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* [Bug fortran/82841] Segfault in gfc_simplify_transfer
[not found] <bug-82841-4@http.gcc.gnu.org/bugzilla/>
@ 2017-11-08 22:54 ` kargl at gcc dot gnu.org
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From: kargl at gcc dot gnu.org @ 2017-11-08 22:54 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82841
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82841] Segfault in gfc_simplify_transfer
Date: Wed, 08 Nov 2017 22:57:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Nov 8 22:56:58 2017
New Revision: 254555
URL: https://gcc.gnu.org/viewcvs?rev=254555&root=gcc&view=rev
Log:
2017-11-08 Steven G. Kargl <kargl@kgcc.gnu.org>
PR Fortran/82841
* simplify.c(gfc_simplify_transfer): Do not dereference a NULL pointer.
Unwrap a short line.
2017-11-08 Steven G. Kargl <kargl@kgcc.gnu.org>
PR Fortran/82841
* gfortran.dg/transfer_simplify_11.f90: new test.
Added:
trunk/gcc/testsuite/gfortran.dg/transfer_simplify_11.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
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From: "tydeman at tybor dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82909] New: Scope of type defined by offsetof() macro
Date: Wed, 08 Nov 2017 23:05:00 -0000
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Bug ID: 82909
Summary: Scope of type defined by offsetof() macro
Product: gcc
Version: unknown
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/*
* C standard appears to be unclear on scope of new type defined in
* offsetof() macro. Some compilers accept; some reject.
* This is related to C Defect Report 496.
*/
#include <stddef.h> /* offsetof() */
int main(void){
if( 0 == (int)offsetof( struct s4 {int i4;}, i4 ) ){
struct s4 s43; /* OK here */
}
{
struct s4 s44; /* Should(?) be OK here */
}
return 0;
}
>From gcc-bugs-return-581299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 08 23:43:27 2017
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82314] internal compiler error: in gfc_conv_expr_descriptor, at fortran/trans-array.c:6972
Date: Wed, 08 Nov 2017 23:43:00 -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 ---
(In reply to Dominique d'Humieres from comment #0)
> Compiling the following test (coming from pr55501)
>
> program testmerge3
> implicit none
> integer,parameter::iarray(merge(2,3,.true.)) = 1, i = size(iarray)
> print "(A,99I2)",'i,iarray =',i,iarray
> end program testmerge3
>
> gives the ICE
>
> pr55501_3.f90:4:0:
>
> print "(A,99I2)",'i,iarray =',i,iarray
>
> internal compiler error: in gfc_conv_expr_descriptor, at
> fortran/trans-array.c:6972
>
> (gcc_assert (ss != gfc_ss_terminator);).
If the code is changed to
program testmerge3
implicit none
integer, parameter :: j = merge(2,3,.true.)
integer, parameter :: iarray(j) = 1
integer, parameter :: i = size(iarray)
print "(A,99I2)",'i,iarray =', i, iarray
end program testmerge3
it compiles and runs. The problems appears to be that
when merge is in iarray, then array's shape is not properly
set. For my modified program, we have
(gdb) p *array
$4 = {expr_type = EXPR_VARIABLE, ts = {type = BT_INTEGER, kind = 4, u = {
derived = 0x0, cl = 0x0, pad = 0}, interface = 0x0, is_c_interop = 0,
is_iso_c = 0, f90_type = BT_UNKNOWN, deferred = false,
interop_kind = 0x0}, rank = 1, shape = 0x201e628c0, symtree = 0x201d58630,
for the original program
(gdb) p *array
$5 = {expr_type = EXPR_VARIABLE, ts = {type = BT_INTEGER, kind = 4, u = {
derived = 0x0, cl = 0x0, pad = 0}, interface = 0x0, is_c_interop = 0,
is_iso_c = 0, f90_type = BT_UNKNOWN, deferred = false,
interop_kind = 0x0}, rank = 1, shape = 0x0, symtree = 0x201d58630,
Not sure where the array->shape should be set.
>From gcc-bugs-return-581300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 08 23:55:43 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82909] Scope of type defined by offsetof() macro
Date: Wed, 08 Nov 2017 23:55:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Wed, 8 Nov 2017, tydeman at tybor dot com wrote:
> /*
> * C standard appears to be unclear on scope of new type defined in
> * offsetof() macro. Some compilers accept; some reject.
> * This is related to C Defect Report 496.
> */
>
> #include <stddef.h> /* offsetof() */
>
> int main(void){
>
> if( 0 == (int)offsetof( struct s4 {int i4;}, i4 ) ){
> struct s4 s43; /* OK here */
> }
> {
> struct s4 s44; /* Should(?) be OK here */
> }
This is accepted for -std=c89 (where selection statements don't introduce
block scopes) and rejected for -std=c99 and -std=c11 (where selection
statements do introduce block scopes; C11 6.8.4p3). I don't see a bug
here; what do you think should behave differently?
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Subject: [Bug c++/82910] New: marking data members private affects code generation of copying
Date: Thu, 09 Nov 2017 00:03:00 -0000
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Bug ID: 82910
Summary: marking data members private affects code generation
of copying
Product: gcc
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Consider the following piece of code:
struct pair
{
private:
void* first;
unsigned second;
};
struct other
{
pair get() const;
};
struct my
{
pair get(other const& other);
pair current;
pair* target;
};
pair my::get(other const& other)
{
*target = other.get();
return current;
}
For the function my::get() GCC generates the following (quite inefficient)
code:
my::get(other const&):
pushq %rbx
movq %rdi, %rbx
movq %rsi, %rdi
subq $16, %rsp
call other::get() const
movq 16(%rbx), %rcx
movq %rax, (%rsp)
movq %rdx, 8(%rsp)
movq %rax, (%rcx)
movl 8(%rsp), %eax
movl %eax, 8(%rcx)
movq (%rbx), %rax
movq 8(%rbx), %rdx
addq $16, %rsp
popq %rbx
ret
The expected generated code is:
my::get(other const&):
pushq %rbp
pushq %rbx
movq %rdi, %rbx
subq $8, %rsp
movq 16(%rdi), %rbp
movq %rsi, %rdi
call other::get() const
movq %rax, 0(%rbp) # just storing to *my::target...
movq %rdx, 8(%rbp)
movq (%rbx), %rax # ... and then loading my::current
movq 8(%rbx), %rdx
addq $8, %rsp
popq %rbx
popq %rbp
ret
The issue can be worked around. One way to do this is to make the data members
of pair public. Another way is changing pair::second type to unsigned long (to
match the size of pointer).
It would be great is GCC generates the second code irrespectively of
private-ness or the size of pair::second.
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From: "tydeman at tybor dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82909] Scope of type defined by offsetof() macro
Date: Thu, 09 Nov 2017 00:30:00 -0000
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--- Comment #2 from Fred J. Tydeman <tydeman at tybor dot com> ---
I agree with your analysis. The behavior is C standard version dependent with
respect to the 'if' statement. There is no bug in gcc.
>From gcc-bugs-return-581303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 00:42:00 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82911] New: missing strlen optimization for strncpy with constant strings and constant bound
Date: Thu, 09 Nov 2017 00:42:00 -0000
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Bug ID: 82911
Summary: missing strlen optimization for strncpy with constant
strings and constant bound
Product: gcc
Version: 8.0
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GCC can figure out the length of the string created by the first two statements
in f0() but it doesn't do the same in f1(). The optimization in f1() is
possible regardless of which of the constant strings is selected by the
conditional expression because they are both longer than the constant bound
specified by the third argument to strncpy. By making use of the
get_range_strln() function defined in gimple-fold.c the tree-ssa-strlen.c pass
could determine the length of the shortest source string and use it to gate the
same optimization as in the first case.
$ cat c.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c
void f0 (char *d)
{
__builtin_strncpy (d, "123", 2);
d[2] = 0;
if (__builtin_strlen (d) != 2) // eliminated, good
__builtin_abort ();
}
void f1 (char *d, _Bool b)
{
__builtin_strncpy (d, b ? "123" : "1234", 2);
d[2] = 0;
if (__builtin_strlen (d) != 2) // not eliminated but could be
__builtin_abort ();
}
;; Function f0 (f0, funcdef_no=0, decl_uid=1887, cgraph_uid=0, symbol_order=0)
f0 (char * d)
{
<bb 2> [local count: 10000]:
__builtin_memcpy (d_3(D), "123", 2);
MEM[(char *)d_3(D) + 2B] = 0;
return;
}
;; Function f1 (f1, funcdef_no=1, decl_uid=1891, cgraph_uid=1, symbol_order=1)
f1 (char * d, _Bool b)
{
long unsigned int _1;
const char * iftmp.0_2;
<bb 2> [local count: 10000]:
if (b_3(D) != 0)
goto <bb 4>; [50.00%]
else
goto <bb 3>; [50.00%]
<bb 3> [local count: 5000]:
<bb 4> [local count: 10000]:
# iftmp.0_2 = PHI <"123"(2), "1234"(3)>
__builtin_strncpy (d_5(D), iftmp.0_2, 2);
MEM[(char *)d_5(D) + 2B] = 0;
_1 = __builtin_strlen (d_5(D));
if (_1 != 2)
goto <bb 5>; [0.04%]
else
goto <bb 6>; [99.96%]
<bb 5> [count: 0]:
__builtin_abort ();
<bb 6> [local count: 9996]:
return;
}
>From gcc-bugs-return-581304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 00:47:39 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82912] New: missing strlen optimization for stpncpy with constant string and bound
Date: Thu, 09 Nov 2017 00:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82912
Bug ID: 82912
Summary: missing strlen optimization for stpncpy with constant
string and bound
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
GCC can figure out the length of the string created by the call to strncpy() in
f0() but it doesn't do the same for stpncpy() in f2() or f3().
Using stpncpy() the way f2() and f3() do is idiomatic and often preferred
because it is assumed to be more efficient than the equivalent sequence
involving strncpy().
See also pr82911 for a similar missed optimization opportunity involving
strncpy().
$ cat c.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c
void f0 (char *d)
{
__builtin_strncpy (d, "123", 2);
d[2] = 0;
if (__builtin_strlen (d) != 2) // eliminated, good
__builtin_abort ();
}
void f2 (char *d)
{
*__builtin_stpncpy (d, "123", 2) = 0;
if (__builtin_strlen (d) != 2) // not eliminated but should be
__builtin_abort ();
}
void f3 (char *d, _Bool b)
{
*__builtin_stpncpy (d, b ? "123" : "1234", 2) = 0;
if (__builtin_strlen (d) != 2) // not eliminated but could be
__builtin_abort ();
}
;; Function f0 (f0, funcdef_no=0, decl_uid=1887, cgraph_uid=0, symbol_order=0)
f0 (char * d)
{
<bb 2> [local count: 10000]:
__builtin_memcpy (d_3(D), "123", 2);
MEM[(char *)d_3(D) + 2B] = 0;
return;
}
;; Function f2 (f2, funcdef_no=1, decl_uid=1890, cgraph_uid=1, symbol_order=1)
f2 (char * d)
{
char * _1;
long unsigned int _2;
<bb 2> [local count: 10000]:
_1 = __builtin_stpncpy (d_4(D), "123", 2);
*_1 = 0;
_2 = __builtin_strlen (d_4(D));
if (_2 != 2)
goto <bb 3>; [0.04%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 9996]:
return;
}
;; Function f3 (f3, funcdef_no=2, decl_uid=1894, cgraph_uid=2, symbol_order=2)
f3 (char * d, _Bool b)
{
char * _1;
long unsigned int _2;
const char * iftmp.0_3;
<bb 2> [local count: 10000]:
if (b_4(D) != 0)
goto <bb 4>; [50.00%]
else
goto <bb 3>; [50.00%]
<bb 3> [local count: 5000]:
<bb 4> [local count: 10000]:
# iftmp.0_3 = PHI <"123"(2), "1234"(3)>
_1 = __builtin_stpncpy (d_6(D), iftmp.0_3, 2);
*_1 = 0;
_2 = __builtin_strlen (d_6(D));
if (_2 != 2)
goto <bb 5>; [0.04%]
else
goto <bb 6>; [99.96%]
<bb 5> [count: 0]:
__builtin_abort ();
<bb 6> [local count: 9996]:
return;
}
>From gcc-bugs-return-581305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 00:48:19 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70472] is_copy_constructible<vector<unique_ptr<int>>>::value is true
Date: Thu, 09 Nov 2017 00:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70472
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-09
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I have a fix for this now.
>From gcc-bugs-return-581306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 00:49:32 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82905] vector shift forced to 32 bits
Date: Thu, 09 Nov 2017 00:49:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
_1 = p[i_7];
_2 = (short unsigned int) _1;
_3 = m_11(D) * _2;
_4 = (int) _3;
_5 = _4 >> 8;
_6 = (unsigned char) _5;
p[i_7] = _6;
i_13 = i_7 + 1;
The problem is:
_4 = (int) _3;
_5 = _4 >> 8;
_6 = (unsigned char) _5;
Should have been optimized to:
(unsigned char) (_3 >> 8) (without the cast which is required by the C
promotion rules).
>From gcc-bugs-return-581307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 02:28:35 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82913] New: [8 Regression] ICE: Segmentation fault in try_merge_compare
Date: Thu, 09 Nov 2017 02:28:00 -0000
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Bug ID: 82913
Summary: [8 Regression] ICE: Segmentation fault in
try_merge_compare
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-8.0.0-alpha20171105 snapshot (r254432) ICEs when compiling the following
snippet w/ -O2, -O3, or -Ofast:
unsigned int iy;
unsigned long int pp;
int
vr (void)
{
++iy;
pp = 0;
}
unsigned long int
pu (int cq)
{
if (!vr () || !iy)
{
int wd = iy != pp;
if (wd != cq)
return iy;
}
return 0;
}
% x86_64-pc-linux-gnu-gcc-8.0.0-alpha20171105 -O2 -c tcj0zno5.c
during RTL pass: cmpelim
tcj0zno5.c: In function 'pu':
tcj0zno5.c:23:1: internal compiler error: Segmentation fault
}
^
0xc697ef crash_signal
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/toplev.c:324
0x132e310 try_merge_compare
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:690
0x132e310 try_eliminate_compare
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:730
0x132e310 execute_compare_elim_after_reload
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:873
0x132e310 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:916
>From gcc-bugs-return-581308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 03:21:16 2017
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Subject: [Bug fortran/78746] charlen_03, charlen_10 ICE
Date: Thu, 09 Nov 2017 03:21:00 -0000
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--- Comment #9 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #8)
> I have removed the two failing testcase and attached them to this PR.
>
> It is likely the dg-error will need to be updated when the bug is
> fixed.
Both of the remaining testcases now compile for me.
Probably can close this PR.
>From gcc-bugs-return-581309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 04:48:58 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82914] New: 'struct __attribute__ ((aligned (N))) s' ignores 'aligned' attribute
Date: Thu, 09 Nov 2017 04:48:00 -0000
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Bug ID: 82914
Summary: 'struct __attribute__ ((aligned (N))) s' ignores
'aligned' attribute
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I'm reporting a GCC problem that caused Emacs to SIGSEGV as described here:
https://bugs.gnu.org/29183
I tracked the problem down to an '__attribute__ ((aligned (8)))' that GCC
silently ignored. To reproduce the problem, consider the following program:
struct s { char mem; };
__attribute__ ((aligned (8))) struct s a;
struct __attribute__ ((aligned (8))) s b;
struct s __attribute__ ((aligned (8))) c;
struct s d __attribute__ ((aligned (8)));
Compile this with 'gcc -S' on x86-64, and you get:
.comm a,1,8
.comm b,1,1
.comm c,1,8
.comm d,1,8
Although the variables a, c, and d are properly aligned, the variable b is not:
the 'aligned' attribute is silently ignored for b.
I reproduced this problem with GCC 7.2.1 20170915 (Red Hat 7.2.1-2), running on
Fedora 26 x86-64.
>From gcc-bugs-return-581310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 04:52:03 2017
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Subject: [Bug libstdc++/82891] stable_sort() won't compile with function object that takes parameters by non-const reference
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--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Daniel Krügler from comment #2)
> (In reply to Tony E Lewis from comment #1)
> > I should say that I've also raised the same issue against libc++ :
> >
> > https://bugs.llvm.org/show_bug.cgi?id=35235
>
> There is now an LWG issue submission request waiting to become published for
> this. I'll return when it has been added.
There exists now an official LWG issue for this:
http://cplusplus.github.io/LWG/lwg-active.html#3031
>From gcc-bugs-return-581311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 05:09:18 2017
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Subject: [Bug c/82914] 'struct __attribute__ ((aligned (N))) s' ignores 'aligned' attribute
Date: Thu, 09 Nov 2017 05:09:00 -0000
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--- Comment #1 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Paul Eggert from comment #0)
Sorry, but my example in comment #0 (although it illustrates a bug) doesn't
illustrate the bug that crashed GCC. Here's a better example:
struct t { long mem; };
__attribute__ ((aligned (2))) struct t a;
struct __attribute__ ((aligned (2))) t b;
struct t __attribute__ ((aligned (2))) c;
struct t d __attribute__ ((aligned (2)));
This compiles into:
.comm a,8,2
.comm b,8,8
.comm c,8,2
.comm d,8,2
Here, only 'b' is aligned correctly. The variables a, c, and d have an
alignment of only 2, but they should have an alignment of 8 because
__attribute__ ((aligned (8))) is documented to never decrease the alignment of
a structure, only to increase it. The GCC 7.2 documentation
<https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Common-Variable-Attributes.html>
says, "When used on a struct, or struct member, the 'aligned' attribute can
only increase the alignment; in order to decrease it, the 'packed' attribute
must be specified as well."
>From gcc-bugs-return-581312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 07:28:16 2017
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Subject: [Bug c++/82915] New: Please mark intrinsics as constexpr
Date: Thu, 09 Nov 2017 07:28:00 -0000
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Bug ID: 82915
Summary: Please mark intrinsics as constexpr
Product: gcc
Version: 7.2.0
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Intrinsics are marked as inline now. However gcc knows what they do, and is
able to optimize out some code code which uses them - e.g. in example below
both count1a() and count2a() are optimized to "mov eax, 5; ret". Because of
this intrinsics could be marked as constexpr. This would allow gcc to better
optimize code. It also would allow to perform quick code validation in tools
like Compiler Explorer, by using code like below.
#include "immintrin.h"
constexpr int data[8] = {0, 1, 0, 2, 0, 3};
constexpr int count1(const int* d)
{
int cnt = 0;
for (int n = 0; n < 8; ++n)
if (0 == d[n])
++cnt;
return cnt;
}
int count1a()
{
return count1(data);
}
inline int count2(const int* d)
{
__m256i v = _mm256_loadu_si256((const __m256i*)d);
v = _mm256_cmpeq_epi32(v, _mm256_setzero_si256());
return _mm256_movemask_epi8(v) >> 2;
}
int count2a()
{
return count1(data);
}
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Subject: [Bug target/82915] Please mark intrinsics as constexpr
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-581314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:01:53 2017
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Subject: [Bug fortran/82895] An internal routine used in a parallel section (OpenMP) does not get the values of thread-private variables
Date: Thu, 09 Nov 2017 08:01:00 -0000
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--- Comment #4 from Arjen Markus <arjen.markus at deltares dot nl> ---
It was precisely this sort of issues that led me to write this small sample
program. And I realised this morning, that indeed the host variables need to be
avoided.
But does:
- loop_body accesses the host-associated, non-threadprivate variables q,
x, and id, and you get data races
mean that it is utterly unsafe to access even the shared variables (x and id in
this case)? That would defy the intentions of using a(n internal) routine
altogether. I need to have access to the entire array and the pattern of
iterations avoids data collisions.
(The I/O was an attempt to understand what was going on, as well as getting
slightly more work done per iteration)
>From gcc-bugs-return-581315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:07:12 2017
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Subject: [Bug fortran/82904] [7/8 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:261
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another missing DECL_EXPR in the FE emitted IL:
p ()
{
static integer(kind=4) _F.x;
static character(kind=1)[1:_F.x] * x = 0B;
^^^^
this one misses a DECL_EXPR
static integer(kind=4) _F.y;
static struct array1_unknown y = {.data=0B};
bitsizetype D.3620;
sizetype D.3621;
D.3620 = (bitsizetype) (sizetype) NON_LVALUE_EXPR <_F.y> * 8;
D.3621 = (sizetype) NON_LVALUE_EXPR <_F.y>;
{
>From gcc-bugs-return-581316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:08:51 2017
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Subject: [Bug c/82909] Scope of type defined by offsetof() macro
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Andreas Schwab <schwab@linux-m68k.org> changed:
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--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
Not a bug.
>From gcc-bugs-return-581318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:11:28 2017
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Subject: [Bug ipa/82903] [8 regression] gcc.dg/tree-prof/20050826-2.c fail
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/82902] [8 Regression] ICE verify_ssa failed during GIMPLE pass: phiprop
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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
Target Milestone|--- |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-581319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:13:43 2017
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Subject: [Bug middle-end/82905] vector shift forced to 32 bits
Date: Thu, 09 Nov 2017 08:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |middle-end
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We lack the narrowing pattern, only some FEs do that themselves. There's a dup
for avr somewhere.
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Subject: [Bug ipa/82908] [8 regression] gcc.dg/tree-prof/cmpsf-1.c and gcc.dg/tree-prof/20050826-2.c fail starting with r254452
Date: Thu, 09 Nov 2017 08:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/82907] [8 regression] gcc.target/powerpc/p9-xxbr-1.c fails after r254464
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-581322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:24:15 2017
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Subject: [Bug c++/82910] marking data members private affects code generation of copying
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With public members the C++ FE emits
;; Function pair my::get(const other&) (null)
;; enabled by -tree-original
<<cleanup_point <<< Unknown tree: expr_stmt
(void) (*NON_LVALUE_EXPR <((struct my *) this)->target> = *(struct pair &)
&TARGET_EXPR <D.2297, other::get ((const struct other *) other)>) >>>>>;
<<cleanup_point return <retval> = TARGET_EXPR <D.2337, ((struct my *)
this)->current>>>;
while with private members we end up with
<<cleanup_point <<< Unknown tree: expr_stmt
MEM[(struct pair *)NON_LVALUE_EXPR <((struct my *) this)->target>] =
MEM[(struct pair *)(struct pair &) &TARGET_EXPR <D.2301, other::get ((const
struct other *) other)>];, <<< Unknown tree: void_cst >>> >>>>>;
<<cleanup_point return <retval> = TARGET_EXPR <D.2341, ((struct my *)
this)->current>>>;
that is, the only difference is we use a different type. That's enough to
trigger
gimplification differences - with private members we emit
pair my::get(const other&) (struct my * const this, const struct other & other)
{
struct pair D.2301;
struct pair D.2343;
D.2301 = other::get (other);
try
{
_1 = this->target;
MEM[(struct pair *)_1] = MEM[(struct pair *)&D.2301];
}
finally
{
D.2301 = {CLOBBER};
}
D.2343 = this->current;
return D.2343;
}
while with public:
pair my::get(const other&) (struct my * const this, const struct other & other)
{
struct pair D.2339;
_1 = this->target;
*_1 = other::get (other);
D.2339 = this->current;
return D.2339;
}
so we have an extra temporary forced upon us. Not sure if middle-end
gimplification is confused by the different GENERIC or FE gimplification.
>From gcc-bugs-return-581323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:25:02 2017
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Subject: [Bug rtl-optimization/82913] [8 Regression] ICE: Segmentation fault in try_merge_compare
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-581324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:26:56 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82915] Please mark intrinsics as constexpr
Date: Thu, 09 Nov 2017 08:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Note this trivially applies to all open-coded intrinsics not using
__builtin_ia32_* calls, marking those constexpr would require significant work
(work that might be useful anyways for optimization, of course).
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Subject: [Bug c/82914] 'struct __attribute__ ((aligned (N))) s' ignores 'aligned' attribute
Date: Thu, 09 Nov 2017 08:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #1)
> (In reply to Paul Eggert from comment #0)
>
> Sorry, but my example in comment #0 (although it illustrates a bug) doesn't
> illustrate the bug that crashed GCC. Here's a better example:
>
> struct t { long mem; };
> __attribute__ ((aligned (2))) struct t a;
> struct __attribute__ ((aligned (2))) t b;
> struct t __attribute__ ((aligned (2))) c;
> struct t d __attribute__ ((aligned (2)));
>
> This compiles into:
>
> .comm a,8,2
> .comm b,8,8
> .comm c,8,2
> .comm d,8,2
>
> Here, only 'b' is aligned correctly. The variables a, c, and d have an
> alignment of only 2, but they should have an alignment of 8 because
> __attribute__ ((aligned (8))) is documented to never decrease the alignment
> of a structure, only to increase it. The GCC 7.2 documentation
> <https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Common-Variable-Attributes.
> html> says, "When used on a struct, or struct member, the 'aligned'
> attribute can only increase the alignment; in order to decrease it, the
> 'packed' attribute must be specified as well."
I think this applies to types but not to variables. IIRC there's no packed
attribute for variables:
int a __attribute__((aligned(2),packed));
> gcc-7 -S t.c
t.c:1:1: warning: ‘packed’ attribute ignored [-Wattributes]
int a __attribute__((aligned(2),packed));
^~~
so yes, for type definitions you should need packed to decrease alignment
but for variable declarations aligned is taken literally.
You are not using aligned on a 'struct or struct member' but on the variable
in all but (b).
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Subject: [Bug rtl-optimization/82913] [8 Regression] ICE: Segmentation fault in try_merge_compare
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
CC| |jakub at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r254328.
>From gcc-bugs-return-581328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 08:54:56 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/82837] [8 Regression] ICE in output_operand: invalid expression as operand
Date: Thu, 09 Nov 2017 08:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82837
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 9 08:54:19 2017
New Revision: 254561
URL: https://gcc.gnu.org/viewcvs?rev=254561&root=gcc&view=rev
Log:
PR debug/82837
* dwarf2out.c (const_ok_for_output_1): Reject NEG in addition to NOT.
(mem_loc_descriptor): Handle (const (neg (...))) as (neg (const (...)))
and similarly for not instead of neg.
* gcc.dg/debug/dwarf2/pr82837.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/debug/dwarf2/pr82837.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 08:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
The cc1 gem from comment #2 actually comes from libz's deflate.c, function
deflate_stores:
/* Replace the lengths in the dummy stored block with len. */
s->pending_buf[s->pending - 4] = len;
s->pending_buf[s->pending - 3] = len >> 8;
s->pending_buf[s->pending - 2] = ~len;
s->pending_buf[s->pending - 1] = ~len >> 8;
The compiler, patched with both patches, does not merge stores there.
Please consider following testcase:
--cut here--
typedef __SIZE_TYPE__ size_t;
struct s
{
char *buf;
size_t cnt;
};
void foo (struct s *state, unsigned int data)
{
state->buf[state->cnt - 4] = data;
state->buf[state->cnt - 3] = data >> 8;
state->buf[state->cnt - 2] = ~data;
state->buf[state->cnt - 1] = ~data >> 8;
}
void bar (char *buf, size_t *cnt, unsigned int data)
{
buf[*cnt - 4] = data;
buf[*cnt - 3] = data >> 8;
buf[*cnt - 2] = ~data;
buf[*cnt - 1] = ~data >> 8;
}
void baz (char *buf, size_t cnt, unsigned int data)
{
buf[cnt - 4] = data;
buf[cnt - 3] = data >> 8;
buf[cnt - 2] = ~data;
buf[cnt - 1] = ~data >> 8;
}
--cut here--
None of the stores in the above functions are merged.
The simplest function (baz) results in:
[*] movl %edx, %eax
movb %dl, -4(%rdi,%rsi)
movb %dh, -3(%rdi,%rsi)
notl %eax
[**] notl %edx
movb %al, -2(%rdi,%rsi)
movb %dh, -1(%rdi,%rsi)
In addition to a merge opportunity, there is a redundant move [*], that results
in redundant operation [**]. The whole function could be just:
movw %dx, -4(%rdi,%rsi)
notl %edx
movw %dx, -2(%rdi,%rsi)
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 09:01:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 9 Nov 2017, ubizjak at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
>
> --- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
> The cc1 gem from comment #2 actually comes from libz's deflate.c, function
> deflate_stores:
>
> /* Replace the lengths in the dummy stored block with len. */
> s->pending_buf[s->pending - 4] = len;
> s->pending_buf[s->pending - 3] = len >> 8;
> s->pending_buf[s->pending - 2] = ~len;
> s->pending_buf[s->pending - 1] = ~len >> 8;
>
> The compiler, patched with both patches, does not merge stores there.
>
> Please consider following testcase:
>
> --cut here--
> typedef __SIZE_TYPE__ size_t;
>
> struct s
> {
> char *buf;
> size_t cnt;
> };
>
> void foo (struct s *state, unsigned int data)
> {
> state->buf[state->cnt - 4] = data;
> state->buf[state->cnt - 3] = data >> 8;
> state->buf[state->cnt - 2] = ~data;
> state->buf[state->cnt - 1] = ~data >> 8;
> }
>
> void bar (char *buf, size_t *cnt, unsigned int data)
> {
> buf[*cnt - 4] = data;
> buf[*cnt - 3] = data >> 8;
> buf[*cnt - 2] = ~data;
> buf[*cnt - 1] = ~data >> 8;
> }
>
> void baz (char *buf, size_t cnt, unsigned int data)
> {
> buf[cnt - 4] = data;
> buf[cnt - 3] = data >> 8;
> buf[cnt - 2] = ~data;
> buf[cnt - 1] = ~data >> 8;
> }
> --cut here--
>
> None of the stores in the above functions are merged.
>
> The simplest function (baz) results in:
>
> [*] movl %edx, %eax
> movb %dl, -4(%rdi,%rsi)
> movb %dh, -3(%rdi,%rsi)
> notl %eax
> [**] notl %edx
> movb %al, -2(%rdi,%rsi)
> movb %dh, -1(%rdi,%rsi)
>
> In addition to a merge opportunity, there is a redundant move [*], that results
> in redundant operation [**]. The whole function could be just:
>
> movw %dx, -4(%rdi,%rsi)
> notl %edx
> movw %dx, -2(%rdi,%rsi)
or
xorl $0xffff0000, %edx
movl %edx, -4(%rdi,%rsi)
?
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/82837] [8 Regression] ICE in output_operand: invalid expression as operand
Date: Thu, 09 Nov 2017 09:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug gcov-profile/48463] gcov does not handle C++ clones (deleting ctors, template instantiations)
Date: Thu, 09 Nov 2017 09:11:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov 9 09:11:17 2017
New Revision: 254562
URL: https://gcc.gnu.org/viewcvs?rev=254562&root=gcc&view=rev
Log:
GCOV: support multiple functions per a line (PR gcov-profile/48463)
2017-11-09 Martin Liska <mliska@suse.cz>
PR gcov-profile/48463
* coverage.c (coverage_begin_function): Output also end locus
of a function and information whether the function is
artificial.
* gcov-dump.c (tag_function): Parse and print the information.
* gcov.c (INCLUDE_MAP): Add include.
(INCLUDE_SET): Likewise.
(struct line_info): Move earlier in the source file because
of vector<line_info> in function_info structure.
(line_info::line_info): Likewise.
(line_info::has_block): Likewise.
(struct source_info): Add new member index.
(source_info::get_functions_at_location): New function.
(function_info::group_line_p): New function.
(output_intermediate_line): New function.
(output_intermediate_file): Use the mentioned function.
(struct function_start): New.
(struct function_start_pair_hash): Likewise.
(process_file): Add code that identifies group functions.
Assign lines either to global or function scope.
(generate_results): Skip artificial functions.
(find_source): Assign index for each source file.
(read_graph_file): Read new flag artificial and end_line.
(add_line_counts): Assign it either to global of function scope.
(accumulate_line_counts): Isolate core of the function to
accumulate_line_info and call it for both function and global
scope lines.
(accumulate_line_info): New function.
(output_line_beginning): Fix GNU coding style.
(print_source_line): New function.
(output_line_details): Likewise.
(output_function_details): Likewise.
(output_lines): Iterate both source (global) scope and function
scope.
(struct function_line_start_cmp): New class.
* doc/gcov.texi: Reflect changes in documentation.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/coverage.c
trunk/gcc/doc/gcov.texi
trunk/gcc/gcov-dump.c
trunk/gcc/gcov.c
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 09:12:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
On a related note, following testcase:
--cut here--
typedef __SIZE_TYPE__ size_t;
void baz (char *buf, unsigned int data)
{
buf[0] = data;
buf[1] = data >> 8;
buf[2] = ~data >> 8;
buf[3] = ~data;
}
--cut here--
could be optimized with -march=haswell to:
movw %si, (%rdi)
notl %eax
movbew %si, 2(%rdi)
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to rguenther@suse.de from comment #6)
> > In addition to a merge opportunity, there is a redundant move [*], that results
> > in redundant operation [**]. The whole function could be just:
> >
> > movw %dx, -4(%rdi,%rsi)
> > notl %edx
> > movw %dx, -2(%rdi,%rsi)
>
> or
>
> xorl $0xffff0000, %edx
> movl %edx, -4(%rdi,%rsi)
>
> ?
Yes, even this. It looks that store merging opens many optimization
opportunities.
>From gcc-bugs-return-581334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:19:18 2017
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Subject: [Bug gcov-profile/48463] gcov does not handle C++ clones (deleting ctors, template instantiations)
Date: Thu, 09 Nov 2017 09:19:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:20:08 2017
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Subject: [Bug gcov-profile/47618] Collecting multiple profiles and using all for PGO
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
I see any feedback, leaving the PR then ...
>From gcc-bugs-return-581336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:21:55 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 09:21:00 -0000
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 9 Nov 2017, ubizjak at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
>
> --- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
> (In reply to rguenther@suse.de from comment #6)
>
> > > In addition to a merge opportunity, there is a redundant move [*], that results
> > > in redundant operation [**]. The whole function could be just:
> > >
> > > movw %dx, -4(%rdi,%rsi)
> > > notl %edx
> > > movw %dx, -2(%rdi,%rsi)
> >
> > or
> >
> > xorl $0xffff0000, %edx
> > movl %edx, -4(%rdi,%rsi)
> >
> > ?
>
> Yes, even this. It looks that store merging opens many optimization
> opportunities.
I believe we should aggressively merge stores as this helps STLF
(as opposed to merging loads which can introduce STLF issues)
>From gcc-bugs-return-581337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:33:30 2017
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Subject: [Bug bootstrap/82916] New: [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Thu, 09 Nov 2017 09:33:00 -0000
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Bug ID: 82916
Summary: [8 regression] gcc miscompiled during stagefeedback
(PGO bootstrap)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
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Target Milestone: ---
During stagefeedback (PGO bootstrap) gcc gets miscompiled.
It segfaults when building libgcc, e.g.:
trippels@gcc2-power8 libgcc % gdb --args
/home/trippels/gcc_build_dir_/./gcc/xgcc -B/home/trippels/gcc_build_dir_/./gcc/
-B/usr/local/powerpc64le-unknown-linux-gnu/bin/
-B/usr/local/powerpc64le-unknown-linux-gnu/lib/ -isystem
/usr/local/powerpc64le-unknown-linux-gnu/include -isystem
/usr/local/powerpc64le-unknown-linux-gnu/sys-include -mcpu=power8
-Wno-error=coverage-mismatch -O3 -pipe -O2 -mcpu=power8
-Wno-error=coverage-mismatch -O3 -pipe -DIN_GCC -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -isystem ./include -fPIC -mlong-double-128
-mno-minimal-toc -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fPIC
-mlong-double-128 -mno-minimal-toc -I. -I. -I../.././gcc -I../../../gcc/libgcc
-I../../../gcc/libgcc/. -I../../../gcc/libgcc/../gcc
-I../../../gcc/libgcc/../include -I../../../gcc/libgcc/../libdecnumber/dpd
-I../../../gcc/libgcc/../libdecnumber -DHAVE_CC_TLS -o _gcov_merge_add.o -MT
_gcov_merge_add.o -MD -MP -MF _gcov_merge_add.dep -DL_gcov_merge_add -c
../../../gcc/libgcc/libgcov-merge.c
Thread 2.1 "cc1" received signal SIGSEGV, Segmentation fault.
[Switching to process 9861]
0x0000000010317914 in nearest_common_dominator_for_set(cdi_direction,
bitmap_head*) ()
(gdb) bt
#0 0x0000000010317914 in nearest_common_dominator_for_set(cdi_direction,
bitmap_head*) ()
#1 0x0000000010610f70 in update_ssa(unsigned int) ()
#2 0x00000000107a36ac in (anonymous namespace)::pass_vrp::execute(function*)
()
#3 0x000000001051b39c in execute_one_pass(opt_pass*) ()
#4 0x000000001051ec40 in execute_pass_list(function*, opt_pass*) ()
#5 0x00000000102c1f84 in cgraph_node::expand() ()
#6 0x0000000010af4620 in symbol_table::compile() ()
#7 0x00000000102be550 in symbol_table::finalize_compilation_unit() ()
#8 0x0000000010d220dc in compile_file() ()
#9 0x00000000101b36ec in toplev::main(int, char**) ()
#10 0x00000000101b5928 in main ()
>From gcc-bugs-return-581338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:35:38 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le-*-*
Target Milestone|--- |8.0
>From gcc-bugs-return-581339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:37:19 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 09:37:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
All the store merging changes so far were for the same operations on all the
loads/constant values.
In order to handle something like this, we'd need to best hook in the bswap
machinery, probably start with moving over the bswap pass from
tree-ssa-math-opts.c to gimple-ssa-store-merging.c. Then for stores that are
8/16/32 bits wide, try/remember find_bswap_or_nop_1 (stmt as well as
symbolic_number).
Then, if the stores are really all adjacent and form a power of two bitsize and
their symbolic numbers combined are cmpnop or cmpxchg consider that as identity
or bswap operation and use bswap_replace to prepare the argument for the group
store.
Now, it would be somewhat different in the way it needs to be handled, the
alignment needs to be taken into account already at coalesce_immediate_stores
time and split_group would for such a group need to result in store of
everything together.
>From gcc-bugs-return-581340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:37:32 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64le-*-* |powerpc64le-*-*, x86_64-*-*
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens on X86_64, so I guess the issue is target independent.
>From gcc-bugs-return-581341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 09:55:17 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 9 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
>
> --- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> All the store merging changes so far were for the same operations on all the
> loads/constant values.
> In order to handle something like this, we'd need to best hook in the bswap
> machinery, probably start with moving over the bswap pass from
> tree-ssa-math-opts.c to gimple-ssa-store-merging.c.
Moving the pass was on my list of thoughts as well.
> Then for stores that are
> 8/16/32 bits wide, try/remember find_bswap_or_nop_1 (stmt as well as
> symbolic_number).
> Then, if the stores are really all adjacent and form a power of two bitsize and
> their symbolic numbers combined are cmpnop or cmpxchg consider that as identity
> or bswap operation and use bswap_replace to prepare the argument for the group
> store.
> Now, it would be somewhat different in the way it needs to be handled, the
> alignment needs to be taken into account already at coalesce_immediate_stores
> time and split_group would for such a group need to result in store of
> everything together.
I think bswap doesn't currently track operations like ~ ontop of the
individual bytes so that would need to be added as well. It would
become more and more a "mini vectorization" pass thus even operations
like + constant would be interesting (but more difficult if the
individual pieces are not bytes).
Note that to avoid exponential issues we should remember the
bswap state for each SSA def we ever processed (still starting only
from stores for the purpose of store merging). I think the current
bswap pass doesn't do that (but restricts itself to single-uses)
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Subject: [Bug rtl-optimization/69567] PowerPC64: cstore optimisation produces bad code
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--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:21:06 2017
New Revision: 254564
URL: https://gcc.gnu.org/viewcvs?rev=254564&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/82683] Combine: GCC generates bad code with -tune=thunderx2t99
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82683
--- Comment #19 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:21:06 2017
New Revision: 254564
URL: https://gcc.gnu.org/viewcvs?rev=254564&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/69737] [5 Regression] FAIL: gcc.c-torture/execute/pr64682.c -O2 execution test
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:21:06 2017
New Revision: 254564
URL: https://gcc.gnu.org/viewcvs?rev=254564&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/64682] [5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:21:06 2017
New Revision: 254564
URL: https://gcc.gnu.org/viewcvs?rev=254564&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/69567] PowerPC64: cstore optimisation produces bad code
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:23:30 2017
New Revision: 254565
URL: https://gcc.gnu.org/viewcvs?rev=254565&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/82683] Combine: GCC generates bad code with -tune=thunderx2t99
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--- Comment #20 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:23:30 2017
New Revision: 254565
URL: https://gcc.gnu.org/viewcvs?rev=254565&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/69737] [5 Regression] FAIL: gcc.c-torture/execute/pr64682.c -O2 execution test
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:23:30 2017
New Revision: 254565
URL: https://gcc.gnu.org/viewcvs?rev=254565&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/64682] [5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Thu, 09 Nov 2017 10:24:00 -0000
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Nov 9 10:23:30 2017
New Revision: 254565
URL: https://gcc.gnu.org/viewcvs?rev=254565&root=gcc&view=rev
Log:
Backport from mainline
2017-11-01 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/64682
PR rtl-optimization/69567
PR rtl-optimization/69737
PR rtl-optimization/82683
* combine.c (distribute_notes) <REG_DEAD>: If the new I2 sets the same
register mentioned in the note, drop the note, unless it came from I3,
in which case it should go to I3 again.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
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Subject: [Bug rtl-optimization/82683] Combine: GCC generates bad code with -tune=thunderx2t99
Date: Thu, 09 Nov 2017 10:27:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #21 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on all open branches.
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Subject: [Bug tree-optimization/82669] ICE at -Os on valid code on x86_64-linux-gnu: in bitmap_check_index, at sbitmap.h:105
Date: Thu, 09 Nov 2017 10:27:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov 9 10:27:21 2017
New Revision: 254567
URL: https://gcc.gnu.org/viewcvs?rev=254567&root=gcc&view=rev
Log:
Remove non needed check in bmp_iter_set_init (PR tree-optimization/82669).
2017-11-09 Martin Liska <mliska@suse.cz>
PR tree-optimization/82669
* sbitmap.h (bmp_iter_set_init): Remove non needed check.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/sbitmap.h
>From gcc-bugs-return-581352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 10:32:14 2017
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Subject: [Bug tree-optimization/82669] ICE at -Os on valid code on x86_64-linux-gnu: in bitmap_check_index, at sbitmap.h:105
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
Ever confirmed|0 |1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r254536.
>From gcc-bugs-return-581354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 10:42:06 2017
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Subject: [Bug c++/82737] [ICE] Compiler segfault on compilation of a certain file (full cause unknown) (file too large for upload, link provided)
Date: Thu, 09 Nov 2017 10:42:00 -0000
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--- Comment #20 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #19)
> I can take a look at the trunk crash, but not till next week. You could try
> https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00384.html, which I've yet to
> commit.
Don't hurry. However the mentioned patch does not help with this ICE.
>From gcc-bugs-return-581355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 10:51:54 2017
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From: "derodat at adacore dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/82844] [8 Regression] Many ada tests time out on x32
Date: Thu, 09 Nov 2017 10:51:00 -0000
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--- Comment #9 from Pierre-Marie de Rodat <derodat at adacore dot com> ---
I’ve setup an Ubuntu VM, installed libx32 runtime libraries and built with
“--with-multilib-list=m32,m64,mx32†+ ran the testsuite (“make -C gcc -j8 -k
check-adaâ€), without reproducing the issues you describe. Is there something
obvious missing?
[I’ve since resumed porting GNAT patches, so hopefully the issue will disappear
on your side]
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Subject: [Bug rtl-optimization/82913] [8 Regression] ICE: Segmentation fault in try_merge_compare
Date: Thu, 09 Nov 2017 11:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42566
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42566&action=edit
gcc8-pr82913.patch
Untested fix.
The problem is that we have:
(insn 9 59 10 2 (parallel [
(set (reg:DI 0 ax)
(zero_extend:DI (plus:SI (reg:SI 0 ax [107])
(const_int 1 [0x1]))))
(clobber (reg:CC 17 flags))
]) "pr82913.c":7 219 {addsi_1_zext}
(nil))
...
(insn 14 13 23 2 (set (reg:CCZ 17 flags)
(compare:CCZ (reg:SI 0 ax [orig:90 _8 ] [90])
(const_int 0 [0]))) "pr82913.c":14 3 {*cmpsi_ccno_1}
(nil))
(insn 23 14 24 2 (set (reg:CCZ 17 flags)
(compare:CCZ (reg:DI 0 ax [orig:95 <retval> ] [95])
(const_int 0 [0]))) "pr82913.c":16 4 {*cmpdi_ccno_1}
(nil))
and we record insn 9 as cmp 23's in_a_setter when it is single_set. But then
try_eliminate_compare on the cmp 14 turns it into a cmp+zext plus and suddenly
when processing cmp 23 it is no longer a single_set. By readding this guard we
end up with what we used to do, in this particular case it would need further
analysis to do something better (find out that because the comparison consumer
is a NZ test that we could just reuse the SImode comparison, as the zero
extension doesn't affect it; if the comparison was e.g. DImode and we'd test
the sign bit, that wouldn't be true).
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Subject: [Bug libstdc++/82891] stable_sort() won't compile with function object that takes parameters by non-const reference
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--- Comment #4 from Tony E Lewis <TonyELewis at hotmail dot com> ---
Thanks very much for your quick work on this.
I agree that changing the standard is a reasonable approach but I also think
that changing the library implementations is a reasonable approach too. Please
may I ask what reasons make you go straight down the spec-changing route rather
than making the libraries comply?
I tried putting the argument on the libc++ issue (here:
https://bugs.llvm.org/show_bug.cgi?id=35235 ) that changing the libraries is
do-able and helps make more reasonable code "just work". It also removes one
more corner case from generic-programming. This seems to all work in the right
direction of making C++ simpler. Are these arguments unpersuasive?
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Subject: [Bug fortran/78746] charlen_03, charlen_10 ICE
Date: Thu, 09 Nov 2017 11:17:00 -0000
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Both of the remaining testcases now compile for me.
> Probably can close this PR.
With my instrumented gfortran compiler I still see failures similar to the one
reported in comment 2:
pr78746.f90:5:39:
character(:), allocatable :: x(n) ! { dg-error "must have a deferred
shape" }
1
Error: Allocatable component of structure at (1) must have a deferred shape
=================================================================
==80385==ERROR: AddressSanitizer: heap-use-after-free on address 0x6040000010e8
at pc 0x0001003b3627 bp 0x7fff5fbfe530 sp 0x7fff5fbfe528
READ of size 8 at 0x6040000010e8 thread T0
#0 0x1003b3626 in gfc_resolve_expr(gfc_expr*) resolve.c:6736
#1 0x100015279 in resolve_array_bound(gfc_expr*, int) array.c:327
#2 0x10001bd19 in gfc_resolve_array_spec(gfc_array_spec*, int) array.c:368
#3 0x1003a7bdd in resolve_component(gfc_component*, gfc_symbol*)
resolve.c:13920
#4 0x1003abfa1 in resolve_fl_derived0(gfc_symbol*) resolve.c:14039
#5 0x1003acbdb in resolve_fl_derived(gfc_symbol*) resolve.c:14134
#6 0x10039a977 in resolve_symbol(gfc_symbol*) resolve.c:14479
#7 0x10046c576 in do_traverse_symtree(gfc_symtree*, void (*)(gfc_symtree*),
void (*)(gfc_symbol*)) symbol.c:4157
#8 0x10048a3a5 in gfc_traverse_ns(gfc_namespace*, void (*)(gfc_symbol*))
symbol.c:4182
#9 0x1004002ed in resolve_types(gfc_namespace*) resolve.c:16358
#10 0x100395fc9 in gfc_resolve(gfc_namespace*) resolve.c:16472
#11 0x1002feb25 in resolve_all_program_units(gfc_namespace*) parse.c:6030
#12 0x10031dc5f in gfc_parse_file() parse.c:6280
#13 0x1004d36b3 in gfc_be_parse_file() f95-lang.c:204
#14 0x1052de1b0 in compile_file() toplev.c:454
#15 0x1052e857d in do_compile() toplev.c:2059
#16 0x1075dd23b in toplev::main(int, char**) toplev.c:2194
#17 0x1075e2a87 in main main.c:39
#18 0x7fffcb057234 in start (libdyld.dylib:x86_64+0x5234)
0x6040000010e8 is located 24 bytes inside of 48-byte region
[0x6040000010d0,0x604000001100)
freed by thread T0 here:
#0 0x1562efe10 in wrap_free.part.0 sanitizer_malloc_mac.inc:142
#1 0x100480732 in gfc_delete_symtree(gfc_symtree**, char const*)
symbol.c:2927
#2 0x10049a7d4 in gfc_restore_last_undo_checkpoint() symbol.c:3694
#3 0x10049aa2c in gfc_undo_symbols() symbol.c:3727
#4 0x1002fefd5 in reject_statement() parse.c:2546
#5 0x1002ff11d in match_word(char const*, match (*)(), locus*) parse.c:70
#6 0x10030ba38 in decode_statement() parse.c:376
#7 0x10030e091 in next_free() parse.c:1225
#8 0x10030ea5e in next_statement() parse.c:1457
#9 0x100313af2 in parse_derived() parse.c:3255
#10 0x1003154d7 in parse_spec(gfc_statement) parse.c:3795
#11 0x10031b954 in parse_progunit(gfc_statement) parse.c:5637
#12 0x10031dc21 in gfc_parse_file() parse.c:6177
#13 0x1004d36b3 in gfc_be_parse_file() f95-lang.c:204
#14 0x1052de1b0 in compile_file() toplev.c:454
#15 0x1052e857d in do_compile() toplev.c:2059
#16 0x1075dd23b in toplev::main(int, char**) toplev.c:2194
#17 0x1075e2a87 in main main.c:39
#18 0x7fffcb057234 in start (libdyld.dylib:x86_64+0x5234)
previously allocated by thread T0 here:
#0 0x1562ef46c in wrap_calloc sanitizer_malloc_mac.inc:153
#1 0x10746b354 in xcalloc xmalloc.c:162
#2 0x1004803dd in gfc_new_symtree(gfc_symtree**, char const*) symbol.c:2897
#3 0x1004843d2 in gfc_get_sym_tree(char const*, gfc_namespace*,
gfc_symtree**, bool) symbol.c:3356
#4 0x100490128 in gfc_get_ha_sym_tree(char const*, gfc_symtree**)
symbol.c:3441
#5 0x100341f22 in gfc_match_rvalue(gfc_expr**) primary.c:3141
#6 0x100226505 in match_primary(gfc_expr**) matchexp.c:157
#7 0x100226794 in match_level_1(gfc_expr**) matchexp.c:211
#8 0x100226b09 in match_mult_operand(gfc_expr**) matchexp.c:267
#9 0x100227313 in match_add_operand(gfc_expr**) matchexp.c:356
#10 0x100227d00 in match_level_2(gfc_expr**) matchexp.c:480
#11 0x100228210 in match_level_3(gfc_expr**) matchexp.c:551
#12 0x100228689 in match_level_4(gfc_expr**) matchexp.c:599
#13 0x1002294bd in match_and_operand(gfc_expr**) matchexp.c:693
#14 0x10022978c in match_or_operand(gfc_expr**) matchexp.c:722
#15 0x100229bf1 in match_equiv_operand(gfc_expr**) matchexp.c:765
#16 0x10022a060 in match_level_5(gfc_expr**) matchexp.c:811
#17 0x100226029 in gfc_match_expr(gfc_expr**) matchexp.c:870
#18 0x1000192cc in match_array_element_spec(gfc_array_spec*) array.c:433
#19 0x10001ca3d in gfc_match_array_spec(gfc_array_spec**, bool, bool)
array.c:528
#20 0x1000cf09c in variable_decl(int) decl.c:2256
#21 0x1000d2ab8 in gfc_match_data_decl() decl.c:5679
#22 0x1002ff09b in match_word(char const*, match (*)(), locus*) parse.c:65
#23 0x10030ba38 in decode_statement() parse.c:376
#24 0x10030e091 in next_free() parse.c:1225
#25 0x10030ea5e in next_statement() parse.c:1457
#26 0x100313af2 in parse_derived() parse.c:3255
#27 0x1003154d7 in parse_spec(gfc_statement) parse.c:3795
#28 0x10031b954 in parse_progunit(gfc_statement) parse.c:5637
#29 0x10031dc21 in gfc_parse_file() parse.c:6177
SUMMARY: AddressSanitizer: heap-use-after-free resolve.c:6736 in
gfc_resolve_expr(gfc_expr*)
Shadow bytes around the buggy address:
0x1c08000001c0: fa fa 00 00 00 00 00 00 fa fa 00 00 00 00 00 00
0x1c08000001d0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
0x1c08000001e0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
0x1c08000001f0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
0x1c0800000200: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fa
=>0x1c0800000210: fa fa 00 00 00 00 00 00 fa fa fd fd fd[fd]fd fd
0x1c0800000220: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
0x1c0800000230: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
0x1c0800000240: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
0x1c0800000250: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
0x1c0800000260: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==80385==ABORTING
f951: internal compiler error: Abort trap: 6
>From gcc-bugs-return-581359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 11:37:23 2017
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Subject: [Bug preprocessor/53404] warning column reported on comment in warning during bootstrap
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |build, diagnostic
Status|WAITING |NEW
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> (In reply to Eric Gallager from comment #3)
> > (In reply to Manuel López-Ibáñez from comment #2)
> > > I don't see this any longer.
> >
> > I think I might've seen this before, but I'll have to double-check the next
> > time I bootstrap to make sure
>
> The warnings I get from gengtype-lex.c when bootstrapping are now:
>
> ../../gcc/gengtype-lex.l: In function ‘int yylex(const char**)’:
> gengtype-lex.c:287:13: warning: this statement may fall through
> [-Wimplicit-fallthrough=]
> *yy_cp = '\0'; \
> ~~~~~~~~~~~^~~
> ../../gcc/gengtype-lex.l:116:1: note: in expansion of macro
> ‘YY_DO_BEFORE_ACTION’
> *yylval = XDUPVAR (const char, yytext, yyleng, yyleng + 1);
> ^ ~~~~~~~~~~~~~~~
> ../../gcc/gengtype-lex.l:113:1: note: here
> "~" |
> ^~~~
> gengtype-lex.c:287:13: warning: this statement may fall through
> [-Wimplicit-fallthrough=]
> *yy_cp = '\0'; \
> ~~~~~~~~~~~^~~
> ../../gcc/gengtype-lex.l:133:1: note: in expansion of macro
> ‘YY_DO_BEFORE_ACTION’
>
> ^
> ../../gcc/gengtype-lex.l:131:1: note: here
> "ENUM_BITFIELD"{WS}?"("{WS}?{ID}{WS}?")" {
> ^~~~
>
> ...which is no longer in a comment, but it still seems like there's some
> wrong location information involved. Separate issue or the same thing?
I'm gonna assume it's the same thing and confirm this.
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Subject: [Bug lto/81968] [8 regression] early lto debug objects make Solaris ld SEGV
Date: Thu, 09 Nov 2017 11:40:00 -0000
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--- Comment #29 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> It does by removing the SHT_NULL sections. The patch should work - you
> can double-check - it just doesn't handle the "corner case" of more
> than 32000 input sections correctly when rewriting the symbol table.
There is one nit with -g3 on x86-64/Linux:
FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 (test for excess errors)
FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 -O (test for excess errors)
FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 -O3 (test for excess errors)
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
group info for section .debug_macro
/tmp/ccyqoYHFdebugobjtem: file not recognized: Bad value
collect2: error: ld returned 1 exit status
lto-wrapper: fatal error: gcc/xgcc returned 1 exit status
compilation terminated.
/home/eric/install/gcc/x86_64-suse-linux/bin/ld: error: lto-wrapper failed
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Subject: [Bug c/82914] 'struct __attribute__ ((aligned (N))) s' ignores 'aligned' attribute
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> (In reply to Paul Eggert from comment #1)
> > (In reply to Paul Eggert from comment #0)
> >
> > Sorry, but my example in comment #0 (although it illustrates a bug) doesn't
> > illustrate the bug that crashed GCC. Here's a better example:
> >
> > struct t { long mem; };
> > __attribute__ ((aligned (2))) struct t a;
> > struct __attribute__ ((aligned (2))) t b;
> > struct t __attribute__ ((aligned (2))) c;
> > struct t d __attribute__ ((aligned (2)));
> >
> > This compiles into:
> >
> > .comm a,8,2
> > .comm b,8,8
> > .comm c,8,2
> > .comm d,8,2
> >
> > Here, only 'b' is aligned correctly. The variables a, c, and d have an
> > alignment of only 2, but they should have an alignment of 8 because
> > __attribute__ ((aligned (8))) is documented to never decrease the alignment
> > of a structure, only to increase it. The GCC 7.2 documentation
> > <https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Common-Variable-Attributes.
> > html> says, "When used on a struct, or struct member, the 'aligned'
> > attribute can only increase the alignment; in order to decrease it, the
> > 'packed' attribute must be specified as well."
>
> I think this applies to types but not to variables. IIRC there's no packed
> attribute for variables:
>
> int a __attribute__((aligned(2),packed));
> > gcc-7 -S t.c
> t.c:1:1: warning: ‘packed’ attribute ignored [-Wattributes]
> int a __attribute__((aligned(2),packed));
> ^~~
>
> so yes, for type definitions you should need packed to decrease alignment
> but for variable declarations aligned is taken literally.
>
> You are not using aligned on a 'struct or struct member' but on the variable
> in all but (b).
You'd still think there'd be a diagnostic from -Wattributes for the aligned
attribute, too, not just the packed one...
>From gcc-bugs-return-581362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 11:50:27 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/81968] [8 regression] early lto debug objects make Solaris ld SEGV
Date: Thu, 09 Nov 2017 11:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968
--- Comment #30 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 9 Nov 2017, ebotcazou at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968
>
> --- Comment #29 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> > It does by removing the SHT_NULL sections. The patch should work - you
> > can double-check - it just doesn't handle the "corner case" of more
> > than 32000 input sections correctly when rewriting the symbol table.
>
> There is one nit with -g3 on x86-64/Linux:
>
> FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 (test for excess errors)
> FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 -O (test for excess errors)
> FAIL: gcc.dg/debug/pr41893-1.c -gdwarf-2 -g3 -O3 (test for excess errors)
>
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: /tmp/ccyqoYHFdebugobjtem: no
> group info for section .debug_macro
> /tmp/ccyqoYHFdebugobjtem: file not recognized: Bad value
> collect2: error: ld returned 1 exit status
> lto-wrapper: fatal error: gcc/xgcc returned 1 exit status
> compilation terminated.
> /home/eric/install/gcc/x86_64-suse-linux/bin/ld: error: lto-wrapper failed
Not sure what this is about. Ah, I guess I need to remap GROUP
section indices as well (the GROUP SH_TYPE data).
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Thu, 09 Nov 2017 12:07:00 -0000
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
../gcc/configure --disable-libstdcxx-pch --disable-libvtv --disable-libitm
--disable-libcilkrts --disable-libssp --disable-libgomp --disable-werror
--disable-multilib --enable-languages=c,c++,fortran --enable-checking=release
make -j8 BOOT_CFLAGS="-Wno-error=coverage-mismatch -march=native -O3 -pipe"
STAGE1_CFLAGS="-Wno-error=coverage-mismatch -march=native -O3 -pipe"
CFLAGS_FOR_TARGET="-Wno-error=coverage-mismatch -march=native -O3 -pipe"
CXXFLAGS_FOR_TARGET="-Wno-error=coverage-mismatch -march=native -O3 -pipe"
profiledbootstrap
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Subject: [Bug target/82863] [8 Regression] ICE in verify_flow_info building SH libgcc
Date: Thu, 09 Nov 2017 12:19:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov 9 12:19:02 2017
New Revision: 254574
URL: https://gcc.gnu.org/viewcvs?rev=254574&root=gcc&view=rev
Log:
Initialize split_branch_probability (PR target/82863).
2017-11-09 Martin Liska <mliska@suse.cz>
PR target/82863
* emit-rtl.c (init_emit_regs): Initialize split_branch_probability to
uninitialized.
2017-11-09 Martin Liska <mliska@suse.cz>
PR target/82863
* gcc.dg/pr82863.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr82863.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/emit-rtl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/82902] [8 Regression] ICE verify_ssa failed during GIMPLE pass: phiprop
Date: Thu, 09 Nov 2017 12:23:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 9 12:22:32 2017
New Revision: 254575
URL: https://gcc.gnu.org/viewcvs?rev=254575&root=gcc&view=rev
Log:
2017-11-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/82902
* tree-ssa-phiprop.c (propagate_with_phi): Test proper type.
* g++.dg/torture/pr82902.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr82902.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiprop.c
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Subject: [Bug tree-optimization/82902] [7 Regression] ICE verify_ssa failed during GIMPLE pass: phiprop
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |8.0
Target Milestone|8.0 |7.3
Summary|[8 Regression] ICE |[7 Regression] ICE
|verify_ssa failed during |verify_ssa failed during
|GIMPLE pass: phiprop |GIMPLE pass: phiprop
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar - the issue is latent I think, so I'll backport.
>From gcc-bugs-return-581367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 12:58:45 2017
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Subject: [Bug ada/82844] [8 Regression] Many ada tests time out on x32
Date: Thu, 09 Nov 2017 12:58:00 -0000
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--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Pierre-Marie de Rodat from comment #9)
> I’ve setup an Ubuntu VM, installed libx32 runtime libraries and built with
> “--with-multilib-list=m32,m64,mx32†+ ran the testsuite (“make -C gcc -j8 -k
> check-adaâ€), without reproducing the issues you describe. Is there something
> obvious missing?
I used
CC="gcc -mx32 -fno-lto" CXX="g++ -mx32 -fno-lto"
RUNTESTFLAGS="--target_board='unix{-m64,-m32,}'"
/export/gnu/import/git/sources/gcc/configure --with-demangler-in-ld
--enable-languages=c,c++,fortran,lto,objc,ada,obj-c++,go
--prefix=/usr/gcc-8.0.0-mx32 --with-local-prefix=/usr/local
--enable-gnu-indirect-function --enable-clocale=gnu --with-system-zlib
--enable-checking=yes,rtl --enable-libmpx --with-multilib-list=m32,m64,mx32
--enable-linker-build-id --enable-gnu-unique-object --with-abi=mx32
--with-fpmath=sse
--with-abi=mx32 will bootstrap GCC in x32. You need to make sure that
linker in x32 is your PATH. I have
[hjl@gnu-4 kernel]$ file /usr/localx32/bin/ld
/usr/localx32/bin/ld: ELF 32-bit LSB executable, x86-64, version 1 (SYSV),
dynamically linked, interpreter /libx32/ld-linux-x32.so.2, for GNU/Linux 3.4.0,
BuildID[sha1]=bd1d06d57ab8d91756c97b170430590bac9253ea, with debug_info, not
stripped
[hjl@gnu-4 kernel]$
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/82917] New: [8 regression] 27_io/basic_{f,if,of}stream/open/char/path.cc fails
Date: Thu, 09 Nov 2017 13:07:00 -0000
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Bug ID: 82917
Summary: [8 regression]
27_io/basic_{f,if,of}stream/open/char/path.cc fails
Product: gcc
Version: 8.0
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Target Milestone: ---
r254437 triggers these 3 fails:
spawn -ignore SIGHUP /work/./gcc/xg++ -shared-libgcc -B/work/./gcc -nostdinc++
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/install/x86_64-pc-linux-gnu/bin/ -B/install/x86_64-pc-linux-gnu/lib/
-isystem /install/x86_64-pc-linux-gnu/include -isystem
/install/x86_64-pc-linux-gnu/sys-include
-B/work/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs -fmessage-length=0
-fno-show-column -ffunction-sections -fdata-sections -g -O2 -D_GNU_SOURCE
-DLOCALEDIR="." -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
/source/libstdc++-v3/testsuite/27_io/basic_fstream/open/char/path.cc
-std=gnu++17 -lstdc++fs -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/filesystem/.libs -lm -o ./path.exe
PASS: 27_io/basic_fstream/open/char/path.cc (test for excess errors)
FAIL: 27_io/basic_fstream/open/char/path.cc execution test
---
spawn -ignore SIGHUP /work/./gcc/xg++ -shared-libgcc -B/work/./gcc -nostdinc++
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/install/x86_64-pc-linux-gnu/bin/ -B/install/x86_64-pc-linux-gnu/lib/
-isystem /install/x86_64-pc-linux-gnu/include -isystem
/install/x86_64-pc-linux-gnu/sys-include
-B/work/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs -fmessage-length=0
-fno-show-column -ffunction-sections -fdata-sections -g -O2 -D_GNU_SOURCE
-DLOCALEDIR="." -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
/source/libstdc++-v3/testsuite/27_io/basic_ifstream/open/char/path.cc
-std=gnu++17 -lstdc++fs -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/filesystem/.libs -lm -o ./path.exe
PASS: 27_io/basic_ifstream/open/char/path.cc (test for excess errors)
FAIL: 27_io/basic_ifstream/open/char/path.cc execution test
---
spawn -ignore SIGHUP /work/./gcc/xg++ -shared-libgcc -B/work/./gcc -nostdinc++
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/install/x86_64-pc-linux-gnu/bin/ -B/install/x86_64-pc-linux-gnu/lib/
-isystem /install/x86_64-pc-linux-gnu/include -isystem
/install/x86_64-pc-linux-gnu/sys-include
-B/work/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs -fmessage-length=0
-fno-show-column -ffunction-sections -fdata-sections -g -O2 -D_GNU_SOURCE
-DLOCALEDIR="." -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
/source/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
-std=gnu++17 -lstdc++fs -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/filesystem/.libs -lm -o ./path.exe
PASS: 27_io/basic_ofstream/open/char/path.cc (test for excess errors)
FAIL: 27_io/basic_ofstream/open/char/path.cc execution test
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=slm --with-cpu=slm
>From gcc-bugs-return-581369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 14:05:58 2017
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/82879] [8 regression] ICE in max, at profile-count.h:889
Date: Thu, 09 Nov 2017 14:05:00 -0000
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Nov 9 14:05:14 2017
New Revision: 254582
URL: https://gcc.gnu.org/viewcvs?rev=254582&root=gcc&view=rev
Log:
PR ipa/82879
* ipa-inline-transform.c (update_noncloned_frequencies): Use
profile_count::adjust_for_ipa_scaling.
* tree-inline.c (copy_bb, copy_cfg_body): Likewise.
* profile-count.c (profile_count::adjust_for_ipa_scaling): New member
function.
* profile-count.h (profile_count::adjust_for_ipa_scaling): Declare.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr82879.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline-transform.c
trunk/gcc/profile-count.c
trunk/gcc/profile-count.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
>From gcc-bugs-return-581370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 14:08:11 2017
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Subject: [Bug ipa/82879] [8 regression] ICE in max, at profile-count.h:889
Date: Thu, 09 Nov 2017 14:08:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |hubicka at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 14:13:20 2017
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 14:13:00 -0000
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--- Comment #12 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #8)
> (In reply to rguenther@suse.de from comment #6)
>
> > > In addition to a merge opportunity, there is a redundant move [*], that results
> > > in redundant operation [**]. The whole function could be just:
> > >
> > > movw %dx, -4(%rdi,%rsi)
> > > notl %edx
> > > movw %dx, -2(%rdi,%rsi)
> >
> > or
> >
> > xorl $0xffff0000, %edx
> > movl %edx, -4(%rdi,%rsi)
> >
> > ?
>
> Yes, even this. It looks that store merging opens many optimization
> opportunities.
Actually, the testcase stores the same word (one inverted) to two different
locations. But following testcase:
--cut here--
struct s { char a; char b; char c; char d; };
void foo (struct s *__restrict a, struct s *__restrict b)
{
a->a = b->a;
a->b = b->b;
a->c = ~b->c;
a->d = b->d;
}
--cut here--
This testcase can be optimized by inserting xorl mask between load and store,
as suggested above.
>From gcc-bugs-return-581372-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 14:23:11 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Thu, 09 Nov 2017 14:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems it is et-forest.o that matters, and compiling it with -fno-store-merging
makes the ICE go away.
