* [Bug c++/71484] Class with implicit public constructor triggers `-Wctor-dtor-privacy`
[not found] <bug-71484-4@http.gcc.gnu.org/bugzilla/>
@ 2019-08-15 15:35 ` redi at gcc dot gnu.org
2021-03-27 21:29 ` e.fokken+gnu at posteo dot de
1 sibling, 0 replies; 2+ messages in thread
From: redi at gcc dot gnu.org @ 2019-08-15 15:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71484
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Kyle J Strand from comment #0)
> A class whose only user-declared methods are `private`, but which *does*
> have an implicit public constructor, can trigger `-Wctor-dtor-privacy`.
>
> See http://stackoverflow.com/q/33157248/1858225 for discussion and sample
> code.
>
> The offending code is copied here for convenience:
>
> struct foo
> {
> private:
> static int test(void) { return 3; };
> };
That's by design, and is the documented behaviour of the warning. Nothing can
ever call that static function.
>From gcc-bugs-return-651419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 15:36:14 2019
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Subject: [Bug c++/71484] Class with implicit public constructor triggers `-Wctor-dtor-privacy`
Date: Thu, 15 Aug 2019 15:36:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Olivier Kannengieser from comment #2)
> In GCC 8.1,
>
> #pragma GCC diagnostic ignored "-Wctor-dtor-privacy",
> does not fully disable the diagnostic message:
>
> ----------> without ignored diagnostic:
>
> test.cpp:2:8: warning: ‘struct S’ only defines private constructors
> and has no friends [-Wctor-dtor-privacy]
> struct S{
> ^
> test.cpp:4:3: note: ‘constexpr S::S(const S&)’ is public, but
> requires an existing ‘struct S’ object
> S(const S&) = default;
>
>
> -----------> with ignored diagnostic:
>
> test.cpp:4:3: note: ‘constexpr S::S(const S&)’ is public, but
> requires an existing ‘struct S’ object
> S(const S&) = default;
That was Bug 90884 and is now fixed.
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Subject: [Bug c++/90884] Option `-Wctor-dtor-privacy' enables warning even for system headers
Date: Thu, 15 Aug 2019 15:37:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Marek, should this be backported to release branches too?
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--- Comment #3 from Matthias Klose <doko at debian dot org> ---
Created attachment 46718
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46718&action=edit
expvar assembler file
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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++/71484] Class with implicit public constructor triggers `-Wctor-dtor-privacy`
Date: Thu, 15 Aug 2019 15:40:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-15
Ever confirmed|0 |1
Severity|minor |normal
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Here's a case where I think the warning is too noisy:
template<typename T>
class trait
{
template<typename U>
static U get();
public:
using type = decltype(get<T>());
};
trait<int> i;
When compiled with -Wctor-dtor-privacy this warns:
tr.cc:2:7: warning: all member functions in class 'trait<T>' are private
[-Wctor-dtor-privacy]
2 | class trait
| ^~~~~
The member function is supposed to be private. It's used by the
typedef-declaration, but only the typedef needs to be public.
The documentation for the warning says "Also warn if there are no non-private
methods, and there's at least one private member function that isn't a
constructor or destructor." I think the warning should be suppressed if those
private member functions are used by a public typedef.
>From gcc-bugs-return-651423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 15:41:38 2019
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Subject: [Bug c++/90884] Option `-Wctor-dtor-privacy' enables warning even for system headers
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> Marek, should this be backported to release branches too?
Ha, I'm just about to backport a few patches to 9.3, so I'll include this one
too.
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me enhance the function.
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-15
CC| |msebor at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Here's a slightly simplified/modified test case showing the
difference in output between an x86_64 native GCC and an hppa2.0w-hp-hpux11.11
cross. Here too compute_objsize fails because it doesn't handle the ARRAY_REF
argument in the assignment a.a[0] = 0.
$ (set -x && cat t.C && gcc -O2 -S -Wall -fdump-tree-dom3=/dev/stdout t.C &&
/build/hppa2.0w-hp-hpux11.11/gcc-svn/gcc/xgcc -B
/build/hppa2.0w-hp-hpux11.11/gcc-svn/gcc -O2 -S -Wall
-fdump-tree-dom3=/dev/stdout t.C)
+ cat t.C
struct A
{
char n, a[0];
A () { a[0] = 0; }
};
void f (struct A*);
void g (void)
{
struct A a;
f (&a);
}
+ /build/gcc-svn/gcc/xgcc -B /build/gcc-svn/gcc -O2 -S -Wall
-fdump-tree-dom3=/dev/stdout t.C
t.C: In function ‘void g()’:
t.C:5:13: warning: array subscript 0 is above array bounds of ‘char [0]’
[-Warray-bounds]
5 | A () { a[0] = 0; }
| ~~~^
;; Function g (_Z1gv, funcdef_no=3, decl_uid=2317, cgraph_uid=4,
symbol_order=3)
;; 1 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2
;; 2 succs { 1 }
g ()
{
struct A a;
<bb 2> [local count: 1073741824]:
a ={v} {CLOBBER};
a.a[0] = 0;
f (&a);
a ={v} {CLOBBER};
return;
}
+ /build/hppa2.0w-hp-hpux11.11/gcc-svn/gcc/xgcc -B
/build/hppa2.0w-hp-hpux11.11/gcc-svn/gcc -O2 -S -Wall
-fdump-tree-dom3=/dev/stdout t.C
;; Function g (_Z1gv, funcdef_no=3, decl_uid=1911, cgraph_uid=4,
symbol_order=3)
;; 1 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2
;; 2 succs { 1 }
g ()
{
struct A a;
<bb 2> [local count: 1073741824]:
MEM[(char *)&a + 1B] = 0;
f (&a);
a ={v} {CLOBBER};
return;
}
In constructor ‘A::A()’,
inlined from ‘void g()’ at t.C:12:12:
t.C:5:15: warning: writing 1 byte into a region of size 0
[-Wstringop-overflow=]
5 | A () { a[0] = 0; }
| ~~~~~^~~
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91459
Bug ID: 91459
Summary: Tail-Call Optimization is not performed when return
value is assumed.
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: mike.k at digitalcarbide dot com
Target Milestone: ---
In situations where a function either returns a specific value or does not
return at all, GCC fails to perform tail call optimizations. This appears to
occur on all GCC versions with -O1, -O2, -O3, and -Os. It occurs with both the
C and C++ front-ends.
Observe:
/* This function is guaranteed to only return the value '1', else it does not
return.
// This is meant to emulate a function such as 'exec'.
*/
extern int function_returns_only_1_or_doesnt_return(int, int);
int foo1(int a, int b) {
const int result = function_returns_only_1_or_doesnt_return(a, b);
if (result == 1) {
return result;
}
else {
__builtin_unreachable();
}
}
int foo2(int a, int b) {
return function_returns_only_1_or_doesnt_return(a, b);
}
This results in the following output for -O3 on x86-64:
foo1(int, int):
push rax
call function_returns_only_1_or_doesnt_return(int, int)
mov eax, 1
pop rdx
ret
foo3(int, int):
jmp function_returns_only_1_or_doesnt_return(int, int)
While the behavior is correct, the tail-call optimization is far more optimal
and preserves the same semantics.
The same behavior occurs with other architectures as well, so it does not
appear to be a back-end issue.
>From gcc-bugs-return-651427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 15:52:16 2019
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Subject: [Bug go/91035] [10 Regression] gotools fails to build on s390x-linux-gnu
Date: Thu, 15 Aug 2019 15:52:00 -0000
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--- Comment #4 from Matthias Klose <doko at debian dot org> ---
looks like .L34 should be referenced instead of of .L37.
>From gcc-bugs-return-651428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 15:53:09 2019
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From: "mike.k at digitalcarbide dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91459] Tail-Call Optimization is not performed when return value is assumed.
Date: Thu, 15 Aug 2019 15:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91459
--- Comment #1 from mike.k at digitalcarbide dot com ---
'foo3' in the assembly output should be 'foo2'. I'd changed the function name
in my test code and did not update the assembly. Apologies.
>From gcc-bugs-return-651429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 15:58:24 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/91307] -flto causes binary to vary
Date: Thu, 15 Aug 2019 15:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91307
--- Comment #9 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am not 100% sure if hashing calle names works safely, since they will all be
something like "static construction" or so, so I guess one can construct two
different translation units that will end up with same hash. But perhaps we
could teach LTO FE to produce those names purely on symbols exported from the
LTO unit since those should be unique and use it everywhere (including the
lto_priv numbers)?
Of course unless we go the route of getting API to the plugin interface to
obtain full symbol name.
>From gcc-bugs-return-651430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 16:08:04 2019
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Subject: [Bug libstdc++/91456] std::function and std::is_invocable_r do not understand guaranteed elision
Date: Thu, 15 Aug 2019 16:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91456
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Aug 15 16:07:27 2019
New Revision: 274542
URL: https://gcc.gnu.org/viewcvs?rev=274542&root=gcc&view=rev
Log:
PR libstdc++/91456 make INVOKE<R> work with uncopyable prvalues
In C++17 a function can return a prvalue of a type that cannot be moved
or copied. The current implementation of std::is_invocable_r uses
std::is_convertible to test the conversion to R required by INVOKE<R>.
That fails for non-copyable prvalues, because std::is_convertible is
defined in terms of std::declval which uses std::add_rvalue_reference.
In C++17 conversion from R to R involves no copies and so is not the
same as conversion from R&& to R.
This commit changes std::is_invocable_r to check the conversion without
using std::is_convertible.
std::function also contains a similar check using std::is_convertible,
which can be fixed by simply reusing std::is_invocable_r (but because
std::is_invocable_r is not defined for C++11 it uses the underlying
std::__is_invocable_impl trait directly).
PR libstdc++/91456
* include/bits/std_function.h (__check_func_return_type): Remove.
(function::_Callable): Use std::__is_invocable_impl instead of
__check_func_return_type.
* include/std/type_traits (__is_invocable_impl): Add another defaulted
template parameter. Define a separate partial specialization for
INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
with a check that models delayed temporary materialization.
* testsuite/20_util/function/91456.cc: New test.
* testsuite/20_util/is_invocable/91456.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/20_util/function/91456.cc
trunk/libstdc++-v3/testsuite/20_util/is_invocable/91456.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/std_function.h
trunk/libstdc++-v3/include/std/type_traits
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Subject: [Bug rtl-optimization/91460] New: gcc -mpreferred-vector-width%6 is slower than -mpreferred-vector-width\x128 for some loops
Date: Thu, 15 Aug 2019 16:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91460
Bug ID: 91460
Summary: gcc -mpreferred-vector-width=256 is slower than
-mpreferred-vector-width=128 for some loops
Product: gcc
Version: 10.0
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CC: hjl.tools at gmail dot com
Target Milestone: ---
1 static inline void pixel_avg( uint8_t *dst, int i_dst_stride,
2 uint8_t *src1, int i_src1_stride,
3 uint8_t *src2, int i_src2_stride,
4 int i_width, int i_height )
5 {
6 for( int y = 0; y < i_height; y++ )
7 {
8 for( int x = 0; x < i_width; x++ )
9 dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
10 dst += i_dst_stride;
11 src1 += i_src1_stride;
12 src2 += i_src2_stride;
13 }
14 }
If above code is in hot loop.
if i_width value is between 16 and 32, -mprefer-vector-width=128 can provide
~6% performance improvement as compared to -mprefer-vector-width=256.
i_width value must be at least 16 to trigger 128 bit vectorization at line 8.
i_width value must be at least 32 to trigger 256 bit vectorization at line 8.
>From gcc-bugs-return-651432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 18:16:14 2019
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Subject: [Bug target/90878] [8/9/10 Regression] integer -> SSE register move isn't generated
Date: Thu, 15 Aug 2019 18:16:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Aug 15 18:15:33 2019
New Revision: 274543
URL: https://gcc.gnu.org/viewcvs?rev=274543&root=gcc&view=rev
Log:
i386: Separate costs of pseudo registers from hard registers
processor_costs has costs of RTL expressions with pseudo registers and
and costs of hard register moves:
1. Costs of RTL expressions are used to generate the most efficient RTL
operations with pseudo registers.
2. Costs of hard register moves are used by register allocator to
decide how to allocate and move hard registers.
Since relative costs of pseudo register load and store versus pseudo
register moves in RTL expressions can be different from relative costs
of hard registers, we should separate costs of RTL expressions with
pseudo registers from costs of hard registers so that register allocator
and RTL expressions can be improved independently.
This patch moves costs of hard register moves to the new hard_register
field and duplicates costs of moves which are also used for costs of RTL
expressions.
PR target/90878
* config/i386/i386.c (inline_memory_move_cost): Use hard_register
for costs of hard register moves.
(ix86_register_move_cost): Likewise.
* config/i386/i386.h (processor_costs): Move costs of hard
register moves to hard_register. Add int_load, int_store,
xmm_move, ymm_move, zmm_move, sse_to_integer, integer_to_sse,
sse_load, sse_store, sse_unaligned_load and sse_unaligned_store
for costs of RTL expressions.
* config/i386/x86-tune-costs.h: Move costs of hard register
moves to hard_register. Duplicate int_load, int_store,
xmm_move, ymm_move, zmm_move, sse_to_integer, integer_to_sse,
sse_load, sse_store for costs of RTL expressions.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/config/i386/x86-tune-costs.h
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Subject: [Bug c++/81429] maybe_unused attribute triggers syntax error when used on first argument to a constructor
Date: Thu, 15 Aug 2019 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81429
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Aug 15 18:31:16 2019
New Revision: 274544
URL: https://gcc.gnu.org/viewcvs?rev=274544&root=gcc&view=rev
Log:
PR c++/81429 - wrong parsing of constructor with C++11 attribute.
* parser.c (cp_parser_constructor_declarator_p): Handle the scenario
when a parameter declaration begins with [[attribute]].
* g++.dg/cpp0x/gen-attrs-68.C: New test.
* g++.dg/cpp0x/gen-attrs-69.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/gen-attrs-68.C
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/gen-attrs-69.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/parser.c
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Subject: [Bug c++/87519] -Wsign-conversion -Wconversion explicit cast fails to silence warning
Date: Thu, 15 Aug 2019 18:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87519
--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Aug 15 18:32:33 2019
New Revision: 274545
URL: https://gcc.gnu.org/viewcvs?rev=274545&root=gcc&view=rev
Log:
PR c++/87519 - bogus warning with -Wsign-conversion.
* typeck.c (cp_build_binary_op): Use same_type_p instead of comparing
the types directly.
* g++.dg/warn/Wsign-conversion-5.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/warn/Wsign-conversion-5.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/typeck.c
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Subject: [Bug c++/90473] gcc does not call function in comma operator for default argument
Date: Thu, 15 Aug 2019 18:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90473
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Aug 15 18:33:43 2019
New Revision: 274546
URL: https://gcc.gnu.org/viewcvs?rev=274546&root=gcc&view=rev
Log:
PR c++/90473 - wrong code with nullptr in default argument.
* call.c (null_ptr_cst_p): Update quote from the standard.
* decl.c (check_default_argument): Don't return nullptr when the arg
has side-effects.
* g++.dg/cpp0x/nullptr42.C: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/nullptr42.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/call.c
branches/gcc-9-branch/gcc/cp/decl.c
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Subject: [Bug c++/90884] Option `-Wctor-dtor-privacy' enables warning even for system headers
Date: Thu, 15 Aug 2019 18:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90884
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Aug 15 18:35:07 2019
New Revision: 274547
URL: https://gcc.gnu.org/viewcvs?rev=274547&root=gcc&view=rev
Log:
PR c++/90884 - stray note with -Wctor-dtor-privacy.
* class.c (maybe_warn_about_overly_private_class): Guard the call to
inform.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/warn/ctor-dtor-privacy-4.C
branches/gcc-9-branch/gcc/testsuite/g++.dg/warn/ctor-dtor-privacy-4.h
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/class.c
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Subject: [Bug c++/81429] maybe_unused attribute triggers syntax error when used on first argument to a constructor
Date: Thu, 15 Aug 2019 18:36:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for 9.3+.
>From gcc-bugs-return-651439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 18:37:24 2019
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Subject: [Bug c++/90473] gcc does not call function in comma operator for default argument
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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> ---
Fixed in 9.3 too.
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Subject: [Bug c++/87519] -Wsign-conversion -Wconversion explicit cast fails to silence warning
Date: Thu, 15 Aug 2019 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87519
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed in 9.3+.
>From gcc-bugs-return-651440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 19:01:21 2019
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Subject: [Bug target/91461] New: Don't turn on X86_TUNE_SSE_TYPELESS_STORES for AVX/AVX512
Date: Thu, 15 Aug 2019 19:01:00 -0000
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Bug ID: 91461
Summary: Don't turn on X86_TUNE_SSE_TYPELESS_STORES for
AVX/AVX512
Product: gcc
Version: 10.0
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Reporter: hjl.tools at gmail dot com
CC: crazylht at gmail dot com, skpgkp2 at gmail dot com
Target Milestone: ---
Target: i386
We have
X86_TUNE_SSE_TYPELESS_STORES: Always movaps/movups for 128bit stores
since movaps/movups one byte shorter than movdaq/movdqu. But it isn't
the case for AVX/AVX512. There is no need to do it for AVX/AVX512.
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Subject: [Bug rtl-optimization/91460] gcc -mpreferred-vector-width%6 is slower than -mpreferred-vector-width\x128 for some loops
Date: Thu, 15 Aug 2019 19:18:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |crazylht at gmail dot com
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This testcase
---
int block[9][9][9];
void foo(int row, int k, int h)
{
/* Variable nrow range from 4 to 9. */
int nrow = ((row - 1)/3 + 1)*3 + 1;
for (int i = nrow; i < 9; i++)
block[k][h][i] = block[k][h][i] - 10;
}
---
Since nrow range from 4 to 9, 256bit vector operation will never be
executed(vector elements always less than 8), so 256bit vector actually
equals no vectorization plus additional branch cost. Even with epilogue
vectorization, 256bit vector still has more overhead. When this is a hot
function, 256bit vector can reduce performance by 6%.
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/91460] gcc -mpreferred-vector-width%6 is slower than -mpreferred-vector-width\x128 for some loops
Date: Thu, 15 Aug 2019 19:35:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i386
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-15
Ever confirmed|0 |1
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
When loop trip count is known, vectorizer won't select 256-bit vector when
266-bit vector can't be used. When loop trip count is unknown, 256-bit
vector can be slower than 128-bit vector, depending on workloads. In
case of SPEC CPU 2017, 128-bit vector is much faster than 256-bit vector
for a couple benchmarks. For most of benchmarks, there are no performance
differences between 128-bit vector and 256-bit vector.
>From gcc-bugs-return-651443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 20:52:16 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91462] New: missing -Warray-bounds writing to an empty flexible array member in a ctor
Date: Thu, 15 Aug 2019 20:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91462
Bug ID: 91462
Summary: missing -Warray-bounds writing to an empty flexible
array member in a ctor
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
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In the test case below, the write to the empty flexible array member in Ax
isn't diagnosed even though the equivalent write in A0 is.
$ cat t.C && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout t.C
struct A0
{
char n, a[0];
A0 () { a[0] = 0; } // -Warray-bounds (good)
};
void f (void*);
void g ()
{
struct A0 a;
f (&a);
}
struct Ax
{
char n, a[];
Ax () { a[0] = 0; } // missing -Warray-bounds
};
void h ()
{
struct Ax a;
f (&a);
}
t.C: In function ‘void g()’:
t.C:5:14: warning: array subscript 0 is above array bounds of ‘char [0]’
[-Warray-bounds]
5 | A0 () { a[0] = 0; }
| ~~~^
;; Function g (_Z1gv, funcdef_no=3, decl_uid=2317, cgraph_uid=4,
symbol_order=3)
g ()
{
struct A0 a;
<bb 2> [local count: 1073741824]:
a ={v} {CLOBBER};
a.a[0] = 0;
f (&a);
a ={v} {CLOBBER};
return;
}
;; Function h (_Z1hv, funcdef_no=7, decl_uid=2362, cgraph_uid=8,
symbol_order=7)
h ()
{
struct Ax a;
<bb 2> [local count: 1073741824]:
a ={v} {CLOBBER};
a.a[0] = 0;
f (&a);
a ={v} {CLOBBER};
return;
}
>From gcc-bugs-return-651444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:04:00 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91462] [8/9/10 Regression] missing -Warray-bounds writing to an empty flexible array member in a ctor
Date: Thu, 15 Aug 2019 21:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Blocks| |56456
Summary|missing -Warray-bounds |[8/9/10 Regression] missing
|writing to an empty |-Warray-bounds writing to
|flexible array member in a |an empty flexible array
|ctor |member in a ctor
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 5 diagnoses both: https://gcc.godbolt.org/z/dW2U6d. Neither Clang nor GCC
diagnoses either.
The regression was introduced in r158058 committed to fix PR
tree-optimization/43270.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
>From gcc-bugs-return-651445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:27:48 2019
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Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
Date: Thu, 15 Aug 2019 21:27:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
--- Comment #6 from kargl at gcc dot gnu.org ---
Patch submitted.
>From gcc-bugs-return-651446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:45:46 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91463] New: missing -Warray-bounds accessing past the end of a statically initialized flexible array member
Date: Thu, 15 Aug 2019 21:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91463
Bug ID: 91463
Summary: missing -Warray-bounds accessing past the end of a
statically initialized flexible array member
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
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The past the end write to the flexible array member in f() is not diagnosed.
DECL_SIZE of the array is null but for variables with a non-empty DECL_INITIAL
the size can be determined from the CONSTRUCTOR, so it should be possible to
detect the out-of-bounds index that way.
$ cat x.c && gcc -O2 -S -Wall -fdump-tree-vrp=/dev/stdout x.c
struct S { int n, a[]; };
struct S s = { 2, { 1, 0 } };
void f (void)
{
s.a[666] = 0; // missing -Warray-bounds
}
;; Function f (f, funcdef_no=0, decl_uid=1912, cgraph_uid=1, symbol_order=1)
;; 1 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2
;; 2 succs { 1 }
Value ranges after VRP:
f ()
{
<bb 2> [local count: 1073741824]:
s.a[666] = 0;
return;
}
;; Function f (f, funcdef_no=0, decl_uid=1912, cgraph_uid=1, symbol_order=1)
;; 1 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2
;; 2 succs { 1 }
Value ranges after VRP:
f ()
{
<bb 2> [local count: 1073741824]:
s.a[666] = 0;
return;
}
>From gcc-bugs-return-651447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:46:16 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91463] missing -Warray-bounds accessing past the end of a statically initialized flexible array member
Date: Thu, 15 Aug 2019 21:46:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Blocks| |56456
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This bug was never detected by GCC or other compilers (Clang or ICC).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
>From gcc-bugs-return-651448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:49:53 2019
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91464] New: C++ extern "C" namespace A {int value;}; is definition not declaration
Date: Thu, 15 Aug 2019 21:49:00 -0000
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Bug ID: 91464
Summary: C++ extern "C" namespace A {int value;}; is definition
not declaration
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
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CC: jakub at gcc dot gnu.org, jason at gcc dot gnu.org
Target Milestone: ---
From Twitter
extern "C" namespace A
{
int value;
}
int getValue ()
{
return A::value;
}
Clang compiles correctly this first scenario:
https://godbolt.org/z/FjUGov
while GCC doesn't compile:
https://godbolt.org/z/Ohfsgi
Clang compiles correctly this 2nd scenario:
https://godbolt.org/z/LhzeOo
while GCC compiles it wrongly:
https://godbolt.org/z/Nsiy5_
>From gcc-bugs-return-651450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 21:55:58 2019
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Subject: [Bug c++/64372] [DR1560] Gratuitous lvalue-to-rvalue conversion in conditional-expression with throw-expression operand
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64372
--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Aug 15 21:55:19 2019
New Revision: 274550
URL: https://gcc.gnu.org/viewcvs?rev=274550&root=gcc&view=rev
Log:
PR c++/90393 - ICE with thow in ?:
My previous patch for 64372 was incomplete: it only stopped making the
non-throw argument into an rvalue, lvalue_kind still considered the ?:
expression to be an rvalue, leaving us worse than before.
