ arm-none-eabi-gcc -mthumb -mcpu=cortex-m1 -mtpcs-frame -mtpcs-leaf-frame
--specs=nosys.specs -o test test.c
In that case function prologue will look like:
00008104 <my_func>:
8104: b084 sub sp, #16
8106: b580 push {r7, lr}
8108: aa06 add r2, sp, #24
810a: 9203 str r2, [sp, #12]
810c: 467a mov r2, pc
810e: 9205 str r2, [sp, #20]
8110: 465a mov r2, fp
8112: 9202 str r2, [sp, #8]
It's the same thing like for ARM instruction set, but since Thumb doesn't allow
to push high registers, GCC produces it through mov/str instructions.
But in case of `-mcpu=cortex-m3` (instead of `-mcpu=cortex-m1`), we do not get
such prologue. After investigating gcc/config/arm/arm.c, I figured out that
these prologues are generated only for Thumb-1 (Cortex-M0/M1) and ARM
instruction sets, but ingnored for Thumb-2 (Cortex-M3+). It is a bug, or there
is some reason do not generate these prologues for Thumb-2?
>From gcc-bugs-return-616037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 08:07:08 2018
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Subject: [Bug fortran/87401] New: [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 08:13:00 -0000
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Bug ID: 87401
Summary: [9 Regression] Runtime segfault with associated
intent(out) variable
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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This regression is most probably due to r264506 (PR 41453):
program assoc_intent_out
implicit none
real :: r
associate(o => r)
call sub(o)
end associate
contains
subroutine sub(out)
real, intent(out) :: out
out = 0.0
end subroutine
end
With current trunk this fails at runtime with a segfault on the line "out =
0.0".
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 08:13:00 -0000
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--- Comment #1 from janus at gcc dot gnu.org ---
(In reply to janus from comment #0)
> With current trunk this fails at runtime
To be precise, I'm at r264522.
>From gcc-bugs-return-616039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 08:13:12 2018
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 08:21:00 -0000
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |9.0
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 08:26:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Attachment #44729|0 |1
is obsolete| |
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44740
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44740&action=edit
patch
"Final" patch. Still runs into the SYMBOL_LANGUAGE issue but I failed to
create a small reproducer (genchecksum is the smallest for now). That is, a
simple
mix of a C and a C++ TU isn't enough to provoke the error.
#1 0x000000000065bf90 in dw2_add_symbol_to_list (symbol=0x12b7900,
listhead=0xfec888 <local_symbols>)
at /space/rguenther/src/binutils-gdb/gdb/dwarf2read.c:9713
9713 gdb_assert ((*listhead) == NULL
(top-gdb) p *(*listhead)->symbol[0]
$2 = {ginfo = {name = 0x1254db2 "errnum", value = {ivalue = 0, block = 0x0,
bytes = 0x0, address = 0x0, common_block = 0x0, chain = 0x0},
language_specific = {obstack = 0x0, demangled_name = 0x0},
language = language_cplus, ada_mangled = 0, section = -1},
type = 0x12b4f20, owner = {symtab = 0x1260d50, arch = 0x1260d50},
domain = VAR_DOMAIN, aclass_index = 18, is_objfile_owned = 1,
is_argument = 0, is_inlined = 0, subclass = SYMBOL_NONE, line = 54,
aux_value = 0x12b5170, hash_next = 0x0}
(top-gdb) p *symbol
$3 = {ginfo = {name = 0x1254db9 "errstr", value = {ivalue = 0, block = 0x0,
bytes = 0x0, address = 0x0, common_block = 0x0, chain = 0x0},
language_specific = {obstack = 0x0, demangled_name = 0x0},
language = language_c, ada_mangled = 0, section = -1}, type = 0x12b4dc0,
owner = {symtab = 0x0, arch = 0x0}, domain = VAR_DOMAIN, aclass_index = 13,
is_objfile_owned = 1, is_argument = 0, is_inlined = 0,
subclass = SYMBOL_NONE, line = 56, aux_value = 0x0, hash_next = 0x0}
I notice that above "errnum" is language_cplus but it is
DW_TAG_formal_parameter
of xstrerror whose early debug language is C. xstrerror is instantiated
in a CU marked as C++ by GCC (unifying C and C++ to C++).
What I see though is
<1><2599>: Abbrev Number: 3 (DW_TAG_subprogram)
<259a> DW_AT_abstract_origin: <0x2434>
<259e> DW_AT_low_pc : 0x401300
<25a6> DW_AT_high_pc : 0x28
<25ae> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<25b0> DW_AT_GNU_all_call_sites: 1
<25b0> DW_AT_sibling : <0x2657>
<2><25b4>: Abbrev Number: 4 (DW_TAG_formal_parameter)
<25b5> DW_AT_abstract_origin: <0x2440>
<25b9> DW_AT_location : 0xf35 (location list)
<25bd> DW_AT_GNU_locviews: 0xf2b
<2><25c1>: Abbrev Number: 5 (DW_TAG_variable)
<25c2> DW_AT_abstract_origin: <0x244c>
<25c6> DW_AT_location : 0xfae (location list)
<25ca> DW_AT_GNU_locviews: 0xfaa
<2><25ce>: Abbrev Number: 7 (DW_TAG_lexical_block)
<25cf> DW_AT_abstract_origin: <0x2434>
<25d3> DW_AT_low_pc : 0x401310
<25db> DW_AT_high_pc : 0x16
<25e3> DW_AT_sibling : <0x2642>
<3><25e7>: Abbrev Number: 4 (DW_TAG_formal_parameter)
<25e8> DW_AT_abstract_origin: <0x2440>
<25ec> DW_AT_location : 0xfef (location list)
<25f0> DW_AT_GNU_locviews: 0xfed
where this abstract origin looks odd. Maybe gdb is confused by that so I'll
try to debug this.
>From gcc-bugs-return-616042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 08:59:49 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Mon, 24 Sep 2018 09:10:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #12)
> Created attachment 44740 [details]
> patch
>
> "Final" patch. Still runs into the SYMBOL_LANGUAGE issue but I failed to
> create a small reproducer (genchecksum is the smallest for now). That is, a
> simple
> mix of a C and a C++ TU isn't enough to provoke the error.
>
> #1 0x000000000065bf90 in dw2_add_symbol_to_list (symbol=0x12b7900,
> listhead=0xfec888 <local_symbols>)
> at /space/rguenther/src/binutils-gdb/gdb/dwarf2read.c:9713
> 9713 gdb_assert ((*listhead) == NULL
> (top-gdb) p *(*listhead)->symbol[0]
> $2 = {ginfo = {name = 0x1254db2 "errnum", value = {ivalue = 0, block = 0x0,
> bytes = 0x0, address = 0x0, common_block = 0x0, chain = 0x0},
> language_specific = {obstack = 0x0, demangled_name = 0x0},
> language = language_cplus, ada_mangled = 0, section = -1},
> type = 0x12b4f20, owner = {symtab = 0x1260d50, arch = 0x1260d50},
> domain = VAR_DOMAIN, aclass_index = 18, is_objfile_owned = 1,
> is_argument = 0, is_inlined = 0, subclass = SYMBOL_NONE, line = 54,
> aux_value = 0x12b5170, hash_next = 0x0}
> (top-gdb) p *symbol
> $3 = {ginfo = {name = 0x1254db9 "errstr", value = {ivalue = 0, block = 0x0,
> bytes = 0x0, address = 0x0, common_block = 0x0, chain = 0x0},
> language_specific = {obstack = 0x0, demangled_name = 0x0},
> language = language_c, ada_mangled = 0, section = -1}, type = 0x12b4dc0,
> owner = {symtab = 0x0, arch = 0x0}, domain = VAR_DOMAIN, aclass_index =
> 13,
> is_objfile_owned = 1, is_argument = 0, is_inlined = 0,
> subclass = SYMBOL_NONE, line = 56, aux_value = 0x0, hash_next = 0x0}
>
> I notice that above "errnum" is language_cplus but it is
> DW_TAG_formal_parameter
> of xstrerror whose early debug language is C. xstrerror is instantiated
> in a CU marked as C++ by GCC (unifying C and C++ to C++).
>
> What I see though is
>
> <1><2599>: Abbrev Number: 3 (DW_TAG_subprogram)
> <259a> DW_AT_abstract_origin: <0x2434>
> <259e> DW_AT_low_pc : 0x401300
> <25a6> DW_AT_high_pc : 0x28
> <25ae> DW_AT_frame_base : 1 byte block: 9c
> (DW_OP_call_frame_cfa)
> <25b0> DW_AT_GNU_all_call_sites: 1
> <25b0> DW_AT_sibling : <0x2657>
> <2><25b4>: Abbrev Number: 4 (DW_TAG_formal_parameter)
> <25b5> DW_AT_abstract_origin: <0x2440>
> <25b9> DW_AT_location : 0xf35 (location list)
> <25bd> DW_AT_GNU_locviews: 0xf2b
> <2><25c1>: Abbrev Number: 5 (DW_TAG_variable)
> <25c2> DW_AT_abstract_origin: <0x244c>
> <25c6> DW_AT_location : 0xfae (location list)
> <25ca> DW_AT_GNU_locviews: 0xfaa
> <2><25ce>: Abbrev Number: 7 (DW_TAG_lexical_block)
> <25cf> DW_AT_abstract_origin: <0x2434>
> <25d3> DW_AT_low_pc : 0x401310
> <25db> DW_AT_high_pc : 0x16
> <25e3> DW_AT_sibling : <0x2642>
> <3><25e7>: Abbrev Number: 4 (DW_TAG_formal_parameter)
> <25e8> DW_AT_abstract_origin: <0x2440>
> <25ec> DW_AT_location : 0xfef (location list)
> <25f0> DW_AT_GNU_locviews: 0xfed
>
> where this abstract origin looks odd. Maybe gdb is confused by that so I'll
> try to debug this.
OK, so the BLOCK structure we have here is
{ Scope block #0 Originating from :#0
char * errstr;
{ Scope block #7 Originating from : static char * xstrerror (int);
int errnum;
{ Scope block #8 Originating from :#0
char * errstr;
}
}
}
which results from early inlining the partial inlining tail... The
abstract origin of #7 is <function_decl 0x7ffff6a84400 xstrerror.part.0>
whose abstract origin is <function_decl 0x7ffff6a84300 xstrerror>.
Somehow this scope isn't marked as inlined_function_outer_scope_p.
We do not have an early debug representative for that BLOCK (of course...)
Then when creating the BLOCK we do
else if (BLOCK_ABSTRACT_ORIGIN (stmt))
{
/* If this is an inlined instance, create a new lexical die for
anything below to attach DW_AT_abstract_origin to. */
if (old_die)
{
stmt_die = new_die (DW_TAG_lexical_block, context_die, stmt);
equate_block_to_die (stmt, stmt_die);
old_die = NULL;
}
tree origin = block_ultimate_origin (stmt);
if (origin != NULL_TREE && origin != stmt)
add_abstract_origin_attribute (stmt_die, origin);
and here block_ultimate_origin "kills" us, refering back to $self.
Using abstract origins for cloning doesn't seem such a great idea in the
end... Well, if this is the underlying issue of gdb's un-happiness. At
least disabling early inlining "fixes" it for what gdb is concerned.
A small testcase would be nice to have for the gdb folks to investigate
but technically there is nothing wrong with the DWARF above?
>From gcc-bugs-return-616043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:10:06 2018
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Subject: [Bug c++/87398] g++ ICE on valid code: tree check: expected record_type or union_type or qual_union_type, have array_type in cxx_eval_constant_expression, at cp/constexpr.c:4820
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-24
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44741
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44741&action=edit
gcc9-pr87398.patch
Untested fix.
>From gcc-bugs-return-616046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:14:22 2018
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Subject: [Bug middle-end/86078] Documentation: missing param default values
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Richi: Is it desired to have the param names sorted in the documentation
alphabetically?
>From gcc-bugs-return-616044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:11:13 2018
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Subject: [Bug c++/87398] [9 Regression] g++ ICE on valid code: tree check: expected record_type or union_type or qual_union_type, have array_type in cxx_eval_constant_expression, at cp/constexpr.c:4820
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|g++ ICE on valid code: tree |[9 Regression] g++ ICE on
|check: expected record_type |valid code: tree check:
|or union_type or |expected record_type or
|qual_union_type, have |union_type or
|array_type in |qual_union_type, have
|cxx_eval_constant_expressio |array_type in
|n, at cp/constexpr.c:4820 |cxx_eval_constant_expressio
| |n, at cp/constexpr.c:4820
>From gcc-bugs-return-616045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:14:21 2018
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Subject: [Bug c/87400] GCC doesn't produce valid frames for stack traces with Thumb-2 (Cortex-M3+)
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
-mapcs-frame predates the Thumb ISA. It does not and cannot support it.
Furthermore, -mapcs-frame is deprecated even for Arm state.
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Subject: [Bug tree-optimization/87402] New: [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645
Date: Mon, 24 Sep 2018 09:20:00 -0000
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Bug ID: 87402
Summary: [9 Regression] ICE in set_ssa_val_to, at
tree-ssa-sccvn.c:3645
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Target Milestone: ---
gcc-9.0.0-alpha20180923 snapshot (r264518) ICEs when compiling the following
snippet w/ -O1 or -Og:
void
xl (int co)
{
int ar = 0;
if (ar != 0)
{
int pp, ll = 0;
int *zx;
if (co == 0)
{
}
else
{
zx = &pp;
if (co < 0)
while (co < 1)
{
to:
while (ll < 1)
++ll;
}
*zx = &ar;
}
}
goto to;
}
% gcc-9.0.0-alpha20180923 -O1 -w -c ycq12qdw.c
during GIMPLE pass: fre
ycq12qdw.c: In function 'xl':
ycq12qdw.c:31:1: internal compiler error: in set_ssa_val_to, at
tree-ssa-sccvn.c:3645
31 | }
| ^
0x6a56d1 set_ssa_val_to
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:3645
0xe731f8 visit_phi
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:4254
0xe7378f visit_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:4297
0xe74d78 process_bb
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:5919
0xe7660f do_rpo_vn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:6622
0xe7776c execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180923/work/gcc-9-20180923/gcc/tree-ssa-sccvn.c:6756
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 09:21:00 -0000
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tnfchris at gcc dot gnu.org
--- Comment #19 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
This change broke the mingw-w64 GCC 8 bootstrap on Windows. The cleanup seems a
bit too aggressive as now `-B ../..` is never passed down to xg++.
See https://github.com/Alexpux/MINGW-packages/pull/3877#issuecomment-408651809
and https://gcc.gnu.org/ml/gcc/2018-07/msg00410.html
Any objections to reverting that part of the change?
So changing it back to
--- a/gnattools/Makefile.in
+++ b/gnattools/Makefile.in
@@ -72,7 +72,7 @@ ADA_INCLUDES_FOR_SUBDIR = -I. -I$(fsrcdir)/ada
# Variables for gnattools, native
TOOLS_FLAGS_TO_PASS_NATIVE= \
"CC=../../xgcc -B../../" \
- "CXX=$(CXX)" \
+ "CXX=$(CXX) -B../../" \
"CFLAGS=$(CFLAGS) $(WARN_CFLAGS)" \
"LDFLAGS=$(LDFLAGS)" \
"ADAFLAGS=$(ADAFLAGS)" \
@@ -90,7 +90,7 @@ TOOLS_FLAGS_TO_PASS_NATIVE= \
# Variables for regnattools
TOOLS_FLAGS_TO_PASS_RE= \
"CC=../../xgcc -B../../" \
- "CXX=$(CXX)" \
+ "CXX=$(CXX) -B../../" \
"CFLAGS=$(CFLAGS)" \
"LDFLAGS=$(LDFLAGS)" \
"ADAFLAGS=$(ADAFLAGS)" \
>From gcc-bugs-return-616049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:21:15 2018
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--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 44742
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44742&action=edit
candidate patch to fix the error reported in comment 5
Hello, Rainer,
Aorry about the regression; I didn't realize __int128 was not available on
32-bit x86 with SSE.
I'm submitting this patch to fix the problem. Please let me know if it doesn't
work for you.
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Subject: [Bug c/87400] GCC doesn't produce valid frames for stack traces with Thumb-2 (Cortex-M3+)
Date: Mon, 24 Sep 2018 09:28:00 -0000
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--- Comment #2 from Alex Kalmuk <alexkalmuk at gmail dot com> ---
I write about mtpcs-frame for thumb, not mapcs-frame, I know the last one for
arm instruction set.
>From gcc-bugs-return-616051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:28:46 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #34 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 44739 [details]
> Reproducer for the second problem.
The test succeeds with r264348+patch of r264485, but not with r264349+patch.
IMO it would be better to open a new PR for it (and close this one as FIXED).
>From gcc-bugs-return-616052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:32:07 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #35 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Dominique d'Humieres from comment #34)
> > Created attachment 44739 [details]
> > Reproducer for the second problem.
>
> The test succeeds with r264348+patch of r264485, but not with r264349+patch.
>
> IMO it would be better to open a new PR for it (and close this one as FIXED).
I am working with r264501 at the moment. I am in the procedure of further
reducing the reproducer but I think it is rather obvious what goes wrong.
>From gcc-bugs-return-616053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:38:20 2018
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 09:38:00 -0000
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--- Comment #20 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 24 Sep 2018, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
>
> Tamar Christina <tnfchris at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |tnfchris at gcc dot gnu.org
>
> --- Comment #19 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> This change broke the mingw-w64 GCC 8 bootstrap on Windows. The cleanup seems a
> bit too aggressive as now `-B ../..` is never passed down to xg++.
>
> See https://github.com/Alexpux/MINGW-packages/pull/3877#issuecomment-408651809
> and https://gcc.gnu.org/ml/gcc/2018-07/msg00410.html
>
> Any objections to reverting that part of the change?
> So changing it back to
>
> --- a/gnattools/Makefile.in
> +++ b/gnattools/Makefile.in
> @@ -72,7 +72,7 @@ ADA_INCLUDES_FOR_SUBDIR = -I. -I$(fsrcdir)/ada
> # Variables for gnattools, native
> TOOLS_FLAGS_TO_PASS_NATIVE= \
> "CC=../../xgcc -B../../" \
> - "CXX=$(CXX)" \
> + "CXX=$(CXX) -B../../" \
> "CFLAGS=$(CFLAGS) $(WARN_CFLAGS)" \
> "LDFLAGS=$(LDFLAGS)" \
> "ADAFLAGS=$(ADAFLAGS)" \
> @@ -90,7 +90,7 @@ TOOLS_FLAGS_TO_PASS_NATIVE= \
> # Variables for regnattools
> TOOLS_FLAGS_TO_PASS_RE= \
> "CC=../../xgcc -B../../" \
> - "CXX=$(CXX)" \
> + "CXX=$(CXX) -B../../" \
> "CFLAGS=$(CFLAGS)" \
> "LDFLAGS=$(LDFLAGS)" \
> "ADAFLAGS=$(ADAFLAGS)" \
But that doesn't make much sense (host driver but "target" cc1plus)
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Subject: [Bug c/87400] GCC doesn't produce valid frames for stack traces with Thumb-2 (Cortex-M3+)
Date: Mon, 24 Sep 2018 09:52:00 -0000
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Alex Kalmuk from comment #2)
> I write about mtpcs-frame for thumb, not mapcs-frame, I know the last one
> for arm instruction set.
The tpcs is also obsolete (the tpcs was replaced by the atpcs more than 20
years ago); the atpcs was superseded by the aapcs about 15 years ago now.
I'm not sure why the tpcs-frame and tpcs-leaf-frame flags weren't removed from
the compiler; they certainly doesn't do anything useful now.
Unfortunately, the aapcs does not define a frame pointer or mandate a frame
layout, which makes backtracing through a frame impossible. Any frame pointer
used by the compiler can only be used within that frame.
>From gcc-bugs-return-616055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 09:52:44 2018
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 10:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
--- Comment #21 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hmm, I see what you mean. Currently though CXX is unable to find the lto
plugin. It's somewhat confusing that CC is set to target and CXX is host (but
reading back on the ticket you pointed that out as well).
So I guess the question is why does CXX not contain all options to find it's
plugins and why does this work on Linux.
Do you happen to know where CXX is set?
>From gcc-bugs-return-616056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 10:01:36 2018
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 10:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
--- Comment #22 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 24 Sep 2018, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
>
> --- Comment #21 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> Hmm, I see what you mean. Currently though CXX is unable to find the lto
> plugin. It's somewhat confusing that CC is set to target and CXX is host (but
> reading back on the ticket you pointed that out as well).
CXX should find the hosts LTO plugin but that should never be necessary
because we do not use the host-compiler to LTO. So maybe _that's_ the
issue - that we use -flto or that we end up linking objects with LTO
bytecode.
And yes, the Ada boostrap setup is quite "wrecked" and doesn't properly
separate host tools from built ones :/
> So I guess the question is why does CXX not contain all options to find it's
> plugins and why does this work on Linux.
>
> Do you happen to know where CXX is set?
CXX is set by the toplevel configure - it's the host compiler (which may
be not GCC)
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 10:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
--- Comment #23 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> > Hmm, I see what you mean. Currently though CXX is unable to find the
> > lto plugin. It's somewhat confusing that CC is set to target and CXX
> > is host (but reading back on the ticket you pointed that out as well).
>
> CXX should find the hosts LTO plugin but that should never be necessary
> because we do not use the host-compiler to LTO. So maybe _that's_ the
> issue - that we use -flto or that we end up linking objects with LTO bytecode.
>
Ah, I didn't know this. I'll go and try to track down the reason it's trying to
use -fuse-linker-plugin then which is likely the problem. Thanks!
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
--- Comment #24 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> This change broke the mingw-w64 GCC 8 bootstrap on Windows. The cleanup
> seems a bit too aggressive as now `-B ../..` is never passed down to xg++.
That shouldn't happen though, see comment #16.
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Subject: [Bug c/87400] GCC doesn't produce valid frames for stack traces with Thumb-2 (Cortex-M3+)
Date: Mon, 24 Sep 2018 10:26:00 -0000
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--- Comment #4 from Alex Kalmuk <alexkalmuk at gmail dot com> ---
Thank you for pointing it out.
So now the alternative is to use .ARM.exidx linker section even for Cortex-M
(or, probably, to use dwarf debugging information on gdb side)?
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Subject: [Bug c++/87403] New: Issues that suggest a new warning
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 10:31:00 -0000
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--- Comment #25 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
>> This change broke the mingw-w64 GCC 8 bootstrap on Windows. The cleanup
>> seems a bit too aggressive as now `-B ../..` is never passed down to xg++.
>
> That shouldn't happen though, see comment #16.
The error one of the users reported is
https://user-images.githubusercontent.com/216319/40851484-dbb095da-65c7-11e8-9b98-94ca80ab2b23.png
Which does indeed show that during the bootstrap -B to the right directory is
passed, and that the file is there. So not sure why it's saying it can't find
it. If that's the case that the paths are all correct, I'll go look into why
it's giving a file not found while the file is there.
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Subject: [Bug ada/87396] ada/gcc-interface/decl.c:8798:53:Value Conversion Issue: implicit conversion from 'int' to 'char' changes value from 132 to -124: -Wconstant-conversion
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon Sep 24 10:29:07 2018
New Revision: 264525
URL: https://gcc.gnu.org/viewcvs?rev=264525&root=gcc&view=rev
Log:
PR ada/87396
* fe.h (Get_Attribute_Definition_Clause): Use 'unsigned char' instead
of 'char' as the type of the second parameter.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/fe.h
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Subject: [Bug ada/87396] ada/gcc-interface/decl.c:8798:53:Value Conversion Issue: implicit conversion from 'int' to 'char' changes value from 132 to -124: -Wconstant-conversion
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362
--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
<2><25ce>: Abbrev Number: 7 (DW_TAG_lexical_block)
<25cf> DW_AT_abstract_origin: <0x2434>
<25d3> DW_AT_low_pc : 0x401310
<25db> DW_AT_high_pc : 0x16
<25e3> DW_AT_sibling : <0x2642>
<3><25e7>: Abbrev Number: 4 (DW_TAG_formal_parameter)
<25e8> DW_AT_abstract_origin: <0x2440>
<25ec> DW_AT_location : 0xfef (location list)
<25f0> DW_AT_GNU_locviews: 0xfed
the issue is probably the DW_TAG_formal_parameter DIE here which gdb likely
doesn't expect as child of a DW_TAG_lexical_block. Nope, forcing it to
be a DW_TAG_variable doesn't help.
So we fail to output this as inlined function body because the location
of the call of the split part is UNKNOWN_LOCATION and we have
static inline bool
inlined_function_outer_scope_p (const_tree block)
{
return LOCATION_LOCUS (BLOCK_SOURCE_LOCATION (block)) != UNKNOWN_LOCATION;
}
so inlined split parts are _not_ inlined_function_outer_scope_p. But then
this should reproduce w/o LTO (debug) as well. The inlining happens at IPA
time btw. Maybe this was desired somehow (the ipa-split.c code doesn't have
a comment reflecting that though).