>From gcc-bugs-return-581373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 14:29:07 2017
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Subject: [Bug c++/81147] [avr] C++ for -mmcu=atmega2560 doesn't do NRVO or RVO when class inherits from empty base
Date: Thu, 09 Nov 2017 14:29:00 -0000
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--- Comment #8 from Felipe Magno de Almeida <felipe at expertisesolutions dot com.br> ---
With GCC 7.2.0 I'm still not seeing the same results as you are. The following
is the assembly result, using the same .cpp file and the same command line:
.section .text._Z3abcv,"ax",@progbits
.global _Z3abcv
.type _Z3abcv, @function
_Z3abcv:
push r28 ; ; 52 pushqi1/1 [length = 1]
push r29 ; ; 53 pushqi1/1 [length = 1]
in r28,__SP_L__ ; ; 54 *movhi/8 [length = 2]
in r29,__SP_H__ ;
sbiw r28,15 ; , ; 55 *addhi3/3 [length = 1]
in __tmp_reg__,__SREG__ ; 56 movhi_sp_r/3 [length = 5]
cli
out __SP_H__,r29 ; ,
out __SREG__,__tmp_reg__
out __SP_L__,r28 ; ,
/* prologue: function */
/* frame size = 15 */
/* stack size = 17 */
.L__stack_usage = 17
ldi r24,lo8(32) ; D.1843, ; 6 movqi_insn/2 [length = 1]
; test.cpp:19: seq(L l, R r) : l(l), r(r) {}
std Y+7,__zero_reg__ ; D.2011.l, ; 37 movqi_insn/3 [length
= 1]
ldi r25,lo8(97) ; D.1843, ; 42 movqi_insn/2 [length = 1]
std Y+8,r25 ; D.2011.l, D.1843 ; 38 movqi_insn/3 [length
= 1]
std Y+9,r24 ; D.2011.l, D.1843 ; 39 movqi_insn/3 [length
= 1]
; test.cpp:25: return { l, r};
std Y+10,r24 ; MEM[(struct seq *)&D.2011 + 4B], D.1843 ; 14
movqi_insn/3 [length = 1]
ldi r24,lo8(5) ; tmp47, ; 15 movqi_insn/2 [length = 1]
movw r30,r28 ; , ; 45 *movhi/1 [length = 1]
adiw r30,6 ; , ; 16 *addhi3/3 [length = 1]
movw r26,r28 ; , ; 46 *movhi/1 [length = 1]
adiw r26,1 ; , ; 17 *addhi3/3 [length = 1]
0: ; 18 movmem_qi [length = 4]
ld r0,Z+ ;
st X+,r0 ;
dec r24 ; tmp47
brne 0b
ldi r24,lo8(5) ; tmp48, ; 19 movqi_insn/2 [length = 1]
movw r30,r28 ; , ; 47 *movhi/1 [length = 1]
adiw r30,1 ; , ; 20 *addhi3/3 [length = 1]
movw r26,r28 ; , ; 48 *movhi/1 [length = 1]
adiw r26,6 ; , ; 21 *addhi3/3 [length = 1]
0: ; 22 movmem_qi [length = 4]
ld r0,Z+ ;
st X+,r0 ;
dec r24 ; tmp48
brne 0b
; test.cpp:35: )
ldi r24,lo8(5) ; tmp49, ; 23 movqi_insn/2 [length = 1]
movw r30,r28 ; , ; 49 *movhi/1 [length = 1]
adiw r30,6 ; , ; 24 *addhi3/3 [length = 1]
movw r26,r28 ; , ; 50 *movhi/1 [length = 1]
adiw r26,11 ; , ; 25 *addhi3/3 [length = 1]
0: ; 26 movmem_qi [length = 4]
ld r0,Z+ ;
st X+,r0 ;
dec r24 ; tmp49
brne 0b
; test.cpp:37: foo(rule);
movw r24,r28 ; , ; 51 *movhi/1 [length = 1]
adiw r24,11 ; , ; 28 addhi3_clobber/1 [length = 1]
call _Z3fooI3seqIS0_I1AS1_ES1_EEvRT_ ; ; 29 call_insn/2
[length = 2]
/* epilogue start */
; test.cpp:38: }
adiw r28,15 ; , ; 59 *addhi3/3 [length = 1]
in __tmp_reg__,__SREG__ ; 60 movhi_sp_r/3 [length = 5]
cli
out __SP_H__,r29 ; ,
out __SREG__,__tmp_reg__
out __SP_L__,r28 ; ,
pop r29 ; ; 61 popqi [length = 1]
pop r28 ; ; 62 popqi [length = 1]
ret ; 63 return_from_epilogue [length = 1]
.size _Z3abcv, .-_Z3abcv
.ident "GCC: (GNU) 7.2.0"
And this is the result if seq no longer inherits from seq_base (which is an
empty class):
.section .text._Z3abcv,"ax",@progbits
.global _Z3abcv
.type _Z3abcv, @function
_Z3abcv:
push r28 ; ; 19 pushqi1/1 [length = 1]
push r29 ; ; 20 pushqi1/1 [length = 1]
; SP -= 3 ; ; 24 *addhi3_sp [length = 1]
rcall .
in r28,__SP_L__ ; ; 25 *movhi/8 [length = 2]
in r29,__SP_H__ ;
/* prologue: function */
/* frame size = 3 */
/* stack size = 5 */
.L__stack_usage = 5
; test.cpp:35: )
ldi r24,lo8(97) ; tmp42, ; 5 movqi_insn/2 [length = 1]
std Y+1,r24 ; MEM[(struct seq *)&rule], tmp42 ; 6
movqi_insn/3 [length = 1]
ldi r24,lo8(32) ; tmp43, ; 7 movqi_insn/2 [length = 1]
std Y+2,r24 ; MEM[(struct seq *)&rule + 1B], tmp43 ; 8
movqi_insn/3 [length = 1]
std Y+3,r24 ; MEM[(struct seq *)&rule + 2B], tmp43 ; 10
movqi_insn/3 [length = 1]
; test.cpp:37: foo(rule);
movw r24,r28 ; , ; 18 *movhi/1 [length = 1]
adiw r24,1 ; , ; 11 *addhi3/3 [length = 1]
call _Z3fooI3seqIS0_I1AS1_ES1_EEvRT_ ; ; 12 call_insn/2
[length = 2]
/* epilogue start */
; test.cpp:38: }
; SP += 3 ; ; 30 *addhi3_sp [length = 3]
pop __tmp_reg__
pop __tmp_reg__
pop __tmp_reg__
pop r29 ; ; 31 popqi [length = 1]
pop r28 ; ; 32 popqi [length = 1]
ret ; 33 return_from_epilogue [length = 1]
.size _Z3abcv, .-_Z3abcv
.ident "GCC: (GNU) 7.2.0"
Which seems to indicate that in avr backend, when a class inherits from another
(be that trivial or not), named return value optimization no longer kicks in
and all return types gets copied.
>From gcc-bugs-return-581374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 15:14:25 2017
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Subject: [Bug libstdc++/82917] [8 regression] 27_io/basic_{f,if,of}stream/open/char/path.cc fails
Date: Thu, 09 Nov 2017 15:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-581375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 15:33:14 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Thu, 09 Nov 2017 15:33:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, reduced testcase for -O2 -fno-tree-dse is like:
struct allocation_pool_list
{
struct allocation_pool_list *next;
};
struct et_node;
struct et_occ
{
struct et_node *of;
struct et_occ *parent, *prev, *next;
int depth;
int min;
struct et_occ *min_occ;
};
struct et_occ *
et_new_occ (struct et_node *node)
{
struct allocation_pool_list *p = __builtin_malloc (sizeof (struct et_occ));
p->next = 0;
struct et_occ *nw = (struct et_occ *)(void *)p;
nw->of = node;
nw->parent = 0;
nw->prev = 0;
nw->next = 0;
nw->depth = 0;
nw->min_occ = nw;
nw->min = 0;
return nw;
}
(the original has some inlined functions and operator new).
And the problem is that r254536 aliasing changes for some reason allow this to
be optimized as:
p_3 = __builtin_malloc (48);
- p_3->next = 0B;
MEM[(struct et_occ *)p_3].of = node_5(D);
+ MEM[(struct et_occ *)p_3].min_occ = p_3;
+ p_3->next = 0B;
MEM[(struct et_occ *)p_3].parent = 0B;
MEM[(struct et_occ *)p_3].prev = 0B;
MEM[(struct et_occ *)p_3].next = 0B;
- MEM[(struct et_occ *)p_3].depth = 0;
- MEM[(struct et_occ *)p_3].min_occ = p_3;
- MEM[(struct et_occ *)p_3].min = 0;
+ MEM[(int *)p_3 + 32B] = 0;
which is wrong, because the p_3->next store is at the same offset/size (i.e.
must alias) as MEM[(struct et_occ *)p_3].of and by moving p_3->next = 0B;
after it the of field will not be whatever has been passed, but NULL instead.
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 15:35:00 -0000
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--- Comment #13 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #12)
> --cut here--
> struct s { char a; char b; char c; char d; };
>
> void foo (struct s *__restrict a, struct s *__restrict b)
> {
> a->a = b->a;
> a->b = b->b;
> a->c = ~b->c;
> a->d = b->d;
> }
> --cut here--
>
> This testcase can be optimized by inserting xorl mask between load and
> store, as suggested above.
Also,
a->a = 0;
a->b = 0;
a->c = b->c;
a->d = 0;
could use andl mask, and similar
a->a = 0xff;
a->b = 0xff;
a->c = b->c;
a->d = 0xff;
could use orl mask.
>From gcc-bugs-return-581377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 15:40:53 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What the code does is when seeing the MEM[(struct et_occ *)p_3].of = node_5(D);
store, we go through all current chains (there is exactly one at that point)
and for each chain through all their stmts and do:
961 if (ref_maybe_used_by_stmt_p (stmt, gimple_assign_lhs
(info->stmt))
962 || stmt_may_clobber_ref_p (stmt, gimple_assign_lhs
(info->stmt)))
stmt here is MEM[(struct et_occ *)p_3].of = node_5(D); and info->stmt is
p_3->next = 0B;
And because both of these functions return false, we think there can't be any
aliasing.
We want to make sure that if there are any (valid) uses of the memory set by
the info->stmt store, or if we are overwriting any part of the info->stmt lhs
memory in stmt that we terminate the chain.
Are these functions not the right alias functions to call?
>From gcc-bugs-return-581378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 15:41:40 2017
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Subject: [Bug middle-end/82918] New: No aliasing is possible on non equal pointers
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Bug ID: 82918
Summary: No aliasing is possible on non equal pointers
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Following code
struct array {
int data[3];
};
void foo2(array& value, const array& value2) {
if (&value == &value2) return;
value.data[0] = value2.data[0];
value.data[1] = value2.data[0];
value.data[2] = value2.data[0];
}
produces the following assembly:
foo2(array&, array const&):
cmp rdi, rsi
je .L1
mov eax, DWORD PTR [rsi]
mov DWORD PTR [rdi], eax
mov eax, DWORD PTR [rsi] <=== This is not required
mov DWORD PTR [rdi+4], eax
mov DWORD PTR [rdi+8], eax
.L1:
rep ret
GCC already understands that value.data[1] and value.data[2] do not alias with
value2.data[0].
However GCC assumes that value1.data[0] may alias value2.data[0], which is not
possible, because of `if (&value == &value2) return;`
Please add the optimization, as it affects many cases, especially C++ assign
and move assign operators, where checking for `this == &rhs` is a common
pattern.
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Subject: [Bug c/82919] New: Docs don't mention -Wimplicit-int is enabled in C99 mode
Date: Thu, 09 Nov 2017 16:21:00 -0000
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mode
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-Wimplicit-int is enabled by default in C99 mode (or later) just like
-Wimplicit-function-declaration. This is not documented (e.g.
https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Warning-Options.html):
----
-Wimplicit-int (C and Objective-C only)
Warn when a declaration does not specify a type. This warning is enabled by
-Wall.
-Wimplicit-function-declaration (C and Objective-C only)
Give a warning whenever a function is used before being declared. In C99
mode (-std=c99 or -std=gnu99), this warning is enabled by default and it is
made into an error by -pedantic-errors. This warning is also enabled by -Wall.
-Wimplicit (C and Objective-C only)
Same as -Wimplicit-int and -Wimplicit-function-declaration. This warning
is enabled by -Wall.
----
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Subject: [Bug testsuite/82920] New: cet test failures on darwin
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Bug ID: 82920
Summary: cet test failures on darwin
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The following tests are failing on x86_64-apple-darwin16 with both -m32 and
-m64:
FAIL: g++.dg/cet-notrack-1.C -std=gnu++11 scan-assembler-times \\tcall[
\\t]+puts 2 (found 0 times)
FAIL: g++.dg/cet-notrack-1.C -std=gnu++14 scan-assembler-times \\tcall[
\\t]+puts 2 (found 0 times)
FAIL: g++.dg/cet-notrack-1.C -std=gnu++98 scan-assembler-times \\tcall[
\\t]+puts 2 (found 0 times)
FAIL: gcc.target/i386/cet-notrack-icf-1.c scan-assembler set[ \\t]+fn2,fn1
FAIL: gcc.target/i386/cet-notrack-icf-1.c scan-assembler set[ \\t]+fn3,fn1
FAIL: gcc.target/i386/cet-notrack-icf-2.c scan-assembler set[ \\t]+fn2,fn1
FAIL: gcc.target/i386/cet-notrack-icf-3.c scan-assembler set[ \\t]+fn2,fn1
FAIL: gcc.target/i386/cet-notrack-icf-3.c scan-assembler set[ \\t]+fn3,fn1
FAIL: gcc.target/i386/cet-notrack-icf-4.c scan-assembler set[ \\t]+fn3,fn1
FAIL: gcc.target/i386/cet-sjlj-3.c scan-assembler-times call\\tlongjmp 1 (found
0 times)
FAIL: gcc.target/i386/cet-sjlj-5.c scan-assembler-times call\\tlongjmp 1 (found
0 times)
In addition the following tests fail with -m32:
FAIL: gcc.target/i386/cet-notrack-5a.c scan-assembler-not \\tcall[ \\t]+
FAIL: gcc.target/i386/cet-notrack-5b.c scan-assembler-times \\tcall[ \\t]+ 1
(found 2 times)
FAIL: gcc.target/i386/cet-notrack-6b.c scan-assembler-not \\tcall[ \\t]+
The following patch fixes the corresponding tests, but I have no idea about
what to do with the others:
--- ../_clean/gcc/testsuite/g++.dg/cet-notrack-1.C 2017-10-26
07:16:20.000000000 +0200
+++ gcc/testsuite/g++.dg/cet-notrack-1.C 2017-11-08 23:51:55.000000000
+0100
@@ -1,7 +1,7 @@
/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-fcf-protection -mcet" } */
/* { dg-final { scan-assembler "endbr32|endbr64" } } */
-/* { dg-final { scan-assembler-times "\tcall\[ \t]+puts" 2 } } */
+/* { dg-final { scan-assembler-times "\tcall\[ \t]+_?puts" 2 } } */
/* { dg-final { scan-assembler-times "notrack call\[ \t]+" 1 } } */
#include <stdio.h>
--- ../_clean/gcc/testsuite/gcc.target/i386/cet-sjlj-3.c 2017-10-26
07:16:18.000000000 +0200
+++ gcc/testsuite/gcc.target/i386/cet-sjlj-3.c 2017-11-08 23:55:15.000000000
+0100
@@ -3,7 +3,7 @@
/* { dg-final { scan-assembler-times "endbr32" 4 { target ia32 } } } */
/* { dg-final { scan-assembler-times "endbr64" 4 { target { ! ia32 } } } } */
/* { dg-final { scan-assembler-times "call _?setjmp" 1 } } */
-/* { dg-final { scan-assembler-times "call longjmp" 1 } } */
+/* { dg-final { scan-assembler-times "call _?longjmp" 1 } } */
#include <stdio.h>
#include <setjmp.h>
--- ../_clean/gcc/testsuite/gcc.target/i386/cet-sjlj-5.c 2017-10-26
07:16:18.000000000 +0200
+++ gcc/testsuite/gcc.target/i386/cet-sjlj-5.c 2017-11-08 23:55:30.000000000
+0100
@@ -3,7 +3,7 @@
/* { dg-final { scan-assembler-times "endbr32" 2 { target ia32 } } } */
/* { dg-final { scan-assembler-times "endbr64" 2 { target { ! ia32 } } } } */
/* { dg-final { scan-assembler-times "call _?setjmp" 1 } } */
-/* { dg-final { scan-assembler-times "call longjmp" 1 } } */
+/* { dg-final { scan-assembler-times "call _?longjmp" 1 } } */
#include <stdio.h>
#include <setjmp.h>
>From gcc-bugs-return-581381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 16:36:01 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82921] New: libsanitizer build failure on darwin10 (Snow Leopard) due to missing VM_MEMORY_OS_ALLOC_ONCE
Date: Thu, 09 Nov 2017 16:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82921
Bug ID: 82921
Summary: libsanitizer build failure on darwin10 (Snow Leopard)
due to missing VM_MEMORY_OS_ALLOC_ONCE
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Bootstrapping gcc on darwin10 fails with
libtool: compile: /opt/gcc/build_w/./gcc/xgcc -shared-libgcc
-B/opt/gcc/build_w/./gcc -nostdinc++
-L/opt/gcc/build_w/x86_64-apple-darwin10.8.0/libstdc++-v3/src
-L/opt/gcc/build_w/x86_64-apple-darwin10.8.0/libstdc++-v3/src/.libs
-L/opt/gcc/build_w/x86_64-apple-darwin10.8.0/libstdc++-v3/libsupc++/.libs
-B/opt/gcc/gcc8w/x86_64-apple-darwin10.8.0/bin/
-B/opt/gcc/gcc8w/x86_64-apple-darwin10.8.0/lib/ -isystem
/opt/gcc/gcc8w/x86_64-apple-darwin10.8.0/include -isystem
/opt/gcc/gcc8w/x86_64-apple-darwin10.8.0/sys-include -D_GNU_SOURCE -D_DEBUG
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I.
-I../../../../work/libsanitizer/lsan -I.. -I
../../../../work/libsanitizer/include -I ../../../../work/libsanitizer -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 -I../../libstdc++-v3/include
-I../../libstdc++-v3/include/x86_64-apple-darwin10.8.0
-I../../../../work/libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11 -g -O2
-MT lsan_common_mac.lo -MD -MP -MF .deps/lsan_common_mac.Tpo -c
../../../../work/libsanitizer/lsan/lsan_common_mac.cc -fno-common -DPIC -o
.libs/lsan_common_mac.o
In file included from
../../../../work/libsanitizer/sanitizer_common/sanitizer_allocator.h:15:0,
from ../../../../work/libsanitizer/lsan/lsan_common.h:16,
from ../../../../work/libsanitizer/lsan/lsan_common_mac.cc:14:
../../../../work/libsanitizer/lsan/lsan_common_mac.cc: In function 'void
__lsan::ProcessGlobalRegions(__lsan::Frontier*)':
../../../../work/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:307:33:
warning: division 'sizeof (const char*) / sizeof (const char)' does not compute
the number of array elements [-Wsizeof-pointer-div]
#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
~~~~~~~~~^~~~~~~~~~~~~~~
../../../../work/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:264:46:
note: in definition of macro 'CHECK_IMPL'
__sanitizer::u64 v1 = (__sanitizer::u64)(c1); \
^~
../../../../work/libsanitizer/lsan/lsan_common_mac.cc:110:38: note: in
expansion of macro 'CHECK'
for (auto name : kSkippedSecNames) CHECK(ARRAY_SIZE(name) < kMaxSegName);
^~~~~
../../../../work/libsanitizer/lsan/lsan_common_mac.cc:110:44: note: in
expansion of macro 'ARRAY_SIZE'
for (auto name : kSkippedSecNames) CHECK(ARRAY_SIZE(name) < kMaxSegName);
^~~~~~~~~~
../../../../work/libsanitizer/lsan/lsan_common_mac.cc:110:13: note: first
'sizeof' operand was declared here
for (auto name : kSkippedSecNames) CHECK(ARRAY_SIZE(name) < kMaxSegName);
^~~~
../../../../work/libsanitizer/lsan/lsan_common_mac.cc: In function 'void
__lsan::ProcessPlatformSpecificAllocations(__lsan::Frontier*)':
../../../../work/libsanitizer/lsan/lsan_common_mac.cc:158:26: error:
'VM_MEMORY_OS_ALLOC_ONCE' was not declared in this scope
if (info.user_tag == VM_MEMORY_OS_ALLOC_ONCE) {
^~~~~~~~~~~~~~~~~~~~~~~
../../../../work/libsanitizer/lsan/lsan_common_mac.cc:158:26: note: suggested
alternative: 'VM_MEMORY_MALLOC_HUGE'
if (info.user_tag == VM_MEMORY_OS_ALLOC_ONCE) {
^~~~~~~~~~~~~~~~~~~~~~~
VM_MEMORY_MALLOC_HUGE
make[4]: *** [lsan_common_mac.lo] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-target-libsanitizer] Error 2
make: *** [all] Error 2
Last revision bootstrapped is r253320, r254168 failed.
This could be a duplicate of/related to pr82829.
>From gcc-bugs-return-581382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 16:43:20 2017
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From: "antox at ml dot lv" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82922] New: Request: add -Wstrict-prototypes to -Wextra as K&R style is obsolescent
Date: Thu, 09 Nov 2017 16:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82922
Bug ID: 82922
Summary: Request: add -Wstrict-prototypes to -Wextra as K&R
style is obsolescent
Product: gcc
Version: unknown
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K&R style function declarations and definitions are marked obsolescent (C89
3.9.4,5, C99 6.11.6,7, C11 6.11.6,7). Maybe it is reasonable to include
-Wstrict-prototypes in -Wextra (before it becomes appropriate in -Wall)?
K&R style still can be encountered in the wild and, to someone uninitiated, may
appear like a less cluttered alternative. gcc-5.3.0 -Wall -Wextra compiles the
following code without warning about missing prototype and unchecked arguments:
double f(t, x, y)
double t, x, y;
{ }
int main(void) {
//f(0.0, 1.0, 1.0);
f(0, 1, 1); // UB
}
Unprototyped functions can be diagnosed by combining
-Wimplicit-function-declaration and -Wstrict-prototypes. The former is in -Wall
and imposed since C99.
-Wold-style-definition cases are covered by -Wstrict-prototypes too.
-Wold-style-declaration (obsolescent: C89 3.9.3, C99 6.11.5, C11 6.11.5) is
included in -Wextra.
There has been a bit of discussion on gcc-help:
https://gcc.gnu.org/ml/gcc-help/2017-11/msg00001.html
>From gcc-bugs-return-581383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 16:43:55 2017
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From: "werner.blokbuster at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82923] New: Automatic allocation of deferred length character using function result
Date: Thu, 09 Nov 2017 16:43:00 -0000
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Bug ID: 82923
Summary: Automatic allocation of deferred length character
using function result
Product: gcc
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I can't believe that this isn't a duplicate although I can't find it. The
following code gives an ICE for me on gfortran 7.2, if the line
mine=getchars(2,4) is included:
module m
implicit none
contains
function getchars(my_len,my_size)
integer, intent(in) :: my_len, my_size
character(my_len) :: getchars(my_size)
getchars = 'A-'
end function getchars
end module m
program testca
use m, only: getchars
implicit none
character(:), allocatable :: mine(:)
! this works:
write(*,*) getchars(2,4)
write(*,*) len(getchars(2,4))
write(*,*) size(getchars(2,4))
! this works:
mine = [character(2) :: 'A-','A-']
write(*,*) mine
! ICE occurs if this line is included:
mine = getchars(2,4)
end program testca
WB
>From gcc-bugs-return-581384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 16:45:32 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Thu, 09 Nov 2017 16:45:00 -0000
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #13)
> (In reply to Uroš Bizjak from comment #12)
>
> > --cut here--
> > struct s { char a; char b; char c; char d; };
> >
> > void foo (struct s *__restrict a, struct s *__restrict b)
> > {
> > a->a = b->a;
> > a->b = b->b;
> > a->c = ~b->c;
> > a->d = b->d;
> > }
> > --cut here--
> >
> > This testcase can be optimized by inserting xorl mask between load and
> > store, as suggested above.
>
> Also,
>
> a->a = 0;
> a->b = 0;
> a->c = b->c;
> a->d = 0;
>
> could use andl mask, and similar
>
> a->a = 0xff;
> a->b = 0xff;
> a->c = b->c;
> a->d = 0xff;
>
> could use orl mask.
I'm not entirely sure if we can do this last thing, because the original just
reads from b->c, if b->d or b->{a,b} could trap while b->c doesn't (such as for
the 32-bit load not being aligned). At least for the BIT_NOT_EXPR vs. missing
BIT_NOT_EXPR cases with some effort supporting it wouldn't be that difficult,
we'd need to replace the optional BIT_NOT_EXPR with BIT_XOR_EXPR computed
bitmasks based on what stores have them and what don't (in any of the 3 spots
with bit_not_p).
Trying to support something else, like
a->a = b->a | 123;
a->b = b->b & 12;
a->c = b->c ^ 14;
would be harder, but in theory possible.
In any case, none of this needs the bswap infrastructure, while some of the
earlier testcases do need.
>From gcc-bugs-return-581385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 16:56:48 2017
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Subject: [Bug ipa/82903] [8 regression] gcc.dg/tree-prof/20050826-2.c fail
Date: Thu, 09 Nov 2017 16:56:00 -0000
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--- Comment #3 from Sudakshina Das <sudi.das at arm dot com> ---
Confirmed on aarch64-none-linux-gnu and arm-none-linux-gnueabihf
>From gcc-bugs-return-581386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:04:46 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
Date: Thu, 09 Nov 2017 17:04:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dominiq at lps dot ens.fr
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 82921 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-581387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:04:49 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82921] libsanitizer build failure on darwin10 (Snow Leopard) due to missing VM_MEMORY_OS_ALLOC_ONCE
Date: Thu, 09 Nov 2017 17:04:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 82824 ***
>From gcc-bugs-return-581388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:07:23 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82923] Automatic allocation of deferred length character using function result
Date: Thu, 09 Nov 2017 17:07:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0). Note that if the compiler is configured
with --enable-checking=yes, I get
pr82923.f90:11:0:
program testca
Error: Local declaration from a different function
..__result
pr82923.f90:27:0:
mine = getchars(2,4)
note: in statement
.mine = ..__result;
pr82923.f90:11:0:
program testca
Error: Local declaration from a different function
..__result
pr82923.f90:27:0:
mine = getchars(2,4)
note: in statement
_101 = (integer(kind=8)) ..__result;
pr82923.f90:11:0:
program testca
Error: Local declaration from a different function
..__result
pr82923.f90:27:0:
mine = getchars(2,4)
note: in statement
D.3753 = (sizetype) ..__result;
during GIMPLE pass: cfg
pr82923.f90:11:0:
program testca
internal compiler error: verify_gimple failed
instead of
during RTL pass: expand
pr82923.f90:27:0:
mine = getchars(2,4)
internal compiler error: in expand_expr_real_1, at expr.c:9865
for 5.5.0 to 8.0 and
pr82923.f90:27:0: internal compiler error: in gimplify_var_or_parm_decl, at
gimplify.c:1741
mine = getchars(2,4)
^
for 4.8 and 4.9.
No duplicate in store.
>From gcc-bugs-return-581389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:11:08 2017
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Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
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>From gcc-bugs-return-581390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:20:42 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Thu, 09 Nov 2017 17:20:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42567
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42567&action=edit
gcc8-pr82916.patch
Untested fix.
>From gcc-bugs-return-581391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 17:22:17 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81685] FAIL: g++.dg/debug/dwarf2/inline-ns-2.C -std=gnu++* (internal compiler error) on darwin
Date: Thu, 09 Nov 2017 17:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Still present at revision r254598.
>From gcc-bugs-return-581392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 18:46:07 2017
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Subject: [Bug fortran/78814] ICE in symbol_rank, at fortran/interface.c:1265
Date: Thu, 09 Nov 2017 18:46:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Thu Nov 9 18:45:29 2017
New Revision: 254604
URL: https://gcc.gnu.org/viewcvs?rev=254604&root=gcc&view=rev
Log:
2017-11-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78814
* interface.c (symbol_rank): Check for NULL pointer.
2017-11-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78814
* gfortran.dg/interface_40.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/interface_40.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/interface.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 18:55:46 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug jit/82846] [8 regression] jit.dg test-alignment.c.exe, test-combination.c.exe, test-threads.c.exe fails
Date: Thu, 09 Nov 2017 18:55:00 -0000
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--- Comment #3 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
No, the patch you mentioned does not fix the issue.
The output I get is listed here:
.file "fake.c"
.text
.Ltext0:
.p2align 4,,15
.globl test_aligned_reading_s2
.type test_aligned_reading_s2, @function
test_aligned_reading_s2:
.LFB0:
.cfi_startproc
.LVL0:
movb (%rdi), %al
mulb 2(%rdi)
ret
.cfi_endproc
.LFE0:
.size test_aligned_reading_s2, .-test_aligned_reading_s2
.p2align 4,,15
.globl test_aligned_writing_s2
.type test_aligned_writing_s2, @function
test_aligned_writing_s2:
.LFB1:
.cfi_startproc
.LVL1:
movb $5, (%rdi)
movb $7, 2(%rdi)
jmp test_aligned_reading_s2@PLT
.LVL2:
.cfi_endproc
.LFE1:
.size test_aligned_writing_s2, .-test_aligned_writing_s2
.p2align 4,,15
.globl test_aligned_reading_s4
.type test_aligned_reading_s4, @function
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Subject: [Bug fortran/78619] [6/7/8 Regression] ICE in copy_reference_ops_from_ref, at tree-ssa-sccvn.c:889
Date: Thu, 09 Nov 2017 19:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78619
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Thu Nov 9 19:12:41 2017
New Revision: 254605
URL: https://gcc.gnu.org/viewcvs?rev=254605&root=gcc&view=rev
Log:
2017-11-09 Paul Thomas <pault@gcc.gnu.org>
PR fortran/78619
* check.c (same_type_check): Introduce a new argument 'assoc'
with default value false. If this is true, use the symbol type
spec of BT_PROCEDURE expressions.
(gfc_check_associated): Set 'assoc' true in the call to
'same_type_check'.
2017-11-09 Paul Thomas <pault@gcc.gnu.org>
PR fortran/78619
* gfortran.dg/pr78619.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr78619.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/check.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 19:29:03 2017
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78686] ICE in gfc_apply_init, at fortran/expr.c:4124
Date: Thu, 09 Nov 2017 19:29:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to Gerhard Steinmetz from comment #0)
> With invalid code, down to at least 4.8 :
>
>
> $ cat z1.f90
> program p
> type t
> character :: c(1) = [t()]
> end type
> end
>
>
> $ gfortran-7-20161204 z1.f90
> f951: internal compiler error: in gfc_apply_init, at fortran/expr.c:4124
> 0x6911be gfc_apply_init(gfc_typespec*, symbol_attribute*, gfc_expr*)
> ../../gcc/fortran/expr.c:4124
> 0x684d98 build_struct
> ../../gcc/fortran/decl.c:1942
> 0x684d98 variable_decl
> ../../gcc/fortran/decl.c:2437
> 0x684d98 gfc_match_data_decl()
> ../../gcc/fortran/decl.c:4892
> 0x6dca79 match_word_omp_simd
> ../../gcc/fortran/parse.c:93
> 0x6e002e match_word
> ../../gcc/fortran/parse.c:377
> 0x6e002e decode_statement
> ../../gcc/fortran/parse.c:377
> 0x6e1e34 next_free
> ../../gcc/fortran/parse.c:1180
> 0x6e1e34 next_statement
> ../../gcc/fortran/parse.c:1413
> 0x6e337a parse_derived
> ../../gcc/fortran/parse.c:3233
> 0x6e337a parse_spec
> ../../gcc/fortran/parse.c:3773
> 0x6e5bb3 parse_progunit
> ../../gcc/fortran/parse.c:5615
> 0x6e71a4 gfc_parse_file()
> ../../gcc/fortran/parse.c:6124
> 0x72b182 gfc_be_parse_file
> ../../gcc/fortran/f95-lang.c:202
With up to date trunk (GNU Fortran (GCC) 8.0.0 20171109),
I see
% gfcx -c a.f90
a.f90:3:31:
character :: c(1) = [t()]
1
Error: Derived type 't' at (1) is being used before it is defined
I see the same error for the code in comment #2. I'll prepare
testcases and commit those later today or tomorrow.
>From gcc-bugs-return-581396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 20:02:07 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82333] [8 Regression] powerpc64le _Float128 ICE in as_a, at machmode.h:345
Date: Thu, 09 Nov 2017 20:02:00 -0000
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 9 20:01:29 2017
New Revision: 254607
URL: https://gcc.gnu.org/viewcvs?rev=254607&root=gcc&view=rev
Log:
fix pr 82333
Added:
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/pr82333.c
Modified:
branches/ibm/ieee/gcc/ChangeLog.meissner
branches/ibm/ieee/gcc/builtins.c
branches/ibm/ieee/gcc/builtins.def
branches/ibm/ieee/gcc/c/c-decl.c
branches/ibm/ieee/gcc/config/rs6000/rs6000.md
branches/ibm/ieee/gcc/convert.c
branches/ibm/ieee/gcc/fold-const-call.c
branches/ibm/ieee/gcc/fold-const.c
branches/ibm/ieee/gcc/internal-fn.def
branches/ibm/ieee/gcc/testsuite/ChangeLog.meissner
branches/ibm/ieee/gcc/testsuite/gcc.target/powerpc/float128-hw2.c
branches/ibm/ieee/gcc/varasm.c
>From gcc-bugs-return-581397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 20:06:17 2017
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Subject: [Bug c++/82924] New: gcc gives no warning for comparing unsigned integer < 0 even with -Wextra enabled
Date: Thu, 09 Nov 2017 20:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82924
Bug ID: 82924
Summary: gcc gives no warning for comparing unsigned integer <
0 even with -Wextra enabled
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 42568
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42568&action=edit
Compiling this file with -Wtype-limits should give a warning, but does not.
Take the following code
#include <iostream>
template<typename T>
T f(T x, unsigned y) {
if (y < 0) return x;
return static_cast<T>(0);
}
using namespace std;
int main() {
int a = f(2, 3);
std::cout << a << std::endl;
return 0;
}
where function f clearly always returns 0. Compiling it with g++-7.2.0 -Wall
-Wextra gives no hint about pointless comparison. However, clang warns us
nicely:
a.cpp:7:11: warning: comparison of unsigned expression < 0 is always false
[-Wtautological-compare]
if (y < 0) return x;
~ ^ ~
1 warning generated.
I believe that using -Wtype-limits (part of -Wextra) should warn about this
case, as it does in the non-template version.
>From gcc-bugs-return-581398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 20:43:30 2017
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Subject: [Bug c/82919] Docs don't mention -Wimplicit-int is enabled in C99 mode
Date: Thu, 09 Nov 2017 20:43:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-09
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.4.0, 6.4.0, 7.2.0, 8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the top of trunk (GCC 8.0) back through to GCC 5.4.
$ cat c.c && gcc -S c.c
f (void)
{
g ();
}
c.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
f (void)
^
c.c: In function ‘f’:
c.c:3:3: warning: implicit declaration of function ‘g’
[-Wimplicit-function-declaration]
g ();
^
>From gcc-bugs-return-581400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 20:54:21 2017
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From: "EoD at xmw dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/82926] New: x86_64 inline assembly with push/pop produces buggy code
Date: Thu, 09 Nov 2017 20:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82926
Bug ID: 82926
Summary: x86_64 inline assembly with push/pop produces buggy
code
Product: gcc
Version: unknown
URL: https://bugs.freedesktop.org/show_bug.cgi?id=99066
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: EoD at xmw dot de
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Created attachment 42569
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42569&action=edit
C++ program showing the issue
Currently, pulseaudio fails compiling with "-O0" due to a crash in its
get_cpuid() function (see URL above for further details).
I attached a simple C++ program to show the issue.
When compiling the program with "-O0" a segfault is caused
g++ -mx32 -O0 get_cpuid_crash.cpp
When compiling the program with either "-O1" or "-m64", the program does not
segfault:
g++ -mx32 -O1 get_cpuid_crash.cpp
g++ -m64 -O0 get_cpuid_crash.cpp
Also using clang does not cause a segfault
clang++ -mx32 -O0 get_cpuid_crash.cpp
I would also like to quote tanuk from
https://bugs.freedesktop.org/show_bug.cgi?id=99066#c14
> I was asked for more information about the cpuid crash, so here we go:
>
> This is the code that GCC generates for get_cpuid() on x32:
>
> 0xf7b6a270 <get_cpuid> push %rbp
> 0xf7b6a271 <get_cpuid+1> mov %esp,%ebp
> 0xf7b6a273 <get_cpuid+3> mov %edi,-0x4(%ebp)
> 0xf7b6a277 <get_cpuid+7> mov %rcx,%rax
> 0xf7b6a27a <get_cpuid+10> mov %r8,%rcx
> 0xf7b6a27d <get_cpuid+13> mov %esi,-0x8(%ebp)
> 0xf7b6a281 <get_cpuid+17> mov %edx,-0xc(%ebp)
> 0xf7b6a285 <get_cpuid+21> mov %eax,-0x10(%ebp)
> 0xf7b6a289 <get_cpuid+25> mov %ecx,-0x14(%ebp)
> 0xf7b6a28d <get_cpuid+29> mov -0x4(%ebp),%eax [breakpoint]
> 0xf7b6a291 <get_cpuid+33> push %rbx
> 0xf7b6a292 <get_cpuid+34> cpuid
> 0xf7b6a294 <get_cpuid+36> mov %ebx,%esi
> 0xf7b6a296 <get_cpuid+38> pop %rbx
> 0xf7b6a297 <get_cpuid+39> mov -0x8(%ebp),%edi
> 0xf7b6a29b <get_cpuid+43> mov %eax,(%edi) [segfault]
> 0xf7b6a29e <get_cpuid+46> mov -0xc(%ebp),%eax
> 0xf7b6a2a2 <get_cpuid+50> mov %esi,(%eax)
> 0xf7b6a2a5 <get_cpuid+53> mov -0x10(%ebp),%eax
> 0xf7b6a2a9 <get_cpuid+57> mov %ecx,(%eax)
> 0xf7b6a2ac <get_cpuid+60> mov -0x14(%ebp),%eax
>
> "[breakpoint]" marks the place where the execution stops if you set a
> breakpoint with "break get_cpuid". "[segfault]" marks the place where the
> crash happens.
>
> Before the breakpoint there's the code that copies the function parameters
> to the stack as follows:
>
> %edi is the "op" parameter. It's saved to -0x4(%ebp).
> %rcx is the "c" parameter. It's moved to %rax and from %rax to -0x10(%ebp).
> %r8 is the "d" parameter. It's moved to %rcx and from %rcx to -0x14(%ebp).
> %esi is the "a" parameter. It's saved to -0x8(%ebp).
> %edx is the "b" parameter. It's saved to -0xc(%ebp).
>
> The stack pointer is not updated when the parameters are saved to the stack.
> Since the stack pointer points to the beginning of the frame, the push
> instruction overwrites 8 bytes from the beginning of the frame, overwriting
> the "op" and "a" parameters.
>
> I think the push is done, because the %rbx register is special in that it
> must always have the same value when returning from a function as it had
> when the function started. The cpuid instruction modifies the %rbx register,
> so that's why we need to save and restore the %rbx register.
>
> After the pop, this happens:
>
> 0xf7b6a297 <get_cpuid+39> mov -0x8(%ebp),%edi
>
> This reads the stack from the position where the "a" parameter was saved.
> The compiler seems to assume that it has the same value that was written
> there in the beginning of the function, but the push instruction has written
> some random garbage there.
>
> 0xf7b6a29b <get_cpuid+43> mov %eax,(%edi) [segfault]
>
> This is supposed to save the return value (well, one part of the return
> value) of the cpuid instruction to the address stored in %edi, but we just
> wrote garbage to %edi, so we end up dereferencing using garbage as the
> pointer (in my tests the value in %edi was 1).
>From gcc-bugs-return-581399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 20:54:02 2017
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Subject: [Bug other/82925] New: [8 regression] gcc.dg/tree-ssa/vrp101.c fails starting with r254379
Date: Thu, 09 Nov 2017 20:54:00 -0000
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Summary: [8 regression] gcc.dg/tree-ssa/vrp101.c fails starting
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I am seeing this on both LE and BE powerpc64.
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-ssa/vrp101.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -fdump-tree-optimized
-S -o vrp101.s
PASS: gcc.dg/tree-ssa/vrp101.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/vrp101.c scan-tree-dump optimized "<bb 2> \\[[0-9.]+%\\]
\\[count: [0-9INV]*\\]:[\n\r ]*return 0;"
testcase /home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-ssa/tree-ssa.exp
completed in 0 seconds
=== gcc Summary ===
# of expected passes 1
# of unexpected failures 1
>From gcc-bugs-return-581401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 21:39:22 2017
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Subject: [Bug fortran/78746] charlen_03, charlen_10 ICE
Date: Thu, 09 Nov 2017 21:39:00 -0000
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--- Comment #11 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I confirm that charlen_15 now compiles & executes OK for me.
charlen_03 and charlen_10 have been removed, so they no longer fail :-)
>From gcc-bugs-return-581402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 21:47:18 2017
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Subject: [Bug middle-end/82333] [8 Regression] powerpc64le _Float128 ICE in as_a, at machmode.h:345
Date: Thu, 09 Nov 2017 21:47:00 -0000
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----------------------------------------------------------------------------
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Component|target |middle-end
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
The bug is due to compare_constant thinking two floating point constants are
the same if the floating point size and the internal value are the same. On
the PowerPC, long double and _Float128 both are 128-bits, but they have
different internal representations.
The bug shows up when you try to inline two functions, one that returns 0
converted to long double _Complex and the other that returns 0 converted to
_Float128 _Complex.
The function compare_constant in varasm.c thinks that these two constants are
the same, and assigns them to the same hash. When inliner tries to replace the
inline function (that returns 0) with the constant, it does moves of the real
part and the imaginary part. In the second function, the real/imaginary parts
have type KFmode, while the first function (that has the saved constant) the
real/imaginary parts have type TFmode.
The fix is to consider the type along with the precision when doing hash of the
constants.
>From gcc-bugs-return-581403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 21:53:18 2017
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Subject: [Bug middle-end/82333] [8 Regression] powerpc64le _Float128 ICE in as_a, at machmode.h:345
Date: Thu, 09 Nov 2017 21:53:00 -0000
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Note the checkin message in note 2 was for a private branch, that included
other patches that have been submitted.
>From gcc-bugs-return-581404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 22:39:50 2017
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Subject: [Bug target/82926] x86_64 inline assembly with push/pop produces buggy code
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
The testcase violates redzone.
Either add rsp to the list of clobbered registers, or compile with
-fno-red-zone.
OTOH, you should just include <cpuid.h> and use __cpuid.
>From gcc-bugs-return-581405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 22:50:36 2017
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Subject: [Bug fortran/82895] An internal routine used in a parallel section (OpenMP) does not get the values of thread-private variables
Date: Thu, 09 Nov 2017 22:50:00 -0000
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--- Comment #5 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Arjen Markus from comment #4)
> It was precisely this sort of issues that led me to write this small sample
> program. And I realised this morning, that indeed the host variables need to
> be avoided.
The OpenMP standard says that host or use associated variables are
shared. For q, this means that different threads would access this
variable, i.e. you get a data race.
> But does:
> - loop_body accesses the host-associated, non-threadprivate variables q,
> x, and id, and you get data races
>
> mean that it is utterly unsafe to access even the shared variables (x and id
> in this case)? That would defy the intentions of using a(n internal) routine
> altogether. I need to have access to the entire array and the pattern of
> iterations avoids data collisions.
For your code and for your iteration pattern (different threads will use
different j ranges), you could declare q in the main as threadprivate,
(now gfortran-7 complains that it should be save'd), and you should pass
the private variables i and j to your worker subroutine.
Try the following (checked with valgrind):
! chkloop_internal.f90 --
! I want to know:
! - OpenMP-enabled outer loops with a small number of iterations (but a
large body with long loops)
! - Combination with internal routines
!
program chkloop_internal
use omp_lib
implicit none
integer, parameter :: noelems = 100000
real, dimension(:), allocatable :: x, y, z
integer, dimension(:), allocatable :: id
integer :: i, j, noperlayer, nolayers
!$omp threadprivate(q)
real, save :: q
allocate( x(noelems), y(noelems), z(noelems), id(noelems) )
id = 0
call random_number( x )
call random_number( y )
call random_number( z )
nolayers = 10
noperlayer = noelems / nolayers
!$omp parallel private(i, j)
!$omp do schedule(dynamic)
do i = 1,nolayers
do j = noperlayer * (i - 1) + 1, noperlayer * i
call loop_body (i,j)
enddo
enddo
!$omp end do
!$omp end parallel
do i = 1,omp_get_max_threads()
write(*,*) i, count( id == i-1 )
enddo
contains
subroutine loop_body (i,j)
integer :: i, j
! real :: q ! use local variables if possible
q = z(j)
x(j) = x(j) + q * y(j)
id(j) = omp_get_thread_num()
write(80+id(j),*) i,j,x(j),y(j),q
end subroutine loop_body
end program chkloop_internal
>From gcc-bugs-return-581406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 23:01:46 2017
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Subject: [Bug target/82926] x86_64 inline assembly with push/pop produces buggy code
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If it is __x86_64__ only, then the push/pop is totally useless, %rbx is like
any other reg (for __i386__ too if not pic or when using a recent gcc).
So just asm ("cpuid" : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d) : "0" (op));
Or you could e.g. xchg %%ebx, %%esi and back for __i386__ instead of the
push/pop, or, if for whatever weird reason you don't want to clobber %rbx for
__x86_64__, you could e.g. subtract the red zone size from %rsp first, then
push and after poping add back.
>From gcc-bugs-return-581407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 09 23:13:30 2017
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--- Comment #3 from EoD <EoD at xmw dot de> ---
(In reply to Uroš Bizjak from comment #1)
> The testcase violates redzone.
>
> Either add rsp to the list of clobbered registers, or compile with
> -fno-red-zone.
>
> OTOH, you should just include <cpuid.h> and use __cpuid.
(In reply to Jakub Jelinek from comment #2)
> If it is __x86_64__ only, then the push/pop is totally useless, %rbx is like
> any other reg (for __i386__ too if not pic or when using a recent gcc).
> So just asm ("cpuid" : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d) : "0"
> (op));
> Or you could e.g. xchg %%ebx, %%esi and back for __i386__ instead of the
> push/pop, or, if for whatever weird reason you don't want to clobber %rbx
> for __x86_64__, you could e.g. subtract the red zone size from %rsp first,
> then push and after poping add back.
Thanks for your fast replies! I have forwarded the issues to the pulseaudio
team: https://bugs.freedesktop.org/show_bug.cgi?id=103656
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Subject: [Bug c/82914] 'struct __attribute__ ((aligned (N))) s' ignores 'aligned' attribute
Date: Thu, 09 Nov 2017 23:17:00 -0000
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--- Comment #4 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Richard Biener from comment #2)
> You are not using aligned on a 'struct or struct member' but on the variable
> in all but (b).
If that's the intent, then GCC is mishandling the first example I gave in
comment #0:
struct s { char mem; };
__attribute__ ((aligned (8))) struct s a;
struct __attribute__ ((aligned (8))) s b;
struct s __attribute__ ((aligned (8))) c;
struct s d __attribute__ ((aligned (8)));
Here, GCC says the alignment of 'b' is 1, not 8. What happened to the
attribute?
Later discussion in https://bugs.gnu.org/29183 has revealed that this first
example is also relevant to Emacs, and that Emacs crashes due to problems in
this area as well.
In summary there seems to be no straightforward way in GNU C to get what Emacs
wants, which is to say, "I want V's address to be a multiple of max(8, (natural
alignment for V))." I think I'll look into fixing Emacs to use unions instead.
Could you please fix the GCC documentation to clarify what's going on here? I
don't understand it myself, so I'm afraid any doc patch that I propose wouldc
be wrong.
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Subject: [Bug lto/81351] [8 regression] Many LTO testcases FAIL
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |ebotcazou at gcc dot gnu.org
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
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Subject: [Bug rtl-optimization/82913] [8 Regression] ICE: Segmentation fault in try_merge_compare
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 9 23:58:51 2017
New Revision: 254614
URL: https://gcc.gnu.org/viewcvs?rev=254614&root=gcc&view=rev
Log:
PR rtl-optimization/82913
* compare-elim.c (try_merge_compare): Punt if def_insn is not
single set.
* gcc.c-torture/compile/pr82913.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr82913.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/compare-elim.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/82913] [8 Regression] ICE: Segmentation fault in try_merge_compare
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/82927] New: [8 Regression] ICE in verify_flow_info building SH glibc
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Bug ID: 82927
Summary: [8 Regression] ICE in verify_flow_info building SH
glibc
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jsm28 at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Target: sh4-linux-gnu
Created attachment 42570
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42570&action=edit
preprocessed source
Given the fix for bug 82863 (checked in although that bug isn't yet closed),
GCC completes the libgcc build but then ICEs building glibc for sh4-linux-gnu.
My expectation is that this ICE was also introduced by r254379, though I
haven't tested to verify this. Compile the attached test (not reduced) with
-O2.
gconv_builtin.c: In function '__gconv_get_builtin_trans':
gconv_builtin.c:86:1: error: verify_flow_info: Wrong probability of edge 10->12
gconv_builtin.c:86:1: error: verify_flow_info: Wrong probability of edge 10->11
gconv_builtin.c:86:1: error: verify_flow_info: Wrong probability of edge 6->9
gconv_builtin.c:86:1: error: verify_flow_info: Wrong probability of edge 6->7
during RTL pass: expand
gconv_builtin.c:86:1: internal compiler error: verify_flow_info failed
0x71ba23 verify_flow_info()
/scratch/jmyers/glibc/many8/src/gcc/gcc/cfghooks.c:265
0x10a9ef2 checking_verify_flow_info
/scratch/jmyers/glibc/many8/src/gcc/gcc/cfghooks.h:198
0x10a9ef2 try_optimize_cfg
/scratch/jmyers/glibc/many8/src/gcc/gcc/cfgcleanup.c:3015
0x10aa1fd cleanup_cfg(int)
/scratch/jmyers/glibc/many8/src/gcc/gcc/cfgcleanup.c:3179
0x718815 execute
/scratch/jmyers/glibc/many8/src/gcc/gcc/cfgexpand.c:6511
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug c++/70528] [5 Regression] bogus error: constructor required before non-static data member
Date: Fri, 10 Nov 2017 01:59:00 -0000
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EoD <EoD at xmw dot de> changed:
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----------------------------------------------------------------------------
CC| |EoD at xmw dot de
--- Comment #20 from EoD <EoD at xmw dot de> ---
(In reply to Jakub Jelinek from comment #19)
> GCC 5 branch has been closed, should be fixed in GCC 6 and later.
Is this part of GCC 5.5.0?
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Subject: [Bug middle-end/82928] New: glibc test-tgmath3 ICE on powerpc64le
Date: Fri, 10 Nov 2017 03:23:00 -0000
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Bug ID: 82928
Summary: glibc test-tgmath3 ICE on powerpc64le
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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Created attachment 42571
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42571&action=edit
somewhat reduced testcase
Seen with current glibc "make check", gcc 20171109
during RTL pass: expand
/home/amodra/build/glibc/math/test-tgmath3.c: In function 'test_log10_17':
/home/amodra/build/glibc/math/test-tgmath3.c:150331:23: internal compiler
error: in as_a, at machmode.h:345
vol_var___CFLOAT128 = log10 (vol_var___CFLOAT128);
0x1050cc0f scalar_mode as_a<scalar_mode>(machine_mode)
/home/amodra/src/gcc/gcc/machmode.h:345
0x1050cc0f convert_mode_scalar
/home/amodra/src/gcc/gcc/expr.c:280
0x1050cc0f convert_move(rtx_def*, rtx_def*, int)
/home/amodra/src/gcc/gcc/expr.c:271
0x105156c7 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
/home/amodra/src/gcc/gcc/expr.c:5631
0x105172c3 expand_assignment(tree_node*, tree_node*, bool)
/home/amodra/src/gcc/gcc/expr.c:5322
0x103879af expand_gimple_stmt_1
/home/amodra/src/gcc/gcc/cfgexpand.c:3675
0x103879af expand_gimple_stmt
/home/amodra/src/gcc/gcc/cfgexpand.c:3773
0x1038ba83 expand_gimple_basic_block
/home/amodra/src/gcc/gcc/cfgexpand.c:5774
0x10391b67 execute
/home/amodra/src/gcc/gcc/cfgexpand.c:6375
gcc -c -O1 -mcpu=power8 to reproduce with attached testcase
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82929] New: [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400
Date: Fri, 10 Nov 2017 05:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82929
Bug ID: 82929
Summary: [8 regression] r254579 causes ICE: tree check:
expected ssa_name, have array_ref in has_single_use,
at ssa-iterators.h:400
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
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Since r254579:
trippels@gcc2-power8 llvm_build % cat SubtargetFeature.ii
template <int _Nw> struct A {
long _M_w[_Nw];
void m_fn1(A p1) {
for (int a = 0;; a++)
_M_w[a] &= p1._M_w[a];
}
void m_fn2() {
for (int b = 0; b < _Nw; b++)
_M_w[b] = ~_M_w[b];
}
};
template <int _Nb> struct C : A<_Nb / (8 * 8)> {
void operator&=(C p1) { this->m_fn1(p1); }
C m_fn3() {
this->m_fn2();
return *this;
}
C operator~() { return C(*this).m_fn3(); }
};
struct B {
C<192> Value;
};
void fn1(C<192> &p1) {
B c;
p1 &= ~c.Value;
}
trippels@gcc2-power8 llvm_build % g++ -O2 -c SubtargetFeature.ii
during GIMPLE pass: store-merging
SubtargetFeature.ii: In function ‘void fn1(C<192>&)’:
SubtargetFeature.ii:23:6: internal compiler error: tree check: expected
ssa_name, have mem_ref in has_single_use, at ssa-iterators.h:400
void fn1(C<192> &p1) {
^~~
0x1019870b tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9096
0x101ba5a3 tree_check(tree_node const*, char const*, int, char const*,
tree_code)
../../gcc/gcc/tree.h:3344
0x101ba5a3 has_single_use
../../gcc/gcc/ssa-iterators.h:400
0x1151ff1b has_single_use
../../gcc/gcc/gimple-ssa-store-merging.c:1445
0x1151ff1b count_multiple_uses
../../gcc/gcc/gimple-ssa-store-merging.c:1435
0x1152011f split_group
../../gcc/gcc/gimple-ssa-store-merging.c:1509
0x11520ac7 output_merged_store
../../gcc/gcc/gimple-ssa-store-merging.c:1719
0x11523707 output_merged_stores
../../gcc/gcc/gimple-ssa-store-merging.c:2055
0x11523707 terminate_and_process_chain
../../gcc/gcc/gimple-ssa-store-merging.c:2093
0x11523707 terminate_and_release_chain
../../gcc/gcc/gimple-ssa-store-merging.c:991
0x11523f47 terminate_and_process_all_chains
../../gcc/gcc/gimple-ssa-store-merging.c:928
0x1152451f execute
../../gcc/gcc/gimple-ssa-store-merging.c:2504
>From gcc-bugs-return-581416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 06:31:44 2017
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Subject: [Bug c++/70528] [5 Regression] bogus error: constructor required before non-static data member
Date: Fri, 10 Nov 2017 06:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70528
--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
No.
>From gcc-bugs-return-581417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 07:23:53 2017
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From: "pexu@gcc-bugzilla.mail.kapsi.fi" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82930] New: [C++17/AArch64] ICE: in is_normal_capture_proxy, at cp/lambda.c:288 with structured binding in a lambda function with auto typed arguments
Date: Fri, 10 Nov 2017 07:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82930
Bug ID: 82930
Summary: [C++17/AArch64] ICE: in is_normal_capture_proxy, at
cp/lambda.c:288 with structured binding in a lambda
function with auto typed arguments
Product: gcc
Version: 8.0
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Created attachment 42572
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42572&action=edit
The test case that triggers `internal compiler error: in
is_normal_capture_proxy, at cp/lambda.c:288'
Hi.
This could be related to others ICEs with structured bindings, but the thrown
internal compiler error is at a different location and couldn't find anyone
else having hit this particular spot.
Attached a test case. Running it with (pretty much) the latest trunk
(2017-11-09) currently gives:
$ aarch64-none-elf-g++.exe -Wall -Wextra -c --std=gnu++17
ice_is_normal_capture_proxy.cpp
ice_is_normal_capture_proxy.cpp: In lambda function:
ice_is_normal_capture_proxy.cpp:17:8: internal compiler error: in
is_normal_capture_proxy, at cp/lambda.c:288
eat(left);
Any lambda (capturing or not) with an auto typed parameter will fail, if any of
the structured binding result is used. It doesn't matter if the auto typed
argument is actually used or, or whether or not the the code at lambda call
site would actually compile, e.g. trying to call the lambda without any
arguments.
The test case compiles just fine, if the auto type is replaced with some other
type, say an int (-DNO_AUTO_ARG).
>From gcc-bugs-return-581418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 07:31:58 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82929] [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400
Date: Fri, 10 Nov 2017 07:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-10
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42573
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42573&action=edit
gcc8-pr82929.patch
Untested fix.
>From gcc-bugs-return-581419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 07:47:14 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Fri, 10 Nov 2017 07:47:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> Created attachment 42567 [details]
> gcc8-pr82916.patch
>
> Untested fix.
As you figured ref_maybe_used_by_stmt and stmt_clobbers_ref_p are supposed
to be read-write dependence checks.
Note you may not use stmt_clobbers_ref_p to ask whether to re-order
... = read;
write = ...;
you'd have to use refs_anti_dependent_p.
The fix looks correct but as noted above you might want to audit the checks
for the possibility of the case anti-dependence checks lurking (which wouldn't
be handled correctly either).
>From gcc-bugs-return-581420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:00:50 2017
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From: "wilhelm.meier@hs-kl.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82931] New: Missing Optimization for Bit-Transfer (AVR Target)
Date: Fri, 10 Nov 2017 08:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82931
Bug ID: 82931
Summary: Missing Optimization for Bit-Transfer (AVR Target)
Product: gcc
Version: 8.0
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Created attachment 42574
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42574&action=edit
Minimum complete verifying example
The attached example produces optimal code for the AVR-target: it uses the
bst/bld assembler instructions. But this is only true for bit 0 (least
significant) in an uint8_t type. If the same instruction sequence is used to
transfer bit 1...7 less optimal code is generated.
This is unlogical to some respect since the backend recognizes the special case
for bit 0, so it should be possible to use the very same optimization for other
bits.
The same holds true if one used another datatype such as uint16_t and greater.
No optimization takes place.
>From gcc-bugs-return-581421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:02:58 2017
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Subject: [Bug target/82931] Missing Optimization for Bit-Transfer (AVR Target)
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--- Comment #1 from wilhelm.meier@hs-kl.de ---
Should compile with -Os to reproduce the result.
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Ralf <allizgubccg at reallysoft dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |allizgubccg at reallysoft dot de
--- Comment #2 from Ralf <allizgubccg at reallysoft dot de> ---
I encounter very similar internal compiler errors for several source files and
with several gcc version (tested: 5.5, 6.3 and 7.1).
The affected functions contain huge amounts of generated test code.
Starting with gcc 7.1 the compilation times for some of these modules raised up
to several minutes, so I tried to disable optimization for the test code to
reduce compile times.
For compilations done with -O1 up to-O3 and -Wdisabled-optimization I get the
following warnings
--------------------
adquery.cxx: In function 'void TEST_DB_search()':
adquery.cxx:936: warning: const/copy propagation disabled: 8163 basic blocks
and 57756 registers [-Wdisabled-optimization]
adquery.cxx:936: warning: PRE disabled: 8163 basic blocks and 57756 registers
[-Wdisabled-optimization]
adquery.cxx:936: warning: const/copy propagation disabled: 8163 basic blocks
and 57756 registers [-Wdisabled-optimization]
adquery.cxx:936: warning: const/copy propagation disabled: 8163 basic blocks
and 57756 registers [-Wdisabled-optimization]
--------------------
To disable the unneeded, time-consuming optimization I've attributed the
functions where these warnings occurred with
__attribute__((optimize("no-var-tracking")))
which caused gcc to terminate with:
--------------------
adquery.cxx:936:1: internal compiler error: in get_insn_template, at
final.c:2124
0x8583f6 get_insn_template(int, rtx_def*)
../../gcc-5.5.0/gcc/final.c:2124
0x85a9ba final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
../../gcc-5.5.0/gcc/final.c:2986
0x85b2c9 final(rtx_insn*, _IO_FILE*, int)
../../gcc-5.5.0/gcc/final.c:2089
0x85b71b rest_of_handle_final
../../gcc-5.5.0/gcc/final.c:4488
0x85b71b execute
../../gcc-5.5.0/gcc/final.c:4563
Please submit a full bug report, ...
--------------------
Adding a second attribute
__attribute__((optimize("no-var-tracking-assignments")))
made the problem disappear reproducible.
>From gcc-bugs-return-581423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:19:19 2017
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Subject: [Bug fortran/82895] An internal routine used in a parallel section (OpenMP) does not get the values of thread-private variables
Date: Fri, 10 Nov 2017 08:19:00 -0000
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--- Comment #6 from Arjen Markus <arjen.markus at deltares dot nl> ---
Thanks for the explanation and the adjusted example. This is clear enough.
>From gcc-bugs-return-581424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:23:45 2017
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Subject: [Bug target/82931] Missing Optimization for Bit-Transfer (AVR Target)
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wilhelm.meier@hs-kl.de changed:
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----------------------------------------------------------------------------
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is obsolete| |
--- Comment #2 from wilhelm.meier@hs-kl.de ---
Created attachment 42575
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42575&action=edit
Minimum complete verifying example
>From gcc-bugs-return-581425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:31:46 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82932] New: [8 Regression] [OOP] ICE in update_compcall_arglist, at fortran/resolve.c:5837
Date: Fri, 10 Nov 2017 08:31:00 -0000
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Bug ID: 82932
Summary: [8 Regression] [OOP] ICE in update_compcall_arglist,
at fortran/resolve.c:5837
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Consider this (invalid) test case:
module m
implicit none
type, abstract :: AT
contains
procedure(init_ifc), deferred :: sinit
procedure(missing_ifc), deferred :: missing
generic :: init => sinit
end type
abstract interface
subroutine init_ifc(data)
import AT
class(AT) :: data
end subroutine
subroutine missing_ifc(data)
import AT
class(AT) :: data
end subroutine
end interface
end module
program p
use m
implicit none
type, extends(AT) :: ET
contains
procedure :: sinit
end type
type(ET) :: c
call c%init()
end
With current trunk I get:
type, extends(AT) :: ET
1
Error: Derived-type ‘et’ declared at (1) must be ABSTRACT because ‘missing’ is
DEFERRED and not overridden
f951: internal compiler error: in update_compcall_arglist, at
fortran/resolve.c:5837
0x7016e9 update_compcall_arglist
/home/janus/gcc/trunk/gcc/fortran/resolve.c:5837
0x7016e9 resolve_typebound_static
/home/janus/gcc/trunk/gcc/fortran/resolve.c:5978
0x707ec9 resolve_typebound_call
/home/janus/gcc/trunk/gcc/fortran/resolve.c:6190
0x7061ea resolve_typebound_subroutine
/home/janus/gcc/trunk/gcc/fortran/resolve.c:6492
0x7061ea gfc_resolve_code(gfc_code*, gfc_namespace*)
/home/janus/gcc/trunk/gcc/fortran/resolve.c:11265
0x706e5a resolve_codes
/home/janus/gcc/trunk/gcc/fortran/resolve.c:16407
0x706f66 gfc_resolve(gfc_namespace*)
/home/janus/gcc/trunk/gcc/fortran/resolve.c:16442
0x6f01aa resolve_all_program_units
/home/janus/gcc/trunk/gcc/fortran/parse.c:6030
0x6f01aa gfc_parse_file()
/home/janus/gcc/trunk/gcc/fortran/parse.c:6280
0x736baf gfc_be_parse_file
/home/janus/gcc/trunk/gcc/fortran/f95-lang.c:204
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.
gfortran 5,6,7 give just the error message, but no ICE.
>From gcc-bugs-return-581426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 08:58:36 2017
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Subject: [Bug fortran/82932] [8 Regression] [OOP] ICE in update_compcall_arglist, at fortran/resolve.c:5837
Date: Fri, 10 Nov 2017 08:58:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-10
Assignee|unassigned at gcc dot gnu.org |janus at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from janus at gcc dot gnu.org ---
This draft patch fixes the ICE:
Index: gcc/fortran/resolve.c
===================================================================
--- gcc/fortran/resolve.c (revision 254521)
+++ gcc/fortran/resolve.c (working copy)
@@ -5834,7 +5834,9 @@ update_compcall_arglist (gfc_expr* e)
return true;
}
- gcc_assert (tbp->pass_arg_num > 0);
+ if (tbp->pass_arg_num <= 0)
+ return false;
+
e->value.compcall.actual = update_arglist_pass (e->value.compcall.actual,
po,
tbp->pass_arg_num,
tbp->pass_arg);
>From gcc-bugs-return-581427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 09:01:06 2017
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Subject: [Bug c/82933] New: valgrind error in set_cur_line_info_table with -g
Date: Fri, 10 Nov 2017 09:00:00 -0000
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Bug ID: 82933
Summary: valgrind error in set_cur_line_info_table with -g
Product: gcc
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For a valgrind version of recent gcc trunk, run over the testsuite:
$ /home/dcb/gcc/results.254440.valgrind/bin/gcc -c -g
./gcc.dg/rtl/x86_64/into-cfglayout.c
==7666== Invalid write of size 1
==7666== at 0x767B0E: set_cur_line_info_table(section*) (dwarf2out.c:26501)
==7666== by 0xDE7942: assemble_start_function(tree_node*, char const*)
(varasm.c:1821)
==7666== by 0x803407: rest_of_handle_final (final.c:4475)
==7666== by 0x803407: (anonymous namespace)::pass_final::execute(function*)
(final.c:4551)
The line of code in question is
table->end_label = cold_end_label;
svn blame says
171816 rth table->end_label = cold_end_label;
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
Date: Fri, 10 Nov 2017 09:21:00 -0000
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--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
I've now submitted the patch upstream: https://reviews.llvm.org/D39888.
Let's see how this goes.
Rainer
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Subject: [Bug middle-end/82928] glibc test-tgmath3 ICE on powerpc64le
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
Attachment #42571|0 |1
is obsolete| |
--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
Created attachment 42576
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42576&action=edit
reduced testcase
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Subject: [Bug fortran/82934] New: Segfault on assumed character length in allocate
Date: Fri, 10 Nov 2017 09:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82934
Bug ID: 82934
Summary: Segfault on assumed character length in allocate
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Reported by FortranFan on clf:
https://groups.google.com/forum/#!topic/comp.lang.fortran/Lg8tBwlkS6A
character(len=42), allocatable :: foo
call alloc( foo )
print *, "len(foo) = ", len(foo), "; expected = 42"
contains
subroutine alloc( bar )
character(len=*), allocatable :: bar
allocate( character(len=*) :: bar )
end subroutine
end
[pault@pc30 pr78990]$ gfortran -static-libgfortran f*.f90 -O2
fortranfan1.f90:15:0:
allocate( character(len=*) :: bar , barbar)
1
internal compiler error: in gfc_trans_allocate, at fortran/trans-stmt.c:5316
GNU Fortran (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4)
Goes through all the way to trunk.
Paul
>From gcc-bugs-return-581431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:02:11 2017
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Subject: [Bug target/82935] New: Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
Date: Fri, 10 Nov 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82935
Bug ID: 82935
Summary: Unnecessary "sub rsp, 8", "call" and "add rsp, 8"
instructions
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Following code
typedef struct array_ {
int data[10202023];
} array;
void assign(array* a1, array* a2) {
*a1 = *a2;
}
Generates assembly:
assign:
sub rsp, 8 <==== Not required
mov edx, 40808092
call memcpy <==== jmp ?
add rsp, 8 <==== Not required
ret
Clang generates much more compact assembly:
assign: # @assign
mov edx, 40808092
jmp memcpy # TAILCALL
>From gcc-bugs-return-581432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:05:08 2017
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Subject: [Bug rtl-optimization/82597] [8 Regression] ICE at -O2 and -O3 x86_64-linux-gnu in the 32-bit mode: in extract_constrain_insn, at recog.c:2207
Date: Fri, 10 Nov 2017 10:05:00 -0000
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--- Comment #8 from Arseny Solokha <asolokha at gmx dot com> ---
Is it safe to close this PR now?
>From gcc-bugs-return-581433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:11:12 2017
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Subject: [Bug tree-optimization/82902] [7 Regression] ICE verify_ssa failed during GIMPLE pass: phiprop
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--- Comment #5 from John Buddery <jvb at cyberscience dot com> ---
Thanks for the quick fix - this resolves the ICE in 8.0 for me, and applying to
7.2 fixes the invalid code generation I was seeing there.
>From gcc-bugs-return-581434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:14:29 2017
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Why do you think these instructions are not needed?
>From gcc-bugs-return-581435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:17:56 2017
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
Date: Fri, 10 Nov 2017 10:17:00 -0000
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--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
> Why do you think these instructions are not needed?
Because Clang does not generate them.
>From gcc-bugs-return-581436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:29:19 2017
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
Date: Fri, 10 Nov 2017 10:29:00 -0000
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Antony Polukhin from comment #2)
> Because Clang does not generate them.
So, the Earth is flat because someone says, too?
>From gcc-bugs-return-581437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:32:12 2017
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
Date: Fri, 10 Nov 2017 10:32:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 10 10:31:34 2017
New Revision: 254623
URL: https://gcc.gnu.org/viewcvs?rev=254623&root=gcc&view=rev
Log:
PR bootstrap/82916
* gimple-ssa-store-merging.c
(pass_store_merging::terminate_all_aliasing_chains): For
gimple_store_p stmts also call refs_output_dependent_p.
* gcc.dg/store_merging_2.c: Only expect 2 successful mergings instead
of 3.
* gcc.dg/pr82916.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr82916.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/store_merging_2.c
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Subject: [Bug bootstrap/82916] [8 regression] gcc miscompiled during stagefeedback (PGO bootstrap)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:49:37 2017
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
Date: Fri, 10 Nov 2017 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82935
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
We keep
*a1_2(D) = *a2_3(D);
and only at expansion time turn it into a call to memcpy, so the gimple pass
that detects tail calls doesn't have a chance to notice this case.
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From: "lizhenhuan1019 at qq dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82936] New: segment fault crash for non-type template parameter
Date: Fri, 10 Nov 2017 10:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82936
Bug ID: 82936
Summary: segment fault crash for non-type template parameter
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 42577
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42577&action=edit
The test case.
Tried to compile the following code but gcc 7.2.0 crashed with segment fault.
Neither diagnostic message nor output file were generated.
Tested on Arch Linux x64 and windows 10 x64(using MSYS2 in Mingw-w64 mode) and
both crashed. Also tested on online compiler wandbox.org and the same occurred.
The code(small enough):
#include <utility>
int fun(int i)
{
return 0;
}
template<typename F>
struct outer;
template<typename R, typename ...Args>
struct outer<R(Args...)>
{
template<R(&f)(Args...)>
struct callable
{
template <typename...T>
R operator()(T&&...t)
{
return f(std::forward<T>(t)...);
}
};
};
int main()
{
outer<int(int)>::callable<fun> f;//this line triggered the bug.
return 0;
}
//the code ends.
On Arch Linux:
The command used to compile the test case was g++ main.cpp
The error output of g++ main.cpp -v -save-temps :
**begin:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -E -quiet -v -D_GNU_SOURCE
main.cpp -mtune=generic -march=x86-64 -fpch-preprocess -o main.ii
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/x86_64-pc-linux-gnu
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/backward
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include
/usr/local/include
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -version -o
main.s
GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5931a2fe3d5a5365a85e56248f3f55d7
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
** end:
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Subject: [Bug rtl-optimization/41455] memcpy not tail called if it's a struct assignment
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |antoshkka at gmail dot com
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 82935 has been marked as a duplicate of this bug. ***
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 41455.
*** This bug has been marked as a duplicate of bug 41455 ***
>From gcc-bugs-return-581443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 10:53:58 2017
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Subject: [Bug middle-end/41455] memcpy not tail called if it's a struct assignment
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I suspect what we can do is "lower" assignments to memcpy in a pass right
before tail call to optimize this case.
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Subject: [Bug c++/82936] segment fault crash for non-type template parameter
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--- Comment #1 from lizhenhuan1019 <lizhenhuan1019 at qq dot com> ---
Created attachment 42578
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42578&action=edit
The preprocessed file main.ii on Arch Linux
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Subject: [Bug target/82935] Unnecessary "sub rsp, 8", "call" and "add rsp, 8" instructions
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, clang uses a tail call, and we don't. And the reason why we don't is
that the call is introduced only during expansion and doesn't therefore have
the
GF_CALL_TAILCALL flag set (CALL_EXPR_TAILCALL on the CALL_EXPR).
The options I see (Richard, any preferences?):
1) turn aggregate assignments during the tailcall pass if at tailcall positions
into calls and set the flag
2) introduce a flag like GF_CALL_TAILCALL on structure assignment statements or
aggregate clearing, compute it during tailcall pass and check that flag during
aggregate copy/clear expansion
3) perform the analysis the tailcall pass does during expansion of aggregate
assignment or aggregate clearing
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Subject: [Bug c++/82936] segment fault crash for non-type template parameter
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--- Comment #2 from lizhenhuan1019 <lizhenhuan1019 at qq dot com> ---
Simplified the test case more:
int fun(int i)
{
return 0;
}
template <typename F>
struct outer;
template <typename R, typename ...Args>
struct outer<R(Args...)>
{
template <R(& f)(Args...)>
struct callable
{
};
};
outer<int(int)>::callable<fun> f;//this line triggered the bug.