PR c++/64372, DR 1560 - Gratuitous lvalue-to-rvalue conversion in ?:
* tree.c (lvalue_kind): Handle throw in one arm.
* typeck.c (rationalize_conditional_expr): Likewise.
(cp_build_modify_expr): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/expr/cond15.C
trunk/gcc/testsuite/g++.dg/expr/cond16.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/g++.dg/abi/mangle53.C
trunk/gcc/testsuite/g++.old-deja/g++.eh/cond1.C
trunk/gcc/testsuite/g++.old-deja/g++.other/cond5.C
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Subject: [Bug c++/90393] [9/10 Regression] ICE in return statement with a conditional operator, one of the second and third arguments is throw, and the other is a const variable of a class with a nontrivial copy constructor.
Date: Thu, 15 Aug 2019 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90393
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Aug 15 21:55:19 2019
New Revision: 274550
URL: https://gcc.gnu.org/viewcvs?rev=274550&root=gcc&view=rev
Log:
PR c++/90393 - ICE with thow in ?:
My previous patch for 64372 was incomplete: it only stopped making the
non-throw argument into an rvalue, lvalue_kind still considered the ?:
expression to be an rvalue, leaving us worse than before.
PR c++/64372, DR 1560 - Gratuitous lvalue-to-rvalue conversion in ?:
* tree.c (lvalue_kind): Handle throw in one arm.
* typeck.c (rationalize_conditional_expr): Likewise.
(cp_build_modify_expr): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/expr/cond15.C
trunk/gcc/testsuite/g++.dg/expr/cond16.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/g++.dg/abi/mangle53.C
trunk/gcc/testsuite/g++.old-deja/g++.eh/cond1.C
trunk/gcc/testsuite/g++.old-deja/g++.other/cond5.C
>From gcc-bugs-return-651451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 22:16:17 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91464] C++ extern "C" namespace A {int value;}; is definition not declaration
Date: Thu, 15 Aug 2019 22:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91464
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-15
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The "2nd scenario" is:
extern "C" namespace A
{
int value;
}
int getValue ()
{
return A::value;
}
G++ only declares A::value, it doesn't define it.
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Subject: [Bug fortran/91443] -Wargument-mismatch does not catch mismatch for global procedure
Date: Thu, 15 Aug 2019 22:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91443
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Aug 15 22:52:40 2019
New Revision: 274551
URL: https://gcc.gnu.org/viewcvs?rev=274551&root=gcc&view=rev
Log:
2019-08-15 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/91443
* frontend-passes.c (check_externals_expr): New function.
(check_externals_code): New function.
(gfc_check_externals): New function.
* gfortran.h (debug): Add prototypes for gfc_symbol * and
gfc_expr *.
(gfc_check_externals): Add prototype.
* interface.c (compare_actual_formal): Do not complain about
alternate returns if the formal argument is optional.
(gfc_procedure_use): Handle cases when an error has been issued
previously. Break long line.
* parse.c (gfc_parse_file): Call gfc_check_externals for all
external procedures.
* resolve.c (resolve_global_procedure): Remove checking of
argument list.
2019-08-15 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/91443
* gfortran.dg/argument_checking_19.f90: New test.
* gfortran.dg/altreturn_10.f90: Change dg-warning to dg-error.
* gfortran.dg/dec_union_11.f90: Add -std=legacy.
* gfortran.dg/hollerith8.f90: Likewise. Remove warning for
Hollerith constant.
* gfortran.dg/integer_exponentiation_2.f90: New subroutine gee_i8;
use it to avoid type mismatches.
* gfortran.dg/pr41011.f: Add -std=legacy.
* gfortran.dg/whole_file_1.f90: Change warnings to errors.
* gfortran.dg/whole_file_2.f90: Likewise.
Added:
trunk/gcc/testsuite/gfortran.dg/argument_checking_19.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/interface.c
trunk/gcc/fortran/parse.c
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/altreturn_10.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_11.f90
trunk/gcc/testsuite/gfortran.dg/hollerith8.f90
trunk/gcc/testsuite/gfortran.dg/integer_exponentiation_2.f90
trunk/gcc/testsuite/gfortran.dg/pr41011.f
trunk/gcc/testsuite/gfortran.dg/whole_file_1.f90
trunk/gcc/testsuite/gfortran.dg/whole_file_2.f90
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From: "cuzdav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91465] New: unexpected expression of kind overload (ICE)
Date: Thu, 15 Aug 2019 23:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91465
Bug ID: 91465
Summary: unexpected expression of kind overload (ICE)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
This code results in an ICE:
In member function 'Destination Bar<T>::baz(Source)':
internal compiler error: unexpected expression 'foo' of kind overload
return Destination{foo(aLowValue)};
^
// See it LIVE! https://godbolt.org/z/42c_Ll
enum class Destination {};
enum class Source {};
Destination foo(Source value) { return Destination{}; }
Destination foo(double value) { return Destination{}; }
template <typename T>
struct Bar {
Destination baz(Source aLowValue) {
return Destination{foo(aLowValue)}; // <<<< HERE
}
};
Bug appears in 9.1 in c++17 (and up) in all higher g++ versions as well. OK if
c++14 or lower, and OK if older g++.
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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++/91465] [9/10 Regression] unexpected expression of kind overload (ICE)
Date: Thu, 15 Aug 2019 23:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91465
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Keywords| |ice-on-valid-code
Last reconfirmed| |2019-08-15
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
Summary|unexpected expression of |[9/10 Regression]
|kind overload (ICE) |unexpected expression of
| |kind overload (ICE)
Target Milestone|--- |9.3
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r268321 thus mine.
>From gcc-bugs-return-651455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 23:39:56 2019
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From: "frederik.engels24 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91466] New: [concepts] indicates "used in its own initializer" when not, constraint order change passes compilation.
Date: Thu, 15 Aug 2019 23:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91466
Bug ID: 91466
Summary: [concepts] indicates "used in its own initializer"
when not, constraint order change passes compilation.
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: frederik.engels24 at gmail dot com
Target Milestone: ---
Run using "g++ (Compiler-Explorer-Build) 10.0.0 20190814 (experimental)" with
options "-std=c++2a -fconcepts"
and source code: https://godbolt.org/z/aGw2d0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
#include <type_traits>
#include <array>
template<typename T>
concept integral_constant_ = std::is_empty_v<T> && std::is_trivial_v<T> &&
requires
{
typename T::value_type;
requires std::is_integral_v<typename T::value_type>;
{ T::value } -> typename T::value_type;
};
struct sz_fn
{
template<typename R> requires requires(R&& r) { {static_cast<R&&>(r).size()} ->
integral_constant_; }
constexpr auto operator()(R&& r) {
return static_cast<R&&>(r).size();
}
};
constexpr auto sz = sz_fn{};
int main()
{
auto arr = std::array<int, 5>{1, 2, 3, 4, 5};
return !std::is_invocable_v<decltype(sz), decltype(arr)>;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
results in:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from <source>:1:
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits: In
substitution of 'template<class _Fn, class ... _Args> static
std::__result_of_success<decltype (declval<_Fn>()((declval<_Args>)()...)),
std::__invoke_other> std::__result_of_other_impl::_S_test(int) [with _Fn =
const sz_fn; _Args = {std::array<int, 5>}]':
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:2563:55:
required from 'struct std::__result_of_impl<false, false, const sz_fn,
std::array<int, 5> >'
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:2976:12:
recursively required by substitution of 'template<class _Result, class _Ret>
struct std::__is_invocable_impl<_Result, _Ret, std::__void_t<typename
_CTp::type> > [with _Result = std::__invoke_result<const sz_fn, std::array<int,
5> >; _Ret = void]'
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:2976:12:
required from 'struct std::is_invocable<const sz_fn, std::array<int, 5> >'
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:3021:27:
required from 'constexpr const bool std::is_invocable_v<const sz_fn,
std::array<int, 5> >'
<source>:28:18: required from here
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:2552:26:
error: the value of 'std::is_empty_v<integral_constant_>' is not usable in a
constant expression
2552 | std::declval<_Fn>()(std::declval<_Args>()...)
| ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:3103:25:
note: 'std::is_empty_v<integral_constant_>' used in its own initializer
3103 | inline constexpr bool is_empty_v = is_empty<_Tp>::value;
| ^~~~~~~~~~
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:2552:26:
error: the value of 'std::is_trivial_v<integral_constant_>' is not usable in a
constant expression
2552 | std::declval<_Fn>()(std::declval<_Args>()...)
| ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-trunk-20190815/include/c++/10.0.0/type_traits:3092:25:
note: 'std::is_trivial_v<integral_constant_>' used in its own initializer
3092 | inline constexpr bool is_trivial_v = is_trivial<_Tp>::value;
| ^~~~~~~~~~~~
Compiler returned: 1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Changing
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
template<typename T>
concept integral_constant_ = std::is_empty_v<T> && std::is_trivial_v<T> &&
requires
{
typename T::value_type;
requires std::is_integral_v<typename T::value_type>;
{ T::value } -> typename T::value_type;
};
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
to
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
template<typename T>
concept integral_constant_ =
requires
{
typename T::value_type;
requires std::is_integral_v<typename T::value_type>;
{ T::value } -> typename T::value_type;
} && std::is_empty_v<T> && std::is_trivial_v<T>;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allows the program to compile successfully.
>From gcc-bugs-return-651456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 23:46:08 2019
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Subject: [Bug c++/89179] compiler error: in ggc_set_mark, at ggc-page.c:1532
Date: Thu, 15 Aug 2019 23:46:00 -0000
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Steve Ellcey <sje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sje at gcc dot gnu.org
--- Comment #14 from Steve Ellcey <sje at gcc dot gnu.org> ---
I think I may be seeing this same bug on aarch64 when building the RAJA library
based on where I am dying in ggc_set_mark. I have not been able to create a
preprocessed test case because when I compile the preprocessed sources the bug
does not happen. Here is my segfault dump:
min.cpp:191:1: internal compiler error: Segmentation fault
191 | }
| ^
0xf03b5f crash_signal
../../gcc/gcc/toplev.c:326
0x9cc86c lookup_page_table_entry
../../gcc/gcc/ggc-page.c:632
0x9cc86c ggc_set_mark(void const*)
../../gcc/gcc/ggc-page.c:1531
0xc6fe47 gt_ggc_mx_symtab_node(void*)
/home/sellcey/gcc-raja/obj-gcc/gcc/gtype-desc.c:1302
0xe17503 gt_ggc_ma_order
./gt-passes.h:31
0xbe44f3 ggc_mark_root_tab
../../gcc/gcc/ggc-common.c:77
0xbe4813 ggc_mark_roots()
../../gcc/gcc/ggc-common.c:94
0x9cd1fb ggc_collect()
../../gcc/gcc/ggc-page.c:2201
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.
When I look at gt_ggc_mx_symtab_node, the initial x_p pointer
that comes in is reasonable (0xffffa020c210) but after
xlimit = ((*xlimit).next);
The value of xlimit becomes 0xa5a5a5a5a5a5a5a5. That looks
like a bogus value something might have put into memory
to poison it but I didn't see that specific string in
the GCC source tree anywhere.
>From gcc-bugs-return-651457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 15 23:57:25 2019
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From: "frederik.engels24 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91467] New: [concepts] ICE: in tsubst_copy, at cp/pt.c:15545
Date: Thu, 15 Aug 2019 23:57:00 -0000
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Bug ID: 91467
Summary: [concepts] ICE: in tsubst_copy, at cp/pt.c:15545
Product: gcc
Version: 10.0
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Run with "g++ (Compiler-Explorer-Build) 10.0.0 20190814 (experimental)"
and options "-std=c++2a -fconcepts"
source code: https://godbolt.org/z/tOIbPZ
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
template<typename T>
struct foo {
T t;
template<typename U>
void set(U&& u) requires requires { { static_cast<U&&>(u)} -> T; }
{
t = static_cast<U&&>(u);
}
};
int main()
{
auto w = foo<int>{5};
w.set(5.0f);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
resulting in
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>: In function 'int main()':
<source>:15:15: internal compiler error: in tsubst_copy, at cp/pt.c:15545
15 | w.set(5.0f);
| ^
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-651458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 00:17:09 2019
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Subject: [Bug c++/89179] compiler error: in ggc_set_mark, at ggc-page.c:1532
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #15 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Those 0xa5 come from poison_pages in ggc-page.c, this call in particular:
memset (object, 0xa5, size);
>From gcc-bugs-return-651459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 00:33:52 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Fri, 16 Aug 2019 00:33:00 -0000
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--- Comment #4 from dave.anglin at bell dot net ---
If DSE bug can't be fixed, the attached patch appears to work around the issue
by disabling
tail calls on pa when an argument is passed on stack.
>From gcc-bugs-return-651460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 01:36:59 2019
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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/91088] IPA-cp cost evaluation is too conservative for "if (f(param) cmp const_val)" condition
Date: Fri, 16 Aug 2019 01:36:00 -0000
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--- Comment #3 from Feng Xue <fxue at os dot amperecomputing.com> ---
I've already created a patch under review. Please give some comments. Here it
is: https://gcc.gnu.org/ml/gcc-patches/2019-07/msg00959.html
>From gcc-bugs-return-651461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 01:38:18 2019
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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/91089] IPA-cp does not setup proper cost model for switch default case in function versioning
Date: Fri, 16 Aug 2019 01:38:00 -0000
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--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> ---
I've already created a patch under review. Please give some comments. Here it
is: https://gcc.gnu.org/ml/gcc-patches/2019-07/msg00937.html
>From gcc-bugs-return-651462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 02:50:50 2019
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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/91468] New: Suspicious codes in ipa-prop.c and ipa-cp.c
Date: Fri, 16 Aug 2019 02:50:00 -0000
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Bug ID: 91468
Summary: Suspicious codes in ipa-prop.c and ipa-cp.c
Product: gcc
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Some might be a bug, and some might be redundant.
ipa-prop.c:
In function ipcp_modif_dom_walker::before_dom_children(),
vce = false;
t = rhs;
while (handled_component_p (t))
{
/* V_C_E can do things like convert an array of integers to one
bigger integer and similar things we do not handle below. */
if (TREE_CODE (rhs) == VIEW_CONVERT_EXPR)
{
vce = true;
break;
}
t = TREE_OPERAND (t, 0);
}
if (vce)
continue;
Should "rhs" in "if (TREE_CODE (rhs) == VIEW_CONVERT_EXPR)" be "t"?
In function update_jump_functions_after_inlining(),
if (dst->type == IPA_JF_ANCESTOR)
{
......
if (src->type == IPA_JF_PASS_THROUGH
&& src->value.pass_through.operation == NOP_EXPR)
{
......
}
else if (src->type == IPA_JF_PASS_THROUGH
&& TREE_CODE_CLASS (src->value.pass_through.operation) ==
tcc_unary)
{
dst->value.ancestor.formal_id =
src->value.pass_through.formal_id;
dst->value.ancestor.agg_preserved = false;
}
......
}
If we suppose pass_through operation is "negate_expr" (while it is not a
reasonable operation on pointer type), the code might be incorrect. It's better
to specify expected unary operations here.
In function compute_complex_assign_jump_func(),
case GIMPLE_UNARY_RHS:
if (is_gimple_assign (stmt)
&& gimple_assign_rhs_class (stmt) == GIMPLE_UNARY_RHS
&& ! CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt)))
ipa_set_jf_unary_pass_through (jfunc, index,
gimple_assign_rhs_code (stmt));
The condition "is_gimple_assign (stmt)
&& gimple_assign_rhs_class (stmt) == GIMPLE_UNARY_RHS" seems to
be redundant, might be omit.
ipa-cp.c:
In function merge_agg_lats_step(),
if (**aglat && (**aglat)->offset == offset)
{
if ((**aglat)->size != val_size
|| ((**aglat)->next
&& (**aglat)->next->offset < offset + val_size))
{
set_agg_lats_to_bottom (dest_plats);
return false;
}
gcc_checking_assert (!(**aglat)->next
|| (**aglat)->next->offset >= offset + val_size);
return true;
}
The condition "|| ((**aglat)->next && (**aglat)->next->offset < offset +
val_size))" seems to be always false, because the next item should not be
overlapped with its prev, this is what merge_agg_lats_step() tries to ensure.
>From gcc-bugs-return-651463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 05:07:09 2019
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Subject: [Bug go/91035] [10 Regression] gotools fails to build on s390x-linux-gnu
Date: Fri, 16 Aug 2019 05:07:00 -0000
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--- Comment #5 from Ian Lance Taylor <ian at airs dot com> ---
It's hard to see how this could be a bug in the Go frontend. At first glance
this looks like a problem with the split-stack support on S/390.
>From gcc-bugs-return-651464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 06:35:14 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Fri, 16 Aug 2019 06:35:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-16
Ever confirmed|0 |1
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Let me have a quick look.
>From gcc-bugs-return-651465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:30:59 2019
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Subject: [Bug ipa/91468] Suspicious codes in ipa-prop.c and ipa-cp.c
Date: Fri, 16 Aug 2019 07:30:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-16
CC| |jamborm at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-651466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:36:32 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/91469] New: [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 07:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91469
Bug ID: 91469
Summary: [10 Regression] ICE in extract_insn, at recog.c:2310
since r274481
Product: gcc
Version: 10.0
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: rguenth at gcc dot gnu.org, uros at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Yet another fallout from the the patch:
$ cat ice.i
int a, b, e;
long long c;
int d[6];
void fn1() {
int i;
unsigned f;
c = a;
f = i;
for (; i < b; i++)
if (d[i] > f)
f = d[i];
e = f;
}
$ gcc ice.i -funroll-loops -O2 -fno-gcse -m32 -mavx512vbmi -fno-ivopts
ice.i: In function ‘fn1’:
ice.i:14:1: error: unrecognizable insn:
14 | }
| ^
(insn 72 69 14 3 (set (reg:SI 115)
(mem:SI (plus:SI (mult:SI (subreg:V4SI (reg:SI 114) 0)
(const_int 4 [0x4]))
(symbol_ref:SI ("d") [flags 0x2] <var_decl 0x7f9229914cf0 d>))
[1 d S4 A32])) -1
(nil))
during RTL pass: subreg3
ice.i:14:1: internal compiler error: in extract_insn, at recog.c:2310
0x6bab09 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:108
0x6bab25 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:116
0x6b8cad extract_insn(rtx_insn*)
/home/marxin/Programming/gcc/gcc/recog.c:2310
0x16d1af7 decompose_multiword_subregs
/home/marxin/Programming/gcc/gcc/lower-subreg.c:1540
0x16d2c2d execute
/home/marxin/Programming/gcc/gcc/lower-subreg.c:1808
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-651467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:36:43 2019
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-16
Known to work| |9.1.0
Target Milestone|--- |10.0
Ever confirmed|0 |1
Known to fail| |10.0
>From gcc-bugs-return-651468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:37:03 2019
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Subject: [Bug testsuite/91458] FAIL: g++.dg/tree-ssa/pr19807.C -std=gnu++98 scan-tree-dump-times optimized "&MEM\\\\[\\\\(void .\\\\)&a \\\\+ 8B\\\\]" 3
Date: Fri, 16 Aug 2019 07:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Component|tree-optimization |testsuite
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Martin changed the dumping
>From gcc-bugs-return-651469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:42:16 2019
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Subject: [Bug tree-optimization/91459] Tail-Call Optimization is not performed when return value is assumed.
Date: Fri, 16 Aug 2019 07:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-16
Component|middle-end |tree-optimization
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this has a duplicate somewhere. The reason is we end up with
foo1 (int a, int b)
{
<bb 2> [local count: 1073741824]:
function_returns_only_1_or_doesnt_return (a_2(D), b_3(D));
return 1;
and thus no obvious tail-call opportunity. Here it is EVRP replacing
result_5 with 1 in
<bb 2> :
result_5 = function_returns_only_1_or_doesnt_return (a_2(D), b_3(D));
if (result_5 == 1)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
<bb 3> :
// predicted unlikely by early return (on trees) predictor.
return result_5;
<bb 4> :
__builtin_unreachable ();
where it would be better to transform this idiom to unconditional
return result_5 early.
>From gcc-bugs-return-651470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 07:44:17 2019
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Subject: [Bug tree-optimization/91460] gcc -mpreferred-vector-width%6 is slower than -mpreferred-vector-width\x128 for some loops
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|i386 |x86_64-*-*, i?86-*-*,
| |aarch64-*-*
CC| |andre.simoesdiasvieira@arm.
| |com
Component|rtl-optimization |tree-optimization
Blocks| |53947
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I believe we have a duplicate PR for exactly this case and Andre is working on
this.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/91462] [8/9/10 Regression] missing -Warray-bounds writing to an empty flexible array member in a ctor
Date: Fri, 16 Aug 2019 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |8.4
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 07:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91469
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
And one similar issue:
$ cat ice2.i
int a, b, c, d;
int *e;
void fn1() {
b = c > 0 ? c : 0;
d += e[b];
a = d > 0 ? d : 0;
}
$ gcc -Os -m32 --param scev-max-expr-size=0 -mavx512vnni -funroll-all-loops
ice2.i -c
during RTL pass: ira
ice2.i: In function ‘fn1’:
ice2.i:7:1: internal compiler error: in elimination_costs_in_insn, at
reload1.c:3547
7 | }
| ^
0x6ba890 elimination_costs_in_insn
/home/marxin/Programming/gcc/gcc/reload1.c:3547
0xd4228d calculate_elim_costs_all_insns()
/home/marxin/Programming/gcc/gcc/reload1.c:1609
0xbe715d ira_costs()
/home/marxin/Programming/gcc/gcc/ira-costs.c:2305
0xbe0879 ira_build()
/home/marxin/Programming/gcc/gcc/ira-build.c:3432
0xbd7807 ira
/home/marxin/Programming/gcc/gcc/ira.c:5352
0xbd7807 execute
/home/marxin/Programming/gcc/gcc/ira.c:5663
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/91463] missing -Warray-bounds accessing past the end of a statically initialized flexible array member
Date: Fri, 16 Aug 2019 07:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91463
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|middle-end |c
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I believe the frontend should emit warnings for this kind of statically
determinable cases, VRP only runs at -O2+. It should be possible to
split out code like maybe_warn_array_bound (tree expr, bool addr_p, void
(*get_value_range) (tree name, wide_int &min, wide_int &max)) and use
that from the FE with a NULL get_value_range callback.