As said, both issues should be latent ... indeed the issue happens
in genchecksum unpatched as well.
OK, so I think this is a gdb issue in that read_func_scope doesn't seem to
be prepared to handle the case that this concrete instance is from a CU
with a different language and parameter DIEs are processed not the same
as variables in contained scopes with respect to setting the language.
Not sure why exactly this doesn't show more often (or w/o the patch) is
a mystery to me... (recursive inlining might show a similar "pattern",
but eventually the inlined-subroutine path has a similar behavior for
those dups).
So we might be able to fix that by using DW_TAG_inlined_subroutine (will
check that). That seems to help.
Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c (revision 264418)
+++ gcc/tree-inline.c (working copy)
@@ -4531,6 +4531,8 @@ expand_call_inline (basic_block bb, gimp
BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
BLOCK_SOURCE_LOCATION (id->block)
= LOCATION_LOCUS (gimple_location (stmt));
+ if (LOCATION_LOCUS (gimple_location (stmt)) == UNKNOWN_LOCATION)
+ BLOCK_SOURCE_LOCATION (id->block) = BUILTINS_LOCATION;
prepend_lexical_block (gimple_block (stmt), id->block);
}
That will of course cause gdb to step into foo itself if foo was split
and later re-merged by inlining.
Of course it's still a gdb bug and the above is only a workaround (well,
IMNSHO).
Tom - maybe you can have a look what it would take to make gdb handle
symbol language "correctly" here (it all seems to be messed up a bit).
For example if I have an DW_TAG_inlined_subroutine gdb doesn't switch
to the callees language when that differs from the caller.
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Subject: [Bug c++/87404] New: Implement -Wenum-compare and -Wenum-compare-switch
Date: Mon, 24 Sep 2018 10:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87404
Bug ID: 87404
Summary: Implement -Wenum-compare and -Wenum-compare-switch
Product: gcc
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As I wrote to Martin Jambor privately, the warning found a real issue:
/home/marxin/Programming/gcc/gcc/omp-grid.c:1063:15:Semantic Issue: comparison
of two values with different enumeration types in switch statement ('enum
tree_code' and 'omp_clause_code'): -Wenum-compare-switch
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
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Subject: [Bug c++/87404] Implement -Wenum-compare and -Wenum-compare-switch
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It comes from Clang, where there's no documentation, only a warning message:
-Wenum-compare: comparison of two values with different enumeration types
-Wenum-compare-switch: comparison of two values with different enumeration
types in switch statement
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Subject: [Bug c++/87405] New: Implement -Wliteral-conversion
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Bug ID: 87405
Summary: Implement -Wliteral-conversion
Product: gcc
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Also coming from LLVM, it found a real issue in GCC:
gcc/ipa-fnsummary.c:2745:54:Value Conversion Issue: implicit conversion from
'double' to 'int64_t' (aka 'long') changes value from 0.99 to 0:
-Wliteral-conversion
I would consider adding that to GCC as well.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
>From gcc-bugs-return-616068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 10:39:42 2018
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Subject: [Bug c++/87406] New: Implement -Wconstant-conversion and -Wbitfield-constant-conversion
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87406
Bug ID: 87406
Summary: Implement -Wconstant-conversion and
-Wbitfield-constant-conversion
Product: gcc
Version: 9.0
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It's also from LLVM, one bug that was seen by that:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87396
Example of error message:
implicit conversion from 'int' to 'char' changes value from 132 to -124
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
>From gcc-bugs-return-616069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 10:44:05 2018
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Subject: [Bug c++/87407] New: Enhance -Wunused-function to handle also inline functions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
Bug ID: 87407
Summary: Enhance -Wunused-function to handle also inline
functions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
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We properly warn about:
$ cat /tmp/unused.c
static void foo()
{
}
$ gcc /tmp/unused.c -c -Wall
/tmp/unused.c:1:13: warning: ‘foo’ defined but not used [-Wunused-function]
static void foo()
^~~
but not about:
$ cat /tmp/unused.c
static inline void foo()
{
}
Clang does that:
$ clang /tmp/unused.c -c -Wall
/tmp/unused.c:1:20: warning: unused function 'foo' [-Wunused-function]
static inline void foo()
^
1 warning generated.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note I ran into this bug with clang with the vpp project sources too.
>From gcc-bugs-return-616070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 10:47:14 2018
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is done on purpose as static inline functions are located in many headers
files including gcc's.
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Subject: [Bug c++/87403] Issues that suggest a new warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
Bug 87403 depends on bug 87407, which changed state.
Bug 87407 Summary: Enhance -Wunused-function to handle also inline functions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
Date: Mon, 24 Sep 2018 10:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Andrew I don't get it. Can you please explain why it does not make sense to
warn e.g. about function that are declared in a .c file (not header file)?
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 10:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878
--- Comment #26 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Which does indeed show that during the bootstrap -B to the right directory
> is passed, and that the file is there. So not sure why it's saying it can't
> find it. If that's the case that the paths are all correct, I'll go look
> into why it's giving a file not found while the file is there.
Yes, the expected -B flag is present in the screen dump right after
-Wl,--stack.
Are you positive that your change in comment #19 eliminates the problem?
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Subject: [Bug c++/87408] New: Enhance -Wunused-value to catch more complex expressions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87408
Bug ID: 87408
Summary: Enhance -Wunused-value to catch more complex
expressions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 87403
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For the following example:
$ cat /tmp/test.C
struct A
{
int a;
};
A mya;
static A *get() { return &mya; }
int main()
{
A *p = get ();
p->a; // issue #1
get ()->a; // issue #2
return 0;
}
GCC only catches only one issue, clang both of them:
$ g++ /tmp/test.C -Wall -Wextra
/tmp/test.C: In function ‘int main()’:
/tmp/test.C:13:6: warning: statement has no effect [-Wunused-value]
p->a;
~~~^
$ clang++ /tmp/test.C -Wall -Wextra
/tmp/test.C:13:6: warning: expression result unused [-Wunused-value]
p->a;
~ ^
/tmp/test.C:15:11: warning: expression result unused [-Wunused-value]
get ()->a;
~~~~~~ ^
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
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Subject: [Bug c++/87409] New: Implement -Wunused-private-field
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87409
Bug ID: 87409
Summary: Implement -Wunused-private-field
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
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The warning is reported by clang, can help to remove an unused code.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] Issues that suggest a new warning
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Subject: [Bug c++/87409] Implement -Wunused-private-field
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Example:
private field 'm_next' is not used: -Wunused-private-field
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Like these addressed here:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01317.html
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Subject: [Bug c++/87409] Implement -Wunused-private-field
Date: Mon, 24 Sep 2018 10:58:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note removal of private fields can change the ABI of a structure so this
warning should never be turned on by -Wextra or -Wall.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also I don't see how this warning can be implemented without seeing all
functions and implementation of functions for a class which dont need to be in
a header.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
Date: Mon, 24 Sep 2018 11:04:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Test the warning out on clang from a header file and you will see you get the
warning in the header too. As I said I actually ran into this while working on
the vpp project and cursed clang for having this warning turned on.
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Subject: [Bug middle-end/87054] misaligned asm output is turned into dereferenced pointer-to-aligned
Date: Mon, 24 Sep 2018 11:04:00 -0000
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--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Mon Sep 24 11:03:34 2018
New Revision: 264526
URL: https://gcc.gnu.org/viewcvs?rev=264526&root=gcc&view=rev
Log:
[PR87054] adjust testcase for 32-bit x86
The test assumed __int128 to be available whenever __SSE__ was
defined, but this assumption doesn't hold on 32-bit x86. Fixed.
for gcc/testsuite/ChangeLog
PR middle-end/87054
* gcc.dg/pr87054.c: Adjust for no __int128 on x86.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr87054.c
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Subject: [Bug c++/87409] Implement -Wunused-private-field
Date: Mon, 24 Sep 2018 11:05:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Sure, has limitations, but it was able to catch some dead code in GCC source
files.
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Subject: [Bug c++/87404] Implement -Wenum-compare and -Wenum-compare-switch
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
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--- Comment #27 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> Yes, the expected -B flag is present in the screen dump right after -Wl,--stack.
> Are you positive that your change in comment #19 eliminates the problem?
Aaahh Yes, and now I understand what the problem is.. as
https://github.com/Alexpux/MINGW-packages/pull/3877#issuecomment-408660810
points out, gnatlink is a shell script on non-Windows but on Windows it's a
program. this means it's interpreting the unix paths incorrectly `/home` is
then interpreted by the Windows API. I hadn't understood the comment fully
until now that I knew how it's supposed to work...
The `../..` works because that's a valid path for both.. Not sure why gnatlink
isn't a shell script on Windows too..
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Subject: [Bug c++/87405] Implement -Wliteral-conversion
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Subject: [Bug c++/87403] [Meta-bug] Issues that suggest a new warning
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think we should use a keyword for this one instead of a meta-bug as this bug
will always be open.
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-616092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 11:10:34 2018
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think for C++ (which is the component this bug was created for, even if
comment 0 only has C examples) it makes sense to warn even for static inline
functions in headers ... why would you want to define them in headers?
In C++ they should probably just be inline, not static inline.
Even if we don't want the warning for headers, it does make sense for functions
defined in .C files.
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Bug 87403 depends on bug 87407, which changed state.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Again I ran into this stupid bug in clang and had to use preprocessor macros to
work around it.
I dont think we should change the behavior of gcc of this warning at all. In
fact as I said I ran into a bug due to it suggestion in clang.
>From gcc-bugs-return-616094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 11:12:40 2018
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Subject: [Bug c++/87408] Enhance -Wunused-value to catch more complex expressions
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Our warning talks about the statement, and without interprocedural analysis it
can't see that get() doesn't have an effect. Clang's warning is better because
it doesn't say anything about whether get() has an effect, just that get()->a
doesn't use the result of the class member access.
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Subject: [Bug c++/87403] [Meta-bug] Issues that suggest a new warning
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Bug 87403 depends on bug 87407, which changed state.
Bug 87407 Summary: Enhance -Wunused-function to handle also inline functions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
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----------------------------------------------------------------------------
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>From gcc-bugs-return-616097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 11:18:21 2018
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Subject: [Bug c++/87409] Implement -Wunused-private-field
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, it can only warn when there are no member functions that aren't defined in
the current TU. Even then, it might need additional work to check at the end of
a TU if there are non-inline function definitions:
struct A {
A();
void f();
private:
int i = 0;
};
A::A() { }
void A::f() { }
Here we'd need to do the check at the end of the TU, after everything has been
defined. Clang does warn for this example.
Clang suppresses the warning if the member declaration has attribute unused,
which we would need to do too.
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why do you want to have static inline functions in headers in C++?
Why do you want to have static inline functions NOT in headers in C++?
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
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--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It was in a header file. Clang still earned about it.
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
Date: Mon, 24 Sep 2018 11:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85774
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Sep 24 11:22:38 2018
New Revision: 264528
URL: https://gcc.gnu.org/viewcvs?rev=264528&root=gcc&view=rev
Log:
Unpoison variable partition properly (PR sanitizer/85774).
2018-09-24 Martin Liska <mliska@suse.cz>
PR sanitizer/85774
* asan.c: Make asan_handled_variables extern.
* asan.h: Likewise.
* cfgexpand.c (expand_stack_vars): Make sure
a representative is unpoison if another
variable in the partition is handled by
use-after-scope sanitization.
2018-09-24 Martin Liska <mliska@suse.cz>
PR sanitizer/85774
* g++.dg/asan/pr85774.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/asan/pr85774.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/asan.c
trunk/gcc/asan.h
trunk/gcc/cfgexpand.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Target Milestone|--- |8.3
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
Date: Mon, 24 Sep 2018 11:35:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |NEW
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Severity|normal |enhancement
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's not what I asked.
Anyway, see comment 3. We're not talking about what Clang does, we're asking
why it would be invalid for GCC to implement this warning. Maybe it would make
sense only for code that is not in headers (IMHO it makes sense in headers too,
which is why I asked why you want such code in headers, but I could accept
having the warning only for code outside headers).
Insisting it's stupid to warn about code in headers doesn't make it invalid to
warn about code outside headers. Please address the questions instead of just
closing it again.
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Subject: [Bug c++/87404] Implement -Wenum-compare and -Wenum-compare-switch
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Mon, 24 Sep 2018 11:50:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
So with all this (the patch) LTO debuginfo looks much nicer (and is smaller)
but that doesn't help gdb to consume less memory or be faster at startup.
*sigh*
I guess that the DW_TAG_imported_unit DIEs causes it to pull in everything
up-front somehow while w/o LTO much more debuginfo is processed lazily.
Well, wild guessing...
Anyhow, testing a patch to inlined_function_outer_scope_p for the original
issue (looking at BLOCK_ABSTRACT_ORIGIN rather than BLOCK_SOURCE_LOCATION).
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Subject: [Bug c++/87403] [Meta-bug] Issues that suggest a new warning
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Bug 87403 depends on bug 87407, which changed state.
Bug 87407 Summary: Enhance -Wunused-function to handle also inline functions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug c++/87406] Implement -Wconstant-conversion and -Wbitfield-constant-conversion
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Last reconfirmed| |2018-09-24
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Severity|normal |enhancement
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Subject: [Bug c++/87406] Implement -Wconstant-conversion and -Wbitfield-constant-conversion
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We do warn about this, but only with -Wconversion which is not in -Wall or
-Wextra
c.cc:1:24: warning: conversion to ‘char’ from ‘int’ may alter its value
[-Wconversion]
char f(int i) { return i; }
^
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
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--- Comment #28 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Aaahh Yes, and now I understand what the problem is.. as
> https://github.com/Alexpux/MINGW-packages/pull/3877#issuecomment-408660810
> points out, gnatlink is a shell script on non-Windows but on Windows it's a
> program. this means it's interpreting the unix paths incorrectly `/home` is
> then interpreted by the Windows API. I hadn't understood the comment fully
> until now that I knew how it's supposed to work...
gnatlink is _never_ a shell script though but, yes, it's apparently the usual
mess with Unix paths on Windows.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about
Date: Mon, 24 Sep 2018 13:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #15)
> So with all this (the patch) LTO debuginfo looks much nicer (and is smaller)
> but that doesn't help gdb to consume less memory or be faster at startup.
> *sigh*
>
> I guess that the DW_TAG_imported_unit DIEs causes it to pull in everything
> up-front somehow while w/o LTO much more debuginfo is processed lazily.
> Well, wild guessing...
>
> Anyhow, testing a patch to inlined_function_outer_scope_p for the original
> issue (looking at BLOCK_ABSTRACT_ORIGIN rather than BLOCK_SOURCE_LOCATION).
Bah - NOTE_INSN_INLINE_ENTRY throws a wrench into this...
The only option looks like assigning a proper location to the call stmt
in the first place. The BUILTINS_LOCATION hack wouldn't work either there.
Well, just record the BLOCK directly for NOTE_INSN_INLINE_ENTRY ... somehow.
I was talking about doing the following:
Index: gcc/tree.h
===================================================================
--- gcc/tree.h (revision 264534)
+++ gcc/tree.h (working copy)
@@ -4749,7 +4749,8 @@ function_args_iter_next (function_args_i
static inline bool
inlined_function_outer_scope_p (const_tree block)
{
- return LOCATION_LOCUS (BLOCK_SOURCE_LOCATION (block)) != UNKNOWN_LOCATION;
+ return (BLOCK_ABSTRACT_ORIGIN (block)
+ && TREE_CODE (BLOCK_ABSTRACT_ORIGIN (block)) == FUNCTION_DECL);
}
/* Loop over all function arguments of FNTYPE. In each iteration, PTR is set
The only "sensible" location for the call to the split part I can statically
come up with is DECL_SOURCE_LOCATION given we already use DECL_INITIAL for
its block ... "better" would likely be a location/block from somewhere around
the split region.
>From gcc-bugs-return-616110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 13:03:33 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/70230] 11 test regressions when building GCC 6 with --enable-default-ssp
Date: Mon, 24 Sep 2018 13:51:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
Ever confirmed|0 |1
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
I also saw
FAIL: gcc.target/i386/cleanup-1.c execution test
FAIL: gcc.target/i386/cleanup-2.c execution test
on trunk with --enable-default-ssp. They contain asm statements which
aren't compatible with -fstack-protector. Adding -fno-stack-protector:
diff --git a/gcc/testsuite/gcc.target/i386/cleanup-1.c
b/gcc/testsuite/gcc.target/i386/cleanup-1.c
index dcfcc4edb5f..4a74ec2fb0f 100644
--- a/gcc/testsuite/gcc.target/i386/cleanup-1.c
+++ b/gcc/testsuite/gcc.target/i386/cleanup-1.c
@@ -1,5 +1,5 @@
/* { dg-do run { target *-*-linux* *-*-gnu* } } */
-/* { dg-options "-fexceptions -fnon-call-exceptions
-fasynchronous-unwind-tables -O2" } */
+/* { dg-options "-fno-stack-protector -fexceptions -fnon-call-exceptions
-fasynchronous-unwind-tables -O2" } */
/* Test complex CFA value expressions. */
#include <unwind.h>
diff --git a/gcc/testsuite/gcc.target/i386/cleanup-2.c
b/gcc/testsuite/gcc.target/i386/cleanup-2.c
index 7e60323373b..d4cf30984e4 100644
--- a/gcc/testsuite/gcc.target/i386/cleanup-2.c
+++ b/gcc/testsuite/gcc.target/i386/cleanup-2.c
@@ -1,5 +1,5 @@
/* { dg-do run { target { *-*-linux* && { ! ia32 } } } } */
-/* { dg-options "-fexceptions -fnon-call-exceptions
-fasynchronous-unwind-tables -O2" } */
+/* { dg-options "-fno-stack-protector -fexceptions -fnon-call-exceptions
-fasynchronous-unwind-tables -O2" } */
/* Test complex CFA value expressions. */
#include <unwind.h>
fixed them.
>From gcc-bugs-return-616111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 13:51:16 2018
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Subject: [Bug c++/87410] New: internal compiler error: in fold_convert_loc, at fold-const.c:2530
Date: Mon, 24 Sep 2018 14:06:00 -0000
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Bug ID: 87410
Summary: internal compiler error: in fold_convert_loc, at
fold-const.c:2530
Product: gcc
Version: 8.2.1
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Created attachment 44743
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44743&action=edit
XZ archive of preprocessed source
Self-contained repro attached - g++ -std=c++17 repro.cpp is enough to trigger
it
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Subject: [Bug target/87411] New: -fcf-protection -mindirect-branch=thunk incorrectly
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87411
Bug ID: 87411
Summary: -fcf-protection -mindirect-branch=thunk incorrectly
Product: gcc
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>From gcc-bugs-return-616112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:06:36 2018
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Subject: [Bug target/82699] ENDBR isn't generated at function entrance (with -mfentry)
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Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ENDBR isn't generated at |ENDBR isn't generated at
|function entrance |function entrance (with
| |-mfentry)
--- Comment #6 from Florian Weimer <fw at gcc dot gnu.org> ---
What's the status of this bug?
>From gcc-bugs-return-616115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:14:24 2018
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Subject: [Bug target/87412] New: -fcf-protection and -mindirect-branch=thunk are incompatible on x86_64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87412
Bug ID: 87412
Summary: -fcf-protection and -mindirect-branch=thunk are
incompatible on x86_64
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: fw at gcc dot gnu.org
Target Milestone: ---
Target: x86_64
Consider this test program:
__attribute__ ((weak))
int
f1 (int (*f2) (void))
{
return f2 ();
}
int
f2 (void)
{
}
int
main (void)
{
f1 (f2);
}
Compiled with “-O2 -mindirect-branch=thunk -fcf-protection -câ€, we get an
object file which has:
Displaying notes found in: .note.gnu.property
Owner Data size Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: x86 feature: IBT, SHSTK
But also:
0000000000000000 <__x86_indirect_thunk_rdi>:
0: e8 07 00 00 00 callq c <__x86_indirect_thunk_rdi+0xc>
5: f3 90 pause
7: 0f ae e8 lfence
a: eb f9 jmp 5 <__x86_indirect_thunk_rdi+0x5>
c: 48 89 3c 24 mov %rdi,(%rsp)
10: c3 retq
The retq will trap on CET-capable hardware because the shadow stack says it
should return to address 7, and not to the address in %rdi.
Seen with: xgcc (GCC) 9.0.0 20180924 (experimental)
Suggested fix is to error out when both options are specified at the same time.
>From gcc-bugs-return-616114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:09:31 2018
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Subject: [Bug target/87411] -fcf-protection -mindirect-branch=thunk incorrectly marked as CET
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Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
Summary|-fcf-protection |-fcf-protection
|-mindirect-branch=thunk |-mindirect-branch=thunk
|incorrectly |incorrectly marked as CET
--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
Hit submit too soon.
>From gcc-bugs-return-616116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:14:50 2018
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Subject: [Bug target/83970] -mindirect-branch=thunk -fno-plt generates CET-incompatible thunk
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--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
Bug 87412 is a related issue, but without -fno-plt.
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From: "iii at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80080] S390: Isses with emitted cs-instructions for __atomic builtins.
Date: Mon, 24 Sep 2018 14:32:00 -0000
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--- Comment #15 from iii at gcc dot gnu.org ---
Author: iii
Date: Mon Sep 24 14:21:03 2018
New Revision: 264535
URL: https://gcc.gnu.org/viewcvs?rev=264535&root=gcc&view=rev
Log:
S/390: Fix conditional returns on z196+
S/390 epilogue ends with (parallel [(return) (use %r14)]) instead of
the more usual (return) or (simple_return). This sequence is not
recognized by the conditional return logic in try_optimize_cfg ().
This was introduced for processors older than z196, where it is
sometimes profitable to use call-clobbered register for returning
instead of %r14. On newer processors we always return via %r14,
for which the fact that it's used is already reflected by
EPILOGUE_USES. In this case a simple (return) suffices.
This patch changes return_use () to emit simple (return)s when
returning via %r14. The resulting sequences are recognized by the
conditional return logic in try_optimize_cfg ().
gcc/ChangeLog:
2018-09-24 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* config/s390/s390.c (s390_emit_epilogue): Do not use PARALLEL
RETURN+USE when returning via %r14.
gcc/testsuite/ChangeLog:
2018-09-24 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* gcc.target/s390/risbg-ll-3.c: Expect conditional returns.
* gcc.target/s390/zvector/vec-cmp-2.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/s390/risbg-ll-3.c
trunk/gcc/testsuite/gcc.target/s390/zvector/vec-cmp-2.c
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Subject: [Bug target/87369] [9 Regression] Regression on aarch64/copysign-bsl.c since r264264
Date: Mon, 24 Sep 2018 14:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
Summary|Regression on |[9 Regression] Regression
|aarch64/copysign-bsl.c |on aarch64/copysign-bsl.c
|since r264264 |since r264264
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Subject: [Bug middle-end/87370] Regression in return struct code
Date: Mon, 24 Sep 2018 14:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-* i?86-*-*
CC| |hjl at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I belive there's a duplicate for this.
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Subject: [Bug target/87412] -fcf-protection and -mindirect-branch=thunk are incompatible on x86_64
Date: Mon, 24 Sep 2018 14:38:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
CC| |hjl.tools at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Florian Weimer from comment #0)
>
> Suggested fix is to error out when both options are specified at the same
> time.
Yes, -fcf-protection and -mindirect-branch=thunk should be disallowed
when used together.
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Subject: [Bug target/82699] ENDBR isn't generated at function entrance (with -mfentry)
Date: Mon, 24 Sep 2018 14:40:00 -0000
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--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Florian Weimer from comment #6)
> What's the status of this bug?
My patch is still unreviewed:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01341.html
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Subject: [Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled
Date: Mon, 24 Sep 2018 14:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
There doesn't seem to be any bug here just discussion belonging to gcc-help.
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Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm
Target Milestone|--- |8.3
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Subject: [Bug middle-end/87370] Regression in return struct code
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
CC|hjl at gcc dot gnu.org |hjl.tools at gmail dot com
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
For
f2 ()
{
struct B D.2315;
;; basic block 2, loop depth 0
;; pred: ENTRY
D.2315 = {};
return D.2315;
;; succ: EXIT
}
C++ front-end generates:
(insn 5 2 6 2 (set (mem/j/c:TI (plus:DI (reg/f:DI 78 virtual-stack-vars)
(const_int -16 [0xfffffffffffffff0])) [0 D.2315+0 S16 A128])
(const_int 0 [0])) "x.ii":8 -1
(nil))
(insn 6 5 7 2 (set (reg:DI 85)
(mem/j/c:DI (plus:DI (reg/f:DI 78 virtual-stack-vars)
(const_int -16 [0xfffffffffffffff0])) [0 D.2315+0 S8 A128]))
"x.
ii":8 -1
(nil))
(insn 7 6 8 2 (set (reg:DI 86)
(mem/j/c:DI (plus:DI (reg/f:DI 78 virtual-stack-vars)
(const_int -8 [0xfffffffffffffff8])) [0 D.2315+8 S8 A64]))
"x.ii
":8 -1
(nil))
(insn 8 7 9 2 (set (reg:DI 83 [ <retval> ])
(reg:DI 85)) "x.ii":8 -1
(nil))
(insn 9 8 13 2 (set (reg:DI 84 [ <retval>+8 ])
(reg:DI 86)) "x.ii":8 -1
(nil))
(insn 13 9 14 2 (set (reg:DI 0 ax)
(reg:DI 83 [ <retval> ])) "x.ii":9 -1
(nil))
(insn 14 13 15 2 (set (reg:DI 1 dx)
(reg:DI 84 [ <retval>+8 ])) "x.ii":9 -1
(nil))
(insn 15 14 16 2 (use (reg:DI 0 ax)) "x.ii":9 -1
(nil))
(insn 16 15 0 2 (use (reg:DI 1 dx)) "x.ii":9 -1
(nil))
Why can't C++ front-end generate better RTL?