>From gcc-bugs-return-581447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:03:42 2017
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Subject: [Bug c++/82936] segment fault crash for non-type template parameter
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lizhenhuan1019 <lizhenhuan1019 at qq dot com> changed:
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----------------------------------------------------------------------------
Attachment #42577|0 |1
is obsolete| |
--- Comment #3 from lizhenhuan1019 <lizhenhuan1019 at qq dot com> ---
Created attachment 42579
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42579&action=edit
Simplified test case main.cpp
>From gcc-bugs-return-581448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:10:48 2017
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Subject: [Bug c++/82936] segment fault crash for non-type template parameter
Date: Fri, 10 Nov 2017 11:10:00 -0000
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--- Comment #4 from lizhenhuan1019 <lizhenhuan1019 at qq dot com> ---
On Windows 10, MSYS2 in Mingw-w64 mode:
The error output of g++ main.cpp -v -save-temps:
*******The output begins
Using built-in specs.
COLLECT_GCC=D:\Program_Files\mysy64\mingw64\bin\g++.exe
COLLECT_LTO_WRAPPER=D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-7.2.0/configure --prefix=/mingw64
--with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
--libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64
--with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64
--with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64
--with-pkgversion='Rev1, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as
--with-gnu-ld
Thread model: posix
gcc version 7.2.0 (Rev1, Built by MSYS2 project)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/cc1plus.exe
-E -quiet -v -iprefix
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/
-D_REENTRANT main.cpp -mtune=generic -march=x86-64 -fpch-preprocess -o main.ii
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0"
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0/x86_64-w64-mingw32"
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0/backward"
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/include"
ignoring nonexistent directory "C:/building/msys64/mingw64/include"
ignoring nonexistent directory "/mingw64/include"
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/include-fixed"
ignoring duplicate directory
"D:/Program_Files/mysy64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory
"C:/building/msys64/mingw64/x86_64-w64-mingw32/include"
#include "..." search starts here:
#include <...> search starts here:
D:\library\global\include
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0/x86_64-w64-mingw32
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include/c++/7.2.0/backward
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/include
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../include
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/include-fixed
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/../../../../x86_64-w64-mingw32/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
D:/Program_Files/mysy64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/cc1plus.exe
-fpreprocessed main.ii -quiet -dumpbase main.cpp -mtune=generic -march=x86-64
-auxbase main -version -o main.s
************* The output ends.
The simplified test case is simple enough so that no preprocess source is
needed, so I don't upload the preprocessed source on Mingw-w64.
>From gcc-bugs-return-581449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:17:31 2017
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Subject: [Bug debug/82933] valgrind error in set_cur_line_info_table with -g
Date: Fri, 10 Nov 2017 11:17:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
A non-valgrind recent version of gcc does this:
$ ~/gcc/results.254608/bin/gcc -g -c gcc.dg/rtl/x86_64/into-cfglayout.c
during RTL pass: final
gcc.dg/rtl/x86_64/into-cfglayout.c: In function ‘test_1’:
gcc.dg/rtl/x86_64/into-cfglayout.c:108:1: internal compiler error: Segmentation
fault
}
^
0xd2cd0f crash_signal
../../trunk/gcc/toplev.c:325
0x914d37 set_cur_line_info_table
../../trunk/gcc/dwarf2out.c:26530
0x914d37 dwarf2out_begin_function
../../trunk/gcc/dwarf2out.c:26563
0xfe123f assemble_start_function(tree_node*, char const*)
../../trunk/gcc/varasm.c:1821
>From gcc-bugs-return-581450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:37:02 2017
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Subject: [Bug target/82927] [8 Regression] ICE in verify_flow_info building SH glibc
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I'll take a look, thank you for report.
>From gcc-bugs-return-581451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:42:24 2017
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Subject: [Bug middle-end/82918] No aliasing is possible on non equal pointers
Date: Fri, 10 Nov 2017 11:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-10
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Currently points-to analysis is not flow-sensitive and thus we have no way to
represent this. It's also a challenge to keep such information correct, if
attached to the memory accesses for example via MR_DEPENDENCE_{CLIQUE,BASE}
information, because it either restricts code motion across the predicate
or invalidates the info when moving across it.
So - confirmed, but "not so easy". For this and the related PRs it's probably
best to have on-demand of extra information.
>From gcc-bugs-return-581452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:44:20 2017
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Subject: [Bug other/82925] [8 regression] gcc.dg/tree-ssa/vrp101.c fails starting with r254379
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I see counts weirdly printed _before_ <bb N> now. Please fix.
>From gcc-bugs-return-581455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:45:56 2017
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Subject: [Bug tree-optimization/82929] [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400
Date: Fri, 10 Nov 2017 11:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/82928] [8 Regression] glibc test-tgmath3 ICE on powerpc64le
Date: Fri, 10 Nov 2017 11:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|glibc test-tgmath3 ICE on |[8 Regression] glibc
|powerpc64le |test-tgmath3 ICE on
| |powerpc64le
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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/82927] [8 Regression] ICE in verify_flow_info building SH glibc
Date: Fri, 10 Nov 2017 11:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/82933] [8 Regression] valgrind error in set_cur_line_info_table with -g
Date: Fri, 10 Nov 2017 11:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|valgrind error in |[8 Regression] valgrind
|set_cur_line_info_table |error in
|with -g |set_cur_line_info_table
| |with -g
>From gcc-bugs-return-581457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 11:50:15 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/41455] memcpy not tail called if it's a struct assignment
Date: Fri, 10 Nov 2017 11:50:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
We could do that I suppose. Of course memcpy will expand to alias-set zero
block copies while aggregate assignment can use better info.
So in the end this means doing full block-copy expansion on GIMPLE rather than
on RTL. Which sounds messy / impossible given stuff like rep; movb;
Another option is to not use __builtin_memcpy for aggregate assignments but
some internal function call that we can hand extra parameters (for aliasing).
>From gcc-bugs-return-581458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 12:08:59 2017
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From: "only_for_nouse at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82937] New: [F03] associate non-standard bounds are lost for associating entity
Date: Fri, 10 Nov 2017 12:08:00 -0000
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Bug ID: 82937
Summary: [F03] associate non-standard bounds are lost for
associating entity
Product: gcc
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Created attachment 42580
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42580&action=edit
Fortran 2003 program with associate construct
The attached file compiles and links fine with gfortran 7.2 compilers.
(gfortran -g -fbounds-check -O0 fortran_associate.F90)
The output of the code is
arr bounds are ( 1, 5)( 1, 8)(-3, 3)( 1,10)
myarr bounds are ( 1, 7)( 1,10)
At line 18 of file fortran_associate.F90
Fortran runtime error: Index '-3' of dimension 1 of array 'myarr' below lower
bound of 1
The code uses the associate construct to associate a subarray with an
associate name. The original array has non-standard array bounds -3:3,
but these array bounds are not retained for the associate name, although
the standard says:
Within an ASSOCIATE or SELECT TYPE construct, each associating
entity has the same rank and corank as its associated selector.
The lower bound of each dimension is the result of the intrinsic
function LBOUND applied to the corresponding dimension of
selector. The upper bound of each dimension is one less
than the sum of the lower bound and the extent.
To my understanding, the array bounds of the selector should be retained
also inside the associate construct for the associating entity.
>From gcc-bugs-return-581459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 12:16:17 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
Date: Fri, 10 Nov 2017 12:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |4.9.3
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-11-10
Ever confirmed|0 |1
Summary|Segfault on assumed |[6/7/8 Regression] Segfault
|character length in |on assumed character length
|allocate |in allocate
Known to fail| |5.5.0, 6.4.0, 7.2.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test gives the expected result with gfortran 4.8 and 4.9. The change in
behavior occurred between revisions r221412 + 3 patches (2015-03-13, works) and
r2214164 + 3 patches (2015-03-16, ICE).
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Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
Date: Fri, 10 Nov 2017 12:25:00 -0000
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Nov 10 12:24:24 2017
New Revision: 254624
URL: https://gcc.gnu.org/viewcvs?rev=254624&root=gcc&view=rev
Log:
2017-11-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82934
* trans-stmt.c (gfc_trans_allocate): Remove the gcc_assert on
null string length for assumed length typespec and set
expr3_esize to NULL_TREE;
2017-11-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82934
* gfortran.dg/allocate_assumed_charlen_1.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/allocate_assumed_charlen_1.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
So problem is that in pass_reorder_blocks::execute we reorder blocks so that
they are separated to cold and hot partitions. Then cleanup_cfg
(CLEANUP_EXPENSIVE); is called (bb-reorder.c:2593) and we end here:
2324 static vec<basic_block>
2325 find_partition_fixes (bool flag_only)
2326 {
2327 basic_block bb;
2328 vec<basic_block> bbs_in_cold_partition = vNULL;
2329 vec<basic_block> bbs_to_fix = vNULL;
2330 hash_set<basic_block> set;
2331
2332 /* Callers check this. */
2333 gcc_checking_assert (crtl->has_bb_partition);
2334
2335 find_bbs_reachable_by_hot_paths (&set);
2336
2337 FOR_EACH_BB_FN (bb, cfun)
2338 if (!set.contains (bb)
2339 && BB_PARTITION (bb) != BB_COLD_PARTITION)
2340 {
2341 if (flag_only)
2342 error ("non-cold basic block %d reachable only "
2343 "by paths crossing the cold partition", bb->index);
2344 else
2345 BB_SET_PARTITION (bb, BB_COLD_PARTITION);
2346 bbs_to_fix.safe_push (bb);
2347 bbs_in_cold_partition.safe_push (bb);
2348 }
2349
2350 return bbs_to_fix;
2351 }
and we mark one BB in hot partition as COLD. That causes the ICE.
What about something like this:
diff --git a/gcc/basic-block.h b/gcc/basic-block.h
index 5a5ddbfcb6d..5c393efd164 100644
--- a/gcc/basic-block.h
+++ b/gcc/basic-block.h
@@ -506,6 +506,7 @@ ei_cond (edge_iterator ei, edge *p)
insns. */
#define CLEANUP_CFGLAYOUT 32 /* Do cleanup in cfglayout mode. */
#define CLEANUP_CFG_CHANGED 64 /* The caller changed the CFG. */
+#define CLEANUP_NO_PARTITIONING 128 /* Do not try to fix
partitions. */
/* Return true if BB is in a transaction. */
diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index f7c1f4c971e..20e231739e3 100644
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -2590,7 +2590,7 @@ pass_reorder_blocks::execute (function *fun)
cfg_layout_initialize (CLEANUP_EXPENSIVE);
reorder_basic_blocks ();
- cleanup_cfg (CLEANUP_EXPENSIVE);
+ cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_NO_PARTITIONING);
FOR_EACH_BB_FN (bb, fun)
if (bb->next_bb != EXIT_BLOCK_PTR_FOR_FN (fun))
diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index 4734d3eae17..84756a542da 100644
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -3011,7 +3011,8 @@ try_optimize_cfg (int mode)
to detect and fix during edge forwarding, and in some cases
is only visible after newly unreachable blocks are deleted,
which will be done in fixup_partitions. */
- fixup_partitions ();
+ if ((mode & CLEANUP_NO_PARTITIONING) == 0)
+ fixup_partitions ();
checking_verify_flow_info ();
}
>From gcc-bugs-return-581462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 13:08:27 2017
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Thanks for working this out! The patch looks good to me. I wonder how we ended
up with such contradictory block at the first place? Was it introduced by
someone between the last expensive cfg cleanup and bb-reorder?
Honza
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #5)
> Thanks for working this out! The patch looks good to me. I wonder how we
> ended up with such contradictory block at the first place? Was it introduced
> by someone between the last expensive cfg cleanup and bb-reorder?
>
> Honza
Good question. The BB (16 and 17) are marked first as hot in bb-reorder, later
then identified by expensive cfg cleanup as cold. Feel free to investigate
function body.
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 42581
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42581&action=edit
bbro rtl dump
>From gcc-bugs-return-581466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 13:30:40 2017
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Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> The test gives the expected result with gfortran 4.8 and 4.9. The change in
> behavior occurred between revisions r221412 + 3 patches (2015-03-13, works)
> and r2214164 + 3 patches (2015-03-16, ICE).
Oddly, the fortran ChangeLog shows nothing between these dates that one could
implicate.
As you will see, the fix was trivial. I am just about to post it on the list
and will apply it to 6- and 7-branches over the weekend. Even if not a
regression, it does prevent an ICE in a particularly robust way :-)
Thanks for investigating.
Paul
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Subject: [Bug other/78063] libbacktrace fails to handle cross CU DW_AT_abstract_origin
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Now manifests itself for LTO bootstrapped compilers.
>From gcc-bugs-return-581468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 14:04:30 2017
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Subject: [Bug fortran/82938] New: Speed regression in internal read
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#!/bin/sh
seq --format="%.1f" 1 1000000 > read.txt
cat > read.f <<EOF
real f
character*12 buffer
open(10,file="read.txt")
1 read(10,'(a)',end=2) buffer
read(buffer,'(f12.0)') f
!!read(buffer,*) f
print*,f
goto 1
2 close(10)
end
EOF
cmd="gfc-bin"
$cmd --version
$cmd read.f -g
time ./read >/dev/null
On my box, this short program takes
2.4s for GNU Fortran (GCC) 8.0.0 20170828 (experimental) [trunk revision
251373]
4.4s for GNU Fortran (GCC) 8.0.0 20170829 (experimental) [trunk revision
251395]
This is most likely due to
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=251374
Of these 4.4s, about 4s are solely taken by the
line "read(buffer,'(f12.0)') f".
It is really "amazing" how slow internal read is,
compare e.g. with a C program ...
This issue clearly shows as a regression in a operational program of mine,
so no artificial, constructed issue.
>From gcc-bugs-return-581469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 14:15:43 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82939
Bug ID: 82939
Summary: genmatch fills up terminal with endless printing of
periods
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: egallager at gcc dot gnu.org
CC: bonzini at gnu dot org, dmalcolm at gcc dot gnu.org,
dodji at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin10
Target: x86_64-apple-darwin10
Build: x86_64-apple-darwin10
While trying to build gcc trunk today as of r254623, I ran into an issue where
genmatch looped infinitely printing periods until I had to kill it. Debugging
the issue in gdb, I traced it back to line 1391 in libcpp/linemap.c; svn blame
output for that portion of the code looks like this:
82199 bonzini /* Print an include trace, for e.g. the -H option of the
preprocessor. */
82199 bonzini
82199 bonzini static void
223365 dmalcolm trace_include (const struct line_maps *set, const
line_map_ordinary *map)
82199 bonzini {
82199 bonzini unsigned int i = set->depth;
82199 bonzini
82199 bonzini while (--i)
82199 bonzini putc ('.', stderr);
180081 dodji
180081 dodji fprintf (stderr, " %s\n", ORDINARY_MAP_FILE_NAME (map));
82199 bonzini }
Stepping into the loop, i turns out to be:
(gdb) p i
$2 = 1606398065
So I guess that's not actually infinite, but that's still an unreasonably large
value for i. Did it wrap around or something?
My configure args:
../configure --disable-werror --disable-werror-always
--enable-languages=c,c++,objc,obj-c++,lto --enable-stage1-checking=release,rtl
-C --with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-debug --without-isl --disable-host-shared --enable-maintainer-mode
--disable-default-pie --with-ld64 --without-pic --enable-target-optspace
--disable-nls --with-system-zlib --with-libiconv-prefix=/opt/local
--with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --enable-lto
--with-build-config=bootstrap-debug --with-as=/opt/local/bin/as
--with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --enable-objc-gc
--enable-libada --enable-libssp --disable-libsanitizer CC='/usr/bin/gcc-4.2
-arch i386 -arch x86_64' CXX='/usr/bin/g++-4.2 -arch x86_64'
AR_FOR_TARGET=/opt/local/bin/ar AS_FOR_TARGET=/opt/local/bin/as
LD_FOR_TARGET=/opt/local/bin/ld NM_FOR_TARGET=/opt/local/bin/nm
RANLIB_FOR_TARGET=/opt/local/bin/ranlib STRIP_FOR_TARGET=/opt/local/bin/strip
OTOOL=/opt/local/bin/otool OTOOL64=/opt/local/bin/otool
AUTOCONF=/opt/local/bin/autoconf264 AUTOHEADER=/opt/local/bin/autoheader264
AUTOM4TE=/opt/local/bin/autom4te264 AUTORECONF=/opt/local/bin/autoreconf264
AUTOSCAN=/opt/local/bin/autoscan264 AUTOUPDATE=/opt/local/bin/autoupdate264
IFNAMES=/opt/local/bin/ifnames264 ACLOCAL=/sw/bin/aclocal-1.11
PERL=/opt/local/bin/perl CFLAGS='-pipe -g -Os' CXXFLAGS='-pipe -g -Os
-fcheck-new' CPP='/usr/bin/gcc-4.2 -E' CXXCPP='/usr/bin/g++-4.2 -E'
M4=/opt/local/bin/gm4
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
Date: Fri, 10 Nov 2017 14:38:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Is that during stage 1 or in a later stage?
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Subject: [Bug tree-optimization/82929] [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400
Date: Fri, 10 Nov 2017 14:43:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 10 14:43:13 2017
New Revision: 254628
URL: https://gcc.gnu.org/viewcvs?rev=254628&root=gcc&view=rev
Log:
PR tree-optimization/82929
* gimple-ssa-store-merging.c (struct store_immediate_info): Add
ops_swapped_p non-static data member.
(store_immediate_info::store_immediate_info): Clear it.
(imm_store_chain_info::coalesce_immediate_stores): If swapping
ops set ops_swapped_p.
(count_multiple_uses): Handle ops_swapped_p.
* gcc.dg/pr82929.c: New test.
* g++.dg/opt/pr82929.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr82929.C
trunk/gcc/testsuite/gcc.dg/pr82929.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
Date: Fri, 10 Nov 2017 14:58:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> Is that during stage 1 or in a later stage?
stage 1.
Backtraces, for reference:
(gdb) bt
#0 trace_include [inlined] () at
/Users/ericgallager/gcc/libcpp/line-map.c:1390
#1 0x000000010003c105 in linemap_add (set=<value temporarily unavailable, due
to optimizations>, reason=<value temporarily unavailable, due to
optimizations>, sysp=<value temporarily unavailable, due to optimizations>,
to_file=0x100500f90 "../../gcc/match.pd", to_line=1) at
../../../libcpp/line-map.c:570
#2 0x000000010002c33c in _cpp_do_file_change (pfile=0x100800400, reason=<value
temporarily unavailable, due to optimizations>, to_file=<value temporarily
unavailable, due to optimizations>, file_line=<value temporarily unavailable,
due to optimizations>, sysp=<value temporarily unavailable, due to
optimizations>) at ../../../libcpp/directives.c:1125
#3 0x0000000100033af7 in _cpp_stack_file (pfile=0x100800400, file=0x100500e80,
import=false, loc=0) at ../../../libcpp/files.c:932
#4 0x000000010003556c in cpp_read_main_file (pfile=0x100800400,
fname=0x7fff5fbfb6e1 "../../gcc/match.pd") at ../../../libcpp/init.c:647
#5 0x0000000100011ead in main (argc=3, argv=0x7fff5fbfb208) at
../../gcc/genmatch.c:5002
(gdb) bt full
#0 trace_include [inlined] () at
/Users/ericgallager/gcc/libcpp/line-map.c:1390
map = (const line_map_ordinary *) #1 0x000000010003c105 in linemap_add
(set=<value temporarily unavailable, due to optimizations>, reason=<value
temporarily unavailable, due to optimizations>, sysp=<value temporarily
unavailable, due to optimizations>, to_file=0x100500f90 "../../gcc/match.pd",
to_line=1) at ../../../libcpp/line-map.c:570
map = (const line_map_ordinary *) #2 0x000000010002c33c in
_cpp_do_file_change (pfile=0x100800400, reason=<value temporarily unavailable,
due to optimizations>, to_file=<value temporarily unavailable, due to
optimizations>, file_line=<value temporarily unavailable, due to
optimizations>, sysp=<value temporarily unavailable, due to optimizations>) at
../../../libcpp/directives.c:1125
map = <value temporarily unavailable, due to optimizations>
ord_map = <value temporarily unavailable, due to optimizations>
__FUNCTION__ = "_cpp_do_file_change"
#3 0x0000000100033af7 in _cpp_stack_file (pfile=0x100800400, file=0x100500e80,
import=false, loc=0) at ../../../libcpp/files.c:932
buffer = <value temporarily unavailable, due to optimizations>
sysp = 0
#4 0x000000010003556c in cpp_read_main_file (pfile=0x100800400,
fname=0x7fff5fbfb6e1 "../../gcc/match.pd") at ../../../libcpp/init.c:647
No locals.
#5 0x0000000100011ead in main (argc=3, argv=0x7fff5fbfb208) at
../../gcc/genmatch.c:5002
r = (cpp_reader *) 0x100800400
gimple = true
input = 0x7fff5fbfb6e1 "../../gcc/match.pd"
cb = (cpp_callbacks *) 0x100800760
dir = (cpp_dir *) 0x100500e40
p = {
r = 0x0,
active_ifs = {
m_vec = 0x9
},
active_fors = {
m_vec = 0x7fff5fc005f8
},
oper_lists_set = 0x7,
oper_lists = {
m_vec = 0x7fff5fc3c028
},
capture_ids = 0x7fff5fbfb228,
last_id = 1606398432,
simplifiers = {
m_vec = 0x7fff5fc016de
},
user_predicates = {
m_vec = 0x7fff5fc00020
},
parsing_match_operand = false
}
dt = {
root = 0x7fff5fbfb208
}
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Subject: [Bug gcov-profile/82702] gcov intermediate format is creating multiple 'gcov' files, it was creating a single file up to GCC 6
Date: Fri, 10 Nov 2017 15:24:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Nov 10 15:23:24 2017
New Revision: 254629
URL: https://gcc.gnu.org/viewcvs?rev=254629&root=gcc&view=rev
Log:
GCOV: create one intermediate file per a gcno file (PR gcov-profile/82702).
2017-11-10 Martin Liska <mliska@suse.cz>
PR gcov-profile/82702
* gcov.c (main): Handle intermediate files in a different
way.
(get_gcov_intermediate_filename): New function.
(output_gcov_file): Remove support of intermediate files.
(generate_results): Allocate intermediate file.
(release_structures): Clean-up properly fn_end.
(output_intermediate_file): Start iterating with line 1.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gcov.c
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Subject: [Bug libfortran/78549] [8 Regression] Very slow formatted internal file output
Date: Fri, 10 Nov 2017 15:29:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manfred99 at gmx dot ch
--- Comment #22 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
*** Bug 82938 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/82938] Speed regression in internal read
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |tkoenig at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This issue is known.
*** This bug has been marked as a duplicate of bug 78549 ***
>From gcc-bugs-return-581476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 15:39:47 2017
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From: "christophe.leroy@c-s.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82940] New: Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc
Date: Fri, 10 Nov 2017 15:39:00 -0000
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Bug ID: 82940
Summary: Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: christophe.leroy@c-s.fr
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unsigned char g(unsigned char t[], unsigned char v)
{
return (t[v & 0x7f] & 0x7f) | (v & 0x80);
}
00000008 <g>:
8: 54 89 06 7e clrlwi r9,r4,25
c: 7c 63 48 ae lbzx r3,r3,r9
10: 54 84 00 30 rlwinm r4,r4,0,0,24
14: 54 63 06 7e clrlwi r3,r3,25
18: 7c 63 23 78 or r3,r3,r4
1c: 4e 80 00 20 blr
I would expect
00000008 <g>:
8: 54 89 06 7e clrlwi r9,r4,25
c: 7c 63 48 ae lbzx r3,r3,r9
10: 54 84 00 30 rlwimi r3,r4,0,24,24
14: 4e 80 00 20 blr
>From gcc-bugs-return-581477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 15:41:43 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82932] [8 Regression] [OOP] ICE in update_compcall_arglist, at fortran/resolve.c:5837
Date: Fri, 10 Nov 2017 15:41:00 -0000
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--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to janus from comment #1)
> This draft patch fixes the ICE:
... and regtests cleanly!
>From gcc-bugs-return-581478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 15:44:15 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82929] [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400
Date: Fri, 10 Nov 2017 15:44:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed, thanks.
>From gcc-bugs-return-581479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 16:14:24 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Fri, 10 Nov 2017 16:14:00 -0000
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Thanks for working this out! The patch looks good to me.
No, I disagree, the patch only papers over the problem.
> I wonder how we ended up with such contradictory block at the first place? Was
> it introduced by someone between the last expensive cfg cleanup and bb-reorder?
Yes, that's what needs to be investigated and probably fixed.
>From gcc-bugs-return-581480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 16:21:31 2017
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From: "noloader at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/79885] --with-build-sysroot= does not get honored throughout the build (fix-includes, CPP, CXXCPP, configure-stage2)
Date: Fri, 10 Nov 2017 16:21:00 -0000
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Jeffrey Walton <noloader at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |noloader at gmail dot com
--- Comment #8 from Jeffrey Walton <noloader at gmail dot com> ---
I don't know how much of this observation applies, but:
$ ./configure --help | grep sysroot
--with-sysroot[=DIR] Search for dependent libraries within DIR (or the
compiler's sysroot if not specified).
The description does not say anything about headers; it only says libraries.
I am certainly not advocating for it. In fact, I came across this bug report
because a --with-sysroot (not --with-build-sysroot) is not being honored, and
headers seem to be the problem.
By the way, when compiling the compiler, I though --host and --target are used.
"Build" indicates the machine the tools are running on. So wouldn't that be
--with-host-sysroot or --with-target-sysroot?
>From gcc-bugs-return-581481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 16:36:03 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Fri, 10 Nov 2017 16:36:00 -0000
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 10 16:35:26 2017
New Revision: 254630
URL: https://gcc.gnu.org/viewcvs?rev=254630&root=gcc&view=rev
Log:
PR c/81117 - Improve buffer overflow checking in strncpy
gcc/ChangeLog:
PR c/81117
* builtins.c (compute_objsize): Handle arrays that
compute_builtin_object_size likes to fail for. Make extern.
* builtins.h (compute_objsize): Declare.
(check_strncpy_sizes): New function.
(expand_builtin_strncpy): Call check_strncpy_sizes.
* gimple-fold.c (gimple_fold_builtin_strncpy): Implement
-Wstringop-truncation.
(gimple_fold_builtin_strncat): Same.
* gimple.c (gimple_build_call_from_tree): Set call location.
* tree-ssa-strlen.c (strlen_to_stridx): New global variable.
(maybe_diag_bound_equal_length, is_strlen_related_p): New functions.
(handle_builtin_stxncpy, handle_builtin_strncat): Same.
(handle_builtin_strlen): Use strlen_to_stridx.
(strlen_optimize_stmt): Handle flavors of strncat, strncpy, and
stpncpy.
Use strlen_to_stridx.
(pass_strlen::execute): Release strlen_to_stridx.
* doc/invoke.texi (-Wsizeof-pointer-memaccess): Document enhancement.
(-Wstringop-truncation): Document new option.
gcc/ada/ChangeLog:
PR c/81117
* ada/adadecode.c (__gnat_decode): Use memcpy instead of strncpy.
* ada/argv.c (__gnat_fill_arg, __gnat_fill_env): Same.
gcc/c-family/ChangeLog:
PR c/81117
* c-common.c (catenate_strings): Use memcpy instead of strncpy.
* c-warn.c (sizeof_pointer_memaccess_warning): Handle arrays.
* c.opt (-Wstringop-truncation): New option.
gcc/fortran/ChangeLog:
PR c/81117
* gcc/fortran/decl.c (build_sym): Use strcpy instead of strncpy.
gcc/objc/ChangeLog:
PR c/81117
* objc-encoding.c (encode_type): Use memcpy instead of strncpy.
gcc/testsuite/ChangeLog:
PR c/81117
* c-c++-common/Wsizeof-pointer-memaccess3.c: New test.
* c-c++-common/Wstringop-overflow.c: Same.
* c-c++-common/Wstringop-truncation.c: Same.
* c-c++-common/Wsizeof-pointer-memaccess2.c: Adjust.
* c-c++-common/attr-nonstring-2.c: New test.
* g++.dg/torture/Wsizeof-pointer-memaccess1.C: Adjust.
* g++.dg/torture/Wsizeof-pointer-memaccess2.C: Same.
* gcc.dg/torture/pr63554.c: Same.
* gcc.dg/Walloca-1.c: Disable macro tracking.
Added:
trunk/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess3.c
trunk/gcc/testsuite/c-c++-common/Wstringop-overflow.c
trunk/gcc/testsuite/c-c++-common/Wstringop-truncation.c
trunk/gcc/testsuite/c-c++-common/attr-nonstring-1.c
trunk/gcc/testsuite/c-c++-common/attr-nonstring-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/adadecode.c
trunk/gcc/ada/argv.c
trunk/gcc/builtins.c
trunk/gcc/builtins.h
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-warn.c
trunk/gcc/c-family/c.opt
trunk/gcc/doc/invoke.texi
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/gimple-fold.c
trunk/gcc/gimple.c
trunk/gcc/objc/ChangeLog
trunk/gcc/objc/objc-encoding.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c
trunk/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C
trunk/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess2.C
trunk/gcc/testsuite/gcc.dg/Walloca-1.c
trunk/gcc/testsuite/gcc.dg/builtin-stpncpy.c
trunk/gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c
trunk/gcc/testsuite/gcc.dg/torture/pr63554.c
trunk/gcc/tree-ssa-strlen.c
>From gcc-bugs-return-581482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 16:45:25 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/82597] [8 Regression] ICE at -O2 and -O3 x86_64-linux-gnu in the 32-bit mode: in extract_constrain_insn, at recog.c:2207
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:02:09 2017
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Subject: [Bug target/82941] New: Missing vzeroupper with -mavx512f -O2
Date: Fri, 10 Nov 2017 17:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82941
Bug ID: 82941
Summary: Missing vzeroupper with -mavx512f -O2
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: pavel.v.chupin at gmail dot com, ubizjak at gmail dot com
Target Milestone: ---
Target: x86
[hjl@gnu-6 vzeroupper-skx-1]$ cat bar.c
#include <immintrin.h>
extern __m512d y, z;
void
foo ()
{
z = y;
}
[hjl@gnu-6 vzeroupper-skx-1]$ make bar.s
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -march=skylake-avx512 -S
bar.c
[hjl@gnu-6 vzeroupper-skx-1]$ cat bar.s
.file "bar.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB4897:
.cfi_startproc
vmovapd y(%rip), %zmm0
vmovapd %zmm0, z(%rip)
ret
.cfi_endproc
.LFE4897:
.size foo, .-foo
.ident "GCC: (GNU) 8.0.0 20171110 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 vzeroupper-skx-1]$
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Subject: [Bug target/82942] New: Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Fri, 10 Nov 2017 17:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942
Bug ID: 82942
Summary: Generate vzeroupper with -mavx512f -mno-avx512er -O2
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: pavel.v.chupin at gmail dot com, ubizjak at gmail dot com
Target Milestone: ---
Target: x86
When AVX512F is enabled, the vzerouppoer optimization is disabled.
This is intended only for Xeon Phi, not for Skylake server which
also has AVX512F. Since AVX512ER is unique to Xeon Phi and will
never appear in non Xeon Phi processors, the vzerouppoer optimization
should be enabled when AVX512F is enabled, but AVX512ER isn't:
[hjl@gnu-6 vzeroupper-skx-1]$ cat foo.c
#include <immintrin.h>
extern __m512d y, z;
void
foo ()
{
z = y;
}
[hjl@gnu-6 vzeroupper-skx-1]$ make foo.s
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -mavx512f -mno-avx512er -O2
-S foo.c
c[hjl@gnu-6 vzeroupper-skx-1]$ cat foo.s
.file "foo.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB4897:
.cfi_startproc
vmovapd y(%rip), %zmm0
vmovapd %zmm0, z(%rip)
ret
.cfi_endproc
.LFE4897:
.size foo, .-foo
.ident "GCC: (GNU) 8.0.0 20171110 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 vzeroupper-skx-1]$
>From gcc-bugs-return-581486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:09:49 2017
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Fri, 10 Nov 2017 17:09:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-10
Blocks| |82941
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82941
[Bug 82941] Missing vzeroupper with -march=skylake-avx512 -O2
>From gcc-bugs-return-581485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:09:35 2017
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From: "dreich at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82943] New: Error derived type-bound procedure PASS(this)
Date: Fri, 10 Nov 2017 17:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82943
Bug ID: 82943
Summary: Error derived type-bound procedure PASS(this)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Created attachment 42582
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42582&action=edit
Sample program test case showing error
The attached code works without the (n) in the typedef and (n=*) or (*) in the
class line and works in Intel Fortran as submitted here. I tested this with
last night's update in svn gfortran 8 with Cygwin and Eclipse PTP Photran.
I looked through the test suite and found some test cases with NOPASS and
PASS(self) but non with an argument like this.
Error: Argument 'this' of 'foo' with PASS(this) at (1) must be of the
derived-type 'typedef'
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82641] Unable to enable crc32 for a certain function with target attribute on ARM (aarch32)
Date: Fri, 10 Nov 2017 17:15:00 -0000
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--- Comment #9 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Fri Nov 10 17:14:28 2017
New Revision: 254632
URL: https://gcc.gnu.org/viewcvs?rev=254632&root=gcc&view=rev
Log:
2017-11-10 Tamar Christina <tamar.christina@arm.com>
PR target/82641
* config/arm/arm.c
(arm_option_override): Refactor.
(arm_option_reconfigure_globals): New.
(arm_options_perform_arch_sanity_checks): New.
* config/arm/arm-protos.h (arm_option_reconfigure_globals): New
prototype.
(arm_options_perform_arch_sanity_checks): Likewise
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm-protos.h
trunk/gcc/config/arm/arm.c
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Fri, 10 Nov 2017 17:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
class pass_insert_vzeroupper : public rtl_opt_pass
{
public:
pass_insert_vzeroupper(gcc::context *ctxt)
: rtl_opt_pass(pass_data_insert_vzeroupper, ctxt)
{}
/* opt_pass methods: */
virtual bool gate (function *)
{
return TARGET_AVX && !TARGET_AVX512F
&& TARGET_VZEROUPPER && flag_expensive_optimizations
&& !optimize_size;
}
virtual unsigned int execute (function *)
{
return rest_of_handle_insert_vzeroupper ();
}
}; // class pass_insert_vzeroupper
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42583
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42583&action=edit
An untested patch
>From gcc-bugs-return-581490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:40:43 2017
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
> return TARGET_AVX && !TARGET_AVX512F
Should !TARGET_AVX512F be changed to !TARGET_AVX152ER in gate function?
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82943] Error derived type-bound procedure PASS(this)
Date: Fri, 10 Nov 2017 17:47:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-10
Blocks| |82173
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] Parameterized derived type errors
>From gcc-bugs-return-581493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:50:38 2017
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Fri, 10 Nov 2017 17:50:00 -0000
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #3)
> (In reply to Uroš Bizjak from comment #1)
> > return TARGET_AVX && !TARGET_AVX512F
>
> Should !TARGET_AVX512F be changed to !TARGET_AVX152ER in gate function?
Yes, the untested patch is updated.
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42584
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42584&action=edit
An untested patch
>From gcc-bugs-return-581494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 17:53:57 2017
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Subject: [Bug other/82880] [6/7/8 Regression] gcc --help=target --help=optimizers hangs on mips
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Your patch is the right fix, when it is static on the second invocation the new
p is not stored into it, and register_pass doesn't save the address it is
passed anywhere, just remembers the pass and from the other fields determines
where to put it.
Please post it to gcc-patches with a ChangeLog entry.
>From gcc-bugs-return-581495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 18:02:14 2017
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Subject: [Bug middle-end/82928] [8 Regression] glibc test-tgmath3 ICE on powerpc64le
Date: Fri, 10 Nov 2017 18:02:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Already reported.
*** This bug has been marked as a duplicate of bug 82333 ***
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Subject: [Bug middle-end/82333] [8 Regression] powerpc64le _Float128 ICE in as_a, at machmode.h:345
Date: Fri, 10 Nov 2017 18:02:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amodra at gmail dot com
--- Comment #5 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
*** Bug 82928 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-581497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 18:09:13 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82944] New: missing -Wstringop-truncation on strncpy due to system header macro
Date: Fri, 10 Nov 2017 18:09:00 -0000
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Bug ID: 82944
Summary: missing -Wstringop-truncation on strncpy due to system
header macro
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The -Wstringop-truncation warning added in GCC 8.0 via r254630 for bug 81117 is
specifically intended to highlight likely unintended uses of the strncpy
function that truncate the terminating NUL charcter from the source string. An
example of such a misuse given in the request is the following:
char buf[2];
void test (const char* str)
{
strncpy (buf, str, strlen (str));
}
As it turns out, although the new checker works correctly when strncpy is
declared as a function, when it's defined as a shadow macro in a system header
(as happens to be the case in in Glibc 2.24 and prior) the warning is
suppressed:
$ (set -x && cat pr81117.c && for opt in '' '--include=string.h'; do gcc -O2 -S
-Wall -Wextra $opt pr81117.c; done)
+ cat pr81117.c
extern __SIZE_TYPE__ strlen (const char*);
extern char* strncpy (char*, const char*, __SIZE_TYPE__);
char buf[2];
void test (const char* str)
{
strncpy (buf, str, strlen (str));
}
+ for opt in ''\'''\''' ''\''--include=string.h'\'''
+ /ssd/build/gcc-svn/gcc/xgcc -B /ssd/build/gcc-svn/gcc -O2 -S -Wall -Wextra
pr81117.c
pr81117.c: In function ‘test’:
pr81117.c:8:3: warning: ‘strncpy’ output truncated before terminating nul
copying as many bytes from a string as its length [-Wstringop-truncation]
strncpy (buf, str, strlen (str));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ for opt in ''\'''\''' ''\''--include=string.h'\'''
+ /ssd/build/gcc-svn/gcc/xgcc -B /ssd/build/gcc-svn/gcc -O2 -S -Wall -Wextra
--include=string.h pr81117.c
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Fri, 10 Nov 2017 18:11:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82944
Resolution|--- |FIXED
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
The enhancement has been committed in r254630. With the slightly modified test
case GCC 8.0 produces the warnings below. Unfortunately, including <string.h>
instead of explicitly declaring strncpy may suppress a number of the warnings,
including the one for the last call, when strncpy is defined as a macro in one
of the system headers (as in Glibc 2.24 and prior).
I've raised bug 82944 for the system header problem and so I'm resolving this
request as fixed.
$ cat pr81117.c && gcc -O2 -S -Wall -Wextra pr81117.c
extern __SIZE_TYPE__ strlen (const char*);
extern char* strncpy (char*, const char*, __SIZE_TYPE__);
char buf[2];
void test (const char* str)
{
strncpy (buf, "12345", sizeof ("12345")); // 1
strncpy (buf, "12345", strlen ("12345")); // 2
strncpy (buf, str, sizeof (str)); // 3
strncpy (buf, str, strlen (str)); // 4
}
pr81117.c: In function ‘test’:
pr81117.c:8:35: warning: argument to ‘sizeof’ in ‘strncpy’ call is the same
expression as the source; did you mean to use the size of the destination?
[-Wsizeof-pointer-memaccess]
strncpy (buf, "12345", sizeof ("12345")); // 1
^
pr81117.c:10:31: warning: argument to ‘sizeof’ in ‘strncpy’ call is the same
expression as the source; did you mean to provide an explicit length?
[-Wsizeof-pointer-memaccess]
strncpy (buf, str, sizeof (str)); // 3
^
pr81117.c:9:5: warning: ‘strncpy’ output truncated before terminating nul
copying 5 bytes from a string of the same length [-Wstringop-truncation]
strncpy (buf, "12345", strlen ("12345")); // 2
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pr81117.c:8:5: warning: array subscript is above array bounds [-Warray-bounds]
strncpy (buf, "12345", sizeof ("12345")); // 1
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pr81117.c:11:5: warning: ‘strncpy’ output truncated before terminating nul
copying as many bytes from a string as its length [-Wstringop-truncation]
strncpy (buf, str, strlen (str)); // 4
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pr81117.c:8:5: warning: ‘__builtin_memcpy’ writing 2 bytes into a region of
size 0 overflows the destination [-Wstringop-overflow=]
strncpy (buf, "12345", sizeof ("12345")); // 1
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pr81117.c:9:5: warning: ‘__builtin_memcpy’ writing 5 bytes into a region of
size 2 overflows the destination [-Wstringop-overflow=]
strncpy (buf, "12345", strlen ("12345")); // 2
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pr81117.c:10:5: warning: ‘strncpy’ writing 8 bytes into a region of size 2
overflows the destination [-Wstringop-overflow=]
strncpy (buf, str, sizeof (str)); // 3
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-581499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 18:16:35 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Fri, 10 Nov 2017 18:16:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #8)
> > Thanks for working this out! The patch looks good to me.
>
> No, I disagree, the patch only papers over the problem.
>
> > I wonder how we ended up with such contradictory block at the first place? Was
> > it introduced by someone between the last expensive cfg cleanup and bb-reorder?
>
> Yes, that's what needs to be investigated and probably fixed.
Hi Eric.
I'm also not happy about the patch. Can you please help me with the bbro pass.
I know you have some skill. Do you think problem is in traces how are traced
(more precisely why are the problematic blocks selected as hot)?
Or merging of the traces? I know it's problematic to reproduce as it happens in
profiled bootstrap, but I would appreciate any help ;)
>From gcc-bugs-return-581500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 18:22:50 2017
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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Fri, 10 Nov 2017 18:22:00 -0000
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--- Comment #10 from Jan Hubicka <hubicka at ucw dot cz> ---
> > No, I disagree, the patch only papers over the problem.
> >
> > > I wonder how we ended up with such contradictory block at the first place? Was
> > > it introduced by someone between the last expensive cfg cleanup and bb-reorder?
> >
> > Yes, that's what needs to be investigated and probably fixed.
>
> Hi Eric.
>
> I'm also not happy about the patch. Can you please help me with the bbro pass.
> I know you have some skill. Do you think problem is in traces how are traced
> (more precisely why are the problematic blocks selected as hot)?
> Or merging of the traces? I know it's problematic to reproduce as it happens in
> profiled bootstrap, but I would appreciate any help ;)
Most likely the problem is insane profile before BBro itself. If it is indeed
cfgcleanup with CLEANUP_EXPENSIVE needed to turn the basic block cold, I would
say any pass between last invocation and bbro might have caused the pattern
(possibly becuase the profile was nonsential even earlier). Grepping for
it:
bb-reorder.c: cfg_layout_initialize (CLEANUP_EXPENSIVE);
bb-reorder.c: cleanup_cfg (CLEANUP_EXPENSIVE);
bt-load.c: cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
cfgcleanup.c: else if (mode & CLEANUP_EXPENSIVE)
cfgcleanup.c: if ((mode & CLEANUP_EXPENSIVE)
cfgcleanup.c: if ((mode & CLEANUP_EXPENSIVE) && !reload_completed
cfgcleanup.c: cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0)
function.c: cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
ifcvt.c: cleanup_cfg (CLEANUP_EXPENSIVE);
ira.c: cleanup_cfg (CLEANUP_EXPENSIVE);
probably last cleanup was done by rest_of_handle_thread_prologue_and_epilogue
and at that time cfgcleanup did not decided yet to do the move.
IMO turning random hot block into cold is not safe operatoin after
bbro is finished and thus Martin's patch preventing it is good. We can indeed
track down the real cause (I plan to iterate over profile updating bugs next
week)
Honza
>From gcc-bugs-return-581501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 20:45:47 2017
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Subject: [Bug c++/82924] gcc gives no warning for comparing unsigned integer < 0 even with -Wextra enabled
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think that warning is simply disabled in templates, to avoid warnings about
(x < 0) which would depend on whether T is signed or unsigned, but is not a
helpful warning in general. In this case we know that (y < 0) is always an
unsigned type.
>From gcc-bugs-return-581502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 20:58:03 2017
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Subject: [Bug libstdc++/82917] [8 regression] 27_io/basic_{f,if,of}stream/open/char/path.cc fails
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-581503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 20:59:10 2017
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Subject: [Bug tree-optimization/82945] New: add warning for passing non-strings to functions that expect string arguments
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Bug ID: 82945
Summary: add warning for passing non-strings to functions that
expect string arguments
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The -Wstringop-truncation warning new in GCC 8.0 warns about calls to strncpy
and strncat that may non nul-terminate the copied string. Attribute nonstring
was also added to make it possible to suppress the warning for character arrays
that are not meant to be nul-terminated. However, using such arrays as
arguments to functions that expect nul-terminated string arguments is accepted
with no warning. To detect such misuses of the non-nul terminated arrays GCC
should issue a warning when they are passed to string functions like strlen.
$ cat c.c && gcc -O2 -S -Wall c.c
char a[4];
int f (void)
{
__builtin_strncpy (a, "1234", 4); // -Wstringop-truncation (good)
return __builtin_strlen (a); // because this is undefined
}
char b[4] __attribute__ ((nonstring));
int g (void)
{
__builtin_strncpy (b, "1234", 4); // no warning because of nonstring
return __builtin_strlen (b); // but this is also undefined
}
c.c: In function ‘f’:
c.c:5:3: warning: ‘__builtin_strncpy’ output truncated before terminating nul
copying 4 bytes from a string of the same length [-Wstringop-truncation]
__builtin_strncpy (a, "1234", 4); // -Wstringop-truncation
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-581504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 21:32:23 2017
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Subject: [Bug fortran/82886] ICE with -finit-derived in gfc_conv_expr, at fortran/trans-expr.c:7807
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Fritz Reese <foreese at gcc dot gnu.org> changed:
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--- Comment #4 from Fritz Reese <foreese at gcc dot gnu.org> ---
> https://gcc.gnu.org/ml/fortran/2017-11/msg00059.html
Fix pending review.
>From gcc-bugs-return-581505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 21:44:01 2017
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Subject: [Bug libstdc++/82917] [8 regression] 27_io/basic_{f,if,of}stream/open/char/path.cc fails
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Nov 10 21:43:24 2017
New Revision: 254638
URL: https://gcc.gnu.org/viewcvs?rev=254638&root=gcc&view=rev
Log:
PR libstdc++/82917 add missing returns in <fstream>
PR libstdc++/82917
* include/std/fstream (basic_ifstream::open, basic_ofstream::open)
(basic_fstream::open): Fix missing return.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/fstream
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 10 22:48:43 2017
New Revision: 254641
URL: https://gcc.gnu.org/viewcvs?rev=254641&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR c/81117
* config/darwin-c.c (framework_construct_pathname): Replace strncpy
with memcpy.
(find_subframework_file): Same.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/darwin-c.c
>From gcc-bugs-return-581507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 10 22:55:39 2017
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Subject: [Bug tree-optimization/82945] add warning for passing non-strings to functions that expect string arguments
Date: Fri, 10 Nov 2017 22:55:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-10
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'll submit a patch for this.
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Subject: [Bug libstdc++/82917] [8 regression] 27_io/basic_{f,if,of}stream/open/char/path.cc fails
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
fixed.
>From gcc-bugs-return-581509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 00:22:38 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Sat, 11 Nov 2017 00:22:00 -0000
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--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I know you have some skill. Do you think problem is in traces how are traced
> (more precisely why are the problematic blocks selected as hot)?
> Or merging of the traces? I know it's problematic to reproduce as it happens
> in profiled bootstrap, but I would appreciate any help ;)
Yes, this could be during the connection of the traces, which involves copying
basic blocks. When you do this, you redirect edges, which in turns changes the
dominance relationship and thus can turn a hot block into a cold block.
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Sat, 11 Nov 2017 00:23:00 -0000
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--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> IMO turning random hot block into cold is not safe operatoin after
> bbro is finished and thus Martin's patch preventing it is good. We can
> indeed track down the real cause (I plan to iterate over profile updating bugs
> next week)
We will never track the real cause if we paper over it...
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Subject: [Bug fortran/82886] ICE with -finit-derived in gfc_conv_expr, at fortran/trans-expr.c:7807
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--- Comment #5 from Fritz Reese <foreese at gcc dot gnu.org> ---
Author: foreese
Date: Sat Nov 11 00:47:53 2017
New Revision: 254648
URL: https://gcc.gnu.org/viewcvs?rev=254648&root=gcc&view=rev
Log:
2017-11-10 Fritz Reese <fritzoreese@gmail.com>
PR fortran/82886
gcc/fortran/ChangeLog:
PR fortran/82886
* gfortran.h (gfc_build_init_expr): New prototype.
* invoke.texi (finit-derived): Update documentation.
* expr.c (gfc_build_init_expr): New, from gfc_build_default_init_expr.
(gfc_build_default_init_expr): Redirect to gfc_build_init_expr(,,false)
(component_initializer): Force building initializers using
gfc_build_init_expr(,,true).
gcc/testsuite/ChangeLog:
PR fortran/82886
* gfortran.dg/init_flag_16.f03: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/init_flag_16.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/invoke.texi
trunk/gcc/testsuite/ChangeLog
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82946] New: member pointer defeats strlen optimization involving a string literal
Date: Sat, 11 Nov 2017 00:57:00 -0000
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Bug ID: 82946
Summary: member pointer defeats strlen optimization involving a
string literal
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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In the program below, while GCC optimizes the strlen call in f() to a constant
it doesn't do the same for the equivalent function g().
I suspect this is caused by the same underlying assumptions as pr80944: i.e.,
that the strcpy (a->d, "123") call could change a->d if a->d pointed at or into
itself. While that might be true in other circumstances, it's not possible
here. Since the array at a->d is subsequently accessed by the call to strlen,
the strcpy call cannot change a->d in a valid program because "123" (or any
other string literal) cannot be a valid representation of a pointer. (The only
way for a conforming program to obtain a valid pointer is by assigning to it
the value of another valid pointer. Even if the bit pattern of the literal
"123" happened to match a valid address in a program, copying the literal into
a pointer and then using that pointer is undefined.)
So a->d can be assumed not to change in either function and the strlen
optimization below is safe in both.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout a.c
char* strcpy (char*, const char*);
__SIZE_TYPE__ strlen (const char*);
struct A { char *d; };
unsigned f (struct A *a)
{
char *d = a->d;
strcpy (d, "123");
return strlen (d); // folded into 3
}
unsigned g (struct A *a)
{
strcpy (a->d, "123");
return strlen (a->d); // not folded but can be
}
;; Function f (f, funcdef_no=0, decl_uid=1898, cgraph_uid=0, symbol_order=0)
f (struct A * a)
{
char * d;
<bb 2> [local count: 10000]:
d_4 = a_3(D)->d;
__builtin_memcpy (d_4, "123", 4);
return 3;
}
;; Function g (g, funcdef_no=1, decl_uid=1902, cgraph_uid=1, symbol_order=1)
g (struct A * a)
{
char * _1;
char * _2;
long unsigned int _3;
unsigned int _7;
<bb 2> [local count: 10000]:
_1 = a_5(D)->d;
__builtin_memcpy (_1, "123", 4);
_2 = a_5(D)->d;
_3 = strlen (_2);
_7 = (unsigned int) _3;
return _7;
}
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Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80944
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I should add that a similar argument could be made in pr80944. The difference
is that the other report deals with memset(s->a, 0, ...) which, although
strictly also prevented from creating valid pointers (including null pointers),
is commonly used by programs to create null pointers.
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Subject: [Bug c++/80871] Template partial ordering considered non-ambiguous with deduced and non-deduced parameter packs
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Vittorio Romeo <vittorio.romeo at outlook dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vittorio.romeo at outlook dot com
--- Comment #1 from Vittorio Romeo <vittorio.romeo at outlook dot com> ---
Got hit again today, while trying to write an `overload(...)` class:
template <typename... Ts>
struct overload : Ts...
{
template <typename... TFwds>
constexpr overload(TFwds&&... xs)
: Ts{FWD(xs)}...
{
}
using Ts::operator()...;
};
template <typename... TFwds>
overload(TFwds&&...) -> overload<std::decay_t<TFwds>...>;
With the code above
auto o = overload{[]{}};
fails to compile. See: https://godbolt.org/g/Rb3ZKt
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Subject: [Bug fortran/82937] [F03] associate non-standard bounds are lost for associating entity
Date: Sat, 11 Nov 2017 11:01:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-11
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAIK the lower bounds of array slices are always 1:
write(*,"(A,2('(',I2,',',I2,')'))") "arr(1,1,:,:) bounds are
",lbound(arr(1,1,:,:),1),&
& ubound(arr(1,1,:,:),1),&
& lbound(arr(1,1,:,:),2),ubound(arr(1,1,:,:),2)
arr(1,1,:,:) bounds are ( 1, 7)( 1,10)
So I am inclined to consider that
myarr bounds are ( 1, 7)( 1,10)
is correct and also the error with -fcheck=bounds. IMO this PR is INVALID.
If you disagree, you may ask the question on comp.lang.fortran.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/82948] New: [8 Regression] prefix.c:202:15: error: 'char* strncpy(char*, const char*, size_t)' destination unchanged after copying no bytes [-Werror=stringop-truncation]
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Bug ID: 82948
Summary: [8 Regression] prefix.c:202:15: error: 'char*
strncpy(char*, const char*, size_t)' destination
unchanged after copying no bytes
[-Werror=stringop-truncation]
Product: gcc
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Hello,
I cannot bootstrap currently (r254649) on gcc112
(powerpc64le-unknown-linux-gnu) with --with-system-zlib --disable-nls
--enable-languages=all,obj-c++,go --enable-host-shared
/home/glisse/pristine/gcc/prefix.c: In function 'char* translate_name(char*)':
/home/glisse/pristine/gcc/prefix.c:202:15: error: 'char* strncpy(char*, const
char*, size_t)' destination unchanged after copying no bytes
[-Werror=stringop-truncation]
strncpy (key, &name[1], keylen);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/home/glisse/pristine/gcc/prefix.c:202:15: error: 'char* strncpy(char*, const
char*, size_t)' destination unchanged after copying no bytes
[-Werror=stringop-truncation]
/home/glisse/pristine/gcc/prefix.c:202:15: error: 'char* strncpy(char*, const
char*, size_t)' destination unchanged after copying no bytes
[-Werror=stringop-truncation]
/home/glisse/pristine/gcc/prefix.c:202:15: error: 'char* strncpy(char*, const
char*, size_t)' destination unchanged after copying no bytes
[-Werror=stringop-truncation]
cc1plus: all warnings being treated as errors
make[3]: *** [prefix.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm gfortran.pod fsf-funding.pod gcov.pod gpl.pod cpp.pod gfdl.pod gccgo.pod
gcc.pod gcov-dump.pod gcov-tool.pod
make[3]: Leaving directory `/home/glisse/test/pristine/build/gcc'
make[2]: *** [all-stage2-gcc] Error 2
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Subject: [Bug c++/81486] Class template argument deduction fails with (), succeeds with {}
Date: Sat, 11 Nov 2017 14:04:00 -0000
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--- Comment #2 from Vittorio Romeo <vittorio.romeo at outlook dot com> ---
Here's a snippet that seems to reproduce this bug, even without an explicit
deduction guide:
template <typename... Ts>
struct foo
{
template <typename... Us>
foo(Us...) { }
};
int main()
{
auto f = foo();
}
On godbolt:
https://godbolt.org/g/CgqLq5
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Subject: [Bug c++/82949] New: internal compiler error: in cp_parser_late_return_type_opt, at cp/parser.c:16698
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g++ (Debian 4.7.2-5astra.se1) 4.7.2
Copyright (C) 2012 Free Software Foundation, Inc.
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--- Comment #13 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Nov 11 15:53:18 2017
New Revision: 254654
URL: https://gcc.gnu.org/viewcvs?rev=254654&root=gcc&view=rev
Log:
Backport from mainline
2017-02-25 John David Anglin <danglin@gcc.gnu.org>
PR target/68739
* inclhack.def (hpux11_pthread_pointer): New fix.
(hpux11_pthread_const): Adjust to remove void * cast from define.
* fixincl.x: Regenerate.
* tests/base/sys/pthread.h [HPUX11_PTHREAD_CONST_CHECK]: Update tests.
Modified:
branches/gcc-6-branch/fixincludes/ChangeLog
branches/gcc-6-branch/fixincludes/fixincl.x
branches/gcc-6-branch/fixincludes/inclhack.def
branches/gcc-6-branch/fixincludes/tests/base/sys/pthread.h
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Subject: [Bug testsuite/81056] [7/8 Regression] FAIL: 17_intro/names.cc (test for excess errors)
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--- Comment #6 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Sat Nov 11 16:11:50 2017
New Revision: 254655
URL: https://gcc.gnu.org/viewcvs?rev=254655&root=gcc&view=rev
Log:
Backport from mainline
2017-08-20 John David Anglin <danglin@gcc.gnu.org>
PR testsuite/81056
* testsuite/17_intro/names.cc: Undef 'd' and 'r' on __hpux__.
Modified:
branches/gcc-6-branch/libstdc++-v3/ChangeLog
branches/gcc-6-branch/libstdc++-v3/testsuite/17_intro/names.cc
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--- Comment #2 from Julien ÉLIE <julien at trigofacile dot com> ---
Other points:
6/ -Wsuggest-final-types and -Wsuggest-final-methods should be mentioned for
C++ (and maybe Objective-C++) only.
7/ -Wc++11-compat and -Wc++14-compat are present in the -Wall list but without
the mention for C++ and Objective-C++. I believe it should be mentioned.
>From gcc-bugs-return-581523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 17:19:02 2017
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Subject: [Bug target/79964] Cortex A53 codegen still not optimal
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PeteVine <tulipawn at gmail dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from PeteVine <tulipawn at gmail dot com> ---
In case the changed behaviour of -frename-registers is not actually a feature,
please reopen.
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Subject: [Bug target/62011] False Data Dependency in popcnt instruction
Date: Sat, 11 Nov 2017 17:40:00 -0000
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Travis Downs <travis.downs at gmail dot com> changed:
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CC| |travis.downs at gmail dot com
--- Comment #15 from Travis Downs <travis.downs at gmail dot com> ---
For what it's worth and because Richard asked for it above, there is are Intel
erratum for this, at least as of Haswell, for example HSD146: "POPCNT
Instruction May Take Longer to Execute Than Expected".
It mentions only popcnt, and I found it for Haswell, Skylake (SKL029) and
Broadwell. The text is:
POPCNT Instruction May Take Longer to Execute Than Expected
Problem:
POPCNT instruction execution with a 32 or 64 bit operand may be delayed until
previous non-dependent instructions have executed.
Implication:
Software using the POPCNT instruction may experience lower performance than
expected.
Workaround:
None identified
>From gcc-bugs-return-581525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 17:44:24 2017
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Subject: [Bug bootstrap/82948] [8 Regression] prefix.c:202:15: error: 'char* strncpy(char*, const char*, size_t)' destination unchanged after copying no bytes [-Werror=stringop-truncation]
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Nov 11 17:43:48 2017
New Revision: 254658
URL: https://gcc.gnu.org/viewcvs?rev=254658&root=gcc&view=rev
Log:
PR bootstrap/82948 - prefix.c:202:15: error: 'char* strncpy(char*, const char*,
size_t)' destination unchanged after copying no bytes
gcc/ChangeLog:
PR bootstrap/82948
* prefic.c (translate_name): Replace strncpy with memcpy to
avoid -Wstringop-truncation.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/prefix.c
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Subject: [Bug bootstrap/82948] [8 Regression] prefix.c:202:15: error: 'char* strncpy(char*, const char*, size_t)' destination unchanged after copying no bytes [-Werror=stringop-truncation]
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le-*-linux
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
r254658 should avoid the warning.
>From gcc-bugs-return-581527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 18:04:58 2017
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
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--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sat Nov 11 18:04:21 2017
New Revision: 254659
URL: https://gcc.gnu.org/viewcvs?rev=254659&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR c/81117
* doc/extend.texi (attribute nonstring): Remove spurious argument.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82950] New: possible strlen optimization for memcmp/strcmp of arrays
Date: Sat, 11 Nov 2017 18:26:00 -0000
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Bug ID: 82950
Summary: possible strlen optimization for memcmp/strcmp of
arrays
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
While testing some unrelated work I noticed that GCC doesn't eliminate the call
to strcmp in the program below even though it could based on the knowledge that
the two arrays a and b contain a copy of the same string. A nsimilar
optimization is possible for memcpy (regardless of the size specified by the
third argument). It seems that a good place to add this optimization might be
the tree-ssa-strlen.c pass.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout c.c
char a[4];
char b[4];
int f (void)
{
__builtin_strcpy (a, "abc");
__builtin_strcpy (b, "abc");
return __builtin_strcmp (a, b); // not folded but could be
}
int g (const char *s)
{
__builtin_strcpy (a, s);
__builtin_strcpy (b, s);
return __builtin_strcmp (a, b); // not folded but could be
}
;; Function f (f, funcdef_no=0, decl_uid=1893, cgraph_uid=0, symbol_order=2)
f ()
{
int _4;
<bb 2> [local count: 10000]:
MEM[(char * {ref-all})&a] = "abc";
MEM[(char * {ref-all})&b] = "abc";
_4 = __builtin_strcmp (&a, &b); [tail call]
return _4;
}
;; Function g (g, funcdef_no=1, decl_uid=1896, cgraph_uid=1, symbol_order=3)
g (const char * s)
{
int _5;
<bb 2> [local count: 10000]:
__builtin_strcpy (&a, s_2(D));
__builtin_strcpy (&b, s_2(D));
_5 = __builtin_strcmp (&a, &b); [tail call]
return _5;
}
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Subject: [Bug tree-optimization/82950] possible strlen optimization for memcmp/strcmp of arrays
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81703
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Handling the constant string case and the memcpy case in tree-ssa-strlen.c
probably depends on resolving bug 81703.
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Subject: [Bug testsuite/82951] New: gcc.c-torture/execute/20040409-1.c undefined behavior
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82951
Bug ID: 82951
Summary: gcc.c-torture/execute/20040409-1.c undefined behavior
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: glisse at gcc dot gnu.org
Target Milestone: ---
While testing a VRP patch, I had failures for
gcc.c-torture/execute/20040409-[1-3].c. If I run them with
-fsanitize=undefined, I get
20040409-1.c:27:12: runtime error: signed integer overflow: 0 - -2147483648
cannot be represented in type 'int'
20040409-1.c:17:12: runtime error: signed integer overflow: -2147483648 +
-2147483648 cannot be represented in type 'int'
20040409-2.c:47:13: runtime error: signed integer overflow: 0 - -2147483648
cannot be represented in type 'int'
20040409-2.c:57:23: runtime error: signed integer overflow: 4660 - -2147483648
cannot be represented in type 'int'
20040409-2.c:27:13: runtime error: signed integer overflow: -2147483648 +
-2147483648 cannot be represented in type 'int'
20040409-2.c:37:23: runtime error: signed integer overflow: -2147478988 +
-2147483648 cannot be represented in type 'int'
20040409-2.c:111:18: runtime error: signed integer overflow: -2147483648 +
-2147478988 cannot be represented in type 'int'
20040409-3.c:27:14: runtime error: signed integer overflow: 0 - -2147483648
cannot be represented in type 'int'
20040409-3.c:17:14: runtime error: signed integer overflow: -2147483648 +
-2147483648 cannot be represented in type 'int'
Unless someone volunteers to improve the tests, I'll likely remove the
offending cases (and probably more since this is a grid and I don't want to
look for every cell) from those 3 files.
>From gcc-bugs-return-581531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 18:48:46 2017
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Subject: [Bug testsuite/82951] gcc.c-torture/execute/20040409-1.c undefined behavior
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Or I should just add -fwrapv since those tests were added to test an RTL
transformation ( https://gcc.gnu.org/ml/gcc-patches/2004-04/msg00615.html ).
>From gcc-bugs-return-581532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 11 19:42:42 2017
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Subject: [Bug target/62011] False Data Dependency in popcnt instruction
Date: Sat, 11 Nov 2017 19:42:00 -0000
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--- Comment #16 from Travis Downs <travis.downs at gmail dot com> ---
Also, this is fixed for Skylake for tzcnt and lzcnt but not popcnt.
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Subject: [Bug fortran/82932] [8 Regression] [OOP] ICE in update_compcall_arglist, at fortran/resolve.c:5837
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--- Comment #3 from janus at gcc dot gnu.org ---
Author: janus
Date: Sat Nov 11 21:54:41 2017
New Revision: 254660
URL: https://gcc.gnu.org/viewcvs?rev=254660&root=gcc&view=rev
Log:
2017-11-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/82932
* resolve.c (update_compcall_arglist): Improve error recovery,
remove a gcc_assert.
2017-11-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/82932
* gfortran.dg/typebound_call_29.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/typebound_call_29.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/82932] [8 Regression] [OOP] ICE in update_compcall_arglist, at fortran/resolve.c:5837
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #4 from janus at gcc dot gnu.org ---
Fixed in r254660. Closing.
>From gcc-bugs-return-581535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 00:49:34 2017
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Subject: [Bug c++/82952] New: Hang compiling with g++ -fsanitize=undefined -Wduplicated-branches
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Bug ID: 82952
Summary: Hang compiling with g++ -fsanitize=undefined
-Wduplicated-branches
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I ran into this while building Wireshark with g++ 7.2.1 revision 253932 on
openSUSE Tumbleweed x86_64. Running:
g++ -c hangs.cpp -std=c++11 -fsanitize=undefined -Wduplicated-branches
hangs for at least 25 minutes.
hangs.cpp is based off ui/qt/widgets/capture_filter_edit.cpp of commit
9d49e1316689ae05d31efc866f04ac12cd051085 in the Wireshark source tree.
The stack trace shows 340+ nested calls to inchash::add_expr, abbreviated to
... here:
#0 0x00000000013d0046 in iterative_hash ()
#1 0x000000000125cd00 in inchash::add_expr(tree_node const*, inchash::hash&,
unsigned int) ()
...
#344 0x000000000125cdfb in inchash::add_expr(tree_node const*, inchash::hash&,
unsigned int) ()
#345 0x00000000009b7dc3 in ?? ()
#346 0x000000000125cda7 in inchash::add_expr(tree_node const*, inchash::hash&,
unsigned int) ()
#347 0x000000000069dfb8 in do_warn_duplicated_branches_r(tree_node**, int*,
void*) ()
#348 0x0000000001260437 in walk_tree_1(tree_node**, tree_node* (*)(tree_node**,
int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ()
#349 0x0000000001260374 in walk_tree_without_duplicates_1(tree_node**,
tree_node* (*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**,
int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*,
default_hash_traits<tree_node*> >*)) ()
#350 0x00000000006837d2 in ?? ()
#351 0x0000000000659d83 in ?? ()
#352 0x0000000000dfd701 in finish_function(int) ()
#353 0x00000000005ecd97 in ?? ()
#354 0x000000000143bd59 in ?? ()
#355 0x0000000000dd63da in toplev::main(int, char**) ()
#356 0x0000000000dd7c7b in main ()
Compiler info:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/7 --enable-ssp --disable-libssp
--disable-libvtv --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-7 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic --build=x86_64-suse-linux
--host=x86_64-suse-linux
Thread model: posix
gcc version 7.2.1 20171020 [gcc-7-branch revision 253932] (SUSE Linux)
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--- Comment #1 from Ahmad Fatoum <ahmad at a3f dot at> ---
Created attachment 42587
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42587&action=edit
File that hangs g++
I didn't manage to reduce it by much, because of the halting problem. At least
it reliably shows the problem.
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Ahmad Fatoum <ahmad at a3f dot at> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-pc-linux-gnu
Host| |x86_64-pc-linux-gnu
Build| |revision 253932
--- Comment #2 from Ahmad Fatoum <ahmad at a3f dot at> ---
I missed that --with-bugurl=http://bugs.opensuse.org/ the first time. I just
built GCC's master branch (commit 179137d80882c7b6b58ee59eacf56fe6f8cc7596) and
it's reproducible
Using built-in specs.
COLLECT_GCC=/opt/cross/bin/x86_64-pc-linux-gnu-g++
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Subject: [Bug c++/82953] New: ICE in tree_check() ../../gcc/gcc/tree.h:3087
Date: Sun, 12 Nov 2017 10:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82953
Bug ID: 82953
Summary: ICE in tree_check() ../../gcc/gcc/tree.h:3087
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at inbox dot ru
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Created attachment 42588
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42588&action=edit
gcc-bug.ii
Originally reported in https://bugs.gentoo.org/636646
Minimal SIGSEGV reproducer (not valid c++) is:
class a;
template <class> class b {
static const b c;
const int *m_fn1();
};
template <class d> const b<d> b<d>::c;
template <class d> const int *b<d>::m_fn1() {
c.a::e
Crashes on gcc-7.2.0 and gcc-master as:
LANG=C ./bin/g++ -c gcc-bug.ii
gcc-bug.ii: In member function 'const int* b< <template-parameter-1-1>
>::m_fn1()':
gcc-bug.ii:8:8: internal compiler error: Segmentation fault
c.a::e
^
0xd937ef crash_signal
../../gcc/gcc/toplev.c:325
0x7fa1559ef03f ???
/usr/src/debug/sys-libs/glibc-2.26-r3/glibc-2.26/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7d66ad tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3087
0x7d66ad any_dependent_bases_p(tree_node*)
../../gcc/gcc/cp/search.c:2617
0x83ee52 finish_class_member_access_expr(cp_expr, tree_node*, bool, int)
../../gcc/gcc/cp/typeck.c:2848
0x733b98 cp_parser_postfix_dot_deref_expression
../../gcc/gcc/cp/parser.c:7693
0x740dde cp_parser_postfix_expression
../../gcc/gcc/cp/parser.c:7267
0x74472d cp_parser_unary_expression
../../gcc/gcc/cp/parser.c:8363
0x7214ac cp_parser_cast_expression
../../gcc/gcc/cp/parser.c:9131
0x721d47 cp_parser_binary_expression
../../gcc/gcc/cp/parser.c:9232
0x723864 cp_parser_assignment_expression
../../gcc/gcc/cp/parser.c:9519
0x7240d8 cp_parser_expression
../../gcc/gcc/cp/parser.c:9688
0x7262a8 cp_parser_expression_statement
../../gcc/gcc/cp/parser.c:11205
0x72d463 cp_parser_statement
../../gcc/gcc/cp/parser.c:11021
0x72e670 cp_parser_statement_seq_opt
../../gcc/gcc/cp/parser.c:11348
0x72e747 cp_parser_compound_statement
../../gcc/gcc/cp/parser.c:11302
0x748900 cp_parser_function_body
../../gcc/gcc/cp/parser.c:21837
0x748900 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/gcc/cp/parser.c:21874
0x74a33a cp_parser_function_definition_after_declarator
../../gcc/gcc/cp/parser.c:26765
0x74b07d cp_parser_function_definition_from_specifiers_and_declarator
../../gcc/gcc/cp/parser.c:26681
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.
gcc was built as:
LANG=C ./bin/g++ -v
Using built-in specs.