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
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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 target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 08:04:00 -0000
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
STV converts the register in address:
(insn 14 56 15 3 (parallel [
(set (reg/v:SI 90 [ f ])
(umax:SI (reg/v:SI 92 [ _23 ])
(mem:SI (plus:SI (mult:SI (reg/v:SI 92 [ _23 ])
(const_int 4 [0x4]))
(symbol_ref:SI ("d") [flags 0x2] <var_decl
0x7f4bf0fcbcf0 d>)) [1 d S4 A32])))
(clobber (reg:CC 17 flags))
]) 973 {*umaxsi3_1}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
which is certainly wrong.
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Subject: [Bug ipa/91447] [10 Regression] FAIL: g++.dg/ipa/ipa-icf-4.C -std=gnu++98 scan-ipa-dump icf
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Aug 16 08:10:55 2019
New Revision: 274562
URL: https://gcc.gnu.org/viewcvs?rev=274562&root=gcc&view=rev
Log:
Add missed to a opt-info dump.
2019-08-16 Martin Liska <mliska@suse.cz>
PR ipa/91447
* g++.dg/ipa/ipa-icf-4.C: Add -missed for target that
don't have aliases.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ipa/ipa-icf-4.C
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #3)
> STV converts the register in address:
>
> (insn 14 56 15 3 (parallel [
> (set (reg/v:SI 90 [ f ])
> (umax:SI (reg/v:SI 92 [ _23 ])
> (mem:SI (plus:SI (mult:SI (reg/v:SI 92 [ _23 ])
> (const_int 4 [0x4]))
> (symbol_ref:SI ("d") [flags 0x2] <var_decl
> 0x7f4bf0fcbcf0 d>)) [1 d S4 A32])))
> (clobber (reg:CC 17 flags))
> ]) 973 {*umaxsi3_1}
> (expr_list:REG_UNUSED (reg:CC 17 flags)
> (nil)))
>
> which is certainly wrong.
Yes, it does that via general_scalar_chain::make_vector_copies when replacing
all uses:
for (ref = DF_REG_USE_CHAIN (regno); ref; ref = DF_REF_NEXT_REG (ref))
if (bitmap_bit_p (insns, DF_REF_INSN_UID (ref)))
{
rtx_insn *insn = DF_REF_INSN (ref);
replace_with_subreg_in_insn (insn, reg, vreg);
if (dump_file)
fprintf (dump_file, " Replaced r%d with r%d in insn %d\n",
regno, REGNO (vreg), INSN_UID (insn));
}
I think we need to disqualify this instruction from being STVed because
of the address-use of the reg. I've seen code to do that that probably
needs extending to cover {U,S}{MIN,MAX}. Looking.
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Subject: [Bug ipa/91447] [10 Regression] FAIL: g++.dg/ipa/ipa-icf-4.C -std=gnu++98 scan-ipa-dump icf
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed now.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 08:18:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Index: gcc/config/i386/i386-features.c
===================================================================
--- gcc/config/i386/i386-features.c (revision 274536)
+++ gcc/config/i386/i386-features.c (working copy)
@@ -613,6 +613,10 @@ general_scalar_chain::replace_with_subre
if (x == reg)
return gen_rtx_SUBREG (vmode, new_reg, 0);
+ /* But not in memory addresses. */
+ if (GET_CODE (x) == MEM)
+ return x;
+
const char *fmt = GET_RTX_FORMAT (GET_CODE (x));
int i, j;
for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
fixes this, but then the replacement has higher cost in the end(?).
>From gcc-bugs-return-651480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 08:19:15 2019
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 08:19:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The result is correct at least, so testing this patch.
(insn 72 69 14 3 (set (reg:SI 115)
(mem:SI (plus:SI (mult:SI (reg/v:SI 92 [ _23 ])
(const_int 4 [0x4]))
(symbol_ref:SI ("d") [flags 0x2] <var_decl 0x7f0a63be1cf0 d>))
[1 d S4 A32])) -1
(nil))
(insn 14 72 15 3 (set (subreg:V4SI (reg/v:SI 90 [ f ]) 0)
(umax:V4SI (subreg:V4SI (reg:SI 114) 0)
(subreg:V4SI (reg:SI 115) 0))) 3665 {*sse4_1_umaxv4si3}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 08:28:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Elsewhere we have sth with similar effect, but only disqualifying toplevel MEM.
if (!MEM_P (src))
{
replace_with_subreg_in_insn (insn, reg, reg);
bitmap_clear_bit (conv, INSN_UID (insn));
}
and
if (!MEM_P (dst) || !REG_P (src))
replace_with_subreg_in_insn (insn, reg, reg);
in the end it might be an ordering issue of splitting out memory operands
and converting regs (convert_registers vs. convert_insn).
>From gcc-bugs-return-651482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 08:33:27 2019
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Subject: [Bug tree-optimization/91459] Tail-Call Optimization is not performed when return value is assumed.
Date: Fri, 16 Aug 2019 08:33:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Part of that might be because of:
// predicted unlikely by early return (on trees) predictor.
That seems not true, the other side is more unlikely ...
>From gcc-bugs-return-651483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 08:52:42 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/87880] [9 regression] All macOS asan execution tests FAIL
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Summary|[9/10 regression] All macOS |[9 regression] All macOS
|asan execution tests FAIL |asan execution tests FAIL
--- Comment #14 from Iain Sandoe <iains at gcc dot gnu.org> ---
fixed on trunk.
NOTE: on earlier Darwin platforms (10.7-10.15) it is highly recommended to
build llvm-symbolizer and then:
export ASAN_SYMBOLIZER_PATH=/path/to/llvm-symbolizer
This is because the "atos" implementation for these versions does not seem to
be 100% compatible with the newer sanitisers - the effect is extremely long
timeouts on test fails (so we're talking about hours to run the asan.exp suite
if that happens). AFAIK, atos is not open-sourced for Darwin, so the best fix
is to use the LLVM version - which is.
---
The following modification is being tested for inclusion in 9.3 (it just makes
the additional check dependent on USING_MAC_INTERPOSE which is fine since the
symbol table for libasan is not affected by this on Darwin/Mac OS).
There is no soname bump needed for this (although, technically, the fault is
not fixed for non-Darwin, in practice the problem has not manifest there
anyway)
diff --git a/libsanitizer/asan/Makefile.am b/libsanitizer/asan/Makefile.am
index 867240d244..6efbc1df7f 100644
--- a/libsanitizer/asan/Makefile.am
+++ b/libsanitizer/asan/Makefile.am
@@ -5,7 +5,7 @@ gcc_version := $(shell @get_gcc_base_ver@
$(top_srcdir)/../gcc/BASE-VER)
DEFS = -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -DASAN_HAS_EXCEPTIONS=1 -DASAN_NEEDS_SEGV=1
-DCAN_SANITIZE_UB=0
if USING_MAC_INTERPOSE
-DEFS += -DMAC_INTERPOSE_FUNCTIONS -DMISSING_BLOCKS_SUPPORT
+DEFS += -DMAC_INTERPOSE_FUNCTIONS -DMISSING_BLOCKS_SUPPORT
-DASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION=0
endif
AM_CXXFLAGS = -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic
-Wno-long-long -fPIC -fno-builtin -fno-exceptions -fno-rtti
-fomit-frame-pointer -funwind-tables -fvisibility=hidden -Wno-variadic-macros
-fno-ipa-icf
AM_CXXFLAGS += $(LIBSTDCXX_RAW_CXX_CXXFLAGS)
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
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Bug 53947 depends on bug 91460, which changed state.
Bug 91460 Summary: gcc -mpreferred-vector-width=256 is slower than -mpreferred-vector-width=128 for some loops
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91460
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
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Subject: [Bug tree-optimization/88915] Try smaller vectorisation factors in scalar fallback
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avieira at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |skpgkp2 at gmail dot com
--- Comment #4 from avieira at gcc dot gnu.org ---
*** Bug 91460 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-651484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:21:51 2019
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Subject: [Bug tree-optimization/91460] gcc -mpreferred-vector-width%6 is slower than -mpreferred-vector-width\x128 for some loops
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avieira at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |avieira at gcc dot gnu.org
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--- Comment #4 from avieira at gcc dot gnu.org ---
Yes this looks like a duplicate of PR 88915. I'll mark it as such.
*** This bug has been marked as a duplicate of bug 88915 ***
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From: "ostash at ostash dot kiev.ua" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
Date: Fri, 16 Aug 2019 09:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067
Viktor Ostashevskyi <ostash at ostash dot kiev.ua> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ostash at ostash dot kiev.ua
--- Comment #10 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
What about "base object constructors" (mangled with C2)?
For simple case like:
---
#include <filesystem>
#include <iostream>
int main(int argc, char** argv)
{
for (const auto& dirElem : std::filesystem::directory_iterator(argv[1]))
std::cout << dirElem.path().filename() << '\n';
}
---
When compiling with Clang 8 against libstdc++ from GCC 9.2.0 I got:
in function
`std::filesystem::directory_iterator::directory_iterator(std::filesystem::directory_iterator&&)':
fs.cpp:(.text._ZNSt10filesystem18directory_iteratorC2EOS0_[_ZNSt10filesystem18directory_iteratorC2EOS0_]+0x1):
undefined reference to `std::__shared_ptr<std::filesystem::_Dir,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr(std::__shared_ptr<std::filesystem::_Dir,
(__gnu_cxx::_Lock_policy)2>&&)'
Checking in libstdc++.so showed that symbols are exported, but only for
complete object constructor:
_ZNSt12__shared_ptrINSt10filesystem7__cxx114_DirELN9__gnu_cxx12_Lock_policyE2EEC1EOS5_
Not sure why, but Clang emits call to base object constructor:
_ZNSt12__shared_ptrINSt10filesystem7__cxx114_DirELN9__gnu_cxx12_Lock_policyE2EEC2EOS5_
I've checked Clang8 vs libstdc++ from GCC 8.3.0 and see that it emits calls to
same base object ctor, but its definition is also emitted, so no linker error
occur.
>From gcc-bugs-return-651488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:27:57 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/91470] New: [10 Regression] bogus uninitialized warning in trans-intrinsic.c
Date: Fri, 16 Aug 2019 09:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91470
Bug ID: 91470
Summary: [10 Regression] bogus uninitialized warning in
trans-intrinsic.c
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
r274563 installed
Index: gcc/fortran/trans-intrinsic.c
===================================================================
--- gcc/fortran/trans-intrinsic.c (revision 274538)
+++ gcc/fortran/trans-intrinsic.c (working copy)
@@ -5428,7 +5428,7 @@ gfc_conv_intrinsic_findloc (gfc_se *se,
tree type;
tree tmp;
tree found;
- tree forward_branch;
+ tree forward_branch = NULL_TREE;
tree back_branch;
gfc_loopinfo loop;
gfc_ss *arrayss;
to silence a maybe-uninit warning caused by jump threading things in
a way not recognizable by the uninit warning predicate analysis.
>From gcc-bugs-return-651489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:31:22 2019
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Subject: [Bug tree-optimization/91470] [10 Regression] bogus uninitialized warning in trans-intrinsic.c
Date: Fri, 16 Aug 2019 09:31:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46720
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46720&action=edit
unreduced testcase
A bit reduced testcase from trans-intrinsic.c (in case it goes latent there due
to changes). Needs more reduction to capture the meat of things. The code
basically does
int a, b;
for (int i = 0; i < 2; ++i)
if (i == 0)
a = 1;
else
b = 2;
use a/b
and we warn on one of the uses. It's not that simple of course since this
kind of simple testcase is handled well...
>From gcc-bugs-return-651490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:31:58 2019
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Subject: [Bug tree-optimization/91470] [10 Regression] bogus uninitialized warning in trans-intrinsic.c
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, needs-reduction
CC| |law at gcc dot gnu.org
Blocks| |24639
Target Milestone|--- |10.0
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
[Bug 24639] [meta-bug] bug to track all Wuninitialized issues
>From gcc-bugs-return-651491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:32:27 2019
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
Date: Fri, 16 Aug 2019 09:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067
--- Comment #11 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
I assume that problem comes from explicit instantiation:
extern template class __shared_ptr<filesystem::_Dir>;
which was added in c8fb3443911413cc88f316305fc6b7bf4861ccaa.
It prevent Clang in emitting "C2" version of constructors on its own.
>From gcc-bugs-return-651493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:33:43 2019
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Subject: [Bug other/91255] Can't use define_subst in target that uses set_attr_alternative
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
Fixed on trunk.
>From gcc-bugs-return-651492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:33:12 2019
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Subject: [Bug other/91255] Can't use define_subst in target that uses set_attr_alternative
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91255
--- Comment #2 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Aug 16 09:32:36 2019
New Revision: 274564
URL: https://gcc.gnu.org/viewcvs?rev=274564&root=gcc&view=rev
Log:
[gensupport] PR 91255: Do not error out immediately on set_attr_alternative
with define_subst
I'm trying to add a define_subst use in the arm backend but am getting many
build errors complaining about:
`set_attr_alternative' is unsupported by `define_subst'
Looking at the gensupport.c code it iterates over all define_insns and errors
if any of them have set_attr_alternative.
The usecase I'm targetting doesn't involve patterns with set_attr_alternative,
so I would like to make the define_subst handling
more robust to only error out if the define_subst is actually attempted on a
set_attr_alternative.
This patch produces the error only if the set_attr_alternative attr matches the
subst name.
This allows a build of the arm backend with a define_subst usage to succeed.
PR other/91255
* gensupport.c (has_subst_attribute): Error out on set_attr_alternative
only if subst_name matches curr_attr string.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gensupport.c
>From gcc-bugs-return-651494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:34:18 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This looks similar to PR target/55023.
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From: "SameeranJayant.Joshi at amd dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/91471] New: f951: internal compiler error: gfc_variable_attr(): Bad array reference
Date: Fri, 16 Aug 2019 09:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91471
Bug ID: 91471
Summary: f951: internal compiler error: gfc_variable_attr():
Bad array reference
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Reporter: SameeranJayant.Joshi at amd dot com
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I can again reproduce the bug
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68283)
on trunk(checked on godbolt compiler explorer) as well my distro gfortran
version:
*****test case:
program dynamic
implicit none
integer,dimension(:), allocatable :: x
allocate(x(1))
stop x(1)
end program dynamic
*****compiling commands:
swamimauli$ gfortran dynamic_alloc.f08
f951: internal compiler error: gfc_variable_attr(): Bad array reference
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
*****gcc version:
swamimauli@ubuntu:~/workspace/fortran_programs/feature_stop$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
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 8.3.0-6ubuntu1'
--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 --enable-bootstrap --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 8.3.0 (Ubuntu 8.3.0-6ubuntu1)
swamimauli@ubuntu:~/workspace/fortran_programs/feature_stop$
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Fri, 16 Aug 2019 09:45:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I have a tentative fix.
>From gcc-bugs-return-651496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:45:39 2019
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Subject: [Bug libstdc++/91371] std::bind and bind_front don't work with function with call convention
Date: Fri, 16 Aug 2019 09:45:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> template<typename T, bool = __is_class(T) || __is_union(T), typename = void>
This needs to exclude pointers as well as class types, because ...
> struct is_referenceable_function : false_type { };
>
> template<typename T>
> struct is_referenceable_function<T, false,
> __void_t<decltype(static_cast<T*>(std::declval<T&>()))>>
This static cast does an explicit conversion, which is allowed from X*& to X**.
The other alternative would be to test for implicit conversion, not explicit.
>From gcc-bugs-return-651498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:47:50 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 46721
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46721&action=edit
Tentative fix
Please give it a try on the PA.
>From gcc-bugs-return-651499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:48:46 2019
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I didn't export that because nothing should need it. Nothing in libstdc++
derives from __shared_ptr<_Dir> and nothing in user code is allowed to refer to
that type, because it's an implementation detail.
The explicit instantiation tells Clang not to emit that constructor, but it
shouldn't cause it to depend on that constructor.
>From gcc-bugs-return-651500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 09:54:49 2019
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
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--- Comment #13 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
(In reply to Jonathan Wakely from comment #12)
> I didn't export that because nothing should need it. Nothing in libstdc++
> derives from __shared_ptr<_Dir> and nothing in user code is allowed to refer
> to that type, because it's an implementation detail.
>
> The explicit instantiation tells Clang not to emit that constructor, but it
> shouldn't cause it to depend on that constructor.
Well, Clang emits call to C2 version somehow. Should it be reported as a but to
Clang?
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can reproduce the link failure. For some reason Clang requires that
constructor at -O1, but not at any other optimization level.
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
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--- Comment #15 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
(In reply to Jonathan Wakely from comment #14)
> I can reproduce the link failure. For some reason Clang requires that
> constructor at -O1, but not at any other optimization level.
It will require it at any -O level with fno-inline.
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
Date: Fri, 16 Aug 2019 10:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067
--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Except -O0, which is what I find surprising.
>From gcc-bugs-return-651504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 11:39:52 2019
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/91472] New: gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
Date: Fri, 16 Aug 2019 11:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91472
Bug ID: 91472
Summary: gmp testsuite segfaults with gcc-8 and gcc-9, works
fine with gcc-7
Product: gcc
Version: 8.0
URL: https://buildd.debian.org/status/fetch.php?pkg=gmp&arc
h=sparc64&ver=2%3A6.1.2%2Bdfsg-4&stamp=1565898628&raw=
0
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Priority: P3
Component: c
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Reporter: glaubitz at physik dot fu-berlin.de
CC: ebotcazou at gcc dot gnu.org, jrtc27 at jrtc27 dot com,
matorola at gmail dot com
Target Milestone: ---
Host: sparc64-*-*
Starting from gcc-8, the testsuite of gmp fails with the test segfaulting:
PASS: t-divis_2exp
PASS: t-cong
PASS: t-cong_2exp
PASS: t-sizeinbase
PASS: t-set_str
PASS: t-aorsmul
../../test-driver: line 107: 227694 Segmentation fault "$@" > $log_file
2>&1
FAIL: t-cmp_d
PASS: t-cmp_si
PASS: t-hamdist
PASS: t-oddeven
PASS: t-popcount
PASS: t-set_f
PASS: t-io_raw
PASS: t-import
PASS: t-export
PASS: t-pprime_p
PASS: t-nextprime
PASS: t-remove
PASS: t-limbs
============================================================================
Testsuite summary for GNU MP 6.1.99
============================================================================
# TOTAL: 64
# PASS: 63
# SKIP: 0
# XFAIL: 0
# FAIL: 1
# XPASS: 0
# ERROR: 0
============================================================================
See tests/mpz/test-suite.log
Please report to gmp-bugs@gmplib.org, see
https://gmplib.org/manual/Reporting-Bugs.html
============================================================================
The same gmp builds and tests fine with gcc-7.
>From gcc-bugs-return-651505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 12:17:58 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Fri, 16 Aug 2019 12:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91347
--- Comment #9 from dave.anglin at bell dot net ---
On 2019-08-16 5:47 a.m., ebotcazou at gcc dot gnu.org wrote:
> Created attachment 46721
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46721&action=edit
> Tentative fix
Testing. Looking at change, it now seems obvious. Thanks for investigating.
The change fixes compilation of testcase.
>From gcc-bugs-return-651506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 12:52:52 2019
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Subject: [Bug tree-optimization/91109] [10 regression][arm] gcc.c-torture/execute/20040709-1.c fails since r273135
Date: Fri, 16 Aug 2019 12:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91109
--- Comment #15 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Since r274532 (gcc-9-branch), I am seeing:
FAIL: gcc.c-torture/execute/20040709-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects execution test
target arm-none-linux-gnueabi
--with-mode arm
--with-cpu cortex-a9
The same test passes on arm-none-linux-gnueabihf, or using --with-mode thumb
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Subject: [Bug target/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 13:17:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 16 13:17:04 2019
New Revision: 274570
URL: https://gcc.gnu.org/viewcvs?rev=274570&root=gcc&view=rev
Log:
2019-08-16 Richard Biener <rguenther@suse.de>
PR target/91469
* config/i386/i386-features.c
(general_scalar_chain::replace_with_subreg): Stop at memory operands.
* gcc.target/i386/pr91469-1.c: New testcase.
* gcc.target/i386/pr91469-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr91469-1.c
trunk/gcc/testsuite/gcc.target/i386/pr91469-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386-features.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-651507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 13:17:19 2019
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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/91469] [10 Regression] ICE in extract_insn, at recog.c:2310 since r274481
Date: Fri, 16 Aug 2019 13:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-651509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 13:32:23 2019
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From: "vittorio.romeo at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81676] Wrong warning with unused-but-set-parameter within 'if constexpr'
Date: Fri, 16 Aug 2019 13:32:00 -0000
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Vittorio Romeo <vittorio.romeo at outlook dot com> changed:
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----------------------------------------------------------------------------
CC| |vittorio.romeo at outlook dot com
--- Comment #3 from Vittorio Romeo <vittorio.romeo at outlook dot com> ---
Found this today, still present in gcc trunk (9.2+). Example:
int main()
{
auto f = [](auto a, auto b) {
if constexpr (sizeof(b) == 1) {
return a;
} else {
return b;
}
};
return f(1, 1) + f(1, 'a');
}
https://gcc.godbolt.org/z/SOvLEV
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Subject: [Bug fortran/91473] New: [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
Date: Fri, 16 Aug 2019 14:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91473
Bug ID: 91473
Summary: [10 regression] test case
libgomp.fortran/appendix-a/a.28.5.f90 fails starting
with r274551
Product: gcc
Version: 10.0
Status: UNCONFIRMED
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Target Milestone: ---
make -k check-target-libgomp
RUNTESTFLAGS=fortran.exp=libgomp.fortran/appendix-a/a.28.5.f90
FAIL: libgomp.fortran/appendix-a/a.28.5.f90 -O (test for excess errors)
# of unexpected failures 1
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/libgomp/testsuite/libgomp.fortran/appendix-a/a.28.5.f90
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/.libs
-I/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp
-I/home/seurer/gcc/gcc-test2/libgomp/testsuite/../../include
-I/home/seurer/gcc/gcc-test2/libgomp/testsuite/.. -fmessage-length=0
-fno-diagnostics-show-caret -Wno-hsa -fdiagnostics-color=never -fopenmp
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/../libquadmath/.libs/
-O -w
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/../libgfortran/.libs
-fintrinsic-modules-path=/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp
-S -o a.28.5.s
/home/seurer/gcc/gcc-test2/libgomp/testsuite/libgomp.fortran/appendix-a/a.28.5.f90:29:20:
Error: Rank mismatch in argument 'x' at (1) (rank-1 and scalar)
compiler exited with status 1
FAIL: libgomp.fortran/appendix-a/a.28.5.f90 -O (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test2/libgomp/testsuite/libgomp.fortran/appendix-a/a.28.5.f90:29:20:
Error: Rank mismatch in argument 'x' at (1) (rank-1 and scalar)
>From gcc-bugs-return-651511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 14:02:32 2019
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Subject: [Bug c++/81676] Wrong warning with unused-but-set-parameter within 'if constexpr'
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem seems to be that we're losing DECL_READ_P on the parm_decl v.