>From gcc-bugs-return-616125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:45:54 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/67629] bogus -Wreturn-type in a function with tautological if-else
Date: Mon, 24 Sep 2018 14:47:00 -0000
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--- Comment #8 from Matthew Woehlke <mwoehlke.floss at gmail dot com> ---
Given what -Wreturn-type is trying to accomplish, I wonder if a "delayed
issuance" strategy would be in order? IOW, have the front end "trigger" the
warning, as now, but stuff it in a queue or such, continue on with
optimization, then go back and check the queue to see if the warning still
looks legitimate, and only *then* emit it.
Where this gets sticky is that at -O0, we still may not know that the warning
is spurious. We might, ideally, want to perform optimization anyway on a
function with a "pending" -Wreturn-type warning, but throw out the result.
>From gcc-bugs-return-616126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:47:03 2018
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Subject: [Bug c++/87386] [8/9 Regression] Error message for static_assert show wrong range
Date: Mon, 24 Sep 2018 14:48:00 -0000
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>From gcc-bugs-return-616127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:49:00 2018
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Subject: [Bug c++/87413] New: strlen accepted in array declaration
Date: Mon, 24 Sep 2018 14:50:00 -0000
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Bug ID: 87413
Summary: strlen accepted in array declaration
Product: gcc
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$ cat test.c
#include <string.h>
char x[strlen("test")];
int test ()
{
return sizeof(x);
}
$ gcc -Wall -S test.c
test.c:2:6: error: variably modified 'x' at file scope
2 | char x[strlen("test")];
| ^
which is okay.
But:
$ gcc -S -x c++ -Wall test.c
$ cat test.s
.file "test.c"
.text
.globl x
.bss
.type x, @object
.size x, 4
x:
.zero 4
.text
.globl _Z4testv
.type _Z4testv, @function
_Z4testv:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movl $4, %eax
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
This was previously rejected:
$ gcc-4.8 -x c++ -S test.c
test.c:2:22: error: array bound is not an integer constant before ‘]’ token
char x[strlen("test")];
^
test.c: In function ‘int test()’:
test.c:5:17: error: ‘x’ was not declared in this scope
return sizeof(x);
^
I think this should be invalid.
Interestingly, this modified example was accepted as C and rejected as C++
by gcc-4.8
$ cat test1.c
char x[__builtin_strlen("test")];
int test ()
{
return sizeof(x);
}
$ gcc-4.8 -S test.c
$ gcc-4.8 -x c++ -S test.c
test.c:2:22: error: array bound is not an integer constant before ‘]’ token
char x[strlen("test")];
^
test.c: In function ‘int test()’:
test.c:5:17: error: ‘x’ was not declared in this scope
return sizeof(x);
^
>From gcc-bugs-return-616128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:50:26 2018
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Subject: [Bug c++/87393] [8/9 Regression] gcc/cp/parser.c:13967:37:Unused Entity Issue: expression result unused: -Wunused-value since r251026
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Subject: [Bug c/82272] RFE: request a warning for (<nonbool> == <bool>) etc.
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
The proposal was discussed at the spring 2018 WG14 meeting in Brno. There was
strong support for making the change (the details of the discussion and the
straw poll are in the meeting minutes:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2239.pdf).
>From gcc-bugs-return-616131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:53:20 2018
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
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----------------------------------------------------------------------------
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Subject: [Bug c++/87399] Inconsistent determination of what is usable in a constant expression with __PRETTY_FUNCTION__
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
IIRC there's a duplicate about __PRETTY_FUNCTION__ and constexpr.
>From gcc-bugs-return-616132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 14:53:43 2018
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Subject: [Bug tree-optimization/87402] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug c++/87413] strlen accepted in array declaration
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--- Comment #1 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
so current trunk accepts the variant test1.c with __builtin_strlen
both C and C++:
$ gcc -Wall -S test1.c
$ gcc -x c++ -Wall -S test1.c
Don't know it that is valid.
>From gcc-bugs-return-616134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 15:00:58 2018
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
Date: Mon, 24 Sep 2018 15:11:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's probably inconvenient for C indeed (pre-dating C99 inline). Even GCC has
too many static inlines in headers.
I agree that we can warn for static inline declarations with locations that
are not in any included file (not sure how exactly to verify that).
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Subject: [Bug target/87414] New: -mindirect-branch=thunk produces thunk with incorrect CFI on x86_64
Date: Mon, 24 Sep 2018 15:18:00 -0000
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Bug ID: 87414
Summary: -mindirect-branch=thunk produces thunk with incorrect
CFI on x86_64
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
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Target: x86_64
GCC 9.0.0 (20180924) generates these thunks on x86-64:
__x86_indirect_thunk_rdi:
.LFB1:
.cfi_startproc
call .LIND1
.LIND0:
pause
lfence
jmp .LIND0
.LIND1:
mov %rdi, (%rsp)
ret
.cfi_endproc
.LFE1:
I don't think the CFI is correct. At the ret instruction, the CFI
indicates that the return address is at the top of the stack. The
unwinder will use this return address and subtract one because it's a
non-signal handler frame. But the resulting address is located before
the start of the function, so it will locate an incorrect FDE based on
it.
Indeed I see this when si-stepping through the execution with GDB:
(gdb) disas
Dump of assembler code for function __x86_indirect_thunk_rdi:
0x00000000004004a5 <+0>: callq 0x4004b1 <__x86_indirect_thunk_rdi+12>
0x00000000004004aa <+5>: pause
0x00000000004004ac <+7>: lfence
0x00000000004004af <+10>: jmp 0x4004aa <__x86_indirect_thunk_rdi+5>
0x00000000004004b1 <+12>: mov %rdi,(%rsp)
=> 0x00000000004004b5 <+16>: retq
0x00000000004004b6 <+17>: nopw %cs:0x0(%rax,%rax,1)
(gdb) bt
#0 0x00000000004004b5 in __x86_indirect_thunk_rdi ()
#1 0x0000000000400490 in frame_dummy () at /tmp/cfi.c:16
#2 0x000000000040038e in main () at /tmp/cfi.c:16
End of assembler dump.
(gdb) print f2
$1 = {int (void)} 0x400490 <f2>
Note the “frame_dummy†instead of “f2†in the backtrace.
Test program:
__attribute__ ((weak))
int
f1 (int (*f2) (void))
{
return f2 ();
}
int
f2 (void)
{
}
int
main (void)
{
f1 (f2);
}
We had a bit of an internal debate whether it's actually possible to produce
correct CFI for this. I think we can reflect the stack pointer adjustment
after the thunk-internal call in the CFI, so that the unwinder continues to see
the original caller of the thunk. Due to the address decrement, this needs to
happen for the jmp instruction, not after the .LIND1 label.
As an alternative, it would be possible to error out when
-mindirect-branch=thunk is used with -fasynchronous-unwind-tables, but since
the latter is the default, this would be a bit harsh.
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Subject: [Bug c++/87413] strlen accepted in array declaration
Date: Mon, 24 Sep 2018 15:41:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's a GNU extension in C++, so we can decide whether it's valid or not.
>From gcc-bugs-return-616137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 15:41:47 2018
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Subject: [Bug c++/87399] Inconsistent determination of what is usable in a constant expression with __PRETTY_FUNCTION__
Date: Mon, 24 Sep 2018 15:42:00 -0000
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--- Comment #2 from eric-bugs at omnifarious dot org ---
This bug is far more succinct than the one I filed. I'll mark mine as the dupe
even though this one was filed later.
>From gcc-bugs-return-616139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 15:43:32 2018
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Subject: [Bug c++/87381] clang 6.0 will compile this constexpr construct, but gcc 8.2.1 will not.
Date: Mon, 24 Sep 2018 15:43:00 -0000
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--- Comment #6 from eric-bugs at omnifarious dot org ---
Someone filed a bug in response to a StackOverflow question I asked, and their
bug is much more succinct and clear than this one is. Marking this one as a
dupe.
*** This bug has been marked as a duplicate of bug 87399 ***
>From gcc-bugs-return-616138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 15:42:20 2018
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Subject: [Bug fortran/72709] Incorrect assignment of allocatable character array used as component of derived type
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--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
This fixed by the patch for PR70752, which I will be submitting tomorrow.
I am not sure that it is a duplicate even though it is fixed by the referred to
patch.
Paul
>From gcc-bugs-return-616141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 15:47:05 2018
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Subject: [Bug tree-optimization/87415] New: wrong code at -O1 and above on x86_64-linux-gnu
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It appears to be a recent regression.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180924 (experimental) [trunk revision 264537] (GCC)
$
$ gcctk -O0 small.c; ./a.out
$
$ gcctk -O1 small.c
$ ./a.out
Segmentation fault (core dumped)
$
--------------------------
struct A
{
int b:1;
};
int c[1], d;
int main ()
{
struct A e = { 0 };
if (!d)
e.b = -1;
if (!e.b)
c[1000] = 0;
return 0;
}
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Subject: [Bug c++/87399] Inconsistent determination of what is usable in a constant expression with __PRETTY_FUNCTION__
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87399
--- Comment #3 from eric-bugs at omnifarious dot org ---
*** Bug 87381 has been marked as a duplicate of this bug. ***
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Subject: [Bug target/86952] Avoid jump table for switch statement with -mindirect-branch=thunk
Date: Mon, 24 Sep 2018 15:50:00 -0000
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--- Comment #1 from Will Schmidt <willschm at gcc dot gnu.org> ---
Author: willschm
Date: Mon Sep 24 15:47:22 2018
New Revision: 264538
URL: https://gcc.gnu.org/viewcvs?rev=264538&root=gcc&view=rev
Log:
[testsuite]
2018-09-24 Will Schmidt <will_schmidt@vnet.ibm.com>
PR testsuite/86952
* gcc.target/powerpc/p8-vec-xl-xst-v2.c: Add and
update expected codegen
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/p8-vec-xl-xst-v2.c
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Subject: [Bug c++/87413] strlen accepted in array declaration
Date: Mon, 24 Sep 2018 16:05:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80265
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
As Jonathan already mentioned, treating __builtin_strlen("string") (among other
string function calls) as a constant integer expression is a useful extension
accepted by several C++ compilers, including Clang and ICC 18 (see also
pr80265).
G++ accepts the test case in C++ 11 mode and later, but rejects it with an
error in C++ 98 mode. Since C++ requires array bounds to be constant
expressions and calls to functions are not such expressions, it might be worth
issuing a pedantic warning on the strlen case in C++ 11 mode and later.
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Subject: [Bug c++/78986] [7/8/9 Regression] template inner classes are not affected by access specifiers
Date: Mon, 24 Sep 2018 16:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
CC| |msebor at gcc dot gnu.org
Summary|template inner classes are |[7/8/9 Regression] template
|not affected by visibility |inner classes are not
|specifiers |affected by access
| |specifiers
Ever confirmed|0 |1
Known to fail| |4.8.3, 4.9.3, 5.3.0, 7.2.0,
| |8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The test case in comment #0 has never been diagnosed by G++. The
following slightly modified test case, however, is rejected by G++ 5 but
accepted by 6 and later.
class B { struct T {}; };
class D: B { template<typename> struct U: T {}; };
D::U<int> d;
Bisection points to r231354 as the cause of the regression:
r231354 | jason | 2015-12-06 23:35:14 -0500 (Sun, 06 Dec 2015) | 4 lines
Fix parse/no-type-defn1.C with -std=c++1z.
* parser.c (struct tentative_firewall): New.
(cp_parser_template_id, cp_parser_decltype_expr): Use it.
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Subject: [Bug c++/87413] strlen accepted in array declaration
Date: Mon, 24 Sep 2018 16:19:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
Blocks| |83819
Ever confirmed|0 |1
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me confirm this for the missing pedantic warning.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
[Bug 83819] [meta-bug] missing strlen optimizations
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Subject: [Bug tree-optimization/87416] New: [8/9 Regression] switchconv: detect identity lookup arrays
Date: Mon, 24 Sep 2018 16:21:00 -0000
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Bug ID: 87416
Summary: [8/9 Regression] switchconv: detect identity lookup
arrays
Product: gcc
Version: 9.0
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Starting from gcc-8 the following function is no longer optimized to a simple
register copy:
int foo(int how)
{
switch (how) {
case 0: how = 0; break;
case 1: how = 1; break;
case 2: how = 2; break;
}
return how;
}
The reason is now switchconv pass manages to transform this to an array lookup
(nice!), but misses that the array is trivial. Previously switchconv didn't
touch the switch, and late gimple passes managed to simplify it.
I think it's not too costly to have a check in switchconv that helper array is
holding an identity map and emit a copy/conversion instead of array lookup.
Although the test looks artificial, such code appears in Python (and similar
code may appear elsewhere). In posixmodule.c it has:
/* Turn 0, 1, 2 into SEEK_{SET,CUR,END} */
switch (how) {
case 0: how = SEEK_SET; break;
case 1: how = SEEK_CUR; break;
case 2: how = SEEK_END; break;
}
and in fileio.c it has a more elaborate hand-optimized variant:
/* Turn 0, 1, 2 into SEEK_{SET,CUR,END} */
switch (whence) {
#if SEEK_SET != 0
case 0: whence = SEEK_SET; break;
#endif
#if SEEK_CUR != 1
case 1: whence = SEEK_CUR; break;
#endif
#if SEEK_END != 2
case 2: whence = SEEK_END; break;
#endif
}
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Subject: [Bug c++/87399] Inconsistent determination of what is usable in a constant expression with __PRETTY_FUNCTION__
Date: Mon, 24 Sep 2018 16:21:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I think this is essentially a duplicate of pr66639 requesting to treat
__PRETTY_FUNCTION__ as constexpr.
*** This bug has been marked as a duplicate of bug 66639 ***
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |barry.revzin at gmail dot com
--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 87399 has been marked as a duplicate of this bug. ***
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Subject: [Bug c/80868] "Duplicate const" warning emitted in `const typeof(foo) bar;`
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--- Comment #4 from Nick Desaulniers <ndesaulniers at google dot com> ---
We can close this bug. LLVM will match GCC here:
https://reviews.llvm.org/D52248
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Subject: [Bug bootstrap/87417] New: [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 16:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417
Bug ID: 87417
Summary: [9 regression] Internal error: abort in
attr_alt_intersection, at genattrtab.c:2357
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: iii at linux dot ibm.com
Target Milestone: ---
Host: i386-pc-solaris2.11, sparc-sun-solaris2.11
Target: i386-pc-solaris2.11, sparc-sun-solaris2.11
Build: i386-pc-solaris2.11, sparc-sun-solaris2.11
Between 20180922 (r264503) and 20180924 (r264537), both Solaris/SPARC and
Solaris/x86
bootstrap got broken (already in stage1):
genattrtab: Internal error: abort in attr_alt_intersection, at
genattrtab.c:2357
make[3]: *** [Makefile:2364: s-attrtab] Error 1
This is obviously due to
2018-09-24 Ilya Leoshkevich <iii@linux.ibm.com>
* genattrtab.c (mk_attr_alt): Use alternative_mask.
(attr_rtx_1): Adjust caching to match the new EQ_ATTR_ALT field
types.
(check_attr_test): Use alternative_mask.
(get_attr_value): Likewise.
(compute_alternative_mask): Use alternative_mask and XWINT.
(make_alternative_compare): Use alternative_mask.
(attr_alt_subset_p): Use XWINT.
(attr_alt_subset_of_compl_p): Likewise.
(attr_alt_intersection): Use alternative_mask and XWINT.
[...]
Thread 2 hit Breakpoint 1, fancy_abort (
file=0x80708fc "/vol/gcc/src/hg/trunk/local/gcc/genattrtab.c", line=2357,
func=0x8072444 <attr_alt_intersection(rtx_def*, rtx_def*)::__FUNCTION__>
"attr_alt_intersection") at /vol/gcc/src/hg/trunk/local/gcc/errors.c:133
133 internal_error ("abort in %s, at %s:%d", func, trim_filename (file),
line);
(gdb) where
#0 fancy_abort (
file=0x80708fc "/vol/gcc/src/hg/trunk/local/gcc/genattrtab.c", line=2357,
func=0x8072444 <attr_alt_intersection(rtx_def*, rtx_def*)::__FUNCTION__>
"attr_alt_intersection") at /vol/gcc/src/hg/trunk/local/gcc/errors.c:133
#1 0x0808442e in attr_alt_intersection (s1=0xa062950, s2=0x8deac68)
at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2357
#2 0x080847ed in simplify_test_exp (exp=0xa062968, insn_code=2757,
insn_index=3021) at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2447
#3 0x08083fe1 in simplify_test_exp_in_temp (exp=0xa062968, insn_code=2757,
insn_index=3021) at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2282
#4 0x080832b5 in insert_right_side (code=AND, exp=0xa062950, term=0x8deac68,
insn_code=2757, insn_index=3021)
at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:1863
#5 0x0808371a in evaluate_eq_attr (exp=0x8c87c00, attr=0x8c87d88,
value=0x8361260, insn_code=2757, insn_index=3021)
at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2015
#6 0x080855f7 in simplify_test_exp (exp=0x8c87c00, insn_code=2757,
insn_index=3021) at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2736
#7 0x08083fe1 in simplify_test_exp_in_temp (exp=0x8c87c00, insn_code=2757,
insn_index=3021) at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2282
#8 0x08082ce7 in simplify_cond (exp=0x81018a8, insn_code=2757,
insn_index=3021) at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:1680
#9 0x08085c41 in optimize_attrs (num_insn_codes=7443)
at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:2961
#10 0x0808b004 in main (argc=7, argv=0xfeffd964)
at /vol/gcc/src/hg/trunk/local/gcc/genattrtab.c:5271
(gdb) p s1
$3 = (rtx) 0xa062950
(gdb) pr
warning: Expression is not an assignment (and might have no effect)
(eq_attr_alt/s/i 28 [0x1c] 1 [0x1])
(gdb) p s2
$4 = (rtx) 0x8deac68
(gdb) pr
warning: Expression is not an assignment (and might have no effect)
(eq_attr_alt/s/i 128 [0x80] 1537 [0x601])
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 16:52:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 17:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87401
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Quite clear what is going on. The tree dump shows
assoc_intent_out ()
{
static void sub (real(kind=4) & restrict);
real(kind=4) r;
{
real(kind=4) * o;
o = &r;
o = {CLOBBER};
sub (o);
L.1:;
}
}
which is not the way to go :-)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87418] New: [9 Regression] Failure in coarray_lib_alloc_4.f90
Date: Mon, 24 Sep 2018 17:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87418
Bug ID: 87418
Summary: [9 Regression] Failure in coarray_lib_alloc_4.f90
Product: gcc
Version: unknown
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I'm seeing failures of the kind
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -O0 scan-tree-dump-times original
"_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -O1 scan-tree-dump-times original
"_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -O2 scan-tree-dump-times original
"_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions scan-tree-dump-times
original "_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -O3 -g scan-tree-dump-times
original "_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
FAIL: gfortran.dg/coarray_lib_alloc_4.f90 -Os scan-tree-dump-times original
"_gfortran_caf_is_present \\(xx\\.token, 2 - \\(integer\\(kind=4\\)\\)
xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)|_gfortran_caf_is_present
\\(xx\\.token, 2 - xx\\.dim\\[0\\]\\.lbound, &caf_ref\\.[0-9]+\\)" 10
This must be very recent, r264536 ?
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Subject: [Bug fortran/87397] Clobbering intent(out) variables caused regression in OpenCoarrays testsuite
Date: Mon, 24 Sep 2018 17:13:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Mon Sep 24 17:12:34 2018
New Revision: 264539
URL: https://gcc.gnu.org/viewcvs?rev=264539&root=gcc&view=rev
Log:
2018-09-24 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87397
* gfc_conv_procedure_call: Do not add clobber on INTENT(OUT)
for variables in an associate statement.
2018-09-24 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87401
* gfortran.dg/intent_out_12.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_12.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87418] [9 Regression] Failure in coarray_lib_alloc_4.f90
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |cesar at gcc dot gnu.org
Target Milestone|--- |9.0
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87401
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Mon Sep 24 17:12:34 2018
New Revision: 264539
URL: https://gcc.gnu.org/viewcvs?rev=264539&root=gcc&view=rev
Log:
2018-09-24 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87397
* gfc_conv_procedure_call: Do not add clobber on INTENT(OUT)
for variables in an associate statement.
2018-09-24 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87401
* gfortran.dg/intent_out_12.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_12.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Mon, 24 Sep 2018 17:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87401
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed, closing.
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Subject: [Bug target/87419] New: -mfentry generates assembly codes as string instead of RTL
Date: Mon, 24 Sep 2018 17:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87419
Bug ID: 87419
Summary: -mfentry generates assembly codes as string instead of
RTL
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: wei3.xiao at intel dot com, xuepeng.guo at intel dot com
Target Milestone: ---
Target: i386,x86-64
FUNCTION_PROFILER, aka x86_function_profiler, used by -mfentry,
generates assembly codes as strings. It is better for -mfentry
to generate RTLs instead.
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Subject: [Bug target/82699] ENDBR isn't generated at function entrance (with -mfentry)
Date: Mon, 24 Sep 2018 17:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82699
--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Sep 24 17:20:58 2018
New Revision: 264540
URL: https://gcc.gnu.org/viewcvs?rev=264540&root=gcc&view=rev
Log:
i386: Insert ENDBR before the profiling counter call
ENDBR must be the first instruction of a function. This patch queues
ENDBR if we need to put the profiling counter call before the prologue
and generate ENDBR before the profiling counter call.
gcc/
PR target/82699
* config/i386/i386.c (rest_of_insert_endbranch): Set
endbr_queued_at_entrance to true and don't insert ENDBR if
x86_function_profiler will be called.
(x86_function_profiler): Insert ENDBR if endbr_queued_at_entrance
is true.
* config/i386/i386.h (machine_function): Add
endbr_queued_at_entrance.
gcc/testsuite/
PR target/82699
* gcc.target/i386/pr82699-1.c: New file.
* gcc.target/i386/pr82699-2.c: Likewise.
* gcc.target/i386/pr82699-3.c: Likewise.
* gcc.target/i386/pr82699-4.c: Likewise.
* gcc.target/i386/pr82699-5.c: Likewise.
* gcc.target/i386/pr82699-6.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82699-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-2.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-3.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-4.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-5.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-6.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87418] [9 Regression] Failure in coarray_lib_alloc_4.f90
Date: Mon, 24 Sep 2018 17:43:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Uh, I just saw that this was out of sync.
Sorry for the noise.
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Subject: [Bug c++/85070] [8/9 Regression] ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409
Date: Mon, 24 Sep 2018 17:44:00 -0000
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--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Mon Sep 24 17:42:45 2018
New Revision: 264541
URL: https://gcc.gnu.org/viewcvs?rev=264541&root=gcc&view=rev
Log:
/cp
2018-09-24 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85070
* method.c (lazily_declare_fn): During error-recovery add_method
may return false.
/testsuite
2018-09-24 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85070
* g++.dg/cpp0x/pr85070.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr85070.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/method.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/85070] [8/9 Regression] ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409
Date: Mon, 24 Sep 2018 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85070
--- Comment #7 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Mon Sep 24 17:44:02 2018
New Revision: 264542
URL: https://gcc.gnu.org/viewcvs?rev=264542&root=gcc&view=rev
Log:
/cp
2018-09-24 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85070
* method.c (lazily_declare_fn): During error-recovery add_method
may return false.
/testsuite
2018-09-24 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/85070
* g++.dg/cpp0x/pr85070.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/pr85070.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/method.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85070] [8/9 Regression] ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409
Date: Mon, 24 Sep 2018 17:59:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Assignee|nathan at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed for 8.3.
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Subject: [Bug target/87414] -mindirect-branch=thunk produces thunk with incorrect CFI on x86_64
Date: Mon, 24 Sep 2018 18:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87414
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think we want to emit .cfi_def_cfa_offset 16 after .LIND1: label, because the
call acts as a pushm so the caller (of the thunk) is no longer at $sp+8 after
the call, but at $sp+16.