COLLECT_GCC=./bin/g++
COLLECT_LTO_WRAPPER=/home/slyfox/dev/git/gcc-native-quick-installed/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --enable-languages=c,c++ --disable-bootstrap
--with-multilib-list=m64
--prefix=/home/slyfox/dev/git/gcc-native-quick/../gcc-native-quick-installed
Thread model: posix
gcc version 8.0.0 20171112 (experimental) (GCC)
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Subject: [Bug c++/82953] ICE in tree_check() ../../gcc/gcc/tree.h:3087
Date: Sun, 12 Nov 2017 10:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82953
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
gdb backtrace:
(gdb) bt
#0 any_dependent_bases_p (type=type@entry=0x7ffff003f7e0) at
../../gcc/gcc/cp/search.c:2617
#1 0x000000000083ee53 in finish_class_member_access_expr (object=...,
name=<optimized out>, name@entry=0x7ffff003a780,
template_p=<optimized out>, complain=complain@entry=3) at
../../gcc/gcc/cp/typeck.c:2848
#2 0x0000000000733b99 in cp_parser_postfix_dot_deref_expression
(parser=parser@entry=0x7ffff0006688, token_type=CPP_DOT,
postfix_expression=..., for_offsetof=for_offsetof@entry=false,
idk=idk@entry=0x7fffffffc0a0, location=location@entry=28800)
at ../../gcc/gcc/cp/parser.c:7693
#3 0x0000000000740ddf in cp_parser_postfix_expression
(parser=parser@entry=0x7ffff0006688, address_p=<optimized out>,
cast_p=<optimized out>,
member_access_only_p=member_access_only_p@entry=false, decltype_p=<optimized
out>, pidk_return=<optimized out>)
at ../../gcc/gcc/cp/parser.c:7267
#4 0x000000000074472e in cp_parser_unary_expression
(parser=parser@entry=0x7ffff0006688, pidk=pidk@entry=0x0,
address_p=address_p@entry=false, cast_p=cast_p@entry=false,
decltype_p=decltype_p@entry=false) at ../../gcc/gcc/cp/parser.c:8363
#5 0x00000000007214ad in cp_parser_cast_expression
(parser=parser@entry=0x7ffff0006688, address_p=address_p@entry=false,
cast_p=cast_p@entry=false, decltype_p=decltype_p@entry=false, pidk=0x0) at
../../gcc/gcc/cp/parser.c:9131
#6 0x0000000000721d48 in cp_parser_binary_expression
(parser=parser@entry=0x7ffff0006688, cast_p=cast_p@entry=false,
no_toplevel_fold_p=no_toplevel_fold_p@entry=false,
decltype_p=decltype_p@entry=false, prec=prec@entry=PREC_NOT_OPERATOR, pidk=0x0)
at ../../gcc/gcc/cp/parser.c:9232
#7 0x0000000000723865 in cp_parser_assignment_expression
(parser=parser@entry=0x7ffff0006688, pidk=pidk@entry=0x0,
cast_p=cast_p@entry=false, decltype_p=decltype_p@entry=false) at
../../gcc/gcc/cp/parser.c:9519
#8 0x00000000007240d9 in cp_parser_expression
(parser=parser@entry=0x7ffff0006688, pidk=pidk@entry=0x0,
cast_p=cast_p@entry=false,
decltype_p=decltype_p@entry=false) at ../../gcc/gcc/cp/parser.c:9688
#9 0x00000000007262a9 in cp_parser_expression_statement
(parser=parser@entry=0x7ffff0006688,
in_statement_expr=in_statement_expr@entry=0x0)
at ../../gcc/gcc/cp/parser.c:11205
#10 0x000000000072d464 in cp_parser_statement
(parser=parser@entry=0x7ffff0006688,
in_statement_expr=in_statement_expr@entry=0x0,
in_compound=<optimized out>, in_compound@entry=true, if_p=if_p@entry=0x0,
chain=chain@entry=0x0,
loc_after_labels=loc_after_labels@entry=0x0) at
../../gcc/gcc/cp/parser.c:11021
#11 0x000000000072e671 in cp_parser_statement_seq_opt
(parser=parser@entry=0x7ffff0006688,
in_statement_expr=in_statement_expr@entry=0x0)
at ../../gcc/gcc/cp/parser.c:11348
#12 0x000000000072e748 in cp_parser_compound_statement
(parser=parser@entry=0x7ffff0006688,
in_statement_expr=in_statement_expr@entry=0x0,
bcs_flags=bcs_flags@entry=0, function_body=function_body@entry=true) at
../../gcc/gcc/cp/parser.c:11302
#13 0x0000000000748901 in cp_parser_function_body (in_function_try_block=false,
parser=0x7ffff0006688) at ../../gcc/gcc/cp/parser.c:21837
#14 cp_parser_ctor_initializer_opt_and_function_body
(parser=parser@entry=0x7ffff0006688,
in_function_try_block=in_function_try_block@entry=false) at
../../gcc/gcc/cp/parser.c:21874
#15 0x000000000074a33b in cp_parser_function_definition_after_declarator
(parser=parser@entry=0x7ffff0006688, inline_p=inline_p@entry=false)
at ../../gcc/gcc/cp/parser.c:26765
#16 0x000000000074b07e in
cp_parser_function_definition_from_specifiers_and_declarator
(declarator=<optimized out>, attributes=0x0,
decl_specifiers=0x7fffffffca10, parser=0x7ffff0006688) at
../../gcc/gcc/cp/parser.c:26681
#17 cp_parser_init_declarator (parser=parser@entry=0x7ffff0006688,
decl_specifiers=decl_specifiers@entry=0x7fffffffca10,
checks=checks@entry=0x0,
function_definition_allowed_p=function_definition_allowed_p@entry=true,
member_p=member_p@entry=false,
declares_class_or_enum=<optimized out>,
function_definition_p=0x7fffffffca0b, maybe_range_for_decl=0x0, init_loc=0x0,
auto_result=0x0)
at ../../gcc/gcc/cp/parser.c:19540
#18 0x000000000075114b in cp_parser_single_declaration
(parser=parser@entry=0x7ffff0006688, checks=checks@entry=0x0,
member_p=member_p@entry=false,
explicit_specialization_p=explicit_specialization_p@entry=false,
friend_p=friend_p@entry=0x7fffffffcaf7)
at ../../gcc/gcc/cp/parser.c:27221
#19 0x000000000075134d in cp_parser_template_declaration_after_parameters
(parser=parser@entry=0x7ffff0006688,
parameter_list=parameter_list@entry=0x7ffff00315a0,
member_p=member_p@entry=false) at ../../gcc/gcc/cp/parser.c:26823
#20 0x0000000000751d17 in cp_parser_explicit_template_declaration
(member_p=false, parser=0x7ffff0006688) at ../../gcc/gcc/cp/parser.c:27060
#21 cp_parser_template_declaration_after_export
(parser=parser@entry=0x7ffff0006688, member_p=<optimized out>)
at ../../gcc/gcc/cp/parser.c:27079
#22 0x0000000000752059 in cp_parser_template_declaration
(parser=parser@entry=0x7ffff0006688, member_p=member_p@entry=false)
at ../../gcc/gcc/cp/parser.c:15064
#23 0x000000000075827a in cp_parser_declaration
(parser=parser@entry=0x7ffff0006688) at ../../gcc/gcc/cp/parser.c:12788
#24 0x00000000007585ac in cp_parser_declaration_seq_opt
(parser=parser@entry=0x7ffff0006688) at ../../gcc/gcc/cp/parser.c:12715
#25 0x00000000007588cc in cp_parser_translation_unit (parser=0x7ffff0006688) at
../../gcc/gcc/cp/parser.c:4502
#26 c_parse_file () at ../../gcc/gcc/cp/parser.c:39021
#27 0x00000000008a1e37 in c_common_parse_file () at
../../gcc/gcc/c-family/c-opts.c:1127
#28 0x0000000000d9386e in compile_file () at ../../gcc/gcc/toplev.c:455
#29 0x00000000005cb4e7 in do_compile () at ../../gcc/gcc/toplev.c:2060
#30 toplev::main (this=this@entry=0x7fffffffcd56, argc=<optimized out>,
argc@entry=13, argv=<optimized out>, argv@entry=0x7fffffffce58)
at ../../gcc/gcc/toplev.c:2195
#31 0x00000000005cd97b in main (argc=13, argv=0x7fffffffce58) at
../../gcc/gcc/main.c:39
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82954] New: [8 regression] ICE in fold_binary_loc, at fold-const.c:9061
Date: Sun, 12 Nov 2017 13:03:00 -0000
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Bug ID: 82954
Summary: [8 regression] ICE in fold_binary_loc, at
fold-const.c:9061
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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CC: jakub at gcc dot gnu.org
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trippels@gcc67 ~ % cat stun.ii
struct A {
struct {
int __u6_addr8;
} __in6_u;
};
struct B {
B(A &);
};
unsigned a[0];
struct C {
B m_fn1() const;
};
B C::m_fn1() const {
A b;
unsigned *c = reinterpret_cast<unsigned *>(b.__in6_u.__u6_addr8);
c[0] = c[0] ^ 1;
c[1] = c[1] ^ 1;
c[2] = c[2] ^ a[0];
c[3] = c[3] ^ a[1];
return b;
}
trippels@gcc67 ~ % g++ -O2 -c stun.ii
during GIMPLE pass: store-merging
stun.ii: In member function ‘B C::m_fn1() const’:
stun.ii:13:3: internal compiler error: in fold_binary_loc, at fold-const.c:9061
B C::m_fn1() const {
^
0xa96e20 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/gcc/fold-const.c:9058
0xa9d9da fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/gcc/fold-const.c:12114
0x1524096 output_merged_store
../../gcc/gcc/gimple-ssa-store-merging.c:1873
0x1525d24 output_merged_stores
../../gcc/gcc/gimple-ssa-store-merging.c:2066
0x1525d24 terminate_and_process_chain
../../gcc/gcc/gimple-ssa-store-merging.c:2104
0x1525d24 terminate_and_release_chain
../../gcc/gcc/gimple-ssa-store-merging.c:996
0x1526234 terminate_all_aliasing_chains
../../gcc/gcc/gimple-ssa-store-merging.c:979
0x152684c process_store
../../gcc/gcc/gimple-ssa-store-merging.c:2403
0x152684c execute
../../gcc/gcc/gimple-ssa-store-merging.c:2511
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Subject: [Bug fortran/53478] gfortran segfaults when module name clashes with C binding name of procedure
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |dominiq at lps dot ens.fr
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Patch submitted at https://gcc.gnu.org/ml/fortran/2017-11/msg00067.html.
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Subject: [Bug tree-optimization/82954] [8 regression] ICE in fold_binary_loc, at fold-const.c:9061
Date: Sun, 12 Nov 2017 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82954
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-12
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Target Milestone|--- |8.0
Ever confirmed|0 |1
>From gcc-bugs-return-581543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 14:41:51 2017
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Subject: [Bug tree-optimization/82954] [8 regression] ICE in fold_binary_loc, at fold-const.c:9061
Date: Sun, 12 Nov 2017 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82954
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42589
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42589&action=edit
gcc8-pr82954.patch
Untested fix.
>From gcc-bugs-return-581544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 15:16:12 2017
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From: "mingw.android at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82955] New: ICE when using -fdump-passes -fdisable-tree-einline
Date: Sun, 12 Nov 2017 15:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82955
Bug ID: 82955
Summary: ICE when using -fdump-passes -fdisable-tree-einline
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mingw.android at gmail dot com
Target Milestone: ---
Tested on ArchLinux's GCC 7.2.0 and also the Anaconda Distribution's
gxx_linux-64 (also 7.2.0), reproducer is:
echo "" | g++ -fdump-passes -fdisable-tree-einline -c -x c++ -
ipa-opt_local_passes : ON
tree-fixup_cfg3 : ON
*rebuild_cgraph_edges : ON
tree-inline_param1 : ON
g++: internal compiler error: Segmentation fault (program cc1plus)
Another reproducer with a different message is:
echo "" | gcc -fdump-passes -fdisable-tree-einline -c -x c -
ipa-opt_local_passes : ON
tree-fixup_cfg3 : ON
*rebuild_cgraph_edges : ON
tree-inline_param1 : ON
Internal compiler error: Error reporting routines re-entered.
>From gcc-bugs-return-581545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 15:22:32 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I cannot reproduce at r254648. How do you configure?
>From gcc-bugs-return-581546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 15:27:56 2017
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Subject: [Bug fortran/82937] [F03] associate non-standard bounds are lost for associating entity
Date: Sun, 12 Nov 2017 15:27:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |pault at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> AFAIK the lower bounds of array slices are always 1:
>
> write(*,"(A,2('(',I2,',',I2,')'))") "arr(1,1,:,:) bounds are
> ",lbound(arr(1,1,:,:),1),&
> & ubound(arr(1,1,:,:),1),&
> & lbound(arr(1,1,:,:),2),ubound(arr(1,1,:,:),2)
>
> arr(1,1,:,:) bounds are ( 1, 7)( 1,10)
>
> So I am inclined to consider that
>
> myarr bounds are ( 1, 7)( 1,10)
>
> is correct and also the error with -fcheck=bounds. IMO this PR is INVALID.
>
> If you disagree, you may ask the question on comp.lang.fortran.
See the first posting from spectrum on
https://groups.google.com/forum/#!topic/comp.lang.fortran/QbMFCNP_DuY
The conclusion of this long thread was that Dominique's interpretation above is
correct and that gfortran was changed accordingly.
Closing as INVALID.
Best regards
Paul
>From gcc-bugs-return-581547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 16:31:33 2017
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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Sun, 12 Nov 2017 16:31:00 -0000
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--- Comment #14 from Jan Hubicka <hubicka at ucw dot cz> ---
> I cannot reproduce at r254648. How do you configure?
I think it went away with the finish of counts conversion - the scenario
trigerring the issue
is very specific. I know what happens, but I am on a road right now. I will
write it once
reaching Czech Republic and wifi.
Honza
>From gcc-bugs-return-581548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 17:09:43 2017
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Subject: [Bug tree-optimization/82956] New: Incorrect relocation emitted (symbol considered external) due to inlining and hidden visibility.
Date: Sun, 12 Nov 2017 17:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82956
Bug ID: 82956
Summary: Incorrect relocation emitted (symbol considered
external) due to inlining and hidden visibility.
Product: gcc
Version: 7.2.0
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Created attachment 42590
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42590&action=edit
testcase.cc
I'm not really sure where the fault is here, but I am trying to compile MySQL
with -O -fPIC -fvisibility-inlines-hidden and am running into a failure to
link:
> /opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/bin/x86_64-conda_cos6-linux-gnu-c++ -fPIC -fvisibility-inlines-hidden -std=gnu++98 -fmessage-length=0 -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O2 -pipe -fno-strict-aliasing -Wall -Wextra -Wformat-security -Wvla -Woverloaded-virtual -Wno-unused-parameter -O3 -DNDEBUG -DDBUG_OFF -fPIC -Wl,-O2 -Wl,--sort-common -Wl,--as-needed -Wl,-z,relro -Wl,-z,now -Wl,-rpath,/opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib -shared -o group_replication.so CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/pax_msg.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_base.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_memory.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_vp_str.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_cfg.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_cache.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_transport.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/node_address.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_msg_queue.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_statistics.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/app_data.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/site_def.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_ssl_transport.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_recover.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/task.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/bitset.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/simset.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/node_set.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_interface.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/node_list.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/task_debug.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/sock_probe.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/task_net.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/synode_no.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/xcom/xcom_detector.c.o CMakeFiles/group_replication.dir/xdr_gen/xcom_vp_xdr.c.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_logging.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/xplatform/my_xp_cond.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/xplatform/my_xp_thread.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/xplatform/my_xp_mutex.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/xplatform/my_xp_util.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_view.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_types.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_message.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_member_identifier.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/interface/gcs_group_identifier.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/gcs_interface_factory.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_communication_interface.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_control_interface.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_group_management.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_internal_message.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_networking.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_utils.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_state_exchange.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_group_member_information.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_message_stages.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_view_identifier.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_interface.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_notification.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_message_stage_lz4.cc.o CMakeFiles/group_replication.dir/libmysqlgcs/src/bindings/xcom/gcs_xcom_statistics_interface.cc.o CMakeFiles/group_replication.dir/src/applier.cc.o CMakeFiles/group_replication.dir/src/auto_increment.cc.o CMakeFiles/group_replication.dir/src/certifier.cc.o CMakeFiles/group_replication.dir/src/channel_observation_manager.cc.o CMakeFiles/group_replication.dir/src/delayed_plugin_initialization.cc.o CMakeFiles/group_replication.dir/src/gcs_event_handlers.cc.o CMakeFiles/group_replication.dir/src/gcs_logger.cc.o CMakeFiles/group_replication.dir/src/gcs_operations.cc.o CMakeFiles/group_replication.dir/src/gcs_plugin_messages.cc.o 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CMakeFiles/group_replication.dir/src/sql_service/sql_service_interface.cc.o CMakeFiles/group_replication.dir/src/sql_service/sql_command_test.cc.o CMakeFiles/group_replication.dir/src/sql_service/sql_service_command.cc.o -Wl,-rpath,/opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib: -lpthread ../../../libservices/libmysqlservices.a ../../../extra/liblz4_lib.a /opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/libssl.so /opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/libcrypto.so -ldl -lpthread
> /opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/bin/../lib/gcc/x86_64-conda_cos6-linux-gnu/7.2.0/../../../../x86_64-conda_cos6-linux-gnu/bin/ld: CMakeFiles/group_replication.dir/src/observer_trans.cc.o: relocation R_X86_64_PC32 against undefined symbol `_ZThn120_N14Gtid_log_event13get_data_sizeEv' can not be used when making a shared object; recompile with -fPIC
> /opt/conda/conda-bld/mysql_1510280026509/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/bin/../lib/gcc/x86_64-conda_cos6-linux-gnu/7.2.0/../../../../x86_64-conda_cos6-linux-gnu/bin/ld: final link failed: Bad value
I am compiling observer_trans.cc with -fPIC, so the advice is not helpful.
I believe Gtid_log_event::get_data_size() got inlined when it should not and
after that, the local reference was considered external and an incorrect
relocation got emitted (or something along those lines).
I used creduce to minimize a testcase (testcase.cc) which I think demonstrates
the problem. Compiling this and inspecting the relocations via:
> g++ -O -fvisibility-inlines-hidden -fPIC -finline -c testcase.cc
> objdump -r testcase.o | grep _ZThn120_N14Gtid_log_event13get_data_sizeEv
.. gives:
> 000000000000003c R_X86_64_PC32 _ZThn120_N14Gtid_log_event13get_data_sizeEv-0x0000000000000004
> 0000000000000038 R_X86_64_64 _ZThn120_N14Gtid_log_event13get_data_sizeEv
I can work around this by not passing -fvisibility-inlines-hidden but I would
prefer not to (note that I have not declared anything as inline in the testcase
so it cannot the case that I have some broken inline specifiers around).
>From gcc-bugs-return-581549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 17:36:27 2017
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Subject: [Bug fortran/53298] ICE in gfc_conv_scalarized_array_ref for ARRAY + substring
Date: Sun, 12 Nov 2017 17:36:00 -0000
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Paul, is this something that could be fixed with the
new descriptor you introduced?
>From gcc-bugs-return-581550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 17:44:33 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/77517] ICE in conv_intrinsic_move_alloc, at fortran/trans-intrinsic.c:9517
Date: Sun, 12 Nov 2017 17:44:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The ICEs have been replaced with the error
Error: 'from' argument of 'move_alloc' intrinsic at (1) must be the same type
and kind as 'to'
between revisions r254498 and r254660, except for the test in comment 1.
>From gcc-bugs-return-581551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 19:10:25 2017
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Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
Date: Sun, 12 Nov 2017 19:10:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I've now submitted the patch upstream: https://reviews.llvm.org/D39888.
This patch allowed to bootstrap gcc on darwin10, but running the test suite
gave me ~2500 asan failures (gcc/g++, -m32/-m64) of the kind
dyld: Symbol not found: _strndup
Referenced from: /opt/gcc/gcc8w/lib/libasan.5.dylib
Expected in: flat namespace
in /opt/gcc/gcc8w/lib/libasan.5.dylib
Trace/BPT trap
>From gcc-bugs-return-581552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 19:29:19 2017
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Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
Date: Sun, 12 Nov 2017 19:29:00 -0000
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--- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>> I've now submitted the patch upstream: https://reviews.llvm.org/D39888.
>
> This patch allowed to bootstrap gcc on darwin10, but running the test suite
> gave me ~2500 asan failures (gcc/g++, -m32/-m64) of the kind
>
> dyld: Symbol not found: _strndup
> Referenced from: /opt/gcc/gcc8w/lib/libasan.5.dylib
> Expected in: flat namespace
> in /opt/gcc/gcc8w/lib/libasan.5.dylib
> Trace/BPT trap
It seems there's no point in trying: compiler-rt's cmake/config-ix.cmake
requires Mac OS X 10.7/Darwin 11 and up for the sanitizers. I guess all
we can do is disable them (or perhaps only asan) in the gcc tree
(libsanitizer/configure.tgt).
Rainer
>From gcc-bugs-return-581553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 12 21:53:30 2017
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Subject: [Bug ipa/82957] New: internal compiler error: in to_cgraph_frequency, at profile-count.c:251
Date: Sun, 12 Nov 2017 21:53:00 -0000
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Bug ID: 82957
Summary: internal compiler error: in to_cgraph_frequency, at
profile-count.c:251
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Building compiler-rt (LLVM libs) with GCC trunk (rev 254666, x86_64) I get this
error.
Here's reduced test case:
> cat cfi.i
namespace a {
typedef long b;
void c() { __builtin_trap(); }
}
using namespace a;
namespace d {
class e {
public:
bool f();
};
__attribute__((always_inline)) void g(b, void *, void *) {
e h;
if (h.f())
c();
}
}
using namespace d;
void i() { g(0, 0, 0); }
sctpiel1:/users/dybaboki/llvm/build-trunk-20171112_temp/projects/compiler-rt/lib/cfi>
g++ -std=c++11 -O2 cfi.i -c -m32
cfi.i:11:37: warning: always_inline function might not be inlinable
[-Wattributes]
__attribute__((always_inline)) void g(b, void *, void *) {
^
during GIMPLE pass: einline
cfi.i: In function ‘void i()’:
cfi.i:18:24: internal compiler error: in to_cgraph_frequency, at
profile-count.c:251
void i() { g(0, 0, 0); }
^
0xde7859 profile_count::to_cgraph_frequency(profile_count) const
../../gcc/gcc/profile-count.c:251
0xcb2cd7 cgraph_edge::frequency()
../../gcc/gcc/cgraph.h:3118
0xcb2cd7 estimate_edge_size_and_time
../../gcc/gcc/ipa-fnsummary.c:2581
0xcb2cd7 estimate_calls_size_and_time
../../gcc/gcc/ipa-fnsummary.c:2620
0xcb2ed6 estimate_calls_size_and_time
../../gcc/gcc/ipa-fnsummary.c:2627
0xcb3625 ipa_update_overall_fn_summary(cgraph_node*)
../../gcc/gcc/ipa-fnsummary.c:3114
0x6fb64e early_inline_small_functions
../../gcc/gcc/ipa-inline.c:2636
0x6fb64e early_inliner(function*)
../../gcc/gcc/ipa-inline.c:2730
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-581554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 01:11:39 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
Date: Mon, 13 Nov 2017 01:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82946
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sat, 11 Nov 2017, msebor at gcc dot gnu.org wrote:
> other string literal) cannot be a valid representation of a pointer. (The only
> way for a conforming program to obtain a valid pointer is by assigning to it
> the value of another valid pointer. Even if the bit pattern of the literal
> "123" happened to match a valid address in a program, copying the literal into
> a pointer and then using that pointer is undefined.)
Well, GCC should support bare-metal programs that construct a valid
pointer by casting an integer known to be the address of something, e.g.
*(volatile int *)0xSOMETHING = VALUE; (where 0xSOMETHING is known to be
e.g. a memory-mapped I/O address on that particular board). That sort of
thing should not be considered undefined in C as used in practice, at
least as long as pointers to the object in question are only constructed
from integers (rather than accessing the same object both by conversion
from integer, and by having a linker script to give it a name).
>From gcc-bugs-return-581555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 03:18:37 2017
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Subject: [Bug middle-end/82958] New: uninitialized used warning missed when variable is both in function argument and return value within a loop
Date: Mon, 13 Nov 2017 03:18:00 -0000
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Bug ID: 82958
Summary: uninitialized used warning missed when variable is
both in function argument and return value within a
loop
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 42591
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42591&action=edit
test case
flags: -Wall -Wextra -Wpedantic
Try with and without -DBUG.
>From gcc-bugs-return-581556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 06:55:36 2017
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
Date: Mon, 13 Nov 2017 06:55:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Happens a lot with QT code:
qt5/QtCore/qstring.h:
174 #define QStringLiteral(str) \
175 ([]() Q_DECL_NOEXCEPT -> QString { \
176 enum { Size = sizeof(QT_UNICODE_LITERAL(str))/2 - 1 }; \
177 static const QStaticStringData<Size> qstring_literal = { \
178 Q_STATIC_STRING_DATA_HEADER_INITIALIZER(Size), \
179 QT_UNICODE_LITERAL(str) }; \
180 QStringDataPtr holder = { qstring_literal.data_ptr() }; \
181 const QString qstring_literal_temp(holder); \
182 return qstring_literal_temp; \
183 }()) \
184 /**/
185
>From gcc-bugs-return-581557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 08:29:03 2017
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Subject: [Bug ipa/82957] [8 Regression] ICE: in to_cgraph_frequency, at profile-count.c:251
Date: Mon, 13 Nov 2017 08:29:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-13
CC| |hubicka at ucw dot cz,
| |trippels at gcc dot gnu.org
Summary|internal compiler error: in |[8 Regression] ICE: in
|to_cgraph_frequency, at |to_cgraph_frequency, at
|profile-count.c:251 |profile-count.c:251
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Probably started with r254379.
>From gcc-bugs-return-581558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 08:37:53 2017
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Mon, 13 Nov 2017 08:37:00 -0000
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--- Comment #12 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
char *strncpy(char *dest, const char *src, size_t n);
void foo(char* p)
{
strncpy(p, "1", 1);
p[1] = 0;
}
with gcc8/r254663 is this expected?
$ gcc -c -Wall x.c
x.c: In function ‘foo’:
x.c:4:5: warning: ‘strncpy’ output truncated before terminating nul copying 1
byte from a string of the same length [-Wstringop-truncation]
strncpy(p, "1", 1);
^~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-581559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:02:06 2017
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Subject: [Bug tree-optimization/82954] [8 regression] ICE in fold_binary_loc, at fold-const.c:9061
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 13 09:01:24 2017
New Revision: 254671
URL: https://gcc.gnu.org/viewcvs?rev=254671&root=gcc&view=rev
Log:
PR tree-optimization/82954
* gimple-ssa-store-merging.c
(imm_store_chain_info::coalesce_immediate_stores): If
!infof->ops[N].base_addr, split group if info->ops[N].base_addr.
* gcc.c-torture/execute/pr82954.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr82954.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:03:00 2017
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-13
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, GCC 4.2 as host compiler and using non-standard flags (-Os). Can you try
with standard flags? It's probably miscompiling libcpp and/or genmatch.
>From gcc-bugs-return-581561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:04:30 2017
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Subject: [Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc
Date: Mon, 13 Nov 2017 09:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |powerpc
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note GCC 5 is no longer supported, you might want to try GCC 7.
>From gcc-bugs-return-581562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:05:40 2017
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Subject: [Bug c++/82959] New: g++ doesn't appreciate C++17 evaluation order rules for overloaded operators
Date: Mon, 13 Nov 2017 09:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82959
Bug ID: 82959
Summary: g++ doesn't appreciate C++17 evaluation order rules
for overloaded operators
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ixsci at yandex dot ru
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Having the following code:
#include <iostream>
using namespace std;
class Int
{
public:
Int() = default;
Int(int val):
m_Value{val}
{
}
Int operator++(int)
{
Int tmp{*this};
++m_Value;
return tmp;
}
bool operator&&(const Int& rhs) const
{
return m_Value && rhs.m_Value;
}
private:
int m_Value = 0;
};
template <typename T>
bool cleverFun(T& value)
{
return (cout << "first\n", value++) &&
(cout << "second\n", value++);
}
int main()
{
int i = 0;
Int complexI{};
cout << "==========SIMPLE INT============\n";
cleverFun(i);
cout << "==========COMPLEX INT============\n";
cleverFun(complexI);
};
The conforming C++17 compiler (to my knowledge) should output "first" then
"second" twice, but GCC outputs "second" then "first" with the overloaded &&
operator.
>From gcc-bugs-return-581563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:08:08 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
Date: Mon, 13 Nov 2017 09:08:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #0)
> In the program below, while GCC optimizes the strlen call in f() to a
> constant it doesn't do the same for the equivalent function g().
>
> I suspect this is caused by the same underlying assumptions as pr80944:
> i.e., that the strcpy (a->d, "123") call could change a->d if a->d pointed
> at or into itself. While that might be true in other circumstances, it's
> not possible here. Since the array at a->d is subsequently accessed by the
> call to strlen, the strcpy call cannot change a->d in a valid program
> because "123" (or any other string literal) cannot be a valid representation
> of a pointer. (The only way for a conforming program to obtain a valid
> pointer is by assigning to it the value of another valid pointer. Even if
> the bit pattern of the literal "123" happened to match a valid address in a
> program, copying the literal into a pointer and then using that pointer is
> undefined.)
>
> So a->d can be assumed not to change in either function and the strlen
> optimization below is safe in both.
>
> $ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout a.c
>
> char* strcpy (char*, const char*);
> __SIZE_TYPE__ strlen (const char*);
>
> struct A { char *d; };
>
> unsigned f (struct A *a)
> {
> char *d = a->d;
> strcpy (d, "123");
> return strlen (d); // folded into 3
> }
>
> unsigned g (struct A *a)
> {
> strcpy (a->d, "123");
> return strlen (a->d); // not folded but can be
> }
>
>
> ;; Function f (f, funcdef_no=0, decl_uid=1898, cgraph_uid=0, symbol_order=0)
>
> f (struct A * a)
> {
> char * d;
>
> <bb 2> [local count: 10000]:
> d_4 = a_3(D)->d;
> __builtin_memcpy (d_4, "123", 4);
> return 3;
>
> }
>
>
>
> ;; Function g (g, funcdef_no=1, decl_uid=1902, cgraph_uid=1, symbol_order=1)
>
> g (struct A * a)
> {
> char * _1;
> char * _2;
> long unsigned int _3;
> unsigned int _7;
>
> <bb 2> [local count: 10000]:
> _1 = a_5(D)->d;
> __builtin_memcpy (_1, "123", 4);
> _2 = a_5(D)->d;
Clearly because GCC has to assume a_5(D)->d points to itself and thus
memcpy clobbering it.
Can't see how you can rule that out for a valid program. Thus - INVALID?
Richard.
> _3 = strlen (_2);
> _7 = (unsigned int) _3;
> return _7;
>
> }
>From gcc-bugs-return-581564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:08:21 2017
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Subject: [Bug bootstrap/82948] [8 Regression] prefix.c:202:15: error: 'char* strncpy(char*, const char*, size_t)' destination unchanged after copying no bytes [-Werror=stringop-truncation]
Date: Mon, 13 Nov 2017 09:08:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-581565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:10:32 2017
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Subject: [Bug c++/82949] internal compiler error: in cp_parser_late_return_type_opt, at cp/parser.c:16698
Date: Mon, 13 Nov 2017 09:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |4.7.3
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 4.7.2 is long out of maintainance, please try GCC 6 or newer. Note this
was fixed in 4.7.3.
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Subject: [Bug tree-optimization/82950] possible strlen optimization for memcmp/strcmp of arrays
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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> ---
Confirmed.
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Subject: [Bug testsuite/82951] gcc.c-torture/execute/20040409-1.c undefined behavior
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, on RTL signs do not matter. I'd say strip the bogus cases from the
existing tests and "duplicate" them into new variants using -fwrapv? Thus only
apply -fwrapv to those cases that need it.
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Subject: [Bug c++/82959] g++ doesn't appreciate C++17 evaluation order rules for overloaded operators
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--- Comment #1 from Evgeniy Shcherbina <ixsci at yandex dot ru> ---
Not that it matters much, but it should be "int i = -1;" in the code to match
my description fully.
>From gcc-bugs-return-581569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:25:39 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82960] New: spu_machine_dependent_reorg does not handle jump_table_data insn
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Bug ID: 82960
Summary: spu_machine_dependent_reorg does not handle
jump_table_data insn
Product: gcc
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When building spu with --enable-checking=yes,rtl, I run into:
...
0xf965db rtl_check_failed_type2(rtx_def const*, int, int, int, char const*,
int, char const*)
src/gcc/rtl.c:820
0x14b6cca pad_bb
src/gcc/config/spu/spu.c:2032
0x14b9d8b spu_machine_dependent_reorg
src/gcc/config/spu/spu.c:2640
0xf83d92 execute
src/gcc/reorg.c:3947
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.
...
In pad_bb, we loop over the insns using active_insn_p and next_active_insn, but
do not handle the jump_table_data insn.
>From gcc-bugs-return-581571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:30:53 2017
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Subject: [Bug tree-optimization/82954] [8 regression] ICE in fold_binary_loc, at fold-const.c:9061
Date: Mon, 13 Nov 2017 09:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:30:03 2017
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Subject: [Bug c++/82952] Hang compiling with g++ -fsanitize=undefined -Wduplicated-branches
Date: Mon, 13 Nov 2017 09:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |compile-time-hog
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I suspect UBSAN creates a large number of branches and
-Wduplicated-branches isn't very effective. In fact it looks quadratic given
we do
128 if (warn_duplicated_branches)
129 walk_tree_without_duplicates (&DECL_SAVED_TREE (fndecl),
130 do_warn_duplicated_branches_r, NULL);
and do_warn_duplicated_branches_r does itself
/* Compute the hash of the then branch. */
inchash::hash hstate0 (0);
inchash::add_expr (thenb, hstate0);
hashval_t h0 = hstate0.end ();
...
&& !walk_tree_without_duplicates (&thenb, expr_from_macro_expansion_r,
NULL)
thus we process each tree (in COND_EXPRs) a quadratic amount of times.
inchash is very likely also not avoiding walking duplicates multiple times,
as SAVE_EXPR is tcc_expression it even walks those multiple times.
As a band-aid I suggest to limit the depth we walk here somehow...
>From gcc-bugs-return-581572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:31:43 2017
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Subject: [Bug driver/82955] ICE when using -fdump-passes -fdisable-tree-einline
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fdump-passes is somewhat of a hack and appearantly doesn't mix well with
-fdisable-*
>From gcc-bugs-return-581573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:32:17 2017
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Subject: [Bug ipa/82957] [8 Regression] ICE: in to_cgraph_frequency, at profile-count.c:251
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>From gcc-bugs-return-581574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:43:02 2017
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Subject: [Bug fortran/78990] [6/7/8 Regression] ICE when assigning polymorphic array function result
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
I have a patch for this that I will post on the fortran list just as soon as it
has finished regtesting.
This turned out to be quite a challenging debugging job as often seems to be
the case where the scalarizer is involved. Ultimately, I found that the
testcase compiled when return_t1 was made a pointer and the resulting code
revealed where the problems lay. This modified testcase now works as well but,
of course, it leaks memory.
Thanks for the report by the way.
Paul
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #15 from Jan Hubicka <hubicka at ucw dot cz> ---
Hello,
here is what happens. There is problematic block BB 36
;; basic block 36, loop depth 0, count 34157, maybe hot
;; prev block 35, next block 37, flags: (HOT_PARTITION, RTL, MODIFIED)
;; pred: 33 [66.0% (guessed)] count:0 (CROSSING)
;; 35 [60.9%] count:34157 (FALLTHRU)
;; bb 36 artificial_defs: { }
;; bb 36 artificial_uses: { u-1(6){ }u-1(7){ }}
;; lr in 3 [bx] 4 [si] 6 [bp] 7 [sp] 20 [frame]
;; lr use 4 [si] 6 [bp] 7 [sp]
;; lr def 0 [ax] 5 [di] 17 [flags]
;; live in 3 [bx] 4 [si] 6 [bp] 7 [sp] 20 [frame]
;; live gen 0 [ax] 5 [di] 17 [flags]
;; live kill 17 [flags]
(code_label 302 298 303 36 296 (nil) [1 uses])
(note 303 302 305 36 [bb 36] NOTE_INSN_BASIC_BLOCK)
(insn 305 303 306 36 (set (reg/f:SI 0 ax [orig:870 _71->typed.type ] [870])
(mem/f/j:SI (plus:SI (reg/f:SI 4 si [orig:114 _71 ] [114])
(const_int 8 [0x8])) [0 _71->typed.type+0 S4 A32]))
"../../gcc/tree-ssa-strlen.c":2727 75 {*movsi_internal}
(nil))
(insn 306 305 8625 36 (set (reg:HI 5 di [orig:872 _7->base.code ] [872])
(mem/j:HI (reg/f:SI 0 ax [orig:870 _71->typed.type ] [870]) [0
_7->base.code+0 S2 A32])) "../../gcc/tree-ssa-strlen.c":2727 76
{*movhi_internal}
(nil))
(insn 8625 306 308 36 (parallel [
(set (reg:SI 5 di [871])
(plus:SI (reg:SI 5 di [orig:872 _7->base.code ] [872])
(const_int -10 [0xfffffffffffffff6])))
(clobber (reg:CC 17 flags))
]) "../../gcc/tree-ssa-strlen.c":2727 190 {*addsi_1}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
(insn 308 8625 309 36 (set (reg:CC 17 flags)
(compare:CC (reg:HI 5 di [871])
(const_int 1 [0x1]))) "../../gcc/tree-ssa-strlen.c":2727 6
{*cmphi_1}
(expr_list:REG_DEAD (reg:HI 0 ax [871])
(nil)))
(jump_insn 309 308 310 36 (set (pc)
(if_then_else (gtu (reg:CC 17 flags)
(const_int 0 [0]))
(label_ref:SI 343)
(pc))) "../../gcc/tree-ssa-strlen.c":2727 536 {*jcc}
Now see it has two predecesors - one cold (count 0), BB 33 and one hot (BB 35)A
Now BB 35 gets visited in trace 3 which is 31->32->35
BB 36 gets trace 9 (it is alone there)
BB 33 gets trace 266
So we get
Trace 3 (round 1): 31 [554] 32 [554] 35 [554]
Trace 9 (round 2): 36 [337]
Trace 266 (round 4): 33 [0] 34 [0]
Now while connecting traces we get
Connection: 912 819
Here it is processing trace 3
Connection: 45 31
Connection: 41 45
Connection: 37 38
Connection: 36 37
Here trace 9 gets used
Connection: 35 36
changing bb of uid 8944
unscanned insn
changing bb of uid 8939
unscanned insn
scanning new insn with uid = 8939.
changing bb of uid 8940
unscanned insn
scanning new insn with uid = 8940.
changing bb of uid 8941
unscanned insn
scanning new insn with uid = 8941.
changing bb of uid 8942
unscanned insn
scanning new insn with uid = 8942.
changing bb of uid 8943
unscanned insn
scanning new insn with uid = 8943.
Redirecting fallthru edge 35->36 to 913
Duplicated bb 36 (created bb 913)
So BB 36 gets duplicated to be placed just after Trace 3.
>From this moment BB 36 has only one cold predecestor and that is why fixup
eventually turns it cold.
The duplication happens because BB 36 is already attached to begining of the
same trace so
we are duplicating tail of the loop.
This seems reasonable things to do. Only what BB reorder misses is that it may
do the partitining
fixup after the duplication. I am not sure if that is desirable as that would
affect existing
trace that may need to be updated, too.
So still it seems reasonable to me to disable the partition fixup post
bb-reorder because
it only may trigger ICE if it suceeds so it is a waste of compile time. We may
teach bb reorder
to be bit smarter here, but it seems quite rare scenario.
>From gcc-bugs-return-581576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 09:54:35 2017
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Subject: [Bug target/82960] spu_machine_dependent_reorg does not handle jump_table_data insn
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42592
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42592&action=edit
Tentative patch
Using this tentative patch, I manage to finish the build.
>From gcc-bugs-return-581577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 10:07:01 2017
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Subject: [Bug c++/82952] Hang compiling with g++ -fsanitize=undefined -Wduplicated-branches
Date: Mon, 13 Nov 2017 10:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, indeed. I'd say in this case the biggest problem is probably repeated
traversal of SAVE_EXPRs in inchash::add_expr (which BTW doesn't seem to be
something that operand_equal_p with OEP_LEXICOGRAPHICS handles).
But generally you're right, even without SAVE_EXPRs with hundreds of nested
COND_EXPRs the compile time complexity isn't tollerable either.
So, shall we before those
/* Compute the hash of the then branch. */
inchash::hash hstate0 (0);
inchash::add_expr (thenb, hstate0);
hashval_t h0 = hstate0.end ();
/* Compute the hash of the else branch. */
inchash::hash hstate1 (0);
inchash::add_expr (elseb, hstate1);
hashval_t h1 = hstate1.end ();
walk thenb as well as elseb and count trees we've walked (and punt if seen more
than some constant or PARAM trees)? That could also punt if both numbers of
trees are below the limit, but different (though inchash::add_expr as well as
opernad_equal_p has some spots with STRIP_NOPS, which we'd no longer then
recognize if different).
And/or add some optional hash table for remembering SAVE_EXPRs? Though, I'd
prefer not to slow down the normal add_expr...
Shall we handle SAVE_EXPR in operand_equal_p if OEP_LEXICOGRAPHICS?
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 13 Nov 2017 10:26:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 13 10:26:13 2017
New Revision: 254679
URL: https://gcc.gnu.org/viewcvs?rev=254679&root=gcc&view=rev
Log:
PR tree-optimization/78821
* gimple-ssa-store-merging.c (compatible_load_p): Don't require
that bit_not_p is the same.
(imm_store_chain_info::coalesce_immediate_stores): Likewise.
(split_group): Count precisely bit_not_p bits in each statement.
(invert_op): New function.
(imm_store_chain_info::output_merged_store): Use invert_op to
emit BIT_XOR_EXPR with a xor_mask instead of BIT_NOT_EXPR if some
but not all orig_stores have BIT_NOT_EXPR in the corresponding spots.
* gcc.dg/store_merging_15.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/store_merging_15.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 10:43:19 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Mon, 13 Nov 2017 10:43:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #16 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> So BB 36 gets duplicated to be placed just after Trace 3.
> From this moment BB 36 has only one cold predecestor and that is why fixup
> eventually turns it cold.
OK, exactly the same sequence of events as:
https://gcc.gnu.org/ml/gcc-patches/2017-10/msg02006.html
> This seems reasonable things to do. Only what BB reorder misses is that it
> may do the partitining fixup after the duplication. I am not sure if that is
> desirable as that would affect existing trace that may need to be updated, too.
The result is suboptimal though, since you end up with a (cold) block in the
hot partition whose only predecessors are in the cold partition. What happens
in this case if copy_bb_p returns false for the problematic block, i.e. if you
move the test I added lines 579-584 into the copy_bb_p predicate itself? Does
this result in a better reordered sequence of blocks?
>From gcc-bugs-return-581580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 11:52:56 2017
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Subject: [Bug target/82961] New: ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Mon, 13 Nov 2017 11:52:00 -0000
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Bug ID: 82961
Summary: ICE in dwarf2out.c: deferred_asm_name != NULL
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When building for alpha-dec-vms, I run into this ICEs in libgcc:
...
make[2]: *** [_negdi2.o] Error 1
make[2]: *** [_ashldi3.o] Error 1
make[2]: *** [_lshrdi3.o] Error 1
make[2]: *** [_muldi3.o] Error 1
make[4]: *** [_muldi3.o] Error 1
make[4]: *** [_negdi2.o] Error 1
make[4]: *** [_ashrdi3.o] Error 1
make[4]: *** [_ashldi3.o] Error 1
make[4]: *** [_lshrdi3.o] Error 1
...
In more detail, the _lshrdi3.o one:
...
0xa64e1b dwarf2out_finish
src/gcc/dwarf2out.c:29826
0x1476ede vmsdbgout_finish
src/gcc/vmsdbgout.c:1569
0xa64e1b dwarf2out_finish
src/gcc/dwarf2out.c:29826
0x1476ede vmsdbgout_finish
/home/vries/gcc_versions/devel/src/gcc/vmsdbgout.c:1569
Please submit a full bug report,
...
The assert that triggers is:
...
29826 gcc_assert (deferred_asm_name == NULL);
...
The deferred_asm_name is for __clz_tab:
...
(gdb) call debug_generic_expr (deferred_asm_name.created_for )
__clz_tab
...
>From gcc-bugs-return-581581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 11:55:31 2017
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |alpha-dec-vms
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Configure line:
...
$ configure --enable-checking=yes,rtl --enable-languages=c --disable-tls
--disable-threads --target=alpha-dec-vms
...
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/82962] New: valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
Date: Mon, 13 Nov 2017 12:04:00 -0000
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Bug ID: 82962
Summary: valgrind reports "Conditional jump or move depends on
uninitialised value" in EXECUTE_COMMAND_LINE
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Test case:
integer :: istat
! istat = 0
call execute_command_line('echo "Hello World!"', exitstat=istat)
end
After compiling this with gfortran, and running the resulting executable
through valgrind, I get:
==16313== Conditional jump or move depends on uninitialised value(s)
==16313== at 0x4F3B7EA: _gfortran_execute_command_line_i4 (in
/usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0)
This only occurs if an EXITSTAT argument is passed, which is not initialized
before the call. However, EXITSTAT is supposed to be an output argument AFAIK.
I don't see why its value should be used at all inside of EXECUTE_COMMAND_LINE?
A dump of the program shows:
MAIN__ ()
{
integer(kind=4) istat;
_gfortran_execute_command_line_i4 (&"echo \"Hello World!\""[1]{lb: 1 sz: 1},
0B, &istat, 0B, 0B, 19, 0);
}
Looking at libgfortran/intrinsics/execute_command_line.c, I see the following
in execute_command_line_i4:
if (exitstat)
estat_initial = estat = *exitstat;
execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
cmdmsg, command_len, cmdmsg_len);
if (exitstat && estat != estat_initial)
*exitstat = estat;
Apparenly the existat after the call is compared to the initial exitstat, which
can be uninitialized. I guess it would be better to set exitstat to some
defined initial value, instead of using the input value from outside.
>From gcc-bugs-return-581583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:10:14 2017
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From: "mhocko at kernel dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82963] New: -Waddress too trigger happy
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Bug ID: 82963
Summary: -Waddress too trigger happy
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Hi,
in the kernel we have a uggly^Wmacro to help printing numa mask defined as
follows
#define nodemask_pr_args(maskp) MAX_NUMNODES : (maskp)->bits
I have updated it to allow NULL maskp as follows
#define nodemask_pr_args(maskp) (maskp) ? MAX_NUMNODES : 0, (maskp) ?
(maskp)->bits : NULL
but this has triggered warnings on usage where it is clear that maskp is never
NULL. E.g.
In file included from include/linux/mmzone.h:17:0,
from include/linux/mempolicy.h:10,
from mm/mempolicy.c:70:
mm/mempolicy.c: In function 'mpol_to_str':
include/linux/nodemask.h:107:41: warning: the address of 'nodes' will always
evaluate as 'true' [-Waddress]
#define nodemask_pr_args(maskp) (maskp) ? MAX_NUMNODES : 0, (maskp) ?
(maskp)->bits : NULL
^
mm/mempolicy.c:2817:11: note: in expansion of macro 'nodemask_pr_args'
nodemask_pr_args(&nodes));
^
include/linux/nodemask.h:107:69: warning: the address of 'nodes' will always
evaluate as 'true' [-Waddress]
#define nodemask_pr_args(maskp) (maskp) ? MAX_NUMNODES : 0, (maskp) ?
(maskp)->bits : NULL
^
mm/mempolicy.c:2817:11: note: in expansion of macro 'nodemask_pr_args'
nodemask_pr_args(&nodes));
While the warning is correct and the given mask will always resolve to the
success path of the ternary operator I really fail to see why we should warn
about this fact. I really do not see any potential problem which could be
caused by this fact.
Moreover the warning itself is quite inconsistent. E.g. the following warns
about the explicit &m but not for n. So I believe this is more of a suboptimal
warning implementation than real intention.
#include <stdio.h>
#define MAX_NUMNODES 10
struct mask {
void *bits;
};
#define nodemask_pr_args(maskp) (maskp) ? MAX_NUMNODES : 0, (maskp) ?
(maskp)->bits : NULL
int foo(void)
{
struct mask m;
struct mask *n = &m;
printf("%*p\n", nodemask_pr_args(&m));
printf("%*p\n", nodemask_pr_args(n));
return 0;
}
>From gcc-bugs-return-581584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:11:34 2017
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Subject: [Bug c/82963] -Waddress too trigger happy
Date: Mon, 13 Nov 2017 12:11:00 -0000
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--- Comment #1 from Michal Hocko <mhocko at kernel dot org> ---
Btw. the compiler doesn't complain if I rewrite the macro to do an explicit
NULL check
(maskp != NULL) ? MAX_NUMNODES : 0, (maskp != NULL) ? (maskp)->bits : NULL
>From gcc-bugs-return-581585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:13:51 2017
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Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
Date: Mon, 13 Nov 2017 12:13:00 -0000
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--- Comment #1 from janus at gcc dot gnu.org ---
Possible patch:
Index: libgfortran/intrinsics/execute_command_line.c
===================================================================
--- libgfortran/intrinsics/execute_command_line.c (revision 254678)
+++ libgfortran/intrinsics/execute_command_line.c (working copy)
@@ -145,10 +145,11 @@ execute_command_line_i4 (const char *command, GFC_
gfc_charlen_type cmdmsg_len)
{
bool w = wait ? *wait : true;
- int estat, estat_initial, cstat;
+ const int estat_initial = -100;
+ int estat, cstat;
if (exitstat)
- estat_initial = estat = *exitstat;
+ estat = estat_initial;
execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
cmdmsg, command_len, cmdmsg_len);
Question is: What's a suitable value for estat_initial?
The same changes need to apply to execute_command_line_i8 as well.
>From gcc-bugs-return-581586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:19:30 2017
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Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
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--- Comment #2 from janus at gcc dot gnu.org ---
Since it seems that execute_command_line always sets a return value for the
exitstat argument, one probably does not need to check against an initial value
at all:
Index: libgfortran/intrinsics/execute_command_line.c
===================================================================
--- libgfortran/intrinsics/execute_command_line.c (revision 254678)
+++ libgfortran/intrinsics/execute_command_line.c (working copy)
@@ -145,15 +145,12 @@ execute_command_line_i4 (const char *command, GFC_
gfc_charlen_type cmdmsg_len)
{
bool w = wait ? *wait : true;
- int estat, estat_initial, cstat;
+ int estat, cstat;
- if (exitstat)
- estat_initial = estat = *exitstat;
-
execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
cmdmsg, command_len, cmdmsg_len);
- if (exitstat && estat != estat_initial)
+ if (exitstat)
*exitstat = estat;
if (cmdstat)
*cmdstat = cstat;
>From gcc-bugs-return-581587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:20:40 2017
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Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
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>From gcc-bugs-return-581588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 12:47:26 2017
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--- Comment #3 from janus at gcc dot gnu.org ---
I have verified that the patch in comment 2 fixes the problem on trunk.
>From gcc-bugs-return-581589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 13:42:01 2017
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Subject: [Bug c/82134] warn_unused_result triggers on empty structs even when they are used
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Arne Vogel <arvo at me dot com> changed:
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----------------------------------------------------------------------------
CC| |arvo at me dot com
--- Comment #4 from Arne Vogel <arvo at me dot com> ---
@Jakub Jelinek: Returning empty structs (this affects empty tuples as well) can
be useful in templates. E.g.
struct empty_t {};
template<typename C>
void executeContext()
{
auto savedState = C::prepare();
C::execute();
C::cleanup(std::move(savedState));
}
/*
* Context which does not require saving state but should be compatible
* with executeContext().
*/
struct StatelessContext
{
static empty_t prepare();
static void execute();
static void cleanup(empty_t);
};
// Usage: executeContext<StatelessContext>();
Obviously, void does not work here *precisely* because executeContext saves
(i.e. uses) the return value. I have an example that makes more sense than the
above, but takes longer to explain. Anyway, I hope you get the idea.
A possible workaround is e.g. to use a dummy char instead. The documentation
says (slightly misleadingly, see below) empty structs in G++ are treated as
though they contained a single char. But this in turn may cause unwanted
interference e.g. with empty base optimization.
>From gcc-bugs-return-581590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 13:47:29 2017
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Subject: [Bug c/82134] warn_unused_result triggers on empty structs even when they are used
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't argue that returning empty structures can be sometimes useful.
But I fail to understand why would you want to use warn_unused_result attribute
on such functions, that just makes no sense, because there is no harm if the
empty struct is not copied to a temporary.
>From gcc-bugs-return-581591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 13:54:02 2017
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Subject: [Bug target/82964] New: gfortran.dg/class_array_1.f03 regression since r254388
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Bug ID: 82964
Summary: gfortran.dg/class_array_1.f03 regression since r254388
Product: gcc
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As already reported in https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00286.html
,
a few fortran tests now ICE since r254388 on aarch64:
gfortran.dg/class_array_1.f03 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (internal compiler error)
gfortran.dg/type_to_class_3.f03 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (internal compiler error)
gfortran.dg/type_to_class_3.f03 -O3 -g (internal compiler error)
gfortran.dg/widechar_intrinsics_5.f90 -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions (internal compiler
error)
gfortran.dg/widechar_intrinsics_5.f90 -O3 -g (internal compiler error)
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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Mon, 13 Nov 2017 14:34:00 -0000
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--- Comment #17 from Jan Hubicka <hubicka at ucw dot cz> ---
> > This seems reasonable things to do. Only what BB reorder misses is that it
> > may do the partitining fixup after the duplication. I am not sure if that is
> > desirable as that would affect existing trace that may need to be updated, too.
>
> The result is suboptimal though, since you end up with a (cold) block in the
> hot partition whose only predecessors are in the cold partition. What happens
> in this case if copy_bb_p returns false for the problematic block, i.e. if you
> move the test I added lines 579-584 into the copy_bb_p predicate itself? Does
> this result in a better reordered sequence of blocks?
I have only dumps. Martin, would it be easy for you to rebuild it with the
change?
I would say that the duplication here is desriable optimization. Disabling it
would only pesmize code in hot path that we don't want to do. So we would paper
around missed optimization ICE by disabling another optimization.
Right thing to do would be to move that BB into cold partition. In this case
it won't be hard as it is not partitioned yet, so one would only need to check
that partitioning fixes are OK.
Other option may be to make partitining fixes to adjust the BB ordering. I.e.
move all blocks promoted to be cold into beggining of cold section. That would
still result in not completely optimal BB placement though.
Honza
>From gcc-bugs-return-581593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 14:39:51 2017
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Mon, 13 Nov 2017 14:39:00 -0000
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--- Comment #13 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
Sounds like -Wno-stringop-overflow does not propagate into LTO build.
I'll try make a small testcase
>From gcc-bugs-return-581594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 15:47:53 2017
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Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
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janus at gcc dot gnu.org changed:
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--- Comment #4 from janus at gcc dot gnu.org ---
Also it regtests cleanly.
>From gcc-bugs-return-581595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 15:49:02 2017
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Subject: [Bug c++/82737] [ICE] Compiler segfault on compilation of a certain file (full cause unknown) (file too large for upload, link provided)
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #21 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
yeah, I messed up. I had presumed that once set, DECL_ASSEMBLER_NAME does not
change. That is untrue.
In this case it's even worse, in that DECL_ASSEMBLER_NAME is set on a new decl
that duplicate_decl then deletes. This is a latent bug that never triggered on
the old code, but would have left the global namespace pointing at dead
storage.
>From gcc-bugs-return-581596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 15:50:14 2017
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Subject: [Bug other/82965] New: [8 regression][armeb] gcc.dg/vect/pr79347.c starts failing after r254379
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Bug ID: 82965
Summary: [8 regression][armeb] gcc.dg/vect/pr79347.c starts
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After r254379, I've noticed a regression on arm big-endian targets (armeb):
FAIL: gcc.dg/vect/pr79347.c -flto -ffat-lto-objects scan-tree-dump-not vect
"Invalid sum of "
FAIL: gcc.dg/vect/pr79347.c scan-tree-dump-not vect "Invalid sum of "
This could be a duplicate of bug #82925, but that one targets ppc64 both LE and
BE.
>From gcc-bugs-return-581597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:02:32 2017
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Subject: [Bug bootstrap/82948] [8 Regression] prefix.c:202:15: error: 'char* strncpy(char*, const char*, size_t)' destination unchanged after copying no bytes [-Werror=stringop-truncation]
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Sudakshina Das <sudi.das at arm dot com> changed:
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--- Comment #3 from Sudakshina Das <sudi.das at arm dot com> ---
I think this is breaking glibc build on aarch64-none-linux-gnu and
arm-none-linux-gnueabihf.
../sysdeps/unix/sysv/linux/if_index.c: In function '__if_nametoindex':
../sysdeps/unix/sysv/linux/if_index.c:46:3: error: 'strncpy' specified bound 16
equals destination size [-Werror=stringop-truncation]
strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
>From gcc-bugs-return-581598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:18:04 2017
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Subject: [Bug libstdc++/82966] New: node_handle swap fails to compile
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Bug ID: 82966
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Created attachment 42593
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42593&action=edit
Simple demonstration of error
Swapping a node handle fails because 'propagate_on_container_swap' is a type
but is used as a value in bits/node_handle.h. It should be
'propagate_on_container_swap::value'. I've attached an example that fails to
compile.
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
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--- Comment #14 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Dmitry G. Dyachenko from comment #12)
I'm afraid the warning in the constant string case is unavoidable. The call is
folded at a point where the checker doesn't have access to the subsequent
statement. At the same time, it can be viewed as a feature since the code
would be more clearly written simply as strcpy(p, "1").
>From gcc-bugs-return-581600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:44:17 2017
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
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--- Comment #15 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Dmitry G. Dyachenko from comment #12)
LTO doesn't interact with these warnings very well. pr71907 and pr79062 track
a couple of the problems I know about. If you find a different issue please do
open a new bug.
>From gcc-bugs-return-581601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:45:32 2017
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From: "samuel.thibault@ens-lyon.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82967] New: "did you mean" suggestions are way too suggestive
Date: Mon, 13 Nov 2017 16:45:00 -0000
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Bug ID: 82967
Summary: "did you mean" suggestions are way too suggestive
Product: gcc
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Hello,
The new suggestions brought by recent gcc are nice to catch up mere typoes.
They are however quite often misleading, I could for instance see
'PATH_MAX' undeclared (first use in this function); did you mean 'INT8_MAX'?
implicit declaration of function ‘time’; did you mean ‘nice’?
implicit declaration of function ‘bar’; did you mean ‘carg’?
programming beginners will start writing all kinds of crazy code due to this:
"the compiler told me to do it"...
Changing half of the letters of a word, or 3 or more letters, looks too
suggestive to me, I'd say it should be reduced to at most 2 letters, and less
than a quarter or a third of the word.
Samuel
>From gcc-bugs-return-581602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:54:35 2017
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Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
As I explained in comment #0, a_5(D)->d can safely be assumed not to point to
itself as a result of the subsequent access to what it points to in strlen, and
thanks to the fact that a string literal is never a valid representation of a
pointer.
Joseph's bare metal case of strlen (((struct A*)"123")->d) from comment #2
could be handled either by detecting and warning about it, or accommodated
under -ffreestanding or some new option to disable the optimization.
>From gcc-bugs-return-581603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 16:57:13 2017
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 42594
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42594&action=edit
genmatch crash report
(In reply to Richard Biener from comment #3)
> Hmm, GCC 4.2 as host compiler and using non-standard flags (-Os). Can you
> try
> with standard flags? It's probably miscompiling libcpp and/or genmatch.
When removing -Os it instead segfaults:
build/genmatch --gimple ../../gcc/match.pd \
> tmp-gimple-match.c
/bin/sh: line 1: 76756 Segmentation fault build/genmatch --gimple
../../gcc/match.pd > tmp-gimple-match.c
make[3]: *** [s-match] Error 139
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2
Attaching the crash reporter log.
>From gcc-bugs-return-581604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 17:01:18 2017
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
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--- Comment #16 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
(In reply to Martin Sebor from comment #15)
Thank you. Nice warnings!
>From gcc-bugs-return-581605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 17:04:32 2017
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> Created attachment 42594 [details]
> genmatch crash report
>
> (In reply to Richard Biener from comment #3)
> > Hmm, GCC 4.2 as host compiler and using non-standard flags (-Os). Can you
> > try
> > with standard flags? It's probably miscompiling libcpp and/or genmatch.
>
> When removing -Os it instead segfaults:
>
> build/genmatch --gimple ../../gcc/match.pd \
> > tmp-gimple-match.c
> /bin/sh: line 1: 76756 Segmentation fault build/genmatch --gimple
> ../../gcc/match.pd > tmp-gimple-match.c
> make[3]: *** [s-match] Error 139
> make[2]: *** [all-stage1-gcc] Error 2
> make[1]: *** [stage1-bubble] Error 2
> make: *** [all] Error 2
>
> Attaching the crash reporter log.
I should probably also include the compilation warnings from a little above the
crash:
/usr/bin/g++-4.2 -c -g -DIN_GCC -fPIC -fno-strict-aliasing -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings -Wcast-qual
-Wno-format -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../gcc -I../../gcc/build
-I../../gcc/../include -I../../gcc/../libcpp/include -I/opt/local/include \
-o build/genmatch.o ../../gcc/genmatch.c
../../gcc/vec.h: In static member function ‘static size_t vec<T, A,
vl_embed>::embedded_size(unsigned int) [with T = c_expr::id_tab, A = va_heap]’:
../../gcc/vec.h:286: instantiated from ‘static void va_heap::reserve(vec<T,
va_heap, vl_embed>*&, unsigned int, bool) [with T = c_expr::id_tab]’
../../gcc/vec.h:1473: instantiated from ‘bool vec<T, va_heap,
vl_ptr>::reserve(unsigned int, bool) [with T = c_expr::id_tab]’
../../gcc/vec.h:1582: instantiated from ‘T* vec<T, va_heap,
vl_ptr>::safe_push(const T&) [with T = c_expr::id_tab]’
../../gcc/genmatch.c:1330: instantiated from here
../../gcc/vec.h:1075: warning: invalid access to non-static data member
‘vec<c_expr::id_tab, va_heap, vl_embed>::m_vecdata’ of NULL object
../../gcc/vec.h:1075: warning: (perhaps the ‘offsetof’ macro was used
incorrectly)
../../gcc/vec.h: In static member function ‘static size_t vec<T, A,
vl_embed>::embedded_size(unsigned int) [with T = std::pair<user_id*, id_base*>,
A = va_heap]’:
../../gcc/vec.h:286: instantiated from ‘static void va_heap::reserve(vec<T,
va_heap, vl_embed>*&, unsigned int, bool) [with T = std::pair<user_id*,
id_base*>]’
../../gcc/vec.h:1473: instantiated from ‘bool vec<T, va_heap,
vl_ptr>::reserve(unsigned int, bool) [with T = std::pair<user_id*, id_base*>]’
../../gcc/vec.h:1493: instantiated from ‘bool vec<T, va_heap,
vl_ptr>::reserve_exact(unsigned int) [with T = std::pair<user_id*, id_base*>]’
../../gcc/vec.h:1556: instantiated from ‘void vec<T, va_heap,
vl_ptr>::safe_splice(const vec<T, va_heap, vl_ptr>&) [with T =
std::pair<user_id*, id_base*>]’
../../gcc/genmatch.c:1462: instantiated from here
../../gcc/vec.h:1075: warning: invalid access to non-static data member
‘vec<std::pair<user_id*, id_base*>, va_heap, vl_embed>::m_vecdata’ of NULL
object
../../gcc/vec.h:1075: warning: (perhaps the ‘offsetof’ macro was used
incorrectly)
>From gcc-bugs-return-581606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 17:05:26 2017
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Subject: [Bug fortran/82968] New: gfortran.dg/ieee/ieee_6.f90 fails at -O0
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Bug ID: 82968
Summary: gfortran.dg/ieee/ieee_6.f90 fails at -O0
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Host: sparc64-linux
Target: sparc64-linux
Build: sparc64-linux
The test raises SIGBUS at run time:
Starting program: /1/ebotcazou/build/ieee_6
Program received signal SIGBUS, Bus error.
__GI___fegetenv (envp=0x7fefffff14c) at ../sysdeps/sparc/fpu/fegetenv.c:25
25 ../sysdeps/sparc/fpu/fegetenv.c: No such file or directory.
(gdb) bt
#0 __GI___fegetenv (envp=0x7fefffff14c) at ../sysdeps/sparc/fpu/fegetenv.c:25
#1 0x0000000000100c68 in MAIN__ () at ieee_6.f90:23
because envp is not a multiple of 8. On this platform, fenv_t is defined as:
/* Type representing floating-point environment. */
typedef unsigned long int fenv_t;
so fegetenv expects an address multiple of 8 (the size of 'long').
The problematic Fortran type is apparently declared in ieee_exceptions.F90:
type, public :: IEEE_STATUS_TYPE
private
character(len=GFC_FPE_STATE_BUFFER_SIZE) :: hidden
end type
with the GFC_FPE_STATE_BUFFER_SIZE parameter coming from libgfortran.h:
/* Size of the buffer required to store FPU state for any target.
In particular, this has to be larger than fenv_t on all glibc targets.
Currently, the winner is x86_64 with 32 bytes. */
#define GFC_FPE_STATE_BUFFER_SIZE 32
This obviously overlooks alignment constraints.
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Subject: [Bug lto/81351] [8 regression] Many LTO testcases FAIL
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81351
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon Nov 13 17:26:41 2017
New Revision: 254697
URL: https://gcc.gnu.org/viewcvs?rev=254697&root=gcc&view=rev
Log:
PR lto/81351
* debug.h (dwarf2out_do_eh_frame): Declare.
* dwarf2cfi.c (dwarf2out_do_eh_frame): New predicate.
(dwarf2out_do_frame): Use it.
(dwarf2out_do_cfi_asm): Likewise.
* dwarf2out.c (dwarf2out_frame_finish): Likewise.
(dwarf2out_assembly_start): Likewise.
(dwarf2out_begin_prologue): Fix comment.
* toplev.c (compile_file): Always call dwarf2out_frame_finish
if the target needs either debug or unwind DWARF2 info.
* lto-opts.c (lto_write_options): Do not save -fexceptions,
-fnon-call-exceptions, -ffp-contract, -fmath-errno, -fsigned-zeros,
-ftrapping-math, -ftrapv and -fwrapv.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/debug.h
trunk/gcc/dwarf2cfi.c
trunk/gcc/dwarf2out.c
trunk/gcc/lto-opts.c
trunk/gcc/toplev.c
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Subject: [Bug fortran/82969] New: ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
Date: Mon, 13 Nov 2017 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82969
Bug ID: 82969
Summary: ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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This variant does not compile with snapshot from 20171112 :
$ cat z1.f90
module m
type t
real, allocatable :: x(:)
procedure(f), nopass, pointer :: g
end type
contains
function f() result(z)
class(t), allocatable :: z
end
end
$ gfortran-8-20171112 -c z1.f90
z1.f90:10:0:
end
internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x75c0de gfc_class_vptr_get(tree_node*)
../../gcc/fortran/trans-expr.c:211
0x75c6c8 class_vtab_field_get
../../gcc/fortran/trans-expr.c:280
0x75c6c8 gfc_class_vtab_size_get(tree_node*)
../../gcc/fortran/trans-expr.c:314
0x741de8 structure_alloc_comps
../../gcc/fortran/trans-array.c:8836
0x75ef9a gfc_trans_scalar_assign(gfc_se*, gfc_se*, gfc_typespec, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:8848
0x76d301 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10143
0x731de5 trans_code
../../gcc/fortran/trans.c:1843
0x75897c gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6421
0x735841 gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2206
0x6ea84d translate_all_program_units
../../gcc/fortran/parse.c:6078
0x6ea84d gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
---
While configured with --enable-checking=yes :
$ gfortran-8-20171112-chk -c z1.f90
z1.f90:10:0:
end
internal compiler error: tree check: expected record_type or union_type or
qual_union_type, have function_type in gfc_class_data_get, at
fortran/trans-expr.c:188
0x610875 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/tree.c:9098
0x79578b tree_check3(tree_node*, char const*, int, char const*, tree_code,
tree_code, tree_code)
../../gcc/tree.h:3128
0x79578b gfc_class_data_get(tree_node*)
../../gcc/fortran/trans-expr.c:188
0x773896 structure_alloc_comps
../../gcc/fortran/trans-array.c:8834
0x799c4a gfc_trans_scalar_assign(gfc_se*, gfc_se*, gfc_typespec, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:8848
0x7ab3a9 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10143
0x75e3f5 trans_code
../../gcc/fortran/trans.c:1843
0x7913e8 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6421
0x763399 gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2206
0x715ced translate_all_program_units
../../gcc/fortran/parse.c:6078
0x715ced gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x75b20f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/82969] ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
Date: Mon, 13 Nov 2017 17:29:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
These variants compile :
$ cat z2.f90
module m
type t
real, allocatable :: x(:)
procedure(f), nopass, pointer :: g
end type
contains
function f() result(z)
class(t), pointer :: z
end
end
$ cat z3.f90
module m
type t
procedure(f), nopass, pointer :: g
end type
contains
function f() result(z)
class(t), allocatable :: z
end
end
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Subject: [Bug lto/81351] [8 regression] Many LTO testcases FAIL
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81351
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed at last.
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Subject: [Bug lto/81351] [8 regression] Many LTO testcases FAIL
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon Nov 13 17:29:37 2017
New Revision: 254700
URL: https://gcc.gnu.org/viewcvs?rev=254700&root=gcc&view=rev
Log:
PR lto/81351
* dwarf2out.c (do_eh_frame): New static variable.
(dwarf2out_begin_prologue): Set it.
(dwarf2out_frame_finish): Test it instead of dwarf2out_do_eh_frame.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
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Subject: [Bug fortran/82970] ICE in vptr_field_get, at fortran/trans-expr.c:264
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
This variant compiles, of course :
$ cat z3.f90
program p
type t
end type
class(t), allocatable :: x(:)[:]
class(t), allocatable :: z(:)
allocate (x(2)[*])
allocate (z, source=x)
end
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Subject: [Bug fortran/82970] New: ICE in vptr_field_get, at fortran/trans-expr.c:264
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Bug ID: 82970
Summary: ICE in vptr_field_get, at fortran/trans-expr.c:264
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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Wrapping source "x" :
$ cat z1.f90
program p
type t
end type
class(t), allocatable :: x(:)[:]
class(t), allocatable :: z(:)
allocate (x(2)[*])
allocate (z, source=(x))
end
$ cat z2.f90
program p
type t
end type
class(t), allocatable :: x(:)[:]
class(t), allocatable :: z(:)
allocate (x(2)[*])
allocate (z, mold=(x))
end
$ gfortran-8-20171112 -c z1.f90 -fcoarray=single
z1.f90:7:0:
allocate (z, source=(x))
internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x75b91f vptr_field_get
../../gcc/fortran/trans-expr.c:264
0x75c71d gfc_vptr_size_get(tree_node*)
../../gcc/fortran/trans-expr.c:325
0x79f9fb gfc_trans_allocate(gfc_code*)
../../gcc/fortran/trans-stmt.c:5842
0x731ce7 trans_code
../../gcc/fortran/trans.c:1980
0x75897c gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6421
0x6ea920 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x6ea920 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
$ cat z2.f90
module m
type t
end type
class(t), target :: z
type t2
class(t), pointer :: x => z
end type
end
$ gfortran-8-20171112 -c z2.f90
f951: internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x6760cb gfc_find_vtab(gfc_typespec*)
../../gcc/fortran/class.c:2837
0x699092 gfc_check_pointer_assign(gfc_expr*, gfc_expr*)
../../gcc/fortran/expr.c:3738
0x699dca gfc_check_assign_symbol(gfc_symbol*, gfc_component*, gfc_expr*)
../../gcc/fortran/expr.c:3947
0x706aaa resolve_component
../../gcc/fortran/resolve.c:13870
0x7072a2 resolve_fl_derived0
../../gcc/fortran/resolve.c:13982
0x70750b resolve_fl_derived
../../gcc/fortran/resolve.c:14077
0x7020cf resolve_symbol
../../gcc/fortran/resolve.c:14436
0x71cb8b do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x70548a resolve_types
../../gcc/fortran/resolve.c:16328
0x700dbc gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16442
0x6eac74 gfc_parse_file()
../../gcc/fortran/parse.c:6232
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/82971] New: ICE in gfc_find_derived_vtab, at fortran/class.c:2214 ...