>From gcc-bugs-return-651512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:16:15 2019
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Subject: [Bug sanitizer/91115] stack-buffer-overflow on memset local variable when creating thread on ARM Linux
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--- Comment #6 from Fred Hsueh <fhsueh at roku dot com> ---
Sorry for the long silence ... more on this:
I tracked down where the std::thread() that was causing this issue.
It seems that there are many similar long running tasks that needs to be
completed so we keep a queue of 10x threads. As one finishes, another is kicked
off. But initially, 10x such threads are started in quick succession.
This leads me to believe maybe there's a gap in the locking on the ASAN
metadata side.
I'll see if I can get an example going.
>From gcc-bugs-return-651513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:17:36 2019
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Subject: [Bug fortran/91473] [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
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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 #1 from H.J. Lu <hjl.tools at gmail dot com> ---
481.wrf in SPEC CPU 2006 also got
Error: Type mismatch in argument 'field' at (1); passed INTEGER(4) to REAL(4)
module_io.fppized.f90:18713:23:
18713 | Status )
| 1
>From gcc-bugs-return-651514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:26:56 2019
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Subject: [Bug fortran/91473] [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
In case of wrf, there are
INTEGER :: Field(*)
INTEGER :: FieldType
...
ELSE IF ( FieldType .EQ. WRF_INTEGER ) THEN
CALL call_pkg_and_dist_int ( fcn, &
Hndl , DateStr , VarName , Field , FieldType , Comm , IOComm , &
DomainDesc , MemoryOrder , Stagger , DimNames , &
DomainStart , DomainEnd , &
MemoryStart , MemoryEnd , &
PatchStart , PatchEnd , &
Status )
call_pkg_and_dist_int has
REAL , INTENT(INOUT) :: Field(*)
INTEGER ,INTENT(IN) :: FieldType
Field is used as some kind of generic pointer.
>From gcc-bugs-return-651515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:28:08 2019
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
It looks like -std=legacy is needed for wrf.
>From gcc-bugs-return-651517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:33:46 2019
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Subject: [Bug testsuite/91458] FAIL: g++.dg/tree-ssa/pr19807.C -std=gnu++98 scan-tree-dump-times optimized "&MEM\\\\[\\\\(void .\\\\)&a \\\\+ 8B\\\\]" 3
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Let me fix it.
>From gcc-bugs-return-651516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:33:13 2019
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Subject: [Bug testsuite/91458] FAIL: g++.dg/tree-ssa/pr19807.C -std=gnu++98 scan-tree-dump-times optimized "&MEM\\\\[\\\\(void .\\\\)&a \\\\+ 8B\\\\]" 3
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I think it's just a mistake in the pattern:
/* { dg-final { scan-tree-dump-times "&MEM\\\[\\\(void .\\\)&a \\\+ 8B\\\]" 3
"optimized" { target { ! store_merge } } } }
{ dg-final { scan-tree-dump-times "&MEM <int> \\\[\\\(void .\\\)&a \\\+
8B\\\]" 3 "optimized" { target { store_merge } } } } */
No store merging takes place here so the test should use the second pattern
unconditionally.
>From gcc-bugs-return-651518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 15:35:24 2019
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Subject: [Bug tree-optimization/91109] [10 regression][arm] gcc.c-torture/execute/20040709-1.c fails since r273135
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--- Comment #16 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Fri Aug 16 15:34:47 2019
New Revision: 274573
URL: https://gcc.gnu.org/viewcvs?rev=274573&root=gcc&view=rev
Log:
2019-08-16 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/91109
* lra-int.h (lra_need_for_scratch_reg_p): Declare.
* lra.c (lra): Use lra_need_for_scratch_reg_p.
* lra-spills.c (lra_need_for_scratch_reg_p): New function.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-int.h
trunk/gcc/lra-spills.c
trunk/gcc/lra.c
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
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--- Comment #10 from John David Anglin <danglin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #6)
> This looks similar to PR target/55023.
Yes. Looking at how scan_insn() evolved since PR target/55023, it is
clear why this is a regression.
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Subject: [Bug libstdc++/91371] std::bind and bind_front don't work with function with call convention
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted: https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01181.html
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Subject: [Bug libstdc++/91456] std::function and std::is_invocable_r do not understand guaranteed elision
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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 on trunk so far, but I'd like to backport this for 9.3 too.
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Aug 16 15:47:25 2019
New Revision: 274574
URL: https://gcc.gnu.org/viewcvs?rev=274574&root=gcc&view=rev
Log:
PR testsuite/91458
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/pr19807.C: Use the same search pattern
unconditionally (correcting r272199, PR middle-end/90676).
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19807.C
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Subject: [Bug testsuite/91458] FAIL: g++.dg/tree-ssa/pr19807.C -std=gnu++98 scan-tree-dump-times optimized "&MEM\\\\[\\\\(void .\\\\)&a \\\\+ 8B\\\\]" 3
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Aug 16 15:47:25 2019
New Revision: 274574
URL: https://gcc.gnu.org/viewcvs?rev=274574&root=gcc&view=rev
Log:
PR testsuite/91458
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/pr19807.C: Use the same search pattern
unconditionally (correcting r272199, PR middle-end/90676).
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19807.C
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I've made the change in r274574.
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Subject: [Bug libstdc++/90415] [9/10 Regression] std::is_copy_constructible<std::tuple<std::any>> is incomplete
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Lei YU from comment #7)
> Additional information.
>
> std::experimental::fundamentals_v1::any has no problem, so the below code
> compiles fine.
The difference is that std::experimental::any doesn't constrain the any(T&&)
constructor on is_copy_constructible<T>, instead it just makes it a hard error
(using a static assert in the constructor body).
std::any has to SFINAE the any(T&&) constructor away if T is not copy
constructible, which leads to a cycle when that constructor is being considered
during instantiation of is_copy_constructible<T>.
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Subject: [Bug preprocessor/77672] wrong rich location in warning: writing a terminating nul past the end
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Known to work| |7.1.0
Resolution|--- |FIXED
Known to fail| |7.0
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
The output looks good now and has since 7.1 so we can resolve this bug.
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88076] Shared Memory implementation for Coarrays
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--- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #15)
> On Wed, Aug 14, 2019 at 08:33:04PM +0000, koenigni at gcc dot gnu.org wrote:
> >
> > Yes, I'm still working on it (slowly, though, sorry :( ). Here is a diff of my
> > current trunk. I don't know what exactly changed since the last version, but
> > the biggest two things still missing are actually deallocating coarrays in
> > DEALLOCATE-statements or in types and all the intrinsics like CO_SUM. Locks
> > already work, though.
>
> Thanks for the update. No need to apologize. I assume you
> are off doing work, school, fun stuff, ...
>
> I'm running out of bugs that I can fix, so thought I would
> venture into coarray territory. Having a SHM backend might
> be easier to work with than opencoarray and openmpi.
I will be loading up these patches on my new machine here to as well. so we
start to grind away on this.
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Subject: [Bug tree-optimization/18487] Warnings for pure and const functions that are not actually pure or const
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Dávid Bolvanský <david.bolvansky at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david.bolvansky at gmail dot com
--- Comment #18 from Dávid Bolvanský <david.bolvansky at gmail dot com> ---
a.c
int foo(void) __attribute__((const));
int main(void) {
return foo();
}
b.c
#include <stdio.h>
int foo(void) {
puts("BUM");
return 0;
}
gcc a.c b.c -Wall -Wextra -flto -o bum
It would be nice to get a warning.
>From gcc-bugs-return-651529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 16:27:57 2019
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Subject: [Bug fortran/68401] improve 'Allocation would exceed memory limit'
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2019-08/msg01172.ht
| |ml
--- Comment #12 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Patch at https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01172.html
With this the test.f90 in the original report prints something like:
In file 'test.f90', around line 5: Error allocating 4294967296 bytes: Cannot
allocate memory
Error termination. Backtrace:
#0 0x400874 in test
at /home/janne/src/gfortran/my-patches/pr68401-oserror/test.f90:4
#1 0x4008d3 in main
at /home/janne/src/gfortran/my-patches/pr68401-oserror/test.f90:4
(yes, the location is off a little bit)
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Subject: [Bug tree-optimization/91109] [10 regression][arm] gcc.c-torture/execute/20040709-1.c fails since r273135
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--- Comment #17 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Fri Aug 16 16:31:13 2019
New Revision: 274577
URL: https://gcc.gnu.org/viewcvs?rev=274577&root=gcc&view=rev
Log:
2019-08-16 Bernd Edlinger <bernd.edlinger@hotmail.de>
Backport from mainline
2019-08-07 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/91109
* lra-remat.c (update_scratch_ops): Remove assignment of the
hard register.
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/lra-remat.c
>From gcc-bugs-return-651531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 16:37:40 2019
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Subject: [Bug tree-optimization/91109] [10 regression][arm] gcc.c-torture/execute/20040709-1.c fails since r273135
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--- Comment #18 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Fri Aug 16 16:37:04 2019
New Revision: 274578
URL: https://gcc.gnu.org/viewcvs?rev=274578&root=gcc&view=rev
Log:
2019-08-16 Bernd Edlinger <bernd.edlinger@hotmail.de>
Backport from mainline
2019-08-16 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/91109
* lra-int.h (lra_need_for_scratch_reg_p): Declare.
* lra.c (lra): Use lra_need_for_scratch_reg_p.
* lra-spills.c (lra_need_for_scratch_reg_p): New function.
Modified:
branches/gcc-9-branch/gcc/ChangeLog
branches/gcc-9-branch/gcc/lra-int.h
branches/gcc-9-branch/gcc/lra-spills.c
branches/gcc-9-branch/gcc/lra.c
>From gcc-bugs-return-651532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 17:07:34 2019
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Subject: [Bug fortran/88076] Shared Memory implementation for Coarrays
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--- Comment #17 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I am getting this at the moment after applying patches to trunk.
../../trunk/gcc/fortran/trans-stmt.c: In function ‘tree_node*
gfc_trans_deallocate(gfc_code*)’:
../../trunk/gcc/fortran/trans-stmt.c:6925:4: error: ‘is_native_coarray’ was not
declared in this scope
6925 | is_native_coarray = ar_attr.codimension;
| ^~~~~~~~~~~~~~~~~
../../trunk/gcc/fortran/trans-stmt.c:6928:45: error: ‘is_native_coarray’ was
not declared in this scope
6928 | if (expr->rank || is_coarray_array || is_native_coarray)
| ^~~~~~~~~~~~~~~~~
make[2]: *** [Makefile:1118: fortran/trans-stmt.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [Makefile:4360: all-gcc] Error 2
make: *** [Makefile:958: all] Error 2
>From gcc-bugs-return-651533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 17:31:36 2019
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Subject: [Bug tree-optimization/91109] [10 regression][arm] gcc.c-torture/execute/20040709-1.c fails since r273135
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--- Comment #19 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Hope all is now working again.
>From gcc-bugs-return-651534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 18:16:34 2019
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Subject: [Bug fortran/91473] [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to seurer from comment #0)
> make -k check-target-libgomp
> RUNTESTFLAGS=fortran.exp=libgomp.fortran/appendix-a/a.28.5.f90
>
> FAIL: libgomp.fortran/appendix-a/a.28.5.f90 -O (test for excess errors)
Easy enough to "fix" with
Index: testsuite/libgomp.fortran/appendix-a/a.28.5.f90
===================================================================
--- testsuite/libgomp.fortran/appendix-a/a.28.5.f90 (Revision 274370)
+++ testsuite/libgomp.fortran/appendix-a/a.28.5.f90 (Arbeitskopie)
@@ -1,5 +1,5 @@
! { dg-do compile }
-! { dg-options "-w" }
+! { dg-options "-w -std=legacy" }
!
! "-w" added as libgomp/testsuite seemingly cannot parse with
! dg-warning Fortran's output. Fortran warns for "call sub1(a)"
but the real problem is that this is illegal Fortran. You cannot have
mismatching ranks in an argument, even if it "happens" to work.
Same thing with the SPEC code, I suppose.
>From gcc-bugs-return-651535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 18:25:34 2019
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Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-16
CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
I have a patch that prevents the ICE. Remove ICE-on-valid-code
tag as the code is invalid.
>From gcc-bugs-return-651536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 18:52:34 2019
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Subject: [Bug c++/91474] New: Internal compiler error when building mabi2 mips64-elf cross-compiler: segfault in parallel_settings.cc
Date: Fri, 16 Aug 2019 18:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91474
Bug ID: 91474
Summary: Internal compiler error when building mabi=32
mips64-elf cross-compiler: segfault in
parallel_settings.cc
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: joey.dumont at gmail dot com
CC: joey.dumont at gmail dot com
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: mips64-elf
Build: x86_64-pc-linux-gnu
Created attachment 46722
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46722&action=edit
Patch to enable the 32-bit ABI
Let me preface this by saying that this is my first bug report, and I could not
find information on what to submit for issues with cross-compilers. Let me know
what information you need and I'll gladly provide it.
When trying to build a gcc-9.2.0 mips64-elf cross-compiler with gcc-9.1.0, I
get an internal compiler error when trying to compile
`libstdc++-v3/src/c++98/parallel_settings.cc`:
```
libtool: compile:
/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/./gcc/xgcc
-shared-libgcc
-B/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/./gcc
-nostdinc++
-L/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/src
-L/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/src/.libs
-L/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/libsupc++/.libs
-B/usr/mips64-elf/bin/ -B/usr/mips64-elf/lib/ -isystem /usr/mips64-elf/include
-isystem /usr/mips64-elf/sys-include -mabi=32
-I/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/../libgcc
-I/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/include/mips64-elf
-I/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/include
-I/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/libsupc++
-std=gnu++98 -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual
-Wabi=2 -fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=parallel_settings.lo -g -O2 -mabi=32 -D_GLIBCXX_PARALLEL -c
/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/src/c++98/parallel_settings.cc
-o parallel_settings.o
during RTL pass: split2
/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/src/c++98/parallel_settings.cc:
In function '(static initializers for
/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/src/c++98/parallel_settings.cc)':
/home/valandil/software/n64-dev/mips64-elf-gcc/src/gcc-9.2.0/libstdc++-v3/src/c++98/parallel_settings.cc:42:1:
internal compiler error: Segmentation fault
42 | }
| ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
make[9]: *** [Makefile:912: parallel_settings.lo] Error 1
make[9]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/src/c++98'
make[8]: *** [Makefile:730: all-recursive] Error 1
make[8]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3/src'
make[7]: *** [Makefile:562: all-recursive] Error 1
make[7]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3'
make[6]: *** [Makefile:487: all] Error 2
make[6]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/32/libstdc++-v3'
make[5]: *** [Makefile:855: multi-do] Error 1
make[5]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/libstdc++-v3'
make[4]: *** [Makefile:823: all-multi] Error 2
make[4]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/libstdc++-v3'
make[3]: *** [Makefile:562: all-recursive] Error 1
make[3]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/libstdc++-v3'
make[2]: *** [Makefile:487: all] Error 2
make[2]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc/mips64-elf/libstdc++-v3'
make[1]: *** [Makefile:11232: all-target-libstdc++-v3] Error 2
make[1]: Leaving directory
'/home/valandil/software/n64-dev/mips64-elf-gcc/src/build-gcc'
make: *** [Makefile:951: all] Error 2
```
Here's the output of `gcc -v`:
```
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/9.1.0/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 --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 9.1.0 (GCC)
```
And here are the build options for the cross-compiler:
```
"${srcdir}"/gcc-${pkgver}/configure \
--prefix=/usr \
--target=${_target} \
--host=$CHOST \
--build=$CHOST \
--with-arch=from-abi \
--with-sysroot=/usr/${_target} \
--libdir=/usr/lib \
--libexecdir=/usr/lib \
--with-gnu-as \
--with-gnu-ld \
--with-python-dir=share/gcc-${_target} \
--with-newlib \
--without-included-gettext \
--enable-checking=release \
--enable-languages=c,c++ \
--disable-decimal-float \
--disable-gold \
--disable-libatomic \
--disable-libgcj \
--disable-libgomp \
--disable-libitm \
--disable-libquadmath \
--disable-libquadmath-support \
--disable-libsanitizer \
--disable-libssp \
--disable-libunwind-exceptions \
--disable-libvtv \
--enable-multilib \
--disable-nls \
--disable-shared \
--disable-threads \
--disable-werror \
--enable-lto \
--enable-plugin
```
where `_target=mips64-elf`.
To build this cross-compiler, I have modified gcc/config/t-elf with the
mabi32.patch (attached).
I am on Arch Linux:
```
$ uname -a
Linux terra 5.2.8-arch1-1-ARCH #1 SMP PREEMPT Fri Aug 9 21:36:07 UTC 2019
x86_64 GNU/Linux
```
>From gcc-bugs-return-651537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 19:01:01 2019
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Received: (qmail 81862 invoked by uid 48); 16 Aug 2019 19:00:56 -0000
From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85827] false positive for -Wunused-but-set-variable because of constexpr-if
Date: Fri, 16 Aug 2019 19:01:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This particular problem was fixed in r269433, because the condition is not
dependent. I'll add the test. For another problem not fixed by this rev see
PR81676.
>From gcc-bugs-return-651538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 19:10:01 2019
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From: "eric_musser at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91475] New: Optimization causes infinite loop
Date: Fri, 16 Aug 2019 19:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91475
Bug ID: 91475
Summary: Optimization causes infinite loop
Product: gcc
Version: 9.2.0
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The following code on x86-64 9.2.0 compiled with:
gcc -Wall -O2
unexpectedly produces wrong output and an infinite loop:
#include <stdio.h>
#include <iostream>
int main(int argc, char** argv) {
char buf[50];
for (int j = 0; j < 9; ++j) {
std::cout << (j * 0x20000001) << " " << j << std::endl;
sprintf(buf, "%d", j);
}
return 0;
}
Output (truncated) is:
0 0
536870913 1
1073741826 2
1610612739 3
-2147483644 4
-1610612731 5
-1073741818 6
-536870905 7
8 8
536870921 9
1073741834 10
1610612747 11
-2147483636 12
-1610612723 13
...
The sprintf is present only to prevent the loop from being unrolled (and the
issue doesn't occur). The issue appears to because the code is being optimized
roughly as:
int main(int argc, char** argv) {
char buf[50];
for (int j = 0, running_j = 0; running_j != 9 * 0x20000001LL ; running_j +=
0x20000001, ++j) {
std::cout << running_j << " " << j << std::endl;
sprintf(buf, "%d", j);
}
return 0;
}
It loops because running_j is int32 and cannot possibly equal the pre-computed
total. The optimizer actually detects this and removes the end condition of the
for loop completely.
I realize the code is invoking undefined behavior because of signed overflow
with j * 0x20000001LL but it seems either the compiler should error/warning
because of this or the for loop optimization should not happen. Without, the
sprintf I do see a warning of undefined behavior (in loop iteration 4).
I see other bugs similar to this but this is the only I see with a hardcoded
constant as the end condition of the for loop.
>From gcc-bugs-return-651539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 19:28:05 2019
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From: "abbeyj+gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91476] New: const reference variables sharing the same name in two anonymous namespaces cause a multiple definition error
Date: Fri, 16 Aug 2019 19:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91476
Bug ID: 91476
Summary: const reference variables sharing the same name in two
anonymous namespaces cause a multiple definition error
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
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There is a problem when having two different variables both of which are const
references and which have the same name but are in different anonymous
namespaces. You'll need at least two files to reproduce this, say a.cpp and
b.cpp.
a.cpp:
namespace { const int &foo = 1; }
int main() {}
b.cpp:
namespace { const int &foo = 2; }
Then compile and link:
$ g++ -c a.cpp b.cpp
$ g++ a.o b.o
b.o:(.rodata+0x0): multiple definition of `_ZGRN12_GLOBAL__N_13fooE_'
a.o:(.rodata+0x0): first defined here
collect2: error: ld returned 1 exit status
This works fine in older versions of GCC and in clang.
Looking at the output on https://gcc.godbolt.org/z/A6LxAG shows the following
differences:
- The mangled name for "reference temporary #0 for (anonymous namespace)::foo"
changed from _ZGRN12_GLOBAL__N_13fooE0 to _ZGRN12_GLOBAL__N_13fooE_.
Interestingly, godbolt.org is unable to demangle the second name.
- There is an additional line `.globl _ZGRN12_GLOBAL__N_13fooE_`. This seems
like the part causing the issue.
I originally found this when using objects of class type with user-defined
constructors. I reduced it down to using `int` for this bug report. Any
proposed fix should probably be tested with such types in addition to plain
`int`.
gcc version 9.1.0 (GCC)
Target: x86_64-pc-linux-gnu
>From gcc-bugs-return-651540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 19:51:39 2019
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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++/91475] Optimization causes infinite loop
Date: Fri, 16 Aug 2019 19:51:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Signed integer overflow is undefined at runtime; this means we cannot error out
when it happens at compile time. The warning is not done for loops on purpose
since those are normally places where the user wants to take advantage of the
undefineness.
Use -fsanitize=undefined to find it at runtime.
It is hard sometimes to find that the code will run into this code.
>From gcc-bugs-return-651541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 20:15:54 2019
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/91473] [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
Date: Fri, 16 Aug 2019 20:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91473
--- Comment #5 from seurer at gcc dot gnu.org ---
For what it's worth several spec 2000 tests also won't compile any more after
this revision.
I guess -std=legacy all around!
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85827] false positive for -Wunused-but-set-variable because of constexpr-if
Date: Fri, 16 Aug 2019 20:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
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> ---
Done.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85827] false positive for -Wunused-but-set-variable because of constexpr-if
Date: Fri, 16 Aug 2019 20:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Aug 16 20:40:36 2019
New Revision: 274587
URL: https://gcc.gnu.org/viewcvs?rev=274587&root=gcc&view=rev
Log:
PR c++/85827
g++.dg/cpp1z/constexpr-if29.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/constexpr-if29.C
Modified:
trunk/gcc/cp/ChangeLog
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/89180] [meta-bug] bogus/missing -Wunused warnings
Date: Fri, 16 Aug 2019 20:41:00 -0000
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Bug 89180 depends on bug 85827, which changed state.
Bug 85827 Summary: false positive for -Wunused-but-set-variable because of constexpr-if
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
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>From gcc-bugs-return-651545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 20:42:57 2019
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Subject: [Bug fortran/88076] Shared Memory implementation for Coarrays
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Nicolas Koenig <koenigni at gcc dot gnu.org> changed:
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Attachment #46714|0 |1
is obsolete| |
--- Comment #18 from Nicolas Koenig <koenigni at gcc dot gnu.org> ---
Created attachment 46723
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46723&action=edit
Compiler Diff
I accidentally attached an old patch, here is the right one :) And thanks for
helping, Jerry, what will you be working on?
>From gcc-bugs-return-651546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 20:51:17 2019
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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89179] compiler error: in ggc_set_mark, at ggc-page.c:1532
Date: Fri, 16 Aug 2019 20:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89179
--- Comment #16 from Steve Ellcey <sje at gcc dot gnu.org> ---
I built ggc-page.c with GCC_DEBUG_LEVEL 5 and I see:
Allocating object, requested size=360, actual=360 at 0xffff8726c210 on
0x10549200
Freeing object, actual size=360, at 0xffff8726c210 on 0x10549200
But then I wind up calling gt_ggc_mx_symtab_node with x_p of 0xffff8726c210.