>From gcc-bugs-return-616165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:06:24 2018
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Subject: [Bug tree-optimization/87420] New: missing warning for strcpy of an unterminated array with variable offset
Date: Mon, 24 Sep 2018 18:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87420
Bug ID: 87420
Summary: missing warning for strcpy of an unterminated array
with variable offset
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When the source array involves a variable index/offset, GCC 9 issues a warning
for a strcpy call with a single-dimensional unterminated array but fails to
issue the same warning when the array has multiple dimensions, as shown in the
test case below:
$ cat c.c && gcc -O2 -S -Wall -Wextra -Wpedantic c.c
const char a[] = { '1', '2', '3' };
const char b[][3] = { { '1', '2' }, { '1', '2', '3' } };
void f (char *d, int i)
{
__builtin_strcpy (d, &a[i]); // warning (good)
}
void g (char *d, int i)
{
__builtin_strcpy (d, &b[1][i]); // missing warning
}
c.c: In function ‘f’:
c.c:6:3: warning: ‘strcpy’ argument missing terminating nul
[-Wstringop-overflow=]
6 | __builtin_strcpy (d, &a[i]); // warning (good)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
c.c:1:12: note: referenced argument declared here
1 | const char a[] = { '1', '2', '3' };
| ^
>From gcc-bugs-return-616166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:08:30 2018
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Mon, 24 Sep 2018 18:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #36 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The test succeeds with r264348+patch of r264485, but not with r264349+patch.
I make a mistake in my bissection: r264349+patch is OK as well as
r264357+patch, but not r264358+patch.
>From gcc-bugs-return-616168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:47:33 2018
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Subject: [Bug target/87421] GCC generates unaligned movdqa
Date: Mon, 24 Sep 2018 18:47:00 -0000
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--- Comment #1 from Yuxuan Shui <yshuiv7 at gmail dot com> ---
FYI, clang/llvm correctly generates movups instruction for the read.
>From gcc-bugs-return-616167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:46:37 2018
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Subject: [Bug target/87421] New: GCC generates unaligned movdqa
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87421
Bug ID: 87421
Summary: GCC generates unaligned movdqa
Product: gcc
Version: 8.2.0
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C++ Test case:
struct A {
unsigned int a1;
long a5;
unsigned int a6;
};
int fun(A *res);
int fun2(A *desc)
{
A resource;
fun(&resource);
*desc = resource;
return 0;
}
Target: amd64
Compiler flags:
g++ test.cc -c -O2 -fno-omit-frame-pointer -std=gnu++11
Compiles to:
0000000000000000 <_Z4fun2P1A>:
// Assuming 16 bytes stack alignment
0: 55 push %rbp // rsp now aligns to
16 bytes + 8 bytes
1: 48 89 e5 mov %rsp,%rbp // rbp also aligns to
16 + 8
4: 53 push %rbx
5: 48 89 fb mov %rdi,%rbx
8: 48 8d 7d d0 lea -0x30(%rbp),%rdi
c: 48 83 ec 28 sub $0x28,%rsp
10: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax
17: 00 00
19: 48 89 45 e8 mov %rax,-0x18(%rbp)
1d: 31 c0 xor %eax,%eax
1f: e8 00 00 00 00 callq 24 <_Z4fun2P1A+0x24>
24: 48 8b 45 e0 mov -0x20(%rbp),%rax
28: 66 0f 6f 45 d0 movdqa -0x30(%rbp),%xmm0 // rbp-0x30 is not
aligned to 16 bytes
2d: 48 89 43 10 mov %rax,0x10(%rbx)
31: 0f 11 03 movups %xmm0,(%rbx)
34: 48 8b 55 e8 mov -0x18(%rbp),%rdx
38: 64 48 33 14 25 28 00 xor %fs:0x28,%rdx
3f: 00 00
41: 75 09 jne 4c <_Z4fun2P1A+0x4c>
43: 48 83 c4 28 add $0x28,%rsp
47: 31 c0 xor %eax,%eax
49: 5b pop %rbx
4a: 5d pop %rbp
4b: c3 retq
4c: e8 00 00 00 00 callq 51 <_Z4fun2P1A+0x51>
>From gcc-bugs-return-616169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:47:42 2018
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Subject: [Bug c/87347] ICE in warn_for_abs at gcc/c/c-parser.c:9226 since r264368
Date: Mon, 24 Sep 2018 18:49:00 -0000
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--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
So I did not manage to do so last week but I have submitted it today:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01373.html
>From gcc-bugs-return-616170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 18:49:24 2018
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Mon, 24 Sep 2018 19:17:00 -0000
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--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Well, I did not quite manage on Friday, but I have submitted the patch now:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01374.html
>From gcc-bugs-return-616171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:17:05 2018
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Subject: [Bug target/87421] GCC generates unaligned movdqa
Date: Mon, 24 Sep 2018 19:31:00 -0000
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Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fw at gcc dot gnu.org
--- Comment #2 from Florian Weimer <fw at gcc dot gnu.org> ---
What's your exact target?
On x86-64-pc-linux-gnu, on function entry, %rsp + 8 is a multiple of 16, so
%rbp is a multiple of 16 throughout the function. This means that %rbp - 48 is
a multiple of 16 as well, and the movdqa load is 16-byte-aligned.
>From gcc-bugs-return-616173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:32:08 2018
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Subject: [Bug tree-optimization/87423] New: missing warning for strcpy of an unterminated member array
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87423
Bug ID: 87423
Summary: missing warning for strcpy of an unterminated member
array
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
GCC 9 issues a warning for a strcpy call with an unterminated constant array
but fails to issue the same warning when the array is a member of a const
object as shown in the test case below. (The duplicate warning in the subject
of bug 87422).
$ cat c.c && gcc -O2 -S -Wall -Wextra -Wpedantic c.c
const char a[3] = { '1', '2', '3' };
const struct { char a[3]; } x = { { '1', '2', '3' } };
int f (void)
{
return __builtin_strlen (a); // warning (good)
}
int g (void)
{
return __builtin_strlen (x.a); // missing warning
}
c.c: In function ‘f’:
c.c:7:29: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
7 | return __builtin_strlen (a); // warning (good)
| ^
c.c:1:12: note: referenced argument declared here
1 | const char a[3] = { '1', '2', '3' };
| ^
c.c:7:29: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
7 | return __builtin_strlen (a); // warning (good)
| ^
c.c:1:12: note: referenced argument declared here
1 | const char a[3] = { '1', '2', '3' };
| ^
>From gcc-bugs-return-616172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:31:21 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87422] New: duplicate warning for strcpy of an unterminated character array
Date: Mon, 24 Sep 2018 19:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87422
Bug ID: 87422
Summary: duplicate warning for strcpy of an unterminated
character array
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
GCC issues two instances of the same warning for the following simple test
case:
$ cat c.c && gcc -O2 -S -Wall -Wextra -Wpedantic
-fdump-tree-optimized=/dev/stdout c.c
const char a[3] = { '1', '2', '3' };
int f (void)
{
return __builtin_strlen (a); // duplicate warning
}
c.c: In function ‘f’:
c.c:5:29: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
5 | return __builtin_strlen (a); // duplicate warning
| ^
c.c:1:12: note: referenced argument declared here
1 | const char a[3] = { '1', '2', '3' };
| ^
c.c:5:29: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
5 | return __builtin_strlen (a); // duplicate warning
| ^
c.c:1:12: note: referenced argument declared here
1 | const char a[3] = { '1', '2', '3' };
| ^
>From gcc-bugs-return-616174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:32:38 2018
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Subject: [Bug c++/87407] Enhance -Wunused-function to handle also inline functions
Date: Mon, 24 Sep 2018 19:34:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #12 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> I agree that we can warn for static inline declarations with locations that
> are not in any included file (not sure how exactly to verify that).
MAIN_FILE_P() ?
>From gcc-bugs-return-616175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:34:20 2018
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Subject: [Bug target/87421] GCC generates unaligned movdqa
Date: Mon, 24 Sep 2018 19:41:00 -0000
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Yuxuan Shui <yshuiv7 at gmail dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Yuxuan Shui <yshuiv7 at gmail dot com> ---
Sorry, you are totally right. I misunderstood the ABI definition.
>From gcc-bugs-return-616176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:41:19 2018
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Mon, 24 Sep 2018 19:43:00 -0000
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--- Comment #29 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> gnatlink is _never_ a shell script though but, yes, it's apparently the
> usual mess with Unix paths on Windows.
It seems that some paths are properly translated though, for example the
library paths. Do you know why? It would be nice to have the gnatlink command
line that gave rise to the invocation quoted in the dump screen.
>From gcc-bugs-return-616177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:43:26 2018
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87406] Implement -Wconstant-conversion and -Wbitfield-constant-conversion
Date: Mon, 24 Sep 2018 19:53:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> We do warn about this, but only with -Wconversion which is not in -Wall or
> -Wextra
>
> c.cc:1:24: warning: conversion to ‘char’ from ‘int’ may alter its value
> [-Wconversion]
> char f(int i) { return i; }
This is not the "constant" case. A testcase would be:
char foo(void) {
return 132;
}
<source>: In function 'char square()':
<source>:3:12: warning: conversion from 'int' to 'char' changes value from
'132' to ''\37777777604'' [-Wconversion]
return 132;
^~~
I think the constant case should be safe for -Wall. It is a just a matter of
adding more specific flags.
>From gcc-bugs-return-616178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 19:53:25 2018
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Subject: [Bug tree-optimization/87422] duplicate warning for strcpy of an unterminated character array
Date: Mon, 24 Sep 2018 20:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Jeff, this seems to have crept in during the integration of my original patch
(it issues just a single instance of the warning).
>From gcc-bugs-return-616179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:04:51 2018
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 20:07:00 -0000
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--- Comment #1 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Ouch! Somehow s2 got corrupted (the 2nd value can be either 0 or 1). I'm
looking at this now.
>From gcc-bugs-return-616181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:17:26 2018
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Subject: [Bug target/87414] -mindirect-branch=thunk produces thunk with incorrect CFI on x86_64
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-24
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44744
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44744&action=edit
gcc9-pr87414.patch
Untested fix.
>From gcc-bugs-return-616180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:07:14 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87424] New: inlining context absent from missing nul warnings
Date: Mon, 24 Sep 2018 20:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87424
Bug ID: 87424
Summary: inlining context absent from missing nul warnings
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The "missing terminating nul" warning newly issued by GCC 9 is missing inlining
context, making it difficult to determine which strlen call is the cause of the
problem.
$ cat d.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout d.c
static inline int f (const char *s)
{
return __builtin_strlen (s); // absent from diagnostic output
}
const char a[3] = { '1', '2', '3' };
int g (void)
{
return f (a);
}
d.c: In function ‘g’:
d.c:10:13: warning: ‘strlen’ argument missing terminating nul
[-Wstringop-overflow=]
10 | return f (a);
| ^
d.c:6:12: note: referenced argument declared here
6 | const char a[3] = { '1', '2', '3' };
| ^
;; Function g (g, funcdef_no=1, decl_uid=1910, cgraph_uid=2, symbol_order=2)
g ()
{
long unsigned int _2;
int _3;
<bb 2> [local count: 1073741824]:
_2 = __builtin_strlen (&a);
_3 = (int) _2;
return _3;
}
>From gcc-bugs-return-616182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:17:46 2018
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From: "iii at linux dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 20:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417
--- Comment #2 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Fails on i686-linux-gnu:
*** Error in `build/genattrtab': malloc(): memory corruption: 0x08e56da0 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x6738a)[0xf755c38a]
/lib/i386-linux-gnu/libc.so.6(+0x6dfc7)[0xf7562fc7]
/lib/i386-linux-gnu/libc.so.6(+0x6ff82)[0xf7564f82]
/lib/i386-linux-gnu/libc.so.6(__libc_malloc+0xc5)[0xf7566bf5]
build/genattrtab[0x8064fd4]
build/genattrtab[0x805233f]
build/genattrtab[0x805236e]
build/genattrtab[0x804cc3a]
build/genattrtab[0x804ea6e]
build/genattrtab[0x804ebc0]
build/genattrtab[0x804a0ab]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf6)[0xf750d286]
build/genattrtab[0x804ba27]
======= Memory map: ========
08048000-08091000 r-xp 00000000 00:21 29450225
/Users/beep/ibm/gcc/host-x86_64-pc-linux-gnu/gcc/build/genattrtab
08092000-08093000 r--p 00049000 00:21 29450225
/Users/beep/ibm/gcc/host-x86_64-pc-linux-gnu/gcc/build/genattrtab
08093000-08097000 rw-p 0004a000 00:21 29450225
/Users/beep/ibm/gcc/host-x86_64-pc-linux-gnu/gcc/build/genattrtab
08097000-0809b000 rw-p 00000000 00:00 0
08452000-08eef000 rw-p 00000000 00:00 0 [heap]
f7100000-f7121000 rw-p 00000000 00:00 0
f7121000-f7200000 ---p 00000000 00:00 0
f72af000-f73b1000 rw-p 00000000 00:00 0
f73ce000-f73ea000 r-xp 00000000 00:2b 74
/lib/i386-linux-gnu/libgcc_s.so.1
f73ea000-f73eb000 r--p 0001b000 00:2b 74
/lib/i386-linux-gnu/libgcc_s.so.1
f73eb000-f73ec000 rw-p 0001c000 00:2b 74
/lib/i386-linux-gnu/libgcc_s.so.1
f73f1000-f74f5000 rw-p 00000000 00:00 0
f74f5000-f76a6000 r-xp 00000000 00:2b 43
/lib/i386-linux-gnu/libc-2.24.so
f76a6000-f76a8000 r--p 001b0000 00:2b 43
/lib/i386-linux-gnu/libc-2.24.so
f76a8000-f76a9000 rw-p 001b2000 00:2b 43
/lib/i386-linux-gnu/libc-2.24.so
f76a9000-f76ac000 rw-p 00000000 00:00 0
f76ac000-f76ff000 r-xp 00000000 00:2b 88
/lib/i386-linux-gnu/libm-2.24.so
f76ff000-f7700000 r--p 00052000 00:2b 88
/lib/i386-linux-gnu/libm-2.24.so
f7700000-f7701000 rw-p 00053000 00:2b 88
/lib/i386-linux-gnu/libm-2.24.so
f7705000-f7709000 rw-p 00000000 00:00 0
f7709000-f770b000 r--p 00000000 00:00 0 [vvar]
f770b000-f770c000 r-xp 00000000 00:00 0 [vdso]
f770c000-f772f000 r-xp 00000000 00:2b 36
/lib/i386-linux-gnu/ld-2.24.so
f772f000-f7730000 r--p 00022000 00:2b 36
/lib/i386-linux-gnu/ld-2.24.so
f7730000-f7731000 rw-p 00023000 00:2b 36
/lib/i386-linux-gnu/ld-2.24.so
fffc5000-fffe7000 rw-p 00000000 00:00 0
[stack]
>From gcc-bugs-return-616183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:25:31 2018
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87425] New: [9 Regression] ICE with virtual assignment operator
Date: Mon, 24 Sep 2018 20:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87425
Bug ID: 87425
Summary: [9 Regression] ICE with virtual assignment operator
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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CC: jakub at gcc dot gnu.org, mpolacek at gcc dot gnu.org
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The following valid code snippet (compiled with "-std=c++2a") triggers an ICE
on trunk:
=================================
struct A
{
virtual A& operator= (int);
};
struct B
{
A a;
B() { a = 0; }
};
=================================
bug.cc: In constructor 'B::B()':
bug.cc:9:14: internal compiler error: Segmentation fault
9 | B() { a = 0; }
| ^
0xed7eef crash_signal
../../gcc/gcc/toplev.c:325
0x8760fc tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3112
0x8760fc cxx_eval_constant_expression
../../gcc/gcc/cp/constexpr.c:4821
0x8791be cxx_eval_outermost_constant_expr
../../gcc/gcc/cp/constexpr.c:5018
0x87c6fc maybe_constant_init_1
../../gcc/gcc/cp/constexpr.c:5366
0x8914f0 cp_get_fndecl_from_callee(tree_node*, bool)
../../gcc/gcc/cp/cvt.c:967
0x8915fb maybe_warn_nodiscard
../../gcc/gcc/cp/cvt.c:1016
0x891ea7 convert_to_void(tree_node*, impl_conv_void, int)
../../gcc/gcc/cp/cvt.c:1398
0x9c15a0 finish_expr_stmt(tree_node*)
../../gcc/gcc/cp/semantics.c:686
0x93e977 cp_parser_statement
../../gcc/gcc/cp/parser.c:10963
0x93fe98 cp_parser_statement_seq_opt
../../gcc/gcc/cp/parser.c:11302
0x93ff7f cp_parser_compound_statement
../../gcc/gcc/cp/parser.c:11256
0x956100 cp_parser_function_body
../../gcc/gcc/cp/parser.c:21930
0x956100 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/gcc/cp/parser.c:21967
0x956970 cp_parser_function_definition_after_declarator
../../gcc/gcc/cp/parser.c:26982
0x9585ec cp_parser_late_parsing_for_member
../../gcc/gcc/cp/parser.c:27862
0x94b1ff cp_parser_class_specifier_1
../../gcc/gcc/cp/parser.c:22906
0x94c1eb cp_parser_class_specifier
../../gcc/gcc/cp/parser.c:22932
0x94c1eb cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:16920
0x958d19 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:13757
Please submit a full bug report, [etc.]
This seems to be related to PR87398.
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From: "SztfG at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87426] New: c_parser_unary_expression ICE
Date: Mon, 24 Sep 2018 20:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87426
Bug ID: 87426
Summary: c_parser_unary_expression ICE
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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testcase:
#include <stdio.h>
#include <inttypes.h>
//#include <stdlib.h>
static const uint32_t pow2[511] ={ 0 }; // doesnt matter
#define SQR(x) pow2[x]
uint16_t mul8b(uint8_t a, uint8_t b)
{
return (SQR((uint16_t)a+(uint16_t)b) - SQR(abs((int16_t)a-(int16_t)b))) >>
2;;
}
prog.c: In function 'mul8b':
prog.c:12:46: warning: implicit declaration of function 'abs'
[-Wimplicit-function-declaration]
12 | return (SQR((uint16_t)a+(uint16_t)b) - SQR(abs((int16_t)a-(int16_t)b)))
>> 2;;
| ^~~
prog.c:8:21: note: in definition of macro 'SQR'
8 | #define SQR(x) pow2[x]
| ^
prog.c:12:3: internal compiler error: Segmentation fault
12 | return (SQR((uint16_t)a+(uint16_t)b) - SQR(abs((int16_t)a-(int16_t)b)))
>> 2;;
| ^~~~~~
0xa31cbf crash_signal
../../source/gcc/toplev.c:325
0x5f8606 warn_for_abs
../../source/gcc/c/c-parser.c:9226
0x5f8606 c_parser_postfix_expression_after_primary
../../source/gcc/c/c-parser.c:9318
0x5ea523 c_parser_postfix_expression
../../source/gcc/c/c-parser.c:9006
0x5f2f27 c_parser_unary_expression
../../source/gcc/c/c-parser.c:7266
0x5f416f c_parser_cast_expression
../../source/gcc/c/c-parser.c:7110
0x5f43e6 c_parser_binary_expression
../../source/gcc/c/c-parser.c:6913
0x5f52f5 c_parser_conditional_expression
../../source/gcc/c/c-parser.c:6647
0x5f5830 c_parser_expr_no_commas
../../source/gcc/c/c-parser.c:6564
0x5f5a82 c_parser_expression
../../source/gcc/c/c-parser.c:9460
0x5f7fb7 c_parser_postfix_expression_after_primary
../../source/gcc/c/c-parser.c:9272
0x5ea523 c_parser_postfix_expression
../../source/gcc/c/c-parser.c:9006
0x5f2f27 c_parser_unary_expression
../../source/gcc/c/c-parser.c:7266
0x5f416f c_parser_cast_expression
../../source/gcc/c/c-parser.c:7110
0x5f4580 c_parser_binary_expression
../../source/gcc/c/c-parser.c:7036
0x5f52f5 c_parser_conditional_expression
../../source/gcc/c/c-parser.c:6647
0x5f5830 c_parser_expr_no_commas
../../source/gcc/c/c-parser.c:6564
0x5f5a82 c_parser_expression
../../source/gcc/c/c-parser.c:9460
0x5ea67b c_parser_postfix_expression
../../source/gcc/c/c-parser.c:7968
0x5f2f27 c_parser_unary_expression
../../source/gcc/c/c-parser.c:7266
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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From: "iii at linux dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 20:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417
--- Comment #3 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Valgrind has found an issue:
==12738== Invalid write of size 4
==12738== at 0x804CC48: attr_rtx_1 (genattrtab.c:518)
==12738== by 0x804CC48: attr_rtx(rtx_code, ...) (genattrtab.c:588)
==12738== by 0x804EA6D: mk_attr_alt (genattrtab.c:2406)
==12738== by 0x804EA6D: check_attr_test(file_location, rtx_def*, attr_desc*)
(genattrtab.c:709)
==12738== by 0x804EBBF: check_attr_value(file_location, rtx_def*,
attr_desc*) (genattrtab.c:945)
==12738== by 0x804A0AA: check_defs (genattrtab.c:1108)
==12738== by 0x804A0AA: main (genattrtab.c:5253)
==12738== Address 0x6d79aa0 is 0 bytes after a block of size 16 alloc'd
==12738== at 0x402E27C: malloc (vg_replace_malloc.c:299)
==12738== by 0x8064FD3: xmalloc (xmalloc.c:147)
==12738== by 0x805233E: ggc_internal_alloc (ggc.h:130)
==12738== by 0x805233E: ggc_alloc_rtx_def_stat (ggc.h:275)
==12738== by 0x805233E: rtx_alloc_stat_v(rtx_code, int) (rtl.c:209)
==12738== by 0x805236D: rtx_alloc(rtx_code) (rtl.c:233)
==12738== by 0x804CC39: attr_rtx_1 (genattrtab.c:516)
==12738== by 0x804CC39: attr_rtx(rtx_code, ...) (genattrtab.c:588)
==12738== by 0x804EA6D: mk_attr_alt (genattrtab.c:2406)
==12738== by 0x804EA6D: check_attr_test(file_location, rtx_def*, attr_desc*)
(genattrtab.c:709)
==12738== by 0x804EBBF: check_attr_value(file_location, rtx_def*,
attr_desc*) (genattrtab.c:945)
==12738== by 0x804A0AA: check_defs (genattrtab.c:1108)
==12738== by 0x804A0AA: main (genattrtab.c:5253)
Apparently allocated EQ_ATTR_ALT is smaller than I expect: 16 bytes are clearly
not enough to contain rtx_def and 2 HOST_WIDE_INTs.
>From gcc-bugs-return-616186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 20:44:28 2018
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From: "SztfG at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87426] c_parser_unary_expression ICE
Date: Mon, 24 Sep 2018 21:00:00 -0000
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--- Comment #1 from SztfG at yandex dot ru ---
reduced testcase
int arr[1] ={ 0 };
int test(int a)
{
return (arr[abs(a)]);
}
>From gcc-bugs-return-616187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 21:00:38 2018
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Subject: [Bug c/80868] "Duplicate const" warning emitted in `const typeof(foo) bar;`
Date: Mon, 24 Sep 2018 21:04:00 -0000
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--- Comment #5 from Nick Desaulniers <ndesaulniers at google dot com> ---
Oh, note in the typedef case:
typedef const int t;
const t x;
It seems that for -std=c89 (non pedantic, non GNU), GCC does not warn. That
seems to violate C90 6.5.3 constraints: "The same type qualifier shall not
appear more than once in the same specifier-list or qualifier-list, either
directly or via one or more typedefs."
>From gcc-bugs-return-616188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 21:04:21 2018
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Mon, 24 Sep 2018 21:38:00 -0000
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--- Comment #5 from Eugeniu Rosca <roscaeugeniu at gmail dot com> ---
Hi Andrew,
Thanks for the much more satisfying answer.
> In C90, it was implemented defined behavior (while in C99 and above it is undefined behavior).
I trust you, but why not giving a reference to the source? Based on my reading
of the C89 draft, it should be based on Chapter "A.6.3 Implementation-defined
behavior", more specifically subchapter "A.6.3.4 Integers" saying:
* The results of bitwise operations on signed integers (3.3).
> See the thread which added undefined santizer:
> https://gcc.gnu.org/ml/gcc-patches/2013-06/msg00275.html
That turned to be a useful reference. +1.
> YES there is a huge difference between the languages
It's helpful to see you putting such an emphasis on the difference between the
standards.
> which cannot be changed now as that would be requiring to change C90.
IMHO a valid scenario would also be not touching C89/C90, but correcting C11 so
that "left-shifting into the sign bit" becomes defined or
implementation-defined. To my knowledge, such kind of step actually exists in
the form of DR463 entry in the "Defect Report Summary for C11" (see
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2148.htm#dr_463 ), which tried
"Harmonizing left-shift with C++14". The latter considers "left-shifting into
the sign bit" as defined behavior.