Date: Mon, 13 Nov 2017 17:35:00 -0000
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Bug ID: 82971
Summary: ICE in gfc_find_derived_vtab, at fortran/class.c:2214
...
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Another issue :
$ cat z1.f90
module m
type t
integer :: n
end type
class(t), target :: z
type t2
class(t), pointer :: x => z
end type
end
$ gfortran-8-20171112 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x671d71 gfc_find_derived_vtab(gfc_symbol*)
../../gcc/fortran/class.c:2214
0x6760d3 gfc_find_vtab(gfc_typespec*)
../../gcc/fortran/class.c:2837
0x699092 gfc_check_pointer_assign(gfc_expr*, gfc_expr*)
../../gcc/fortran/expr.c:3738
0x699dca gfc_check_assign_symbol(gfc_symbol*, gfc_component*, gfc_expr*)
../../gcc/fortran/expr.c:3947
0x706aaa resolve_component
../../gcc/fortran/resolve.c:13870
0x7072a2 resolve_fl_derived0
../../gcc/fortran/resolve.c:13982
0x70750b resolve_fl_derived
../../gcc/fortran/resolve.c:14077
0x7020cf resolve_symbol
../../gcc/fortran/resolve.c:14436
0x71cb8b do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x70548a resolve_types
../../gcc/fortran/resolve.c:16328
0x700dbc gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16442
0x6eac74 gfc_parse_file()
../../gcc/fortran/parse.c:6232
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Mon, 13 Nov 2017 18:14:00 -0000
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--- Comment #17 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
(In reply to Martin Sebor from comment #14)
> (In reply to Dmitry G. Dyachenko from comment #12)
>
> I'm afraid the warning in the constant string case is unavoidable. The call
> is folded at a point where the checker doesn't have access to the subsequent
> statement. At the same time, it can be viewed as a feature since the code
> would be more clearly written simply as strcpy(p, "1").
This can be resolved in this way. However strcpy is not recommended because it
does not check buffer size and can cause buffer overflow (however in this
particular case it would be safe to use). It would be good to use strlcpy here,
however it is not supported by gcc/glibc now. Maybe these new warnings will
help with adding them to gcc/glibc, I saw that many people in the past
requested this but without luck.
>From gcc-bugs-return-581617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 18:42:36 2017
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Subject: [Bug tree-optimization/82945] add warning for passing non-strings to functions that expect string arguments
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00955.html
>From gcc-bugs-return-581618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 20:02:01 2017
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Subject: [Bug sanitizer/82869] c_associated does not always give false for null pointers
Date: Mon, 13 Nov 2017 20:02:00 -0000
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--- Comment #9 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Mon Nov 13 20:01:20 2017
New Revision: 254706
URL: https://gcc.gnu.org/viewcvs?rev=254706&root=gcc&view=rev
Log:
Introduce logical_type_node and use it
Backport from trunk.
Earlier GFortran used to redefine boolean_type_node, which in the rest
of the compiler means the C/C++ _Bool/bool type, to the Fortran
default logical type. When this redefinition was removed, a few
issues surfaced. Namely,
1) PR 82869, where we created a boolean tmp variable, and passed it to
the runtime library as a Fortran logical variable of a different size.
2) Fortran specifies that logical operations should be done with the
default logical kind, not in any other kind.
3) Using 8-bit variables have some issues, such as
- on x86, partial register stalls and length prefix changes.
- s390 has a compare with immediate and jump instruction which
works with 32-bit but not 8-bit quantities.
This patch addresses these issues by introducing a type
logical_type_node which is a Fortran LOGICAL variable of default
kind. It is then used in places were the Fortran standard mandates, as
well as for compiler generated temporary variables.
For x86-64, using the Polyhedron benchmark suite, no performance or
code size difference worth mentioning was observed.
Regtested on x86_64-pc-linux-gnu.
gcc/fortran/ChangeLog:
2017-11-13 Janne Blomqvist <jb@gcc.gnu.org>
PR 82869
* convert.c (truthvalue_conversion): Use logical_type_node.
* trans-array.c (gfc_trans_allocate_array_storage): Likewise.
(gfc_trans_create_temp_array): Likewise.
(gfc_trans_array_ctor_element): Likewise.
(gfc_trans_array_constructor_value): Likewise.
(trans_array_constructor): Likewise.
(trans_array_bound_check): Likewise.
(gfc_conv_array_ref): Likewise.
(gfc_trans_scalarized_loop_end): Likewise.
(gfc_conv_array_extent_dim): Likewise.
(gfc_array_init_size): Likewise.
(gfc_array_allocate): Likewise.
(gfc_trans_array_bounds): Likewise.
(gfc_trans_dummy_array_bias): Likewise.
(gfc_conv_array_parameter): Likewise.
(duplicate_allocatable): Likewise.
(duplicate_allocatable_coarray): Likewise.
(structure_alloc_comps): Likewise
(get_std_lbound): Likewise
(gfc_alloc_allocatable_for_assignment): Likewise
* trans-decl.c (add_argument_checking): Likewise
(gfc_generate_function_code): Likewise
* trans-expr.c (gfc_copy_class_to_class): Likewise
(gfc_trans_class_array_init_assign): Likewise
(gfc_trans_class_init_assign): Likewise
(gfc_conv_expr_present): Likewise
(gfc_conv_substring): Likewise
(gfc_conv_cst_int_power): Likewise
(gfc_conv_expr_op): Likewise
(gfc_conv_procedure_call): Likewise
(fill_with_spaces): Likewise
(gfc_trans_string_copy): Likewise
(gfc_trans_alloc_subarray_assign): Likewise
(gfc_trans_pointer_assignment): Likewise
(gfc_trans_scalar_assign): Likewise
(fcncall_realloc_result): Likewise
(alloc_scalar_allocatable_for_assignment): Likewise
(trans_class_assignment): Likewise
(gfc_trans_assignment_1): Likewise
* trans-intrinsic.c (build_fixbound_expr): Likewise
(gfc_conv_intrinsic_aint): Likewise
(gfc_trans_same_strlen_check): Likewise
(conv_caf_send): Likewise
(trans_this_image): Likewise
(conv_intrinsic_image_status): Likewise
(trans_image_index): Likewise
(gfc_conv_intrinsic_bound): Likewise
(conv_intrinsic_cobound): Likewise
(gfc_conv_intrinsic_mod): Likewise
(gfc_conv_intrinsic_dshift): Likewise
(gfc_conv_intrinsic_dim): Likewise
(gfc_conv_intrinsic_sign): Likewise
(gfc_conv_intrinsic_ctime): Likewise
(gfc_conv_intrinsic_fdate): Likewise
(gfc_conv_intrinsic_ttynam): Likewise
(gfc_conv_intrinsic_minmax): Likewise
(gfc_conv_intrinsic_minmax_char): Likewise
(gfc_conv_intrinsic_anyall): Likewise
(gfc_conv_intrinsic_arith): Likewise
(gfc_conv_intrinsic_minmaxloc): Likewise
(gfc_conv_intrinsic_minmaxval): Likewise
(gfc_conv_intrinsic_btest): Likewise
(gfc_conv_intrinsic_bitcomp): Likewise
(gfc_conv_intrinsic_shift): Likewise
(gfc_conv_intrinsic_ishft): Likewise
(gfc_conv_intrinsic_ishftc): Likewise
(gfc_conv_intrinsic_leadz): Likewise
(gfc_conv_intrinsic_trailz): Likewise
(gfc_conv_intrinsic_mask): Likewise
(gfc_conv_intrinsic_spacing): Likewise
(gfc_conv_intrinsic_rrspacing): Likewise
(gfc_conv_intrinsic_size): Likewise
(gfc_conv_intrinsic_sizeof): Likewise
(gfc_conv_intrinsic_transfer): Likewise
(gfc_conv_allocated): Likewise
(gfc_conv_associated): Likewise
(gfc_conv_same_type_as): Likewise
(gfc_conv_intrinsic_trim): Likewise
(gfc_conv_intrinsic_repeat): Likewise
(conv_isocbinding_function): Likewise
(conv_intrinsic_ieee_is_normal): Likewise
(conv_intrinsic_ieee_is_negative): Likewise
(conv_intrinsic_ieee_copy_sign): Likewise
(conv_intrinsic_move_alloc): Likewise
* trans-io.c (set_parameter_value_chk): Likewise
(set_parameter_value_inquire): Likewise
(set_string): Likewise
* trans-openmp.c (gfc_walk_alloc_comps): Likewise
(gfc_omp_clause_default_ctor): Likewise
(gfc_omp_clause_copy_ctor): Likewise
(gfc_omp_clause_assign_op): Likewise
(gfc_omp_clause_dtor): Likewise
(gfc_omp_finish_clause): Likewise
(gfc_trans_omp_clauses): Likewise
(gfc_trans_omp_do): Likewise
* trans-stmt.c (gfc_trans_goto): Likewise
(gfc_trans_sync): Likewise
(gfc_trans_arithmetic_if): Likewise
(gfc_trans_simple_do): Likewise
(gfc_trans_do): Likewise
(gfc_trans_forall_loop): Likewise
(gfc_trans_where_2): Likewise
(gfc_trans_allocate): Likewise
(gfc_trans_deallocate): Likewise
* trans-types.c (gfc_init_types): Initialize logical_type_node and
their true/false trees.
(gfc_get_array_descr_info): Use logical_type_node.
* trans-types.h (logical_type_node): New tree.
(logical_true_node): Likewise.
(logical_false_node): Likewise.
* trans.c (gfc_trans_runtime_check): Use logical_type_node.
(gfc_call_malloc): Likewise
(gfc_allocate_using_malloc): Likewise
(gfc_allocate_allocatable): Likewise
(gfc_add_comp_finalizer_call): Likewise
(gfc_add_finalizer_call): Likewise
(gfc_deallocate_with_status): Likewise
(gfc_deallocate_scalar_with_status): Likewise
(gfc_call_realloc): Likewise
gcc/testsuite/ChangeLog:
2017-11-13 Janne Blomqvist <jb@gcc.gnu.org>
PR 82869
* gfortran.dg/logical_temp_io.f90: New test.
* gfortran.dg/logical_temp_io_kind8.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/logical_temp_io.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/logical_temp_io_kind8.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/convert.c
branches/gcc-7-branch/gcc/fortran/trans-array.c
branches/gcc-7-branch/gcc/fortran/trans-decl.c
branches/gcc-7-branch/gcc/fortran/trans-expr.c
branches/gcc-7-branch/gcc/fortran/trans-intrinsic.c
branches/gcc-7-branch/gcc/fortran/trans-io.c
branches/gcc-7-branch/gcc/fortran/trans-openmp.c
branches/gcc-7-branch/gcc/fortran/trans-stmt.c
branches/gcc-7-branch/gcc/fortran/trans-types.c
branches/gcc-7-branch/gcc/fortran/trans-types.h
branches/gcc-7-branch/gcc/fortran/trans.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "james.s.spencer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82869] c_associated does not always give false for null pointers
Date: Mon, 13 Nov 2017 20:04:00 -0000
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--- Comment #11 from james.s.spencer at gmail dot com ---
(In reply to Janne Blomqvist from comment #10)
> Fixed now on the gcc-7 branch as well. Thanks James for reporting, and
> Martin for bisecting!
Thanks for the quick fix!
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/82869] c_associated does not always give false for null pointers
Date: Mon, 13 Nov 2017 20:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82869
Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Fixed now on the gcc-7 branch as well. Thanks James for reporting, and Martin
for bisecting!
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82970] ICE in vptr_field_get, at fortran/trans-expr.c:264
Date: Mon, 13 Nov 2017 20:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82970
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-13
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 6.4.0 up to trunk (8.0).
If I replace
allocate (z, source=(x))
with
allocate (z(2), source=(x))
compiling the test gives an ICE also for 4.8, 4.9, and 5.
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Subject: [Bug fortran/78619] [6/7/8 Regression] ICE in copy_reference_ops_from_ref, at tree-ssa-sccvn.c:889
Date: Mon, 13 Nov 2017 20:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78619
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Nov 13 20:43:26 2017
New Revision: 254708
URL: https://gcc.gnu.org/viewcvs?rev=254708&root=gcc&view=rev
Log:
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/78619
* check.c (same_type_check): Introduce a new argument 'assoc'
with default value false. If this is true, use the symbol type
spec of BT_PROCEDURE expressions.
(gfc_check_associated): Set 'assoc' true in the call to
'same_type_check'.
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/78619
* gfortran.dg/pr78619.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr78619.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/check.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
Date: Mon, 13 Nov 2017 20:46:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Nov 13 20:46:08 2017
New Revision: 254709
URL: https://gcc.gnu.org/viewcvs?rev=254709&root=gcc&view=rev
Log:
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/82934
* trans-stmt.c (gfc_trans_allocate): Remove the gcc_assert on
null string length for assumed length typespec and set
expr3_esize to NULL_TREE;
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/82934
* gfortran.dg/allocate_assumed_charlen_1.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/allocate_assumed_charlen_1.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/trans-stmt.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/82972] New: ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Mon, 13 Nov 2017 21:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82972
Bug ID: 82972
Summary: ICE with -finit-derived in gfc_conv_structure, at
fortran/trans-expr.c:7733 (and others)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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There are a few issues with -finit-derived, probably a consequence
of pr82886. Please feel free to open separate PRs if it fits better.
gcc configured with --enable-checking=yes.
Files from catalog ./gcc/testsuite/gfortran.dg :
c_ptr_tests_14.f90
c_ptr_tests_15.f90
pr32627.f03
pr35983.f90
lto/bind_c-1_0.f90
$ gfortran-8-20171105 -finit-derived -c c_ptr_tests_14.f90
$ gfortran-8-20171112 -finit-derived -c c_ptr_tests_14.f90
c_ptr_tests_14.f90:25:0:
program test
internal compiler error: Segmentation fault
0xcaca2f crash_signal
../../gcc/toplev.c:325
0x7a88f6 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc/tree.h:3201
0x7a88f6 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7733
0x7a82b1 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6867
0x7a8921 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7735
0x7a82b1 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6867
0x78c5fc gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1819
0x790327 generate_local_decl
../../gcc/fortran/trans-decl.c:5492
0x74802b do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x7910f2 generate_local_vars
../../gcc/fortran/trans-decl.c:5692
0x7910f2 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6356
0x715dc0 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x715dc0 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x75b20f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/82972] ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Mon, 13 Nov 2017 21:06:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Files from catalog ./gcc/testsuite/gfortran.dg :
pdt_10.f03
pdt_2.f03
$ gfortran-8-20171105 -finit-derived -c pdt_2.f03
$ gfortran-8-20171112 -finit-derived -c pdt_2.f03
pdt_2.f03:25:0:
end subroutine
internal compiler error: in gfc_conv_string_init, at fortran/trans-const.c:148
0x77ff69 gfc_conv_string_init(tree_node*, gfc_expr*)
../../gcc/fortran/trans-const.c:148
0x7a827f gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6874
0x7a8921 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7735
0x7a82b1 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6867
0x78c5fc gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1819
0x790327 generate_local_decl
../../gcc/fortran/trans-decl.c:5492
0x74802b do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x7910f2 generate_local_vars
../../gcc/fortran/trans-decl.c:5692
0x7910f2 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6356
0x715dc0 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x715dc0 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x75b20f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/82972] ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Mon, 13 Nov 2017 21:07:00 -0000
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--- Comment #2 from G. Steinmetz <gscfq@t-online.de> ---
Files from catalog ./gcc/testsuite/gfortran.dg :
pdt_3.f03
pdt_7.f03
$ gfortran-8-20171105 -finit-derived -c pdt_7.f03
$ gfortran-8-20171112 -finit-derived -c pdt_7.f03
pdt_7.f03:20:0:
end
internal compiler error: in gfc_conv_expr_descriptor, at
fortran/trans-array.c:6983
0x77b4fb gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:6983
0x7a37b1 gfc_trans_alloc_subarray_assign
../../gcc/fortran/trans-expr.c:7001
0x7a6d99 gfc_trans_subcomponent_assign
../../gcc/fortran/trans-expr.c:7339
0x7a6687 gfc_trans_structure_assign(tree_node*, gfc_expr*, bool, bool)
../../gcc/fortran/trans-expr.c:7622
0x7a8c02 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7689
0x7a1074 gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7856
0x7aaba9 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10000
0x785030 gfc_init_default_dt(gfc_symbol*, stmtblock_t*, bool)
../../gcc/fortran/trans-decl.c:4010
0x78ee21 gfc_trans_deferred_vars(gfc_symbol*, gfc_wrapped_block*)
../../gcc/fortran/trans-decl.c:4688
0x791563 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6526
0x715dc0 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x715dc0 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x75b20f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-581627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:11:04 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82971] ICE in gfc_find_derived_vtab, at fortran/class.c:2214 ...
Date: Mon, 13 Nov 2017 21:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82971
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-13
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
My instrumented compiler gives
../../work/gcc/fortran/class.c:2837:36: runtime error: member access within
null pointer of type 'struct gfc_component'
>From gcc-bugs-return-581628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:18:35 2017
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Subject: [Bug fortran/82886] ICE with -finit-derived in gfc_conv_expr, at fortran/trans-expr.c:7807
Date: Mon, 13 Nov 2017 21:18:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-581629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:19:55 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82973] New: ICE in output_constant_pool_2, at varasm.c:3896 on aarch64
Date: Mon, 13 Nov 2017 21:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82973
Bug ID: 82973
Summary: ICE in output_constant_pool_2, at varasm.c:3896 on
aarch64
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: amker at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: aarch64-linux-gnu
Trunk does with cross compiler:
$ aarch64-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/intrinsic_modulo_1.f90
-frounding-math -Ofast -c
during RTL pass: final
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/intrinsic_modulo_1.f90:37:0:
end program main
internal compiler error: in output_constant_pool_2, at varasm.c:3896
0xee97bb output_constant_pool_2
.././../gcc/varasm.c:3896
0xee974d output_constant_pool_2
.././../gcc/varasm.c:3929
0xee9846 output_constant_pool_1
.././../gcc/varasm.c:3997
0xef85d9 output_constant_pool_contents
.././../gcc/varasm.c:4134
0xef9003 output_constant_pool
.././../gcc/varasm.c:4162
0xef9003 assemble_end_function(tree_node*, char const*)
.././../gcc/varasm.c:1912
0x8b0f3f rest_of_handle_final
.././../gcc/final.c:4488
0x8b0f3f execute
.././../gcc/final.c:4551
>From gcc-bugs-return-581631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:21:28 2017
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Subject: [Bug fortran/82972] [8 Regression] ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Mon, 13 Nov 2017 21:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82972
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-13
CC| |foreese at gcc dot gnu.org
Summary|ICE with -finit-derived in |[8 Regression] ICE with
|gfc_conv_structure, at |-finit-derived in
|fortran/trans-expr.c:7733 |gfc_conv_structure, at
|(and others) |fortran/trans-expr.c:7733
| |(and others)
Ever confirmed|0 |1
>From gcc-bugs-return-581630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:21:24 2017
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Subject: [Bug target/82974] New: ICE in extract_insn, at recog.c:2305 on aarch64
Date: Mon, 13 Nov 2017 21:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82974
Bug ID: 82974
Summary: ICE in extract_insn, at recog.c:2305 on aarch64
Product: gcc
Version: 7.0
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: amker at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: aarch64-linux-gnu
Following cross-compiler ICEs:
$ aarch64-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/dfp/inf-1.c -O1 -c
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/dfp/inf-1.c: In
function ‘main’:
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/dfp/inf-1.c:61:1:
error: unrecognizable insn:
}
^
(insn 103 102 104 13 (set (subreg:TI (reg:TD 113) 0)
(const_wide_int 0x77ffcff3fcff3fcff3fcff3fcff3fcff))
"/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/dfp/inf-1.c":26 -1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/dfp/inf-1.c:61:1:
internal compiler error: in extract_insn, at recog.c:2305
0x57c010 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
.././../gcc/rtl-error.c:108
0x57c02f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
.././../gcc/rtl-error.c:116
0xacdd2f extract_insn(rtx_insn*)
.././../gcc/recog.c:2305
0x883ceb instantiate_virtual_regs_in_insn
.././../gcc/function.c:1591
0x883ceb instantiate_virtual_regs
.././../gcc/function.c:1959
0x883ceb execute
.././../gcc/function.c:2008
>From gcc-bugs-return-581632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:25:03 2017
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From: "foreese at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82972] [8 Regression] ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Mon, 13 Nov 2017 21:25:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |foreese at gcc dot gnu.org
--- Comment #3 from Fritz Reese <foreese at gcc dot gnu.org> ---
Yikes! I'll take a look, thanks for the report.
>From gcc-bugs-return-581633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:27:18 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82975] New: ICE in baseness at rtlanal.c:6220
Date: Mon, 13 Nov 2017 21:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82975
Bug ID: 82975
Summary: ICE in baseness at rtlanal.c:6220
Product: gcc
Version: 7.0
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: amker at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: arm-linux-gnueabi-gcc
Following can be seen with cross-compiler:
$ arm-linux-gnueabi-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr78904-6.c
/dev/null -mtune=cortex-a57 -fno-sched-pressure -O3
during RTL pass: sched1
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr78904-6.c: In
function ‘foo’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr78904-6.c:20:1:
internal compiler error: Segmentation fault
}
^
0xb692af crash_signal
.././../gcc/toplev.c:325
0xaff79d baseness
.././../gcc/rtlanal.c:6220
0xb075c9 decompose_normal_address
.././../gcc/rtlanal.c:6290
0xb075c9 decompose_address(address_info*, rtx_def**, machine_mode, unsigned
char, rtx_code)
.././../gcc/rtlanal.c:6336
0x1256745 analyze_set_insn_for_autopref
.././../gcc/haifa-sched.c:5535
0x1256932 analyze_set_insn_for_autopref
.././../gcc/haifa-sched.c:5621
0x1256932 autopref_multipass_init
.././../gcc/haifa-sched.c:5621
0x12601ea autopref_multipass_dfa_lookahead_guard(rtx_insn*, int)
.././../gcc/haifa-sched.c:5734
0x126a8d9 choose_ready
.././../gcc/haifa-sched.c:6121
0x126a8d9 schedule_block(basic_block_def**, void*)
.././../gcc/haifa-sched.c:6763
0xb1034a schedule_region
.././../gcc/sched-rgn.c:3174
0xb1034a schedule_insns()
.././../gcc/sched-rgn.c:3513
0xb10863 schedule_insns()
.././../gcc/sched-rgn.c:3498
0xb10863 rest_of_handle_sched
.././../gcc/sched-rgn.c:3717
0xb10863 execute
.././../gcc/sched-rgn.c:3825
>From gcc-bugs-return-581634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:29:16 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82973] ICE in output_constant_pool_2, at varasm.c:3896 on aarch64
Date: Mon, 13 Nov 2017 21:29:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-13
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Has the test compiled on aarch64-linux-gnu-gcc with the options?
Note that the test fails at run time when compiled with -frounding-math and
-Ofast.
>From gcc-bugs-return-581635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:34:33 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82976] New: [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Mon, 13 Nov 2017 21:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82976
Bug ID: 82976
Summary: [8 Regression] Error: non-trivial conversion at
assignment since r254526
Product: gcc
Version: 7.0
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Starting from the mentioned revision we ICE on:
$ gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/realloc_on_assign_16.f90
-Ofast -fno-tree-forwprop
Error: non-trivial conversion at assignment
logical(kind=4)
logical(kind=1)
_54 = 0;
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/realloc_on_assign_16.f90:28:0:
Error: non-trivial conversion at assignment
logical(kind=4)
logical(kind=1)
_47 = 0;
during GIMPLE pass: dom
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/realloc_on_assign_16.f90:28:0:
internal compiler error: verify_gimple failed
0xc63c6d verify_gimple_in_cfg(function*, bool)
.././../gcc/tree-cfg.c:5392
0xb36fc6 execute_function_todo
.././../gcc/passes.c:1994
0xb38042 execute_todo
.././../gcc/passes.c:2048
>From gcc-bugs-return-581636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:43:32 2017
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Subject: [Bug fortran/78240] ICE in match_clist_expr, at fortran/decl.c:728
Date: Mon, 13 Nov 2017 21:43:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
CC| |foreese at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |foreese at gcc dot gnu.org
--- Comment #4 from Fritz Reese <foreese at gcc dot gnu.org> ---
> https://gcc.gnu.org/ml/fortran/2017-11/msg00076.html
Patch pending.
>From gcc-bugs-return-581637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:49:54 2017
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Subject: [Bug c++/82360] [8 Regression] tree check fail in get_inner_reference, at expr.c:6996
Date: Mon, 13 Nov 2017 21:49:00 -0000
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--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Nov 13 21:49:16 2017
New Revision: 254710
URL: https://gcc.gnu.org/viewcvs?rev=254710&root=gcc&view=rev
Log:
PR c++/82360 - ICE with static_cast in template.
* call.c (perform_direct_initialization_if_possible): Check
processing_template_decl.
* typeck.c (build_static_cast_1): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/template/cast5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/typeck.c
>From gcc-bugs-return-581638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 21:53:27 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82977] New: [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Mon, 13 Nov 2017 21:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82977
Bug ID: 82977
Summary: [8 Regression] AddressSanitizer: heap-use-after-free
in strlen_optimize_stmt
.././../gcc/tree-ssa-strlen.c:2971
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Probably starting from Martin's r254630 sanitizer compiler produces:
$ gcc -g -O2 cp-demangle.i
==22482==ERROR: AddressSanitizer: heap-use-after-free on address 0x611000000448
at pc 0x000000779828 bp 0x7fffec942150 sp 0x7fffec942148
READ of size 4 at 0x611000000448 thread T0
#0 0x779827 in std::pair<int, unsigned int>::operator=(std::pair<int,
unsigned int> const&)
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/builddir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_pair.h:372
#1 0x779827 in hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::put(tree_node* const&, std::pair<int, unsigned int> const&)
.././../gcc/hash-map.h:142
#2 0x779827 in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
#3 0x779827 in strlen_dom_walker::before_dom_children(basic_block_def*)
.././../gcc/tree-ssa-strlen.c:3137
#4 0x2fc26b7 in dom_walker::walk(basic_block_def*)
.././../gcc/domwalk.c:308
#5 0x1efb4c9 in execute .././../gcc/tree-ssa-strlen.c:3209
#6 0x174c5eb in execute_one_pass(opt_pass*) .././../gcc/passes.c:2497
#7 0x174ddc2 in execute_pass_list_1 .././../gcc/passes.c:2586
#8 0x174ddec in execute_pass_list_1 .././../gcc/passes.c:2587
#9 0x174de6b in execute_pass_list(function*, opt_pass*)
.././../gcc/passes.c:2597
#10 0xea9e27 in cgraph_node::expand() .././../gcc/cgraphunit.c:2139
#11 0xeacb2a in expand_all_functions .././../gcc/cgraphunit.c:2275
#12 0xeacb2a in symbol_table::compile() .././../gcc/cgraphunit.c:2623
#13 0xeb3470 in symbol_table::compile() .././../gcc/cgraphunit.c:2719
#14 0xeb3470 in symbol_table::finalize_compilation_unit()
.././../gcc/cgraphunit.c:2716
#15 0x1a04bcd in compile_file .././../gcc/toplev.c:480
#16 0x97ecd7 in do_compile .././../gcc/toplev.c:2060
#17 0x97ecd7 in toplev::main(int, char**) .././../gcc/toplev.c:2195
#18 0x9893c4 in main .././../gcc/main.c:39
#19 0x7fe5161e0f49 in __libc_start_main (/lib64/libc.so.6+0x20f49)
#20 0x98a5c9 in _start
(/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/builddir/gcc/cc1+0x98a5c9)
0x611000000448 is located 72 bytes inside of 208-byte region
[0x611000000400,0x6110000004d0)
freed by thread T0 here:
#0 0xa51240 in __interceptor_free
../../.././../libsanitizer/asan/asan_malloc_linux.cc:66
#1 0x1f10fcb in xcallocator<hash_map<tree_node*, std::pair<int, unsigned
int>, simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int,
unsigned int> > >::hash_entry>::data_free(hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry*) .././../gcc/hash-table.h:273
#2 0x1f10fcb in hash_table<hash_map<tree_node*, std::pair<int, unsigned
int>, simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int,
unsigned int> > >::hash_entry, xcallocator>::expand()
.././../gcc/hash-table.h:765
previously allocated by thread T0 here:
#0 0xa5175c in __interceptor_calloc
../../.././../libsanitizer/asan/asan_malloc_linux.cc:95
#1 0x33f8e50 in xcalloc .././../libiberty/xmalloc.c:162
SUMMARY: AddressSanitizer: heap-use-after-free
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/builddir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_pair.h:372
in std::pair<int, unsigned int>::operator=(std::pair<int, unsigned int> const&)
Shadow bytes around the buggy address:
0x0c227fff8030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff8040: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
0x0c227fff8050: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c227fff8060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff8070: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c227fff8080: fd fd fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd
0x0c227fff8090: fd fd fd fd fd fd fd fd fd fd fa fa fa fa fa fa
0x0c227fff80a0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c227fff80b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff80c0: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff80d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==22482==ABORTING
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Mon, 13 Nov 2017 21:54:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 42595
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42595&action=edit
test-case
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82737] [ICE] Compiler segfault on compilation of a certain file (full cause unknown) (file too large for upload, link provided)
Date: Mon, 13 Nov 2017 21:58:00 -0000
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--- Comment #22 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #21)
> yeah, I messed up. I had presumed that once set, DECL_ASSEMBLER_NAME does
> not change. That is untrue.
> In this case it's even worse, in that DECL_ASSEMBLER_NAME is set on a new
> decl that duplicate_decl then deletes. This is a latent bug that never
> triggered on the old code, but would have left the global namespace pointing
> at dead storage.
Good, I'm happy you're able to reproduce and to fix that ;)
>From gcc-bugs-return-581641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 22:05:39 2017
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Subject: [Bug fortran/82973] ICE in output_constant_pool_2, at varasm.c:3896 on aarch64
Date: Mon, 13 Nov 2017 22:05:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> Has the test compiled on aarch64-linux-gnu-gcc with the options?
No, it also ICEs ;)
>From gcc-bugs-return-581642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 13 22:35:06 2017
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Subject: [Bug c++/82360] [8 Regression] tree check fail in get_inner_reference, at expr.c:6996
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 01:26:25 2017
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Subject: [Bug fortran/78240] ICE in match_clist_expr, at fortran/decl.c:728
Date: Tue, 14 Nov 2017 01:26:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug fortran/78240] ICE in match_clist_expr, at fortran/decl.c:728
Date: Tue, 14 Nov 2017 01:26:00 -0000
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--- Comment #5 from Fritz Reese <foreese at gcc dot gnu.org> ---
Author: foreese
Date: Tue Nov 14 01:25:26 2017
New Revision: 254718
URL: https://gcc.gnu.org/viewcvs?rev=254718&root=gcc&view=rev
Log:
2017-11-13 Fritz Reese <fritzoreese@gmail.com>
PR fortran/78240
gcc/fortran/ChangeLog:
PR fortran/78240
* decl.c (match_clist_expr): Replace gcc_assert with proper
handling of bad result from spec_size().
* resolve.c (check_data_variable): Avoid NULL dereference when passing
locus to gfc_error.
gcc/testsuite/ChangeLog:
PR fortran/78240
* gfortran.dg/dec_structure_23.f90: New.
* gfortran.dg/pr78240.f90: New.
Added:
trunk/gcc/testsuite/gfortran.dg/dec_structure_23.f90
trunk/gcc/testsuite/gfortran.dg/pr78240.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 02:11:24 2017
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Subject: [Bug fortran/82978] New: [PDT] [F2003] Paramaterized Derived Type LEN parameters take the latest value per-kind
Date: Tue, 14 Nov 2017 02:11:00 -0000
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Bug ID: 82978
Summary: [PDT] [F2003] Paramaterized Derived Type LEN
parameters take the latest value per-kind
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Created attachment 42596
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42596&action=edit
test case exhibiting strange PDT behavior
In the attached file I see what I believe is unusual behavior. I skimmed the
F03/F08 specs and by all accounts I could see, this behavior is unexpected.
To summarize/generalize the test file, with the following declarations:
> type :: pdt_t(k, l)
> integer, kind :: k
> integer, len :: l
> character(len=l) :: ch
> end type
>
> type(pdt_t(k, l1)) :: t1
> type(pdt_t(k, l2)) :: t2
> ...
> type(pdt_t(k, ln)) :: tn
Then I see that len(t1%ch) == len(t2%ch) == ... == len(tn%ch) == ln. That is to
say, every PDT variable gets ch with the last length defined for the same kind.
If different kinds are passed, then the lengths seem to differ fine.
Here is my output for the attached file:
$ gfortran --version
GNU Fortran (GCC) 8.0.0 20171107 (experimental)
[...]
$ gfortran pdtlens.f03
$ ./a.out
exp. len act. len
1 2
2 2
4 5
5 5
9 7
7 7
100 200
200 200
Am I just misinterpreting the Fortran spec, or is this a real bug?
>From gcc-bugs-return-581646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 02:24:36 2017
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Subject: [Bug c++/60702] thread_local initialization
Date: Tue, 14 Nov 2017 02:24:00 -0000
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Kan Wang <tinrow at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tinrow at gmail dot com
--- Comment #5 from Kan Wang <tinrow at gmail dot com> ---
+1 for this. If class member has thread-local storage and is first accessed
through member access operator (e.g. a.foo), it is not initialized as expected.
The short code snippet below reproduces the bug on g++ 4.8 - 7.1
#include <iostream>
int init() {
std::cout << "init" << std::endl;
return 0;
}
struct A {
static thread_local int foo;
};
thread_local int A::foo { init() };
int main() {
A a;
int i = a.foo;
std::cout << "--- should be initialized above ---" << std::endl;
i = A::foo;
return i;
}
Output:
--- should be initialized above ---
init
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Subject: [Bug fortran/82979] New: [PDT] [F2003] [ice-on-invalid] ICE (segfault) on invalid type-param-name-list in PDT declaration
Date: Tue, 14 Nov 2017 02:30:00 -0000
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Bug ID: 82979
Summary: [PDT] [F2003] [ice-on-invalid] ICE (segfault) on
invalid type-param-name-list in PDT declaration
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Created attachment 42597
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42597&action=edit
test case which causes the ICE
Currently the compiler ICEs due to a segmentation fault when given an invalid
type-param-name-list, such as in the attached file (and shown here):
$ gfortran --version | head -n1
GNU Fortran (GCC) 8.0.0 20171114 (experimental)
$ cat ./test.f03
type :: pdt_t(k=4)
integer, kind :: k
end type
end
$ gfortran ./test.f03
./test.f03:1:15:
type :: pdt_t(k=4)
1
Error: Expected parameter list in type declaration at (1)
f951: internal compiler error: Segmentation fault
0xca9a9f crash_signal
/data/midas/foreese/src/gcc-dev/gcc/toplev.c:325
0x6d260a delete_root
/data/midas/foreese/src/gcc-dev/gcc/fortran/bbt.c:150
0x6d27be gfc_delete_bbt(void*, void*, int (*)(void*, void*))
/data/midas/foreese/src/gcc-dev/gcc/fortran/bbt.c:197
0x789128 gfc_delete_symtree(gfc_symtree**, char const*)
/data/midas/foreese/src/gcc-dev/gcc/fortran/symbol.c:2925
0x78a8bf gfc_restore_last_undo_checkpoint()
/data/midas/foreese/src/gcc-dev/gcc/fortran/symbol.c:3694
0x74af47 reject_statement
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:2546
0x74afa4 match_word
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:70
0x74e30f decode_statement
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:565
0x74f32c next_free
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:1225
0x74f32c next_statement
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:1457
0x7545f1 gfc_parse_file()
/data/midas/foreese/src/gcc-dev/gcc/fortran/parse.c:6160
0x7987bf gfc_be_parse_file
/data/midas/foreese/src/gcc-dev/gcc/fortran/f95-lang.c:204
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-581648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 03:11:19 2017
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From: "barry.revzin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82980] New: Regression in determination of current instantiation (invalid requirement of template keyword)
Date: Tue, 14 Nov 2017 03:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82980
Bug ID: 82980
Summary: Regression in determination of current instantiation
(invalid requirement of template keyword)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: barry.revzin at gmail dot com
Target Milestone: ---
Consider this example (reduced from SO:
https://stackoverflow.com/q/47261553/2069064)
template <class T>
struct Outer
{
template <class U>
void f();
void bar(Outer outer) {
[outer](){ outer.f<int>(); }; // error
}
};
int main() { }
outer is an instance of the current instantiation, so outer.f isn't type
dependent, so the template keyword shouldn't be required. However, gcc 7 and
later diagnose:
prog.cc: In lambda function:
prog.cc:8:28: error: expected primary-expression before 'int'
[outer](){ outer.f<int>(); };
^~~
prog.cc:8:28: error: expected ';' before 'int'
gcc 6.3 and earlier accept, as does clang.
>From gcc-bugs-return-581649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 03:34:34 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Tue, 14 Nov 2017 03:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82977
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2017-11-13 00:00:00 |2017-11-14
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I don't have a sanitizer build but I think it's safe to confirm there's
something wrong based on the Valgrind output below.
$ gcc -O2 -S -Wall pr82977.i -wrapper valgrind
==10920== Memcheck, a memory error detector
==10920== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==10920== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==10920== Command: /ssd/build/gcc-git/gcc/cc1 -fpreprocessed pr82977.i -quiet
-dumpbase pr82977.i -mtune=generic -march=x86-64 -auxbase pr82977 -O2 -Wall -o
pr82977.s
==10920==
In file included from cp-demangle.c:140:
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/libstdc++-v3/../libiberty/cp-demangle.h:184:1:
warning: ‘cplus_demangle_mangled_name’ declared ‘static’ but never defined
[-Wunused-function]
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/libstdc++-v3/../libiberty/cp-demangle.h:188:1:
warning: ‘cplus_demangle_type’ declared ‘static’ but never defined
[-Wunused-function]
cp-demangle.c:4323:1: warning: ‘d_print’ defined but not used
[-Wunused-function]
==10920== Invalid read of size 8
==10920== at 0x101C826: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::put(tree_node* const&, std::pair<int, unsigned int> const&)
(hash-map.h:142)
==10920== by 0x101B8DF: strlen_optimize_stmt(gimple_stmt_iterator*)
(tree-ssa-strlen.c:2972)
==10920== by 0x101BFA8:
strlen_dom_walker::before_dom_children(basic_block_def*)
(tree-ssa-strlen.c:3138)
==10920== by 0x17BB4F9: dom_walker::walk(basic_block_def*) (domwalk.c:308)
==10920== by 0x101C1A5: (anonymous
namespace)::pass_strlen::execute(function*) (tree-ssa-strlen.c:3210)
==10920== by 0xCDD02C: execute_one_pass(opt_pass*) (passes.c:2497)
==10920== by 0xCDD37B: execute_pass_list_1(opt_pass*) (passes.c:2586)
==10920== by 0xCDD3AC: execute_pass_list_1(opt_pass*) (passes.c:2587)
==10920== by 0xCDD404: execute_pass_list(function*, opt_pass*)
(passes.c:2597)
==10920== by 0x92DF5F: cgraph_node::expand() (cgraphunit.c:2139)
==10920== by 0x92E403: expand_all_functions() (cgraphunit.c:2275)
==10920== by 0x92EE87: symbol_table::compile() (cgraphunit.c:2623)
==10920== Address 0x63cd178 is 136 bytes inside a block of size 208 free'd
==10920== at 0x4C2ED4A: free (vg_replace_malloc.c:530)
==10920== by 0x101D837: xcallocator<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry>::data_free(hash_map<tree_node*,
std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::hash_entry*) (hash-table.h:273)
==10920== by 0x101DE6B: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry, xcallocator>::expand()
(hash-table.h:765)
==10920== by 0x101D28B: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry,
xcallocator>::find_slot_with_hash(tree_node* const&, unsigned int,
insert_option) (hash-table.h:879)
==10920== by 0x101C7EE: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::put(tree_node* const&, std::pair<int, unsigned int> const&)
(hash-map.h:137)
==10920== by 0x101B8DF: strlen_optimize_stmt(gimple_stmt_iterator*)
(tree-ssa-strlen.c:2972)
==10920== by 0x101BFA8:
strlen_dom_walker::before_dom_children(basic_block_def*)
(tree-ssa-strlen.c:3138)
==10920== by 0x17BB4F9: dom_walker::walk(basic_block_def*) (domwalk.c:308)
==10920== by 0x101C1A5: (anonymous
namespace)::pass_strlen::execute(function*) (tree-ssa-strlen.c:3210)
==10920== by 0xCDD02C: execute_one_pass(opt_pass*) (passes.c:2497)
==10920== by 0xCDD37B: execute_pass_list_1(opt_pass*) (passes.c:2586)
==10920== by 0xCDD3AC: execute_pass_list_1(opt_pass*) (passes.c:2587)
==10920== Block was alloc'd at
==10920== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==10920== by 0x197B203: xcalloc (xmalloc.c:162)
==10920== by 0x101E156: xcallocator<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry>::data_alloc(unsigned long)
(hash-table.h:263)
==10920== by 0x101D765: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry,
xcallocator>::alloc_entries(unsigned long) const (hash-table.h:650)
==10920== by 0x101CAD8: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry, xcallocator>::hash_table(unsigned
long, bool, bool, mem_alloc_origin) (hash-table.h:586)
==10920== by 0x101C509: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::hash_map(unsigned long, bool, bool) (hash-map.h:112)
==10920== by 0x101C3EC: __static_initialization_and_destruction_0(int, int)
(tree-ssa-strlen.c:157)
==10920== by 0x101C416: _GLOBAL__sub_I_laststmt (tree-ssa-strlen.c:3235)
==10920== by 0x198A38C: __libc_csu_init (in /ssd/build/gcc-git/gcc/cc1)
==10920== by 0x601438F: (below main) (in /usr/lib64/libc-2.24.so)
==10920==
==10920==
==10920== HEAP SUMMARY:
==10920== in use at exit: 8,264,061 bytes in 11,998 blocks
==10920== total heap usage: 631,542 allocs, 619,544 frees, 289,006,672 bytes
allocated
==10920==
==10920== LEAK SUMMARY:
==10920== definitely lost: 2,480 bytes in 24 blocks
==10920== indirectly lost: 720 bytes in 18 blocks
==10920== possibly lost: 0 bytes in 0 blocks
==10920== still reachable: 8,260,861 bytes in 11,956 blocks
==10920== suppressed: 0 bytes in 0 blocks
==10920== Rerun with --leak-check=full to see details of leaked memory
==10920==
==10920== For counts of detected and suppressed errors, rerun with: -v
==10920== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
>From gcc-bugs-return-581650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 05:08:54 2017
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82981] New: unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 14 Nov 2017 05:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981
Bug ID: 82981
Summary: unnecessary __multi3 call for mips64r6 linux kernel
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
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Given the testcase
unsigned long func(unsigned long a, unsigned long b)
{
return a > (~0UL) / b;
}
compiled with -march=mips64r6 -mabi=64 -mexplicit-relocs -O2 we end up with a
call to __multi3 which is inefficient and inconvenient.
The testcase gets converted to
_1 = MUL_OVERFLOW (a_4(D), b_5(D));
_2 = IMAGPART_EXPR <_1>;
There are no mulv patterns in the mips port, so it tries mulditi3 which fails,
and then calls __multi3.
Mips64r6 does have a widening DImode multiply which should have been used
instead. The problem is that the *mulditi3 pattern is missing mips64r6
support.
Alternatively, the expander should try using a muldi3_highpart pattern when the
mulditi3 pattern doesn't work. Especially when the highpart is the only part
we need as in this example. The mips64r6 multi3_highpart is present.
Or alternatively, a mulvti3 pattern should be added to the mips port.
See for instance the thread at
https://www.linux-mips.org/archives/linux-mips/2017-08/msg00041.html
>From gcc-bugs-return-581651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 05:13:26 2017
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82981] unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 14 Nov 2017 05:13:00 -0000
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--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> ---
This problem is causing link errors for the mips64r6 linux kernel. They would
like the gcc developers to fix it, instead of adding a definition of the
__multi3 function to the linux kernel.
>From gcc-bugs-return-581652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 05:27:38 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82982] New: [8 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
Date: Tue, 14 Nov 2017 05:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82982
Bug ID: 82982
Summary: [8 Regression] ICE: qsort checking failed (error:
qsort comparator non-negative on sorted output: 5) in
ready_sort_real in haifa scheduler
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-valid-code
Severity: normal
Priority: P3
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Target Milestone: ---
Target: powerpc-*-linux-gnu*, powerpcspe-*-linux-gnu*
gcc-8.0.0-alpha20171112 snapshot (r254666) for 32-bit BE powerpc targets ICEs
on the following snippet w/ -misel -Ofast -fgraphite-identity -funroll-loops
-fsched2-use-superblocks:
int xw, mj;
void
km (void)
{
int r1 = 0;
signed char *ny = (signed char *)&xw;
if (xw != 0)
for (;;)
{
for (xw = 1; xw < 3; ++xw)
{
for (*ny = 1; *ny < 2; ++*ny)
ny = (signed char *)&mj;
++r1;
if (r1 != 0)
{
w5:
if (xw != 0)
{
for (*ny = 0; *ny < 1; ++*ny)
ny = (signed char *)&r1;
++xw;
}
goto w5;
}
}
}
}
% powerpc-e300c3-linux-gnu-gcc-8.0.0-alpha20171112 -misel -Ofast
-fgraphite-identity -funroll-loops -fsched2-use-superblocks -c jyt0oer4.c
jyt0oer4.c: In function 'km':
jyt0oer4.c:31:1: error: qsort comparator non-negative on sorted output: 5
}
^
during RTL pass: sched2
jyt0oer4.c:31:1: internal compiler error: qsort checking failed
0x5c5263 qsort_chk_error
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/vec.c:222
0x150878a qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/vec.c:274
0x1401e7a ready_sort_real
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/haifa-sched.c:3087
0x140809f schedule_block(basic_block_def**, void*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/haifa-sched.c:6675
0x14a48f9 schedule_ebb(rtx_insn*, rtx_insn*, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/sched-ebb.c:537
0x14a5106 schedule_ebbs()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/sched-ebb.c:657
0xc115f4 rest_of_handle_sched2
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/sched-rgn.c:3735
0xc115f4 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20171112/work/gcc-8-20171112/gcc/sched-rgn.c:3873
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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Subject: [Bug target/82983] New: [8 Regression] ICE in extract_insn, at recog.c:2305 w/ GFMI
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Bug ID: 82983
Summary: [8 Regression] ICE in extract_insn, at recog.c:2305 w/
GFMI
Product: gcc
Version: 7.0
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Target Milestone: ---
Following ICEs:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/gfni-4.c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/gfni-4.c: In
function ‘avx512vl_test’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/gfni-4.c:16:1:
error: unrecognizable insn:
}
^
(insn 9 8 10 2 (set (reg:V16QI 91 [ _5 ])
(unspec:V16QI [
(reg:V16QI 90 [ _4 ])
(reg:V16QI 88 [ _2 ])
(const_int 3 [0x3])
] UNSPEC_GF2P8AFFINEINV))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/gfni-4.c":14 -1
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/gfni-4.c:16:1:
internal compiler error: in extract_insn, at recog.c:2305
0xeb6add _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0xeb6b1e _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc/rtl-error.c:116
0xe58259 extract_insn(rtx_insn*)
../../gcc/recog.c:2305
0xb57803 instantiate_virtual_regs_in_insn
../../gcc/function.c:1591
0xb58cdd instantiate_virtual_regs
../../gcc/function.c:1959
0xb58dac execute
../../gcc/function.c:2008
It's compiled with -mtune=generic -march=x86-64
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----------------------------------------------------------------------------
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #18 from Martin Liška <marxin at gcc dot gnu.org> ---
> The result is suboptimal though, since you end up with a (cold) block in the
> hot partition whose only predecessors are in the cold partition. What
> happens in this case if copy_bb_p returns false for the problematic block,
> i.e. if you move the test I added lines 579-584 into the copy_bb_p predicate
> itself? Does this result in a better reordered sequence of blocks?
Can you please cook a patch for that which I can test?
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #19 from Martin Liška <marxin at gcc dot gnu.org> ---
Steps to reproduce:
1) create OBS account: https://build.opensuse.org
2) osc checkout home:marxin:gcc8-incubator-small2
3) cd home:marxin:gcc8-incubator-small2
4) osc build i586
One can easily add a patch to spec file for testing.
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #20 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens on X86_64. I can reproduce the issue on gcc67 (Rzyen).
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--- Comment #21 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #20)
> Also happens on X86_64. I can reproduce the issue on gcc67 (Rzyen).
Can you please provide revision and configure flags? Does it happen for the
same source file?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78619
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Nov 14 08:15:52 2017
New Revision: 254719
URL: https://gcc.gnu.org/viewcvs?rev=254719&root=gcc&view=rev
Log:
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/78619
* check.c (same_type_check): Introduce a new argument 'assoc'
with default value false. If this is true, use the symbol type
spec of BT_PROCEDURE expressions.
(gfc_check_associated): Set 'assoc' true in the call to
'same_type_check'.
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/78619
* gfortran.dg/pr78619.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr78619.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/check.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
Date: Tue, 14 Nov 2017 08:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82946
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 13 Nov 2017, msebor at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82946
>
> --- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #3)
>
> As I explained in comment #0, a_5(D)->d can safely be assumed not to point to
> itself as a result of the subsequent access to what it points to in strlen, and
> thanks to the fact that a string literal is never a valid representation of a
> pointer.
A bit too much "magic" here for my taste as in "how'd you implement that
'logic' in GCC?"
We don't have any good way to represent flow-sensitive alias info
btw (and any such representation would be fragile as you can see with
all the lurking/fixed bugs caused by maintaining flow-sensitive
range info).
To me 'strlen' operates like mem*, it accesses storage through
a character type and thus is not subject to any type-based alias
rules. Given GCC doesn't distinguish between char * (character type)
and char * (string) I don't see how to implement that difference anyway.
This means you can very well replace memcpy with strcpy if you know
there's a '\0' in and only in the right place.
> Joseph's bare metal case of strlen (((struct A*)"123")->d) from comment #2
> could be handled either by detecting and warning about it, or accommodated
> under -ffreestanding or some new option to disable the optimization.
We certainly have to treat literal pointers encoded in any form
conservatively. I don't see how they are against any standard. There's
other clearly "valid" optimizations missing in GCC that look more
important to implement.
>From gcc-bugs-return-581662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 08:23:34 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Tue, 14 Nov 2017 08:23:00 -0000
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--- Comment #22 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #21)
> (In reply to Markus Trippelsdorf from comment #20)
> > Also happens on X86_64. I can reproduce the issue on gcc67 (Rzyen).
>
> Can you please provide revision and configure flags? Does it happen for the
> same source file?
Current trunk and yes, it happens for the same source file.
% ../gcc/configure --disable-libstdcxx-pch --disable-libvtv --disable-libitm
--disable-libcilkrts --disable-libssp --disable-libgomp --disable-werror
--disable-multilib --enable-languages=c,c++,fortran --enable-checking=release
% make -j8 BOOT_CFLAGS="-march=native -O3 -pipe" STAGE1_CFLAGS="-march=native
-O3 -pipe" CFLAGS_FOR_TARGET="-march=native -O3 -pipe"
CXXFLAGS_FOR_TARGET="-march=native -O3 -pipe" profiledbootstrap
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Subject: [Bug target/82983] [8 Regression] ICE in extract_insn, at recog.c:2305 w/ GFMI
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Julia Koval <jkoval at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-14
Ever confirmed|0 |1
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
Date: Tue, 14 Nov 2017 08:34:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, somehow I remember reports similar to this on Darwin. Can you try using
clang for bootstrap?
What X-Code version are you using on which OS version?
The crash reporter suggests sth goes wrong with linking as it seems to crash
during init already.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
Date: Tue, 14 Nov 2017 09:10:00 -0000
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--- Comment #23 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #22)
> (In reply to Martin Liška from comment #21)
> > (In reply to Markus Trippelsdorf from comment #20)
> > > Also happens on X86_64. I can reproduce the issue on gcc67 (Rzyen).
> >
> > Can you please provide revision and configure flags? Does it happen for the
> > same source file?
>
> Current trunk and yes, it happens for the same source file.
>
> % ../gcc/configure --disable-libstdcxx-pch --disable-libvtv
> --disable-libitm --disable-libcilkrts --disable-libssp --disable-libgomp
> --disable-werror --disable-multilib --enable-languages=c,c++,fortran
> --enable-checking=release
>
> % make -j8 BOOT_CFLAGS="-march=native -O3 -pipe"
> STAGE1_CFLAGS="-march=native -O3 -pipe" CFLAGS_FOR_TARGET="-march=native -O3
> -pipe" CXXFLAGS_FOR_TARGET="-march=native -O3 -pipe" profiledbootstrap
Thanks. I can confirm it works for me!
>From gcc-bugs-return-581666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 09:13:45 2017
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From: "michael_22 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82984] New: Execuable compiled with ASAN crashes with very limited information on Linux
Date: Tue, 14 Nov 2017 09:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82984
Bug ID: 82984
Summary: Execuable compiled with ASAN crashes with very limited
information on Linux
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: michael_22 at hotmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
I have run into an issue on Linux (RedHat): I have some C++ project compiled
with ASAN, the executable crashes with almost nothing useful.
The followings are the only stuff collected in ASAN logs:
==33856==ERROR: AddressSanitizer: SEGV on unknown address 0x7ffacd125490 (pc
0x7ffad5d9fa50 bp 0x7ffacd1254d8 sp 0x7ffacb49f228 T7)
I also have other cases that only
"=================================================================" printed in
the ASAN log.
It is appreciated if someone could suggest me on how to proceed with the
debugging.
Best regards,
Ralph
>From gcc-bugs-return-581667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 09:14:42 2017
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From: "BlenderEi at LwTV dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] New: GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 09:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82985
Bug ID: 82985
Summary: GCC 7.2.1 crashes when compiling DSO (Direct Sparse
Odometry) on Linux Ubuntu 17.10
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: BlenderEi at LwTV dot de
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Created attachment 42598
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42598&action=edit
Screenshot of the compilation process and the crash of GCC
Hello, this is my first time reporting a bug, so please be patient ;)
I came across this bug when trying to compile the Direct Sparse Odometry
project for my master thesis (see screenshot). You can find it here:
https://github.com/JakobEngel/dso
The steps to reproduce the bug are (on Linux, type in console [why am I even
telling you that... ;) ]):
> git clone https://github.com/JakobEngel/dso.git
> sudo apt-get install libsuitesparse-dev libeigen3-dev libboost-all-dev
> cd dso
> mkdir build
> cd build
> cmake ..
> make -j
I was advised to isolate the problem using "C-reduce". I try to do that, but
you are probably faster given your experience. Hopefully I can add it to this
report, after submitting it.
Thank you for your help and great work!
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Subject: [Bug sanitizer/82984] Execuable compiled with ASAN crashes with very limited information on Linux
Date: Tue, 14 Nov 2017 09:15:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please provide steps to reproduce that?
>From gcc-bugs-return-581669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 09:38:22 2017
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Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Tue, 14 Nov 2017 09:38:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42599
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42599&action=edit
gcc8-pr82977.patch
Untested fix. The bug is obvious, hash_map::put does:
bool put (const Key &k, const Value &v)
{
hash_entry *e = m_table.find_slot_with_hash (k, Traits::hash (k),
INSERT);
bool existed = !hash_entry::is_empty (*e);
if (!existed)
e->m_key = k;
e->m_value = v;
return existed;
}
so passing it a reference to a value inside of the hash map is wrong, because
if the hash map needs to be reallocated, it will make the reference refer to
freed memory.
I'll bootstrap/regtest this.
In any case,
static hash_map<tree, stridx_strlenloc> strlen_to_stridx;
is also wrong because it uselessly requires static initialization. See e.g.
decl_to_stridxlist_htab next to it, that is a pointer to hash_map instead.
>From gcc-bugs-return-581670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 09:41:42 2017
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Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Tue, 14 Nov 2017 09:41:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also, because strlen_to_stridx is only useful if warn_stringop_truncation, I
think if it is turned into a pointer to hash_map, then it could be left NULL if
!warn_stringop_truncation, and all the strlen_to_stridx related stuff only
performed if strlen_to_stridx != NULL.
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Subject: [Bug other/82965] [8 regression][armeb] gcc.dg/vect/pr79347.c starts failing after r254379
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug fortran/82972] [8 Regression] ICE with -finit-derived in gfc_conv_structure, at fortran/trans-expr.c:7733 (and others)
Date: Tue, 14 Nov 2017 09:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug rtl-optimization/82982] [8 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.3
Summary|unnecessary __multi3 call |[7/8 Regression]
|for mips64r6 linux kernel |unnecessary __multi3 call
| |for mips64r6 linux kernel
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We could also restrict MUL_OVERFLOW pattern matching to archs that can expand
it?
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Tue, 14 Nov 2017 10:11:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-14
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. The test compiles with '-O2 -fno-tree-forwprop' but not with'-O3
-fno-tree-forwprop'.
>From gcc-bugs-return-581678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 10:13:46 2017
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 14 Nov 2017 10:13:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That might not be that easy without repeating there big chunks of internal-fn.c
stuff.
In any case, what is mips64r6 using?
From the above it seems it doesn't have a corresponding optab, so
if (icode == CODE_FOR_nothing)
is true. Thus, is it:
if (GET_MODE_2XWIDER_MODE (mode).exists (&wmode)
&& targetm.scalar_mode_supported_p (wmode))
or
else if (int_mode_for_size (prec / 2, 1).exists (&hmode)
&& 2 * GET_MODE_PRECISION (hmode) == prec)
or the fallback case that doesn't report overflow:
else
{
gcc_assert (!is_ubsan);
ops.code = MULT_EXPR;
ops.type = type;
res = expand_expr_real_2 (&ops, NULL_RTX, mode, EXPAND_NORMAL);
emit_jump (done_label);
}
? If it is the first one from these, perhaps we should have some extra checks
there whether WIDEN_MULT_EXPR will be emitted as a library call or not.
Though, if mips64r6 has hipart multiplication, I don't see why it couldn't
handle the widening multiplication by performing normal DImode multiplication
plus highpart DImode multiplication or something similar.
>From gcc-bugs-return-581679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 10:31:32 2017
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Subject: [Bug fortran/82978] [PDT] [F2003] Paramaterized Derived Type LEN parameters take the latest value per-kind
Date: Tue, 14 Nov 2017 10:31:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-14
Blocks| |82173
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test shows two problems with PDT:
(1) The kind of the character is not taken into account:
Adding the line
print *, kind(w1%chr), kind(x1%chr), kind(y1%chr), kind(z1%chr)
gives
1 1 1 1
As a consequence the KINDs 2 and 8 are not properly rejected.
(2) The length is not properly set if there is more than one character PDT with
the same kind:
implicit none
type :: pdt_t(k, l)
integer, kind :: k
integer, len :: l
character(kind=k,len=l) :: chr
end type
type(pdt_t(1, 4)) :: x1
type(pdt_t(1, 5)) :: x2
type(pdt_t(1, 6)) :: x3
print *, 'exp. len act. len'
print *, x1%l, len(x1%chr)
print *, x2%l, len(x2%chr)
print *, x3%l, len(x3%chr)
end
gives
exp. len act. len
4 6
5 6
6 6
but I fail to see the logic:
type(pdt_t(1, 4)) :: x1
type(pdt_t(1, 6)) :: x3
type(pdt_t(1, 50)) :: x2
...
print *, x3%l, len(x3%chr)
print *, x1%l, len(x1%chr)
print *, x2%l, len(x2%chr)
gives
6 6
4 6
50 6
?-(
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] Parameterized derived type errors
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Subject: [Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-11/msg01061.ht
| |ml
--- Comment #9 from Rainer Orth <ro at gcc dot gnu.org> ---
Patch posted.
>From gcc-bugs-return-581681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 11:16:40 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Please attach the (compressed) preprocessed file.
See https://gcc.gnu.org/bugs/ for instructions.
>From gcc-bugs-return-581682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 11:34:10 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82986] New: [8 regression] gcc.dg/store_merging_13.c fail
Date: Tue, 14 Nov 2017 11:34:00 -0000
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Bug ID: 82986
Summary: [8 regression] gcc.dg/store_merging_13.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254536 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/store_merging_13.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -fdump-tree-store-merging -S -o
store_merging_13.s
PASS: gcc.dg/store_merging_13.c (test for excess errors)
FAIL: gcc.dg/store_merging_13.c scan-tree-dump-times store-merging "Merging
successful" 13 (found 12 times)
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Subject: [Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #6)
> Hmm, somehow I remember reports similar to this on Darwin. Can you try
> using clang for bootstrap?
>
> What X-Code version are you using on which OS version?
>
> The crash reporter suggests sth goes wrong with linking as it seems to crash
> during init already.
I'm using Xcode 3.2.6 on Snow Leopard. Using the system clang fails earlier in
configure but I think that's because I screwed up my system headers on this
system:
configure: error: uint64_t or int64_t not found
make[2]: *** [configure-stage1-gcc] Error 1
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2
clang 5.0 from MacPorts fails in libbacktrace with:
libtool: link: rm -fr .libs/libbacktrace.a .libs/libbacktrace.la
libtool: link: ar rc .libs/libbacktrace.a .libs/atomic.o .libs/dwarf.o
.libs/fileline.o .libs/posix.o .libs/print.o .libs/sort.o .libs/state.o
.libs/backtrace.o .libs/simple.o .libs/unknown.o .libs/mmapio.o .libs/mmap.o
ranlib: object: .libs/libbacktrace.a(dwarf.o) malformed object (unknown load
command 1)
ar: internal ranlib command failed
make[4]: *** [libbacktrace.la] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-stage1-libbacktrace] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2
...which is probably an issue I should raise with MacPorts instead.
It works when I use a previous version of gcc I built myself though. (8.0 from
20170525)
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Subject: [Bug tree-optimization/82986] [8 regression] gcc.dg/store_merging_13.c fail
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This should have been fixed in r254606 already.
>From gcc-bugs-return-581685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 11:47:44 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82986] [8 regression] gcc.dg/store_merging_13.c fail
Date: Tue, 14 Nov 2017 11:47:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
True.
Closing as fixed.
>From gcc-bugs-return-581686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 11:50:54 2017
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From: "sebastian.peryt at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82941] Missing vzeroupper with -march=skylake-avx512 -O2
Date: Tue, 14 Nov 2017 11:50:00 -0000
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Sebastian Peryt <sebastian.peryt at intel dot com> changed:
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----------------------------------------------------------------------------
CC| |sebastian.peryt at intel dot com
--- Comment #1 from Sebastian Peryt <sebastian.peryt at intel dot com> ---
Patch has been sent: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01052.html
>From gcc-bugs-return-581687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 11:51:00 2017
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Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Tue, 14 Nov 2017 11:51:00 -0000
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Sebastian Peryt <sebastian.peryt at intel dot com> changed:
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--- Comment #6 from Sebastian Peryt <sebastian.peryt at intel dot com> ---
Patch has been sent: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01052.html
>From gcc-bugs-return-581688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 12:07:11 2017
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 14 Nov 2017 12:07:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42600
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42600&action=edit
gcc8-pr82981.patch
Possible untested fix.
>From gcc-bugs-return-581689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 12:20:55 2017
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 14 Nov 2017 12:20:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Actually, it might be better to verify if the can_widen_mult_without_libcall
fails that hmode exists and is exactly half the size of prec, otherwise we
could end up with the worst case fallback that can't do overflow.
And/or, the PR71289 change could be guarded by precision equal to TYPE_MODE
precision and umulv4_optab present for that mode, otherwise MUL_OVERFLOW might
be more expensive than the division.
>From gcc-bugs-return-581690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 12:39:11 2017
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Subject: [Bug middle-end/82987] New: [8 regression] gcc.dg/vect/slp-perm-9.c fail
Date: Tue, 14 Nov 2017 12:39:00 -0000
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Bug ID: 82987
Summary: [8 regression] gcc.dg/vect/slp-perm-9.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254592 triggers this:
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/vect/slp-perm-9.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -flto -ffat-lto-objects -msse2 -ftree-vectorize
-fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details -lm -o
./slp-perm-9.exe
PASS: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects (test for excess errors)
PASS: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects scan-tree-dump-times
vect "vectorized 0 loops" 2 (found 1 times)
FAIL: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects scan-tree-dump-times
vect "vectorizing stmts using SLP" 0 (found 1 times)
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/vect/slp-perm-9.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -msse2 -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-vect-details -lm -o ./slp-perm-9.exe
PASS: gcc.dg/vect/slp-perm-9.c (test for excess errors)
PASS: gcc.dg/vect/slp-perm-9.c execution test
FAIL: gcc.dg/vect/slp-perm-9.c scan-tree-dump-times vect "vectorized 0 loops" 2
(found 1 times)
FAIL: gcc.dg/vect/slp-perm-9.c scan-tree-dump-times vect "vectorizing stmts
using SLP" 0 (found 1 times)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
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Subject: [Bug middle-end/82987] [8 regression] gcc.dg/vect/slp-perm-9.c fail
Date: Tue, 14 Nov 2017 12:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-581692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 12:56:38 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/82988] New: [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C fail
Date: Tue, 14 Nov 2017 12:56:00 -0000
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Bug ID: 82988
Summary: [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C
fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254630 triggers this:
---
spawn -ignore SIGHUP /work/gcc/testsuite/g++5/../../xg++
-B/work/gcc/testsuite/g++5/../../
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util -fmessage-length=0 -std=c++11
-pedantic-errors -Wno-long-long -S -o lambda-switch.s
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In member function
'void main()::A::f()':
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:15:6: error: case
label '4' not within a switch statement
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:16:8: error: break
statement not within loop or switch
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In lambda function:
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:21:6: error: case
label '3' not within a switch statement
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:22:8: error: break
statement not within loop or switch
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In function 'int
main()':
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:23:6: warning:
statement will never be executed [-Wswitch-unreachable]
compiler exited with status 1
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for errors, line
15)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for errors, line
16)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for warnings, line
19)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for errors, line
21)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for errors, line
22)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++11 (test for excess errors)
---
spawn -ignore SIGHUP /work/gcc/testsuite/g++5/../../xg++
-B/work/gcc/testsuite/g++5/../../
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util -fmessage-length=0 -std=c++14
-pedantic-errors -Wno-long-long -S -o lambda-switch.s
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In member function
'void main()::A::f()':
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:15:6: error: case
label '4' not within a switch statement
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:16:8: error: break
statement not within loop or switch
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In lambda function:
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:21:6: error: case
label '3' not within a switch statement
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:22:8: error: break
statement not within loop or switch
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C: In function 'int
main()':
/source/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C:23:6: warning:
statement will never be executed [-Wswitch-unreachable]
compiler exited with status 1
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for errors, line
15)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for errors, line
16)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for warnings, line
19)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for errors, line
21)
PASS: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for errors, line
22)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C -std=c++14 (test for excess errors)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=slm --with-cpu=slm
>From gcc-bugs-return-581693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 13:01:01 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/31400] enable static linking of support libraries through -static-libXY
Date: Tue, 14 Nov 2017 13:01:00 -0000
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--- Comment #21 from janus at gcc dot gnu.org ---
(In reply to Matt Arsenault from comment #20)
> I would find the -static-libgomp option useful
+1
>From gcc-bugs-return-581694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 13:12:15 2017
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From: "matthijsvanduin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82989] New: Inexplicable use of NEON for 64-bit math
Date: Tue, 14 Nov 2017 13:12:00 -0000
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Bug ID: 82989
Summary: Inexplicable use of NEON for 64-bit math
Product: gcc
Version: 7.2.0
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The following function:
void foo( uint64_t *a ) {
*a += *a >> 32;
}
compiled with arm-linux-gnueabihf-gcc -mcpu=cortex-a8 -mfpu=neon -O2
produces the following code:
push {r4, r5}
ldrd r4, [r0]
vmov d16, r4, r5
vshr.u64 d16, d16, #32
vmov r2, r3, d16
adds r2, r2, r4
adcs r3, r3, r5
strd r2, [r0]
pop {r4, r5}
bx lr
Since -mneon-for-64bits is not enabled (I double-checked using -Q just to be
sure), the use of neon instructions here is highly unexpected.
(Moreover, shifting right by 32 bits should of course not involve any actual
arithmetic whatsoever. Ideally this function would compile to
ldrd r2, [r0]
adds r2, r2, r3
adcs r3, r3, #0
strd r2, [r0]
bx lr
)
>From gcc-bugs-return-581695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 13:23:31 2017
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Subject: [Bug c++/82988] [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C fail
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|libstdc++ |c++
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Nothing to do with libstdc++ though.
>From gcc-bugs-return-581696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 14:07:57 2017
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Tue, 14 Nov 2017 14:07:00 -0000
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--- Comment #2 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Hmm. I do think r254526 does the right thing (TM). Looking at
-ftree-dump-original the frontend doesn't generaty any logical(kind=1)
temporary variables. So presumably some optimization pass creates such a thing
and then it fails to make sure that type matches some logical(kind=4) variable
defines elsewhere (by the frontend, maybe).
I also checked with -fdump-tree-all, none of
gfortran -O3 realloc_on_assign_16.f90 -fdump-tree-all
gfortran -O3 -fno-tree-forwprop realloc_on_assign_16.f90 -fdump-tree-all
gfortran -O2 -fno-tree-forwprop realloc_on_assign_16.f90 -fdump-tree-all
had any logical(kind=1) variables in any of the tree dumps. It might be that
due to the ICE with "-O3 -fno-tree-forwprop" the culprit tree dump is never
generated.
>From gcc-bugs-return-581697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 14:10:54 2017
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Tue, 14 Nov 2017 14:10:00 -0000
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--- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Yes, the logical(kind=4) definitely comes from the frontend. If you compile
with -fdefault-integer-8 it changes to a logical(kind=8).