I don't think I should be calling this (via ggc_mark_roots and ggc_collect) if
it has already been freed.
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From: "eric_musser at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91475] Optimization causes infinite loop
Date: Fri, 16 Aug 2019 21:04:00 -0000
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--- Comment #2 from Eric Musser <eric_musser at yahoo dot com> ---
But in this case the undefineness is not directly related to the for loop.
Further the optimizer that changes the loop to maintain and compare j *
0x20000001 as opposed to just j could detect certain overflow as the upperbound
for the loop is a constant (j < 9) -- since 9 * 0x20000001 > (1<<31). In this
case the optimization could either be disabled or produce a warning. The fact
the end-condition of the for loop is optimized away completely suggests this is
not a runtime issue (the infinite loop is hardcoded into resulting assembly).
In the case the upperbound of the for loop is variable I agree it is not
possible to detect nor may it be worth disabling the optimization if there is
only a chance of overflow.
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Subject: [Bug c++/90885] GCC should warn about 2^16 and 2^32 and 2^64
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--- Comment #20 from Dávid Bolvanský <david.bolvansky at gmail dot com> ---
Clang implemented [0] this diagnostic under -Wxor-used-as-pow.
From user perspective it would be reasonable if GCC follows this naming.
[0] https://reviews.llvm.org/D63423
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81676] Wrong warning with unused-but-set-parameter within 'if constexpr'
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Well, patch posted: https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01196.html
I'm not very optimistic about it being accepted, but so far no one has
submitted anything better.
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Subject: [Bug target/91472] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
Date: Fri, 16 Aug 2019 21:47:00 -0000
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--- Comment #1 from Anatoly Pugachev <matorola at gmail dot com> ---
compiling under gcc-8 but without "-O2" in CFLAGS makes it PASS instead of FAIL
(segfault).
>From gcc-bugs-return-651551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 16 22:44:46 2019
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Subject: [Bug tree-optimization/91457] FAIL: g++.dg/warn/Warray-bounds-4.C -std=gnu++98 (test for warnings, line 25)
Date: Fri, 16 Aug 2019 22:44:00 -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> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01202.html
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
Date: Fri, 16 Aug 2019 23:03:00 -0000
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Bug 56456 depends on bug 35903, which changed state.
Bug 35903 Summary: false Warray-bounds warning when passing quoted string to function strcmp(arg,"no");
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35903
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug middle-end/35903] false Warray-bounds warning when passing quoted string to function strcmp(arg,"no");
Date: Fri, 16 Aug 2019 23:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
I haven't been able to reproduce the false positive with any of the test cases
here, with -O2 or -O3 and with -funsigned-chars or without. Since there have
been updates in almost a decade I'm going to close this. If someone still can
reproduce it please either reopen this bug or open a new one and include a test
case that reproduce the warning and compiles without errors. Also mention the
target for which you are compiling -- at least one of the attachments looks
like it's from a powerpc system.
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Subject: [Bug fortran/78739] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1477
Date: Fri, 16 Aug 2019 23:18:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #2 from kargl at gcc dot gnu.org ---
I have a patch that detects most cases of a statement function re-using the
name of the containing function. The only situation that I cannot detect is
function a()
a() = x
end function
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88076] Shared Memory implementation for Coarrays
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--- Comment #19 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Nicolas Koenig from comment #18)
> Created attachment 46723 [details]
> Compiler Diff
>
> I accidentally attached an old patch, here is the right one :) And thanks
> for helping, Jerry, what will you be working on?
My first step is to get what you have set up here and get some test cases in
place and try some things, then I can look further at trying to understand.
Then go from there. Will let you know seprately from this PR so we dont clutter
it up here. I also need to coordinate with Steve as we look at it.
>From gcc-bugs-return-651556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 00:09:44 2019
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Subject: [Bug c++/91477] New: error messages stop including column numbers for large source file
Date: Sat, 17 Aug 2019 00:09:00 -0000
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Bug ID: 91477
Summary: error messages stop including column numbers for large
source file
Product: gcc
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At work we have generated headers that can be millions of lines. While
compiling with gcc-8.2.1, I noticed that I'm not getting column numbers in
error messages, only getting filenames and line numbers.
I initially tried adding -fshow-column but that didn't help.
After experimenting a bit, the problem appears to show up when header files are
large, regardless what code is actually in the headers, and regardless of
whether the code in the headers is related to the code that is erroneous.
I didn't try to find the exact file size to produce this problem, but I
observed that when the pre-processed source file had about 690k lines (~26MB in
size), column numbers were no longer shown in errors.
The only other compiler i had was gcc4.8.2 and I don't have the same problem.
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Subject: [Bug c++/90393] [9/10 Regression] ICE in return statement with a conditional operator, one of the second and third arguments is throw, and the other is a const variable of a class with a nontrivial copy constructor.
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Aug 17 01:34:00 2019
New Revision: 274597
URL: https://gcc.gnu.org/viewcvs?rev=274597&root=gcc&view=rev
Log:
PR c++/90393 - ICE with throw in ?:
I fixed the DR 1560 implementation properly for GCC 10, but for GCC 9 feel
that it's better not to change the meaning of well-formed code. Reverting
the incomplete implementation fixes the ICEs.
* call.c (build_conditional_expr_1): Revert changes from
PR c++/64372 and c++/86205.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/expr/cond15.C
branches/gcc-9-branch/gcc/testsuite/g++.dg/expr/cond16.C
Removed:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp1y/dr1560.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/call.c
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Subject: [Bug c++/64372] [DR1560] Gratuitous lvalue-to-rvalue conversion in conditional-expression with throw-expression operand
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Aug 17 01:34:00 2019
New Revision: 274597
URL: https://gcc.gnu.org/viewcvs?rev=274597&root=gcc&view=rev
Log:
PR c++/90393 - ICE with throw in ?:
I fixed the DR 1560 implementation properly for GCC 10, but for GCC 9 feel
that it's better not to change the meaning of well-formed code. Reverting
the incomplete implementation fixes the ICEs.
* call.c (build_conditional_expr_1): Revert changes from
PR c++/64372 and c++/86205.
Added:
branches/gcc-9-branch/gcc/testsuite/g++.dg/expr/cond15.C
branches/gcc-9-branch/gcc/testsuite/g++.dg/expr/cond16.C
Removed:
branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp1y/dr1560.C
Modified:
branches/gcc-9-branch/gcc/cp/ChangeLog
branches/gcc-9-branch/gcc/cp/call.c
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Subject: [Bug c++/90393] [9/10 Regression] ICE in return statement with a conditional operator, one of the second and third arguments is throw, and the other is a const variable of a class with a nontrivial copy constructor.
Date: Sat, 17 Aug 2019 01:38:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 10 and 9.3.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/64372] [DR1560] Gratuitous lvalue-to-rvalue conversion in conditional-expression with throw-expression operand
Date: Sat, 17 Aug 2019 01:39:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work|9.0 |
Resolution|--- |FIXED
Target Milestone|--- |10.0
--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed properly for GCC 10.
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Subject: [Bug fortran/68401] improve 'Allocation would exceed memory limit'
Date: Sat, 17 Aug 2019 05:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68401
--- Comment #13 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Sat Aug 17 05:45:37 2019
New Revision: 274599
URL: https://gcc.gnu.org/viewcvs?rev=274599&root=gcc&view=rev
Log:
PR fortran/68401 Improve allocation error message
Improve the error message that is printed when a memory allocation
fails, by including the location, and the size of the allocation that
failed.
Regtested on x86_64-pc-linux-gnu.
gcc/fortran/ChangeLog:
2019-08-17 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/68401
* trans-decl.c (gfc_build_builtin_function_decls): Replace
os_error with os_error_at decl.
* trans.c (trans_runtime_error_vararg): Modify so the error
function decl is passed directly.
(gfc_trans_runtime_error): Pass correct error function decl.
(gfc_trans_runtime_check): Likewise.
(trans_os_error_at): New function.
(gfc_call_malloc): Use trans_os_error_at.
(gfc_allocate_using_malloc): Likewise.
(gfc_call_realloc): Likewise.
* trans.h (gfor_fndecl_os_error): Replace with gfor_fndecl_os_error_at.
libgfortran/ChangeLog:
2019-08-17 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/68401
* gfortran.map: Add GFORTRAN_10 node, add _gfortran_os_error_at
symbol.
* libgfortran.h (os_error_at): New prototype.
* runtime/error.c (os_error_at): New function.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/libgfortran/ChangeLog
trunk/libgfortran/gfortran.map
trunk/libgfortran/libgfortran.h
trunk/libgfortran/runtime/error.c
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Subject: [Bug fortran/91300] Wrong runtime error message with allocate and errmsgDate: Sat, 17 Aug 2019 05:53:00 -0000
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Bug 91300 depends on bug 68401, which changed state.
Bug 68401 Summary: improve 'Allocation would exceed memory limit'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68401
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----------------------------------------------------------------------------
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Subject: [Bug fortran/68401] improve 'Allocation would exceed memory limit'
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Fixed on trunk, closing.
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Subject: [Bug fortran/91443] -Wargument-mismatch does not catch mismatch for global procedure
Date: Sat, 17 Aug 2019 05:58:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jb at gcc dot gnu.org
--- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> ---
I'm seeing a failure in the testcase libgomp.fortran/appendix-a/a.28.5.f90
which looks like it might(?) be caused by this:
$ gfortran a.28.5.f90
a.28.5.f90:29:20:
29 | CALL SUB1(A)
| 1
Error: Rank mismatch in argument ‘x’ at (1) (rank-1 and scalar)
Or is this something else?
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Subject: [Bug middle-end/89544] Argument marshalling incorrectly assumes stack slots are naturally aligned.
Date: Sat, 17 Aug 2019 07:15:00 -0000
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--- Comment #6 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
This is half fixed now:
Since r274531 the original test case no longer generates wrong code,
but only slightly non-optimal code.
I had so far two test cases:
$ cat unaligned-argument-1.c
/* { dg-do compile } */
/* { dg-require-effective-target arm_arm_ok } */
/* { dg-require-effective-target arm_ldrd_strd_ok } */
/* { dg-options "-marm -mno-unaligned-access -O3" } */
struct s {
int a, b;
} __attribute__((aligned(8)));
struct s f0;
void f(int a, int b, int c, int d, struct s f)
{
f0 = f;
}
/* { dg-final { scan-assembler-times "ldrd" 1 } } */
/* { dg-final { scan-assembler-times "strd" 1 } } */
/* { dg-final { scan-assembler-times "stm" 0 } } */
$ cat unaligned-argument-2.c
/* { dg-do compile } */
/* { dg-require-effective-target arm_arm_ok } */
/* { dg-require-effective-target arm_ldrd_strd_ok } */
/* { dg-options "-marm -mno-unaligned-access -O3" } */
struct s {
int a, b;
} __attribute__((aligned(8)));
struct s f0;
void f(int a, int b, int c, int d, int e, struct s f)
{
f0 = f;
}
/* { dg-final { scan-assembler-times "ldrd" 0 } } */
/* { dg-final { scan-assembler-times "strd" 0 } } */
/* { dg-final { scan-assembler-times "stm" 1 } } */
the remaining issue is that the fist one should generate ldrd/strd
instead of stm.
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--- Comment #7 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
However while writing the patch "Sanitizing the middle-end interface
to the back-end for strict alignment":
https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01130.html
I discovered another wrong code bug, this time affecting all arch:
$ cat unaligned-argument-3.c
/* { dg-do compile } */
/* { dg-require-effective-target arm_arm_ok } */
/* { dg-require-effective-target arm_ldrd_strd_ok } */
/* { dg-options "-marm -mno-unaligned-access -O3" } */
typedef int __attribute__((aligned(1))) s;
void x(char*, s*);
void f(char a, s f)
{
x(&a, &f);
}
/* { dg-final { scan-assembler-times "str\t\[^\\n\]*\\\[sp\\\]" 1 } } */
/* { dg-final { scan-assembler-times "str\t\[^\\n\]*\\\[sp, #3\\\]" 0 } } */
currently with -marm -mno-unaligned-access -O3 we generate:
f:
@ args = 0, pretend = 0, frame = 8
@ frame_needed = 0, uses_anonymous_args = 0
str lr, [sp, #-4]!
sub sp, sp, #12
mov r3, r0
str r1, [sp, #3]
add r0, sp, #7
add r1, sp, #3
strb r3, [sp, #7]
bl x
add sp, sp, #12
@ sp needed
ldr pc, [sp], #4
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
Date: Sat, 17 Aug 2019 08:04:00 -0000
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--- Comment #2 from Sameeran Joshi <SameeranJayant.Joshi at amd dot com> ---
(In reply to kargl from comment #1)
> I have a patch that prevents the ICE. Remove ICE-on-valid-code
> tag as the code is invalid.
It fails when a value is assigned to the allocated space:
program dynamic
implicit none
integer,dimension(:), allocatable :: x
allocate(x(1))
x(1) = 10
stop x(1)
end program dynamic
Is above ICE-ON-INVALID code ?
Can you please specify the reason?
Thanks
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Subject: [Bug libstdc++/41861] [DR 887][C++0x] <condition_variable> does not use monotonic_clock
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--- Comment #18 from Mike Crowe <mac at mcrowe dot com> ---
(In reply to Mike Crowe from comment #17)
> In https://sourceware.org/ml/libc-alpha/2019-02/msg00637.html , I proposed
> the addition of the pthread_cond_clockwait function (among others) to glibc,
> and whilst there are a few comments on the patches, there's been no
> fundamental objections. I'm just working on sorting out some things in the
> test suite before these patches can land.
This has landed in glibc 2.30.
> Once this function is available in glibc, it will be relatively
> straightforward to support both steady_clock and system_clock correctly in
> condition_variable.
Patches posted at https://gcc.gnu.org/ml/libstdc++/2019-07/msg00044.html .
> After many years of me letting this languish, I'm optimistic that we can get
> this fixed properly before the tenth anniversary of Aaron's original bug
> submission!
There's still time! :)
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
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--- Comment #24 from Uroš Bizjak <ubizjak at gmail dot com> ---
It looks that the patch introduced a (small?) runtime regression of 5% in
SPEC2000 300.twolf on haswell [1]. Maybe worth looking at.
[1]
https://gcc.opensuse.org/gcc-old/SPEC/CINT/sb-czerny-head-64/300_twolf_recent_big.png
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Subject: [Bug fortran/91443] -Wargument-mismatch does not catch mismatch for global procedure
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Janne Blomqvist from comment #3)
> I'm seeing a failure in the testcase libgomp.fortran/appendix-a/a.28.5.f90
> which looks like it might(?) be caused by this:
>
> $ gfortran a.28.5.f90
> a.28.5.f90:29:20:
>
> 29 | CALL SUB1(A)
> | 1
> Error: Rank mismatch in argument ‘x’ at (1) (rank-1 and scalar)
>
> Or is this something else?
Yep, that's PR 91473.
I think I will just commit that one with -std=legacy...
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Subject: [Bug fortran/91473] [10 regression] test case libgomp.fortran/appendix-a/a.28.5.f90 fails starting with r274551
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Aug 17 11:57:25 2019
New Revision: 274602
URL: https://gcc.gnu.org/viewcvs?rev=274602&root=gcc&view=rev
Log:
2019-08-17 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/91473
* testsuite/libgomp.fortran/appendix-a/a.28.5.f90: Add
-std=legacy so invalid code in the test case is accepted.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.fortran/appendix-a/a.28.5.f90
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Subject: [Bug libgomp/91473] Test case libgomp.fortran/appendix-a/a.28.5.f90 is invalid
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-17
CC| |jakub at gcc dot gnu.org
Component|fortran |libgomp
Target Milestone|--- |10.0
Summary|[10 regression] test case |Test case
|libgomp.fortran/appendix-a/ |libgomp.fortran/appendix-a/
|a.28.5.f90 fails starting |a.28.5.f90 is invalid
|with r274551 |
Ever confirmed|0 |1
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The test case is "fixed". Removed regression marker. Somebody who
knows more about OMP than I do can figure out what this test is
actually testing, and how to make it valid (if that is possible).
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Subject: [Bug fortran/91390] treatment of extra parameter in a subroutine call
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Bug 91390 depends on bug 91443, which changed state.
Bug 91443 Summary: -Wargument-mismatch does not catch mismatch for global procedure
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91443
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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----------------------------------------------------------------------------
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk.
Next step: PR 91390.
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Subject: [Bug fortran/40976] Merge DECL of procedure call with DECL of gfc_get_function_type
Date: Sat, 17 Aug 2019 12:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40976
Bug 40976 depends on bug 91443, which changed state.
Bug 91443 Summary: -Wargument-mismatch does not catch mismatch for global procedure
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91443
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
Date: Sat, 17 Aug 2019 13:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91471
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sat, Aug 17, 2019 at 08:04:23AM +0000, SameeranJayant.Joshi at amd dot com
wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91471
>
> --- Comment #2 from Sameeran Joshi <SameeranJayant.Joshi at amd dot com> ---
> (In reply to kargl from comment #1)
> > I have a patch that prevents the ICE. Remove ICE-on-valid-code
> > tag as the code is invalid.
>
> It fails when a value is assigned to the allocated space:
>
> program dynamic
> implicit none
> integer,dimension(:), allocatable :: x
> allocate(x(1))
> x(1) = 10
> stop x(1)
> end program dynamic
>
> Is above ICE-ON-INVALID code ?
> Can you please specify the reason?
> Thanks
>
The original code was invalid as you referenced x(1)
without assigning it a value, i.e., you referenced
an undefined variable. With the patch I will commit
later today, the above code gives
% gfcx -o z a.f90
troutmask:sgk[207] ./z
STOP 10
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Sat, 17 Aug 2019 14:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91347
--- Comment #11 from dave.anglin at bell dot net ---
On 2019-08-16 8:17 a.m., John David Anglin wrote:
> On 2019-08-16 5:47 a.m., ebotcazou at gcc dot gnu.org wrote:
>> Created attachment 46721
>> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46721&action=edit
>> Tentative fix
> Testing.
hppa-unknown-linux-gnu built successfully with change and there were no test
regressions:
https://gcc.gnu.org/ml/gcc-testresults/2019-08/msg01861.html
Looks good to me.
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Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
Date: Sat, 17 Aug 2019 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91471
--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 14:23:10 2019
New Revision: 274603
URL: https://gcc.gnu.org/viewcvs?rev=274603&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91471
* primary.c (gfc_variable_attr): Remove a gfc_internal_error(),
which cannot be reached by conforming Fortran code, but seems to
be reachable from nonconforming Fortran code. Treat the AR_UNKNOWN
case as a no-op.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91471
* gfortran.dg/pr91471.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr91471.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/primary.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78719] [F03] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1438
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 14:27:07 2019
New Revision: 274604
URL: https://gcc.gnu.org/viewcvs?rev=274604&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78719
* decl.c (get_proc_name): Check for a CLASS entity when trying to
add attributes to an entity that already has an explicit interface.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78719
* gfortran.dg/pr78719_1.f90: New test.
* gfortran.dg/pr78719_2.f90: Ditto.
* gfortran.dg/pr78719_3.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/pr78719_1.f90
trunk/gcc/testsuite/gfortran.dg/pr78719_2.f90
trunk/gcc/testsuite/gfortran.dg/pr78719_3.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78719] [F03] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1438
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
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Subject: [Bug fortran/78739] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1477
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78739
--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 14:39:51 2019
New Revision: 274605
URL: https://gcc.gnu.org/viewcvs?rev=274605&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78739
* match.c (gfc_match_st_function): When matching a statement function,
need to check if the statement function name shadows the function
name.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78739
* fortran.dg/pr78739.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr78739.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/match.c
trunk/gcc/testsuite/ChangeLog
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/91458] FAIL: g++.dg/tree-ssa/pr19807.C -std=gnu++98 scan-tree-dump-times optimized "&MEM\\\\[\\\\(void .\\\\)&a \\\\+ 8B\\\\]" 3
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--- Comment #6 from dave.anglin at bell dot net ---
On 2019-08-15 10:47 a.m., danglin at gcc dot gnu.org wrote:
> Similar fail:
> FAIL: g++.dg/tree-ssa/ssa-dse-1.C scan-tree-dump-times dse1
> "MEM\\\\[\\\\(struct FixBuf \\\\*\\\\)&<retval> \\\\+ [0-9]+B\\\\] = {}" 1
>
> Here we have:
> MEM <char[172]> [(struct FixBuf *)&<retval> + 28B] = {};
This test fails for the same reason as pr19807.C. I noticed this morning that
gcc.dg/tree-prof/stringop-2.c
also fails for same reason:
FAIL: gcc.dg/tree-prof/stringop-2.c scan-tree-dump optimized "MEM\\\\[\\\\(void
.\\\\)&a\\\\] = 168430090"
Here we have the following in optimized tree dump:
MEM <int> [(void *)&a] = 168430090;
>From gcc-bugs-return-651583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 15:55:35 2019
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Subject: [Bug lto/91478] New: FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g1 (test for excess errors)
Date: Sat, 17 Aug 2019 15:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91478
Bug ID: 91478
Summary: FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g1 (test for
excess errors)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: danglin at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa64-hp-hpux11.11
Executing on host: /test/gnu/gcc/objdir/gcc/xgcc -B/test/gnu/gcc/objdir/gcc/
/test/gnu/gcc/gcc/gcc/testsuite/gcc.dg/debug/pr41893-1.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -gdwarf-2 -g1 -flto -fwhole-program -O
/test/gnu/gcc/gcc/gcc/testsuite/gcc.dg/debug/pr41893-2.c -lm -o
pr41893-1.exe (timeout = 300)
spawn /test/gnu/gcc/objdir/gcc/xgcc -B/test/gnu/gcc/objdir/gcc/
/test/gnu/gcc/gcc/gcc/testsuite/gcc.dg/debug/pr41893-1.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -gdwarf-2 -g1 -flto -fwhole-program -O
/test/gnu/gcc/gcc/gcc/testsuite/gcc.dg/debug/pr41893-2.c -lm -o pr41893-1.exe
ld: Unsatisfied hidden symbol "". Symbol was referenced from file
/var/tmp//cc3R5QJu.debug.temp.o
ld: Unsatisfied hidden symbol "". Symbol was referenced from file
/var/tmp//cc3R5QJu.debug.temp.o
ld: Unsatisfied hidden symbol "". Symbol was referenced from file
/var/tmp//cc3R5QJu.debug.temp.o
ld: Unsatisfied hidden symbol "". Symbol was referenced from file
/var/tmp//ccCZBOzC.debug.temp.o
4 errors.
collect2: fatal error: ld returned 1 exit status
compilation terminated.
compiler exited with status 1
>From gcc-bugs-return-651584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 16:07:04 2019
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From: "dmatthews at utexas dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91479] New: Template deductions fails for static template member with default template parameter when inside template class
Date: Sat, 17 Aug 2019 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91479
Bug ID: 91479
Summary: Template deductions fails for static template member
with default template parameter when inside template
class
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dmatthews at utexas dot edu
Target Milestone: ---
This minimal program:
template <class T> struct foo
{
template <typename U, typename=void>
static void bar(const U&) {}
static void bar(int x) { bar<int>(x); }
};
causes the following error with gcc 9.x and 10.0, but not 8.3 or before
(clang/icpc also compile correctly):
<source>: In static member function 'static void foo<T>::bar(int)':
<source>:6:40: error: no matching function for call to 'foo<T>::bar<int>(int&)'
6 | static void bar(int x) { bar<int>(x); }
| ^
<source>:4:17: note: candidate: 'template<class T> template<class U, class>
static void foo<T>::bar(const U&)'
4 | static void bar(const U&) {}
| ^~~
<source>:4:17: note: template argument deduction/substitution failed:
<source>:6:40: note: mismatched types 'const U' and 'int'
6 | static void bar(int x) { bar<int>(x); }
|
Output of "gcc -v":
Using built-in specs.