>> ANSI C
> ANSI C is ISO C. ANSI is a member of ISO. I think you meant to write ANSI C89 there :).
By "ANSI C" I mean C89/C90 and so do references [14-16], so it's quite
surprising we are not on the same page.
Before I consider this topic closed, I kindly ask you to provide below feedback
which I will share with U-Boot people:
- Since U-Boot is compiled using '-std=gnu11' and since UBSAN reports (1 << 31)
as undefined behavior and since C11 standard says that encountering an UB the
compiler may "ignore the situation completely with unpredictable results", what
are there real-life issues expected from shifting signed integers into (*not
past*) the sign bit? What to expect in the worst case?
- Is it possible to provide a sample code which would showcase that
"left-shifting into the sign bit" can lead to program behavior being erroneous,
unexpected or dependent on the gcc optimization level? For example, we know
[17] that "(a + 1 > a)" can lead to surprising results depending on whether the
program is compiled with "-fwrapv" or not. Are there any similar examples
involving '<<' ? This would be of extreme help for U-Boot community.
- What would be your personal choice between '-std=gnu89' (still used by Linux
kernel) and '-std=gnu11' (used in U-Boot/coreboot), given your GCC experience
gathered so far?
Thank you in advance.
Best regards,
Eugeniu.
[14] https://en.wikipedia.org/wiki/ANSI_C
This (C89) version of the language is often referred to as "ANSI C"
[15] https://stackoverflow.com/a/3783805/2381750
In common parlance, the phrase "ANSI C" usually refers to C89.
[16]
https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/C-Dialect-Options.html#C-Dialect-Options
In C mode, this (-ansi) is equivalent to -std=c90.
[17] http://thiemonagel.de/2010/01/signed-integer-overflow/
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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CC| |rsandifo at gcc dot gnu.org
--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Ilya Leoshkevich from comment #3)
> Apparently allocated EQ_ATTR_ALT is smaller than I expect: 16 bytes are
> clearly not enough to contain rtx_def and 2 HOST_WIDE_INTs.
Yeah, the rtx_code_size[] definition in rtl.c needs to handle
EQ_ATTR_ALT. Sorry for missing that in the review.
Originally that test only handled two codes. Now that there
are five it needs to handle, it might more sense to use:
FORMAT[0] == 'w'
instead of specific code checks, since there's a requirement
that either all fields must be 'w' or none can be.
>From gcc-bugs-return-616190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 24 21:43:18 2018
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 21:51:00 -0000
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--- Comment #5 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Ok, makes sense. I've just made a patch that adds the 5th, but it had to be
special-cased for GENERATOR_FILE, and thus doesn't look too nice. FORMAT[0] ==
'w' looks much cleaner.
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 22:13:00 -0000
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--- Comment #6 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Candidate patch here:
https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01382.html
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Mon, 24 Sep 2018 22:35:00 -0000
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Gerald Pfeifer <gerald at pfeifer dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|i386-pc-solaris2.11, |i386-pc-solaris2.11,
|sparc-sun-solaris2.11 |sparc-sun-solaris2.11,
| |i386-unknown-freebsd10.4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-24
CC| |gerald at pfeifer dot com
Host|i386-pc-solaris2.11, |i386-pc-solaris2.11,
|sparc-sun-solaris2.11 |sparc-sun-solaris2.11,
| |i386-unknown-freebsd10.4
Ever confirmed|0 |1
Build|i386-pc-solaris2.11, |i386-pc-solaris2.11,
|sparc-sun-solaris2.11 |sparc-sun-solaris2.11,
| |i386-unknown-freebsd10.4
--- Comment #7 from Gerald Pfeifer <gerald at pfeifer dot com> ---
Same for i386-unknown-freebsd10.4.
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Subject: [Bug target/87330] ICE in scan_rtx_reg, at regrename.c:1097
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--- Comment #4 from sameerad at gcc dot gnu.org ---
I am having a look at this issue.
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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87427] New: -Wclass-memaccess improvement for POD with convenience initializer
Date: Mon, 24 Sep 2018 23:22:00 -0000
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Bug ID: 87427
Summary: -Wclass-memaccess improvement for POD with convenience
initializer
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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#include <cstring>
struct S { int z; S() { z = 1; } } s;
int main() { memset(&s, 0, sizeof(s)); }
The rationale of -Wclass-memaccess as presented in the manpage ("Modifying the
representation of such objects may violate invariants maintained by member
functions") is sound.
For the 3-liner example though, it could be argued that member functions do not
guarantee any invariant, given all member variables are public and kinda invite
direct access.
Would it be considered worthwhile to have a, say,
-Wclass-memaccess=except-struct, to relax the warning for types that satisfy
(standard_layout && (all members are public) && (all members are non-const))?
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From: "mrs at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Mon, 24 Sep 2018 23:33:00 -0000
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mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mrs at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=15428
--- Comment #10 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
I've related 15428 which has some details for why this is the way it is.
Unless the underlying bug has been fixed in the linker, changing this will
merely re-introduce the previous bug that was fixed. If we do that, we need to
weigh which feature we want to work and which to break. The previous answer,
was to make static linking work.
See 2004-06-03 Matt Austern <austern@apple.com> and 2004-03-12 Matt Austern
<austern@apple.com> for the totality of the code.
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Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
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Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu.org
--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
One can specify an architecture with FP registers, and an ABI that does not use
the FP registers. By the same token, it is reasonable to expect that one
should be able to specify an rv32i architecture and use an rv32e ABI with it.
In both cases, the unused registers all become call clobbered (aka caller
saved).
If we go with this interpretation, then the issue here is that we have some
architecture checks for TARGET_RVE that should instead be ABI checks for
riscv_abi == ABI_ILP32E.
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
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--- Comment #11 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to mrs@gcc.gnu.org from comment #10)
> I've related 15428 which has some details for why this is the way it is.
>
> Unless the underlying bug has been fixed in the linker, changing this will
> merely re-introduce the previous bug that was fixed. If we do that, we need
> to weigh which feature we want to work and which to break. The previous
> answer, was to make static linking work.
>
> See 2004-06-03 Matt Austern <austern@apple.com> and 2004-03-12 Matt
> Austern <austern@apple.com> for the totality of the code.
Yup .. I've been looking at that.
We already have the linker version, so should be able to make an intelligent
choice.
However, as I read the original bug (against powerpc-darwin7), it might
actually be ar that's the problem - since it's the presence of weak extern
symbols in the archive TOC that's the issue. If that's the case, I'm sure we
can run a config. test to see if ar meets the criteria.
Anyway, trying to work my way back to a cut-off point (I don't have an easy way
to test if powerpc-darwin7 will actually bootstrap any recent GCC - but suspect
that it will not without an updated as/ld at minimum).
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Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
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Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
Assignee|unassigned at gcc dot gnu.org |wilson at gcc dot gnu.org
Ever confirmed|0 |1
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Subject: [Bug target/87358] [8/9 Regression] ICE when -mtune=thunderx2t99 applied
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.3.0 |8.2.0
Resolution|MOVED |FIXED
Target Milestone|--- |8.3
Summary|ICE when |[8/9 Regression] ICE when
|-mtune=thunderx2t99 applied |-mtune=thunderx2t99 applied
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So there was two crashes, one which was due to Linaro not backporting the fix
and the other part was another crash which was just a bug.
I Fixed that bug:
https://gcc.gnu.org/ml/gcc-cvs/2018-09/msg00525.html
https://gcc.gnu.org/ml/gcc-cvs/2018-09/msg00530.html
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From: "mrs at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 00:31:00 -0000
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--- Comment #12 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
I changed the test case around, and the linker seems to be able to resolve from
a .a now:
$ ar -q liblib.a lib.o
$ nm -m liblib.a
liblib.a(lib.o):
0000000000000020 (__TEXT,__eh_frame) non-external EH_frame1
0000000000000000 (__TEXT,__text) external __Z5matchPi
0000000000000018 (__DATA,__data) weak external __ZN1AIiE6memberE
$ nm main.o
0000000000000018 s EH_frame1
U __ZN1AIiE6memberE
0000000000000000 T _main
$ ../gcc/xgcc -B../gcc main.cc -L. -llib -o t -lstdc++
so, I think this is now safe to flip with later linkers. Some type of code
like:
if (darwin_target_linker
&& (strverscmp (darwin_target_linker, "409.12") >= 0))
I think will do it. We just need to figure out when the bug was fixed. I
tested 409.12. This is the linker included with Xcode 10.0, which is the now
current Xcode. Jack or Iain might have access to older systems.
up:t mrs$ cat lib.cc
#define LIB
#include "lib.h"
template class A<int>;
bool match(int* p)
{
return p == &A<int>::member;
}
up:t mrs$ cat lib.h
template<typename T>
struct A {
static T member;
};
template<typename T>
T A<T>::member;
bool match(int*);
#ifndef LIB
extern template class A<int>;
#endif
up:t mrs$ cat main.cc
#include "lib.h"
extern char _ZN1AIiE6memberE[3];
int main()
{
void *vp = _ZN1AIiE6memberE;
// if (!match(&A<int>::member))
// throw 1;
}
is the type of test case I tried. This is _with_ the change
TARGET_WEAK_NOT_IN_ARCHIVE_TOC to make it 0. This is required to get the
symbol weak.
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
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--- Comment #13 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
Ah, yes, likely it would be ar that has changed. Anyway, the ld version is a
cheap indirect proxy for bugs in ar. We're likely to get new ar versions with
new ld versions. A real config test is fine as well.
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 01:27:00 -0000
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--- Comment #14 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
You can test it if you can dump the ar symbol table, with a assembled .s file.
Nothing needs to work except the assembler and ar and the tool to dump the
symbol table. In the olden days, there was no entry for the weak symbol. I
was wondering around trying to recall which tool dumps the ar symbol table, no
well; it seems like I used to know how to dump it, but haven't in years.
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Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
Date: Tue, 25 Sep 2018 01:44:00 -0000
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--- Comment #3 from Jim Wilson <wilson at gcc dot gnu.org> ---
Author: wilson
Date: Tue Sep 25 01:27:06 2018
New Revision: 264555
URL: https://gcc.gnu.org/viewcvs?rev=264555&root=gcc&view=rev
Log:
RISC-V: Fix problems with ilp32e ABI support.
gcc/
PR target/87391
* config/riscv/riscv.h (STACK_BOUNDARY): Test riscv_abi == ABI_ILP32E
not TARGET_RVE.
(ABI_STACK_BOUNDARY, MAX_ARGS_IN_REGISTERS): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/riscv/riscv.h
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Subject: [Bug target/87358] [8/9 Regression] ICE when -mtune=thunderx2t99 applied
Date: Tue, 25 Sep 2018 02:05:00 -0000
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--- Comment #9 from Lijian Zhang <Lijian.Zhang at arm dot com> ---
Hi Andrew,
I only reproduced this issue with gcc-7.3.0, but not able to reproduce the
failure with gcc-8.2.0/gcc-8.1.0
But from your description, gcc-8.2.0 still have this issue, and this issue is
target to be fixed in gcc-8.3.0?
Thanks.
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Subject: [Bug c++/87427] -Wclass-memaccess improvement for POD with convenience initializer
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
A common C idiom is
struct S *p = (struct S*)malloc (sizeof *p);
memset (p, 0, sizeof *p);
When such code is being ported to C++, or when C programmers are writing
analogous code in C++, it's not unusual to make the mistake of assuming that
the same code will work unchanged even when struct S has a default constructor
(or forget that it does, or add one and forget to change the dynamic
initialization). That's not the case with a struct like the one in the example
in comment #0, and the warning helps detect this mistake. We would not want to
weaken the warning to prevent detecting it.
In our view, memset (and other raw memory functions) are low-level primitives
designed for manipulating object representation at the byte level. They should
not be used with higher-level abstractions. The preferred way to initialize
objects of non-trivial types is by using their ctors, and that's what the
warning is meant to encourage.
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Subject: [Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357
Date: Tue, 25 Sep 2018 06:51:00 -0000
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--- Comment #8 from iii at gcc dot gnu.org ---
Author: iii
Date: Tue Sep 25 06:38:20 2018
New Revision: 264556
URL: https://gcc.gnu.org/viewcvs?rev=264556&root=gcc&view=rev
Log:
Fix EQ_ATTR_ALT size calculation (PR bootstrap/87417)
"r264537: Change EQ_ATTR_ALT to support up to 64 alternatives" changed
the format of EQ_ATTR_ALT from ii to ww. This broke the bootstrap on
32-bit systems, because the formula for rtx_code_size assumed that only
certain codes contain HOST_WIDE_INTs. This did not surface on 64-bit
systems, because rtunion is 8 bytes anyway, but on 32-bit systems it's
only 4 bytes. This resulted in out-of-bounds writes and memory
corruptions in genattrtab.
gcc/ChangeLog:
2018-09-25 Ilya Leoshkevich <iii@linux.ibm.com>
PR bootstrap/87417
* rtl.c (rtx_code_size): Take into account that EQ_ATTR_ALT
contains HOST_WIDE_INTs when computing its size.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/rtl.c
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
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--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Sep 25 06:50:30 2018
New Revision: 264557
URL: https://gcc.gnu.org/viewcvs?rev=264557&root=gcc&view=rev
Log:
Backport r264528
2018-09-25 Martin Liska <mliska@suse.cz>
Backport from mainline
2018-09-24 Martin Liska <mliska@suse.cz>
PR sanitizer/85774
* asan.c: Make asan_handled_variables extern.
* asan.h: Likewise.
* cfgexpand.c (expand_stack_vars): Make sure
a representative is unpoison if another
variable in the partition is handled by
use-after-scope sanitization.
2018-09-25 Martin Liska <mliska@suse.cz>
Backport from mainline
2018-09-24 Martin Liska <mliska@suse.cz>
PR sanitizer/85774
* g++.dg/asan/pr85774.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/asan/pr85774.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/asan.c
branches/gcc-8-branch/gcc/asan.h
branches/gcc-8-branch/gcc/cfgexpand.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/85774] Incorrect stack-use-after-scope caused by missing cleanup of shadow bytes
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.2.1
Resolution|--- |FIXED
Known to fail|8.2.0 |
--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/87401] [9 Regression] Runtime segfault with associated intent(out) variable
Date: Tue, 25 Sep 2018 07:09:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to Thomas Koenig from comment #2)
> Quite clear what is going on. The tree dump shows
After r264539, the CLOBBER in the dump is gone again.
However, wouldn't it be possible (desirable?) to keep it, but clobber the value
instead of the pointer (since the intent(out) argument is not a pointer here),
like so:
*o = {CLOBBER};
sub (o);
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Subject: [Bug middle-end/86078] Documentation: missing param default values
Date: Tue, 25 Sep 2018 07:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86078
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Sep 25 07:08:44 2018
New Revision: 264558
URL: https://gcc.gnu.org/viewcvs?rev=264558&root=gcc&view=rev
Log:
Document all param values and remove defaults (PR middle-end/86078).
2018-09-25 Martin Liska <mliska@suse.cz>
PR middle-end/86078
* doc/invoke.texi: Document all parameters and remove default
of the parameters.
2018-09-25 Martin Liska <mliska@suse.cz>
PR middle-end/86078
* check-params-in-docs.py: New file.
Added:
trunk/contrib/check-params-in-docs.py (with props)
Modified:
trunk/contrib/ChangeLog
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
Propchange: trunk/contrib/check-params-in-docs.py
('svn:executable' added)
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Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
Date: Tue, 25 Sep 2018 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87394
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Sep 25 07:13:59 2018
New Revision: 264562
URL: https://gcc.gnu.org/viewcvs?rev=264562&root=gcc&view=rev
Log:
Fix small coding style issues (PR fortran/87394).
2018-09-25 Martin Liska <mliska@suse.cz>
PR fortran/87394
* dbgcnt.c (dbg_cnt_process_single_pair): Return false
instead of NULL.
* dumpfile.c (dump_enable_all): Remove extra parenthesis.
* gcov-tool.c: Declare the function with ATTRIBUTE_NORETURN.
* godump.c (go_format_type): Remove extra parenthesis.
2018-09-25 Martin Liska <mliska@suse.cz>
PR fortran/87394
* decl.c (add_hidden_procptr_result): Simplify condition
as we are in branch witch 'case1 || case2'.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dbgcnt.c
trunk/gcc/dumpfile.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/gcov-tool.c
trunk/gcc/godump.c
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Subject: [Bug middle-end/86078] Documentation: missing param default values
Date: Tue, 25 Sep 2018 07:16:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/87416] [8/9 Regression] switchconv: detect identity lookup arrays
Date: Tue, 25 Sep 2018 07:25:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Good point, I think it's dup.
*** This bug has been marked as a duplicate of bug 84436 ***
>From gcc-bugs-return-616213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 07:16:29 2018
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Subject: [Bug fortran/87394] gcc/fortran/decl.c:6466:16:Semantic Issue: variable 'stree' is used uninitialized whenever 'if' condition is false: -Wsometimes-uninitialized
Date: Tue, 25 Sep 2018 07:25:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-616215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 07:25:56 2018
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Subject: [Bug c++/84436] Missed optimization with switch on enum constants returning the same value
Date: Tue, 25 Sep 2018 07:27:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 87416 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-616216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 07:27:19 2018
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From: "asb at lowrisc dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
Date: Tue, 25 Sep 2018 07:28:00 -0000
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--- Comment #4 from Alex Bradbury <asb at lowrisc dot org> ---
(In reply to Jim Wilson from comment #2)
> One can specify an architecture with FP registers, and an ABI that does not
> use the FP registers. By the same token, it is reasonable to expect that
> one should be able to specify an rv32i architecture and use an rv32e ABI
> with it. In both cases, the unused registers all become call clobbered (aka
> caller saved).
It's a reasonable expectation, but the ABI docs explicitly state it is an
illegal combination. It would make sense to propose a change to the ABI if you
want to support -mabi=ilp32e -march=rv32i.
>From gcc-bugs-return-616217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 07:28:44 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87415] [9 Regression] wrong code at -O1 and above on x86_64-linux-gnu
Date: Tue, 25 Sep 2018 07:29:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
CC| |aldyh at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to work| |8.2.0
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|wrong code at -O1 and above |[9 Regression] wrong code
|on x86_64-linux-gnu |at -O1 and above on
| |x86_64-linux-gnu
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r264307.
Better test-case:
cat pr87415.c
struct A
{
int b:1;
};
int d;
int main ()
{
struct A e = { 0 };
if (!d)
e.b = -1;
if (!e.b)
__builtin_abort ();
return 0;
}
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Subject: [Bug tree-optimization/87415] [9 Regression] wrong code at -O1 and above on x86_64-linux-gnu
Date: Tue, 25 Sep 2018 07:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
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Subject: [Bug debug/83941] Debug info generated with -flto contains useless forwarders
Date: Tue, 25 Sep 2018 07:31:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 25 07:30:56 2018
New Revision: 264564
URL: https://gcc.gnu.org/viewcvs?rev=264564&root=gcc&view=rev
Log:
2018-09-25 Richard Biener <rguenther@suse.de>
PR debug/83941
* dwarf2out.c (struct sym_off_pair): New.
(external_die_map): New global.
(lookup_decl_die): When in LTO create DIEs lazily from the
external_die_map.
(lookup_block_die): New function, create DIEs lazily in LTO.
(equate_block_to_die): New function.
(dwarf2out_die_ref_for_decl): During WPA get the association
from the external DIE map.
(dwarf2out_register_external_die): Record mapping into the
external DIE map.
(maybe_create_die_with_external_ref): New function split out from
DIE generation part of old dwarf2out_register_external_die.
(add_abstract_origin_attribute): Do not return the DIE. When
in LTO reference externals directly.
(dwarf2out_abstract_function): When in LTO ignore calls for
decls with external DIEs (already present abstract instances).
(gen_call_site_die): Adjust.
(add_high_low_attributes): Likewise.
(gen_lexical_block_die): Likewise.
(gen_inlined_subroutine_die): Likewie.
(gen_block_die): Likewise.
(dwarf2out_inline_entry): Likewise.
(dwarf2out_early_finish): In LTRANS phase create DW_TAG_imported_unit
DIEs.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
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Subject: [Bug c/87426] c_parser_unary_expression ICE
Date: Tue, 25 Sep 2018 07:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 87347 ***
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Subject: [Bug debug/83941] Debug info generated with -flto contains useless forwarders
Date: Tue, 25 Sep 2018 07:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk, if the change works out without issues I plan to backport it.
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Subject: [Bug c/87347] ICE in warn_for_abs at gcc/c/c-parser.c:9226 since r264368
Date: Tue, 25 Sep 2018 07:38:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |SztfG at yandex dot ru
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 87426 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
Date: Tue, 25 Sep 2018 07:51:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with the same revision r264408, thus I guess so.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/84436] [8/9 Regression] Missed optimization with switch on enum constants returning the same value
Date: Tue, 25 Sep 2018 07:53:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Missed optimization with |[8/9 Regression] Missed
|switch on enum constants |optimization with switch on
|returning the same value |enum constants returning
| |the same value
--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The above dup was marked as regression - adjusting bug title.
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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Vegard Nossum <vegard.nossum at oracle dot com> changed:
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----------------------------------------------------------------------------
CC| |vegard.nossum at oracle dot com
--- Comment #12 from Vegard Nossum <vegard.nossum at oracle dot com> ---
(In reply to Nathan Sidwell from comment #11)
> Fixed trunk & gcc8
I just retried this test case and wanted to note that trunk does not warn and
does not give an error, whereas gcc 8.2 gives an error. Is that the
correct/intended behaviour?
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 08:44:00 -0000
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--- Comment #15 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to mrs@gcc.gnu.org from comment #14)
> You can test it if you can dump the ar symbol table, with a assembled .s
> file. Nothing needs to work except the assembler and ar and the tool to
> dump the symbol table. In the olden days, there was no entry for the weak
> symbol. I was wondering around trying to recall which tool dumps the ar
> symbol table, no well; it seems like I used to know how to dump it, but
> haven't in years.
otool -Sv
* but that's broken on llvm-based toolchains (still listed but doesn't work)
* someone with some spare cycles might file a radar or fix it upstream
* however, that won't help people with machines stuck on 10.11 etc (like my
8core xeon).
xcrun otool-classic -Sv foo.a would also work (for as long as Apple package
otool-classic).
==== however
Back to [xc2.5] i686-darwin8, the symbol is present for
ar cru foo.a bar.o
ranlib foo.a
otool -Sv foo.a
Will try on a ppc-darwin8 system at some point.
So, at present, my inclination is to (not a patch, just the intent):
gcc/config/darwin.h:
#undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
gcc/config/rs6000/darwin7.h:
#undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
Since the original bug is against powerpc-darwin7 and we don't have anyone on
this thread able to test if it was fixed there;
As noted, I have my doubts whether xc1.5 is able to build current GCC (ISTR
that odcctools was required at some point - and, if that's so, then someone
trying to build for really ancient darwin is probably better off making a newer
cctools and ld64).
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/87428] New: "Missed" inline instances cause bogus DWARF to be emitted
Date: Tue, 25 Sep 2018 08:46:00 -0000
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Bug ID: 87428
Summary: "Missed" inline instances cause bogus DWARF to be
emitted
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
Currently inlined_function_outer_scope_p keys on BLOCK_SOURCE_LOCATION but
instrumenting tree-inline like
Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c (revision 264564)
+++ gcc/tree-inline.c (working copy)
@@ -4527,10 +4527,11 @@ expand_call_inline (basic_block bb, gimp
not refer to them in any way to not break GC for locations. */
if (gimple_block (stmt))
{
+ location_t loc = LOCATION_LOCUS (gimple_location (stmt));
id->block = make_node (BLOCK);
BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
- BLOCK_SOURCE_LOCATION (id->block)
- = LOCATION_LOCUS (gimple_location (stmt));
+ BLOCK_SOURCE_LOCATION (id->block) = loc;
+ gcc_checking_assert (loc != UNKNOWN_LOCATION);
prepend_lexical_block (gimple_block (stmt), id->block);
}
shows we hit this a lot, for example in g++.dg/pr54655.C where one
destructor call doesn't have a location. Slightly altering the testcase to
extern "C" class A
{
};
int cnt;
template <typename T> class B:A
{
public:
B (int *, T);
~B ()
{
volatile int x = 1;
cnt+=x;
}
};
bool a;
inline void
fn1 ()
{
switch (0)
case 0:
{
B <int*> b (0, 0);
if (a)
break;
}
}
void
fn2 ()
{
fn1 ();
}
shows the following debug information generated for the respective inline
instance of B::~B ():
<1><e4>: Abbrev Number: 15 (DW_TAG_subprogram)
<e5> DW_AT_specification: <0xac>
<e9> DW_AT_object_pointer: <0xf2>
<ed> DW_AT_inline : 2 (declared as inline but ignored)
<ee> DW_AT_sibling : <0x111>
...