>From gcc-bugs-return-581698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 14:45:07 2017
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82990] New: Add -mprefer-vzeroupper
Date: Tue, 14 Nov 2017 14:45:00 -0000
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Bug ID: 82990
Summary: Add -mprefer-vzeroupper
Product: gcc
Version: 8.0
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Target: x86
Should we have a separate patch to add -mprefer-vzeroupper to cover all bases
in the future, like
/* opt_pass methods: */
virtual bool gate (function *)
{
return TARGET_AVX && (!TARGET_AVX512ER || TARGET_PREFER_VZEROUPPER)
&& TARGET_VZEROUPPER && flag_expensive_optimizations
&& !optimize_size;
}
Should explicit -mprefer-vzeroupper or -mno-prefer-vzeroupper override
whatever other optimization conditions there are (i.e. everything other than
TARGET_AVX and TARGET_VZEROUPPER)? I.e. use !TARGET_AVX512ER &&
flag_expensive_optimizations && !optimize_size only when the explicit bit is
not set for it?
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Subject: [Bug c++/82988] [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C fail
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82988
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-581700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 14:59:01 2017
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From: "BlenderEi at LwTV dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 14:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82985
--- Comment #2 from BlenderEi at LwTV dot de ---
Created attachment 42601
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42601&action=edit
This is an archive containing the preprocessed File that triggered the Bug
(FullSystemOptimize.ii) as well as my console history, because after I added
CMAKE_CXX_FLAGS "-save-temps" it compiles?!?!
Thank you for your fast reply.
Ok, I have no experience if this is correct, but what I did was:
Added this line to the CMakeLists.txt in the main directory "/dso":
set (CMAKE_CXX_FLAGS "-save-temps")
And with this, it actually compiled the code!!! o.O
But it definitely didnt work before. To prove that, I attached my console
history as well. You can see, that in the beginning the make-command failed.
After I changed the file, the compilation succeeded!
Naturally, now I am even more confused. Could you tell me if I missed a step? I
checked the instruction website you referred me to, but it didnt tell me how to
do this with cmake. So I googled and did my best. Maybe I did a mistake
(although, I don't think so).
If you need anything, please just let me know. Thanks a lot for your help!
>From gcc-bugs-return-581701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:09:11 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 15:09:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Normally, you could enable verbose output with something like "make VERBOSE=1".
And then add --save-temps to the failing gcc invocation by hand
(and also post the full invocation here).
Thanks. I can reproduce the issue with trunk:
% g++ -O3 -c FullSystemOptimize.ii
In file included from
/usr/include/boost/smart_ptr/enable_shared_from_this.hpp:16:0,
from /usr/include/boost/enable_shared_from_this.hpp:16,
from /usr/include/boost/thread/pthread/thread_data.hpp:17,
from /usr/include/boost/thread/thread_only.hpp:17,
from /usr/include/boost/thread/thread.hpp:12,
from /usr/include/boost/thread.hpp:13,
from /home/akp/dso/src/util/IndexThreadReduce.h:28,
from /home/akp/dso/src/FullSystem/FullSystem.h:39,
from /home/akp/dso/src/FullSystem/FullSystemOptimize.cpp:26:
/usr/include/boost/smart_ptr/weak_ptr.hpp: In constructor
‘boost::weak_ptr<T>::weak_ptr(boost::weak_ptr<T>&&)’:
/usr/include/boost/smart_ptr/weak_ptr.hpp:109:82: internal compiler error: tree
check: expected tree that contains ‘decl common’ structure, have
‘identifier_node’ in get_inner_reference, at expr.c:7003
weak_ptr( weak_ptr && r )
^
0x6adc65 tree_contains_struct_check_failed(tree_node const*,
tree_node_structure_enum, char const*, int, char const*)
/home/markus/gcc/gcc/tree.c:9268
0xb67738 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/home/markus/gcc/gcc/tree.h:3202
0xb67738 get_inner_reference(tree_node*, long*, long*, tree_node**,
machine_mode*, int*, int*, int*)
/home/markus/gcc/gcc/expr.c:7003
0xbaed4b fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*)
/home/markus/gcc/gcc/fold-const.c:7695
0xbb0189 fold_build1_loc(unsigned int, tree_code, tree_node*, tree_node*)
/home/markus/gcc/gcc/fold-const.c:12068
0x788a6c cp_fold_convert(tree_node*, tree_node*)
/home/markus/gcc/gcc/cp/cvt.c:607
0x966275 build_static_cast_1
/home/markus/gcc/gcc/cp/typeck.c:6856
0x9669b4 build_static_cast(tree_node*, tree_node*, int)
/home/markus/gcc/gcc/cp/typeck.c:7078
0x87a55e cp_parser_postfix_expression
/home/markus/gcc/gcc/cp/parser.c:6696
0x87d08a cp_parser_unary_expression
/home/markus/gcc/gcc/cp/parser.c:8363
0x85a186 cp_parser_cast_expression
/home/markus/gcc/gcc/cp/parser.c:9131
0x85a9f7 cp_parser_binary_expression
/home/markus/gcc/gcc/cp/parser.c:9232
0x85c3d4 cp_parser_assignment_expression
/home/markus/gcc/gcc/cp/parser.c:9519
0x85e7f6 cp_parser_parenthesized_expression_list
/home/markus/gcc/gcc/cp/parser.c:7822
0x880e90 cp_parser_mem_initializer
/home/markus/gcc/gcc/cp/parser.c:14548
0x880e90 cp_parser_mem_initializer_list
/home/markus/gcc/gcc/cp/parser.c:14434
0x880e90 cp_parser_ctor_initializer_opt
/home/markus/gcc/gcc/cp/parser.c:14405
0x880e90 cp_parser_ctor_initializer_opt_and_function_body
/home/markus/gcc/gcc/cp/parser.c:21859
0x883866 cp_parser_function_definition_after_declarator
/home/markus/gcc/gcc/cp/parser.c:26765
0x884abc cp_parser_late_parsing_for_member
/home/markus/gcc/gcc/cp/parser.c:27645
I will try to reduced it.
>From gcc-bugs-return-581702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:15:06 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 15:15:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #3)
> Normally, you could enable verbose output with something like "make
> VERBOSE=1".
> And then add --save-temps to the failing gcc invocation by hand
> (and also post the full invocation here).
>
> Thanks. I can reproduce the issue with trunk:
Nope, that issue was already fixed yesterday: PR82360.
>From gcc-bugs-return-581703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:18:48 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82187] missed PRE at -O3
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
PRE thinks we are creating a loop-carried dependence that might prevent
vectorization (which is enabled at -O3) thus it doesn't perform the transform.
So it's a feature ...
>From gcc-bugs-return-581704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:38:28 2017
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From: "BlenderEi at LwTV dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 15:38:00 -0000
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--- Comment #5 from BlenderEi at LwTV dot de ---
Wow, ok nice. So my issue is solved?
This would be amazing. Thank you for your help in that case.
I will leave the status as is, because I am not the one that should decide
about the status with my little experience.
Have a great week, in case we are finished here. Kind regards!
>From gcc-bugs-return-581705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:44:51 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 15:44:00 -0000
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to BlenderEi from comment #5)
> Wow, ok nice. So my issue is solved?
>
> This would be amazing. Thank you for your help in that case.
>
> I will leave the status as is, because I am not the one that should decide
> about the status with my little experience.
>
> Have a great week, in case we are finished here. Kind regards!
No, sorry for the misunderstanding.
The issue that I was seeing was a gcc-8 only regression.
It has nothing to do with your issue. So we are back to square one.
Please post the full gcc invocation and output with -v --save-temps.
>From gcc-bugs-return-581706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 15:57:24 2017
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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is obsolete| |
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42602
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gcc8-pr82981.patch
Updated untested patch.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82991] New: memcpy and strcpy return value can be assumed to be equal to first argument
Date: Tue, 14 Nov 2017 16:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82991
Bug ID: 82991
Summary: memcpy and strcpy return value can be assumed to be
equal to first argument
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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Reporter: msebor at gcc dot gnu.org
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I noticed another even more straightforward optimization opportunity that the
one pointed out in pr82665. The test case below shows that GCC knows that
stpcpy(p, s) returns p + strlen(s) but it doesn't "know" that strcpy(p, s)
returns p, or that memcmpy(p, s, n) also returns p.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout c.c
void f1 (char *p)
{
char *q = __builtin_stpcpy (p, "123");
unsigned n = q - p;
if (n != 3) // eliminated
__builtin_abort ();
}
void f2 (char *p)
{
char *q = __builtin_strcpy (p, "123");
unsigned n = q - p;
if (n) // not eliminated
__builtin_abort ();
}
void f3 (char *p, const char *s)
{
char *q = __builtin_memcpy (p, s, 3);
unsigned n = q - p;
if (n) // not eliminated
__builtin_abort ();
}
;; Function f1 (f1, funcdef_no=0, decl_uid=1891, cgraph_uid=0, symbol_order=0)
f1 (char * p)
{
<bb 2> [local count: 10000]:
__builtin_memcpy (p_2(D), "123", 4); [tail call]
return;
}
;; Function f2 (f2, funcdef_no=1, decl_uid=1896, cgraph_uid=1, symbol_order=1)
f2 (char * p)
{
unsigned int n;
char * q;
long int q.2_1;
long int p.3_2;
long int _3;
<bb 2> [local count: 10000]:
q_7 = __builtin_memcpy (p_5(D), "123", 4);
q.2_1 = (long int) q_7;
p.3_2 = (long int) p_5(D);
_3 = q.2_1 - p.3_2;
n_8 = (unsigned int) _3;
if (n_8 != 0)
goto <bb 3>; [0.04%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 9996]:
return;
}
;; Function f3 (f3, funcdef_no=2, decl_uid=1902, cgraph_uid=2, symbol_order=2)
f3 (char * p, const char * s)
{
unsigned int n;
char * q;
long int q.4_1;
long int p.5_2;
long int _3;
<bb 2> [local count: 10000]:
q_8 = __builtin_memcpy (p_5(D), s_6(D), 3);
q.4_1 = (long int) q_8;
p.5_2 = (long int) p_5(D);
_3 = q.4_1 - p.5_2;
n_9 = (unsigned int) _3;
if (n_9 != 0)
goto <bb 3>; [0.04%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 9996]:
return;
}
>From gcc-bugs-return-581708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 16:41:06 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 16:41:00 -0000
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--- Comment #7 from BlenderEi at LwTV dot de ---
Created attachment 42603
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42603&action=edit
This is the verbose output with the CMAKE flag 'set (CMAKE_CXX_FLAGS "-v
--save-temps")'
Ok, in that case I hope I understood what you need. See the attached archive.
Typing "make -VERBOSE=1" didn't achieve anything but displaying the help text.
Therefore, again I tried the CMAKE variant.
Note: My gcc version is a little different I noticed, but I was confirmed that
7.2.1 is affected by this bug too.
Please tell me if you need something else.
>From gcc-bugs-return-581709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 16:49:39 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 16:49:00 -0000
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--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
OK. I need:
> git clone https://github.com/JakobEngel/dso.git
> sudo apt-get install libsuitesparse-dev libeigen3-dev libboost-all-dev
> cd dso
> mkdir build
> cd build
> cmake ..
> make VERBOSE=1
Then add -v --save-temps to the gcc invocation that hits the internal compiler
error.
And then please paste the full output of that invocation here.
>From gcc-bugs-return-581710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:13:24 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 17:13:00 -0000
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--- Comment #9 from BlenderEi at LwTV dot de ---
Created attachment 42604
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Output of command "make VERBOSE=1" with altered makefile with additional flags
which invokes the compiler to crash
Oh ok. Sorry for this taking so long. If I didnt misunderstand you, I got it
now.
I have now executed:
> make VERBOSE=1
after I changed the Makefile (generated by CMake) by adding the flags (-v
--save-temps) inbetween "/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES)
$(CXX_FLAGS)" and "-o
CMakeFiles/dso.dir/src/FullSystem/FullSystemOptimize.cpp.o -c
/home/akp/dso/src/FullSystem/FullSystemOptimize.cpp" (because building the
"FullSystemOptimize" object seems to be the reason for the crash).
What do you say, is this useful?
>From gcc-bugs-return-581711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:16:23 2017
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Subject: [Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument
Date: Tue, 14 Nov 2017 17:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC tracks that fact, see gimple_call_return_flags ERF_RETURNS_ARG and
ERF_RETURN_ARG_MASK to say which argument it is.
>From what I can see, it is used during aliasing and vrp (in the latter case
only whether it is non-NULL or not). So it is just a matter of using it in
further optimizations. But it needs to be used with care.
Trying to optimize:
return strcpy (x, y);
as
strcpy (x, y);
return x;
is not a good idea, it would make it not tail-call optimizable, and in many
cases even for RA purposes it is cheaper to read the value from the return
register rather than saving it in call saved register and restoring from there,
etc. Which is why it is not that strightforward to say do it in SCCVN.
>From gcc-bugs-return-581712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:23:34 2017
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Subject: [Bug target/82990] Add -mprefer-vzeroupper
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
We would like -mprefer-vzeroupper default to on and -mtune=knl should
override it.
>From gcc-bugs-return-581713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:24:19 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
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Ahmad Fatoum <ahmad at a3f dot at> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Ahmad Fatoum <ahmad at a3f dot at> ---
(In reply to BlenderEi from comment #9)
> What do you say, is this useful?
Hi Adam,
--save-temps saves some temporary files (
>From gcc-bugs-return-581714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:25:41 2017
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--- Comment #11 from Ahmad Fatoum <ahmad at a3f dot at> ---
(In reply to Ahmad Fatoum from comment #10)
> (In reply to BlenderEi from comment #9)
> > What do you say, is this useful?
>
> Hi Adam,
>
> --save-temps saves some temporary files (
*.i, *.s, *.o) which might be useful as well.
>From gcc-bugs-return-581715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:31:05 2017
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Subject: [Bug fortran/82992] New: ICE in create_int_parameter_array, at fortran/module.c:6586
Date: Tue, 14 Nov 2017 17:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82992
Bug ID: 82992
Summary: ICE in create_int_parameter_array, at
fortran/module.c:6586
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
With invalid code :
$ cat z1.f90
subroutine sub (x)
use iso_fortran_env, only: x => character_kinds
end
$ gfortran-8-20171112 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x6ca002 create_int_parameter_array
../../gcc/fortran/module.c:6586
0x6caaf3 use_iso_fortran_env_module
../../gcc/fortran/iso-fortran-env.def:100
0x6cffb7 gfc_use_module
../../gcc/fortran/module.c:6938
0x6d1636 gfc_use_modules()
../../gcc/fortran/module.c:7178
0x6df7dc use_modules
../../gcc/fortran/parse.c:114
0x6e3494 decode_statement
../../gcc/fortran/parse.c:332
0x6e5354 next_free
../../gcc/fortran/parse.c:1225
0x6e5354 next_statement
../../gcc/fortran/parse.c:1457
0x6e6c3c parse_spec
../../gcc/fortran/parse.c:3834
0x6e9133 parse_progunit
../../gcc/fortran/parse.c:5637
0x6eaa04 gfc_parse_file()
../../gcc/fortran/parse.c:6184
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-581716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:34:24 2017
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Subject: [Bug fortran/82993] New: ICE free_expr0, at fortran/expr.c:445
Date: Tue, 14 Nov 2017 17:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82993
Bug ID: 82993
Summary: ICE free_expr0, at fortran/expr.c:445
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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With a wrong parameter definition :
$ cat z1.f90
program p
type t
real :: a(3)
end type
type(t), parameter :: z = 1
print *, z%a(1)
print *, z%a
end
$ gfortran-8-20171112 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x69268b free_expr0
../../gcc/fortran/expr.c:445
0x6926ad gfc_free_expr(gfc_expr*)
../../gcc/fortran/expr.c:518
0x6efd59 gfc_match_rvalue(gfc_expr**)
../../gcc/fortran/primary.c:3250
0x6c655e match_primary
../../gcc/fortran/matchexp.c:157
0x6c655e match_level_1
../../gcc/fortran/matchexp.c:211
0x6c655e match_mult_operand
../../gcc/fortran/matchexp.c:267
0x6c67a8 match_add_operand
../../gcc/fortran/matchexp.c:356
0x6c6a3c match_level_2
../../gcc/fortran/matchexp.c:480
0x6c6b92 match_level_3
../../gcc/fortran/matchexp.c:551
0x6c6ca4 match_level_4
../../gcc/fortran/matchexp.c:599
0x6c6ca4 match_and_operand
../../gcc/fortran/matchexp.c:693
0x6c6e62 match_or_operand
../../gcc/fortran/matchexp.c:722
0x6c6f52 match_equiv_operand
../../gcc/fortran/matchexp.c:765
0x6c7042 match_level_5
../../gcc/fortran/matchexp.c:811
0x6c63b1 gfc_match_expr(gfc_expr**)
../../gcc/fortran/matchexp.c:870
0x6af7a9 match_io_element
../../gcc/fortran/io.c:3542
0x6af9f3 match_io_list
../../gcc/fortran/io.c:3581
0x6b4214 match_io
../../gcc/fortran/io.c:4242
0x6b592a gfc_match_print()
../../gcc/fortran/io.c:4298
>From gcc-bugs-return-581717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:35:26 2017
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Subject: [Bug fortran/82993] ICE in free_expr0, at fortran/expr.c:445
Date: Tue, 14 Nov 2017 17:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82993
G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ICE free_expr0, at |ICE in free_expr0, at
|fortran/expr.c:445 |fortran/expr.c:445
--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Similar tests :
$ cat z3.f90
program p
type t
integer :: a(3)
end type
type(t), parameter :: z = 1.0
print *, z%a(1)
print *, z%a
end
$ cat z5.f90
program p
type t
real :: a(3)
end type
type(t), parameter :: z = '1'
print *, z%a(1)
print *, z%a
end
$ cat z6.f90
program p
type t
real :: a(3)
end type
type(t), parameter :: z = .true.
print *, z%a(1)
print *, z%a
end
>From gcc-bugs-return-581718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:37:33 2017
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78619] [6/7/8 Regression] ICE in copy_reference_ops_from_ref, at tree-ssa-sccvn.c:889
Date: Tue, 14 Nov 2017 17:37:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on 6-, 7- and 8-branches.
Thanks for the report.
Paul
>From gcc-bugs-return-581719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:39:15 2017
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Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
Date: Tue, 14 Nov 2017 17:39:00 -0000
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Nov 14 17:38:38 2017
New Revision: 254733
URL: https://gcc.gnu.org/viewcvs?rev=254733&root=gcc&view=rev
Log:
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/82934
* trans-stmt.c (gfc_trans_allocate): Remove the gcc_assert on
null string length for assumed length typespec and set
expr3_esize to NULL_TREE;
2017-11-13 Paul Thomas <pault@gcc.gnu.org>
Backport from trunk
PR fortran/82934
* gfortran.dg/allocate_assumed_charlen_1.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/allocate_assumed_charlen_1.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/trans-stmt.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:39:18 2017
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Subject: [Bug fortran/82994] New: ICE in gfc_match_deallocate, at fortran/match.c:4478
Date: Tue, 14 Nov 2017 17:39:00 -0000
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Bug ID: 82994
Summary: ICE in gfc_match_deallocate, at fortran/match.c:4478
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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With invalid code (no pointer/allocatable attribute, nor allocated) :
$ cat z1.f90
program p
type t
end type
class(t) :: x
deallocate (x)
end
$ gfortran-8-20171112 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb61c7f crash_signal
../../gcc/toplev.c:325
0x6c33e3 gfc_match_deallocate()
../../gcc/fortran/match.c:4478
0x6dfe69 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6e48af match_word
../../gcc/fortran/parse.c:466
0x6e48af decode_statement
../../gcc/fortran/parse.c:466
0x6e5354 next_free
../../gcc/fortran/parse.c:1225
0x6e5354 next_statement
../../gcc/fortran/parse.c:1457
0x6e6c3c parse_spec
../../gcc/fortran/parse.c:3834
0x6e9133 parse_progunit
../../gcc/fortran/parse.c:5637
0x6ea6f4 gfc_parse_file()
../../gcc/fortran/parse.c:6177
0x72f13f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-581721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:39:56 2017
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Subject: [Bug fortran/82994] ICE in gfc_match_deallocate, at fortran/match.c:4478
Date: Tue, 14 Nov 2017 17:39:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Now allocated, but still not declared allocatable :
(here gcc-chk was configured with --enable-checking=yes)
$ cat z2.f90
program p
type t
end type
class(t) :: x
allocate (x)
deallocate (x)
end
$ gfortran-8-20171112-chk -c z2.f90
z2.f90:5:13:
allocate (x)
1
Error: Allocate-object at (1) is neither a data pointer nor an allocatable
variable
f951: internal compiler error: Segmentation fault
0xcaca2f crash_signal
../../gcc/toplev.c:325
0x6ee643 gfc_match_deallocate()
../../gcc/fortran/match.c:4478
0x70b309 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x70fd4f match_word
../../gcc/fortran/parse.c:466
0x70fd4f decode_statement
../../gcc/fortran/parse.c:466
0x7107f4 next_free
../../gcc/fortran/parse.c:1225
0x7107f4 next_statement
../../gcc/fortran/parse.c:1457
0x7120dc parse_spec
../../gcc/fortran/parse.c:3834
0x7145d3 parse_progunit
../../gcc/fortran/parse.c:5637
0x715b94 gfc_parse_file()
../../gcc/fortran/parse.c:6177
0x75b20f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-581722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:42:44 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 17:42:00 -0000
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--- Comment #12 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to BlenderEi from comment #9)
> Created attachment 42604 [details]
> Output of command "make VERBOSE=1" with altered makefile with additional
> flags which invokes the compiler to crash
>
> Oh ok. Sorry for this taking so long. If I didnt misunderstand you, I got it
> now.
>
> I have now executed:
> > make VERBOSE=1
> after I changed the Makefile (generated by CMake) by adding the flags (-v
> --save-temps) inbetween "/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES)
> $(CXX_FLAGS)" and "-o
> CMakeFiles/dso.dir/src/FullSystem/FullSystemOptimize.cpp.o -c
> /home/akp/dso/src/FullSystem/FullSystemOptimize.cpp" (because building the
> "FullSystemOptimize" object seems to be the reason for the crash).
>
> What do you say, is this useful?
Yes, thank you. Can you please attach the FullSystemOptimize.ii file (again)?
>From gcc-bugs-return-581723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:57:43 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 17:57:00 -0000
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--- Comment #13 from BlenderEi at LwTV dot de ---
Created attachment 42605
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42605&action=edit
FullSystemOptimize.ii and FullSystemOptimize.s files - those are the only ones
I got from the last command
Oh yeah, of course.
I only have the two generated files .ii and .s of one .cpp file. Nothing else
is there in the build directory (as opposed to last time, when the compilation
was successful).
I have attached them.
>From gcc-bugs-return-581724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 17:58:55 2017
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Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
Date: Tue, 14 Nov 2017 17:58:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-14
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
My instrumented compiler gives
../../work/gcc/fortran/module.c:6586:18: runtime error: null pointer passed as
argument 2, which is declared to never be null
>From gcc-bugs-return-581725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:03:01 2017
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Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #14 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Thank you. I can reproduce the issue now.
Reducing...
>From gcc-bugs-return-581726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:04:54 2017
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Subject: [Bug fortran/82993] ICE in free_expr0, at fortran/expr.c:445
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
>From gcc-bugs-return-581727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:05:59 2017
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Subject: [Bug fortran/82896] probably pointer assignement bug in gfortran compiler version 7.2.0
Date: Tue, 14 Nov 2017 18:05:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |pault at gcc dot gnu.org
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
I cannot reproduce the bug on any of the current 6-, 7- or 8-branches.
I assume that "friendly fire" in fixing another bug has killed this one. I have
been doing a fair amount of general work in this area, so I assume that it was
me but, I am sorry, I don't have time to retrace my steps and find which fix
did the job.
If it is a specific Mingw problem, please reopen the Bug report.
Thanks for reporting this and sorry if it is causing you some difficulty.
Best regards
Paul
>From gcc-bugs-return-581728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:08:31 2017
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Subject: [Bug fortran/82994] ICE in gfc_match_deallocate, at fortran/match.c:4478
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
My instrumented compiler gives
../../work/gcc/fortran/match.c:4473:7: runtime error: member access within null
pointer of type 'struct gfc_component'
>From gcc-bugs-return-581729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:12:02 2017
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Subject: [Bug fortran/82934] [6/7/8 Regression] Segfault on assumed character length in allocate
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
This is now fixed on all three branches.
Thanks to self for reporting it :-)
Paul
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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--- Comment #7 from Jim Wilson <wilson at gcc dot gnu.org> ---
if (GET_MODE_2XWIDER_MODE (mode).exists (&wmode)
&& targetm.scalar_mode_supported_p (wmode))
This test succeeds, and then in expand_expr WIDEN_MULT_EXPR the checks for a
mult widen optab entry fails, so it gnerates a TImode multiply, which is a
libcall.
>From gcc-bugs-return-581731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:29:03 2017
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--- Comment #15 from BlenderEi at LwTV dot de ---
I admire your positivity, Markus ;)
Good luck!
>From gcc-bugs-return-581732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:41:30 2017
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Subject: [Bug c++/77369] incorrect noexcept specification deduction
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-581733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 18:43:47 2017
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Subject: [Bug fortran/82993] ICE in free_expr0, at fortran/expr.c:445
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kargl at gcc dot gnu.org changed:
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CC| |kargl at gcc dot gnu.org
--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to G. Steinmetz from comment #0)
> With a wrong parameter definition :
>
> $ cat z1.f90
> program p
> type t
> real :: a(3)
> end type
> type(t), parameter :: z = 1
> print *, z%a(1)
> print *, z%a
> end
>
>
> $ gfortran-8-20171112 -c z1.f90
> f951: internal compiler error: Segmentation fault
> 0xb61c7f crash_signal
> ../../gcc/toplev.c:325
> 0x69268b free_expr0
> ../../gcc/fortran/expr.c:445
> 0x6926ad gfc_free_expr(gfc_expr*)
> ../../gcc/fortran/expr.c:518
> 0x6efd59 gfc_match_rvalue(gfc_expr**)
> ../../gcc/fortran/primary.c:3250
> 0x6c655e match_primary
> ../../gcc/fortran/matchexp.c:157
> 0x6c655e match_level_1
> ../../gcc/fortran/matchexp.c:211
> 0x6c655e match_mult_operand
> ../../gcc/fortran/matchexp.c:267
> 0x6c67a8 match_add_operand
> ../../gcc/fortran/matchexp.c:356
> 0x6c6a3c match_level_2
> ../../gcc/fortran/matchexp.c:480
> 0x6c6b92 match_level_3
> ../../gcc/fortran/matchexp.c:551
> 0x6c6ca4 match_level_4
> ../../gcc/fortran/matchexp.c:599
> 0x6c6ca4 match_and_operand
> ../../gcc/fortran/matchexp.c:693
> 0x6c6e62 match_or_operand
> ../../gcc/fortran/matchexp.c:722
> 0x6c6f52 match_equiv_operand
> ../../gcc/fortran/matchexp.c:765
> 0x6c7042 match_level_5
> ../../gcc/fortran/matchexp.c:811
> 0x6c63b1 gfc_match_expr(gfc_expr**)
> ../../gcc/fortran/matchexp.c:870
> 0x6af7a9 match_io_element
> ../../gcc/fortran/io.c:3542
> 0x6af9f3 match_io_list
> ../../gcc/fortran/io.c:3581
> 0x6b4214 match_io
> ../../gcc/fortran/io.c:4242
> 0x6b592a gfc_match_print()
> ../../gcc/fortran/io.c:4298
Ugh. This one is real ugly. :(
If both print statement are commented out, one gets
% gfcx -c a.f90
a.f90:5:28:
type(t), parameter :: z = 1
1
Error: Incompatible derived type in PARAMETER at (1)
a.f90:5:28:
type(t), parameter :: z = 1
1
Error: Can't convert INTEGER(4) to TYPE(t) at (1)
This is the good news!
If the first print statement is uncomment, we get Gerhard's
trace above. If the first print is again commented out and
the second statement is uncommented, we get
% gfcx -c a.f90
a.f90:5:28:
type(t), parameter :: z = 1
1
Error: Incompatible derived type in PARAMETER at (1)
a.f90:5:28:
type(t), parameter :: z = 1
1
Error: Can't convert INTEGER(4) to TYPE(t) at (1)
(null):0: confused by earlier errors, bailing out
AFAICT, when the statement "type(t), parameter :: z = 1"
is rejected, the gfc_expr for z = 1 is not properly freed.
I see
(gdb) p *p
$8 = {op = EXEC_ASSIGN, block = 0x0, next = 0x0, loc = {nextc = 0x0,
lb = 0x0}, here = 0x0, label1 = 0x0, label2 = 0x0, label3 = 0x0,
symtree = 0x0, expr1 = 0x201d837e0, expr2 = 0x0, expr3 = 0x0, expr4 = 0x0,
resolved_sym = 0x0, resolved_isym = 0x0, ext = {actual = 0x0,
iterator = 0x0, alloc = {ts = {type = BT_UNKNOWN, kind = 0, u = {
derived = 0x0, cl = 0x0, pad = 0}, interface = 0x0,
is_c_interop = 0, is_iso_c = 0, f90_type = BT_UNKNOWN,
deferred = false, interop_kind = 0x0}, list = 0x0,
arr_spec_from_expr3 = 0}, block = {ns = 0x0, assoc = 0x0,
case_list = 0x0}, open = 0x0, close = 0x0, filepos = 0x0, inquire = 0x0,
wait = 0x0, dt = 0x0, forall_iterator = 0x0, which_construct = 0x0,
stop_code = 0, entry = 0x0, oacc_declare = 0x0, omp_clauses = 0x0,
omp_name = 0x0, omp_namelist = 0x0, omp_bool = false,
omp_atomic = GFC_OMP_ATOMIC_UPDATE}, cycle_label = 0x0, exit_label = 0x0}
(gdb) p *p->expr1
$3 = {expr_type = EXPR_FUNCTION, ts = {type = BT_UNKNOWN, kind = 0, u = {
derived = 0x0, cl = 0x0, pad = 0}, interface = 0x0, is_c_interop = 0,
is_iso_c = 0, f90_type = BT_UNKNOWN, deferred = false,
interop_kind = 0x0}, rank = 0, shape = 0x0, symtree = 0x201d805d0,
ref = 0x0, where = {nextc = 0x201dc50cc, lb = 0x201dc50a0}, base_expr = 0x0,
is_boz = 0, is_snan = 0, error = 0, user_operator = 0, mold = 0,
must_finalize = 0, representation = {length = 0, string = 0x0}, value = {
logical = 30934528, iokind = 30934528, integer = {{_mp_alloc = 30934528,
_mp_size = 2, _mp_d = 0x0}}, real = {{_mpfr_prec = 8620869120,
_mpfr_sign = 0, _mpfr_exp = 0, _mpfr_d = 0x0}}, complex = {{re = {{
_mpfr_prec = 8620869120, _mpfr_sign = 0, _mpfr_exp = 0,
_mpfr_d = 0x0}}, im = {{_mpfr_prec = 0, _mpfr_sign = 0,
_mpfr_exp = 0, _mpfr_d = 0x0}}}}, op = {op = 30934528, uop = 0x0,
op1 = 0x0, op2 = 0x0}, function = {actual = 0x201d80600, name = 0x0,
isym = 0x0, esym = 0x0}, compcall = {actual = 0x201d80600, name = 0x0,
base_object = 0x0, tbp = 0x0, ignore_pass = 0, assign = 0}, character = {
length = 30934528, string = 0x0}, constructor = 0x201d80600},
where p->expr1 loos like garbage on the stack.
>From gcc-bugs-return-581734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 19:17:37 2017
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Subject: [Bug fortran/82995] New: Segmentation fault passing optional argument to intrinsic sum function
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Bug ID: 82995
Summary: Segmentation fault passing optional argument to
intrinsic sum function
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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With gfortran 7.2 on linux the following code gives a segmentation fault on the
output line starting "C2". Some earlier versions (before 4.9) give the answer
'0' instead.
module y
implicit none
contains
function test_sum(input,mask)
integer, intent(in) :: input(:)
logical, intent(in), optional :: mask(:)
integer :: test_sum
if(present(mask)) then
test_sum = sum(input,mask)
else
test_sum = sum(input)
endif
end function test_sum
function my_sum(input,mask)
integer, intent(in) :: input(:)
logical, intent(in), optional :: mask(:)
integer :: my_sum
my_sum = sum(input,mask)
end function my_sum
end module y
program test_my_sum
use y, only: my_sum, test_sum
implicit none
integer :: input(3) = [1,2,3]
logical :: mask(3) = [.true.,.false.,.true.]
! This works:
write(*,*) 'A1: ', sum(input)
write(*,*) 'A2: ', sum(input,mask)
! This works:
write(*,*) 'B1: ', test_sum(input)
write(*,*) 'B2: ', test_sum(input,mask)
! This works:
write(*,*) 'C1: ', my_sum(input,[.true.,.true.,.true.])
! Segmentation fault, or answer '0':
write(*,*) 'C2: ', my_sum(input)
end program test_my_sum
>From gcc-bugs-return-581735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 19:44:59 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82995] Segmentation fault passing optional argument to intrinsic sum function
Date: Tue, 14 Nov 2017 19:44:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-14
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
IMO the code is invalid: you cannot call my_sum with only one argument. I get a
segfault for all the revision I have tested from 4.8 up to trunk (8.0), except
with my instrumented trunk for which I get 0.
I am a little bit surprised that the mismatch between caller and callee is not
detected, but I think a compiler does have to (I did not look at the standard
legalese).
>From gcc-bugs-return-581736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 20:01:22 2017
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Subject: [Bug c++/82959] g++ doesn't appreciate C++17 evaluation order rules for overloaded operators
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Mukesh Kapoor <mukesh.kapoor at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mukesh.kapoor at oracle dot com
--- Comment #2 from Mukesh Kapoor <mukesh.kapoor at oracle dot com> ---
Here is a reduced test case that shows the same problem:
extern "C" int printf(const char*, ...);
class Int {
public:
bool operator&&(const Int& rhs) const { return val && rhs.val; }
private:
int val = 0;
};
int main()
{
Int xx;
(printf("first\n"), xx) && (printf("second\n"), xx);
};
>From gcc-bugs-return-581737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 20:17:38 2017
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Subject: [Bug c++/82836] [8 Regression] ICE on valid code
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Tue, 14 Nov 2017 20:21:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
So for following GIMPLE stmt:
$ (gdb) p debug_gimple_stmt(stmt)
_54 = 0;
RHS (kind == 1) is created here:
(gdb) bt
#0 make_int_cst (len=1, ext_len=1) at ../../gcc/tree.c:2286
#1 0x000000000139516a in build_new_int_cst (type=0x7ffff6827b28, cst=...) at
../../gcc/tree.c:1280
#2 0x0000000001395ef3 in wide_int_to_tree (type=0x7ffff6827b28, pcst=...) at
../../gcc/tree.c:1529
#3 0x0000000001010b84 in set_min_and_max_values_for_integral_type
(type=0x7ffff6827b28, precision=8, sgn=UNSIGNED) at
../../gcc/stor-layout.c:2680
#4 0x0000000001010cfa in fixup_unsigned_type (type=0x7ffff6827b28) at
../../gcc/stor-layout.c:2711
#5 0x0000000001010016 in make_unsigned_type (precision=8) at
../../gcc/stor-layout.c:2538
#6 0x00000000013b4983 in build_common_tree_nodes (signed_char=false) at
../../gcc/tree.c:9562
#7 0x000000000091167e in gfc_init_decl_processing () at
../../gcc/fortran/f95-lang.c:506
#8 0x0000000000910f2a in gfc_init () at ../../gcc/fortran/f95-lang.c:242
#9 0x0000000001020600 in lang_dependent_init (name=0x7fffffffe202
"/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/realloc_on_assign_16.f90")
at ../../gcc/toplev.c:1819
#10 0x0000000001020b37 in do_compile () at ../../gcc/toplev.c:2045
#11 0x0000000001020e84 in toplev::main (this=0x7fffffffdc6e, argc=16,
argv=0x7fffffffdd68) at ../../gcc/toplev.c:2194
#12 0x0000000001c3e1d2 in main (argc=16, argv=0x7fffffffdd68) at
../../gcc/main.c:39
LHS here:
(gdb) bt
#0 make_ssa_name_fn (fn=0x7ffff69c10b0, var=0x7ffff6833348,
stmt=0x7ffff662aa00, version=0) at ../../gcc/tree-ssanames.c:313
#1 0x00000000012ee868 in copy_ssa_name_fn (fn=0x7ffff69c10b0,
name=0x7ffff661a750, stmt=0x7ffff662aa00) at ../../gcc/tree-ssanames.c:691
#2 0x00000000012eeccf in duplicate_ssa_name_fn (fn=0x7ffff69c10b0,
name=0x7ffff661a750, stmt=0x7ffff662aa00) at ../../gcc/tree-ssanames.c:752
#3 0x00000000010dc1a0 in duplicate_ssa_name (var=0x7ffff661a750,
stmt=0x7ffff662aa00) at ../../gcc/tree-ssanames.h:134
#4 0x00000000010e3605 in create_new_def_for (old_name=0x7ffff661a750,
stmt=0x7ffff662aa00, def=0x7ffff662aa40) at ../../gcc/tree-into-ssa.c:2949
#5 0x0000000001079665 in gimple_duplicate_bb (bb=0x7ffff661bea0) at
../../gcc/tree-cfg.c:6186
#6 0x0000000000a76d6c in duplicate_block (bb=0x7ffff661bea0, e=0x0, after=0x0)
at ../../gcc/cfghooks.c:1077
#7 0x00000000012cc659 in create_block_for_threading (bb=0x7ffff661bea0,
rd=0x2a8c950, count=0, duplicate_blocks=0x7fffffffd6e0) at
../../gcc/tree-ssa-threadupdate.c:336
#8 0x00000000012cde44 in ssa_create_duplicates (slot=0x2c3be30,
local_info=0x7fffffffd6d0) at ../../gcc/tree-ssa-threadupdate.c:1124
#9 0x00000000012d182d in hash_table<redirection_data,
xcallocator>::traverse_noresize<ssa_local_info_t*,
&(ssa_create_duplicates(redirection_data**, ssa_local_info_t*))>
(this=0x2c3bdf0, argument=0x7fffffffd6d0) at ../../gcc/hash-table.h:969
#10 0x00000000012d0d0f in hash_table<redirection_data,
xcallocator>::traverse<ssa_local_info_t*,
&(ssa_create_duplicates(redirection_data**, ssa_local_info_t*))>
(this=0x2c3bdf0, argument=0x7fffffffd6d0) at ../../gcc/hash-table.h:990
#11 0x00000000012ce4e0 in thread_block_1 (bb=0x7ffff661bea0, noloop_only=true,
joiners=false) at ../../gcc/tree-ssa-threadupdate.c:1387
#12 0x00000000012ce5b6 in thread_block (bb=0x7ffff661bea0, noloop_only=true) at
../../gcc/tree-ssa-threadupdate.c:1431
#13 0x00000000012d03a4 in thread_through_all_blocks
(may_peel_loop_headers=false) at ../../gcc/tree-ssa-threadupdate.c:2298
#14 0x00000000011afcb9 in (anonymous namespace)::pass_dominator::execute
(this=0x2aa0470, fun=0x7ffff69c10b0) at ../../gcc/tree-ssa-dom.c:749
#15 0x0000000000ef7b1f in execute_one_pass (pass=0x2aa0470) at
../../gcc/passes.c:2497
#16 0x0000000000ef7e70 in execute_pass_list_1 (pass=0x2aa0470) at
../../gcc/passes.c:2586
#17 0x0000000000ef7ea1 in execute_pass_list_1 (pass=0x2a9e270) at
../../gcc/passes.c:2587
#18 0x0000000000ef7ef9 in execute_pass_list (fn=0x7ffff69c10b0, pass=0x2a9e090)
at ../../gcc/passes.c:2597
#19 0x0000000000ab8076 in cgraph_node::expand (this=0x7ffff69d3170) at
../../gcc/cgraphunit.c:2139
#20 0x0000000000ab86b2 in expand_all_functions () at
../../gcc/cgraphunit.c:2275
#21 0x0000000000ab9206 in symbol_table::compile (this=0x7ffff6817100) at
../../gcc/cgraphunit.c:2623
#22 0x0000000000ab947b in symbol_table::finalize_compilation_unit
(this=0x7ffff6817100) at ../../gcc/cgraphunit.c:2716
#23 0x000000000101e4c8 in compile_file () at ../../gcc/toplev.c:480
#24 0x0000000001020b97 in do_compile () at ../../gcc/toplev.c:2059
#25 0x0000000001020e84 in toplev::main (this=0x7fffffffdc6e, argc=16,
argv=0x7fffffffdd68) at ../../gcc/toplev.c:2194
#26 0x0000000001c3e1d2 in main (argc=16, argv=0x7fffffffdd68) at
../../gcc/main.c:39
Is it helpful information, or should I investigate more?
Which is the problematic type?
>From gcc-bugs-return-581739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 20:23:43 2017
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82996] New: ICE and segfault with derived type finalization
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Bug ID: 82996
Summary: ICE and segfault with derived type finalization
Product: gcc
Version: 6.4.1
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I'm going to give 3 examples. The first gives a spurious run time segfault. The
others are attempts to work around the problem, but give an internal compiler
error. These all work fine with the Intel and NAG compilers.
The first example:
module mod
type foo
integer, pointer :: f(:) => null()
contains
final :: foo_destroy
end type
type bar
type(foo) :: b(2)
end type
contains
elemental subroutine foo_destroy(this)
type(foo), intent(inout) :: this
if (associated(this%f)) deallocate(this%f)
end subroutine
end module
program main
use mod
type(bar) :: x
call sub(x)
contains
subroutine sub(x)
type(bar), intent(out) :: x
end subroutine
end program
And the output from running the executable:
$ gfortran -g gfortran-bug-20171114a.f90
$ ./a.out
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7f1188b42df7 in ???
#1 0x7f1188b4202d in ???
#2 0x7f118803694f in ???
#3 0x400fa7 in __mod_MOD_foo_destroy
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:46
#4 0x400f0f in __mod_MOD___final_mod_Foo
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:49
#5 0x400b29 in __mod_MOD___final_mod_Bar
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:49
#6 0x401026 in sub
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:59
#7 0x40104a in MAIN__
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:55
#8 0x401080 in main
at /home/nnc/Fortran/Bugs/gfortran/tmp/gfortran-bug-20171114a.f90:53
Segmentation fault (core dumped)
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
Date: Tue, 14 Nov 2017 20:27:00 -0000
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--- Comment #1 from neil.n.carlson at gmail dot com ---
In the second example, I add a final procedure for BAR (not necessary) and
explicitly call the FOO final procedure on its B component. This gives an ICE
f951: internal compiler error: in generate_finalization_wrapper, at
fortran/class.c:1975
module mod
type foo
integer, pointer :: f(:) => null()
contains
final :: foo_destroy
end type
type bar
type(foo) :: b(2)
contains
final :: bar_destroy
end type
contains
elemental subroutine foo_destroy(this)
type(foo), intent(inout) :: this
if (associated(this%f)) deallocate(this%f)
end subroutine
subroutine bar_destroy(this)
type(bar), intent(inout) :: this
call foo_destroy(this%b)
end subroutine
end module
program main
use mod
type(bar) :: x
call sub(x)
contains
subroutine sub(x)
type(bar), intent(out) :: x
end subroutine
end program
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82985] GCC 7.2.1 crashes when compiling DSO (Direct Sparse Odometry) on Linux Ubuntu 17.10
Date: Tue, 14 Nov 2017 20:28:00 -0000
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--- Comment #16 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 42606
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42606&action=edit
somewhat reduced testcase
(Creduce struggles with 7.6MB boost testcases...)
% g++ -mavx2 -c -O2 FullSystemOptimize.ii -w
FullSystemOptimize.ii: In member function ‘bool
std::FullSystem::doStepFromBackup()’:
FullSystemOptimize.ii:446:6: internal compiler error: in
vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
bool FullSystem::doStepFromBackup() {
^~~~~~~~~~
0xc52643 vn_nary_build_or_lookup_1
../../gcc/gcc/tree-ssa-sccvn.c:1722
0xc546a9 vn_nary_build_or_lookup
../../gcc/gcc/tree-ssa-sccvn.c:1758
0xc546a9 vn_reference_lookup_3
../../gcc/gcc/tree-ssa-sccvn.c:2037
0xbbe6fe walk_non_aliased_vuses(ao_ref*, tree_node*, void* (*)(ao_ref*,
tree_node*, unsigned int, void*), void* (*)(ao_ref*, tree_node*, void*, bool*),
tree_node* (*)(tree_node*), void*)
../../gcc/gcc/tree-ssa-alias.c:2872
0xc53179 vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool)
../../gcc/gcc/tree-ssa-sccvn.c:2450
0xc558e0 visit_reference_op_load
../../gcc/gcc/tree-ssa-sccvn.c:3691
0xc558e0 visit_use
../../gcc/gcc/tree-ssa-sccvn.c:4031
0xc57050 process_scc
../../gcc/gcc/tree-ssa-sccvn.c:4293
0xc57050 extract_and_process_scc_for_name
../../gcc/gcc/tree-ssa-sccvn.c:4349
0xc57050 DFS
../../gcc/gcc/tree-ssa-sccvn.c:4401
0xc58496 sccvn_dom_walker::before_dom_children(basic_block_def*)
../../gcc/gcc/tree-ssa-sccvn.c:4854
0x10ea63a dom_walker::walk(basic_block_def*)
../../gcc/gcc/domwalk.c:265
0xc5905a run_scc_vn(vn_lookup_kind)
../../gcc/gcc/tree-ssa-sccvn.c:4978
0xc356df execute
../../gcc/gcc/tree-ssa-pre.c:5093
>From gcc-bugs-return-581742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 20:30:40 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
Date: Tue, 14 Nov 2017 20:30:00 -0000
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--- Comment #2 from neil.n.carlson at gmail dot com ---
In the final example I drop the elemental attribute from the FOO final
procedure and modify the BAR final procedure to loop over the elements of its B
array component. This too yields an ICE:
f951: internal compiler error: in generate_finalization_wrapper, at
fortran/class.c:1975
module mod
type foo
integer, pointer :: f(:) => null()
contains
final :: foo_destroy
end type
type bar
type(foo) :: b(2)
contains
final :: bar_destroy
end type
contains
subroutine foo_destroy(this)
type(foo), intent(inout) :: this
if (associated(this%f)) deallocate(this%f)
end subroutine
subroutine bar_destroy(this)
type(bar), intent(inout) :: this
integer :: j
do j = 1, size(this%b)
call foo_destroy(this%b(j))
end do
end subroutine
end module
program main
use mod
type(bar) :: x
call sub(x)
contains
subroutine sub(x)
type(bar), intent(out) :: x
end subroutine
end program
>From gcc-bugs-return-581743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 22:07:50 2017
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Subject: [Bug fortran/82995] Segmentation fault passing optional argument to intrinsic sum function
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Priority|P3 |P4
Status|WAITING |NEW
CC| |kargl at gcc dot gnu.org
Target Milestone|--- |8.0
--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> IMO the code is invalid: you cannot call my_sum with only one argument. I
> get a segfault for all the revision I have tested from 4.8 up to trunk
> (8.0), except with my instrumented trunk for which I get 0.
>
> I am a little bit surprised that the mismatch between caller and callee is
> not detected, but I think a compiler does have to (I did not look at the
> standard legalese).
The code is valid. From 2008, page 299
An optional dummy argument that is not present is subject to the
following restrictions.
(1) If it is a data object, it shall not be referenced or be
defined. ...
...
Except as noted in the list above, it may be supplied as an actual
argument corresponding to an optional dummy argument, which is then
also considered not to be present.
By (1), one would think that the absent optional argument cannot
be referenced within my_sum(). However, the exception explicitly
allows this case as the MASK argument of SUM is optional.
>From gcc-bugs-return-581744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 14 22:53:23 2017
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Subject: [Bug other/82997] New: [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Tue, 14 Nov 2017 22:53:00 -0000
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Bug ID: 82997
Summary: [8 regression] gcc.dg/cpp/sysmac1.c and
gcc.dg/cpp/macsyntx.c fail starting with r254707
Product: gcc
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These test cases are looking for the message
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/cpp/macsyntx.c:54:6: warning:
ISO C99 requires at least one argument for the "..." in a variadic macro
and after this revision that message is no longer produced (at least for these
tests).
>From gcc-bugs-return-581745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 00:05:12 2017
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Subject: [Bug debug/82998] New: Internal compiler error in force_type_die in dwarf2out.c
Date: Wed, 15 Nov 2017 00:05:00 -0000
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Bug ID: 82998
Summary: Internal compiler error in force_type_die in
dwarf2out.c
Product: gcc
Version: 7.2.0
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Created attachment 42607
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42607&action=edit
Preprocessed source code (from ceph-10.2.9 source) which triggers the internal
compiler error
[root@alarm src]# g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/gcc-7.2.0/libexec/gcc/armv7l-unknown-linux-gnueabihf/7.2.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-7.2.0/configure --prefix=/usr/local/gcc-7.2.0
--with-float=hard --enable-languages=c,c++
Thread model: posix
gcc version 7.2.0 (GCC)
[root@alarm src]#
g++ -DHAVE_CONFIG_H -I. -D__CEPH__ -D_FILE_OFFSET_BITS=64 -D_THREAD_SAFE
-D__STDC_FORMAT_MACROS -D_GNU_SOURCE -DCEPH_LIBDIR="/usr/local/ceph-10.2.9/lib"
-DCEPH_PKGLIBDIR="/usr/local/ceph-10.2.9/lib/ceph" -DGTEST_USE_OWN_TR1_TUPLE=0
-D_REENTRANT -Wall -Wtype-limits -Wignored-qualifiers -Winit-self
-Wpointer-arith -fno-strict-aliasing -fsigned-char -rdynamic
-ftemplate-depth-1024 -Wnon-virtual-dtor -Wno-invalid-offsetof -O2 -g -pipe
-Wall -Wp,-U_FORTIFY_SOURCE -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
--param=ssp-buffer-size=4 -fPIE -fstack-protector-strong -fno-builtin-malloc
-fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free
-Wstrict-null-sentinel -g -O2 -MT osd/libosd_a-ECBackend.o -MD -MP -MF
osd/.deps/libosd_a-ECBackend.Tpo -c -o osd/libosd_a-ECBackend.o
osd/ECBackend.cc -save-temps
g++: warning: -pipe ignored because -save-temps specified
osd/ECBackend.cc: In member function 'int ECBackend::get_remaining_shards(const
hobject_t&, const std::set<int>&, std::set<pg_shard_t>*)':
osd/ECBackend.cc:1532:52: warning: variable 'miter' set but not used
[-Wunused-but-set-variable]
map<hobject_t, set<pg_shard_t> >::const_iterator miter =
^~~~~
In file included from osd/ECBackend.cc:24:0:
osd/ReplicatedPG.h: In destructor 'virtual
ReplicatedPG::WaitTrimTimer::WaitTrimTimer(boost::statechart::state<ReplicatedPG::WaitTrimTimer,
ReplicatedPG::Trimming>::my_context)::OnTimer::~OnTimer()':
osd/ReplicatedPG.h:1667:14: internal compiler error: in force_type_die, at
dwarf2out.c:25099
struct OnTimer : Context {
^~~~~~~
0x3dac23 force_type_die
../../gcc-7.2.0/gcc/dwarf2out.c:25099
0x3d8627 get_context_die
../../gcc-7.2.0/gcc/dwarf2out.c:25013
0x3d8627 force_decl_die
../../gcc-7.2.0/gcc/dwarf2out.c:25032
0x3d5dcf gen_subprogram_die
../../gcc-7.2.0/gcc/dwarf2out.c:21895
0x3d6dc3 gen_decl_die
../../gcc-7.2.0/gcc/dwarf2out.c:25335
0x3d7ae3 dwarf2out_decl
../../gcc-7.2.0/gcc/dwarf2out.c:25844
0x3d635b dwarf2out_abstract_function
../../gcc-7.2.0/gcc/dwarf2out.c:21671
0x708aef expand_call_inline
../../gcc-7.2.0/gcc/tree-inline.c:4887
0x7099cf gimple_expand_calls_inline
../../gcc-7.2.0/gcc/tree-inline.c:4917
0x7099cf optimize_inline_calls(tree_node*)
../../gcc-7.2.0/gcc/tree-inline.c:5057
0xc4c01f early_inliner(function*)
../../gcc-7.2.0/gcc/ipa-inline.c:2721
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-581746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 00:50:03 2017
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Subject: [Bug libgomp/60670] omp.h may differ between multilibs
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Radford Neal <radfordneal at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |radfordneal at gmail dot com
--- Comment #17 from Radford Neal <radfordneal at gmail dot com> ---
I'd like to add some urgency to getting this fixed.
The problem with omp.h defining an incorrect omp_lock_t type shows up when gcc
is installed with Homebrew (https://brew.sh) on macOS, for any modern 64-bit
system, since the omp_lock_t type is set up for 32-bit builds. It also shows
up with the Rtools package for installing R on Windows. It probably shows up
in various other contexts too. The consequence is that OpenMP doesn't work
correctly, in ways that may well be non-obvious, and very hard to diagnose for
anyone who doesn't realize what is going on.
One could say that these package providers ought to provide separate 32-bit and
64-bit versions of omp.h, but the fact is that they don't. And it's not really
unreasonable for them to think that omp.h will correctly define the types for
both 32-bit and 64-bit builds - that's the way just about every other package
works. What you're doing with keeping omg_log_t "private" by defining it as a
byte array with length filled in during the build is decidedly not a standard
approach, and it's unsurprising that it ends up causing problems. You ought to
change to a different approach.
If that's not possible immediately, however, you should implement a kludge -
just set @OMP_LOCK_SIZE@ to the maximum that it might be for any platform.
>From gcc-bugs-return-581747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 01:11:29 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82995] Segmentation fault passing optional argument to intrinsic sum function
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
OK! I have overlooked the line
logical, intent(in), optional :: mask(:)
in my_sum and it rung some bell. This PR is related to/duplicate of pr67277.
>From gcc-bugs-return-581748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 01:54:25 2017
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Subject: [Bug c/81156] GCC fails to compile a formula with tgmath.h
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--- Comment #6 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Author: jsm28
Date: Wed Nov 15 01:53:45 2017
New Revision: 254749
URL: https://gcc.gnu.org/viewcvs?rev=254749&root=gcc&view=rev
Log:
Add __builtin_tgmath for better tgmath.h implementation (bug 81156).
Various implementations of C99/C11 <tgmath.h> have the property that
their macro expansions contain many copies of the macro arguments, so
resulting in exponential blowup of the size of macro expansions where
a call to such a macro contains other such calls in the macro
arguments.
This patch adds a (C-only) language feature __builtin_tgmath designed
to avoid this problem by implementing the <tgmath.h> function
selection rules directly in the compiler. The effect is that
type-generic macros can be defined simply as
#define pow(a, b) __builtin_tgmath (powf, pow, powl, \
cpowf, cpow, cpowl, a, b)
as in the example added to the manual, with each macro argument
expanded exactly once. The details of __builtin_tgmath are as
described in the manual. This is C-only since C++ uses function
overloading and just defines <ctgmath> to include <ccomplex> and
<cmath>.
__builtin_tgmath handles C99/C11 type-generic macros, and _FloatN,
_FloatNx and decimal floating-point types (following the proposed
resolution to the floating-point TS DR#9 that makes the rules for
finding a common type from arguments to a type-generic macro follow
the usual arithmetic conversions after adjustment of integer arguments
to _Decimal64 or double - or to _Complex double in the case of GNU
complex integer arguments).
Type-generic macros for functions from TS 18661 that round their
results to a narrower type are handled, but there are still some
unresolved questions regarding such macros so further changes in that
regard may be needed in future. The current implementation follows an
older version of the DR#13 resolution (allowing a function for a
wide-enough argument type to be selected if no exactly-matching
function is available), but with appropriate calls to __builtin_tgmath
is still fully compatible with the latest version of the resolution
(not yet in the DR log), and allowing such not-exactly-matching
argument types to be chosen in that case avoids needing another
special case to treat integers as _Float64 instead of double in
certain cases.
Regarding other possible language/library features, not currently
implemented in GCC:
* Imaginary types could be naturally supported by allowing cases where
the type-generic type is an imaginary type T and arguments or return
types may be T (as at present), or the corresponding real type to T
(as at present), or (new) the corresponding real type if T is real
or imaginary but T if T is complex. (tgmath.h would need a series
of functions such as
static inline _Imaginary double
__sin_imag (_Imaginary double __x)
{
return _Imaginary_I * sinh (__imag__ __x);
}
to be used in __builtin_tgmath calls.)
* __builtin_tgmath would use the constant rounding direction in the
presence of support for the FENV_ROUND / FENV_DEC_ROUND pragmas.
Support for those would also require a new __builtin_<something> to
cause a non-type-generic call to use the constant rounding
direction (it seems cleaner to add a new __builtin_<something> when
required than to make __builtin_tgmath handle a non-type-generic
case with only one function argument).
* TS 18661-5 __STDC_TGMATH_OPERATOR_EVALUATION__ would require new
__builtin_<something> that evaluates with excess range and precision
like arithmetic operators do.
* The proposed C bindings for IEEE 754-2018 augmented arithmetic
operations involve struct return types. As currently implemented
__builtin_tgmath does not handle those, but support could be added.
There are many error cases that the implementation diagnoses. I've
tried to ensure reasonable error messages for erroneous uses of
__builtin_tgmath, but the errors for erroneous uses of the resulting
type-generic macros (that is, when the non-function arguments have
inappropriate types) are more important as they are more likely to be
seen by users.
GCC's own tgmath.h, as used for some targets, is updated in this
patch. I've tested those changes minimally, via adjusting
gcc.dg/c99-tgmath-* locally to use that tgmath.h version. I've also
run the glibc testsuite (which has much more thorough tests of
correctness of tgmath.h function selection) with a glibc patch to use
__builtin_tgmath in glibc's tgmath.h.
Bootstrapped with no regressions on x86_64-pc-linux-gnu.
PR c/81156
gcc:
* doc/extend.texi (Other Builtins): Document __builtin_tgmath.
* ginclude/tgmath.h (__tg_cplx, __tg_ldbl, __tg_dbl, __tg_choose)
(__tg_choose_2, __tg_choose_3, __TGMATH_REAL_1_2)
(__TGMATH_REAL_2_3): Remove macros.
(__TGMATH_CPLX, __TGMATH_CPLX_2, __TGMATH_REAL, __TGMATH_REAL_2)
(__TGMATH_REAL_3, __TGMATH_CPLX_ONLY): Define using
__builtin_tgmath.
(frexp, ldexp, nexttoward, scalbn, scalbln): Define using
__TGMATH_REAL_2.
(remquo): Define using __TGMATH_REAL_3.
gcc/c:
* c-parser.c (check_tgmath_function): New function.
(enum tgmath_parm_kind): New enum.
(c_parser_postfix_expression): Handle __builtin_tgmath.
gcc/c-family:
* c-common.c (c_common_reswords): Add __builtin_tgmath.
* c-common.h (enum rid): Add RID_BUILTIN_TGMATH.
gcc/testsuite:
* gcc.dg/builtin-tgmath-1.c, gcc.dg/builtin-tgmath-2.c,
gcc.dg/builtin-tgmath-err-1.c, gcc.dg/builtin-tgmath-err-2.c,
gcc.dg/dfp/builtin-tgmath-dfp-err.c,
gcc.dg/dfp/builtin-tgmath-dfp.c: New tests.
Added:
trunk/gcc/testsuite/gcc.dg/builtin-tgmath-1.c
trunk/gcc/testsuite/gcc.dg/builtin-tgmath-2.c
trunk/gcc/testsuite/gcc.dg/builtin-tgmath-err-1.c
trunk/gcc/testsuite/gcc.dg/builtin-tgmath-err-2.c
trunk/gcc/testsuite/gcc.dg/dfp/builtin-tgmath-dfp-err.c
trunk/gcc/testsuite/gcc.dg/dfp/builtin-tgmath-dfp.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/doc/extend.texi
trunk/gcc/ginclude/tgmath.h
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/81156] GCC fails to compile a formula with tgmath.h
Date: Wed, 15 Nov 2017 01:55:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #7 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Fixed for GCC 8 (given appropriate change to the tgmath.h being used to use
__builtin_tgmath).
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From: "zuogang at huawei dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82999] New: a func has two entrys: one inlined, another is normal
Date: Wed, 15 Nov 2017 03:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82999
Bug ID: 82999
Summary: a func has two entrys: one inlined, another is normal
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zuogang at huawei dot com
Target Milestone: ---
centos 7 kernel: 3.10.0-693.2.2.el7.x86_64
global func tcp_v4_mtu_reduced has two entrys , one is inlined when called in
the same file (such as func tcp_v4_err call tcp_v4_mtu_reduced), aother is a
normal entry call the .part. stub.
the inlined entry of tcp_v4_mtu_reduced (part of code of func tcp_v4_err):
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:445
ffffffff817663ab: 89 83 30 07 00 00 mov %eax,0x730(%rbx)
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:446
ffffffff817663b1: 75 26 jne ffffffff817663d9
<tcp_v4_err+0x499>
tcp_v4_mtu_reduced():
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:276
ffffffff817663b3: 0f b6 43 12 movzbl 0x12(%rbx),%eax
ffffffff817663b7: ba 80 04 00 00 mov $0x480,%edx
ffffffff817663bc: 0f a3 c2 bt %eax,%edx
ffffffff817663bf: 0f 82 b7 fd ff ff jb ffffffff8176617c
<tcp_v4_err+0x23c>
ffffffff817663c5: 48 89 df mov %rbx,%rdi
ffffffff817663c8: e8 43 e2 ff ff callq ffffffff81764610
<tcp_v4_mtu_reduced.part.29>
ffffffff817663cd: 48 8d 83 80 00 00 00 lea 0x80(%rbx),%rax
ffffffff817663d4: e9 aa fd ff ff jmpq ffffffff81766183
<tcp_v4_err+0x243>
test_and_set_bit():
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/arch/x86/include/asm/bitops.h:206
ffffffff817663d9: f0 0f ba ab 30 05 00 lock btsl $0x5,0x530(%rbx)
ffffffff817663e0: 00 05
ffffffff817663e2: 0f 82 94 fd ff ff jb ffffffff8176617c
<tcp_v4_err+0x23c>
the normal entry of tcp_v4_mtu_reduced:
ffffffff817646c0 <tcp_v4_mtu_reduced>:
tcp_v4_mtu_reduced():
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:271
ffffffff817646c0: e8 3b f6 0b 00 callq ffffffff81823d00
<__fentry__>
ffffffff817646c1: R_X86_64_PC32 __fentry__-0x4
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:276
ffffffff817646c5: 0f b6 47 12 movzbl 0x12(%rdi),%eax
ffffffff817646c9: ba 80 04 00 00 mov $0x480,%edx
ffffffff817646ce: 0f a3 c2 bt %eax,%edx
ffffffff817646d1: 73 01 jae ffffffff817646d4
<tcp_v4_mtu_reduced+0x14>
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:303
ffffffff817646d3: c3 retq
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:271
ffffffff817646d4: 55 push %rbp
ffffffff817646d5: 48 89 e5 mov %rsp,%rbp
ffffffff817646d8: e8 33 ff ff ff callq ffffffff81764610
<tcp_v4_mtu_reduced.part.29>
/usr/src/debug/kernel-4.9.el7.centos/linux-4.9.54-203.el7.centos.x86_64/net/ipv4/tcp_ipv4.c:303
ffffffff817646dd: 5d pop %rbp
ffffffff817646de: 66 90 xchg %ax,%ax
ffffffff817646e0: c3 retq
gcc generated code like this make ftrace and other kernel tools functions
abnormal, when a func is called, ftrace cannot knew it, so I think when gcc
want to do some works about generate stub func .part., should know the target
func is global or not, if it is global, don't do like that, it will make a func
has two entrys and confuse the kernel and peoples.
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Subject: [Bug target/82990] Add -mprefer-vzeroupper
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----------------------------------------------------------------------------
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Subject: [Bug target/82990] Add -mprefer-vzeroupper
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42608
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42608&action=edit
A patch
Sebastian, please take a look.
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Subject: [Bug target/82990] Add -mprefer-vzeroupper
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42608|0 |1
is obsolete| |
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42611
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A better patch
Sebastian, please take a look.
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82990] Update the default -mzeroupper setting
Date: Wed, 15 Nov 2017 05:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82990
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
Target Milestone|--- |8.0
Summary|Add -mprefer-vzeroupper |Update the default
| |-mzeroupper setting
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
-mzeroupper is specified to generate vzeroupper instruction. If it
isn't used, the default should depend on !TARGET_AVX512ER. Users can
always use -mzeroupper or -mno-zeroupper to override it.
>From gcc-bugs-return-581755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 06:29:20 2017
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From: "wilhelm.meier@hs-kl.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83000] New: Constraints for union-templates do not work
Date: Wed, 15 Nov 2017 06:29:00 -0000
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Bug ID: 83000
Summary: Constraints for union-templates do not work
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
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In the following example, the requirement is not met. But the template-union
Test is instantiated:
template<typename T>
requires (sizeof(T) > 1)
union Test {
};
int main(){
Test<char> x;
}
If one changes the union into a struct, the requirement is correctly checked
and the struct-template not instantiated.
>From gcc-bugs-return-581756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 06:29:52 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83001] New: [8 Regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Wed, 15 Nov 2017 06:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83001
Bug ID: 83001
Summary: [8 Regression] ICE in edge_badness, at
ipa-inline.c:1025
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
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Reporter: marxin at gcc dot gnu.org
CC: hubicka at ucw dot cz, marxin at gcc dot gnu.org
Target Milestone: ---
Starting from r254696 we ICE on:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-2.C
-c -Og -fno-guess-branch-probability
during IPA pass: inline
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-2.C:49:1:
internal compiler error: in edge_badness, at ipa-inline.c:1025
}
^
0x1d4355a edge_badness
../../gcc/ipa-inline.c:1024
0x1d4459f update_edge_key
../../gcc/ipa-inline.c:1224
0x1d44a66 update_caller_keys
../../gcc/ipa-inline.c:1346
0x1d449cb update_caller_keys
../../gcc/ipa-inline.c:1335
0x1d46adc inline_small_functions
../../gcc/ipa-inline.c:2051
0x1d480fa ipa_inline
../../gcc/ipa-inline.c:2442
0x1d48dfc execute
../../gcc/ipa-inline.c:2849
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Subject: [Bug ipa/83001] [8 Regression] ICE in edge_badness, at ipa-inline.c:1025
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-581758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 06:49:05 2017
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-15
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-581759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 06:58:27 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Wed, 15 Nov 2017 06:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-15
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please provide pre-processed source file?
>From gcc-bugs-return-581760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 07:07:44 2017
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Subject: [Bug fortran/82969] ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
Date: Wed, 15 Nov 2017 07:07:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with GCC 4.7.0.
>From gcc-bugs-return-581762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 07:08:43 2017
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Subject: [Bug debug/82155] [7 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Wed, 15 Nov 2017 07:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |plinich at cse dot unsw.edu.au
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 82998 has been marked as a duplicate of this bug. ***
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Subject: [Bug debug/82998] Internal compiler error in force_type_die in dwarf2out.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82998
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 82155 ***
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Subject: [Bug target/82927] [8 Regression] ICE in verify_flow_info building SH glibc
Date: Wed, 15 Nov 2017 07:12:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Nov 15 07:11:59 2017
New Revision: 254755
URL: https://gcc.gnu.org/viewcvs?rev=254755&root=gcc&view=rev
Log:
Use proper probability (PR target/82927)
2017-11-15 Martin Liska <mliska@suse.cz>
PR target/82927
* config/sh/sh-mem.cc: Use proper probability for
REG_BR_PROB_NOTE.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh-mem.cc
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Subject: [Bug target/82927] [8 Regression] ICE in verify_flow_info building SH glibc
Date: Wed, 15 Nov 2017 07:19:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument
Date: Wed, 15 Nov 2017 08:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-15
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Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> GCC tracks that fact, see gimple_call_return_flags ERF_RETURNS_ARG and
> ERF_RETURN_ARG_MASK to say which argument it is.
> From what I can see, it is used during aliasing and vrp (in the latter case
> only whether it is non-NULL or not). So it is just a matter of using it in
> further optimizations. But it needs to be used with care.
> Trying to optimize:
> return strcpy (x, y);
> as
> strcpy (x, y);
> return x;
> is not a good idea, it would make it not tail-call optimizable, and in many
> cases even for RA purposes it is cheaper to read the value from the return
> register rather than saving it in call saved register and restoring from
> there, etc. Which is why it is not that strightforward to say do it in SCCVN.
Yes, I've done it in SCCVN (I belive there's a dup of this PR), also to the
effect to transform
x = strcpy (y, z);
foo (y);
to
x = strcpy (y, z);
foo (x);
I can dig up the patch, it must be sitting somewhere on my disk...
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Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c/82999] a func has two entrys: one inlined, another is normal
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just use -fno-partial-inlining if you don't like it.
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Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
Date: Wed, 15 Nov 2017 08:41:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 15 08:40:32 2017
New Revision: 254757
URL: https://gcc.gnu.org/viewcvs?rev=254757&root=gcc&view=rev
Log:
PR tree-optimization/82977
* tree-ssa-strlen.c (strlen_optimize_stmt): Pass a reference to a copy
constructed temporary to strlen_to_stridx.put.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-strlen.c
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From: "vincenzo.romano at notorand dot it" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/62002] -fcilkplus switch breaks format attribute.
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Vincenzo Romano <vincenzo.romano at notorand dot it> changed:
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----------------------------------------------------------------------------
CC| |vincenzo.romano at notorand dot it
--- Comment #7 from Vincenzo Romano <vincenzo.romano at notorand dot it> ---
The original code snippet is wrong.
It should read
void bar(char const *, ...) __attribute__((__format__(__printf__, 1, 2)));
instead of
void bar(char const *, ...) __attribute__((__format__(__printf__, 2, 3)));
Accordingly to the documentation at
https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#Common-Function-Attributes
The second __format__() argument is the 1-based position of the formatting
string, while the third one is the 1-based position of the first argument to be
checked.
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42612
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42612&action=edit
lshrdi3.c
To reproduce:
...
$ gcc -mcpu=ev6 -mieee -mpointer-size=64 -g -O2 -fbuilding-libgcc
-fno-stack-protector -mpointer-size=64 -S lshrdi3.c
src/libgcc/libgcc2.c:427:1: internal compiler error: in dwarf2out_finish, at
dwarf2out.c:29826
}
^
0xa64e1b dwarf2out_finish
src/gcc/dwarf2out.c:29826
0x1476ede vmsdbgout_finish
src/gcc/vmsdbgout.c:1569
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
...
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Wed, 15 Nov 2017 09:01:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 15 09:01:42 2017
New Revision: 254758
URL: https://gcc.gnu.org/viewcvs?rev=254758&root=gcc&view=rev
Log:
PR target/82981
* internal-fn.c: Include gimple-ssa.h, tree-phinodes.h and
ssa-iterators.h.
(can_widen_mult_without_libcall): New function.