COLLECT_GCC=/opt/compiler-explorer/gcc-snapshot/bin/g++
Target: x86_64-linux-gnu
Configured with: ../gcc-trunk-20190817/configure
--prefix=/opt/compiler-explorer/gcc-build/staging --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu --disable-bootstrap
--enable-multiarch --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --enable-clocale=gnu --enable-languages=c,c++,fortran,ada
--enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto
--enable-plugins --enable-threads=posix
--with-pkgversion=Compiler-Explorer-Build
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20190816 (experimental) (Compiler-Explorer-Build)
COLLECT_GCC_OPTIONS='-fdiagnostics-color=always' '-g' '-o' './output.s'
'-masm=intel' '-S' '-v' '-E' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/opt/compiler-explorer/gcc-trunk-20190817/bin/../libexec/gcc/x86_64-linux-gnu/10.0.0/cc1plus
-E -quiet -v -imultiarch x86_64-linux-gnu -iprefix
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/
-D_GNU_SOURCE <source> -o ./output.s -masm=intel -mtune=generic -march=x86-64
-fdiagnostics-color=always -g -fworking-directory
ignoring nonexistent directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0/x86_64-linux-gnu"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0/backward"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/include"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/include-fixed"
ignoring nonexistent directory
"/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0/x86_64-linux-gnu
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../include/c++/10.0.0/backward
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/include
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/include-fixed
/usr/local/include
/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/../../include
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COMPILER_PATH=/opt/compiler-explorer/gcc-trunk-20190817/bin/../libexec/gcc/x86_64-linux-gnu/10.0.0/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../libexec/gcc/x86_64-linux-gnu/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../libexec/gcc/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../x86_64-linux-gnu/bin/
LIBRARY_PATH=/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../../x86_64-linux-gnu/lib/:/opt/compiler-explorer/gcc-trunk-20190817/bin/../lib/gcc/x86_64-linux-gnu/10.0.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-fdiagnostics-color=always' '-g' '-o' './output.s'
'-masm=intel' '-S' '-v' '-E' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
>From gcc-bugs-return-651585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 16:11:54 2019
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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 lto/64636] Bootstrapping gcc-4.9.2 fails if lto is enabled
Date: Sat, 17 Aug 2019 16:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64636
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 #4 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
This looks very similar to the failure on linux-sparc64 with LTO enabled:
../../src/libiberty/strerror.c: In function 'strtoerrno':
../../src/libiberty/strerror.c:773:1: warning:
'/<<PKGBUILDDIR>>/build/libiberty/strerror.gcda' profile count data file not
found [-Wmissing-profile]
773 | }
| ^
../../src/libiberty/strsignal.c: In function 'strtosigno':
../../src/libiberty/strsignal.c:536:1: warning:
'/<<PKGBUILDDIR>>/build/libiberty/strsignal.gcda' profile count data file not
found [-Wmissing-profile]
536 | }
| ^
during IPA pass: pure-const
../../src/libiberty/simple-object.c: In function
'simple_object_write_add_data':
../../src/libiberty/simple-object.c:565:1: internal compiler error: in
stream_out_histogram_value, at value-prof.c:369
565 | }
| ^
if [ x"" != x ]; then \
/<<PKGBUILDDIR>>/build/./prev-gcc/xgcc -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/sparc64-linux-gnu/bin/ -B/usr/sparc64-linux-gnu/bin/
-B/usr/sparc64-linux-gnu/lib/ -isystem /usr/sparc64-linux-gnu/include -isystem
/usr/sparc64-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-c -DHAVE_CONFIG_H -g -O2 -fprofile-use -flto=jobserver -I.
-I../../src/libiberty/../include -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -Wshadow=local -pedantic -D_GNU_SOURCE -fPIC
../../src/libiberty/simple-object-elf.c -o noasan/simple-object-elf.o; \
else true; fi
/<<PKGBUILDDIR>>/build/./prev-gcc/xgcc -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/sparc64-linux-gnu/bin/ -B/usr/sparc64-linux-gnu/bin/
-B/usr/sparc64-linux-gnu/lib/ -isystem /usr/sparc64-linux-gnu/include -isystem
/usr/sparc64-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-c -DHAVE_CONFIG_H -g -O2 -fprofile-use -flto=jobserver -I.
-I../../src/libiberty/../include -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -Wshadow=local -pedantic -D_GNU_SOURCE
../../src/libiberty/simple-object-elf.c -o simple-object-elf.o
../../src/libiberty/cp-demangle.c: In function 'd_print_cast.isra.0':
../../src/libiberty/cp-demangle.c:6648:1: warning:
'/<<PKGBUILDDIR>>/build/libiberty/pic/cp-demangle.gcda' profile count data file
not found [-Wmissing-profile]
6648 | }
| ^
../../src/libiberty/regex.c: In function 'xregfree':
../../src/libiberty/regex.c:8131:1: warning:
'/<<PKGBUILDDIR>>/build/libiberty/pic/regex.gcda' profile count data file not
found [-Wmissing-profile]
8131 | }
| ^
configure: creating cache ./config.cache
checking build system type... sparc64-unknown-linux-gnu
checking host system type... sparc64-unknown-linux-gnu
checking target system type... sparc64-unknown-linux-gnu
checking whether /usr/bin/make sets $(MAKE)... if [ x"" != x ]; then \
/<<PKGBUILDDIR>>/build/./prev-gcc/xgcc -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/sparc64-linux-gnu/bin/ -B/usr/sparc64-linux-gnu/bin/
-B/usr/sparc64-linux-gnu/lib/ -isystem /usr/sparc64-linux-gnu/include -isystem
/usr/sparc64-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-c -DHAVE_CONFIG_H -g -O2 -fprofile-use -flto=jobserver -I.
-I../../src/libiberty/../include -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -Wshadow=local -pedantic -D_GNU_SOURCE -fPIC
../../src/libiberty/regex.c -o noasan/regex.o; \
else true; fi
/<<PKGBUILDDIR>>/build/./prev-gcc/xgcc -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/sparc64-linux-gnu/bin/ -B/usr/sparc64-linux-gnu/bin/
-B/usr/sparc64-linux-gnu/lib/ -isystem /usr/sparc64-linux-gnu/include -isystem
/usr/sparc64-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-c -DHAVE_CONFIG_H -g -O2 -fprofile-use -flto=jobserver -I.
-I../../src/libiberty/../include -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -Wshadow=local -pedantic -D_GNU_SOURCE
../../src/libiberty/regex.c -o regex.o
if [ x"" != x ]; then \
/<<PKGBUILDDIR>>/build/./prev-gcc/xgcc -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/sparc64-linux-gnu/bin/ -B/usr/sparc64-linux-gnu/bin/
-B/usr/sparc64-linux-gnu/lib/ -isystem /usr/sparc64-linux-gnu/include -isystem
/usr/sparc64-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-c -DHAVE_CONFIG_H -g -O2 -fprofile-use -flto=jobserver -I.
-I../../src/libiberty/../include -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -Wshadow=local -pedantic -D_GNU_SOURCE -fPIC
../../src/libiberty/cp-demangle.c -o noasan/cp-demangle.o; \
else true; fi
yes
checking for a BSD-compatible install... 0x9ab447
stream_out_histogram_value(output_block*, histogram_value_t*)
../../src/gcc/value-prof.c:369
/usr/bin/install -c
Full log in:
https://buildd.debian.org/status/fetch.php?pkg=gcc-9&arch=sparc64&ver=9.2.1-1&stamp=1565961822&raw=0
>From gcc-bugs-return-651586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 16:37:59 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/84877] Local stack copy of BLKmode parameter on the stack is not aligned when the requested alignment exceeds MAX_SUPPORTED_STACK_ALIGNMENT
Date: Sat, 17 Aug 2019 16:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84877
--- Comment #20 from dave.anglin at bell dot net ---
On 2019-07-08 6:04 a.m., amylaar at gcc dot gnu.org wrote:
> Created attachment 46577
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46577&action=edit
> patch for aligned stack - but clamping max alignment at
> MAX_SUPPORTED_STACK_ALIGNMENT
This patch fixes the failure of pr84877.c on hppa-unknown-linux-gnu.
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Subject: [Bug c++/90505] [9/10 Regression] g++ rejects a valid code
Date: Sat, 17 Aug 2019 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90505
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmatthews at utexas dot edu
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 91479 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/91479] Template deductions fails for static template member with default template parameter when inside template class
Date: Sat, 17 Aug 2019 17:11:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |mpolacek at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Thanks for the report. It is a dup 90505.
*** This bug has been marked as a duplicate of bug 90505 ***
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Subject: [Bug c++/90505] [9/10 Regression] g++ rejects a valid code
Date: Sat, 17 Aug 2019 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90505
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Test from 91479:
template <class T> struct foo
{
template <typename U, typename=void>
static void bar(const U&) {}
static void bar(int x) { bar<int>(x); }
};
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Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82992
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 17:15:42 2019
New Revision: 274608
URL: https://gcc.gnu.org/viewcvs?rev=274608&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/82992
* module.c (gfc_match_use): When renaming a module entity, search
current namespace for conflicting symbol.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/82992
* gfortran.dg/pr71649.f90: Adjust error messages.
* gfortran.dg/use_15.f90: Ditto.
* gfortran.dg/use_rename_8.f90: Ditto.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/module.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr71649.f90
trunk/gcc/testsuite/gfortran.dg/use_15.f90
trunk/gcc/testsuite/gfortran.dg/use_rename_8.f90
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Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82992
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 18:08:21 2019
New Revision: 274609
URL: https://gcc.gnu.org/viewcvs?rev=274609&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/82992
* module.c (gfc_match_use): When renaming a module entity, search
current namespace for conflicting symbol.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/82992
* gfortran.dg/pr71649.f90: Adjust error messages.
* gfortran.dg/use_15.f90: Ditto.
* gfortran.dg/use_rename_8.f90: Ditto.
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/module.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr71649.f90
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/use_15.f90
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/use_rename_8.f90
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Subject: [Bug fortran/78719] [F03] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1438
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78719
--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 18:11:58 2019
New Revision: 274610
URL: https://gcc.gnu.org/viewcvs?rev=274610&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78719
* decl.c (get_proc_name): Check for a CLASS entity when trying to
add attributes to an entity that already has an explicit interface.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78719
* gfortran.dg/pr78719_1.f90: New test.
* gfortran.dg/pr78719_2.f90: Ditto.
* gfortran.dg/pr78719_3.f90: Ditto.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr78719_1.f90
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr78719_2.f90
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr78719_3.f90
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/decl.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78739] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1477
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 18:14:26 2019
New Revision: 274611
URL: https://gcc.gnu.org/viewcvs?rev=274611&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78739
* match.c (gfc_match_st_function): When matching a statement function,
need to check if the statement function name shadows the function
name.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78739
* fortran.dg/pr78739.f90: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr78739.f90
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/match.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78719] [F03] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1438
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk and 9-branch. Thanks for bug report.
>From gcc-bugs-return-651594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 18:17:27 2019
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Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
Date: Sat, 17 Aug 2019 18:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91471
--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Aug 17 18:16:51 2019
New Revision: 274612
URL: https://gcc.gnu.org/viewcvs?rev=274612&root=gcc&view=rev
Log:
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91471
* primary.c (gfc_variable_attr): Remove a gfc_internal_error(),
which cannot be reached by conforming Fortran code, but seems to
be reachable from nonconforming Fortran code. Treat the AR_UNKNOWN
case as a no-op.
2019-08-17 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91471
* gfortran.dg/pr91471.f90: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr91471.f90
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/primary.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/91471] f951: internal compiler error: gfc_variable_attr(): Bad array reference
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kargl at gcc dot gnu.org changed:
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--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk and 9-branch. Thanks for bug report.
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Subject: [Bug fortran/78739] ICE in gfc_get_symbol_decl, at fortran/trans-decl.c:1477
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed on trunk and 9-branch. Thanks for bug report.
>From gcc-bugs-return-651598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 18:20:18 2019
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Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #9 from kargl at gcc dot gnu.org ---
Fixed on trunk and 9-branch. Thanks for bug report.
>From gcc-bugs-return-651600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 18:25:22 2019
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
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Bug 82173 depends on bug 89413, which changed state.
Bug 89413 Summary: [PDT] ICE in resolve_fl_derived, at fortran/resolve.c:14392
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89413
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Subject: [Bug fortran/89413] [PDT] ICE in resolve_fl_derived, at fortran/resolve.c:14392
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #3)
> This seems to have been fixed by Janus in r269658.
> Perhaps, this can be closed.
>
> gfcx -c a.f90
> a.f90:2:15:
>
> 2 | type :: t5 ()
> | 1
> Error: A type parameter list is required at (1)
Cloasing as fixed.
>From gcc-bugs-return-651601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Aug 17 19:12:43 2019
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From: "frankhb1989 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/91480] New: Nonconforming definitions of standard library feature-test macros
Date: Sat, 17 Aug 2019 19:12:00 -0000
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Bug ID: 91480
Summary: Nonconforming definitions of standard library
feature-test macros
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
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Target Milestone: ---
These macros are lacking of the `L` suffix compared to the content of the table
in [support.limits.general]. This can lead to some unexpected effects on
observable behavior, e.g.:
#include <string>
#include <iostream>
#define macro_as_string(x) #x
#define stringized_length(x) std::string(macro_as_string(x)).size()
int main()
{
std::cout << stringized_length(__cpp_lib_nonmember_container_access);
}
Also, in <bits/allocator.h>, `__cpp_lib_allocator_traits_is_always_equal` is
wrongly spelled as `__cpp_lib_allocator_is_always_equal`.
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Subject: [Bug fortran/91426] Different colors for errors with multiple locations
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Having had occasion to look at a few hundred multi-line error messages
today, I have now changed my mind on what I would consider best :-)
I now think different colors for primary and secondary error message
(if we stick with a maximum of two) is actually quite good.
What would help a lot if the markers (1) and (2) in
Error: Duplicate statement label 10 at (1) and (2)
were also colored the same as the two markers under the
text of the program.
Would this be doable / would others also find that useful?
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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=49474
--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #6)
> -Wlogical-not-parentheses is in, but I'm not marking this as fixed yet as we
> don't warn for #c2. Maybe I will look at it, but unassigning for now.
What flag should the case in comment 2 go under? -Wtype-limits? -Wbool-compare?
-Wtautological-compare? Something else?
>From gcc-bugs-return-651604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 04:35:04 2019
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Subject: [Bug tree-optimization/18487] Warnings for pure and const functions that are not actually pure or const
Date: Sun, 18 Aug 2019 04:35:00 -0000
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--- Comment #19 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Dávid Bolvanský from comment #18)
> a.c
>
> int foo(void) __attribute__((const));
>
>
> int main(void) {
> return foo();
> }
>
> b.c
>
> #include <stdio.h>
>
> int foo(void) {
> puts("BUM");
> return 0;
> }
>
> gcc a.c b.c -Wall -Wextra -flto -o bum
>
>
> It would be nice to get a warning.
The LTO case would probably be tougher to get right than the simple case...
>From gcc-bugs-return-651605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 09:46:17 2019
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Dmitry G. Dyachenko <dimhen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dimhen at gmail dot com
--- Comment #23 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
sounds like gcc10 r274581 optimize c#3 and c#4
c#3 gcc -O -S x.c
f:
.LFB0:
.cfi_startproc
leal 2(%rdi,%rdi), %eax
ret
.cfi_endproc
c#4 gcc -O -S y.c
m:
.LFB0:
.cfi_startproc
movl $0, %eax
ret
.cfi_endproc
$ /usr/local/gcc_current/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-offload-targets=nvptx-none
--without-cuda-driver --enable-gnu-indirect-function --with-tune=native
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.0 20190816 (experimental) [trunk revision 274581] (GCC)
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Subject: [Bug fortran/91390] treatment of extra parameter in a subroutine call
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tschwinge at gcc dot gnu.org
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I'm currently working on this... finding a lot of interesting
cases in the test suite, in particular one where I am not sure
what to do.
The test case is gfortran.dg/goacc/acc_on_device-1.f95 , and the code is
! Have to enable optimizations, as otherwise builtins won't be expanded.
! { dg-additional-options "-O -fdump-rtl-expand" }
logical function f ()
implicit none
external acc_on_device
logical (4) acc_on_device
f = .false.
f = f .or. acc_on_device ()
f = f .or. acc_on_device (1, 2)
f = f .or. acc_on_device (3.14)
f = f .or. acc_on_device ("hello")
return
end function f
! Unsuitable to be handled as a builtin, so we're expecting four calls.
! { dg-final { scan-rtl-dump-times "\\\(call \[^\\n\]* acc_on_device" 4
"expand" } }
With my current patch, this would result in
/home/ig25/Gcc/trunk/gcc/testsuite/gfortran.dg/goacc/acc_on_device-1.f95:12:12:
11 | f = f .or. acc_on_device ()
| 2
12 | f = f .or. acc_on_device (1, 2)
| 1
Error: More actual than formal arguments in procedure call at (1) for procedure
defined at (2)
/home/ig25/Gcc/trunk/gcc/testsuite/gfortran.dg/goacc/acc_on_device-1.f95:13:12:
11 | f = f .or. acc_on_device ()
| 2
12 | f = f .or. acc_on_device (1, 2)
13 | f = f .or. acc_on_device (3.14)
| 1
Error: More actual than formal arguments in procedure call at (1) for procedure
defined at (2)
/home/ig25/Gcc/trunk/gcc/testsuite/gfortran.dg/goacc/acc_on_device-1.f95:14:12:
11 | f = f .or. acc_on_device ()
| 2
......
14 | f = f .or. acc_on_device ("hello")
| 1
Error: More actual than formal arguments in procedure call at (1) for procedure
defined at (2)
where the warnings could be mitigated to a warning using -std=legacy.
Now, needless to say, this is illegal Fortran. Is the test case actually
a valid use case? Wouldn't it be better to make this into an intrinsic
with -fopenacc? Would it be acceptable to have to set -std=legacy on that
particular use case?
>From gcc-bugs-return-651607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 09:57:45 2019
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Subject: [Bug tree-optimization/37242] missed FRE opportunity because of signedness of addition
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--- Comment #24 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
r257061 optimize too
gcc version 8.0.1 20180125 (experimental) [trunk revision 257061] (GCC)
>From gcc-bugs-return-651608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 10:38:01 2019
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Subject: [Bug libstdc++/91480] Nonconforming definitions of standard library feature-test macros
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-08-18
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The original macros in the Library Fundamentals TS were ints not longs, which
is why some started that way. I've been gradually fixing them, but it's very,
very low priority. Your example doesn't seem very realistic.
The allocator traits one is a bug though.
>From gcc-bugs-return-651609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 12:03:16 2019
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Subject: [Bug fortran/91390] treatment of extra parameter in a subroutine call
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 46724
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46724&action=edit
Something that sort of works...
and also extends the error message with a reference to where the
mismatching procedure is defined.
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From: "lloyd at randombit dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/91481] New: POWER9 "DARN" RNG intrinsic produces repeated output
Date: Sun, 18 Aug 2019 14:41:00 -0000
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Bug ID: 91481
Summary: POWER9 "DARN" RNG intrinsic produces repeated output
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: lloyd at randombit dot net
Target Milestone: ---
The POWER9 ISA includes a hardware random number generator "DARN" which is
similar to x86 RDRAND/RDSEED. Using the GCC intrinsics and *any optimization
level* then `__builtin_darn()` and `__builtin_darn_raw()` produce repeated
output:
$ cat darn.c
#include <stdio.h>
#include <stdint.h>
int main()
{
uint64_t darn[32];
for(size_t i = 0; i != 32; ++i)
darn[i] = __builtin_darn(); // or __builtin_darn_raw()
for(size_t i = 0; i != 32; ++i)
printf("%016lX\n", darn[i]);
}
$ $HOME/opt/bin/powerpc64le-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/home/lloyd/opt/bin/powerpc64le-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/home/lloyd/opt/libexec/gcc/powerpc64le-unknown-linux-gnu/9.2.0/lto-wrapper
Target: powerpc64le-unknown-linux-gnu
Configured with: ../gcc-9.2.0/configure --prefix=/home/lloyd/opt
--enable-languages=c,c++
Thread model: posix
gcc version 9.2.0 (GCC)
$ $HOME/opt/bin/powerpc64le-unknown-linux-gnu-gcc -mcpu=power9 -O -m64 darn.c
-o darn
$ ./darn
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
32A7727F89101CF3
...
The binary produces a unique value each time it is executed, but the same value
repeats. If no optimization is used, then different values are produced. Since
these instructions are supposed to be used to seed cryptographic random number
generators, this is quite bad. I don't know PPC asm but my read of the
generated code when optimizations are enabled is that `darn` is invoked just
once and then the value is placed repeatedly into the array - maybe GCC has not
been taught that this instruction is volatile and produces a different output
each time it is used?
Originally observed with "gcc version 8.3.1 20190304 (Advance-Toolchain-at12.0)
[revision 269374] (GCC)" on gcc135, same behavior with stock GCC 9.2.0.
I don't think there is an issue with the hardware; if using inline asm instead
of the intrinsics, everything seems to work as expected.
>From gcc-bugs-return-651611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 15:00:37 2019
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From: "msharov at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/91482] New: __builtin_assume_aligned should not break write combining
Date: Sun, 18 Aug 2019 15:00:00 -0000
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Bug ID: 91482
Summary: __builtin_assume_aligned should not break write
combining
Product: gcc
Version: 9.1.0
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Priority: P3
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void write64 (void* p)
{
unsigned* p1 = (unsigned*) __builtin_assume_aligned (p, 8);
*p1++ = 0;
unsigned* p2 = (unsigned*) __builtin_assume_aligned (p1, 4);
*p2++ = 1;
}
When the two stores are written without __builtin_assume_aligned, they are
coalesced into a single movq store. The code above, however, results in two
movl stores, even though the new information provided by
__builtin_assume_aligned does not prevent combination.
>From gcc-bugs-return-651612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 15:10:02 2019
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Subject: [Bug c++/91483] New: Poor diagnostic on trying to take constexpr reference to non-static object
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Bug ID: 91483
Summary: Poor diagnostic on trying to take constexpr reference
to non-static object
Product: gcc
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Consider:
struct X {
int const& var;
};
void foo() {
constexpr int i = 42;
constexpr X x{i};
}
This is ill-formed because i doesn't have static storage duration. But the
error gcc provides is:
<source>: In function 'void foo()':
<source>:7:20: error: 'const X{i}' is not a constant expression
7 | constexpr X x{i};
| ^
It would be a lot nicer if the diagnostic here explained the reason that this
isn't a constant expression.