<4><1cc>: Abbrev Number: 30 (DW_TAG_lexical_block)
<1cd> DW_AT_abstract_origin: <0xe4>
<1d1> DW_AT_low_pc : 0x38
<1d9> DW_AT_high_pc : 0x12
<1e1> DW_AT_sibling : <0x211>
<5><1e5>: Abbrev Number: 28 (DW_TAG_formal_parameter)
<1e6> DW_AT_abstract_origin: <0xf2>
<1ea> DW_AT_location : 0x29 (location list)
<1ee> DW_AT_GNU_locviews: 0x27
<5><1f2>: Abbrev Number: 29 (DW_TAG_lexical_block)
<1f3> DW_AT_abstract_origin: <0x104>
<1f7> DW_AT_low_pc : 0x38
<1ff> DW_AT_high_pc : 0x12
<6><207>: Abbrev Number: 26 (DW_TAG_variable)
<208> DW_AT_abstract_origin: <0x105>
<20c> DW_AT_location : 2 byte block: 91 68 (DW_OP_fbreg: -24)
<6><20f>: Abbrev Number: 0
<5><210>: Abbrev Number: 0
...
which violates the constraints on DW_AT_abstract_origin (same tag
requirement). I couldn't find any wording that DW_TAG_formal_parameter
shouldn't be child of a DW_TAG_lexical_block but at least that looks odd.
gdb gets confused here because it processes DW_TAG_formal_paramters
of DW_TAG_subprogram/DW_TAG_inlined_subroutine differently from other
places when LTO pulls in an inline instance from a CU with a different
source language (see PR87362).
I think that ultimately we want to see a DW_TAG_inlined_subroutine here
and thus inlined_function_outer_scope_p return true. I've tried to
change that to simply look at BLOCK_ABSTRACT_ORIGIN instead but that
now breaks with the recent addition of another kind of DEBUG stmts...
(NOTE_INSN_INLINE_ENTRY keying on a location and then relying on getting
the correct block back out).
So I don't have a good solution ready here (apart from trying to have
locations for all calls that get inlined... and eventually going the
!gimple_block (stmt) way if we don't).
>From gcc-bugs-return-616228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 08:46:19 2018
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From: "zamazan4ik at tut dot by" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87429] New: Strange overload resolution with decltype in template function
Date: Tue, 25 Sep 2018 08:49:00 -0000
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Bug ID: 87429
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gcc(trunk) for this code:
#include <iostream>
template <typename T> int foo(int) { return 1; }
template <typename T> int foo(decltype(T{})) { return 2; }
template <typename T> int foo(decltype(int(T{}))) { return 3;}
int main()
{
std::cout << foo<int>(0);
}
prints '2'. But as I understand here should be compilation error because of
ambiguous call to overload function
>From gcc-bugs-return-616229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 08:49:49 2018
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Tue, 25 Sep 2018 08:53:00 -0000
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--- Comment #30 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I've started a new bootstrap without my previous changes to get the log.
I'll post the command once that finishes.
>From gcc-bugs-return-616230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 08:53:39 2018
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Tue, 25 Sep 2018 09:01:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Eugeniu Rosca from comment #5)
> > In C90, it was implemented defined behavior (while in C99 and above it is undefined behavior).
>
> I trust you, but why not giving a reference to the source?
He already did. Comment 1 quotes the GCC manual which references the relevant
sections of the standards.
It takes time and effort to look the references up in the old standards. If you
need more precise answers *you* should look it up.
In C90 it's 6.3.7 (and repeated in G.3.5), in C99 it's 6.5.7 (and J.2).
> - Since U-Boot is compiled using '-std=gnu11' and since UBSAN reports (1 <<
> 31) as undefined behavior and since C11 standard says that encountering an
> UB the compiler may "ignore the situation completely with unpredictable
> results",
It may do that, or it may do other things (like print a UBsan error).
> what are there real-life issues expected from shifting signed
> integers into (*not past*) the sign bit? What to expect in the worst case?
I think with GCC the worst that will happen is you get a UBsan error (which
might make the program abort, depending on the options used to compile it).
> - Is it possible to provide a sample code which would showcase that
> "left-shifting into the sign bit" can lead to program behavior being
> erroneous, unexpected or dependent on the gcc optimization level? For
> example, we know [17] that "(a + 1 > a)" can lead to surprising results
> depending on whether the program is compiled with "-fwrapv" or not. Are
> there any similar examples involving '<<' ? This would be of extreme help
> for U-Boot community.
You've already been given the link to the GCC documentation which says that GCC
doesn't treat it as undefined in C99 and C11, even though the standards (and
UBsan) say it's undefined.
There is no bug here. It's correct for UBsan to depend on the C standard
chosen, because what is and isn't undefined depends on the standard.
> - What would be your personal choice between '-std=gnu89' (still used by
> Linux kernel) and '-std=gnu11' (used in U-Boot/coreboot), given your GCC
> experience gathered so far?
There's no one-size-fits-all answer.
>From gcc-bugs-return-616231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 09:01:29 2018
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Subject: [Bug c/80868] "Duplicate const" warning emitted in `const typeof(foo) bar;`
Date: Tue, 25 Sep 2018 09:03:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The observation in comment 5 probably warrants its own bug report.
George, do you agree with closing this?
>From gcc-bugs-return-616232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 09:03:30 2018
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Subject: [Bug debug/87428] "Missed" inline instances cause bogus DWARF to be emitted
Date: Tue, 25 Sep 2018 09:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-debug
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-09-25
CC| |hubicka at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Blocks| |87362
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following "works" for example (dropping most debuginfo for the inline
instance):
Index: tree-inline.c
===================================================================
--- tree-inline.c (revision 264564)
+++ tree-inline.c (working copy)
@@ -4525,7 +4525,8 @@ expand_call_inline (basic_block bb, gimp
artificial decls inserted by the compiler itself. We need to
either link the inlined blocks into the caller block tree or
not refer to them in any way to not break GC for locations. */
- if (gimple_block (stmt))
+ if (gimple_block (stmt)
+ || LOCATION_LOCUS (gimple_location (stmt)) == UNKNOWN_LOCATION)
{
id->block = make_node (BLOCK);
BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
@@ -4591,7 +4592,7 @@ expand_call_inline (basic_block bb, gimp
if (DECL_INITIAL (fn))
{
- if (gimple_block (stmt))
+ if (id->block)
{
tree *var;
likewise setting BLOCK_SOURCE_LOCATION to BUILTINS_LOCATION instead of
UNKNOWN_LOCATION (but that seems to be a hack, but we do get
DW_TAG_inlined_subroutine back that way).
So - any opinion / guidance?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362
[Bug 87362] GCC produces with LTO debug info with which gdb is not happy about
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Subject: [Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible
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--- Comment #29 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm got a patch candidate for which I did testing of allmodconfig
configuration.
Sorting all violations against 2KB of stack memory:
Before:
TOTAL warnings: 185
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 23624
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 14144
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 11504
lib/atomic64_test.c:250:1: 11192
lib/atomic64_test.c:148:1: 10352
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1: 8680
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1: 7712
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1: 7592
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1: 7472
drivers/media/dvb-frontends/stv090x.c:3431:1: 6808
mm/vmscan.c:1497:1: 6688
fs/fscache/stats.c:286:1: 6536
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1: 6456
drivers/media/dvb-frontends/stv090x.c:3090:1: 5880
lib/test_overflow.c:483:1: 5856
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1: 5792
drivers/media/dvb-frontends/stv090x.c:1595:1: 5304
drivers/scsi/fnic/fnic_trace.c:451:1: 5008
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1: 4912
drivers/media/dvb-frontends/stv090x.c:4265:1: 4840
net/wireless/nl80211.c:2102:1: 4656
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1: 4416
drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1: 4376
drivers/scsi/lpfc/lpfc_attr.c:510:1: 4272
fs/btrfs/relocation.c:1149:1: 4224
drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1: 4216
drivers/acpi/nfit/core.c:3213:1: 4176
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1: 4128
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1: 4032
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1853:1: 4000
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1: 3968
fs/jbd2/commit.c:1129:1: 3920
drivers/scsi/lpfc/lpfc_debugfs.c:978:1: 3896
fs/ocfs2/super.c:1234:1: 3856
drivers/media/dvb-frontends/cxd2841er.c:3302:1: 3816
drivers/media/dvb-frontends/stv0910.c:1547:1: 3808
drivers/media/dvb-frontends/stv0367.c:2607:1: 3744
net/core/ethtool.c:2872:1: 3584
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1962:1: 3472
kernel/rcu/tree.c:2239:1: 3448
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: 3424
fs/ocfs2/namei.c:1691:1: 3400
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1527:1: 3392
mm/khugepaged.c:1565:1: 3296
drivers/media/dvb-frontends/stv090x.c:1952:1: 3272
drivers/staging/rtl8723bs/hal/HalBtc8723b2Ant.c:2924:1: 3208
kernel/fork.c:2104:1: 3192
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: 3160
drivers/media/dvb-frontends/cxd2841er.c:3501:1: 3152
drivers/scsi/snic/snic_debugfs.c:355:1: 3064
fs/ocfs2/aops.c:1906:1: 3032
drivers/media/dvb-frontends/stv090x.c:1854:1: 3008
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:1171:1: 2992
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:399:1: 2984
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:405:1: 2984
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1434:1: 2976
arch/x86/kernel/cpu/mshyperv.c:307:1: 2960
net/sched/cls_flower.c:1286:1: 2936
drivers/isdn/hardware/avm/b1.c:637:1: 2936
fs/f2fs/segment.c:4182:1: 2912
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1: 2904
net/rxrpc/call_event.c:459:1: 2896
drivers/rapidio/devices/rio_mport_cdev.c:2129:1: 2872
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1503:1: 2848
fs/nfs/write.c:1357:1: 2840
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3999:1: 2840
fs/nfs/pnfs.c:2023:1: 2832
net/caif/cfctrl.c:549:1: 2824
drivers/block/drbd/drbd_req.c:1447:1: 2800
mm/gup.c:1757:1: 2792
fs/ocfs2/xattr.c:3686:1: 2784
drivers/media/dvb-frontends/cxd2841er.c:3639:1: 2784
fs/ocfs2/super.c:2355:1: 2768
net/sctp/socket.c:7632:1: 2768
drivers/net/wireless/ralink/rt2x00/rt73usb.c:734:1: 2760
drivers/net/ethernet/rocker/rocker_ofdpa.c:563:1: 2760
net/rxrpc/input.c:1362:1: 2752
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1323:1: 2752
drivers/media/dvb-frontends/cxd2841er.c:3132:1: 2744
fs/btrfs/disk-io.c:3341:1: 2720
drivers/iio/common/ssp_sensors/ssp_spi.c:449:1: 2720
fs/f2fs/gc.c:825:1: 2704
fs/xfs/libxfs/xfs_rmap.c:1348:1: 2696
fs/ocfs2/dlm/dlmmaster.c:2767:1: 2664
lib/test_overflow.c:588:1: 2648
net/core/rtnetlink.c:1700:1: 2648
drivers/gpu/drm/tinydrm/ili9225.c:260:1: 2616
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:591:1: 2616
fs/f2fs/gc.c:1250:1: 2608
fs/nfsd/export.c:652:1: 2608
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:6805:1: 2608
mm/rmap.c:1627:1: 2600
net/bridge/br_netlink.c:1481:1: 2592
drivers/media/tuners/r820t.c:1327:1: 2576
drivers/media/dvb-frontends/stv090x.c:2069:1: 2544
drivers/scsi/qla2xxx/qla_isr.c:1257:1: 2544
fs/btrfs/tree-log.c:3185:1: 2528
drivers/md/md.c:8645:1: 2528
drivers/media/dvb-frontends/stv090x.c:2508:1: 2528
lib/rbtree.c:481:1: 2520
lib/rbtree.c:463:1: 2520
mm/page_alloc.c:5041:1: 2512
mm/migrate.c:576:1: 2512
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4834:1: 2512
net/rxrpc/recvmsg.c:608:1: 2488
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3181:1: 2488
drivers/firmware/efi/test/efi_test.c:688:1: 2480
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:836:1: 2480
drivers/media/pci/solo6x10/solo6x10-disp.c:289:1: 2472
net/mac80211/util.c:2263:1: 2464
drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:189:1: 2464
mm/ksm.c:2180:1: 2456
fs/ocfs2/dlm/dlmrecovery.c:752:1: 2456
drivers/block/drbd/drbd_req.c:1624:1: 2448
drivers/input/mouse/cyapa_gen5.c:2434:1: 2440
drivers/net/macsec.c:2597:1: 2432
drivers/scsi/fnic/fnic_fcs.c:918:1: 2424
net/rxrpc/rxkad.c:399:1: 2400
fs/nilfs2/segment.c:1530:1: 2392
fs/cachefiles/rdwr.c:674:1: 2384
mm/memory-failure.c:1925:1: 2384
fs/userfaultfd.c:1843:1: 2384
net/wireless/nl80211.c:4796:1: 2376
drivers/scsi/lpfc/lpfc_nvmet.c:1462:1: 2376
fs/ocfs2/namei.c:2064:1: 2368
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1122:1: 2368
drivers/infiniband/hw/hfi1/rc.c:2482:1: 2360
fs/ocfs2/dlm/dlmmaster.c:1013:1: 2352
drivers/media/dvb-frontends/cxd2841er.c:3211:1: 2344
net/wireless/nl80211.c:6130:1: 2328
drivers/input/touchscreen/ads7846.c:1459:1: 2312
mm/swapfile.c:2236:1: 2304
mm/migrate.c:726:1: 2304
fs/ocfs2/dir.c:3107:1: 2304
sound/soc/intel/haswell/sst-haswell-ipc.c:640:1: 2296
net/smc/smc_cdc.c:323:1: 2296
drivers/media/i2c/saa6752hs.c:555:1: 2288
net/wireless/nl80211.c:1586:1: 2272
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1: 2272
mm/shmem.c:1937:1: 2256
fs/xfs/xfs_log_recover.c:2008:1: 2256
fs/f2fs/file.c:1189:1: 2248
net/ieee802154/nl802154.c:551:1: 2248
drivers/block/drbd/drbd_state.c:2039:1: 2240
fs/ocfs2/namei.c:503:1: 2232
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:1681:1: 2224
mm/memory-failure.c:1419:1: 2216
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:7378:1: 2216
mm/madvise.c:441:1: 2208
drivers/net/virtio_net.c:984:1: 2200
drivers/media/dvb-frontends/stv0910.c:1613:1: 2192
drivers/media/i2c/cx25840/cx25840-core.c:460:1: 2192
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c:5138:1: 2176
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c:830:1: 2168
drivers/isdn/hardware/eicon/message.c:5985:1: 2160
drivers/media/pci/saa7134/saa7134-cards.c:8068:1: 2160
arch/x86/kvm/emulate.c:2562:1: 2152
drivers/net/wireless/ath/ath9k/ar9003_mac.c:158:1: 2152
fs/xfs/libxfs/xfs_alloc.c:1383:1: 2144
lib/test_overflow.c:606:1: 2128
drivers/i2c/busses/i2c-fsi.c:638:1: 2128
arch/x86/kvm/x86.c:4059:1: 2120
fs/btrfs/scrub.c:3394:1: 2112
block/blk-cgroup.c:1026:1: 2112
drivers/staging/erofs/unzip_vle.c:999:1: 2112
drivers/media/dvb-frontends/stv090x.c:4580:1: 2104
drivers/media/dvb-frontends/stv090x.c:2137:1: 2104
drivers/net/ethernet/intel/igb/igb_ethtool.c:2079:1: 2104
drivers/scsi/qla4xxx/ql4_nx.c:3218:1: 2104
fs/ntfs/mft.c:2764:1: 2096
net/wireless/scan.c:1059:1: 2096
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c:4349:1: 2096
drivers/net/ethernet/broadcom/cnic.c:2725:1: 2096
net/rxrpc/rxkad.c:499:1: 2088
drivers/net/bonding/bond_netlink.c:677:1: 2088
mm/shmem.c:987:1: 2080
fs/f2fs/debug.c:130:1: 2080
drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:95:1: 2080
drivers/media/dvb-frontends/stv090x.c:1207:1: 2080
drivers/media/dvb-frontends/stv090x.c:1164:1: 2080
drivers/staging/pi433/rf69.c:613:1: 2080
net/mac802154/iface.c:201:1: 2072
fs/ocfs2/dlm/dlmmaster.c:2050:1: 2064
drivers/media/dvb-frontends/stv090x.c:4774:1: 2064
mm/compaction.c:959:1: 2056
after:
TOTAL warnings: 43
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 11880
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 7264
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 5840
lib/atomic64_test.c:250:1: 5656
lib/atomic64_test.c:148:1: 5232
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1: 4392
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1: 3904
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1: 3848
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1: 3792
drivers/media/dvb-frontends/stv090x.c:3431:1: 3512
mm/vmscan.c:1497:1: 3488
fs/fscache/stats.c:286:1: 3336
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1: 3288
drivers/media/dvb-frontends/stv090x.c:3090:1: 3032
lib/test_overflow.c:483:1: 2976
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: 2976
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1: 2944
drivers/media/dvb-frontends/stv090x.c:1595:1: 2712
drivers/scsi/fnic/fnic_trace.c:451:1: 2640
drivers/media/dvb-frontends/stv0910.c:1547:1: 2624
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: 2616
net/wireless/nl80211.c:2102:1: 2544
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1: 2512
net/core/ethtool.c:2872:1: 2496
fs/jbd2/commit.c:1129:1: 2480
drivers/media/dvb-frontends/stv090x.c:4265:1: 2472
net/sched/cls_flower.c:1286:1: 2392
fs/btrfs/relocation.c:1149:1: 2368
drivers/acpi/nfit/core.c:3213:1: 2352
drivers/scsi/lpfc/lpfc_attr.c:510:1: 2320
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1: 2272
drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1: 2264
drivers/iio/common/ssp_sensors/ssp_spi.c:449:1: 2176
drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1: 2168
fs/ocfs2/super.c:1234:1: 2160
fs/ocfs2/namei.c:1691:1: 2152
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1: 2144
kernel/rcu/tree.c:2239:1: 2136
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1: 2112
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1: 2080
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1: 2080
drivers/scsi/lpfc/lpfc_debugfs.c:978:1: 2072
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1: 2072
Which is very promising improvement I would say.
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87430
Bug ID: 87430
Summary: ICE in fortran/trans-types.c:1157
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Hi,
The following code result in a crash of the compiler. The code is
non-conforming.
module xlexical_mod
contains
subroutine lexical_preprocessing(image_text)
implicit none
character(len=*) :: image_text
character(len=10), dimension(:), allocatable :: elements
character(len=3) :: label
integer serial
!integer i
allocate(elements(10))
do i=2, size(elements)
associate(el => elements(i))
read(el(1:2), *) serial
end associate
end do
end subroutine
end module
The crash is:
../crystals/crash.F90:5:0:
subroutine lexical_preprocessing(image_text)
internal compiler error: in gfc_typenode_for_spec, at
fortran/trans-types.c:1157
0x58a9be gfc_typenode_for_spec(gfc_typespec*, int)
../../gcc/fortran/trans-types.c:1157
0x70b5fc gfc_sym_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:2268
0x6b64ed gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1728
0x6b94c7 generate_local_decl
../../gcc/fortran/trans-decl.c:5595
0x67f502 do_traverse_symtree
../../gcc/fortran/symbol.c:4165
0x6ba0ba generate_local_vars
../../gcc/fortran/trans-decl.c:5795
0x6ba0ba gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6442
0x697819 gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2222
0x64aeeb translate_all_program_units
../../gcc/fortran/parse.c:6108
0x64aeeb gfc_parse_file()
../../gcc/fortran/parse.c:6324
0x69128f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-616237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 09:37:48 2018
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Subject: [Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible
Date: Tue, 25 Sep 2018 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715
--- Comment #30 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Martin Liška from comment #29)
> I'm got a patch candidate for which I did testing of allmodconfig
> configuration.
> Sorting all violations against 2KB of stack memory:
>
> Before:
> TOTAL warnings: 185
>
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 23624
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 14144
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 11504
> lib/atomic64_test.c:250:1: 11192
> lib/atomic64_test.c:148:1: 10352
This is with -fsanitize-address-use-after-scope, right?
> after:
>
> TOTAL warnings: 43
>
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 11880
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 7264
> drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 5840
> lib/atomic64_test.c:250:1: 5656
> lib/atomic64_test.c:148:1: 5232
>
> Which is very promising improvement I would say.
Agreed, this looks great. With most of the warnings against the
2048 byte limit gone, we can probably work around the remaining
ones by doing local code changes in the kernel. I had patches for
some of these in the past, which I can dig up then.
>From gcc-bugs-return-616238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 09:44:38 2018
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Subject: [Bug tree-optimization/87402] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645
Date: Tue, 25 Sep 2018 09:47:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Caused by the fix for PR87263 where I reverted some "fixes" (you might call
them workarounds) for earlier -O[1g] issues. This is now a testcase for the
SSA_VAL (backedge_val) != backedge_val case I reverted here:
@@ -4207,9 +4204,7 @@ visit_phi (gimple *phi, bool *inserted,
&& !seen_non_backedge
&& TREE_CODE (backedge_val) == SSA_NAME
&& sameval == backedge_val
- && (SSA_NAME_IS_VIRTUAL_OPERAND (backedge_val)
- || !SSA_VISITED (backedge_val)
- || SSA_VAL (backedge_val) != backedge_val))
+ && SSA_NAME_IS_VIRTUAL_OPERAND (backedge_val))
/* Note this just drops to VARYING without inserting the PHI into
the hashes. */
result = PHI_RESULT (phi);
ultimatively the question is whether we may actually use the SSA_VAL here.
For this testcase we made the backedge executable as we're visiting along
it compared to when we do that because we cannot trust its executable state.
Of course we'd need to track this difference somehow...
That said, reverting part of the above is going to work, but I'm fist
re-testing
disabling of pessimistic PHI backedge treatment (and hope we have a testcase
that breaks - otherwise I'll likely wait for one there...).
>From gcc-bugs-return-616239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 09:47:41 2018
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Subject: [Bug tree-optimization/87042] UBSAN: poly-int.h:1095:5: runtime error: signed integer overflow: 9223372036854775807 * 8 cannot be represented in type 'long int'
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Leaving for now ..
>From gcc-bugs-return-616240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 10:09:34 2018
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Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-09-21 00:00:00 |2018-9-25
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--- Comment #2 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Can reproduce.
>From gcc-bugs-return-616241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 10:20:02 2018
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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87431] New: valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 10:22:00 -0000
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Bug ID: 87431
Summary: valueless_by_exception() should unconditionally return
false if all the constructors are noexcept
Product: gcc
Version: 9.0
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Right now the variant::valueless_by_exception() calls !_M_valid() that is
defined like that:
_M_valid() const noexcept
{
return this->_M_index != __index_type(variant_npos);
}
Above code is quite complex for the optimizer. It may be profitable to detect
variant types that never have valueless_by_exception() state and re-implement
_M_valid:
_M_valid() const noexcept
{
return __always_valid::value /*compile-time constant*/ ||
this->_M_index != __index_type(variant_npos);
}
Such change would improve assembly for multiple functions including
comparisons, swap, get, constructors.
>From gcc-bugs-return-616242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 10:22:25 2018
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Subject: [Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible
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--- Comment #31 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Arnd Bergmann from comment #30)
> (In reply to Martin Liška from comment #29)
> > I'm got a patch candidate for which I did testing of allmodconfig
> > configuration.
> > Sorting all violations against 2KB of stack memory:
> >
> > Before:
> > TOTAL warnings: 185
> >
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 23624
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 14144
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 11504
> > lib/atomic64_test.c:250:1: 11192
> > lib/atomic64_test.c:148:1: 10352
>
> This is with -fsanitize-address-use-after-scope, right?
Yes.
>
> > after:
> >
> > TOTAL warnings: 43
> >
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 11880
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 7264
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 5840
> > lib/atomic64_test.c:250:1: 5656
> > lib/atomic64_test.c:148:1: 5232
> >
> > Which is very promising improvement I would say.
>
> Agreed, this looks great. With most of the warnings against the
> 2048 byte limit gone, we can probably work around the remaining
> ones by doing local code changes in the kernel. I had patches for
> some of these in the past, which I can dig up then.
Just out of curiosity. Am I right that you're using KASAN build for
syzkaller or an other fuzzer? If so, I bet you can't hit most of the
stack overflows in drivers as you very probably don't have the
real hardware?
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 10:29:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
Ever confirmed|0 |1
>From gcc-bugs-return-616245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 10:44:30 2018
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 10:44:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Can we do any better than this?
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -439,6 +439,8 @@ namespace __variant
constexpr bool
_M_valid() const noexcept
{
+ if constexpr ((is_scalar_v<_Types> && ...))
+ return true;
return this->_M_index != __index_type(variant_npos);
}
Any non-scalar type can have a constructor that throws, which could be called
via variant::emplace.