(expand_mul_overflow): If only checking unsigned mul overflow,
not result, and can do efficiently MULT_HIGHPART_EXPR, emit that.
Don't use WIDEN_MULT_EXPR if it would involve a libcall, unless
no other way works. Add MULT_HIGHPART_EXPR + MULT_EXPR support.
(expand_DIVMOD): Formatting fix.
* expmed.h (expand_mult): Add NO_LIBCALL argument.
* expmed.c (expand_mult): Likewise. Use OPTAB_WIDEN rather
than OPTAB_LIB_WIDEN if NO_LIBCALL is true, and allow it to fail.
* gcc.target/mips/pr82981.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/mips/pr82981.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expmed.c
trunk/gcc/expmed.h
trunk/gcc/internal-fn.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/82814] ICE from submodule character function
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
I'll take it.
Paul
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Wed, 15 Nov 2017 09:40:00 -0000
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
So, deferred_asm_name is cleared by dwarf2out_early_finish, which is then
checked by the assert in dwarf2out_finish.
vmsdbgout_finish calls dwarf2out_finish (which checks the assert), but
dwarf2out_early_finish is never called.
The vms debug hooks have vmsdbgout_finish but no vmsdbgout_early_finish:
...
const struct gcc_debug_hooks vmsdbg_debug_hooks
= {vmsdbgout_init,
vmsdbgout_finish,
debug_nothing_charstar, /* early_finish */
...
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Wed, 15 Nov 2017 09:42:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rupp at gnat dot com,
| |sebastian.huber@embedded-br
| |ains.de
Known to fail| |8.0
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, following simple test-case is sufficient:
$ cat ice.i
int a;
Also ICEs with merge base of GCC 7 branch.
I'm CCing VMS maintainers.
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Subject: [Bug fortran/82923] Automatic allocation of deferred length character using function result
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Ha! That's an 'amusing' one. I too am surprised that there is no duplicate.
I'll take it.
Paul
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I see the problems on all gfortran supporting finalization (4.9 up to trunk
8.0), except the ICEs that are no longer present on recent trunk. The change
occurred between revisions r247817 (2017-05-09, ICE) and r248367 (2017-05-23,
compiles). In top of that the code in comment 2 executes without segfault.
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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Target Milestone|--- |7.3
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Wed, 15 Nov 2017 10:17:00 -0000
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--- Comment #5 from Janne Blomqvist <jb at gcc dot gnu.org> ---
So the problem is the logical(kind=1) one, it should be the same type as the
LHS.
It seems it originates from (from .003t.original):
logical(kind=4) D.3603;
...
D.3603 = (struct test_typ[0:] * restrict) conc.data == 0B;
Then in the .177t.thread3 dump this has become:
_15 = _34 == _6;
Then finally in the 178t.dom3 dump with -fdump-tree-all-details (this is the
pass where it ICE's):
Optimizing statement _15 = _34 == _6;
Replaced '_34' with variable '_13'
Replaced '_6' with constant '&A.7'
gimple_simplified to _15 = 0;
Folded to: _15 = 0;
LKUP STMT _15 = 0
==== ASGN _15 = 0
I have gone through uses of EQ_EXPR (and NE_EXPR, and boolean_type_node, and
boolean_true_node, and boolean_false_node) in the frontend and I haven't found
a place where it would use boolean_type_node (i.e. logical(kind=1) instead of
logical_type_node (logical(kind=4)). So at the moment I'm a bit stuck. Does the
above give you any kind of hint what the problem might be?
>From gcc-bugs-return-581780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 10:33:55 2017
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
Date: Wed, 15 Nov 2017 10:33:00 -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 #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like a dup of PR81790. Will backport the fix.
>From gcc-bugs-return-581781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:11:04 2017
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Subject: [Bug target/82990] Update the default -mzeroupper setting
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--- Comment #5 from Sebastian Peryt <sebastian.peryt at intel dot com> ---
(In reply to H.J. Lu from comment #3)
> Created attachment 42611 [details]
> A better patch
>
> Sebastian, please take a look.
LGTM
>From gcc-bugs-return-581782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:19:42 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82969] [6/7/8 Regression] ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
Date: Wed, 15 Nov 2017 11:19:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Known to work| |4.6.4
Summary|ICE in gfc_class_vptr_get, |[6/7/8 Regression] ICE in
|at fortran/trans-expr.c:211 |gfc_class_vptr_get, at
| |fortran/trans-expr.c:211
Known to fail| |4.7.3, 4.8.5, 4.9.3, 5.5.0,
| |6.4.0, 7.2.0, 8.0
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Confirmed, started with GCC 4.7.0.
Thus it is a regression. The change occurred between revisions r182107
(2011-12-08, compiles) and r183001 (2012-01-09, ICE).
It is related to/a duplicate of pr66679 (same ICE). pr79072 gives a similar
ICE, but in a different location: fortran/trans-expr.c:226. Both locations
correspond to a call to gfc_advance_chain.
>From gcc-bugs-return-581783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:23:32 2017
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Subject: [Bug fortran/82979] [PDT] [F2003] [ice-on-invalid] ICE (segfault) on invalid type-param-name-list in PDT declaration
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |error-recovery
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-15
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
My instrumented gfortran gives
Error: Expected parameter list in type declaration at (1)
=================================================================
==77480==ERROR: AddressSanitizer: heap-use-after-free on address 0x613000002f00
at pc 0x0001004995e8 bp 0x7ffeefbfe670 sp 0x7ffeefbfe668
READ of size 8 at 0x613000002f00 thread T0
#0 0x1004995e7 in gfc_restore_last_undo_checkpoint() symbol.c:3647
#1 0x10049aa2c in gfc_undo_symbols() symbol.c:3727
#2 0x1002fefd5 in reject_statement() parse.c:2546
#3 0x1002ff11d in match_word(char const*, match (*)(), locus*) parse.c:70
#4 0x10030cdd0 in decode_statement() parse.c:565
#5 0x10030e091 in next_free() parse.c:1225
#6 0x10030ea5e in next_statement() parse.c:1457
#7 0x10031e6f4 in gfc_parse_file() parse.c:6160
#8 0x1004d36b3 in gfc_be_parse_file() f95-lang.c:204
#9 0x1052de1b0 in compile_file() toplev.c:454
#10 0x1052e857d in do_compile() toplev.c:2059
#11 0x1075dd23b in toplev::main(int, char**) toplev.c:2194
#12 0x1075e2a87 in main main.c:39
#13 0x7fff5ec55144 in start (libdyld.dylib:x86_64+0x1144)
0x613000002f00 is located 320 bytes inside of 336-byte region
[0x613000002dc0,0x613000002f10)
freed by thread T0 here:
#0 0x155318460 in wrap_free.part.0 sanitizer_malloc_mac.inc:142
#1 0x100489adb in gfc_free_symbol(gfc_symbol*) symbol.c:3061
#2 0x100489e27 in gfc_release_symbol(gfc_symbol*) symbol.c:3088
#3 0x10048a2a6 in free_sym_tree(gfc_symtree*) symbol.c:3890
#4 0x10048905b in gfc_free_namespace(gfc_namespace*) symbol.c:4045
#5 0x100489a6c in gfc_free_symbol(gfc_symbol*) symbol.c:3054
#6 0x100489e27 in gfc_release_symbol(gfc_symbol*) symbol.c:3088
#7 0x10049a1c7 in gfc_restore_last_undo_checkpoint() symbol.c:3696
#8 0x10049aa2c in gfc_undo_symbols() symbol.c:3727
#9 0x1002fefd5 in reject_statement() parse.c:2546
#10 0x1002ff11d in match_word(char const*, match (*)(), locus*) parse.c:70
#11 0x10030cdd0 in decode_statement() parse.c:565
#12 0x10030e091 in next_free() parse.c:1225
#13 0x10030ea5e in next_statement() parse.c:1457
#14 0x10031e6f4 in gfc_parse_file() parse.c:6160
#15 0x1004d36b3 in gfc_be_parse_file() f95-lang.c:204
#16 0x1052de1b0 in compile_file() toplev.c:454
#17 0x1052e857d in do_compile() toplev.c:2059
#18 0x1075dd23b in toplev::main(int, char**) toplev.c:2194
#19 0x1075e2a87 in main main.c:39
#20 0x7fff5ec55144 in start (libdyld.dylib:x86_64+0x1144)
previously allocated by thread T0 here:
#0 0x155317aac in wrap_calloc sanitizer_malloc_mac.inc:153
#1 0x10746b354 in xcalloc xmalloc.c:162
#2 0x100480eb1 in gfc_new_symbol(char const*, gfc_namespace*) symbol.c:3099
#3 0x1004833c0 in gfc_get_sym_tree(char const*, gfc_namespace*,
gfc_symtree**, bool) symbol.c:3348
#4 0x100484a01 in gfc_get_symbol(char const*, gfc_namespace*, gfc_symbol**)
symbol.c:3401
#5 0x1000b162d in gfc_match_formal_arglist(gfc_symbol*, int, int, bool)
decl.c:5959
#6 0x1000cd42e in gfc_match_derived_decl() decl.c:9829
#7 0x1002ff09b in match_word(char const*, match (*)(), locus*) parse.c:65
#8 0x10030cdd0 in decode_statement() parse.c:565
#9 0x10030e091 in next_free() parse.c:1225
#10 0x10030ea5e in next_statement() parse.c:1457
#11 0x10031e6f4 in gfc_parse_file() parse.c:6160
#14 0x1052e857d in do_compile() toplev.c:2059
#15 0x1075dd23b in toplev::main(int, char**) toplev.c:2194
#16 0x1075e2a87 in main main.c:39
#17 0x7fff5ec55144 in start (libdyld.dylib:x86_64+0x1144)
SUMMARY: AddressSanitizer: heap-use-after-free symbol.c:3647 in
gfc_restore_last_undo_checkpoint()
Shadow bytes around the buggy address:
0x1c2600000590: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x1c26000005a0: fd fd fd fd fd fd fd fd fd fd fa fa fa fa fa fa
0x1c26000005b0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
0x1c26000005c0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x1c26000005d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x1c26000005e0:[fd]fd fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c26000005f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c2600000600: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c2600000610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c2600000620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c2600000630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==77480==ABORTING
f951: internal compiler error: Abort trap: 6
>From gcc-bugs-return-581784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:41:59 2017
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From: "demoonlit at panathenaia dot halfmoon.jp" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83002] New: Missing finalization of generic package body
Date: Wed, 15 Nov 2017 11:41:00 -0000
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Bug ID: 83002
Summary: Missing finalization of generic package body
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Created attachment 42613
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42613&action=edit
bug triggering source code
Hello.
The finalizer of package body (postfixed "__finalize_body") for controlled
object is not generated when it is generic package (and its spec does not need
finalizer ?).
See the attached file and run. I've expected for getting "OK" outputted by the
finalizer, but did not. And it works correctly if the controlled object
declaration is moved to its spec.
This bug also appeared with GNAT-GPL 2017.
--------
with x;
generic
package y is
pragma elaborate_body;
end y;
package body y is
object : x.t; -- this controlled object would not be finalized
end y;
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/82155] [7 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Wed, 15 Nov 2017 11:54:00 -0000
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--- Comment #8 from pmderodat at gcc dot gnu.org ---
Author: pmderodat
Date: Wed Nov 15 11:54:11 2017
New Revision: 254761
URL: https://gcc.gnu.org/viewcvs?rev=254761&root=gcc&view=rev
Log:
[PATCH] [PR82155] Fix crash in dwarf2out_abstract_function
Backport from mainline (r253147):
This patch is an attempt to fix the crash reported in PR82155.
When generating a C++ class method for a class that is itself nested in
a class method, dwarf2out_early_global_decl currently leaves the
existing context DIE as it is if it already exists. However, it is
possible that this call happens at a point where this context DIE is
just a declaration that is itself not located in its own context.
From there, if dwarf2out_early_global_decl is not called on any of the
FUNCTION_DECL in the context chain, DIEs will be left badly scoped and
some (such as the nested method) will be removed by the type pruning
machinery. As a consequence, dwarf2out_abstract_function will will
crash when called on the corresponding DECL because it asserts that the
DECL has a DIE.
This patch fixes this crash making dwarf2out_early_global_decl process
context DIEs the same way we process abstract origins for FUNCTION_DECL:
if the corresponding DIE exists but is only a declaration, call
dwarf2out_decl anyway on it so that it is turned into a more complete
DIE and so that it is relocated in the proper context.
Bootstrapped and regtested on x86_64-linux.
gcc/
PR debug/82155
* dwarf2out.c (dwarf2out_early_global_decl): Call dwarf2out_decl
on the FUNCTION_DECL function context if it has a DIE that is a
declaration.
gcc/testsuite/
* g++.dg/pr82155.C: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/pr82155.C
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dwarf2out.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:56:55 2017
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Subject: [Bug c++/46634] cp/typeck2.c: uses BITS_PER_UNIT in lieu of TYPE_PRECISION (char_type_node)
Date: Wed, 15 Nov 2017 11:56:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> (In reply to Jorn Wolfgang Rennecke from comment #0)
> >
>
> Um... bug report missing? Would help to have something more than the title...
No response; closing.
>From gcc-bugs-return-581786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:56:55 2017
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Subject: [Bug other/46633] [meta-bug] frontends use BITS_PER_UNIT when they mean TYPE_PRECISION (char_type_node)
Date: Wed, 15 Nov 2017 11:56:00 -0000
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Bug 46633 depends on bug 46634, which changed state.
Bug 46634 Summary: cp/typeck2.c: uses BITS_PER_UNIT in lieu of TYPE_PRECISION (char_type_node)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46634
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>From gcc-bugs-return-581788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 11:57:11 2017
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Subject: [Bug debug/82155] [7 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Wed, 15 Nov 2017 11:57:00 -0000
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Pierre-Marie de Rodat <derodat at adacore dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Pierre-Marie de Rodat <derodat at adacore dot com> ---
Fix is on trunk and I just merged it in the gcc-7 branch. I’ve left the target
milestone to 7.3 even though 7.4 is available since according to
https://gcc.gnu.org/gcc-7/, the last release was 7.2. Hoping I got it right!
>From gcc-bugs-return-581789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:01:14 2017
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Subject: [Bug fortran/42568] [Cygwin] BLOCKDATA referenced in EXTERNAL not loading from library
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |urbanjost at comcast dot net
--- Comment #35 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to urbanjost from comment #34)
> It still occurs with Cygwin 2.8.2, which comes with gfortran 5.4.0, which is
> the latest version of CygWin, if that is of any help.
>
> -----Original Message-----
> From: dominiq at lps dot ens.fr [mailto:gcc-bugzilla@gcc.gnu.org]
> Sent: Sunday, August 13, 2017 6:00 AM
> To: urbanjost@comcast.net
> Subject: [Bug fortran/42568] [Cygwin] BLOCKDATA referenced in EXTERNAL not
> loading from library
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42568
>
> --- Comment #34 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > So... what should we do with this bug then? I'm trying to move it out
> > of the WAITING queue. Change to SUSPENDED?
>
> I am afraid that SUSPENDED is some kind of black hole for problems waiting
> committee clarification. Here we are still waiting an answer from CygWin
> users if it is still present with recent releases.
>
> --
> You are receiving this mail because:
> You reported the bug.
Well... if I can't confirm it myself, and I can't put it in SUSPENDED, and I
can't mark it as RESOLVED... I guess I'll assign it to you then.
>From gcc-bugs-return-581790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:09:40 2017
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Subject: [Bug fortran/77517] ICE in conv_intrinsic_move_alloc, at fortran/trans-intrinsic.c:9517
Date: Wed, 15 Nov 2017 12:09:00 -0000
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The ICE for the test in comment 0 disappeared at r254605.
>From gcc-bugs-return-581791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:11:51 2017
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Subject: [Bug fortran/42568] [Cygwin] BLOCKDATA referenced in EXTERNAL not loading from library
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--- Comment #36 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Well... if I can't confirm it myself, and I can't put it in SUSPENDED,
> and I can't mark it as RESOLVED... I guess I'll assign it to you then.
An alternative would be to move the component from 'fortran' to 'target'.
>From gcc-bugs-return-581792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:27:22 2017
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I cannot check at the moment, but I remember changing
the KIND of mask arguments generated by the compiler to kind=1,
to save memory. This is quite a few years ago, the PR
to go with it escapes me at the moment.
Dunno if this helps.
>From gcc-bugs-return-581794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:28:13 2017
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82941] Missing vzeroupper with -march=skylake-avx512 -O2
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--- Comment #2 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Wed Nov 15 12:27:31 2017
New Revision: 254763
URL: https://gcc.gnu.org/viewcvs?rev=254763&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
2017-11-15 Sebastian Peryt <sebastian.peryt@intel.com>
gcc/
PR target/82941
PR target/82942
* config/i386/i386.c (pass_insert_vzeroupper): Modify gate condition
to return true on Xeon and not on Xeon Phi.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
* config/i386/i386.h: (host_detect_local_cpu): New define.
2017-11-15 Sebastian Peryt <sebastian.peryt@intel.com>
gcc/testsuite/
PR target/82941
PR target/82942
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: New test.
* gcc.target/i386/pr82942-1.c: New test.
* gcc.target/i386/pr82942-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82941-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82941-2.c
trunk/gcc/testsuite/gcc.target/i386/pr82942-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82942-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:28:08 2017
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Wed, 15 Nov 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942
--- Comment #7 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Wed Nov 15 12:27:31 2017
New Revision: 254763
URL: https://gcc.gnu.org/viewcvs?rev=254763&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
2017-11-15 Sebastian Peryt <sebastian.peryt@intel.com>
gcc/
PR target/82941
PR target/82942
* config/i386/i386.c (pass_insert_vzeroupper): Modify gate condition
to return true on Xeon and not on Xeon Phi.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
* config/i386/i386.h: (host_detect_local_cpu): New define.
2017-11-15 Sebastian Peryt <sebastian.peryt@intel.com>
gcc/testsuite/
PR target/82941
PR target/82942
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: New test.
* gcc.target/i386/pr82942-1.c: New test.
* gcc.target/i386/pr82942-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82941-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82941-2.c
trunk/gcc/testsuite/gcc.target/i386/pr82942-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82942-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:32:29 2017
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Subject: [Bug target/82990] Update the default -mzeroupper setting
Date: Wed, 15 Nov 2017 12:32:00 -0000
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Sebastian Peryt from comment #5)
> (In reply to H.J. Lu from comment #3)
> > Created attachment 42611 [details]
> > A better patch
> >
> > Sebastian, please take a look.
> LGTM
Can you run the full test with it?
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Wed, 15 Nov 2017 12:47:00 -0000
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42614
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42614&action=edit
Tentative patch
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
Date: Wed, 15 Nov 2017 12:51:00 -0000
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--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 15 12:50:39 2017
New Revision: 254766
URL: https://gcc.gnu.org/viewcvs?rev=254766&root=gcc&view=rev
Log:
2017-11-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/82985
Backport from mainline
2017-08-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/81790
* tree-ssa-sccvn.c (vn_lookup_simplify_result): Handle both
CONSTRUCTORs from simplifying and VN.
* gcc.dg/torture/pr81790.c: New testcase.
* g++.dg/torture/pr82985.C: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/torture/pr82985.C
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr81790.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-581797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 12:51:17 2017
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Subject: [Bug tree-optimization/81790] [8 Regression] ICE in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1738
Date: Wed, 15 Nov 2017 12:51:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 15 12:50:39 2017
New Revision: 254766
URL: https://gcc.gnu.org/viewcvs?rev=254766&root=gcc&view=rev
Log:
2017-11-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/82985
Backport from mainline
2017-08-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/81790
* tree-ssa-sccvn.c (vn_lookup_simplify_result): Handle both
CONSTRUCTORs from simplifying and VN.
* gcc.dg/torture/pr81790.c: New testcase.
* g++.dg/torture/pr82985.C: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/torture/pr82985.C
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr81790.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 15 12:53:21 2017
New Revision: 254767
URL: https://gcc.gnu.org/viewcvs?rev=254767&root=gcc&view=rev
Log:
2017-11-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/82985
* g++.dg/torture/pr82985.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr82985.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #20 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed. Thanks.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81574] ICE on valid C++14 code: in canonicalize_component_ref, at gimplify.c:2481
Date: Wed, 15 Nov 2017 13:18:00 -0000
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Nov 15 13:18:09 2017
New Revision: 254768
URL: https://gcc.gnu.org/viewcvs?rev=254768&root=gcc&view=rev
Log:
[PR c++/81574] lambda capture of function reference
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01200.html
PR c++/81574
* lambda.c (lambda_capture_field_type): Function references are
always catured by reference.
PR c++/81574
* g++.dg/cpp1y/pr81574.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/pr81574.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/lambda.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 13:19:25 2017
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Subject: [Bug c++/81574] ICE on valid C++14 code: in canonicalize_component_ref, at gimplify.c:2481
Date: Wed, 15 Nov 2017 13:19:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Resolved r254768.
>From gcc-bugs-return-581803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 13:38:49 2017
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Subject: [Bug target/80479] [7/8 Regression] strcmp() produces valgrind errors on ppc64le
Date: Wed, 15 Nov 2017 13:38:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
URL| |https://bugs.kde.org/show_b
| |ug.cgi?id=386945
Resolution|--- |MOVED
--- Comment #16 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Not a compiler bug. Moved to valgrind bugzilla:
https://bugs.kde.org/show_bug.cgi?id=386945
>From gcc-bugs-return-581804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 13:47:07 2017
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Subject: [Bug c++/83003] Using the detection idiom and void_t causes an error
Date: Wed, 15 Nov 2017 13:47:00 -0000
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Paul Keir <pkeir at outlook dot com> changed:
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----------------------------------------------------------------------------
CC| |pkeir at outlook dot com
--- Comment #1 from Paul Keir <pkeir at outlook dot com> ---
Created attachment 42615
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42615&action=edit
The code described in the bug
>From gcc-bugs-return-581805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:19:38 2017
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Subject: [Bug target/42568] [Cygwin] BLOCKDATA referenced in EXTERNAL not loading from library
Date: Wed, 15 Nov 2017 14:19:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i686-pc-cygwin
Component|fortran |target
--- Comment #37 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #36)
> > Well... if I can't confirm it myself, and I can't put it in SUSPENDED,
> > and I can't mark it as RESOLVED... I guess I'll assign it to you then.
>
> An alternative would be to move the component from 'fortran' to 'target'.
True, I guess I can do that, too...
>From gcc-bugs-return-581806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:20:34 2017
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Subject: [Bug middle-end/83004] New: [8 regression] gcc.dg/vect/pr81136.c fail
Date: Wed, 15 Nov 2017 14:20:00 -0000
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Bug ID: 83004
Summary: [8 regression] gcc.dg/vect/pr81136.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
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r254589 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/vect/pr81136.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -msse2 -ftree-vectorize -fno-vect-cost-model
-fno-common -O2 -fdump-tree-vect-details -S -o pr81136.s
PASS: gcc.dg/vect/pr81136.c (test for excess errors)
FAIL: gcc.dg/vect/pr81136.c scan-tree-dump-not vect "Unknown misalignment"
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-581807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:31:24 2017
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Subject: [Bug target/42568] [Cygwin] BLOCKDATA referenced in EXTERNAL not loading from library
Date: Wed, 15 Nov 2017 14:31:00 -0000
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--- Comment #38 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> True, I guess I can do that, too...
Well, let the assignee do it if (s)he does not accept the assignment.
>From gcc-bugs-return-581808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:33:38 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83005] New: [8 regression] gcc.dg/cpp/macsyntx.c, gcc.dg/cpp/sysmac1.c fails
Date: Wed, 15 Nov 2017 14:33:00 -0000
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Bug ID: 83005
Summary: [8 regression] gcc.dg/cpp/macsyntx.c,
gcc.dg/cpp/sysmac1.c fails
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254707 triggers these:
...
PASS: gcc.dg/cpp/macsyntx.c (test for errors, line 46)
PASS: gcc.dg/cpp/macsyntx.c (test for errors, line 50)
PASS: gcc.dg/cpp/macsyntx.c (test for errors, line 51)
FAIL: gcc.dg/cpp/macsyntx.c (test for warnings, line 54)
...
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/cpp/sysmac1.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -std=gnu99 -pedantic -Wtraditional
-ftrack-macro-expansion=0 -E -o sysmac1.i
PASS: gcc.dg/cpp/sysmac1.c (test for warnings, line 15)
PASS: gcc.dg/cpp/sysmac1.c (test for warnings, line 17)
PASS: gcc.dg/cpp/sysmac1.c (test for bogus messages, line 19)
PASS: gcc.dg/cpp/sysmac1.c (test for warnings, line 22)
PASS: gcc.dg/cpp/sysmac1.c (test for bogus messages, line 23)
FAIL: gcc.dg/cpp/sysmac1.c (test for warnings, line 25)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=slm --with-cpu=slm
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Wed, 15 Nov 2017 14:37:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #1 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Also seeing this: pr83005
Shall I mark my report as a duplicate?
>From gcc-bugs-return-581810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:38:57 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83003] Using the detection idiom and void_t causes an error
Date: Wed, 15 Nov 2017 14:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-15
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
template <template <class> class, class, class = void>
struct dtect1 { enum { value = 0 }; };
template <template <class> class TT, class T>
struct dtect1<TT, T, decltype(TT<T>{}, void())> { enum { value = 1 }; };
template <class T> struct Zod { using type = double; };
template <> struct Zod<int> { };
template <class T> using Zod_t = typename Zod<T>::type;
static_assert(!dtect1<Zod_t,int>::value, ""); // (1)
Zod_t<float> z1; // a double
Zod_t<int> z2; // !!
>From gcc-bugs-return-581811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:41:27 2017
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Subject: [Bug c++/60702] thread_local initialization
Date: Wed, 15 Nov 2017 14:41:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
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Last reconfirmed| |2017-11-15
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Known to fail| |6.4.0, 7.2.0, 8.0
>From gcc-bugs-return-581812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:41:49 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83006] New: [8 regression] gfortran.dg/pr78240.f90 fail
Date: Wed, 15 Nov 2017 14:41:00 -0000
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Bug ID: 83006
Summary: [8 regression] gfortran.dg/pr78240.f90 fail
Product: gcc
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r254718 triggers this:
spawn -ignore SIGHUP /work/gcc/testsuite/gfortran1/../../gfortran
-B/work/gcc/testsuite/gfortran1/../../
-B/work/x86_64-pc-linux-gnu/./libgfortran/
/source/gcc/testsuite/gfortran.dg/pr78240.f90 -fno-diagnostics-show-caret
-fdiagnostics-color=never -O -pedantic-errors -S -o pr78240.s
PASS: gfortran.dg/pr78240.f90 -O (test for errors, line 11)
FAIL: gfortran.dg/pr78240.f90 -O (test for excess errors)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=slm --with-cpu=slm
>From gcc-bugs-return-581813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 14:59:48 2017
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Subject: [Bug tree-optimization/83007] New: [8 Regression] -Wstringop-overflow false positive
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Bug ID: 83007
Summary: [8 Regression] -Wstringop-overflow false positive
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Isolated from ./libgomp/target.c:
$ cat target.c
#include <string.h>
#include <stdlib.h>
char *prefix;
char *suffix;
void a ()
{
char *next = 0;
char *cur;
char *plugin_name;
cur = "nvptx";
plugin_name = (char *) malloc (1 + (next ? next - cur : strlen (cur))
+ strlen (prefix) + strlen (suffix));
strcpy (plugin_name, prefix);
strncat (plugin_name, cur, next ? next - cur : strlen (cur));
strcat (plugin_name, suffix);
}
$ ./xgcc -B. target.c -O2 -Wall
target.c: In function ‘a’:
target.c:15:3: warning: ‘strncat’ specified bound 5 equals source length
[-Wstringop-overflow=]
strncat (plugin_name, cur, next ? next - cur : strlen (cur));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I think it's false positive as plugin_name is long enough.
Can you Martin please take a look?
>From gcc-bugs-return-581814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 15:24:02 2017
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Subject: [Bug fortran/83006] [8 regression] gfortran.dg/pr78240.f90 fail
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-15
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See https://gcc.gnu.org/ml/fortran/2017-11/msg00078.html.
>From gcc-bugs-return-581815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 15:30:45 2017
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Wed, 15 Nov 2017 15:30:00 -0000
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--- Comment #7 from Janne Blomqvist <jb at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #6)
> I cannot check at the moment, but I remember changing
> the KIND of mask arguments generated by the compiler to kind=1,
> to save memory. This is quite a few years ago, the PR
> to go with it escapes me at the moment.
>
> Dunno if this helps.
I've seen code doing this, but only for the forall and where statements, which
aren't present in this testcase. Neither are masks in any other statement. Or
am I missing something?
>From gcc-bugs-return-581816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 15:54:39 2017
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From: "sergey.shalnov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83008] New: [performance] Is it better to avoid extra instructions in data passing between loops?
Date: Wed, 15 Nov 2017 15:54:00 -0000
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Bug ID: 83008
Summary: [performance] Is it better to avoid extra instructions
in data passing between loops?
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I found strange code generated by GCC-8.0/7.x with following command line
options:
-g -Ofast -march=skylake-avx512 -ftree-vectorize
There are not vectorized two loops.
First one doesn’t vectorized because:
test.c:6:23: note: cost model: the vector iteration cost = 1488 divided by the
scalar iteration cost = 328 is greater or equal to the vectorization factor =
4.
test.c:6:23: note: not vectorized: vectorization not profitable.
test.c:6:23: note: not vectorized: vector version will never be profitable.
Second one doesn’t vectorized because:
test.c:20:23: note: step unknown.
test.c:20:23: note: reduction: not commutative/associative: sum_87 = (int) _61;
test.c:20:23: note: Unknown def-use cycle pattern.
test.c:20:23: note: Unsupported pattern.
test.c:20:23: note: not vectorized: unsupported use in stmt.
test.c:20:23: note: unexpected pattern.
If we look into asm we found strange method to passing data in “tmp†array
between loops:
…loop 1 body…
13f: 41 8d 04 13 lea (%r11,%rdx,1),%eax
143: c5 f9 6e d8 vmovd %eax,%xmm3
147: c5 e1 62 db vpunpckldq %xmm3,%xmm3,%xmm3
14b: c5 f9 62 c0 vpunpckldq %xmm0,%xmm0,%xmm0
14f: c5 f1 62 c9 vpunpckldq %xmm1,%xmm1,%xmm1
153: c5 e9 62 d2 vpunpckldq %xmm2,%xmm2,%xmm2
157: c5 e9 6c d2 vpunpcklqdq %xmm2,%xmm2,%xmm2
15b: c5 f1 6c c9 vpunpcklqdq %xmm1,%xmm1,%xmm1
15f: c5 f9 6c c0 vpunpcklqdq %xmm0,%xmm0,%xmm0
163: c5 e1 6c db vpunpcklqdq %xmm3,%xmm3,%xmm3
167: c4 e3 6d 38 c9 01 vinserti128 $0x1,%xmm1,%ymm2,%ymm1
16d: c4 e3 7d 38 c3 01 vinserti128 $0x1,%xmm3,%ymm0,%ymm0
173: 62 f3 f5 48 3a c0 01 vinserti64x4 $0x1,%ymm0,%zmm1,%zmm0
17a: 62 f1 fd 48 7f 44 24 vmovdqa64 %zmm0,-0x40(%rsp)
181: ff
182: 8b 54 24 e0 mov -0x20(%rsp),%edx
186: 03 54 24 f0 add -0x10(%rsp),%edx
…loop 2 body…
if I'm not mistaken the algorithm looks like following:
1. Do first loop and keep values in GPR
2. Move these GPRs to XMMs
3. Pack these XMMs into YMMs
4. Pack these YMMs to ZMM
5. Spill ZMM into stack
6. Get values from stack to GPRs of the second loop
It might be better, from performance perspective, to pass values from first
loop directly to the second loop with GPRs (without all these vector
registers)?
The reproducer is:
1 int test(unsigned char * input1, unsigned char * input2)
2 {
3 unsigned int tmp[4][4];
4 unsigned int var0, var1, var2, var3;
5 int sum = 0;
6 for (int i = 0; i < 4; i++, input1 += 4, input2 += 4) {
7 var0 = (input1[0] + input2[0]) + (input1[4] + input2[4]);
8 var1 = (input1[1] + input2[1]) + (input1[5] + input2[5]);
9 var2 = (input1[2] + input2[2]) + (input1[6] + input2[6]);
10 var3 = (input1[3] + input2[3]) + (input1[7] + input2[7]);
11 int inter0 = var0 + var1;
12 int inter1 = var0 + var1;
13 int inter2 = var2 + var3;
14 int inter3 = var2 + var3;
15 tmp[i][0] = inter0 + inter2;
16 tmp[i][2] = inter0 + inter2;
17 tmp[i][1] = inter1 + inter3;
18 tmp[i][3] = inter1 + inter3;
19 }
20 for (int i = 0; i < 4; i++) {
21 int inter0 = tmp[0][i] + tmp[1][i];
22 int inter1 = tmp[0][i] + tmp[1][i];
23 int inter2 = tmp[2][i] + tmp[3][i];
24 int inter3 = tmp[2][i] + tmp[3][i];
25 var0 = inter0 + inter2;
26 var2 = inter0 + inter2;
27 var1 = inter1 + inter3;
28 var3 = inter1 + inter3;
29 sum += var0 + var1 + var2 + var3;
30 }
31
32 return sum;
33 }
Sergey
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83008] [performance] Is it better to avoid extra instructions in data passing between loops?
Date: Wed, 15 Nov 2017 15:58:00 -0000
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--- Comment #1 from sergey.shalnov at intel dot com ---
Created attachment 42616
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42616&action=edit
reproducer
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Subject: [Bug c/82963] -Waddress too trigger happy
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |manu at gcc dot gnu.org
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--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Michal Hocko from comment #0)
> While the warning is correct and the given mask will always resolve to the
> success path of the ternary operator I really fail to see why we should warn
> about this fact. I really do not see any potential problem which could be
> caused by this fact.
The source code says:
c-common.c-3292- /* Common Ada/Pascal programmer's mistake. */
c-common.c-3293- warning_at (location,
c-common.c-3294- OPT_Waddress,
c-common.c:3295: "the address of %qD will always
evaluate as %<true%>",
The work-around you found is probably the intended work-around. It would be
good to document this. Care to send a patch?
https://gcc.gnu.org/contribute.html#docchanges
> Moreover the warning itself is quite inconsistent. E.g. the following warns
> about the explicit &m but not for n. So I believe this is more of a
> suboptimal warning implementation than real intention.
This is because the warning is given in the front-end, which does not know the
value of n. Not that it matters much, this is really trying to catch a typo,
not the actual value of a pointer.
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Subject: [Bug tree-optimization/82726] ICE in verify_ssa during GIMPLE pass: pcom
Date: Wed, 15 Nov 2017 16:17:00 -0000
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--- Comment #4 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:16:49 2017
New Revision: 254777
URL: https://gcc.gnu.org/viewcvs?rev=254777&root=gcc&view=rev
Log:
PR tree-optimization/82726
Revert
2017-01-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/70754
* tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE.
(reassociate_to_the_same_stmt): New parameter INSERT_BEFORE. Insert
combined stmt before it if not NULL.
(combine_chains): Process refs reversely and compute dominance point
for root ref.
Revert
2017-02-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/79663
* tree-predcom.c (combine_chains): Process refs in reverse order
only for ZERO length chains, and add explaining comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-predcom.c
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Subject: [Bug tree-optimization/70754] [6 Regression] ICE during predictive commoning
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--- Comment #18 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:16:49 2017
New Revision: 254777
URL: https://gcc.gnu.org/viewcvs?rev=254777&root=gcc&view=rev
Log:
PR tree-optimization/82726
Revert
2017-01-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/70754
* tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE.
(reassociate_to_the_same_stmt): New parameter INSERT_BEFORE. Insert
combined stmt before it if not NULL.
(combine_chains): Process refs reversely and compute dominance point
for root ref.
Revert
2017-02-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/79663
* tree-predcom.c (combine_chains): Process refs in reverse order
only for ZERO length chains, and add explaining comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-predcom.c
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Subject: [Bug tree-optimization/79663] [7 Regression] r244815 causes 10% regression for spec1k/172.mgrid on AArch64
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--- Comment #7 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:16:49 2017
New Revision: 254777
URL: https://gcc.gnu.org/viewcvs?rev=254777&root=gcc&view=rev
Log:
PR tree-optimization/82726
Revert
2017-01-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/70754
* tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE.
(reassociate_to_the_same_stmt): New parameter INSERT_BEFORE. Insert
combined stmt before it if not NULL.
(combine_chains): Process refs reversely and compute dominance point
for root ref.
Revert
2017-02-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/79663
* tree-predcom.c (combine_chains): Process refs in reverse order
only for ZERO length chains, and add explaining comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-predcom.c
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Subject: [Bug middle-end/24639] [meta-bug] bug to track all Wuninitialized issues
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Bug 24639 depends on bug 82958, which changed state.
Bug 82958 Summary: uninitialized used warning missed (loop representation, do-while)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82958
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
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Subject: [Bug middle-end/82958] uninitialized used warning missed (loop representation, do-while)
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
Summary|uninitialized used warning |uninitialized used warning
|missed when variable is |missed (loop
|both in function argument |representation, do-while)
|and return value within a |
|loop |
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
To detect uninitialized values within a loop, you need at least -O1, even if at
least one iteration of the loop is always executed.
*** This bug has been marked as a duplicate of bug 54554 ***
>From gcc-bugs-return-581823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 16:20:51 2017
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/54554] fails to warn for uninitialized var within loop always taken at -O0
Date: Wed, 15 Nov 2017 16:20:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |danielgutson at gmail dot com
--- Comment #10 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 82958 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-581826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 16:20:58 2017
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70754] [6 Regression] ICE during predictive commoning
Date: Wed, 15 Nov 2017 16:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70754
--- Comment #19 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:20:21 2017
New Revision: 254778
URL: https://gcc.gnu.org/viewcvs?rev=254778&root=gcc&view=rev
Log:
PR tree-optimization/82726
PR tree-optimization/70754
* tree-predcom.c (order_drefs_by_pos): New function.
(combine_chains): Move code setting has_max_use_after to...
(try_combine_chains): ...here. New parameter. Sort combined chains
according to position information.
(tree_predictive_commoning_loop): Update call to above function.
(update_pos_for_combined_chains, pcom_stmt_dominates_stmt_p): New.
gcc/testsuite
* gcc.dg/tree-ssa/pr82726.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr82726.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-predcom.c
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Subject: [Bug tree-optimization/82726] ICE in verify_ssa during GIMPLE pass: pcom
Date: Wed, 15 Nov 2017 16:20:00 -0000
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--- Comment #5 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:20:21 2017
New Revision: 254778
URL: https://gcc.gnu.org/viewcvs?rev=254778&root=gcc&view=rev
Log:
PR tree-optimization/82726
PR tree-optimization/70754
* tree-predcom.c (order_drefs_by_pos): New function.
(combine_chains): Move code setting has_max_use_after to...
(try_combine_chains): ...here. New parameter. Sort combined chains
according to position information.
(tree_predictive_commoning_loop): Update call to above function.
(update_pos_for_combined_chains, pcom_stmt_dominates_stmt_p): New.
gcc/testsuite
* gcc.dg/tree-ssa/pr82726.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr82726.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-predcom.c
>From gcc-bugs-return-581827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 16:28:04 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83009] New: [8 regression] gcc.target/aarch64/store_v2vec_lanes.c fails with -mabi=ilp32
Date: Wed, 15 Nov 2017 16:28:00 -0000
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Bug ID: 83009
Summary: [8 regression] gcc.target/aarch64/store_v2vec_lanes.c
fails with -mabi=ilp32
Product: gcc
Version: 8.0
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Hi,
As reported in https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01213.html ,
the new gcc.target/aarch64/store_v2vec_lanes.c fails when using -abi=ilp32.
Kyrill said:
My patch does indeed fail to generate the optimised sequence for -mabi=ilp32.
During combine it fails to match:
Failed to match this instruction:
(set (mem:V2DF (plus:DI (reg/v/f:DI 79 [ z ])
(const_int 32 [0x20])) [1 MEM[(v2df *)z_8(D) + 32B]+0 S16 A128])
(vec_concat:V2DF (reg:DF 81 [ y0 ])
(reg:DF 84 [ y1 ])))
but without the -mabi=ilp32 it does successfully match the equivalent
(set (mem:V2DF (plus:DI (reg:DI 1 x1 [ z ])
(const_int 32 [0x20])) [1 MEM[(v2df *)z_8(D) + 32B]+0 S16 A128])
(vec_concat:V2DF (reg:DF 81 [ y0 ])
(reg:DF 84 [ y1 ])))
The only difference is the index register being the hard reg x1.
There's probably some subtlety in aarch64_classify_address that I'll need to
dig into.
>From gcc-bugs-return-581828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 16:30:01 2017
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Subject: [Bug target/83009] [8 regression] gcc.target/aarch64/store_v2vec_lanes.c fails with -mabi=ilp32
Date: Wed, 15 Nov 2017 16:30:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-15
Assignee|unassigned at gcc dot gnu.org |ktkachov at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Thanks, confirmed.
>From gcc-bugs-return-581829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 16:30:39 2017
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Subject: [Bug c++/82101] Uninitialized variable detection failed with variables in for loop
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Dup of some existing bug for sure. t looks like initialized to GCC on the
> backedge:
Not any that I know.
> but that gets later optimistically propagated away (the variable is dead
> anyway)
> and thus the late pass warning about maybe-uninitialized doesn't get here.
Does the late pass ever warn for self-initialization?
void foo(int);
int main(){
for(int i = 0 ; i < 10 ; i ++){
int t=t;
foo(t);
}
return 0;
}
> Now what is special here is that the uninit value is on the loop entry edge
> so the early pass _could_ warn.
This seems the bug indeed.
void foo(void);
int main(){
for(int i = 0 ; i < 10 ; i ++){
int t=t;
foo();
}
return 0;
}
> It also looks like we could improve on scoping here when re-writing into SSA.
> t doesn't need a PHI node as the value is not live over the backedge.
missed-opt then?
>From gcc-bugs-return-581830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:10:14 2017
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Subject: [Bug c++/83005] [8 regression] gcc.dg/cpp/macsyntx.c, gcc.dg/cpp/sysmac1.c fails
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David Edelsohn <dje at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-581831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:11:46 2017
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Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
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--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> ---
*** Bug 83005 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-581832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:11:46 2017
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Subject: [Bug c++/83005] [8 regression] gcc.dg/cpp/macsyntx.c, gcc.dg/cpp/sysmac1.c fails
Date: Wed, 15 Nov 2017 18:11:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> ---
Duplicate.
*** This bug has been marked as a duplicate of bug 82997 ***
>From gcc-bugs-return-581833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:12:15 2017
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Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Wed, 15 Nov 2017 18:12:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-15
CC| |dje at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-581834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:13:18 2017
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Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
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--- Comment #4 from David Edelsohn <dje at gcc dot gnu.org> ---
Andrey reports that this starts with r254707
>From gcc-bugs-return-581835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:14:51 2017
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Subject: [Bug fortran/78240] ICE in match_clist_expr, at fortran/decl.c:728
Date: Wed, 15 Nov 2017 18:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78240
--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Nov 15 18:14:14 2017
New Revision: 254780
URL: https://gcc.gnu.org/viewcvs?rev=254780&root=gcc&view=rev
Log:
2017-11-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78240
gfortran.dg/pr78240.f90: Prune run-on errors.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr78240.f90
>From gcc-bugs-return-581837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:21:46 2017
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Subject: [Bug fortran/78240] ICE in match_clist_expr, at fortran/decl.c:728
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #7 from Fritz Reese <foreese at gcc dot gnu.org> ---
*** Bug 83006 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-581836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:21:45 2017
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Subject: [Bug fortran/83006] [8 regression] gfortran.dg/pr78240.f90 fail
Date: Wed, 15 Nov 2017 18:21:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #2 from Fritz Reese <foreese at gcc dot gnu.org> ---
> Author: kargl
> Date: Wed Nov 15 18:14:14 2017
> New Revision: 254780
>
> URL: https://gcc.gnu.org/viewcvs?rev=254780&root=gcc&view=rev
> Log:
> 2017-11-15 Steven G. Kargl <kargl@gcc.gnu.org>
>
> PR fortran/78240
> gfortran.dg/pr78240.f90: Prune run-on errors.
>
> Modified:
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/gfortran.dg/pr78240.f90
Consequence of faulty test case from fortran/78240 in r254718, fixed in r254780
*** This bug has been marked as a duplicate of bug 78240 ***
>From gcc-bugs-return-581838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:27:38 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Wed, 15 Nov 2017 18:27:00 -0000
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Jakub's patch is
<https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01041.html>.
>From gcc-bugs-return-581839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 18:39:29 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83007] [8 Regression] -Wstringop-overflow false positive
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
A common mistake with strncat is to specify as the bound the source of the
source string (instead of the remaining space in the destination), as in:
char d[8] = "1234";
const char *s = "4567";
strncat (d, s, strlen (s));
where the strncat call overflows the destination.
Something similar happens in the test case in comment #0, except there the
amount of space in the destination isn't as obvious. The checker tries to
compute the size of the destination to see if the call can overflow but that
computation fails (it happens too early, before the size is available). So out
of an abundance of caution, the checker points out that the bound equals the
source length, before the strncat call is folded into memcpy. Unfortunately,
there is no way to avoid the warning without either compromising its efficacy
(i.e., causing false negatives for buggy code), or without delaying the folding
into memcpy to a point where the destination size is available (delaying the
folding is not a favorable solution).
That being said, the intended and recommended practice is to call strncat with
the amount of space remaining in the destination, e.g., like so:
strncat (d, s, sizeof d - strlen (d) - 1);
In the test case in comment #0, strncat is being used to do two things: either
a) to append the initial portion of the string at cur without the terminating
nul and b) as a shortcut to to append the full nul-terminated string string
cur. (a) is the intended use case, but (b) is not. With that in mind,
changing the code to separate the two use cases like so avoids the warning:
if (next)
strncat (plugin_name, cur, next - cur);
else
strcpy (plugin_name, cur);
Another alternative is to use sprintf to combine all three calls into one:
sprintf (plugin_name, "%s%.*s%s", prefix,
next ? (int)(next - cur) : -1, cur,
suffix);
I would suggest either of these also makes the code clearer.
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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--- Comment #9 from Jim Wilson <wilson at gcc dot gnu.org> ---
Jakub's patch fixes the optimization problem with the testcase.
I tried a linux kernel build with the patched compiler and the provided .config
file. I still see some __multi3 calls. However, looking at the code, I see in
lib/mpi/ several files with calls to umul_ppmm from a longlong.h file similar
to the one in gcc, that has
#if (defined(__mips) && __mips >= 3) && W_TYPE_SIZE == 64
#if (__GNUC__ >= 5) || (__GNUC__ >= 4 && __GNUC_MINOR__ >= 4)
#define umul_ppmm(w1, w0, u, v) \
do { \
typedef unsigned int __ll_UTItype __attribute__((mode(TI))); \
__ll_UTItype __ll = (__ll_UTItype)(u) * (v); \
w1 = __ll >> 64; \
w0 = __ll; \
} while (0)
#elif ...
So this is self inflicted damage, as this is an explicit TImode multiply for
gcc 5 and later.
This requires either a linux kernel longlong.h fix to use an alternate macro
definition for mips targets that don't directly support TImode multiply. Or
else it requires a gcc mips maintainer to fix the mips backend to add multi3
support for mips64r6. Either one should be possible by emitting two multiply
instructions, one for the high part and one for the low part.
Or it requires adding a mips assembly __multi3 function to the linux kernel.
Or maybe the config file can be modified to drop the mpi support?
>From gcc-bugs-return-581841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 19:15:43 2017
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Wed, 15 Nov 2017 19:15:00 -0000
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--- Comment #10 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 42617
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42617&action=edit
mips64r6 linux kernel .config file
Linux kernel config file to reproduce the linux kernel link failure.
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Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Wed, 15 Nov 2017 19:27:00 -0000
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--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jim Wilson from comment #9)
> This requires either a linux kernel longlong.h fix to use an alternate macro
> definition for mips targets that don't directly support TImode multiply. Or
> else it requires a gcc mips maintainer to fix the mips backend to add multi3
> support for mips64r6. Either one should be possible by emitting two
> multiply instructions, one for the high part and one for the low part.
The middle-end has support already for mult_highpart optab, low is the same as
mult optab (for the smaller mode), emitting this from the expr.c should be easy
to add rather than changing most of the back-ends to add a multi3 optab.
>From gcc-bugs-return-581843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 19:31:35 2017
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82990] Update the default -mzeroupper setting
Date: Wed, 15 Nov 2017 19:31:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed Nov 15 19:30:58 2017
New Revision: 254783
URL: https://gcc.gnu.org/viewcvs?rev=254783&root=gcc&view=rev
Log:
i386: Add X86_TUNE_EMIT_VZEROUPPER
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
gcc/
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper::gate): Remove
TARGET_AVX512ER check.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h (TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
gcc/testsuite/
PR target/82990
* gcc.target/i386/pr82942-2.c: Add -mtune=knl.
* gcc.target/i386/pr82990-1.c: New test.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82990-1.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-2.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-3.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-4.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-5.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-6.c
trunk/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/config/i386/x86-tune.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr82942-2.c
>From gcc-bugs-return-581844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 19:35:11 2017
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Subject: [Bug target/82990] Update the default -mzeroupper setting
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.
>From gcc-bugs-return-581845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 20:05:05 2017
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Subject: [Bug tree-optimization/82985] [7 Regression] ICC: in vn_nary_build_or_lookup_1, at tree-ssa-sccvn.c:1722
Date: Wed, 15 Nov 2017 20:05:00 -0000
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--- Comment #21 from BlenderEi at LwTV dot de ---
Thank you for your fast actions.
Best regards!
>From gcc-bugs-return-581846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 20:06:10 2017
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
Date: Wed, 15 Nov 2017 20:06:00 -0000
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
What I meant was this part of resolve_mask_arg :
/* In the library, we access the mask with a GFC_LOGICAL_1
argument. No need to waste memory if we are about to create
a temporary array. */
if (mask->expr_type == EXPR_OP && mask->ts.kind != 1)
{
ts.type = BT_LOGICAL;
ts.kind = 1;
gfc_convert_type_warn (mask, &ts, 2, 0);
>From gcc-bugs-return-581847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 20:33:31 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #24 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Thanks. I can confirm it works for me!
But it doesn't for me. What does -march=native expand to on your machine?
>From gcc-bugs-return-581848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 20:54:50 2017
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Subject: [Bug debug/83010] New: DW_AT_location is not emitted for thread local variable
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Bug ID: 83010
Summary: DW_AT_location is not emitted for thread local
variable
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$ cat 1.c
__thread int a_thread_local;
$ gcc -g -c 1.c -o 1.o
$ readelf -wi ./1.o
....
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
<c> DW_AT_producer : (indirect string, offset: 0x38): GNU C17
8.0.0 20171102 (experimental) -mlittle-endian -mabi=lp64 -g
<10> DW_AT_language : 12 (ANSI C99)
<11> DW_AT_name : 1.c
<15> DW_AT_comp_dir : (indirect string, offset: 0x0): gdb
<19> DW_AT_stmt_list : 0x0
<1><1d>: Abbrev Number: 2 (DW_TAG_variable)
<1e> DW_AT_name : (indirect string, offset: 0x29): a_thread_local
<22> DW_AT_decl_file : 1
<23> DW_AT_decl_line : 1
<24> DW_AT_decl_column : 14
<25> DW_AT_type : <0x29>
<29> DW_AT_external : 1
DW_AT_location is missing, so GDB can't locate this variable. However, on arm
and x86_64, DW_AT_location is emitted.
x86_64:
<1><1d>: Abbrev Number: 2 (DW_TAG_variable)
<1e> DW_AT_name : (indirect string, offset: 0x3e): a_thread_local
<22> DW_AT_decl_file : 1
<23> DW_AT_decl_line : 1
<24> DW_AT_type : <0x33>
<28> DW_AT_external : 1
<28> DW_AT_location : 10 byte block: e 0 0 0 0 0 0 0 0 e0
(DW_OP_const8u: 0 0; DW_OP_GNU_push_tls_address or DW_OP_HP_unknown)
arm:
<1><1d>: Abbrev Number: 2 (DW_TAG_variable)
<1e> DW_AT_name : (indirect string, offset: 0xa2): a_thread_local
<22> DW_AT_decl_file : 1
<23> DW_AT_decl_line : 1
<24> DW_AT_type : <0x2f>
<28> DW_AT_external : 1
<28> DW_AT_location : 6 byte block: c 0 0 0 0 e0
(DW_OP_const4u: 0; DW_OP_GNU_push_tls_address or DW_OP_HP_unknown)
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Subject: [Bug testsuite/82988] [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C fail
Date: Wed, 15 Nov 2017 20:57:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Nov 15 20:57:10 2017
New Revision: 254786
URL: https://gcc.gnu.org/viewcvs?rev=254786&root=gcc&view=rev
Log:
PR testsuite/82988 - g++.dg/cpp0x/lambda/lambda-switch.C fail
gcc/testsuite/ChangeLog:
PR testsuite/82988
* g++.dg/cpp0x/lambda/lambda-switch.C: Prune unimportant warning.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C
>From gcc-bugs-return-581849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 20:57:35 2017
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Subject: [Bug testsuite/82988] [8 regression] g++.dg/cpp0x/lambda/lambda-switch.C fail
Date: Wed, 15 Nov 2017 20:57:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Test adjusted in r254786.
>From gcc-bugs-return-581851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 21:05:56 2017
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Subject: [Bug bootstrap/82831] [8 Regression] Broken PGO bootstrap on i586-linux-gnu after r254379
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--- Comment #25 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Ryzen is -march=znver1.
>From gcc-bugs-return-581852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 21:33:50 2017
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From: "julien at trigofacile dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83011] New: -Wformat-truncation wrongly computes length (depends on the position of numbers in the addition)
Date: Wed, 15 Nov 2017 21:33:00 -0000
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Bug ID: 83011
Summary: -Wformat-truncation wrongly computes length (depends
on the position of numbers in the addition)
Product: gcc
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Hi,
Trying to build INN, I encounter the following warning:
timer.c: Dans la fonction « TMRsummary »:
timer.c:395:37: error: la sortie de la directive « » peut être tronquée en
écrivant 1 octet dans une région dont la taille est comprise entre 0 et 1
[-Werror=format-truncation=]
rc = snprintf(buf, len, "%s ", prefix);
~
timer.c:395:12: note: « snprintf » écrit 2 octets ou plus (3 supposé) dans une
destination dont la taille est 1
rc = snprintf(buf, len, "%s ", prefix);
~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It happens in:
https://inn.eyrie.org/trac/browser/trunk/lib/timer.c
len = 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix)) + 1;
buf = xmalloc(len);
off = 0;
if (prefix == NULL)
rc = 0;
else
rc = snprintf(buf, len, "%s ", prefix);
If I rewrite len this way, gcc no longer gives the above warning:
len = 1 + 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix));
Isn't there a computation issue? (depending on the location of components in
the addition)
Julien
>From gcc-bugs-return-581853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 22:14:52 2017
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
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--- Comment #5 from neil.n.carlson at gmail dot com ---
I've built the svn trunk and tested the examples with it. The ICEs with the
comment 2 and 3 examples are gone, as Dominique found. The comment 1 example
continues to segfault when executed, as does the comment 2 example now. The
comment 3 example executes without error. I think Dominique swapped 2 and 3.
>From gcc-bugs-return-581854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 22:38:25 2017
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Subject: [Bug target/79868] aarch64: diagnostic "malformed target %s value" not translateable
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Steve Ellcey <sje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #11 from Steve Ellcey <sje at gcc dot gnu.org> ---
Fixed on Tot for 8.0.
>From gcc-bugs-return-581855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 23:20:10 2017
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Subject: [Bug c/80354] Poor support to silence -Wformat-truncation=1
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John Steele Scott <toojays at toojays dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |toojays at toojays dot net
--- Comment #6 from John Steele Scott <toojays at toojays dot net> ---
(In reply to Stephan Bergmann from comment #5)
> (In reply to Martin Sebor from comment #3)
> > The warning does just what it's designed to do: point out the potential
> > unhandled truncation.
>
> But it is unusable in practice if there is no reliable way to silence false
> positives.
^^^^^----- This!
A simple cast-to-void is the conventional way to indicate to the compiler that
it should consider the value as having been consumed even though it wasn't
really. It's a real shame if this information is not available to the code that
generates this warning.
(In reply to Martin Sebor from comment #1)
> Besides actually handling the truncation (e.g., branching on
> it and taking some action that does affect the behavior), storing the return
> value in a volatile variable and reading it should suppress it.
Thanks for the tip. For isolated instances this may be less invasive than what
I have been contemplating (checking the return value and calling some no-op
function). It would be better if there were some solution that didn't generate
unnecessary code though.
>From gcc-bugs-return-581856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 15 23:46:06 2017
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Subject: [Bug fortran/83012] New: Simply contiguous pointer function not recognized as contiguous
Date: Wed, 15 Nov 2017 23:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83012
Bug ID: 83012
Summary: Simply contiguous pointer function not recognized as
contiguous
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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In the following example the pointer assignment "p => x%dataptr()" is rejected
because the compiler does not recognize the function result x%dataptr() as
contiguous when in fact it is simply contiguous by definition. Note that there
is no error if the dummy variable x is declared as type(x) instead of class(x).
FWIW, the 6.4.1 compiler has no problems with this example.
module mod
type :: foo
integer, pointer, contiguous :: p(:)
contains
procedure :: dataptr
end type
contains
function dataptr(this) result(dp)
class(foo), intent(in) :: this
integer, pointer, contiguous :: dp(:)
dp => this%p
end function
end module
subroutine bar(x)
use mod
class(foo) :: x
integer, pointer, contiguous :: p(:)
p => x%dataptr()
end subroutine
The error message:
$ gfortran --version
GNU Fortran (GCC) 8.0.0 20171115 (experimental)
$ gfortran -c bug.f90
bug.f90:19:7:
p => x%dataptr()
1
Error: Assignment to contiguous pointer from non-contiguous target at (1)
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83011] -Wformat-truncation wrongly computes length (depends on the position of numbers in the addition)
Date: Thu, 16 Nov 2017 00:09:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-16
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I cannot reproduce any warnings with the INN function (extracted from timer.c),
either with the top of trunk (GCC 8) or with the top of GCC 7-branch. Can you
provide a preprocessed translation unit (the result of compiling timer.c with
-E instead of -c), and the compiler options?
I think in English the note would read like:
snprintf output 2 or more bytes (assuming 3) into a destination of size 1
This is issued when the output is in some range where the lower bound would fit
but the upper bound would not. Since the string is an argument and the buffer
size depends on timer_count which also unknown it's not clear to me what the
range is being determined from. Are you using -flto to build the project?
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Thu, 16 Nov 2017 00:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981
--- Comment #12 from Jim Wilson <wilson at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #11)
> (In reply to Jim Wilson from comment #9)
> > This requires either a linux kernel longlong.h fix to use an alternate macro
> > definition for mips targets that don't directly support TImode multiply. Or
> > else it requires a gcc mips maintainer to fix the mips backend to add multi3
> > support for mips64r6. Either one should be possible by emitting two
> > multiply instructions, one for the high part and one for the low part.
>
> The middle-end has support already for mult_highpart optab, low is the same
> as mult optab (for the smaller mode), emitting this from the expr.c should
> be easy to add rather than changing most of the back-ends to add a multi3
> optab.
This is mips specific code in the kernel to do a multi3 (actually I think
mulditi3). So this isn't a generic gcc problem affecting all targets. If you
don't want the kernel doing this, then fix the kernel.
The mips port already has a mulditi3 pattern, it is just lacking mips64r6
support. It looks like an oversight that should be fixed.
You are right that expand_expr could synthesize a mulditi3 if muldi3_highpart
is available, but it isn't clear if that is the right fix. Note that if we
adopt this solution, then effectively you are forcing backends to implement a
muldi3_highpart pattern. How is this any different than forcing them to
implement a mulditi3 pattern? That doesn't make any sense.
Also, note, that Jakub patch generates muldi3_highpart is mulditi3 fails. If
we fix mulditi3 expansion to call muldi3_highpart, then that appears to make
part of Jakub's patch unnecessary.
I think it would be better to fix the mips mulditi3 pattern, or fix the kernel
umul_ppmm macro to avoid the problem.
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From: "kyukhin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82983] [8 Regression] ICE in extract_insn, at recog.c:2305 w/ GFMI
Date: Thu, 16 Nov 2017 06:15:00 -0000
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--- Comment #1 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Thu Nov 16 06:14:54 2017
New Revision: 254797
URL: https://gcc.gnu.org/viewcvs?rev=254797&root=gcc&view=rev
Log:
Fix GFNI check which didn't work properly in gfni+sse case
gcc/
PR target/82983
* config/i386/gfniintrin.h: Add sse check.
* config/i386/i386.c (ix86_expand_builtin): Fix gfni check.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/gfniintrin.h
trunk/gcc/config/i386/i386.c
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From: "nathan at nathanrossi dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83013] MicroBlaze - #ident - Error: operation combines symbols in different segments
Date: Thu, 16 Nov 2017 06:54:00 -0000
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--- Comment #1 from nathan at nathanrossi dot com ---
Created attachment 42619
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42619&action=edit
output assembly
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From: "nathan at nathanrossi dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83013] New: MicroBlaze - #ident - Error: operation combines symbols in different segments
Date: Thu, 16 Nov 2017 06:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83013
Bug ID: 83013
Summary: MicroBlaze - #ident - Error: operation combines
symbols in different segments
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 42618
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42618&action=edit
pre-processed source
When compiling certain code which uses the #ident directive the output assembly
is broken with content being located in .sdata2 instead of .text.
See attached pre-processed basename.i from the shadow package.
microblazeel-oe-linux-gcc \
-mcpu=v10.0 -mlittle-endian -mxl-barrel-shift -mxl-pattern-compare
-mxl-reorder \
-mno-xl-soft-mul -mxl-multiply-high -mno-xl-soft-div -mhard-float \
-O2 -g -c \
-o basename.o \
-save-temps \
basename.i
basename.s: Assembler messages:
basename.s:961: Error: operation combines symbols in different segments
basename.s:962: Error: operation combines symbols in different segments
basename.s:965: Error: operation combines symbols in different segments
basename.s:966: Error: operation combines symbols in different segments
basename.s:969: Error: operation combines symbols in different segments
basename.s:970: Error: operation combines symbols in different segments
basename.s:976: Error: operation combines symbols in different segments
basename.s:977: Error: operation combines symbols in different segments
basename.s:980: Error: operation combines symbols in different segments
basename.s:981: Error: operation combines symbols in different segments
basename.s:987: Error: operation combines symbols in different segments
basename.s:988: Error: operation combines symbols in different segments
basename.s:991: Error: operation combines symbols in different segments
basename.s:992: Error: operation combines symbols in different segments
basename.s:997: Error: operation combines symbols in different segments
basename.s:998: Error: operation combines symbols in different segments
As can be seen in the output basename.s, the section is setup to be .text at
the beginning, but is switched to .sdata2 for the ident content but then never
changed back to .text.
.text
$Ltext0:
#APP
.sdata2
.ascii "$Id$\0"
#NO_APP
.align 2
.globl Basename
$LFB35:
$LM1:
.ent Basename
.type Basename, @function
Basename:
.frame r1,32,r15 # vars= 0, regs= 1, args= 24
.mask 0x00088000
$LVL0:
addik r1,r1,-32
Which results in the $LVL0-$Ltext0 (and others) crossing sections.
This may be a duplicate of a previously reported bug.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63261
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From: "nathan at nathanrossi dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83013] MicroBlaze - #ident - Error: operation combines symbols in different segments
Date: Thu, 16 Nov 2017 07:01:00 -0000
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--- Comment #2 from nathan at nathanrossi dot com ---
One solution to this bug is to remove the microblaze specific emission of ident
use the default which emits .ident directives for the assembler.
I've sent a patch which makes this change:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01279.html
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/83007] [8 Regression] -Wstringop-overflow false positive
Date: Thu, 16 Nov 2017 08:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-581865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 08:06:45 2017
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From: "mhocko at kernel dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82963] -Waddress too trigger happy
Date: Thu, 16 Nov 2017 08:06:00 -0000
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--- Comment #3 from Michal Hocko <mhocko at kernel dot org> ---
(In reply to Manuel López-Ibáñez from comment #2)
[...]
> > Moreover the warning itself is quite inconsistent. E.g. the following warns
> > about the explicit &m but not for n. So I believe this is more of a
> > suboptimal warning implementation than real intention.
>
> This is because the warning is given in the front-end, which does not know
> the value of n. Not that it matters much, this is really trying to catch a
> typo, not the actual value of a pointer.
Would it be possible to skip the warning for macros at least?
>From gcc-bugs-return-581866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 08:10:36 2017
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83012] [8 Regression] Simply contiguous pointer function not recognized as contiguous
Date: Thu, 16 Nov 2017 08:10:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-16
CC| |tkoenig at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|Simply contiguous pointer |[8 Regression] Simply
|function not recognized as |contiguous pointer function
|contiguous |not recognized as
| |contiguous
Ever confirmed|0 |1
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This was probably me. Apparently, the test for simply contiguous
does not catch this case.
I'll take a look.
>From gcc-bugs-return-581867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 08:13:45 2017
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Subject: [Bug target/83008] [performance] Is it better to avoid extra instructions in data passing between loops?
Date: Thu, 16 Nov 2017 08:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-* i?86-*-*
CC| |hubicka at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The strange code is because we perform basic-block vectorization resulting in
vect_cst__249 = {_251, _251, _251, _251, _334, _334, _334, _334, _417, _417,
_417, _417, _48, _48, _48, _48};
MEM[(unsigned int *)&tmp] = vect_cst__249;
_186 = tmp[0][0];
_185 = tmp[1][0];
...
which for some reason is deemed profitable:
t.c:32:12: note: Cost model analysis:
Vector inside of basic block cost: 24
Vector prologue cost: 64
Vector epilogue cost: 0
Scalar cost of basic block: 192
t.c:32:12: note: Basic block will be vectorized using SLP
what is odd is that the single vector store is costed 24 while the 16 scalar
int stores are costed 192. The vector build from scalar costs 64.
I guess Honzas cost-model tweaks might have gone wrong here or we're hitting an
oddity in the SLP costing.
Even if it looks strange maybe the sequence _is_ profitable?
The second loop would be vectorized if 'sum' was unsigned.
>From gcc-bugs-return-581868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 08:55:00 2017
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From: "ghjghj530-bubu at yahoo dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/83014] New: ICE in pretty-print with -fsanitize=bounds
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Bug ID: 83014
Summary: ICE in pretty-print with -fsanitize=bounds
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: ghjghj530-bubu at yahoo dot de
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Compiling the following testcode leads to an internal compiler error
int setArrayElemment()
{
int data[5];
data[5] = 0;
return data[0];
}
int main()
{
}
Compile with GCC 6.3 or 5.3
gcc.exe C:\temp\test.cpp -c -fsanitize=bounds
or
gcc.exe C:\temp\test.cpp -c -fsanitize=undefined
Leads to:
c:\temp\test.cpp: In function 'int setArrayElemment()':
c:\temp\test.cpp:1:5: internal compiler error: in pp_format, at
pretty-print.c:630
int setArrayElemment()
^~~~~~~~~~~~~~~~
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
c:\temp\test.cpp:1:5: internal compiler error: Aborted
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
>From gcc-bugs-return-581869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:03:41 2017
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83015] New: [8 regression] bootstrap comparison failure on ia64
Date: Thu, 16 Nov 2017 09:03:00 -0000
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Bug ID: 83015
Summary: [8 regression] bootstrap comparison failure on ia64
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: schwab@linux-m68k.org
CC: hubicka at ucw dot cz
Target Milestone: ---
Target: ia64-*-*
ia64 fails to bootstrap since r254636.
Comparing stages 2 and 3
warning: gcc/cc1objplus-checksum.o differs
warning: gcc/cc1obj-checksum.o differs
Bootstrap comparison failure!
gcc/ipa-icf.o differs
gcc/tree-sra.o differs
gcc/cp/name-lookup.o differs
gcc/cp/tree.o differs
gcc/cp/pt.o differs
gcc/cp/constexpr.o differs
gcc/cp/cp-gimplify.o differs
gcc/cp/cxx-pretty-print.o differs
gcc/cp/cp-objcp-common.o differs
gcc/cp/parser.o differs
gcc/var-tracking.o differs
gcc/tree-vect-generic.o differs
gcc/tree-vect-stmts.o differs
gcc/go/expressions.o differs
gcc/go/statements.o differs
gcc/go/types.o differs
gcc/cfgbuild.o differs
gcc/tree-chkp.o differs
gcc/function.o differs
gcc/tree-ssa-sccvn.o differs
gcc/fold-const.o differs
gcc/emit-rtl.o differs
gcc/tree-ssa-uninit.o differs
gcc/lto/lto.o differs
gcc/tree-vrp.o differs
gcc/ipa-fnsummary.o differs
gcc/tree.o differs
gcc/tree-data-ref.o differs
gcc/fibonacci_heap.o differs
gcc/tree-into-ssa.o differs
gcc/gcov.o differs
gcc/tree-ssa-loop-im.o differs
gcc/varasm.o differs
gcc/tree-eh.o differs
gcc/builtins.o differs
gcc/tree-vect-slp.o differs
gcc/tree-ssa-reassoc.o differs
gcc/tree-switch-conversion.o differs
gcc/c/c-parser.o differs
gcc/objcp/objc-next-runtime-abi-02.o differs
gcc/loop-unroll.o differs
gcc/tree-inline.o differs
gcc/tree-cfg.o differs
gcc/omp-low.o differs
gcc/tree-if-conv.o differs
gcc/dse.o differs
gcc/trans-mem.o differs
gcc/except.o differs
gcc/cfgexpand.o differs
gcc/tree-vect-patterns.o differs
gcc/hsa-gen.o differs
gcc/gimple-fold.o differs
gcc/tree-nested.o differs
gcc/ipa-cp.o differs
gcc/simplify-rtx.o differs
gcc/ipa-devirt.o differs
gcc/tree-vect-loop.o differs
gcc/graphite-isl-ast-to-gimple.o differs
gcc/objc/objc-next-runtime-abi-02.o differs
gcc/tree-vect-data-refs.o differs
gcc/gimple-match.o differs
gcc/tree-ssa-loop-prefetch.o differs
gcc/ipa-prop.o differs
gcc/tree-tailcall.o differs
gcc/passes.o differs
gcc/multiple_target.o differs
gcc/predict.o differs
gcc/dwarf2out.o differs
gcc/tree-ssa-loop-niter.o differs
$ diff -u <(nm stage{2,3}-gcc/tree-ssa.o)
--- /dev/fd/63 2017-11-12 12:13:17.607494656 +0100
+++ /dev/fd/62 2017-11-12 12:13:17.607494656 +0100
@@ -131,9 +131,9 @@
00000000000003b0 t _ZL15gimple_call_argPK6gimplej.part.69
00000000000009c0 t _ZL15verify_ssa_nameP9tree_nodeb
00000000000004d0 t _ZL16op_iter_init_defP11ssa_op_iterP6gimplei.part.76
-0000000000001ec0 t _ZL16op_iter_next_defP11ssa_op_iter
+0000000000001a80 t _ZL16op_iter_next_defP11ssa_op_iter
00000000000005e0 t _ZL17gimple_assign_lhsPK6gimple.part.85
-0000000000001a80 t _ZL17op_iter_next_treeP11ssa_op_iter
+0000000000001e40 t _ZL17op_iter_next_treeP11ssa_op_iter
0000000000000470 t
_ZL18first_imm_use_stmtP16imm_use_iteratorP9tree_node.part.75
0000000000000580 t _ZL18gimple_assign_rhs1PK6gimple.part.83
0000000000000ec0 t _ZL18maybe_optimize_varP9tree_nodeP11bitmap_headS2_S2_
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83016
Bug ID: 83016
Summary: gnat1: warning: command line option ‘-nostdinc++’ is
valid for C++/ObjC++ but not for Ada
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: aldot at gcc dot gnu.org
CC: charlet at adacore dot com, derodat at adacore dot com,
ebotcazou at libertysurf dot fr
Target Milestone: ---
When bootstrapping trunk @253865 (for example, IIRC occurs since quite some
time now):
xg++ -c -gnatA -gnatWb -gnatiw -B/scratch/obj.x86_64/gcc-8.0.mine/./gcc/
-nostdinc++ -nostdinc++
-I/scratch/obj.x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/scratch/obj.x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/scratch/src/gcc-8.0.mine/libstdc++-v3/libsupc++
-I/scratch/src/gcc-8.0.mine/libstdc++-v3/include/backward
-I/scratch/src/gcc-8.0.mine/libstdc++-v3/testsuite/util
-B/scratch/obj.x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/scratch/obj.x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/opt/x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/bin/
-B/opt/x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/lib/ -isystem
/opt/x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/include -isystem
/opt/x86_64/gcc-8.0.mine/x86_64-pc-linux-gnu/sys-include -static-libstdc++
-static-libgcc -I- -I../rts -I. -I/scratch/src/gcc-8.0.mine/gcc/ada
-static-libstdc++ -static-libgcc -gnatws
/scratch/obj.x86_64/gcc-8.0.mine/gcc/ada/tools/b~gnatcmd.adb
gnat1: warning: command line option ‘-nostdinc++’ is valid for C++/ObjC++ but
not for Ada
ISTM the driver should filter out -nostdinc++ for ADA (or gnat1 should silently
ignore it)
>From gcc-bugs-return-581871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:08:19 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
Date: Thu, 16 Nov 2017 09:08:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-16
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce on linux. Can you please add '--verbose' flag?