>From gcc-bugs-return-651613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 15:12:57 2019
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Subject: [Bug c++/91483] Poor diagnostic on trying to take constexpr reference to non-static object
Date: Sun, 18 Aug 2019 15:12:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-08-18
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Yup, that's true. I'll add it onto my list.
>From gcc-bugs-return-651614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 15:47:58 2019
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Subject: [Bug c++/91484] New: Error message: std::is_constructible with incomplete types.
Date: Sun, 18 Aug 2019 15:47:00 -0000
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Bug ID: 91484
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https://godbolt.org/z/BGkt7T
https://godbolt.org/z/EyDV9s
GCC correctly(i suppose) reports UB in the first example, but not in the second
one.
Real-life example:
https://godbolt.org/z/gSkmMW
>From gcc-bugs-return-651615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 16:22:13 2019
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Subject: [Bug libstdc++/91480] Nonconforming definitions of standard library feature-test macros
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--- Comment #2 from frankhb1989 at gmail dot com ---
I agree the problem of 'L' is not likely found as a real issue in practice.
Perhaps this could be forwarded as an issue of the standard which requires
overspecified definitions. I don't find any intentional use cases about relying
on the exactly specified type. (Despite the range limitation of int, the macro
expansion results can be specified as "integer literal equal to the
corresponding numerical values specified in the table" and a note about
intentionally unspecified types.)
>From gcc-bugs-return-651616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 16:52:39 2019
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Subject: [Bug target/91472] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
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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> ---
We need a reproducer (or at least instructions to reproduce).
>From gcc-bugs-return-651617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 17:57:54 2019
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91472] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
Date: Sun, 18 Aug 2019 17:57:00 -0000
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--- Comment #3 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
It can reproduced by simply cloning the gmp repo, building it and running the
testsuite:
$ hg clone https://gmplib.org/repo/gmp
$ cd gmp
$ ./.bootstrap && ./configure --enable-cxx --enable-fat --build
sparc64-linux-gnu && make -j32 && make check
Switching gcc versions can be achieved by just setting the CC variable, e.g.:
$ export CC=gcc-8
>From gcc-bugs-return-651618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 18:01:15 2019
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/64636] Bootstrapping gcc-4.9.2 fails if lto is enabled
Date: Sun, 18 Aug 2019 18:01:00 -0000
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--- Comment #5 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
I can confirm that disabling LTO on sparc64 makes gcc build fine.
>From gcc-bugs-return-651619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 18:29:52 2019
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Subject: [Bug target/91472] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
Date: Sun, 18 Aug 2019 18:29:00 -0000
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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> ---
I can reproduce the SEGV with the gmp-6.1.2 release tarball and gcc-8.3 on
sparc64-linux, making either a 32-bit or a 64-bit build of gmp, using gmp's
defaults (not overriding CC or CFLAGS).
>From gcc-bugs-return-651620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 18:42:14 2019
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Subject: [Bug target/91472] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
OK, I can reproduce, thanks.
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Subject: [Bug target/83531] Build broken on macOS 10.13.2
Date: Sun, 18 Aug 2019 18:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83531
--- Comment #11 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Sun Aug 18 18:54:13 2019
New Revision: 274624
URL: https://gcc.gnu.org/viewcvs?rev=274624&root=gcc&view=rev
Log:
[Darwin, fixincludes] Fix PR83531
There is no reasonable chance that the SDKs in question will be re-
issued, so the only viable solution is a fixincludes.
2019-08-18 C.G. Dogan <gcc+cgdogan.00@gmail.com>
Iain Sandoe <iain@sandoe.co.uk>
PR target/83531
* inclhack.def (darwin_api_availability): New, strip leading
underscores from API_XXXX defines.
* fixincl.x: Regenerate.
* tests/base/os/availability.h: New file.
Added:
trunk/fixincludes/tests/base/os/availability.h
Modified:
trunk/fixincludes/ChangeLog
trunk/fixincludes/fixincl.x
trunk/fixincludes/inclhack.def
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Subject: [Bug target/83531] Build broken on macOS 10.13.2
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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--- Comment #12 from Iain Sandoe <iains at gcc dot gnu.org> ---
so fixed for trunk so far.
>From gcc-bugs-return-651623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 19:12:10 2019
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Subject: [Bug sanitizer/87880] [9 regression] All macOS asan execution tests FAIL
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--- Comment #15 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Sun Aug 18 19:11:29 2019
New Revision: 274625
URL: https://gcc.gnu.org/viewcvs?rev=274625&root=gcc&view=rev
Log:
Darwin, libsanitizer - remove reference to __cxa_rethrow_primary_exception.
For some Darwin versions the absence of the rethrow_primary_exception
symbol causes almost all sanitizer tests to fail.
The symbol is not present in libstdc++ and, therefore is is correct to
remove the reference to it for all platforms. We do this by adding a
new guard "ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION".
For the backported version, to avoid bumping the library version, this
is only applied for Darwin (because of the way that symbol interposing
works on Darwin, this does not alter the exported symbols list).
libsanitizer/
2019-08-18 Iain Sandoe <iain@sandoe.co.uk>
Backport from mainline
2019-06-18 Iain Sandoe <iain@sandoe.co.uk>
PR libsanitizer/87880
* asan/asan_interceptors.h:
(ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION): New.
* asan/Makefile.am (DEFS): Add (for Darwin only)
ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION, defined to 0.
* asan/Makefile.in: Regenerated.
Modified:
branches/gcc-9-branch/libsanitizer/ChangeLog
branches/gcc-9-branch/libsanitizer/asan/Makefile.am
branches/gcc-9-branch/libsanitizer/asan/Makefile.in
branches/gcc-9-branch/libsanitizer/asan/asan_interceptors.h
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Subject: [Bug sanitizer/87880] [9 regression] All macOS asan execution tests FAIL
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> ---
fixed for 9.3
>From gcc-bugs-return-651625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 20:11:47 2019
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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/91485] New: [10 Regression] Erroneous conflict between variable x and operator(.x.)
Date: Sun, 18 Aug 2019 20:11:00 -0000
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Bug ID: 91485
Summary: [10 Regression] Erroneous conflict between variable x
and operator(.x.)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: anlauf at gcc dot gnu.org
Target Milestone: ---
Created attachment 46725
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46725&action=edit
Minimal reproducer
The attached valid code suddenly fails with current 10-trunk:
gfcbug155.f90:23:26:
23 | subroutine print_prod (x, y)
| 1
24 | use foo, only: cartesian, operator(.x.)
| 2
Error: Symbol 'x' at (1) conflicts with the symbol at (2)
gfcbug155.f90:26:19:
26 | type(cartesian), intent(in) :: x, y
| 1
Error: Derived type 'cartesian' at (1) is being used before it is defined
gfcbug155.f90:23:26:
23 | subroutine print_prod (x, y)
| 1
Error: Symbol 'x' at (1) has no IMPLICIT type
gfcbug155.f90:23:29:
23 | subroutine print_prod (x, y)
| 1
Error: Symbol 'y' at (1) has no IMPLICIT type
The regression is most likely introduced in the last 2 days.
Note that it is important that the USE statement is placed in the contained
subroutine, not at module level.
>From gcc-bugs-return-651626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 18 22:22:48 2019
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Subject: [Bug fortran/91390] treatment of extra parameter in a subroutine call
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 46726
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46726&action=edit
Much better patch
It a) does not try to do two things at once, and b) has passed
regression-testing at least once.
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Subject: [Bug libstdc++/91486] New: future::wait_for and shared_timed_mutex::wait_for do not work properly with float duration
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91486
Bug ID: 91486
Summary: future::wait_for and shared_timed_mutex::wait_for do
not work properly with float duration
Product: gcc
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Subject: [Bug libstdc++/91486] future::wait_for and shared_timed_mutex::wait_for do not work properly with float duration
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--- Comment #1 from John Salmon <john.salmon at deshaw dot com> ---
Created attachment 46727
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46727&action=edit
demonstration code
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Subject: [Bug libstdc++/91486] future::wait_for and shared_timed_mutex::wait_for do not work properly with float duration
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--- Comment #2 from John Salmon <john.salmon at deshaw dot com> ---
The same incorrect logic that was fixed in bug 68519 is present in the
implementations of future::wait_for and shared_timed_mutex::wait_for. The fix
should be the same: explicitly duration_cast the __rtime argument to
__clock::duration before adding to __clock::now(). Fixes are required in
shared_mutex and bits/atomic_futex.h.
The attached code demonstrates the problem. wait_for either waits too long or
too short. Output is:
drdws0134$ garden with -m gcc/8.1.0-01c7/bin g++ -std=c++14 futurewait.cpp
-pthread && ./a.out
ERROR - future::wait_for took too short: t1 looping: 0 milliseconds
0 second
t2 looping: 0 second
ERROR - shared_timed_mutex::try_lock_shared took too short: 0 milliseconds
t2 looping: 1 second
t1 looping: 1 second
t2 looping: 2 second
t1 looping: 2 second
t2 looping: 3 second
t1 looping: 3 second
t2 looping: 4 second
t1 looping: 4 second
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Subject: [Bug fortran/91485] [10 Regression] Erroneous conflict between variable x and operator(.x.)
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>From gcc-bugs-return-651631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 01:39:48 2019
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Subject: [Bug c++/91487] New: [concepts] alias constraint not respected
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Summary: [concepts] alias constraint not respected
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The following should fail to compile since it doesn't pass the only_int
constraint.
https://godbolt.org/z/HrB1wz (gcc version 10.0.0 20190817)
#include <type_traits>
template<typename T>
requires std::is_same_v<int, T>
using only_int = T;
template<typename T>
using forward = only_int<T>;
int main()
{
forward<float> f;
}
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Subject: [Bug target/80834] PowerPC gcc -mcpu=power9 seems to turn off vectorization that -mcpu=power8 enables
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Li Jia He <helijia at gcc dot gnu.org> changed:
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--- Comment #4 from Li Jia He <helijia at gcc dot gnu.org> ---
This question may not be as complicated as described. May only have a more
important relationship with the setting of the vect-cost-model value
(rs6000_builtin_vectorization_cost). And it has been vectorized on the current
trunk(subversion id 274560).
If we use the code that mike said(subversion id 248266), and compile option is
```
-mcpu=power9 -O3 -ffast-math -fdump-tree-vect-details-all
-fdump-tree-slp-details-all
```
We can see the following analysis of vect-cost-model
```
m_amatvec.c:114:5: note: density 96%, cost 87 exceeds threshold, penalizing
loop body cost by 10%m_amatvec.c:114:5: note: Cost model analysis:
Vector inside of loop cost: 92
Vector prologue cost: 5
Vector epilogue cost: 36
Scalar iteration cost: 36
Scalar outside cost: 1
Vector outside cost: 41
prologue iterations: 0
epilogue iterations: 1
m_amatvec.c:114:5: note: cost model: the vector iteration cost = 92 divided by
the scalar iteration cost = 36 is greater or equal to the vectorization factor
= 2.
m_amatvec.c:114:5: note: not vectorized: vectorization not profitable.
m_amatvec.c:114:5: note: not vectorized: vector version will never be
profitable.
```
We can see that the value of ‘Vector inside of loop cost’ is 92, however (92 /
36 = 2) >= 2, which causes vect-cost-model to think that vector version will
never be profitable.
If we use the current trunk code(subversion id 274560), and compile option is
```
-mcpu=power9 -O3 -ffast-math -fdump-tree-vect-details-all
-fdump-tree-slp-details-all
```
We can see the following analysis of vect-cost-model
```
m_amatvec.c:114:5: note: Cost model analysis:
Vector inside of loop cost: 60
Vector prologue cost: 5
Vector epilogue cost: 36
Scalar iteration cost: 36
Scalar outside cost: 1
Vector outside cost: 41
prologue iterations: 0
epilogue iterations: 1
Calculated minimum iters for profitability: 2
m_amatvec.c:114:5: note: Runtime profitability threshold = 2
m_amatvec.c:114:5: note: Static estimate profitability threshold = 2
```
At this point, we can see that the value of 'Vector inside of loop cost' is 60.
At this time (60 / 36 = 1) < 2, we think that vectorization can be profitable
at this time.
‘Vector inside of loop cost’ value change consists of 2 parts
(1) The value of unaligned_store is reduced by ((3-1)*12)=24.
(2) rs6000_density_test value is reduced by 8.
The change in the unaligned_store partial value fixed by the following patch.
```
commit 01cabe21e4ecae1e9c53fe12d7c0aa654143a3d2
Author: pthaugen <pthaugen@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Oct 13 16:05:53 2017 +0000
* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost):
Remove
TARGET_P9_VECTOR code for unaligned_load case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@253731
138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fefac6e0c95..00be94fe349 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-13 Pat Haugen <pthaugen@us.ibm.com>
+
+ * config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Remove
+ TARGET_P9_VECTOR code for unaligned_load case.
+
2017-10-13 Jan Hubicka <hubicka@ucw.cz>
* cfghooks.c (verify_flow_info): Check that edge probabilities are
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index e6e254ac041..b08cd316e68 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -5419,9 +5419,6 @@ rs6000_builtin_vectorization_cost (enum
vect_cost_for_stmt type_of_cost,
return 3;
case unaligned_load:
- if (TARGET_P9_VECTOR)
- return 3;
-
if (TARGET_EFFICIENT_UNALIGNED_VSX)
return 1;
```
The analysis of the changes in the rs6000_density_test part of the data is as
follows:
As the code below, the density penalty fixup **depends on** the vec_cost.
```
if (density_pct > DENSITY_PCT_THRESHOLD
&& vec_cost + not_vec_cost > DENSITY_SIZE_THRESHOLD)
{
data->cost[vect_body] = vec_cost * (100 + DENSITY_PENALTY) / 100;
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"density %d%%, cost %d exceeds threshold, penalizing "
"loop body cost by %d%%", density_pct,
vec_cost + not_vec_cost, DENSITY_PENALTY);
}
```
With the commit 253731, the vec_cost is reduced by 24 as you mentioned, the
`vec_cost + not_vec_cost` is less than DENSITY_SIZE_THRESHOLD, so it's fine.
(btw, not_vec_cost can be calculated as 3 from the previous dump.)
By the way, if we use this option -fvect-cost-model=unlimited, with the
‘unlimited’ model the vectorized code-path is assumed to be profitable while
with the ‘dynamic’ model a runtime check guards the vectorized code-path to
enable it only for iteration counts that will likely execute faster than when
executing the original scalar loop.
Therefore, this issue has been resolved on the trunk.
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Subject: [Bug target/80834] PowerPC gcc -mcpu=power9 seems to turn off vectorization that -mcpu=power8 enables
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----------------------------------------------------------------------------
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--- Comment #5 from Li Jia He <helijia at gcc dot gnu.org> ---
This issue has been resolved on the trunk.
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Subject: [Bug fortran/91485] [10 Regression] Erroneous conflict between variable x and operator(.x.)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91485
--- Comment #1 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Aug 19 03:00:54 2019
New Revision: 274630
URL: https://gcc.gnu.org/viewcvs?rev=274630&root=gcc&view=rev
Log:
2019-08-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91485
module.c (gfc_match_use): User defined operator cannot conflict with
a rename symbol.
2019-08-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91485
* gfortran.dg/pr91485.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr91485.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/module.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/91488] New: [9/10 Regression] char_traits::length causes "inlining failed in call to always_inline" error with -fgnu-tm -O2 -std=c++17
Date: Mon, 19 Aug 2019 03:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91488
Bug ID: 91488
Summary: [9/10 Regression] char_traits::length causes "inlining
failed in call to always_inline" error with -fgnu-tm
-O2 -std=c++17
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rs2740 at gmail dot com
Target Milestone: ---
Repro (https://gcc.godbolt.org/z/RO-2Ec):
#include <string>
int main() {
auto z = std::char_traits<char>::length("");
}
$ g++ -fgnu-tm -O2 -std=c++17
In file included from
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/string:40,
from <source>:1:
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/bits/char_traits.h:
In static member function 'static constexpr std::size_t
std::char_traits<char>::length(const char_type*)':
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/bits/char_traits.h:231:5:
error: inlining failed in call to 'always_inline' 'constexpr bool
std::__constant_string_p(const _CharT*) [with _CharT = char]':
231 | __constant_string_p(const _CharT* __s)
| ^~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/bits/char_traits.h:332:25:
note: called from here
332 | if (__constant_string_p(__s))
| ~~~~~~~~~~~~~~~~~~~^~~~~
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/bits/char_traits.h:231:5:
error: inlining failed in call to 'always_inline' 'constexpr bool
std::__constant_string_p(const _CharT*) [with _CharT = char]':
231 | __constant_string_p(const _CharT* __s)
| ^~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-trunk-20190818/include/c++/10.0.0/bits/char_traits.h:332:25:
note: called from here
332 | if (__constant_string_p(__s))
| ~~~~~~~~~~~~~~~~~~~^~~~~
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Subject: [Bug fortran/91485] [10 Regression] Erroneous conflict between variable x and operator(.x.)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91485
--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Aug 19 03:21:46 2019
New Revision: 274632
URL: https://gcc.gnu.org/viewcvs?rev=274632&root=gcc&view=rev
Log:
2019-08-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91485
module.c (gfc_match_use): User defined operator cannot conflict with
a rename symbol.
2019-08-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/91485
* gfortran.dg/pr91485.f90: New test.
Added:
branches/gcc-9-branch/gcc/testsuite/gfortran.dg/pr91485.f90
Modified:
branches/gcc-9-branch/gcc/fortran/ChangeLog
branches/gcc-9-branch/gcc/fortran/module.c
branches/gcc-9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/91485] [10 Regression] Erroneous conflict between variable x and operator(.x.)
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |9.3
--- Comment #3 from kargl at gcc dot gnu.org ---
Fixed.
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Subject: [Bug target/91441] ICE in asan_shadow_offset at asan.c:342 on riscv64 target
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--- Comment #2 from kito at gcc dot gnu.org ---
Author: kito
Date: Mon Aug 19 03:21:44 2019
New Revision: 274631
URL: https://gcc.gnu.org/viewcvs?rev=274631&root=gcc&view=rev
Log:
PR target/91441 - Turn off -fsanitize=kernel-address if
TARGET_ASAN_SHADOW_OFFSET is not implemented.
- -fsanitize=kernel-address will call targetm.asan_shadow_offset ()
at asan_shadow_offset, so it will crash if TARGET_ASAN_SHADOW_OFFSET
is not implemented, that's mean -fsanitize=kernel-address is not
supported for target without TARGET_ASAN_SHADOW_OFFSET implementation.
gcc/ChangeLog:
PR target/91441
* toplev.c (process_options): Check TARGET_ASAN_SHADOW_OFFSET is
implemented for -fsanitize=kernel-address, and merge check logic
with -fsanitize=address.
testsuite/ChangeLog:
PR target/91441
* gcc.target/riscv/pr91441.c: New.
Added:
trunk/gcc/testsuite/gcc.target/riscv/pr91441.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/toplev.c
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Subject: [Bug fortran/91485] [10 Regression] Erroneous conflict between variable x and operator(.x.)
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from kargl at gcc dot gnu.org ---
Really close.
>From gcc-bugs-return-651640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 03:33:41 2019
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Subject: [Bug target/91441] ICE in asan_shadow_offset at asan.c:342 on riscv64 target
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kito at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |kito at gcc dot gnu.org
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--- Comment #3 from kito at gcc dot gnu.org ---
Fixed
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
See also https://xkcd.com/221/
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Subject: [Bug target/91472] [8/9/10 Regression] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91472
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |8.4
Summary|gmp testsuite segfaults |[8/9/10 Regression] gmp
|with gcc-8 and gcc-9, works |testsuite segfaults with
|fine with gcc-7 |gcc-8 and gcc-9, works fine
| |with gcc-7
>From gcc-bugs-return-651643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 06:49:14 2019
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Subject: [Bug c++/91476] [9/10 Regression] const reference variables sharing the same name in two anonymous namespaces cause a multiple definition error
Date: Mon, 19 Aug 2019 06:49:00 -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| |8.3.0
Keywords| |ABI, link-failure,
| |needs-bisection, wrong-code
Last reconfirmed| |2019-08-19
Ever confirmed|0 |1
Summary|const reference variables |[9/10 Regression] const
|sharing the same name in |reference variables sharing
|two anonymous namespaces |the same name in two
|cause a multiple definition |anonymous namespaces cause
|error |a multiple definition error
Target Milestone|--- |9.3
Known to fail| |9.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-651644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 06:50:12 2019
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Subject: [Bug c++/91477] error messages do not show column numbers for large source files
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is due to limitations in the encoding space for locations which causes us
to drop column numbers at some point.
>From gcc-bugs-return-651645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 06:51:31 2019
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Subject: [Bug lto/91478] FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g1 (test for excess errors)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |lto, needs-bisection
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Is this a new failure, thus can it be bisected somehow?
>From gcc-bugs-return-651646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 06:55:26 2019
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Subject: [Bug target/91481] POWER9 "DARN" RNG intrinsic produces repeated output
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |powerpc*
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Likely the builtins are wrongly declared const or pure. novops, leaf, nothrow
would be the correct choice here.
>From gcc-bugs-return-651647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 07:29:05 2019
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Subject: [Bug target/91472] [8/9/10 Regression] gmp testsuite segfaults with gcc-8 and gcc-9, works fine with gcc-7
Date: Mon, 19 Aug 2019 07:29:00 -0000
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I'll have a look.
>From gcc-bugs-return-651648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 07:37:31 2019
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Subject: [Bug tree-optimization/91482] __builtin_assume_aligned should not break write combining
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-08-19
Component|rtl-optimization |tree-optimization
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> ---
Confirmed. store-merging rejects it because we get rid of the
__builtin_assume_alinged only in fab.
>From gcc-bugs-return-651649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 07:39:02 2019
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Subject: [Bug libstdc++/91488] [9/10 Regression] char_traits::length causes "inlining failed in call to always_inline" error with -fgnu-tm -O2 -std=c++17
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----------------------------------------------------------------------------
Target Milestone|--- |9.4
>From gcc-bugs-return-651650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 08:35:18 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Mon, 19 Aug 2019 08:35:00 -0000
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--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> hppa-unknown-linux-gnu built successfully with change and there were no test
> regressions:
> https://gcc.gnu.org/ml/gcc-testresults/2019-08/msg01861.html
>
> Looks good to me.
OK, thanks. Can you check that the testcase to be attached is a valid
execution test for trunk when compiled with -O2 -fno-inline ?
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
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--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 46728
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46728&action=edit
Execution test
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Subject: [Bug tree-optimization/37242] missed FRE opportunity because of signedness of addition
Date: Mon, 19 Aug 2019 08:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think parts of this was fixed with the fix for PR45397 (r245752). I can't
really figure if the issue in the benchmark is fixed though. I still see
in PRE
<bb 3> [local count: 1014686024]:
# top_52 = PHI <top_36(D)(2), maxIdx_31(6)>
# maxIdx_54 = PHI <maxIdx_47(2), maxIdx_40(6)>
_4 = (long unsigned int) maxIdx_54;
_5 = _4 * 4;
_6 = numbers_37(D) + _5;
_7 = *_6;
_8 = _4 + 1;
_9 = _8 * 4;
_10 = numbers_37(D) + _9;
_11 = *_10;
if (_7 < _11)
goto <bb 4>; [50.00%]
else
goto <bb 5>; [50.00%]
<bb 4> [local count: 507343012]:
maxIdx_42 = maxIdx_54 + 1;
_68 = (long unsigned int) maxIdx_42;
_70 = _68 * 4;
_72 = numbers_37(D) + _70;
pretmp_74 = *_72;
suggesting it is not fixed in GCC 8 at least. Same with GCC 9 and trunk.