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Subject: [Bug c++/87429] Strange overload resolution with decltype in template function
Date: Tue, 25 Sep 2018 10:44:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang also compiles it, and prints "1".
EDG rejects it as ambiguous:
"a.cc", line 8: error: more than one instance of overloaded function "foo"
matches the argument list:
function template "int foo<T>(int)"
function template "int foo<T>(int)"
argument types are: (int)
return foo<int>(0);
^
1 error detected in the compilation of "a.cc".
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Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
Date: Tue, 25 Sep 2018 11:08:00 -0000
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
The ICE occurs because of a mismatch between the movw/movt splitter for
arm_disable_literal_pool (-mslow-flash-data) and the arm_movt instruction
pattern. The latter is guarded by -mword-relocations being disabled (via
arm_valid_symbolic_address_p) since it requires patching a 16-bit immediate but
not the former. Adding a similar check in the splitter causes relocation error
at assembly time though as GCC generate symbol+offset references instead of
doing the add as a separate instructions.
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible
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--- Comment #32 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Martin Liška from comment #31)
> (In reply to Arnd Bergmann from comment #30)
> > (In reply to Martin Liška from comment #29)
> > > Which is very promising improvement I would say.
> >
> > Agreed, this looks great. With most of the warnings against the
> > 2048 byte limit gone, we can probably work around the remaining
> > ones by doing local code changes in the kernel. I had patches for
> > some of these in the past, which I can dig up then.
>
> Just out of curiosity. Am I right that you're using KASAN build for
> syzkaller or an other fuzzer? If so, I bet you can't hit most of the
> stack overflows in drivers as you very probably don't have the
> real hardware?
No, I don't do any fuzzing myself. The side project that I'm
interested in here is to build the kernel in all random
configurations without compile-time warnings that may indicate
bugs. I tend to build several hundred such kernels per day to
catch new bugs in both the (linux-next) kernel and in the
toolchain (clang and gcc).
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/63155] [6/7/8 Regression] memory hog
Date: Tue, 25 Sep 2018 12:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[6/7/8/9 Regression] memory |[6/7/8 Regression] memory
|hog |hog
--- Comment #33 from Richard Biener <rguenth at gcc dot gnu.org> ---
So on trunk for the original testcase I now see
> /usr/bin/time ./cc1 -quiet testunity_Runner.i -std=c99
2.70user 0.16system 0:02.86elapsed 100%CPU (0avgtext+0avgdata
427672maxresident)k
0inputs+504outputs (0major+106295minor)pagefaults 0swaps
while on the same machine using GCC 4.8:
> /usr/bin/time /space/rguenther/install/gcc-4.8.5/bin/gcc -S testunity_Runner.i -std=c99
0.24user 0.01system 0:00.60elapsed 41%CPU (0avgtext+0avgdata 39424maxresident)k
30960inputs+504outputs (37major+8516minor)pagefaults 0swaps
so we've come a long way but still regressed which is somehow not avoidable
because of the correctness fix that started this.
For reference GCC 8.2 numbers are
> /usr/bin/time /space/rguenther/install/gcc-8.2/bin/gcc -S testunity_Runner.i -std=c99
94.31user 2.46system 1:36.79elapsed 99%CPU (0avgtext+0avgdata
10172916maxresident)k
0inputs+504outputs (0major+2535422minor)pagefaults 0swaps
So overall I consider this issue fixed for trunk.
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
Date: Tue, 25 Sep 2018 12:32:00 -0000
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--- Comment #23 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 25 12:25:44 2018
New Revision: 264565
URL: https://gcc.gnu.org/viewcvs?rev=264565&root=gcc&view=rev
Log:
Check pie_enabled target in PIC tests
We need to check pie_enabled target in PIC tests to support GCC where
PIE is enabled by default when configured with --enable-default-pie.
PR testsuite/70150
* gcc.dg/20020312-2.c (dg-additional-options): Set to "-no-pie"
for pie_enabled target.
* gcc.dg/uninit-19.c: Check pie_enabled for PIC.
* gcc.target/i386/pr34256.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/20020312-2.c
trunk/gcc/testsuite/gcc.dg/uninit-19.c
trunk/gcc/testsuite/gcc.target/i386/pr34256.c
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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 12:48:00 -0000
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--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
New intrinsic could be added into the GCC... something like
__builtin_all_constructors_nothrow(type)
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Subject: [Bug tree-optimization/87402] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-616251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 12:48:06 2018
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Subject: [Bug tree-optimization/87415] [9 Regression] wrong code at -O1 and above on x86_64-linux-gnu
Date: Tue, 25 Sep 2018 12:52:00 -0000
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Aldy Hernandez <aldyh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
All mine baby!
For a 1-bit signed field we are trying to subtract the following ranges:
[0, 0] - VR_VARYING
Mathematically these are:
[0, 0] - [MIN, MAX]
=> [0, 0] - [-1, 0]
[Because 1-bit signed fields go from -1 to 0, supposedly to make two's
complement work, but really to piss me off.]
For ranges: [a, b] - [c, d] is [a - d, b - c], so combine_bounds() yields:
[0, OVERFLOW]
Then we adjust the result for overflows in set_value_range_with_overflow() we
transform the above into:
[0, +INF]
And since +INF is 0, we get [0, 0] which is incorrect.
[0, 0] - [MIN, MAX] should have given [MIN, MAX].
I'm still trying to work this out without special casing 1-bit fields. But the
original patch is correct-- perhaps we should adjust
set_value_range_with_overflow... not sure yet.
>From gcc-bugs-return-616253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 12:52:34 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87402] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645
Date: Tue, 25 Sep 2018 12:55:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 25 12:51:57 2018
New Revision: 264566
URL: https://gcc.gnu.org/viewcvs?rev=264566&root=gcc&view=rev
Log:
2018-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/87402
* tree-ssa-sccvn.c (SSA_VISITED): Remove unused function.
(visit_phi): Re-instantiate handling of supposed to be VARYING
but non-VARYING backedge value.
* gcc.dg/torture/pr87402.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87402.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-616254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 12:55:48 2018
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Subject: [Bug debug/87432] New: LTO produced debug info makes gdb slow
Date: Tue, 25 Sep 2018 12:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87432
Bug ID: 87432
Summary: LTO produced debug info makes gdb slow
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
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For example starting gdb on LTO bootstrapped cc1 takes s and ~1.8GB memory for
me. Setting a breakpoint on do_rpo_vn takes another 3s. That feels a lot
slower than doing this on a non-LTO bootstrapped cc1.
This bug is to track what _GCC_ can do better here.
>From gcc-bugs-return-616256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 13:19:33 2018
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Subject: [Bug fortran/84674] [7/8/9 Regression] Derived type name change makes a program segfault, removing non_overridable helps
Date: Tue, 25 Sep 2018 13:19:00 -0000
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Libavius <daraja at web dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daraja at web dot de
--- Comment #4 from Libavius <daraja at web dot de> ---
I got a bug, which I think is related to the one described here and wanted to
avoid opening another bug report.
I tried my best to build a small minimal example (see bottom). It compiles with
all compilers I tried. However with gfortran 6.3.1, gfortran 7.3.1 and gfortran
8.1.0 it does not produce the wanted result (see test.f90).
With gfortran 4.8.5, nag 6.2 and intel 18.0.3 it runs as expected.
I carried out all tests on CentOS 7.4 and Ubuntu 16.04.
With a debugger, I could see: in test.f90, F%get() is called (line 8), the
program then moves into child_get() in module2.f90 (line 35) as it should.
However, stepping into this%calc() (line 39), it moves to child_reset() in
module1.f90 (line 31) instead of child2_calc() in module2.f90 (line 15).
There are two ways to get this program to work, which are both quite weird:
1. remove "non_overridable" from line 14 in module1.f90
old: procedure, pass, non_overridable :: get => child_get
new: procedure, pass :: get => child_get
2. merge module1 and module2 into one module.
FILES:
***module1.f90:
module module1
implicit none
private
public :: child
type, abstract :: parent
contains
procedure, pass :: reset => parent_reset
end type parent
type, extends(parent), abstract :: child
contains
procedure, pass, non_overridable :: reset => child_reset
procedure, pass, non_overridable :: get => child_get
procedure(calc_i), pass, deferred :: calc
end type child
abstract interface
pure function calc_i(this) result(value)
import :: child
class(child), intent(in) :: this
integer :: value
end function calc_i
end interface
contains
pure subroutine parent_reset(this)
class(parent), intent(inout) :: this
end subroutine parent_reset
pure subroutine child_reset(this)
class(child), intent(inout) :: this
end subroutine child_reset
function child_get(this) result(value)
class(child), intent(inout) :: this
integer :: value
value = this%calc()
end function child_get
end module module1
***module2.f90:
module module2
use module1, only: child
implicit none
private
public :: child2
type, extends(child) :: child2
contains
procedure, pass :: calc => child2_calc
end type child2
contains
pure function child2_calc(this) result(value)
class(child2), intent(in) :: this
integer :: value
value = 1
end function child2_calc
end module module2
***test.f90:
program test
use module2, only: child2
implicit none
type(child2) :: F
if (F%get() /= 1) stop ': FAILED'
end program test
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Subject: [Bug debug/87432] LTO produced debug info makes gdb slow
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |lto
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
CC| |vries at gcc dot gnu.org
Version|8.2.1 |9.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362#c6 for some profiling of
gdb - the time is spent building its symbol table and the memory is likely used
because it pulls in all (too many) DIEs.
>From gcc-bugs-return-616257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 13:19:54 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Tue, 25 Sep 2018 13:21:00 -0000
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--- Comment #37 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Paul, here is a simple reproducer of 89 lines, this should now make it
relatively
easy to debug, I am using gcc trunk revision r264501.
Here is the code (I will also attach it), it contains also a workaround for the
runtime error:
module phs_fks
implicit none
private
public :: phs_identifier_t
public :: phs_fks_t
type :: phs_identifier_t
integer, dimension(:), allocatable :: contributors
contains
procedure :: init => phs_identifier_init
end type phs_identifier_t
type :: phs_fks_t
type(phs_identifier_t), dimension(:), allocatable :: phs_identifiers
end type phs_fks_t
contains
subroutine phs_identifier_init &
(phs_id, contributors)
class(phs_identifier_t), intent(out) :: phs_id
integer, intent(in), dimension(:) :: contributors
allocate (phs_id%contributors (size (contributors)))
phs_id%contributors = contributors
end subroutine phs_identifier_init
end module phs_fks
!!!!!
module instances
use phs_fks
implicit none
private
public :: process_instance_t
type :: nlo_event_deps_t
type(phs_identifier_t), dimension(:), allocatable :: phs_identifiers
end type nlo_event_deps_t
type :: process_instance_t
type(phs_fks_t), pointer :: phs => null ()
type(nlo_event_deps_t) :: event_deps
contains
procedure :: init => process_instance_init
procedure :: setup_real_event_kinematics => pi_setup_real_event_kinematics
end type process_instance_t
contains
subroutine process_instance_init (instance)
class(process_instance_t), intent(out), target :: instance
integer :: i
integer :: i_born, i_real
print *, "Process instance init"
allocate (instance%phs)
end subroutine process_instance_init
subroutine pi_setup_real_event_kinematics (process_instance)
class(process_instance_t), intent(inout) :: process_instance
integer :: i_real, i
associate (event_deps => process_instance%event_deps)
i_real = 2
associate (phs => process_instance%phs)
print *, "Type is phs_fks_t"
allocate (phs%phs_identifiers (3))
call phs%phs_identifiers(1)%init ([1])
call phs%phs_identifiers(2)%init ([1,2])
call phs%phs_identifiers(3)%init ([1,2,3])
event_deps%phs_identifiers = phs%phs_identifiers
!!!! Workaround
! allocate (event_deps%phs_identifiers (size (phs%phs_identifiers)))
! do i = 1, size (phs%phs_identifiers)
! event_deps%phs_identifiers(i) = phs%phs_identifiers(i)
! end do
end associate
end associate
end subroutine pi_setup_real_event_kinematics
end module instances
!!!!!
program main
use instances, only: process_instance_t
implicit none
type(process_instance_t), allocatable, target :: process_instance
allocate (process_instance)
call process_instance%init ()
call process_instance%setup_real_event_kinematics ()
end program main
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #38 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 44745
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44745&action=edit
Small reproducer for the second problem
And an 89 line small reproducer for the second problem.
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Subject: [Bug fortran/84674] [7/8/9 Regression] Derived type name change makes a program segfault, removing non_overridable helps
Date: Tue, 25 Sep 2018 13:32:00 -0000
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--- Comment #5 from Libavius <daraja at web dot de> ---
(In reply to Libavius from comment #4)
> There are two ways to get this program to work, which are both quite weird:
> 1. remove "non_overridable" from line 14 in module1.f90
> old: procedure, pass, non_overridable :: get => child_get
> new: procedure, pass :: get => child_get
Sorry for this, I meant line 13:
old: procedure, pass, non_overridable :: reset => child_reset
new: procedure, pass :: reset => child_reset
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #39 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The culprit for the second problem is r264358, exposed only once the original
problem is fixed, i.e. with the patch of r264485 (tested on both reproducers).
It would have been better to open a new PR for it, but it's probably too
late!-(
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Tue, 25 Sep 2018 13:39:00 -0000
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--- Comment #40 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Dominique d'Humieres from comment #39)
> The culprit for the second problem is r264358, exposed only once the
> original problem is fixed, i.e. with the patch of r264485 (tested on both
> reproducers).
>
> It would have been better to open a new PR for it, but it's probably too
> late!-(
Yes, I left this open to Paul. You could still disentangle, you have my
blessings.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 13:43:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That makes me a little uncomfortable. Currently you can use something like:
struct X
{
#ifndef NDEBUG
X(int) noexcept(false);
#endif
//...
};
bool test(std::variant<int, X> const& v)
{
return v.valueless_by_exception();
}
and it "works" (despite the ODR violation), even if the variant was put into a
valueless state in a TU where the throwing constructor was defined and the test
is in a TU where it isn't defined.
The suggested intrinsic would turn this from a "harmless" ODR violation to a
more problematic one.
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It's a different problem than in PR87398.
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Subject: [Bug target/82699] ENDBR isn't generated at function entrance (with -mfentry)
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--- Comment #9 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 25 13:51:45 2018
New Revision: 264569
URL: https://gcc.gnu.org/viewcvs?rev=264569&root=gcc&view=rev
Log:
i386: Compile pr82699-5.c and pr82699-6.c with -fno-pic
Compile pr82699-5.c and pr82699-6.c with -fno-pic to avoid
FAIL: gcc.target/i386/pr82699-5.c (test for excess errors)
Excess errors:
cc1: sorry, unimplemented: -mfentry isn't supported for 32-bit in combination
with -fpic
FAIL: gcc.target/i386/pr82699-6.c (test for excess errors)
Excess errors:
cc1: error: -mnop-mcount is not implemented for -fPIC
cc1: sorry, unimplemented: -mfentry isn't supported for 32-bit in combination
with -fpic
when running GCC testsuite with --target_board='unix{-fpic\ -m32,-fpic}'.
PR target/82699
* gcc.target/i386/pr82699-5.c: Add -fno-pic for ia32.
* gcc.target/i386/pr82699-6.c: Add -fno-pic.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr82699-5.c
trunk/gcc/testsuite/gcc.target/i386/pr82699-6.c
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
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--- Comment #41 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #40)
> (In reply to Dominique d'Humieres from comment #39)
> > The culprit for the second problem is r264358, exposed only once the
> > original problem is fixed, i.e. with the patch of r264485 (tested on both
> > reproducers).
> >
> > It would have been better to open a new PR for it, but it's probably too
> > late!-(
>
> Yes, I left this open to Paul. You could still disentangle, you have my
> blessings.
The problem is caused by my being too brutal in gfc_is_reallocatable_lhs. I
have a patch which is just now regtesting. I will post it here once it is done.
Paul
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Subject: [Bug c++/84707] [8 Regression] internal compiler error: Segmentation fault (tree_check()/duplicate_decls())
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #13 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
there should be no error
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Subject: [Bug fortran/87359] [9 regression] pointer being freed was not allocated
Date: Tue, 25 Sep 2018 14:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #42 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44746
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44746&action=edit
Patch for the PR
Many thanks Juergen for the reduced test. This is now DEJA-GNUified (see
below).
The patch regtests OK. Note that I cannot commit this until next week.
(Thomas or Dominique, are you in a position to do the honours?)
Best regards
Paul
! { dg-do compile }
! { dg-options "-fdump-tree-original" }
!
! Test the fix for the second part of PR87359 in which the reallocation on
! assignment for components of associate names was disallowed by r264358.
! -fcheck-all exposed the mismatch in array shapes.
!
! Contributed by Juergen Reuter <juergen.reuter@desy.de>
!
module phs_fks
implicit none
private
public :: phs_identifier_t
public :: phs_fks_t
type :: phs_identifier_t
integer, dimension(:), allocatable :: contributors
contains
procedure :: init => phs_identifier_init
end type phs_identifier_t
type :: phs_fks_t
type(phs_identifier_t), dimension(:), allocatable :: phs_identifiers
end type phs_fks_t
contains
subroutine phs_identifier_init &
(phs_id, contributors)
class(phs_identifier_t), intent(out) :: phs_id
integer, intent(in), dimension(:) :: contributors
allocate (phs_id%contributors (size (contributors)))
phs_id%contributors = contributors
end subroutine phs_identifier_init
end module phs_fks
!!!!!
module instances
use phs_fks
implicit none
private
public :: process_instance_t
type :: nlo_event_deps_t
type(phs_identifier_t), dimension(:), allocatable :: phs_identifiers
end type nlo_event_deps_t
type :: process_instance_t
type(phs_fks_t), pointer :: phs => null ()
type(nlo_event_deps_t) :: event_deps
contains
procedure :: init => process_instance_init
procedure :: setup_real_event_kinematics => pi_setup_real_event_kinematics
end type process_instance_t
contains
subroutine process_instance_init (instance)
class(process_instance_t), intent(out), target :: instance
integer :: i
integer :: i_born, i_real
print *, "Process instance init"
allocate (instance%phs)
end subroutine process_instance_init
subroutine pi_setup_real_event_kinematics (process_instance)
class(process_instance_t), intent(inout) :: process_instance
integer :: i_real, i
associate (event_deps => process_instance%event_deps)
i_real = 2
associate (phs => process_instance%phs)
print *, "Type is phs_fks_t"
allocate (phs%phs_identifiers (3))
call phs%phs_identifiers(1)%init ([1])
call phs%phs_identifiers(2)%init ([1,2])
call phs%phs_identifiers(3)%init ([1,2,3])
event_deps%phs_identifiers = phs%phs_identifiers ! Error: mismatch
in array shapes.
end associate
end associate
end subroutine pi_setup_real_event_kinematics
end module instances
!!!!!
program main
use instances, only: process_instance_t
implicit none
type(process_instance_t), allocatable, target :: process_instance
allocate (process_instance)
call process_instance%init ()
call process_instance%setup_real_event_kinematics ()
end program main
! { dg-final { scan-tree-dump-times "__builtin_realloc" 2 "original" } }
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Subject: [Bug debug/83941] Debug info generated with -flto contains useless forwarders
Date: Tue, 25 Sep 2018 14:59:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 25 14:51:39 2018
New Revision: 264573
URL: https://gcc.gnu.org/viewcvs?rev=264573&root=gcc&view=rev
Log:
2018-09-25 Richard Biener <rguenther@suse.de>
PR debug/83941
* dwarf2out.c (add_AT_external_die_ref): Remove now redundant
GC-ification.
(maybe_create_die_with_external_ref): Do not create
DW_TAG_imported_unit here.
(add_abstract_origin_attribute): Handle external BLOCK refs.
(dwarf2out_abstract_function): Simplify LTO case.
(dwarf2out_early_finish): Create DW_TAG_imported_unit explicitely
rather than using maybe_create_die_with_external_ref.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 15:02:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Sep 25 14:59:16 2018
New Revision: 264574
URL: https://gcc.gnu.org/viewcvs?rev=264574&root=gcc&view=rev
Log:
PR libstdc++/87431 optimise valueless_by_exception()
If a std::variant can never get into valueless state then we don't need
to do a runtime check for a valid alternative.
PR libstdc++/87431
* include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
Avoid runtime test when all alternatives are scalars and so cannot
throw during initialization.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/variant
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Subject: [Bug fortran/87430] [7/8/9 Regression] ICE in fortran/trans-types.c:1157
Date: Tue, 25 Sep 2018 15:04:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic,
| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
CC| |janus at gcc dot gnu.org
Target Milestone|--- |7.4
Summary|ICE in |[7/8/9 Regression] ICE in
|fortran/trans-types.c:1157 |fortran/trans-types.c:1157
Ever confirmed|0 |1
--- Comment #1 from janus at gcc dot gnu.org ---
Confirmed. Note that this is a regression: gfortran 6.4 says ...
do i=2, size(elements)
1
Error: Symbol ‘i’ at (1) has no IMPLICIT type
... while 7.3 and upwards shows the ICE.
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
Date: Tue, 25 Sep 2018 15:08:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Jakub's patch <https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01445.html> fixes
this, too, so I'll just add the new test.
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Subject: [Bug fortran/87430] [7/8/9 Regression] ICE in fortran/trans-types.c:1157
Date: Tue, 25 Sep 2018 15:16:00 -0000
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--- Comment #2 from janus at gcc dot gnu.org ---
Slightly reduced/modified test case:
subroutine lexical_preprocessing(elements)
implicit none
character(len=10), dimension(:) :: elements
do i=2, size(elements)
associate(el => elements(i))
print *, el(1:2)
end associate
end do
end subroutine
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Subject: [Bug c++/86567] [8/9 Regression] -Wnonnull/-Wformat/-Wrestrict affect code generation
Date: Tue, 25 Sep 2018 15:22:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think the problem is not exactly that maybe_constant_value keeps a lookup
cache, but rather that invoking maybe_constant_value may cause allocation of
uids. So it wouldn't be enough to simply avoid populating the cache in warning
context.
It seems a bit strange to do full-blown constexpr evaluation for warnings,
especially if normal compilation flow wouldn't perform the same evaluation.
Wouldn't it make sense to use some more light-weight lookup for warning
purposes?
On this testcase we allocate a new uid via
allocate_decl_uid ()
make_node (code=RESULT_DECL)
build_decl (loc=13709891, code=RESULT_DECL, name=0x0, type=0x7ffff0d86e70)
start_preparsed_function(tree_node*, tree_node*, int) ()
instantiate_decl(tree_node*, bool, bool) ()
instantiate_cx_fn_r (tp=0x7ffff0d88c98, walk_subtrees=0x7fffffffd528)
walk_tree_1
walk_tree_1
walk_tree_1
walk_tree_without_duplicates_1
instantiate_constexpr_fns (t=0x7ffff0d88ea0)
cxx_eval_outermost_constant_expr
maybe_constant_value (t=0x7ffff0d88ea0, decl=0x0)
build_over_call (cand=0x27a65a0, flags=1, complain=3)
build_new_method_call_1
build_new_method_call
build_special_member_call
expand_aggr_init_1(tree_node*, tree_node*, tree_node*, tree_node*, int, int) ()
emit_mem_initializers(tree_node*) ()
tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ()
tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ()
instantiate_decl(tree_node*, bool, bool) ()
instantiate_pending_templates(int) ()
c_parse_final_cleanups() ()
compile_file() ()
toplev::main(int, char**) ()
main ()
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Subject: [Bug c++/70435] section attribute of a function template is not honored.
Date: Tue, 25 Sep 2018 15:28:00 -0000
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Khalil <kammce at google dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kammce at google dot com
--- Comment #5 from Khalil <kammce at google dot com> ---
Having similiar issues with ARM Embedded and Linux GCC.
Having trouble finding a work around for this.
Here is an example code that demonstrates the issue in our particular use case:
===============================================================
// g++ -std=c++17 static.cpp -o static.exe
//
// objdump -t static.exe | grep thing
// 0000000000000740 u O .rodata 0000000000000064
_ZZ5test0ILi5EEvvE5thing
//
// clang -std=c++14 static.cpp -o static.exe
// objdump -t static.exe | grep thing
// 00000000004005d3 w O .log_entry 0000000000000064
_ZZ5test0ILi5EEvvE5thing
#include <cstdio>
#if __APPLE__
#define PUT_IN_SECTION(name) __attribute__((section("__text," name), used))
#else
#define PUT_IN_SECTION(name) __attribute__((section(name), used))
#endif
struct ThingType
{
constexpr ThingType(const char * str): data{}
{
for(int i = 0; str[i] != '\0' && i < sizeof(data); i++)
{
data[i] = str[i];
}
}
char data[100];
};
template <int dummy_template_parameter = 5>
void test0()
{
PUT_IN_SECTION(".log_entry")
static const ThingType thing("Goodbye!");
printf("Hello, World!\n");
}
int main()
{
test0();
return 0;
}
===============================================================
Comment the test0 template line out, and the entry will appear in the
appropriate section.
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
Date: Tue, 25 Sep 2018 15:29:00 -0000
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--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
My approach was wrong, fundamentally -mslow-flash-data and -mword-relocations
cannot both be in effect since there is then no way to load an address:
- -mslow-flash-data forbids literal pools
- -mword-relocations forbids MOVW/MOVT
I've written a patch to make the two options conflicts. Testing it now.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible
Date: Tue, 25 Sep 2018 16:06:00 -0000
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--- Comment #33 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Arnd Bergmann from comment #32)
> (In reply to Martin Liška from comment #31)
> > (In reply to Arnd Bergmann from comment #30)
> > > (In reply to Martin Liška from comment #29)
> > > > Which is very promising improvement I would say.
> > >
> > > Agreed, this looks great. With most of the warnings against the
> > > 2048 byte limit gone, we can probably work around the remaining
> > > ones by doing local code changes in the kernel. I had patches for
> > > some of these in the past, which I can dig up then.
> >
> > Just out of curiosity. Am I right that you're using KASAN build for
> > syzkaller or an other fuzzer? If so, I bet you can't hit most of the
> > stack overflows in drivers as you very probably don't have the
> > real hardware?
>
> No, I don't do any fuzzing myself. The side project that I'm
> interested in here is to build the kernel in all random
> configurations without compile-time warnings that may indicate
> bugs. I tend to build several hundred such kernels per day to
> catch new bugs in both the (linux-next) kernel and in the
> toolchain (clang and gcc).
Ok, btw. it helped to expose multiple issues in ASAN implementation in GCC. So
then it's useful even though you're then not running the instrumented kernels.
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Subject: [Bug c++/81246] ICE on invalid C++ code (with a non-type template parameter having type 'float'): Segmentation fault
Date: Tue, 25 Sep 2018 16:07:00 -0000
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Sep 25 16:05:48 2018
New Revision: 264577
URL: https://gcc.gnu.org/viewcvs?rev=264577&root=gcc&view=rev
Log:
2018-09-25 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/81246
* g++.dg/cpp0x/pr81246.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr81246.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/81246] ICE on invalid C++ code (with a non-type template parameter having type 'float'): Segmentation fault
Date: Tue, 25 Sep 2018 16:17:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
ICE fixed in 8.1.0.
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From: "willschm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86592] [9 regression] gcc.target/powerpc/p8-vec-xl-xst-v2.c fails starting with r261510
Date: Tue, 25 Sep 2018 16:20:00 -0000
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--- Comment #2 from Will Schmidt <willschm at gcc dot gnu.org> ---
This was fixed via r264538
r264538 | willschm | 2018-09-24 10:47:22 -0500 (Mon, 24 Sep 2018) | 8 lines
[testsuite]
2018-09-24 Will Schmidt <will_schmidt@vnet.ibm.com>
PR testsuite/86952
* gcc.target/powerpc/p8-vec-xl-xst-v2.c: Add and
update expected codegen
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Subject: [Bug middle-end/87433] New: gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c regressions on aarch64
Date: Tue, 25 Sep 2018 16:21:00 -0000
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Bug ID: 87433
Summary: gcc.dg/zero_bits_compound-1.c and
gcc.target/aarch64/ashltidisi.c regressions on aarch64
Product: gcc
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The tests gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c
have been failing since this checkin:
commit 9fa26361aee8ed622921a36dd26d0b0ed0c75641
Author: segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Jul 30 13:18:17 2018 +0000
combine: Allow combining two insns to two insns
This patch allows combine to combine two insns into two. This helps
in many cases, by reducing instruction path length, and also allowing
further combinations to happen. PR85160 is a typical example of code
that it can improve.
This patch does not allow such combinations if either of the original
instructions was a simple move instruction. In those cases combining
the two instructions increases register pressure without improving the
code. With this move test register pressure does no longer increase
noticably as far as I can tell.
(At first I also didn't allow either of the resulting insns to be a
move instruction. But that is actually a very good thing to have, as
should have been obvious).
PR rtl-optimization/85160
* combine.c (is_just_move): New function.
(try_combine): Allow combining two instructions into two if neither of
the original instructions was a move.
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Subject: [Bug c++/84940] [7/8/9 Regression] internal compiler error: in build_value_init_noctor, at cp/init.c:465
Date: Tue, 25 Sep 2018 16:29:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Tue, 25 Sep 2018 16:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87339
--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Tue Sep 25 16:28:40 2018
New Revision: 264579
URL: https://gcc.gnu.org/viewcvs?rev=264579&root=gcc&view=rev
Log:
[PR 87339] Fix failure of gcc.dg/warn-abs-1.c on some targets
2018-09-25 Martin Jambor <mjambor@suse.cz>
PR testsuite/87339
* gcc.dg/warn-abs-1.c: Do not test _Float128. Remove dg-skip-if and
float125 target.
* gcc.target/i386/warn-abs-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/warn-abs-3.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/warn-abs-1.c
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Subject: [Bug fortran/70149] [F08] Character pointer initialization causes ICE
Date: Tue, 25 Sep 2018 16:41:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44747
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44747&action=edit
A fix for the PR
This regtests OK and even fixes the PR :-)
Submitting to the list in a few minutes.
Paul
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Subject: [Bug c++/87398] [9 Regression] g++ ICE on valid code: tree check: expected record_type or union_type or qual_union_type, have array_type in cxx_eval_constant_expression, at cp/constexpr.c:4820
Date: Tue, 25 Sep 2018 16:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87398
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Sep 25 16:40:57 2018
New Revision: 264580
URL: https://gcc.gnu.org/viewcvs?rev=264580&root=gcc&view=rev
Log:
PR c++/87398
* constexpr.c (cxx_eval_constant_expression) <case OBJ_TYPE_REF>: Only
look through COMPONENT_REFs with DECL_FIELD_IS_BASE FIELD_DECLs.
* g++.dg/other/pr87398.C: New test.
* g++.dg/cpp2a/constexpr-virtual10.C: New test.
* g++.dg/cpp2a/constexpr-virtual11.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/constexpr-virtual10.C
trunk/gcc/testsuite/g++.dg/cpp2a/constexpr-virtual11.C
trunk/gcc/testsuite/g++.dg/other/pr87398.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-616285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 16:44:16 2018
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/87434] New: LTO corrupts code
Date: Tue, 25 Sep 2018 16:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87434
Bug ID: 87434
Summary: LTO corrupts code
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: kelvin at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 44748
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44748&action=edit
reproducer source code including draft patch
In the attached sample program, the code generated for the following loop is
corrupted by the lto pass.
for (i = 0; i < N; i++)
{
/* the -flto optimization corrupts the following assignments. */
dst[i] = 0;
src[i] = i;
}
When -flto optimization is enabled, the loop behaves as if it had been written
as shown below, with the source values swapped during assignments to the
respective array slots:
for (i = 0; i < N; i++)
{
dst[i] = i;
src[i] = 0;
}
This problem has only been seen in the context of a draft patch which has the
effect of replacing Power X-form addresses with D-form addresses, also
attached. In this particular test program, the compiler discovers that src is
512 bytes from dst, and uses the same pointer for both assignments, using a
512-byte immediate-mode offset to distinguish the two assignments.
Draft patch and test programs are attached.
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Subject: [Bug c++/87398] [9 Regression] g++ ICE on valid code: tree check: expected record_type or union_type or qual_union_type, have array_type in cxx_eval_constant_expression, at cp/constexpr.c:4820
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
>From gcc-bugs-return-616288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 17:12:18 2018
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Subject: [Bug fortran/70149] [F08] Character pointer initialization causes ICE
Date: Tue, 25 Sep 2018 17:12:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
I had better take it!
>From gcc-bugs-return-616287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 17:07:17 2018
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Subject: [Bug middle-end/87433] gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c regressions on aarch64
Date: Tue, 25 Sep 2018 17:12:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-09-25
CC| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
You'll have to give more information. Most likely it is a testcase problem
(two of-em in fact); the testcase is simply not expecting the new-and-improved
codegen.
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Subject: [Bug fortran/70752] Incorrect LEN for ALLOCATABLE CHARACTER
Date: Tue, 25 Sep 2018 17:17:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
I had better take it :-)
Paul
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Subject: [Bug testsuite/87433] gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c regressions on aarch64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87433
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|middle-end |testsuite
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
gcc.dg/zero_bits_compound-1.c and ashltidisi.c were reported before:
https://gcc.gnu.org/ml/gcc-patches/2018-07/msg01933.html
And were decided they were testsuite issues. See the thread.
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From: "ndesaulniers at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87435] New: "Duplicate const" warning NOT emitted from typedef in -stdÉ0
Date: Tue, 25 Sep 2018 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87435
Bug ID: 87435
Summary: "Duplicate const" warning NOT emitted from typedef in
-std=c90
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Forked from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80868.
Test case: https://godbolt.org/z/jjstcx
typedef const int t;
const t x;
It seems that for -std=c90 (non pedantic, non GNU), GCC does not warn for a
duplicate type specifier. That seems to violate C90 6.5.3 constraints: "The
same type qualifier shall not appear more than once in the same specifier-list
or qualifier-list, either directly or via one or more typedefs."
I found this while trying to match GCC's behavior for warning about duplicate
type qualifiers from `typeof` expressions in Clang:
https://reviews.llvm.org/D52248#1243898
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Subject: [Bug testsuite/87433] [9 Regression] gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c tests fail after combine two to two instruction patch on aarch64
Date: Tue, 25 Sep 2018 17:22:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|gcc.dg/zero_bits_compound-1 |[9 Regression]
|.c and |gcc.dg/zero_bits_compound-1
|gcc.target/aarch64/ashltidi |.c and
|si.c tests fail after |gcc.target/aarch64/ashltidi
|combine two to two |si.c tests fail after
|instruction patch on |combine two to two
|aarch64 |instruction patch on
| |aarch64
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Subject: [Bug c/80868] "Duplicate const" warning emitted in `const typeof(foo) bar;`
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--- Comment #7 from Nick Desaulniers <ndesaulniers at google dot com> ---
Forked: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87435
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Sep 25 18:02:47 2018
New Revision: 264581
URL: https://gcc.gnu.org/viewcvs?rev=264581&root=gcc&view=rev
Log:
PR c++/87425
* g++.dg/cpp2a/constexpr-virtual12.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/constexpr-virtual12.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 18:03:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm going to mark this as fixed, I'm uncomfortable doing a smarter fix that
would be more fragile.
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Subject: [Bug c/87435] "Duplicate const" warning NOT emitted from typedef in -stdÉ0
Date: Tue, 25 Sep 2018 18:06:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>(non pedantic, non GNU)
Yes you need to use -pedantic-errors to get fully complaint compiler errors. I
think this was always designed that way.
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Subject: [Bug c++/87425] [9 Regression] ICE with virtual assignment operator
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Done. Thanks Jakub for fixing this one.
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Subject: [Bug c++/87436] New: G++ produces >300MB .rodata section to initialize struct with big array
Date: Tue, 25 Sep 2018 18:11:00 -0000
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Bug ID: 87436
Summary: G++ produces >300MB .rodata section to initialize
struct with big array
Product: gcc
Version: 5.4.0
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Created attachment 44749
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44749&action=edit
test code
I'm on Linux x86_64, more specifically XUbuntu 16.04, and use GCC version
"Ubuntu 5.4.0-6ubuntu1~16.04.10", so I selected Version 5.4.0
I think this bug still exists in the latest GCC release, but I was only able to
test that on gcc.godbolt.org (there it produces either a timeout or out of
memory error). It also seems like the bug was introduced between 4.9.x and 5.1
Anyway: I have a simple struct with a few fields that are all have default
values, and another struct containing a huge (16mio elements) array of the
aforementioned type (see attachment for test code).
I built it with "g++ -std=c++11 -c -o testsize.o testsize.cpp" - it takes over
a minute to build, cc1plus uses over 4GB of main memory in the process and it
produces a 385MB .o file.
Inspecting that .o shows that the .rodata section is really big, and its
contents are used for the constructor of the struct containing the array - it
just memcpy()s that massive blob of data into the new object..
Now in general this certainly is a clever optimization, but I don't think it's
a good idea if the object is this big.
Furthermore, it even happens with -0s builds and I guess even for saner object
sizes this kind of optimization is not what you'd want in size-optimized
builds?
This might be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82294 -
however I opened a new bug because that report was about C++17 with constexpr,
while my case is C++11.
Godbolt link: https://gcc.godbolt.org/z/Cseqhi
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From: "metalcaedes at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87436] G++ produces >300MB .rodata section to initialize struct with big array
Date: Tue, 25 Sep 2018 18:15:00 -0000
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Daniel Gibson <metalcaedes at gmail dot com> changed:
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--- Comment #1 from Daniel Gibson <metalcaedes at gmail dot com> ---
Created attachment 44750
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44750&action=edit
the .ii file
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From: "george.burgess.iv at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80868] "Duplicate const" warning emitted in `const typeof(foo) bar;`
Date: Tue, 25 Sep 2018 18:35:00 -0000
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George Burgess IV <george.burgess.iv at gmail dot com> changed:
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--- Comment #8 from George Burgess IV <george.burgess.iv at gmail dot com> ---
> George, do you agree with closing this?
Sounds good to me.
Thanks everyone!
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Subject: [Bug c++/85557] Incorrect calculation of function arguments with C++17 sequencing rules
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 78734 ***
>From gcc-bugs-return-616301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 18:35:55 2018
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Subject: [Bug testsuite/87339] [9 Regression] gcc.dg/warn-abs-1.c FAILs
Date: Tue, 25 Sep 2018 18:40:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-616303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 18:40:49 2018
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Subject: [Bug c++/78734] [C++17] P0145R3: function arguments are indeterminately sequenced
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 85557 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-616304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 18:58:55 2018
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 25 Sep 2018 19:01:00 -0000
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--- Comment #6 from Antony Polukhin <antoshkka at gmail dot com> ---
(In reply to Jonathan Wakely from comment #5)
> I'm going to mark this as fixed, I'm uncomfortable doing a smarter fix that
> would be more fragile.
+1. I'll keep searching for a less fragile solution.
>From gcc-bugs-return-616305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 19:01:17 2018
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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/61247] vectorization fails for unsigned is used for IV but casted to int before using as the index (and then casted for internal type)
Date: Tue, 25 Sep 2018 19:23:00 -0000
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--- Comment #4 from Steve Ellcey <sje at gcc dot gnu.org> ---
Here is a simpler C version of the problem.
On aarch64 in LP64 mode setting TYPE
to int, long int, or unsigned long int allows for vectorization
but using unsigned int does not get vectorized.
In ILP32 mode, all types allow the loop to be vectorized.
/* int gets vectorized
long int gets vectorized
unsigned long int gets vectorized
unsigned int does NOT get vectorized in LP64 mode */
typedef unsigned int TYPE;
void f(TYPE N, int *C, int *A, int val)
{
TYPE i,j;
for (i=0; i<N; i++) {
for (j=0; j<N; j++) {
C[i*N+j]=A[i*N+j] * val;
}
}
}
>From gcc-bugs-return-616306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 19:23:18 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86119] [8/9 Regression] Intrinsic len has wrong type if used within select type for a class(*) string
Date: Tue, 25 Sep 2018 20:05:00 -0000
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janus at gcc dot gnu.org changed:
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--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> Likely revision r256284.
Certainly.
For the code in comment 0, -fdump-tree-original shows:
l2 = (integer(kind=4)) s._len;
Apparently the _len component of the class container has kind=8.
The following patch manages to remove the conversion warning:
diff --git a/gcc/fortran/class.c b/gcc/fortran/class.c
index 2eae7f0f351..cbc2c72ae3f 100644
--- a/gcc/fortran/class.c
+++ b/gcc/fortran/class.c
@@ -709,7 +709,7 @@ gfc_build_class_symbol (gfc_typespec *ts, symbol_attribute
*attr,
if (!gfc_add_component (fclass, "_len", &c))
return false;
c->ts.type = BT_INTEGER;
- c->ts.kind = gfc_charlen_int_kind;
+ c->ts.kind = gfc_default_integer_kind;
c->attr.access = ACCESS_PRIVATE;
c->attr.artificial = 1;
}
However, instead of this, we should rather insert an explicit conversion to get
rid of the warning, I think.
>From gcc-bugs-return-616307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 20:05:27 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 20:31:00 -0000
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--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #15)
> Will try on a ppc-darwin8 system at some point.
external weak definitions appear in archive __SYMTABS for cctools 622 on
powerpc-darwin8.11 (maybe some chance to test with darwin7, it would be nice to
have a way to repeat the original problem).
>From gcc-bugs-return-616308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 20:31:32 2018
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87391] [RISCV] -march=rv32i -mabi=ilp32e is erroneously accepted
Date: Tue, 25 Sep 2018 20:34:00 -0000
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--- Comment #5 from Jim Wilson <wilson at gcc dot gnu.org> ---
The proposed psABI change is now
https://github.com/riscv/riscv-elf-psabi-doc/issues/79
>From gcc-bugs-return-616309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 20:34:05 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 20:59:00 -0000
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--- Comment #17 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #16)
> (In reply to Iain Sandoe from comment #15)
>
> > Will try on a ppc-darwin8 system at some point.
>
> external weak definitions appear in archive __SYMTABS for cctools 622 on
> powerpc-darwin8.11 (maybe some chance to test with darwin7, it would be nice
> to have a way to repeat the original problem).
I had a 10.3 boot partition on my old tibook (yeah, 2002 machine still works
quite happily).
So it's confirmed.
powerpc-darwin7 (cctools 525) weak external definitions don't appear in archive
TOCs. So the proposed solution above seems safe to me.
>From gcc-bugs-return-616310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 20:59:47 2018
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Subject: [Bug testsuite/87433] [9 Regression] gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c tests fail after combine two to two instruction patch on aarch64
Date: Tue, 25 Sep 2018 21:06:00 -0000
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--- Comment #3 from Steve Ellcey <sje at gcc dot gnu.org> ---
Based on that email string, gcc.target/aarch64/ashltidisi.c can be
fixed by looking for 3 asr instructions instead of 4. That seems
simple enough. The new code has two fewer instructions that the
old code:
< NEW CODE
> OLD CODE
11,12c11,13
< lsr w1, w0, 11
< lsl x0, x0, 53
---
> uxtw x1, w0
> lsl x0, x1, 53
> lsr x1, x1, 11
24,25c25,27
< sbfx x1, x0, 11, 21
< lsl x0, x0, 53
---
> sxtw x1, w0
> lsl x0, x1, 53
> asr x1, x1, 11
But gcc.dg/zero_bits_compound-1.c is not an aarch64 specific test,
we are seeing 'and' expressions in the rtl on aarch64. Based on the
email string that seems OK. It generates the same number of instructions
as before but there is a some opportunity for doing some of them
in parallel. But the test doesn't seem to be failing on
the x86 or s390 platforms so should we just not run it on aarch64
anymore? That would seem like the right fix to me, I don't think
the test makes sense on aarch64 anymore.
>From gcc-bugs-return-616311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 21:06:22 2018
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Subject: [Bug testsuite/87433] [9 Regression] gcc.dg/zero_bits_compound-1.c and gcc.target/aarch64/ashltidisi.c tests fail after combine two to two instruction patch on aarch64
Date: Tue, 25 Sep 2018 21:44:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I agree with all of that.
>From gcc-bugs-return-616312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 21:44:52 2018
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From: "mrs at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87380] Explicit instantations should use weak symbols on darwin
Date: Tue, 25 Sep 2018 21:55:00 -0000
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--- Comment #18 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> ---
So, didn't you just say that it works on darwin8 and later and is broken on
darwin7? If so, then darwin8.h needs the #define (since it is the first
version where ar has been fixed). ?
>From gcc-bugs-return-616313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 21:56:00 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87390] [x86 32bit only] GCC does not honor FLT_EVAL_METHOD on implicit conversion of integer to floating point
Date: Tue, 25 Sep 2018 22:06:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I believe this is correct for C99 (see the discussions in bug 82071): my
reading of C99 is that conversions of integers to floating point, both
explicit and implicit, produce results that can be represented in the
semantic type. However, in C11 implicit conversions of integers to
floating point can have excess precision, and as GCC produces the same
results with -std=c11 there is still a bug there (a case I missed when
fixing bug 82071: excess precision needs adding for comparisons of
floating-point and integer types in this case).
>From gcc-bugs-return-616314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 22:06:42 2018
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Subject: [Bug c/87392] UBSAN behavior on left-shifting 1 into the sign bit is dependent on C standard
Date: Tue, 25 Sep 2018 22:10:00 -0000
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--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The implementation-definedness of signed left shift in C90, including
shifting into or past the sign bit (as long as the shift count isn't too
large or negative), is stated explicitly in the response to DR#081.
>From gcc-bugs-return-616315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 25 22:10:16 2018
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Subject: [Bug target/86987] ICE in simplify_binary_operation_1, at simplify-rtx.c:3515 on ppc64le
Date: Tue, 25 Sep 2018 22:11:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Sep 25 22:09:38 2018
New Revision: 264584
URL: https://gcc.gnu.org/viewcvs?rev=264584&root=gcc&view=rev
Log:
rs6000: Do not allow out of range immediate in vsplt[bhw] (PR86987)
The original AltiVec manuals had the immediate lane number in the
splat instructions as a 5-bit number, but anything too big has no
defined meaning, and gas will choke on it too. This patch disallows
it in the instruction patterns as well as in the builtins. This
solves PR86987.
PR target/86987
* config/rs6000/altivec.md (altivec_vspltb): Use
const_0_to_15_operand instead of u5bit_cint_operand.
(*altivec_vspltb_internal): Ditto.
(altivec_vspltb_direct): Ditto.
(altivec_vsplth): Use const_0_to_7_operand instead of
u5bit_cint_operand.
(*altivec_vsplth_internal): Ditto.
(altivec_vsplth_direct): Ditto.
(altivec_vspltw): Use const_0_to_3_operand instead of
u5bit_cint_operand.
(*altivec_vspltw_internal): Ditto.
(altivec_vspltw_direct): Ditto.
(altivec_vspltsf): Ditto.
(*altivec_vspltsf_internal): Ditto.
* config/rs6000/rs6000.c (rs6000_expand_binop_builtin): Handle the
various splats with the proper size immediate. Reorder the various
cases by ascending size of immediate, and put all such together.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/altivec.md
trunk/gcc/config/rs6000/rs6000.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87364] Pretty print of enumerator never prints the id, always falls back to C-style cast output
Date: Tue, 25 Sep 2018 22:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87364
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-25
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81932
Ever confirmed|0 |1
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I like the suggested improvement and I'm happy to confirm the request. Just as
a heads up, the last time a change similar to this one was made it caused GDB
to fail to look up non-type template specializations. I don't know if this
change has the same potential but it might be worth checking.
The details of the problem are discussed in GCC bug 81932 and GDB bug
https://sourceware.org/bugzilla/show_bug.cgi?id=22013. There was also a
lengthy discussion of the problem on the gcc list:
https://gcc.gnu.org/ml/gcc/2018-02/msg00009.html
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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem
Date: Tue, 25 Sep 2018 22:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87387
--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Sep 25 22:17:45 2018
New Revision: 264585
URL: https://gcc.gnu.org/viewcvs?rev=264585&root=gcc&view=rev
Log:
PR c/87387
* builtins.c (unterminated_array): Simplify.
* expr.c (string_constant): Handle SSA_NAME. Add more exceptions
where pointer arithmetic is safe.
* gcc.dg/warn-stpcpy-no-nul.c: Drop unnecessary xfails.
* gcc.dg/warn-stplen-no-nul.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c
trunk/gcc/testsuite/gcc.dg/warn-strlen-no-nul.c
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Subject: [Bug target/86987] ICE in simplify_binary_operation_1, at simplify-rtx.c:3515 on ppc64le
Date: Tue, 25 Sep 2018 22:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86987
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Target Milestone|--- |9.0
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed for 9.
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Subject: [Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem
Date: Tue, 25 Sep 2018 22:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87387
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk.
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Subject: [Bug tree-optimization/71625] missing strlen optimization on different array initialization style
Date: Tue, 25 Sep 2018 22:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71625
Steve Ellcey <sje at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |sje at gcc dot gnu.org
--- Comment #21 from Steve Ellcey <sje at gcc dot gnu.org> ---
Maybe this is already known but this patch:
+2018-08-13 Martin Sebor <msebor@redhat.com>
+
+ PR tree-optimization/71625
+ * c-common.c (braced_list_to_string): New function.
+ * c-common.h (braced_list_to_string): Declare it.
+
Caused two regressions on aarch64:
FAIL: gcc.target/aarch64/vclz.c scan-assembler-times clz\\tv[0-9]+.16b,
v[0-9]+.16b 2
FAIL: gcc.target/aarch64/vneg_s.c scan-assembler-times neg\\tv[0-9]+.16b,
v[0-9]+.16b 1
FAIL: gcc.target/aarch64/vneg_s.c scan-assembler-times neg\\tv[0-9]+.8b,
v[0-9]+.8b 1
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