Testcase:
unsigned long a, b;
void foo (int m, int f)
{
unsigned long tem = (unsigned long)m;
a = tem + 1;
if (f)
{
int tem2 = m + 1;
b = (unsigned long)tem2;
}
}
note to value-number the expressions the same you need to apply knowledge
that in if (f), m + 1 cannot overflow.
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Subject: [Bug ada/65696] ASAN reports global-buffer-overrun for local tagged types
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--- Comment #3 from pmderodat at gcc dot gnu.org ---
Author: pmderodat
Date: Mon Aug 19 08:36:39 2019
New Revision: 274654
URL: https://gcc.gnu.org/viewcvs?rev=274654&root=gcc&view=rev
Log:
[Ada] Buffer reading overflow in dispatch table initialization
For tagged types not defined at library level that derive from library
level tagged types the compiler may generate code to initialize their
dispatch table of predefined primitives copying from the parent type
data stored in memory after the dispatch table of the parent; that is,
at runtime the initialization of dispatch tables overflows reading the
parent dispatch table.
This problem does not affect the execution of the program since the
target dispatch table always has enough space to store the extra data,
and after such copy the compiler generates code to complete the
initialization of the dispatch table.
The following test must compile and execute without errors.
package pkg_a is
type Root is tagged null record;
end pkg_a;
with pkg_a;
procedure main is
type Derived is new pkg_a.Root with null record; -- Test
begin
null;
end main;
Command: gnatmake -q main -fsanitize=address; ./main
2019-08-19 Javier Miranda <miranda@adacore.com>
gcc/ada/
PR ada/65696
* exp_atag.ads, exp_atag.adb (Build_Inherit_Predefined_Prims):
Adding formal to specify how many predefined primitives are
inherited from the parent type.
* exp_disp.adb (Number_Of_Predefined_Prims): New subprogram.
(Make_Secondary_DT): Compute the number of predefined primitives
of all tagged types (including tagged types not defined at
library level). Previously we unconditionally relied on the
Max_Predef_Prims constant value when building the dispatch
tables of tagged types not defined at library level (thus
consuming more memory for their dispatch tables than required).
(Make_DT): Compute the number of predefined primitives that must
be inherited from their parent type when building the dispatch
tables of tagged types not defined at library level. Previously
we unconditionally relied on the Max_Predef_Prims constant value
when building the dispatch tables of tagged types not defined at
library level (thus copying more data than required from the
parent type).
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/exp_atag.adb
trunk/gcc/ada/exp_atag.ads
trunk/gcc/ada/exp_disp.adb
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Mon, 19 Aug 2019 08:44:00 -0000
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--- Comment #14 from Sven Schnelle <svens at stackframe dot org> ---
I tested the patch with my (previously broken) kernel Build, and the issue
seems to be fixed. Thanks!
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Subject: [Bug tree-optimization/91403] GCC fails with ICE.
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so I have a patch to fix the recursion depth in SCEV analysis but then we
hit
the next one in SLSR, in my case because with -O0 there's no tailcall performed
but even with -O2 we don't tailcall it.
#8 0x0000000001fbb1d7 in replace_unconditional_candidate (c=0x200a1b60)
at /space/rguenther/src/svn/trunk2/gcc/gimple-ssa-strength-reduction.c:2223
#9 0x0000000001fbc47a in replace_uncond_cands_and_profitable_phis (
c=0x200a1b60)
at /space/rguenther/src/svn/trunk2/gcc/gimple-ssa-strength-reduction.c:2625
#10 0x0000000001fbc4bc in replace_uncond_cands_and_profitable_phis (
c=0x200a1ae0)
at /space/rguenther/src/svn/trunk2/gcc/gimple-ssa-strength-reduction.c:2631
...
#599120 0x0000000001fbc4bc in replace_uncond_cands_and_profitable_phis (
c=0x33ba1b0)
at /space/rguenther/src/svn/trunk2/gcc/gimple-ssa-strength-reduction.c:2631
2631 replace_uncond_cands_and_profitable_phis (lookup_cand
(c->dependent));
given the structure a worklist would be necessary to fix things there.
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
Date: Mon, 19 Aug 2019 10:50:00 -0000
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--- Comment #25 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sat, 17 Aug 2019, ubizjak at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91154
>
> --- Comment #24 from Uroš Bizjak <ubizjak at gmail dot com> ---
> It looks that the patch introduced a (small?) runtime regression of 5% in
> SPEC2000 300.twolf on haswell [1]. Maybe worth looking at.
Biggest changes when benchmarking -mno-stv (base) against -mstv (peak):
7.28% 37789 twolf_peak.none twolf_peak.none [.] ucxx2
4.21% 25709 twolf_base.none twolf_base.none [.] ucxx2
3.72% 22584 twolf_base.none twolf_base.none [.] new_dbox
2.48% 22364 twolf_peak.none twolf_peak.none [.] new_dbox
1.49% 8270 twolf_base.none twolf_base.none [.] sub_penal
1.12% 7576 twolf_peak.none twolf_peak.none [.] sub_penal
1.36% 9314 twolf_peak.none twolf_peak.none [.] old_assgnto_new2
1.11% 5257 twolf_base.none twolf_base.none [.] old_assgnto_new2
and in ucxx2 I see
0.17 │ mov %eax,(%rsp)
3.55 │ vpmins (%rsp),%xmm0,%xmm1
│ test %eax,%eax
0.22 │ vmovd %xmm1,%r8d
0.80 │ cmovs %esi,%r8d
This is from code like
a1LoBin = Trybin/binWidth < 0 ? 0 : (Trybin>numBins ? numBins : Trybin)
with only the inner one recognized as MIN because 'numBins' is only
ever loaded conditionally and we don't speculate it. So we expand
from
_41 = _40 / binWidth.15_36;
if (_41 >= 0)
goto <bb 5>; [59.00%]
else
goto <bb 6>; [41.00%]
bb5:
numBins.26_42 = numBins;
iftmp.19_315 = MIN_EXPR <_41, numBins.26_42>;
bb6:
# iftmp.19_267 = PHI <iftmp.19_315(5), 0(4)>
ending up with
movl %r9d, %eax
cltd
idivl %ecx
movl %eax, (%rsp)
vpminsd (%rsp), %xmm0, %xmm1
testl %eax, %eax
vmovd %xmm1, %r11d
cmovs %esi, %r11d
and STV converting single-instruction 'chains':
Collected chain #40...
insns: 381
defs to convert: r463, r465
Computing gain for chain #40...
Instruction gain 8 for 381: {r465:SI=smin(r463:SI,[`numBins']);clobber
flags:CC;}
REG_DEAD r463:SI
REG_UNUSED flags:CC
Instruction conversion gain: 8
Registers conversion cost: 4
Total gain: 4
Converting chain #40...
to me the "spill" to (%rsp) looks suspicious and even more so
the vector(!) memory use in vpminsd. RA could have used
movd %eax, %xmm1
vpminsd %xmm1, %xmm0, %xmm1
no? IRA allocates the pseudo to memory. Testcase:
extern int numBins;
extern int binOffst;
extern int binWidth;
extern int Trybin;
void foo (int);
void bar (int aleft, int axcenter)
{
int a1LoBin = (((Trybin=((axcenter + aleft)-binOffst)/binWidth)<0)
? 0 : ((Trybin>numBins) ? numBins : Trybin));
foo (a1LoBin);
}
STV had emitted
(insn 10 9 38 2 (parallel [
(set (reg:SI 93)
(div:SI (reg:SI 92)
...
(insn 38 10 12 2 (set (subreg:V4SI (reg:SI 98) 0)
(vec_merge:V4SI (vec_duplicate:V4SI (reg:SI 93))
(const_vector:V4SI [
(const_int 0 [0]) repeated x4
])
(const_int 1 [0x1]))) "t.c":9:56 -1
(nil))
...
(insn 39 31 32 2 (set (reg:SI 99)
(mem/c:SI (symbol_ref:DI ("numBins") [flags 0x40] <var_decl
0x7f9a4bfdbab0 numBins>) [1 numBins+0 S4 A32])) "t.c":9:75 -1
(nil))
(insn 32 39 37 2 (set (subreg:V4SI (reg:SI 95) 0)
(smin:V4SI (subreg:V4SI (reg:SI 98) 0)
(subreg:V4SI (reg:SI 99) 0))) "t.c":9:75 3657
{*sse4_1_sminv4si3}
(nil))
but then combine elimiated the copy...
Trying 38 -> 32:
38: r98:SI#0=vec_merge(vec_duplicate(r93:SI),const_vector,0x1)
32: r95:SI#0=smin(r98:SI#0,r99:SI#0)
REG_DEAD r99:SI
REG_DEAD r98:SI
Successfully matched this instruction:
(set (subreg:V4SI (reg:SI 95) 0)
(smin:V4SI (subreg:V4SI (reg:SI 93) 0)
(subreg:V4SI (reg:SI 99 [ numBins ]) 0)))
allowing combination of insns 38 and 32
original costs 4 + 40 = 44
replacement cost 40
...running into the issue I tried to fix with making the live-range
split copy more "explicit" ...
So it looks like STV "forgot" to convert 'reg:SI 99' which is
a memory load it split out. But even when fixing that combine
now forwards both ops, eliminating the LR split again :/
Disabling combine results in the expected variant (not going
through the stack):
idivl binWidth(%rip)
vmovd %eax, %xmm0
testl %eax, %eax
movl %eax, Trybin(%rip)
vpminsd %xmm1, %xmm0, %xmm0
vmovd %xmm0, %eax
cmovns %eax, %edi
jmp foo
so while
Index: gcc/config/i386/i386-features.c
===================================================================
--- gcc/config/i386/i386-features.c (revision 274666)
+++ gcc/config/i386/i386-features.c (working copy)
@@ -910,7 +910,9 @@ general_scalar_chain::convert_op (rtx *o
{
rtx tmp = gen_reg_rtx (GET_MODE (*op));
- emit_insn_before (gen_move_insn (tmp, *op), insn);
+ emit_insn_before (gen_rtx_SET (gen_rtx_SUBREG (vmode, tmp, 0),
+ gen_gpr_to_xmm_move_src (vmode,
*op)),
+ insn);
*op = gen_rtx_SUBREG (vmode, tmp, 0);
if (dump_file)
will help to fence off regprop it doesn't help against combines
power :/ (or IRAs failure to split live-ranges)
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Subject: [Bug c/91489] New: misplaced stack pointer when __ms_hook_prologue__ attribute is used
Date: Mon, 19 Aug 2019 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91489
Bug ID: 91489
Summary: misplaced stack pointer when __ms_hook_prologue__
attribute is used
Product: gcc
Version: 9.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gofmanp at gmail dot com
Target Milestone: ---
Created attachment 46729
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46729&action=edit
Preprocessed test program (gcc -v -save-temps -m32 -O2 ./file.c)
gcc -v:
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/9/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,d,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-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 9.1.1 20190503 (Red Hat 9.1.1-1) (GCC)
OS: Linux, Fedora 30 (x86_64)
The following test program crashes with SEGFAULT (on return from second call to
test_func()) when compiled as 'gcc -m32 -O2':
-----
#include <stdio.h>
unsigned int __attribute__ ((noinline)) __attribute__((__stdcall__))
__attribute__((__ms_hook_prologue__)) test_func( unsigned long *size )
{
static int once;
if (once++ == 0)
printf("(%p): stub\n", size);
return 1;
}
int main(int argc, char **argv)
{
printf("%#x.\n", test_func(NULL));
printf("%#x.\n", test_func(NULL));
}
----
The stack pointer is wrong in one of the code paths in test_func(). Here is the
snippet from 'objdump -d a.out':
----
80491e0: 8b ff mov %edi,%edi
80491e2: 55 push %ebp
80491e3: 8b ec mov %esp,%ebp
80491e5: a1 1c c0 04 08 mov 0x804c01c,%eax
80491ea: 8d 50 01 lea 0x1(%eax),%edx
80491ed: 89 15 1c c0 04 08 mov %edx,0x804c01c
80491f3: 85 c0 test %eax,%eax
80491f5: 74 09 je 8049200 <test_func+0x20>
80491f7: b8 01 00 00 00 mov $0x1,%eax
; the stack pointer is wrong here, need 'leave' or equivalent
80491fc: c2 04 00 ret $0x4
80491ff: 90 nop
8049200: 5d pop %ebp
8049201: 83 ec 14 sub $0x14,%esp
8049204: ff 74 24 18 pushl 0x18(%esp)
8049208: 68 0c a0 04 08 push $0x804a00c
804920d: e8 2e fe ff ff call 8049040 <printf@plt>
8049212: b8 01 00 00 00 mov $0x1,%eax
8049217: 83 c4 1c add $0x1c,%esp
804921a: c2 04 00 ret $0x4
----
The problem is not there without __attribute__((__ms_hook_prologue__)) (no
stack frame is generated in this case), or without -O2 compiler flag.
The problem originates from here: https://bugs.winehq.org/show_bug.cgi?id=47633
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
Date: Mon, 19 Aug 2019 11:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91154
--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is the powers of simplify_subreg I guess. We're lucky it doesn't do
this to arbitrary arithmetic.
So we need to really change all defs we introduce to vector modes instead of
making our live easy and using paradoxical subregs all over the place.
>From gcc-bugs-return-651659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 11:45:45 2019
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
Date: Mon, 19 Aug 2019 11:45:00 -0000
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--- Comment #27 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to rguenther@suse.de from comment #25)
> On Sat, 17 Aug 2019, ubizjak at gmail dot com wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91154
> >
> > --- Comment #24 from Uroš Bizjak <ubizjak at gmail dot com> ---
> > It looks that the patch introduced a (small?) runtime regression of 5% in
> > SPEC2000 300.twolf on haswell [1]. Maybe worth looking at.
>
> Biggest changes when benchmarking -mno-stv (base) against -mstv (peak):
>
> 7.28% 37789 twolf_peak.none twolf_peak.none [.] ucxx2
> 4.21% 25709 twolf_base.none twolf_base.none [.] ucxx2
> 3.72% 22584 twolf_base.none twolf_base.none [.] new_dbox
> 2.48% 22364 twolf_peak.none twolf_peak.none [.] new_dbox
> 1.49% 8270 twolf_base.none twolf_base.none [.] sub_penal
> 1.12% 7576 twolf_peak.none twolf_peak.none [.] sub_penal
> 1.36% 9314 twolf_peak.none twolf_peak.none [.]
> old_assgnto_new2
> 1.11% 5257 twolf_base.none twolf_base.none [.]
> old_assgnto_new2
>
> and in ucxx2 I see
>
> 0.17 │ mov %eax,(%rsp)
> 3.55 │ vpmins (%rsp),%xmm0,%xmm1
> │ test %eax,%eax
> 0.22 │ vmovd %xmm1,%r8d
> 0.80 │ cmovs %esi,%r8d
>
> This is from code like
>
> a1LoBin = Trybin/binWidth < 0 ? 0 : (Trybin>numBins ? numBins : Trybin)
>
> with only the inner one recognized as MIN because 'numBins' is only
> ever loaded conditionally and we don't speculate it. So we expand
> from
>
> _41 = _40 / binWidth.15_36;
> if (_41 >= 0)
> goto <bb 5>; [59.00%]
> else
> goto <bb 6>; [41.00%]
>
> bb5:
> numBins.26_42 = numBins;
> iftmp.19_315 = MIN_EXPR <_41, numBins.26_42>;
>
> bb6:
> # iftmp.19_267 = PHI <iftmp.19_315(5), 0(4)>
>
> ending up with
>
> movl %r9d, %eax
> cltd
> idivl %ecx
> movl %eax, (%rsp)
> vpminsd (%rsp), %xmm0, %xmm1
> testl %eax, %eax
> vmovd %xmm1, %r11d
> cmovs %esi, %r11d
>
> and STV converting single-instruction 'chains':
>
> Collected chain #40...
> insns: 381
> defs to convert: r463, r465
> Computing gain for chain #40...
> Instruction gain 8 for 381: {r465:SI=smin(r463:SI,[`numBins']);clobber
> flags:CC;}
> REG_DEAD r463:SI
> REG_UNUSED flags:CC
> Instruction conversion gain: 8
> Registers conversion cost: 4
> Total gain: 4
> Converting chain #40...
Is this in STV1 pass? This (pre-combine) pass should be enabled only for TImode
conversion, a semi-hack where 64bit targets convert memory access to TImode.
General STV should not be ran before combine.
> to me the "spill" to (%rsp) looks suspicious and even more so
> the vector(!) memory use in vpminsd. RA could have used
>
> movd %eax, %xmm1
> vpminsd %xmm1, %xmm0, %xmm1
>
> no? IRA allocates the pseudo to memory. Testcase:
This is how IRA handles subregs. Please note, that the memory is correctly
aligned, so vector load does not trip alignment trap. However, on x86 this
approach triggers store forwarding stall.
>From gcc-bugs-return-651660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 11:50:14 2019
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
Date: Mon, 19 Aug 2019 11:50:00 -0000
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--- Comment #28 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #26)
> This is the powers of simplify_subreg I guess. We're lucky it doesn't do
> this to arbitrary arithmetic.
>
> So we need to really change all defs we introduce to vector modes instead of
> making our live easy and using paradoxical subregs all over the place.
No, IMO IRA should be "fixed" to avoid stack temporary and (based on some cost
metric) use direct move for paradoxical subregs.
>From gcc-bugs-return-651661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 11:53:48 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
Date: Mon, 19 Aug 2019 11:53:00 -0000
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--- Comment #29 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #27)
> (In reply to rguenther@suse.de from comment #25)
> > and STV converting single-instruction 'chains':
> >
> > Collected chain #40...
> > insns: 381
> > defs to convert: r463, r465
> > Computing gain for chain #40...
> > Instruction gain 8 for 381: {r465:SI=smin(r463:SI,[`numBins']);clobber
> > flags:CC;}
> > REG_DEAD r463:SI
> > REG_UNUSED flags:CC
> > Instruction conversion gain: 8
> > Registers conversion cost: 4
> > Total gain: 4
> > Converting chain #40...
>
> Is this in STV1 pass? This (pre-combine) pass should be enabled only for
> TImode conversion, a semi-hack where 64bit targets convert memory access to
> TImode. General STV should not be ran before combine.
Yes, this is STV1. My patch to enable SImode and DImode chains didn't change
where the pass runs or enable the 2nd run out of compile-time concerns.
Indeed changing this fixes the issue. I'm going to benchmark it on
300.twolf.
> > to me the "spill" to (%rsp) looks suspicious and even more so
> > the vector(!) memory use in vpminsd. RA could have used
> >
> > movd %eax, %xmm1
> > vpminsd %xmm1, %xmm0, %xmm1
> >
> > no? IRA allocates the pseudo to memory. Testcase:
>
> This is how IRA handles subregs. Please note, that the memory is correctly
> aligned, so vector load does not trip alignment trap. However, on x86 this
> approach triggers store forwarding stall.
>From gcc-bugs-return-651662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 11:58:26 2019
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Subject: [Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized
Date: Mon, 19 Aug 2019 11:58:00 -0000
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--- Comment #15 from dave.anglin at bell dot net ---
On 2019-08-19 4:35 a.m., ebotcazou at gcc dot gnu.org wrote:
> OK, thanks. Can you check that the testcase to be attached is a valid
> execution test for trunk when compiled with -O2 -fno-inline ?
Yes. It aborts with current gcc-9.2.1 and passes with patched gcc-10.
-fno-inline is
needed.
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Subject: [Bug lto/91478] FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g1 (test for excess errors)
Date: Mon, 19 Aug 2019 12:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91478
--- Comment #2 from dave.anglin at bell dot net ---
On 2019-08-19 2:51 a.m., rguenth at gcc dot gnu.org wrote:
> Is this a new failure, thus can it be bisected somehow?
New. I can say at this point that r273635 was okay. There was a testsuite
problem with r274010
but it appears that it might have been okay as well.
>From gcc-bugs-return-651664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 19 12:18:12 2019
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Subject: [Bug rtl-optimization/91154] [10 Regression] 456.hmmer regression on Haswell caused by r272922
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--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #29)
> (In reply to Uroš Bizjak from comment #27)
> > (In reply to rguenther@suse.de from comment #25)
> > > and STV converting single-instruction 'chains':
> > >
> > > Collected chain #40...
> > > insns: 381
> > > defs to convert: r463, r465
> > > Computing gain for chain #40...
> > > Instruction gain 8 for 381: {r465:SI=smin(r463:SI,[`numBins']);clobber
> > > flags:CC;}
> > > REG_DEAD r463:SI
> > > REG_UNUSED flags:CC
> > > Instruction conversion gain: 8
> > > Registers conversion cost: 4
> > > Total gain: 4
> > > Converting chain #40...
> >
> > Is this in STV1 pass? This (pre-combine) pass should be enabled only for
> > TImode conversion, a semi-hack where 64bit targets convert memory access to
> > TImode. General STV should not be ran before combine.
>
> Yes, this is STV1. My patch to enable SImode and DImode chains didn't change
> where the pass runs or enable the 2nd run out of compile-time concerns.
>
> Indeed changing this fixes the issue. I'm going to benchmark it on
> 300.twolf.
Hmm, it regresses the gcc.target/i386/minmax-6.c though and thus cactusADM
(IIRC).
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Subject: asking for __attribute__((aligned()) clarification
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All,
this is my first post on these lists, so please bear with me.
My question is about gcc's __attribute__((aligned()). Please consider the following code:
#include <stdint.h>
typedef uint32_t uuint32_t __attribute__((aligned(1)));
uint32_t getuuint32(uint8_t p[]) {
return *(uuint32_t*)p;
}
This is meant to prevent gcc to produce hard faults/address errors on architectures that do not support unaligned access to shorts/ints (e.g some ARMs, some m68k). On these architectures, gcc is supposed to replace the 32 bit access with a series of 8 or 16 bit accesses.
I originally came from gcc 4.6.4 (yes, pretty old) where this did not work and gcc does not respect the aligned(1) attribute for its code generation (i.e. it generates a 'normal' pointer dereference, consequently crashing when the code executes). To be fair, it is my understanding that the gcc manuals never promised this *would* work.
As - at least as far as I can tell - documentation didn't really change regarding lowering alignment for variables and does not appear to say anything specific regarding pointer dereference on single, misaligned variables, I was pretty astonished to see this working on newer gcc versions (tried 6.2 and 7.4), however. gcc appears to even know the differences within an architecture (68000 generates a bytewise copy while ColdFire - that supports unaligned access - copies a 32 bit value).
My question: is this now intended behaviour we can rely on? If yes, can we have documentation upgraded to clearly state that this use case is valid?
Thank you.
Markus
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