Can you please attach output (pre-processed source filE) of -E?
>From gcc-bugs-return-581872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:19:35 2017
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
Date: Thu, 16 Nov 2017 09:19:00 -0000
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--- Comment #2 from ghjghj530-bubu at yahoo dot de ---
Thanks for your quick response:
Compiling with --verbose:
Using built-in specs.
COLLECT_GCC=i686-elf-gcc.exe
Target: i686-elf
Configured with: ../gcc-6.3.0/configure --prefix=/opt/V6.3.0 --target=i686-elf
--with-pic --with-newlib --enable-languag
ray --disable-nls --disable-shared --disable-multilib --disable-threads
--disable-tls --disable-win32-registry --enable-
-pointer --disable-__cxa_atexit --disable-libgomp --disable-libquadmath
--disable-libssp --disable-libada --disable-libi
--disable-libstdcxx-visibility --with-default-libstdcxx-abi=gcc4-compatible
--without-headers : (reconfigured) ../gcc-6
6.3.0 --target=i686-elf --with-pic --with-newlib --enable-languages=c,c++
--disable-initfini-array --disable-nls --disab
-disable-threads --disable-tls --disable-win32-registry
--enable-sjlj-exceptions --enable-frame-pointer --disable-__cxa_
able-libquadmath --disable-libssp --disable-libada --disable-libitm
--disable-libstdcxx-verbose --disable-libstdcxx-visi
x-abi=gcc4-compatible --with-headers
Thread model: single
gcc version 6.3.0 (GCC)
COLLECT_GCC_OPTIONS='-c' '-fsanitize=undefined' '-v' '-mtune=generic'
'-march=pentiumpro'
C:/gnuinst/v6.3.0/bin/../libexec/gcc/i686-elf/6.3.0/cc1plus.exe -quiet -v
-iprefix c:
k\as\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/ c:\temp\test.cpp -quiet
-dumpbase test.cpp -mtune=generic -march=pent
-fsanitize=undefined -o C:\Users\grosst\AppData\Local\Temp\ccVWHL7C.s
GNU C++14 (GCC) version 6.3.0 (i686-elf)
compiled by GNU C version 5.3.0, GMP version 5.1.2, MPFR version 3.1.2,
MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/../../
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/.
+/6.3.0"
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/.
+/6.3.0/i686-elf"
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/.
+/6.3.0/backward"
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/i
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/i
ignoring nonexistent directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0
ude"
ignoring duplicate directory
"C:/gnuinst/v6.3.0/lib/gcc/../../lib/gcc/i686-elf/6.3.0/.
#include "..." search starts here:
#include <...> search starts here:
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/../../../../i686-elf/include/c++/6.3.
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/../../../../i686-elf/include/c++/6.3.
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/../../../../i686-elf/include/c++/6.3.
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/include
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/include-fixed
C:\gnuinst\v6.3.0\bin\../lib/gcc/i686-elf/6.3.0/../../../../i686-elf/include
End of search list.
GNU C++14 (GCC) version 6.3.0 (i686-elf)
compiled by GNU C version 5.3.0, GMP version 5.1.2, MPFR version 3.1.2,
MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: b10cc2d805285f11263a2d3a4a7dce91
c:\temp\test.cpp: In function 'int setArrayElemment()':
c:\temp\test.cpp:1:5: internal compiler error: in pp_format, at
pretty-print.c:630
int setArrayElemment()
^~~~~~~~~~~~~~~~
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
c:\temp\test.cpp:1:5: internal compiler error: Aborted
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
i686-elf-gcc.exe: internal compiler error: Aborted (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Compiling with -E:
# 1 "c:\\temp\\test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "c:\\temp\\test.cpp"
int setArrayElemment()
{
int data[5];
data[5] = 0;
return data[0];
}
int main()
{
}
>From gcc-bugs-return-581873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:24:55 2017
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, so it's i686 target. What operation system is that?
>From gcc-bugs-return-581874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:30:42 2017
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
And can you please run it in debugger in order to display back-trace?
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--- Comment #1 from Pierre-Marie de Rodat <derodat at adacore dot com> ---
I can’t reproduce with “--enable-languages=c,c++,ada --disable-multilib
--disable-libsanitizer†on trunk r254797. Do you use specific options?
>From gcc-bugs-return-581877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:55:48 2017
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--- Comment #2 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> ---
../../src/gcc-8.0.mine/configure \
-v \
--enable-languages=c,fortran,c++,go,objc,obj-c++,lto,ada \
CFLAGS='-O0 -g3 -ggdb3 ' \
CXXFLAGS='-O0 -g3 -ggdb3 ' \
'BOOT_CFLAGS=-O0 -g3 -ggdb3 ' \
'BOOT_CXXFLAGS=-O0 -g3 -ggdb3 ' \
'CFLAGS_FOR_TARGET=-O0 -g3 -ggdb3 ' \
'CXXFLAGS_FOR_TARGET=-O0 -g3 -ggdb3 ' \
--prefix=/opt/x86_64/gcc-8.0.mine// \
--enable-shared \
--without-system-zlib \
--enable-nls \
--without-included-gettext \
--enable-threads=posix \
--enable-__cxa_atexit \
--enable-libstdcxx-allocator=mt \
--enable-clocale=gnu \
--enable-libstdcxx-debug \
--enable-mpfr \
--disable-werror \
--enable-checking=yes \
--enable-debug \
-C \
--disable-intermodule \
--enable-multilib \
--disable-libstdcxx-pch \
--enable-bootstrap \
--enable-checking=yes \
--with-cpu=native \
--with-tune=native \
--enable-plugin
make bootstrap
>From gcc-bugs-return-581876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 09:55:02 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
Date: Thu, 16 Nov 2017 09:55:00 -0000
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--- Comment #5 from ghjghj530-bubu at yahoo dot de ---
The OS is Windows 7, 64-bit.
Unfortunately i don't use the debug-version of GCC and can therefore not
provide a detailed backtrace right now. Maybe next week.
Note that my original message contains at least the error position "pp_format,
at pretty-print.c:630"
The problems also occurs with this version of GCC:
Target: mingw32
Configured with: ../src/gcc-5.3.0/configure --build=x86_64-pc-linux-gnu
--host=m
ingw32 --prefix=/mingw --disable-win32-registry --target=mingw32
--with-arch=i58
6 --enable-languages=c,c++,objc,obj-c++,fortran,ada --enable-static
--enable-sha
red --enable-threads --with-dwarf2 --disable-sjlj-exceptions
--enable-version-sp
ecific-runtime-libs --with-libintl-prefix=/mingw --enable-libstdcxx-debug
--with
-tune=generic --enable-libgomp --disable-libvtv --enable-nls : (reconfigured)
..
/src/gcc-5.3.0/configure --build=x86_64-pc-linux-gnu --host=mingw32
--prefix=/mi
ngw --disable-win32-registry --target=mingw32 --with-arch=i586
--enable-language
s=c,c++,objc,obj-c++,fortran,ada --enable-static --enable-shared
--enable-thread
s --with-dwarf2 --disable-sjlj-exceptions
--enable-version-specific-runtime-libs
--with-libiconv-prefix=/mingw --with-libintl-prefix=/mingw
--enable-libstdcxx-d
ebug --with-tune=generic --enable-libgomp --disable-libvtv --enable-nls
Thread model: win32
gcc version 5.3.0 (GCC)
>From gcc-bugs-return-581878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 10:09:04 2017
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Thu, 16 Nov 2017 10:09:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-16
CC| |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am trying to reproduce it - so far I have learnt that compile farm computer
listed as itanium is not, so bootstrap passed there.
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Subject: [Bug c++/70383] Bogus error when attempting to capture a reference to function by copy
Date: Thu, 16 Nov 2017 10:37:00 -0000
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--- Comment #1 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Nov 16 10:36:51 2017
New Revision: 254808
URL: https://gcc.gnu.org/viewcvs?rev=254808&root=gcc&view=rev
Log:
2017-11-16 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70383
* g++.dg/cpp0x/lambda/lambda-70383.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-70383.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 10:39:09 2017
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Subject: [Bug c++/70383] Bogus error when attempting to capture a reference to function by copy
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed by the patch which fixed c++/81574.
>From gcc-bugs-return-581881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 10:52:36 2017
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From: "cfztol at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83017] New: DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 10:52:00 -0000
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Bug ID: 83017
Summary: DO CONCURRENT not parallelizing
Product: gcc
Version: 6.2.0
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Priority: P3
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I found a strange behaviour, which I think is a bug. I'm trying to split a loop
with DO CONCURRENT and compile flag -ftree-parallelize-loops=2 . However,
whether parallelization actually happens depends on whether I use a computed
vector index in an assignment or a constant index. The indexing happens inside
a pure function, so I believe that should not affect the outer do concurrent
loop (?)
Here's my test code
! compile:
! gfortran -Ofast -march=native -ftree-parallelize-loops=2 -o main main.f90
! run;
! time ./main
program main
use, intrinsic :: iso_fortran_env
implicit none
integer, parameter :: nsplit = 4
integer(int64), parameter :: ne = 2000000000
integer(int64) :: stride, low(nsplit), high(nsplit), i
real, dimension(nsplit) :: pi
stride = ceiling(real(ne)/nsplit)
do i = 1, nsplit
high(i) = stride*i
end do
do i = 2, nsplit
low(i) = high(i-1) + 1
end do
low(1) = 1
high(nsplit) = ne
pi = 0
do concurrent (i = 1:nsplit)
pi(i) = sum(compute( low(i), high(i) ))
end do
print *, "PI", 4*sum(pi)
print *, "PI", 4*atan(1.0)
contains
pure function compute( low, high ) result( tmp )
integer(int64), intent(in) :: low, high
real, dimension(nsplit) :: tmp
integer(int64) :: j, k
tmp = 0
! With this loop no parallelization happens
do j = low, high
k = mod( j, nsplit ) + 1
tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
end do
! With this loop the code is parallelized (apparent from time study)
! do j = low, high, 4 ! nsplit is equal to 4
! k = 1
! tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
! k = 2
! tmp(k) = tmp(k) + (-1)**(j+2) / real( 2*j+1 )
! k = 3
! tmp(k) = tmp(k) + (-1)**(j+3) / real( 2*j+3 )
! k = 4
! tmp(k) = tmp(k) + (-1)**(j+4) / real( 2*j+5 )
! end do
end function
end program main
>From gcc-bugs-return-581882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 10:57:43 2017
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Thu, 16 Nov 2017 10:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 11:12:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-16
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.9 up to trunk (8.0).
For the record, there is probably a bug in 4.8.5: the executable does not stop
(at least in a reasonable time).
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We fail to analyze dependeces here
Considering loop 6
loop is innermost
Creating dr for MEM[(real(kind=4)[0:D.3539] *)&A.7][_85]
analyze_innermost: Applying pattern match.pd:84, generic-match.c:11356
failed: evolution of offset is not affine.
base_address:
offset from base address:
constant offset from base address:
step:
aligned to:
base_object: MEM[(real(kind=4)[0:D.3539] *)&A.7]
Access function 0: scev_not_known;
Creating dr for MEM[(real(kind=4)[0:D.3539] *)&A.7][_85]
analyze_innermost: Applying pattern match.pd:84, generic-match.c:11356
failed: evolution of offset is not affine.
base_address:
offset from base address:
constant offset from base address:
step:
aligned to:
base_object: MEM[(real(kind=4)[0:D.3539] *)&A.7]
Access function 0: scev_not_known;
(compute_affine_dependence
stmt_a: _90 = MEM[(real(kind=4)[0:D.3539] *)&A.7][_85];
stmt_b: MEM[(real(kind=4)[0:D.3539] *)&A.7][_85] = _99;
Data ref a:
#(Data Ref:
# bb: 7
# stmt: _90 = MEM[(real(kind=4)[0:D.3539] *)&A.7][_85];
# ref: MEM[(real(kind=4)[0:D.3539] *)&A.7][_85];
# base_object: MEM[(real(kind=4)[0:D.3539] *)&A.7];
# Access function 0: scev_not_known;
#)
Data ref b:
#(Data Ref:
# bb: 7
# stmt: MEM[(real(kind=4)[0:D.3539] *)&A.7][_85] = _99;
# ref: MEM[(real(kind=4)[0:D.3539] *)&A.7][_85];
# base_object: MEM[(real(kind=4)[0:D.3539] *)&A.7];
# Access function 0: scev_not_known;
#)
affine dependence test not usable: access function not affine or constant.
) -> dependence analysis failed
...
this is because
k = mod( j, nsplit ) + 1
makes the k index not an affine function.
<bb 7> [85.00%]:
# j_205 = PHI <_87(8), _82(6)>
_85 = j_205 % 4;
_87 = j_205 + 1;
_90 = MEM[(real(kind=4)[0:D.3539] *)&A.7][_85];
_91 = _87 << 1;
_92 = _91 & 2;
_93 = 1 - _92;
_94 = (real(kind=4)) _93;
_95 = j_205 * 2;
_96 = _95 + -1;
_97 = (real(kind=4)) _96;
_98 = _94 / _97;
_99 = _90 + _98;
MEM[(real(kind=4)[0:D.3539] *)&A.7][_85] = _99;
if (_83 < _87)
goto <bb 10>; [15.00%]
else
goto <bb 8>; [85.00%]
what the middle-end could do is remove the modulo and instead build an
inner loop (which might then be unrolled as your commented code shows).
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Subject: [Bug tree-optimization/71026] Missing division optimizations
Date: Thu, 16 Nov 2017 11:55:00 -0000
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--- Comment #9 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Thu Nov 16 11:54:49 2017
New Revision: 254816
URL: https://gcc.gnu.org/viewcvs?rev=254816&root=gcc&view=rev
Log:
Canonicalize constant multiplies in division
This patch implements some of the optimizations discussed in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71026.
Canonicalize x / (C1 * y) into (x * C2) / y.
This moves constant multiplies out of the RHS of a division in order
to allow further simplifications (such as (C1 * x) / (C2 * y) ->
(C3 * x) / y) and to enable more reciprocal CSEs.
2017-11-16 Wilco Dijkstra <wdijkstr@arm.com>
Jackson Woodruff <jackson.woodruff@arm.com>
gcc/
PR tree-optimization/71026
* match.pd: Canonicalize constant multiplies in division.
gcc/testsuite/
PR tree-optimization/71026
* gcc.dg/cse_recip.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/cse_recip.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/81060] [8 Regression] ICE with un-expanded parameter pack
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Thu Nov 16 12:11:36 2017
New Revision: 254817
URL: https://gcc.gnu.org/viewcvs?rev=254817&root=gcc&view=rev
Log:
[PR c++/81060] ICE with invalid initialzer via lambda
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01323.html
PR c++/81060
* decl.c (xref_tag_1): Push lambda into current scope.
* name-lookup.c (do_pushtag): Don't deal with ts_lambda here.
PR c++81060
* g++.dg/cpp0x/lambda/lambda-template13.C: Avoid undefined
template using local type error.
* g++.dg/cpp0x/pr81060.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr81060.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-template13.C
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r254817.
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Subject: [Bug c++/79331] ICE on valid C++14 code (with initialized lambda capture) on x86_64-linux-gnu: in canonicalize_component_ref, at gimplify.c:2451
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
This is the same as 81574 and now fixed:
PR c++/81574
* lambda.c (lambda_capture_field_type): Function references are
always catured by reference.
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #3 from Christian Felter <cfztol at hotmail dot com> ---
Ultimately, I wanted to compute k like this
k = permutation( j )
where permutation is a 1D array of integers (from 1 to 4, e.g. [ 1, 4, 2, 1, 3,
... etc] ). This would allow an easy way of parallelizing the so-called "finite
element assembly procedure". But I guess, this case is even harder. Clearly, I
must have misunderstood the requirements for DO CONCURRENT... Maybe they could
be relaxed ?
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 16, 2017 1:22:37 PM GMT+01:00, cfztol at hotmail dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
>
>--- Comment #3 from Christian Felter <cfztol at hotmail dot com> ---
>Ultimately, I wanted to compute k like this
>
>k = permutation( j )
>
>where permutation is a 1D array of integers (from 1 to 4, e.g. [ 1, 4,
>2, 1, 3,
>... etc] ). This would allow an easy way of parallelizing the so-called
>"finite
>element assembly procedure". But I guess, this case is even harder.
>Clearly, I
>must have misunderstood the requirements for DO CONCURRENT... Maybe
>they could
>be relaxed ?
It's more an optimization pass issue or the frontend not communicating
guarantees for dependencies downstream. Might be a bit tricky for function
calls.
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Sorry, but I can't reproduce on linux with cross compiler for mingw32.
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 13:22:00 -0000
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--- Comment #5 from Christian Felter <cfztol at hotmail dot com> ---
Okay, sounds like there is hope. By the way, the problem also exists without a
function call. Declaring
real, dimension(nsplit) :: tmp
and replacing the loop with
do concurrent (i = 1:nsplit)
tmp = 0
do j = low(i), high(i)
k = mod( j, nsplit ) + 1
tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
end do
pi(i) = sum(tmp)
end do
also inhibits parallelization.
>From gcc-bugs-return-581892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 13:22:54 2017
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Subject: [Bug c++/83003] Using the detection idiom and void_t causes an error
Date: Thu, 16 Nov 2017 13:22:00 -0000
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--- Comment #3 from ensadc at mailnesia dot com ---
There doesn't even need to be a specialization of Zod.
template <template <class> class, class = void>
struct dtect1 { enum { value = 0 }; };
template <template <class> class TT>
struct dtect1<TT, decltype(TT<int>{}, void())> { enum { value = 1 }; };
template <class T> struct Zod { };
template <class T> using Zod_t = typename Zod<T>::type;
static_assert(!dtect1<Zod_t>::value, "");
Zod_t<int> z2; // !!
>From gcc-bugs-return-581894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 13:27:38 2017
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Subject: [Bug c++/83000] Constraints for union-templates do not work
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--- Comment #1 from ensadc at mailnesia dot com ---
Possible duplicate of issue 67217
>From gcc-bugs-return-581895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 13:29:06 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 13:29:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 16, 2017 2:22:50 PM GMT+01:00, cfztol at hotmail dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
>
>--- Comment #5 from Christian Felter <cfztol at hotmail dot com> ---
>Okay, sounds like there is hope. By the way, the problem also exists
>without a
>function call. Declaring
>
> real, dimension(nsplit) :: tmp
>
>and replacing the loop with
>
> do concurrent (i = 1:nsplit)
>
> tmp = 0
> do j = low(i), high(i)
> k = mod( j, nsplit ) + 1
> tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
> end do
> pi(i) = sum(tmp)
>
> end do
>
>also inhibits parallelization.
What does do concurrent guarantee?
>From gcc-bugs-return-581896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:05:46 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 14:05:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
If I "fix" GCC to consider the loop you annotate parallel:
do concurrent (i = 1:nsplit)
pi(i) = sum(compute( low(i), high(i) ))
end do
then we arrive at computing 4 iterations of that loop and with 2 threads
and MIN_PER_THREAD 100 (arbitrary define) we run into
if (!flag_loop_parallelize_all
&& !oacc_kernels_p
&& ((estimated != -1
&& estimated <= (HOST_WIDE_INT) n_threads * MIN_PER_THREAD)
/* Do not bother with loops in cold areas. */
|| optimize_loop_nest_for_size_p (loop)))
continue;
(estimated is 4). With -floop-parallelize-all I then get:
> ./f951 -quiet t.f90 -Ofast -ftree-parallelize-loops=2 -fdump-tree-parloops-details -floop-parallelize-all -fopt-info-loop
t.f90:28:0: note: loop with 5 iterations completely unrolled (header execution
count 375)
t.f90:26:0: note: loop with 5 iterations completely unrolled (header execution
count 1500)
t.f90:38:0: note: loop with 5 iterations completely unrolled (header execution
count 1500)
t.f90:18:0: note: loop with 4 iterations completely unrolled (header execution
count 375)
t.f90:15:0: note: loop with 5 iterations completely unrolled (header execution
count 375)
t.f90:26:0: note: parallelizing outer loop 3
t.f90:24:0: note: basic block vectorized
t.f90:41:0: note: basic block vectorized
t.f90:41:0: note: basic block vectorized
yay.
>From gcc-bugs-return-581897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:07:33 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42620
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42620&action=edit
patch
Otherwise untested patch. Note ivdep is mapped to safelen which isn't useful
for parallelization given safelen perserves forward dependences.
>From gcc-bugs-return-581898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:10:37 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42621
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updated patch
>From gcc-bugs-return-581899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:18:41 2017
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From: "kerukuro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83018] New: To support creation of header-only C++ libraries with SIMD optimization and dynamic dispatch, allow all intrinsics regardless of target architecture
Date: Thu, 16 Nov 2017 14:18:00 -0000
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Bug ID: 83018
Summary: To support creation of header-only C++ libraries with
SIMD optimization and dynamic dispatch, allow all
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Product: gcc
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Visual C++ already does this. Using Visual C++, I can use e.g. AVX2 intrinsics
in a program compiled with SSE2 target architecture and dispatch to that code
path dynamically if CPU supports AVX2. GCC requires compiling separate object
files to achieve that, which is not possible for header-only libraries.
>From gcc-bugs-return-581900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:28:43 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83019
Bug ID: 83019
Summary: Compiler dumps predictions with -nan%
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
Recent patch caused some dumps to dump -nam%.
One example is gcc.dg/graphite/interchange-12.c, which generates:
./cc1 -O2 -ffast-math -floop-nest-optimize -fdump-tree-graphite-all
interchange-12.c
interchange-12.c.150t.graphite:
...
Predictions for bb 29
first match heuristics: 99.0% exec 0 (estimated locally) hit 0 (estimated
locally) (-nan%)
combined heuristics: 99.0% exec 0 (estimated locally) hit 0 (estimated
locally) (-nan%)
loop iterations heuristics of edge 29->28: 1.0% exec 0 (estimated locally)
hit 0 (estimated locally) (-nan%)
Predictions for bb 30
1 edges in bb 30 predicted to even probabilities
Predictions for bb 28
first match heuristics: 99.0% exec 0 (estimated locally) hit 0 (estimated
locally) (-nan%)
combined heuristics: 99.0% exec 0 (estimated locally) hit 0 (estimated
locally) (-nan%)
loop iterations heuristics of edge 28->22: 1.0% exec 0 (estimated locally)
hit 0 (estimated locally) (-nan%)
...
The above dump was generated with x86_64-linux-gnu host. This is problematic
with hosts (e.g. alpha) that require -mieee when dealing with NaNs, resulting
in several ICEs [1].
The cause is the division 0/0 in:
Program received signal SIGFPE, Arithmetic exception.
0x00000001207a4ee4 in dump_prediction (file=0x121665bf0, predictor=<optimized
out>, probability=<optimized out>, bb=0x2000099df48, reason=<optimized o
ut>,
ep_edge=<optimized out>) at
/space/homedirs/uros/gcc-svn/trunk/gcc/predict.c:750
750 fprintf (file, " (%.1f%%)", e->count ().to_gcov_type() *
100.0
(gdb) bt
#0 0x00000001207a4ee4 in dump_prediction (file=0x121665bf0,
predictor=<optimized out>, probability=<optimized out>, bb=0x2000099df48,
reason=<optimized out>, ep_edge=<optimized out>) at
/space/homedirs/uros/gcc-svn/trunk/gcc/predict.c:750
#1 0x00000001207af424 in combine_predictions_for_bb (bb=0x2000099df48,
dry_run=<optimized out>) at /space/homedirs/uros/gcc-svn/trunk/gcc/predict.c:1
270
#2 0x00000001207b23d0 in tree_estimate_probability (dry_run=<optimized out>)
at /space/homedirs/uros/gcc-svn/trunk/gcc/predict.c:2819
#3 0x0000000120f6bf24 in graphite_transform_loops () at
/space/homedirs/uros/gcc-svn/trunk/gcc/graphite.c:425
#4 0x0000000120f6d374 in graphite_transforms (fun=0x12120fc31) at
/space/homedirs/uros/gcc-svn/trunk/gcc/graphite.c:447
#5 (anonymous namespace)::pass_graphite_transforms::execute (this=0x121665bf0,
fun=0x12120fc31) at /space/homedirs/uros/gcc-svn/trunk/gcc/graphite.c:
524
#6 0x000000012078b038 in execute_one_pass (pass=0x1214fe7c0) at
/space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2497
#7 0x000000012078bc08 in execute_pass_list_1 (pass=0x1214fe7c0) at
/space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2586
#8 0x000000012078bc24 in execute_pass_list_1 (pass=0x1214fe760) at
/space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2587
#9 0x000000012078bc24 in execute_pass_list_1 (pass=0x1214fe400) at
/space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2587
#10 0x000000012078bc24 in execute_pass_list_1 (pass=0x1214fd070) at
/space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2587
#11 0x000000012078bca4 in execute_pass_list (fn=<optimized out>,
pass=0x12120fc31) at /space/homedirs/uros/gcc-svn/trunk/gcc/passes.c:2597
#12 0x0000000120363804 in cgraph_node::expand (this=0x200009c8000) at
/space/homedirs/uros/gcc-svn/trunk/gcc/cgraphunit.c:2139
#13 0x00000001203652a0 in expand_all_functions () at
/space/homedirs/uros/gcc-svn/trunk/gcc/cgraphunit.c:2275
#14 symbol_table::compile (this=<optimized out>) at
/space/homedirs/uros/gcc-svn/trunk/gcc/cgraphunit.c:2623
#15 0x000000012036874c in compile (this=0x200008a4000) at
/space/homedirs/uros/gcc-svn/trunk/gcc/cgraphunit.c:2682
#16 symbol_table::finalize_compilation_unit (this=0x200008a4000) at
/space/homedirs/uros/gcc-svn/trunk/gcc/cgraphunit.c:2716
#17 0x00000001208a695c in compile_file () at
/space/homedirs/uros/gcc-svn/trunk/gcc/toplev.c:480
#18 0x000000012013ae90 in do_compile () at
/space/homedirs/uros/gcc-svn/trunk/gcc/toplev.c:2060
#19 toplev::main (this=0x11fdff040, argc=<optimized out>, argv=<optimized out>)
at /space/homedirs/uros/gcc-svn/trunk/gcc/toplev.c:2195
#20 0x000000012013cf60 in main (argc=<optimized out>, argv=0x11fdff168) at
/space/homedirs/uros/gcc-svn/trunk/gcc/main.c:39
(gdb) list
745 bb->count.dump (file);
746 if (e)
747 {
748 fprintf (file, " hit ");
749 e->count ().dump (file);
750 fprintf (file, " (%.1f%%)", e->count ().to_gcov_type() *
100.0
751 / bb->count.to_gcov_type ());
752 }
753 }
754
[1] https://gcc.gnu.org/ml/gcc-testresults/2017-11/msg01330.html
>From gcc-bugs-return-581901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:30:33 2017
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Subject: [Bug middle-end/83019] Compiler dumps predictions with -nan%
Date: Thu, 16 Nov 2017 14:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83019
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Adding CC.
>From gcc-bugs-return-581902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:48:35 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Thu, 16 Nov 2017 14:48:00 -0000
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--- Comment #16 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This also breaks 'make all-gnattools' in a bootstrap build:
g++ -std=gnu++98 -static-libstdc++ -static-libgcc -I- -I../rts -I.
-I/home/eric/svn/gcc/gcc/ada -static-libstdc++ -static-libgcc -DIN_GCC -g -O2
-W -Wall -o ../../gnatmake b_gnatm.o a-except.o ali.o ali-util.o aspects.o
s-casuti.o alloc.o atree.o binderr.o butil.o casing.o csets.o debug.o elists.o
einfo.o errout.o erroutc.o errutil.o err_vars.o fmap.o fname.o fname-uf.o
fname-sf.o gnatmake.o gnatvsn.o hostparm.o interfac.o i-c.o i-cstrin.o krunch.o
lib.o make.o makeusg.o make_util.o namet.o nlists.o opt.o osint.o osint-m.o
output.o restrict.o rident.o s-exctab.o s-secsta.o s-stalib.o s-stoele.o
scans.o scng.o sdefault.o sfn_scan.o s-purexc.o s-htable.o scil_ll.o sem_aux.o
sinfo.o sinput.o sinput-c.o snames.o stand.o stringt.o styleg.o stylesw.o
system.o validsw.o switch.o switch-m.o table.o targparm.o tempdir.o tree_io.o
types.o uintp.o uname.o urealp.o usage.o widechar.o ../link.o ../targext.o
../../ggc-none.o ../../libcommon-target.a ../../libcommon.a
../../../libcpp/libcpp.a ../rts/libgnat.a
../../../libbacktrace/.libs/libbacktrace.a ../../../libiberty/libiberty.a
-no-pie -ldl
g++: error: unrecognized command line option ‘-no-pie’
../gcc-interface/Makefile:2221: recipe for target '../../gnatmake' failed
make[2]: *** [../../gnatmake] Error 1
make[2]: Leaving directory '/home/eric/build/gcc/native/gcc/ada/tools'
Makefile:188: recipe for target 'gnattools-native' failed
make[1]: *** [gnattools-native] Error 2
make[1]: Leaving directory '/home/eric/build/gcc/native/gnattools'
Makefile:13917: recipe for target 'all-gnattools' failed
make: *** [all-gnattools] Error 2
During the bootstrap, CXX is set to /home/eric/build/gcc/native/./gcc/xg++
-B/home/eric/build/gcc/native/./gcc/ so this still works.
>From gcc-bugs-return-581903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 14:49:51 2017
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Subject: =?UTF-8?B?W0J1ZyBkcml2ZXIvODMwMTZdIGduYXQxOiB3YXJuaW5nOiBjb21tYW5kIGxp?= =?UTF-8?B?bmUgb3B0aW9uIOKAmC1ub3N0ZGluYysr4oCZIGlzIHZhbGlkIGZvciBDKysv?= =?UTF-8?B?T2JqQysrIGJ1dCBub3QgZm9yIEFkYQ==?Date: Thu, 16 Nov 2017 14:49:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-16
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Known old problem, gnatlink is invoked with:
/home/eric/build/gcc/native/gcc/ada/tools/gnatclean.ali
../../gnatlink -v gnatcmd -o ../../gnat \
--GCC="/home/eric/build/gcc/native/./gcc/xg++
-B/home/eric/build/gcc/native/./gcc/ -nostdinc++ -nostdinc++
-I/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/include/x86_64-suse-linux
-I/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/include
-I/home/eric/svn/gcc/libstdc++-v3/libsupc++
-I/home/eric/svn/gcc/libstdc++-v3/include/backward
-I/home/eric/svn/gcc/libstdc++-v3/testsuite/util
-L/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/src
-L/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/src/.libs
-L/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/libsupc++/.libs
-B/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/src/.libs
-B/home/eric/build/gcc/native/x86_64-suse-linux/libstdc++-v3/libsupc++/.libs
-B/home/eric/install/gcc/x86_64-suse-linux/bin/
-B/home/eric/install/gcc/x86_64-suse-linux/lib/ -isystem
/home/eric/install/gcc/x86_64-suse-linux/include -isystem
/home/eric/install/gcc/x86_64-suse-linux/sys-include -static-libstdc++
-static-libgcc -I- -I../rts -I. -I/home/eric/svn/gcc/gcc/ada -static-libstdc++
-static-libgcc " ../link.o ../targext.o ../../ggc-none.o
../../libcommon-target.a ../../libcommon.a ../../../libcpp/libcpp.a
../rts/libgnat.a ../../../libbacktrace/.libs/libbacktrace.a
../../../libiberty/libiberty.a -no-pie
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Subject: [Bug c++/82836] [8 Regression] ICE on valid code
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--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Thu Nov 16 14:54:54 2017
New Revision: 254823
URL: https://gcc.gnu.org/viewcvs?rev=254823&root=gcc&view=rev
Log:
[PATCH] New lang hook
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01340.html
PR c++/82836
PR c++/82737
* tree.h (COPY_DECL_RTL): Rename parms for clarity.
(SET_DECL_ASSEMBLER_NAME): Forward to
overwrite_decl_assembler_name.
(COPY_DECL_ASSEMBLER_NAME): Rename parms for clarity.
(overwrite_decl_assembler_name): Declare.
* tree.c (overwrite_decl_assembler_name): New.
* langhooks-def.h (lhd_overwrite_decl_assembler_name): Declare.
(LANG_HOOKS_OVERWRITE_DECL_ASSEMBLER_NAME): Provide default.
(LANG_HOOKS_INITIALIZER): Add it.
* langhooks.h (struct lang_hooks): Add overwrite_decl_assembler_name.
* langhooks.c (lhd_set_decl_assembler_name): Use
SET_DECL_ASSEMBLER_NAME.
(lhd_overwrite_decl_assembler_name): Default implementation.
PR c++/82836
PR c++/82737
* cp-objcp-common.h (LANG_HOOKS_OVERWRITE_DECL_ASSEMBLER_NAME):
Override.
* cp-tree.h (overwrite_mangling): Declare.
* decl2.c (struct mangled_decl_hash): Entries are deletable.
(overwrite_mangling): New.
PR c++/82836
PR c++/82737
* g++.dg/pr82836.C: New.
Added:
trunk/gcc/testsuite/g++.dg/pr82836.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-objcp-common.h
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl2.c
trunk/gcc/langhooks-def.h
trunk/gcc/langhooks.c
trunk/gcc/langhooks.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
trunk/gcc/tree.h
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Subject: [Bug c++/82737] [ICE] Compiler segfault on compilation of a certain file (full cause unknown) (file too large for upload, link provided)
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--- Comment #23 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Thu Nov 16 14:54:54 2017
New Revision: 254823
URL: https://gcc.gnu.org/viewcvs?rev=254823&root=gcc&view=rev
Log:
[PATCH] New lang hook
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01340.html
PR c++/82836
PR c++/82737
* tree.h (COPY_DECL_RTL): Rename parms for clarity.
(SET_DECL_ASSEMBLER_NAME): Forward to
overwrite_decl_assembler_name.
(COPY_DECL_ASSEMBLER_NAME): Rename parms for clarity.
(overwrite_decl_assembler_name): Declare.
* tree.c (overwrite_decl_assembler_name): New.
* langhooks-def.h (lhd_overwrite_decl_assembler_name): Declare.
(LANG_HOOKS_OVERWRITE_DECL_ASSEMBLER_NAME): Provide default.
(LANG_HOOKS_INITIALIZER): Add it.
* langhooks.h (struct lang_hooks): Add overwrite_decl_assembler_name.
* langhooks.c (lhd_set_decl_assembler_name): Use
SET_DECL_ASSEMBLER_NAME.
(lhd_overwrite_decl_assembler_name): Default implementation.
PR c++/82836
PR c++/82737
* cp-objcp-common.h (LANG_HOOKS_OVERWRITE_DECL_ASSEMBLER_NAME):
Override.
* cp-tree.h (overwrite_mangling): Declare.
* decl2.c (struct mangled_decl_hash): Entries are deletable.
(overwrite_mangling): New.
PR c++/82836
PR c++/82737
* g++.dg/pr82836.C: New.
Added:
trunk/gcc/testsuite/g++.dg/pr82836.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-objcp-common.h
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl2.c
trunk/gcc/langhooks-def.h
trunk/gcc/langhooks.c
trunk/gcc/langhooks.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
trunk/gcc/tree.h
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Subject: [Bug c++/82737] [ICE] Compiler segfault on compilation of a certain file (full cause unknown) (file too large for upload, link provided)
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #24 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r254823.
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Subject: [Bug c++/82836] [8 Regression] ICE on valid code
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r254823.
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
Date: Thu, 16 Nov 2017 15:01:00 -0000
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #16)
> This also breaks 'make all-gnattools' in a bootstrap build:
>
> g++ -std=gnu++98 -static-libstdc++ -static-libgcc -I- -I../rts -I.
> -I/home/eric/svn/gcc/gcc/ada -static-libstdc++ -static-libgcc -DIN_GCC -g
> -O2 -W -Wall -o ../../gnatmake b_gnatm.o a-except.o ali.o ali-util.o
> aspects.o s-casuti.o alloc.o atree.o binderr.o butil.o casing.o csets.o
> debug.o elists.o einfo.o errout.o erroutc.o errutil.o err_vars.o fmap.o
> fname.o fname-uf.o fname-sf.o gnatmake.o gnatvsn.o hostparm.o interfac.o
> i-c.o i-cstrin.o krunch.o lib.o make.o makeusg.o make_util.o namet.o
> nlists.o opt.o osint.o osint-m.o output.o restrict.o rident.o s-exctab.o
> s-secsta.o s-stalib.o s-stoele.o scans.o scng.o sdefault.o sfn_scan.o
> s-purexc.o s-htable.o scil_ll.o sem_aux.o sinfo.o sinput.o sinput-c.o
> snames.o stand.o stringt.o styleg.o stylesw.o system.o validsw.o switch.o
> switch-m.o table.o targparm.o tempdir.o tree_io.o types.o uintp.o uname.o
> urealp.o usage.o widechar.o ../link.o ../targext.o ../../ggc-none.o
> ../../libcommon-target.a ../../libcommon.a ../../../libcpp/libcpp.a
> ../rts/libgnat.a ../../../libbacktrace/.libs/libbacktrace.a
> ../../../libiberty/libiberty.a -no-pie -ldl
> g++: error: unrecognized command line option ‘-no-pie’
> ../gcc-interface/Makefile:2221: recipe for target '../../gnatmake' failed
> make[2]: *** [../../gnatmake] Error 1
> make[2]: Leaving directory '/home/eric/build/gcc/native/gcc/ada/tools'
> Makefile:188: recipe for target 'gnattools-native' failed
> make[1]: *** [gnattools-native] Error 2
> make[1]: Leaving directory '/home/eric/build/gcc/native/gnattools'
> Makefile:13917: recipe for target 'all-gnattools' failed
> make: *** [all-gnattools] Error 2
>
> During the bootstrap, CXX is set to /home/eric/build/gcc/native/./gcc/xg++
> -B/home/eric/build/gcc/native/./gcc/ so this still works.
Hmm, all-gnattools does
all-gnattools: configure-gnattools
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; \
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
$(HOST_EXPORTS) \
(cd $(HOST_SUBDIR)/gnattools && \
$(MAKE) $(BASE_FLAGS_TO_PASS) $(EXTRA_HOST_FLAGS)
$(STAGE1_FLAGS_TO_PASS) \
$(TARGET-gnattools))
so it builds for the host. But when bootstrapping we want to build it
similar to if it were a target library, that is, with the just built GCC.
So,
host_modules= { module= gnattools; };
is technically not correct. Not sure how it works during bootstrap, I'd have
expected that the host compiler is used as well (gnattools is not
bootstrapped).
>From gcc-bugs-return-581909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 15:03:23 2017
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Subject: [Bug middle-end/83019] [8 Regression] Compiler dumps predictions with -nan%
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|Compiler dumps predictions |[8 Regression] Compiler
|with -nan% |dumps predictions with
| |-nan%
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Subject: [Bug c++/83018] To support creation of header-only C++ libraries with SIMD optimization and dynamic dispatch, allow all x86 intrinsics regardless of target instruction set
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
You need to guard affected code portions with #pragma GCC target ("avx2") for
example.
>From gcc-bugs-return-581911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 15:26:40 2017
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Subject: [Bug rtl-optimization/80818] LRA clobbers live hard reg clobbered during rematerialization
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
--- Comment #8 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Hi Vladimir. What do you think about the additional patch?
>From gcc-bugs-return-581912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 15:31:50 2017
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Subject: [Bug ada/81878] --disable-bootstrap --enable-languagesa fails
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--- Comment #18 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> all-gnattools: configure-gnattools
> @: $(MAKE); $(unstage)
> @r=`${PWD_COMMAND}`; export r; \
> s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
> $(HOST_EXPORTS) \
> (cd $(HOST_SUBDIR)/gnattools && \
> $(MAKE) $(BASE_FLAGS_TO_PASS) $(EXTRA_HOST_FLAGS)
> $(STAGE1_FLAGS_TO_PASS) \
> $(TARGET-gnattools))
>
> so it builds for the host. But when bootstrapping we want to build it
> similar to if it were a target library, that is, with the just built GCC.
Yes, that's what happens, i.e. the CXX passed to gnattools is CXX_FOR_TARGET.
> So,
>
> host_modules= { module= gnattools; };
>
> is technically not correct. Not sure how it works during bootstrap, I'd have
> expected that the host compiler is used as well (gnattools is not bootstrapped).
This would simply break, because the gnattools really need to be bootstrapped
as they generally cannot be built by the host compiler. Quite puzzling indeed.
>From gcc-bugs-return-581913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 15:46:28 2017
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From: "oremanj at mit dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83020] New: ('17) Class template constructor call skipped with no error when substitution fails in default argument
Date: Thu, 16 Nov 2017 15:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83020
Bug ID: 83020
Summary: ('17) Class template constructor call skipped with no
error when substitution fails in default argument
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: oremanj at mit dot edu
Target Milestone: ---
The below C++ program is ill-formed, but gcc 7.1 and 7.2 accept it in C++17
mode, and emit code that simply doesn't call the constructor of Whoops at all.
This is reproducible if the constructor is defined out-of-line as well; there's
no reference to Whoops in the generated assembly. In C++14 mode or with gcc
6.3, the error is correctly diagnosed.
$ cat t.cc
struct NoDefault {
int val = 1234;
NoDefault(int v) : val(v) {}
};
template <class T>
struct Whoops {
const char *str;
T obj;
Whoops(const char *s, T v = T()) : str(s), obj(v) {}
};
const char *test() {
return Whoops<NoDefault>("hi").str;
}
$ g++-7 -O3 -std=c++17 -Wall -c t.cc && objdump -d t.o
t.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <_Z4testv>:
0: 31 c0 xor %eax,%eax
2: c3 retq
$ g++-7 -O0 -std=c++17 -Wall -c t.cc && objdump -d t.o
t.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <_Z4testv>:
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: 5d pop %rbp
5: c3 retq
$ g++-7 -v
Using built-in specs.
COLLECT_GCC=g++-7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian
7.2.0-12+hrtdeb8u1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=gcc4-compatible --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i586 --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 --disable-initfini-array
Thread model: posix
gcc version 7.2.1 20171025 (Debian 7.2.0-12)
>From gcc-bugs-return-581914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:09:13 2017
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Subject: [Bug fortran/69455] [6/7/8 Regression] [F08] Assembler error(s) when using intrinsic modules in two BLOCK
Date: Thu, 16 Nov 2017 16:09:00 -0000
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Ev Drikos <drikosev at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |drikosev at gmail dot com
--- Comment #12 from Ev Drikos <drikosev at gmail dot com> ---
Is there any chance to see this patch?
Thanks,
Ev. Drikos
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Subject: [Bug tree-optimization/82583] missing -Warray-bounds on out-of-bounds inner indices
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82583
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Nov 16 16:12:36 2017
New Revision: 254830
URL: https://gcc.gnu.org/viewcvs?rev=254830&root=gcc&view=rev
Log:
PR tree-optimization/82588 - missing -Warray-bounds on a excessively large
index
PR tree-optimization/82583 - missing -Warray-bounds on out-of-bounds inner
indic
gcc/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* tree-vrp.c (check_array_ref): Handle flexible array members,
string literals, and inner indices.
(search_for_addr_array): Add detail to diagnostics.
gcc/testsuite/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* c-c++-common/Warray-bounds.c: New test.
* gcc.dg/Warray-bounds-11.c: Adjust.
* gcc.dg/Warray-bounds-22.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Warray-bounds.c
trunk/gcc/testsuite/gcc.dg/Warray-bounds-22.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/Warray-bounds-11.c
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/82588] missing -Warray-bounds on a excessively large index
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82588
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Nov 16 16:12:36 2017
New Revision: 254830
URL: https://gcc.gnu.org/viewcvs?rev=254830&root=gcc&view=rev
Log:
PR tree-optimization/82588 - missing -Warray-bounds on a excessively large
index
PR tree-optimization/82583 - missing -Warray-bounds on out-of-bounds inner
indic
gcc/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* tree-vrp.c (check_array_ref): Handle flexible array members,
string literals, and inner indices.
(search_for_addr_array): Add detail to diagnostics.
gcc/testsuite/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* c-c++-common/Warray-bounds.c: New test.
* gcc.dg/Warray-bounds-11.c: Adjust.
* gcc.dg/Warray-bounds-22.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Warray-bounds.c
trunk/gcc/testsuite/gcc.dg/Warray-bounds-22.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/Warray-bounds-11.c
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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Bug 56456 depends on bug 82583, which changed state.
Bug 82583 Summary: missing -Warray-bounds on out-of-bounds inner indices
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82583
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/82583] missing -Warray-bounds on out-of-bounds inner indices
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r254830. GCC now issues the warnings below for the test case in
comment #0:
a.c: In function ‘f’:
a.c:6:12: warning: array subscript 4 is above array bounds of ‘int[4]’
[-Warray-bounds]
p->a[1].a[4] = 1;
~~~~~~~~~^~~
a.c: In function ‘g’:
a.c:11:7: warning: array subscript 2 is above array bounds of ‘struct A[2]’
[-Warray-bounds]
p->a[2].a[3] = 1;
~~~~^~~
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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Bug 56456 depends on bug 82588, which changed state.
Bug 82588 Summary: missing -Warray-bounds on a excessively large index
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82588
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82588] missing -Warray-bounds on a excessively large index
Date: Thu, 16 Nov 2017 16:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82588
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82455
Resolution|--- |FIXED
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
The -Warrray-bounds part of the issue has been fixed in r254830. GCC now
issues the warnings below for the test case in comment #0:
a.c: In function ‘f1’:
a.c:17:11: warning: array subscript 4611686018427387904 is above array bounds
of ‘int[]’ [-Warray-bounds]
return a[__SIZE_MAX__ / sizeof (int) + 1]; // missing -Warray-bounds
~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.c: In function ‘f2’:
a.c:22:14: warning: array subscript 9223372036854775807 is above array bounds
of ‘char[]’ [-Warray-bounds]
return a->a[__SIZE_MAX__ / 2]; // missing -Warray-bounds
~~~~^~~~~~~~~~~~~~~~~~
The out-of-bounds offset is still not diagnosed. It's the subject of a
separate bug (pr82455).
>From gcc-bugs-return-581921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:27:36 2017
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Subject: [Bug c/68325] missing -Warray-bounds on a negative subscript into a flexible array member
Date: Thu, 16 Nov 2017 16:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68325
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
Target Milestone|--- |8.0
Known to fail| |5.4.0, 6.4.0, 7.2.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r254830. GCC now issues the warnings below for the test case in
comment #0:
z.c: In function ‘foo’:
z.c:7:16: warning: array subscript -2147483647 is below array bounds of
‘int[99]’ [-Warray-bounds]
return s.a [-__INT_MAX__];
~~~~^~~~~~~~~~~~~~
z.c: In function ‘bar’:
z.c:12:17: warning: array subscript -2147483647 is below array bounds of
‘int[99]’ [-Warray-bounds]
return p->a [-__INT_MAX__];
~~~~~^~~~~~~~~~~~~~
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Subject: [Bug tree-optimization/82588] missing -Warray-bounds on a excessively large index
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Target Milestone|--- |8.0
Known to fail| |5.4.0, 6.4.0, 7.2.0
>From gcc-bugs-return-581923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:35:22 2017
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Subject: [Bug debug/83010] [AARCH64] DW_AT_location is not emitted for thread local variable
Date: Thu, 16 Nov 2017 16:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jgreenhalgh at gcc dot gnu.org,
| |ktkachov at gcc dot gnu.org,
| |rearnsha at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is because the aarch64 backend doesn't define
TARGET_ASM_OUTPUT_DWARF_DTPREL hook.
Either the assembler lacks the corresponding support, or just the backend
doesn't define it even if it could.
>From gcc-bugs-return-581925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:35:39 2017
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
Date: Thu, 16 Nov 2017 16:35:00 -0000
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Bug 56456 depends on bug 59124, which changed state.
Bug 59124 Summary: [6 Regression] Wrong warnings "array subscript is above array bounds"
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-581924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:35:39 2017
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Subject: [Bug tree-optimization/59124] [6 Regression] Wrong warnings "array subscript is above array bounds"
Date: Thu, 16 Nov 2017 16:35:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |FIXED
Known to fail| |8.0
--- Comment #47 from Martin Sebor <msebor at gcc dot gnu.org> ---
None of the test cases here except for the one in comment #41 triggers
-Warray-bounds with GCC 8.0. According to comments #42 and #43 the warning for
the test case in comment #41 is a true positive. I'll go ahead and resolve
this as fixed.
I suggest to open a separate bug for any new/outstanding issues in this area to
make it easier to track each separately.
>From gcc-bugs-return-581926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:42:07 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 16:42:00 -0000
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 42621 [details]
> updated patch
AFAICT the patch does not fix the problem:
without the patch
PI 2.98876095
PI 3.14159274
4.742u 0.015s 0:04.77 99.5% 0+0k 0+0io 36pf+0w
with the patch
PI 2.98876095
PI 3.14159274
4.782u 0.012s 0:04.80 99.7% 0+0k 0+0io 0pf+0w
>From gcc-bugs-return-581927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:49:12 2017
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Subject: [Bug middle-end/63477] [6/7/8 Regression] Bogus warning with -O3 -Warray-bounds: array subscript is above array bounds
Date: Thu, 16 Nov 2017 16:49:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Nov 16 16:48:36 2017
New Revision: 254833
URL: https://gcc.gnu.org/viewcvs?rev=254833&root=gcc&view=rev
Log:
PR middle-end/63477 - Bogus warning with -O3 -Warray-bounds: array subscript
is above array bounds
gcc/testsuite/ChangeLog:
PR middle-end/63477
* gcc.dg/pr63477.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr63477.c
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
Bug 56456 depends on bug 63477, which changed state.
Bug 63477 Summary: [6/7/8 Regression] Bogus warning with -O3 -Warray-bounds: array subscript is above array bounds
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63477
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-581928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 16:50:05 2017
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Subject: [Bug middle-end/63477] [6/7/8 Regression] Bogus warning with -O3 -Warray-bounds: array subscript is above array bounds
Date: Thu, 16 Nov 2017 16:50:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
Known to fail|8.0 |
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Strangely, I cannot reproduce this warning anymore with GCC 8. Bisection
points to r220157 (gcc 5.0.0) as the revision that fixed it. I've added the
test case to the test suite in r254833 and with that I'm resolving this bug as
fixed. Please reopen it if the problem reappears.
>From gcc-bugs-return-581930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:30:45 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 17:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 16, 2017 5:42:02 PM GMT+01:00, "dominiq at lps dot ens.fr"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
>
>--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr>
>---
>> Created attachment 42621 [details]
>> updated patch
>
>AFAICT the patch does not fix the problem:
>
>without the patch
>
> PI 2.98876095
> PI 3.14159274
>4.742u 0.015s 0:04.77 99.5% 0+0k 0+0io 36pf+0w
>
>with the patch
>
> PI 2.98876095
> PI 3.14159274
>4.782u 0.012s 0:04.80 99.7% 0+0k 0+0io 0pf+0w
Please use - fopt-info-loop to verify the loop is parallelized. You have to use
- floop-parallelize-all as well due to the cost model issue.
It might be we employ the same cost model at runtime.
>From gcc-bugs-return-581931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:31:57 2017
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Subject: [Bug debug/83010] [AARCH64] DW_AT_location is not emitted for thread local variable
Date: Thu, 16 Nov 2017 17:31:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
>From quick look, it seems gas/ld just doesn't have corresponding support, so
that would need to be written first. There is R_AARCH64_TLS_DTPREL64
relocation, wonder if that might do the job if gas has some way to emit that
relocation.
>From gcc-bugs-return-581933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:33:20 2017
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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Bug 56456 depends on bug 63441, which changed state.
Bug 63441 Summary: incorrect "array subscript is below/above array bounds" diagnostic
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63441
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |WORKSFORME
>From gcc-bugs-return-581932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:33:20 2017
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Subject: [Bug middle-end/63441] incorrect "array subscript is below/above array bounds" diagnostic
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |5.4.0, 6.4.0, 7.1.0, 8.0
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=63477
Resolution|--- |WORKSFORME
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Just like with pr63477, I cannot reproduce the warning with this test case in
GCC 8.0 anymore (despite what I said in comment #2), or 7-branch, or 6-branch,
or even 5-branch. Just like in pr63477, bisection also points to r220157 (gcc
5.0.0) as the fix. So I'll assume that what I saw in comment #2 was some
transient fluke and resolve this as worksforsome (based on comment #1 and #2
saying it would make sense to diagnose this).
>From gcc-bugs-return-581934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:39:59 2017
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Subject: [Bug fortran/83012] [8 Regression] Simply contiguous pointer function not recognized as contiguous
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
>From gcc-bugs-return-581935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:41:54 2017
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Subject: [Bug tree-optimization/82977] [8 Regression] AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The regression is fixed, the other issues still need work.
>From gcc-bugs-return-581936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 17:44:46 2017
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Subject: [Bug fortran/82976] [8 Regression] Error: non-trivial conversion at assignment since r254526
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Subject: [Bug fortran/82904] [7/8 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:261
Date: Thu, 16 Nov 2017 17:45:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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>From gcc-bugs-return-581938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:00:46 2017
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Subject: [Bug c++/82799] [8 Regression] -Wunused-but-set-variable false positive
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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| |jason at gcc dot gnu.org
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r253266.
>From gcc-bugs-return-581939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:01:32 2017
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Subject: [Bug debug/83010] [AARCH64] DW_AT_location is not emitted for thread local variable
Date: Thu, 16 Nov 2017 18:01:00 -0000
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--- Comment #3 from Yao Qi <qiyao at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> From quick look, it seems gas/ld just doesn't have corresponding support, so
> that would need to be written first. There is R_AARCH64_TLS_DTPREL64
> relocation, wonder if that might do the job if gas has some way to emit that
> relocation.
Yes, beside gcc, something is needed in ld too. Clang emits DW_AT_location for
TLS variable, but ld failed to link,
$ ./clang+llvm-5.0.0-aarch64-linux-gnu/bin/clang -g 4.c -o 4.exe
/usr/bin/ld: /tmp/4-767da1.o(.debug_info+0x37): R_AARCH64_ABS64 used with TLS
symbol a_thread_local
but gold is ok,
$ ./clang+llvm-5.0.0-aarch64-linux-gnu/bin/clang -fuse-ld=gold -g 4.c -o 4.exe
<1><2a>: Abbrev Number: 2 (DW_TAG_variable)
<2b> DW_AT_name : (indirect string, offset: 0x3e): a_thread_local
<2f> DW_AT_type : <0x40>
<33> DW_AT_external : 1
<33> DW_AT_decl_file : 1
<34> DW_AT_decl_line : 2
<35> DW_AT_location : 10 byte block: e 0 0 0 0 0 0 0 0 e0
(DW_OP_const8u: 0 0; DW_OP_GNU_push_tls_address or DW_OP_HP_unknown)
>From gcc-bugs-return-581940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:12:50 2017
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Subject: [Bug c++/82781] [6/7/8 Regression] Vector extension operators return wrong result in constexpr
Date: Thu, 16 Nov 2017 18:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll have a look.
>From gcc-bugs-return-581941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:24:43 2017
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83021] New: [7 Regression] gfortran segfault
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Bug ID: 83021
Summary: [7 Regression] gfortran segfault
Product: gcc
Version: 8.0
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Created attachment 42622
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test case
[forwarded from https://bugs.debian.org/881918]
seen building open-coarrays with the gcc-7-branch 20171115, not seen on the
branch 20171001
$ gfortran global_field.f90 -fcoarray=lib
global_field.f90:126:0:
lhs%values(:) = rhs%state()
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
Program received signal SIGSEGV, Segmentation fault.
0x000000000067a16f in gfc_walk_array_ref(gfc_ss*, gfc_expr*, gfc_ref*) ()
(gdb) bt
#0 0x000000000067a16f in gfc_walk_array_ref(gfc_ss*, gfc_expr*, gfc_ref*) ()
#1 0x000000000067cf7a in gfc_conv_expr_descriptor(gfc_se*, gfc_expr*) ()
#2 0x00000000006a6572 in ?? ()
#3 0x00000000006b9814 in gfc_conv_intrinsic_function(gfc_se*, gfc_expr*) ()
#4 0x00000000006a0895 in ?? ()
#5 0x0000000000696a3b in gfc_apply_interface_mapping(gfc_interface_mapping*,
gfc_se*, gfc_expr*) ()
#6 0x000000000066ee45 in
gfc_set_loop_bounds_from_array_spec(gfc_interface_mapping*, gfc_se*,
gfc_array_spec*) ()
#7 0x000000000069f37e in gfc_conv_procedure_call(gfc_se*, gfc_symbol*,
gfc_actual_arglist*, gfc_expr*, vec<tree_node*, va_gc, vl_embed>*) ()
#8 0x00000000006a087d in ?? ()
#9 0x000000000067c239 in ?? ()
#10 0x000000000067cdf6 in gfc_conv_loop_setup(gfc_loopinfo*, locus*) ()
#11 0x00000000006a32e0 in ?? ()
#12 0x0000000000668b10 in ?? ()
#13 0x000000000068de98 in gfc_generate_function_code(gfc_namespace*) ()
#14 0x000000000066c86a in gfc_generate_module_code(gfc_namespace*) ()
#15 0x000000000062229c in gfc_parse_file() ()
#16 0x0000000000665630 in ?? ()
#17 0x0000000000a7ac6f in ?? ()
#18 0x000000000059923a in toplev::main(int, char**) ()
#19 0x000000000059b5eb in main ()
>From gcc-bugs-return-581942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:25:28 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug web/78315] "Changes" don't explain what "LRA" is
Date: Thu, 16 Nov 2017 18:25:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
The "Changes" page for gcc-7 at least says now that LRA is "(a new local
register allocator)"; is that enough?
>From gcc-bugs-return-581943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:40:50 2017
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Subject: [Bug middle-end/83022] New: malloc & memset -> calloc is not always an optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83022
Bug ID: 83022
Summary: malloc & memset -> calloc is not always an
optimization
Product: gcc
Version: 8.0
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exemplar
We like to optimize malloc followed by memset into a calloc call. Even when
the memset is conditional. That's well formed, but pessimizes, and noticeable
when the size is large and we do unnecessary clearing.
The attached example, compiled on x86_64 with -O results in:
_Z1mmb:
movl $1, %esi
jmp calloc
But, it causes a noticeable performance regression, as 'c' is false
sufficiently often and 's' is large sufficiently often.
>From gcc-bugs-return-581944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:54:37 2017
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Subject: [Bug c++/82781] [6/7/8 Regression] Vector extension operators return wrong result in constexpr
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42624
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gcc8-pr82781.patch
Untested fix.
>From gcc-bugs-return-581945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 18:56:05 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Thu, 16 Nov 2017 18:56:00 -0000
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Please use -fopt-info-loop to verify the loop is parallelized. You have
> to use -floop-parallelize-all as well due to the cost model issue.
If I use the commented loop I get with/without the patch
% gfc -Ofast -ftree-parallelize-loops=4 -fopt-info-loop pr83017_db.f90
pr83017_db.f90:28:0: note: loop with 5 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:26:0: note: loop with 5 iterations completely unrolled (header
execution count 1515)
pr83017_db.f90:38:0: note: loop with 5 iterations completely unrolled (header
execution count 1515)
pr83017_db.f90:18:0: note: loop with 4 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:15:0: note: loop with 5 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:47:0: note: parallelizing inner loop 6
pr83017_db.f90:24:0: note: basic block vectorized
pr83017_db.f90:47:0: note: basic block vectorized
% time ./a.out
PI 2.98875999
PI 3.14159274
4.027u 0.015s 0:01.02 395.0% 0+0k 0+0io 7pf+0w
i.e., a loop is parallelized, and with -floop-parallelize-all
% gfc -Ofast -ftree-parallelize-loops=4 -floop-parallelize-all -fopt-info-loop
pr83017_db.f90
pr83017_db.f90:28:0: note: loop with 5 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:26:0: note: loop with 5 iterations completely unrolled (header
execution count 1515)
pr83017_db.f90:38:0: note: loop with 5 iterations completely unrolled (header
execution count 1515)
pr83017_db.f90:18:0: note: loop with 4 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:15:0: note: loop with 5 iterations completely unrolled (header
execution count 379)
pr83017_db.f90:26:0: note: parallelizing outer loop 3
pr83017_db.f90:24:0: note: basic block vectorized
% time ./a.out
PI 2.98876095
PI 3.14159274
4.152u 0.011s 0:04.16 100.0% 0+0k 0+0io 0pf+0w
i.e., the report says the loop is parallelized, but this is not reflected at
run time (for the original test as well).
>From gcc-bugs-return-581946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 19:03:03 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
Date: Thu, 16 Nov 2017 19:03:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-16
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Could you please provide the file(s) needed to generate local_field_module.mod?
Revision r254377 for the 7 branch is OK.
>From gcc-bugs-return-581947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 19:12:01 2017
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Subject: [Bug middle-end/83023] New: branch probabilities pessimize malloc
Date: Thu, 16 Nov 2017 19:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83023
Bug ID: 83023
Summary: branch probabilities pessimize malloc
Product: gcc
Version: 8.0
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Created attachment 42625
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42625&action=edit
exemplar
on x86_64 compiled with -O2 -fdump-tree-all, the ma.cc.046t.profile_estimate
contains:
r_5 = malloc (s_3(D));
if (r_5 != 0B)
goto <bb 3>; [53.47%]
else
goto <bb 4>; [46.53%]
That's a pretty inaccurate guess at the behaviour of malloc!
>From gcc-bugs-return-581948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 19:32:16 2017
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Subject: [Bug target/62011] False Data Dependency in popcnt instruction
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Andrew Senkevich <andrew.n.senkevich at gmail dot com> changed:
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CC| |andrew.n.senkevich at gmail dot co
| |m
--- Comment #17 from Andrew Senkevich <andrew.n.senkevich at gmail dot com> ---
(In reply to Travis Downs from comment #16)
> Also, this is fixed for Skylake for tzcnt and lzcnt but not popcnt.
How to confirm it? As I see it is fixed for popcnt. Could you show some
reproducer?
>From gcc-bugs-return-581949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:13:23 2017
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Subject: =?UTF-8?B?W0J1ZyBkcml2ZXIvODMwMTZdIGduYXQxOiB3YXJuaW5nOiBjb21tYW5kIGxp?= =?UTF-8?B?bmUgb3B0aW9uIOKAmC1ub3N0ZGluYysr4oCZIGlzIHZhbGlkIGZvciBDKysv?= =?UTF-8?B?T2JqQysrIGJ1dCBub3QgZm9yIEFkYQ==?Date: Thu, 16 Nov 2017 20:13:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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>From gcc-bugs-return-581950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:14:28 2017
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Subject: [Bug c++/79092] template<auto>: type ignored if value already instantiated
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Nov 16 20:13:48 2017
New Revision: 254843
URL: https://gcc.gnu.org/viewcvs?rev=254843&root=gcc&view=rev
Log:
PR c++/79092 - non-type args of different types are different
* tree.c (cp_tree_equal): Check the type of constants.
* pt.c (unify) [TEMPLATE_PARM_INDEX]: Handle UNIFY_ALLOW_INTEGER
when comparing to previously deduced argument.
(maybe_convert_nontype_argument): New.
(convert_nontype_argument): Call it.
(tsubst_copy_and_build): Handle partial instantiation of
IMPLICIT_CONV_EXPR.
(unify): Ignore type when deducing from array bound.
(dependent_type_p_r): Handle DEFERRED_NOEXCEPT.
(value_dependent_expression_p): Any type-dependent expression is
value-dependent. Handle IMPLICIT_CONV_EXPR.
* cp-tree.h (IMPLICIT_CONV_EXPR_NONTYPE_ARG): New.
* mangle.c (write_template_arg): Strip IMPLICIT_CONV_EXPR.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/nontype-auto12.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/mangle.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/tree.c
>From gcc-bugs-return-581951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:16:36 2017
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Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #5)
> This means you can very well replace memcpy with strcpy if you know
> there's a '\0' in and only in the right place.
Sure, except when dealing with a string literal we know that the source is a
string literal and not a pointer representation disguised as a sequence of
bytes. The optimization I'm referring to is specifically for string literals:
unsigned g (struct A *a)
{
strcpy (a->d, "123"); // here we have a literal, not the representation
of a pointer
return strlen (a->d); // a->d must be a valid pointer
}
> We certainly have to treat literal pointers encoded in any form
> conservatively. I don't see how they are against any standard. There's
> other clearly "valid" optimizations missing in GCC that look more
> important to implement.
The C and C++ standards are clear as to what are valid pointer values and how
they can come about. Copying the representation from an arbitrary constant of
an incompatible type into a pointer object is certainly not one of them. I.e.,
this:
const char a[] = "123";
char *p;
memcpy (&p, a, sizeof p);
strlen (p);
is undefined, but this is of course valid:
const char a[4] = "123";
char *p;
char *q = a;
memcpy (&p, &q, sizeof p);
strlen (p);
because it just copies the representation of what's known to be a valid pointer
value into another pointer object of a compatible type.
The point is that the bytes of no string literal can also be a valid pointer
value, even if it happens to have the same representation as one, and this can
be exploited to allow the optimization above. It will not invalidate any
correct programs. It would be not only invalid but downright silly for a
program to represent valid addresses as string literals. Embedded programs of
course do hardcode pointer values, but not in string literals: they hardcode
them as integers, e.g.,
void *my_register = (void*)0x123;
but never like so:
char my_register[] = "123";
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82856
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov 16 20:24:00 2017
New Revision: 254845
URL: https://gcc.gnu.org/viewcvs?rev=254845&root=gcc&view=rev
Log:
2017-11-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PR bootstrap/82856
* doc/install.texi: Document incompatibility of Perl >=5.6.26
with the required version of automake 1.11.6.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/install.texi
>From gcc-bugs-return-581953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:30:33 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79845] rs6000: make code in rs6000.c more i18n-friendly
Date: Thu, 16 Nov 2017 20:30:00 -0000
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 16 20:29:52 2017
New Revision: 254846
URL: https://gcc.gnu.org/viewcvs?rev=254846&root=gcc&view=rev
Log:
[gcc]
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_expand_builtin): Do not do the
switch statement mapping KF built-ins to TF built-ins if we don't
have the proper ISA 3.0 assembler support.
Back port from trunk
2017-11-14 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000-c.c (is_float128_p): New helper function.
(rs6000_builtin_type_compatible): Treat _Float128 and long double
as being compatible if -mabi=ieeelongdouble.
* config/rs6000/rs6000-builtin.def (BU_FLOAT128_HW_1): New macros
to setup float128 built-ins with hardware support.
(BU_FLOAT128_HW_2): Likewise.
(BU_FLOAT128_HW_3): Likewise.
(BU_FLOAT128_HW_VSX_1): Likewise.
(BU_FLOAT128_HW_VSX_2): Likewise.
(scalar_extract_expq): Change float128 built-in functions to
accommodate having both KFmode and TFmode functions. Use the
KFmode variant as the default.
(scalar_extract_sigq): Likewise.
(scalar_test_neg_qp): Likewise.
(scalar_insert_exp_q): Likewise.
(scalar_insert_exp_qp): Likewise.
(scalar_test_data_class_qp): Likewise.
(sqrtf128_round_to_odd): Delete processing the round to odd
built-in functions as special built-in functions, and define them
as float128 built-ins. Use the KFmode variant as the default.
(truncf128_round_to_odd): Likewise.
(addf128_round_to_odd): Likewise.
(subf128_round_to_odd): Likewise.
(mulf128_round_to_odd): Likewise.
(divf128_round_to_odd): Likewise.
(fmaf128_round_to_odd): Likewise.
* config/rs6000/rs6000.c (rs6000_expand_binop_builtin): Add
support for KFmode and TFmode xststdcqp calls.
(rs6000_expand_builtin): If long double is IEEE 128-bit floating
point, switch the built-in handlers for the get/set float128
exponent, get float128 mantissa, float128 test built-ins, and the
float128 round to odd built-in functions. Eliminate creating the
float128 round to odd built-in functions as special built-ins.
(rs6000_init_builtins): Eliminate special creation of the float128
round to odd built-in functions.
* config/rs6000/vsx.md (xsxexpqp_<mode>): Change float128 built-in
function insns to support both TFmode and KFmode variants.
(xsxsigqp_<mode>): Likewise.
(xsiexpqpf_<mode>): Likewise.
(xsiexpqp_<mode>): Likewise.
(xststdcqp_<mode>): Likewise.
(xststdcnegqp_<mode>): Likewise.
(xststdcqp_<mode>): Likewise.
Back port from trunk
2017-11-06 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/82748
* config/rs6000/rs6000-builtin.def (BU_FLOAT128_1): Delete
float128 helper macros, which are no longer used after deleting
the old 'q' built-in functions, and moving the round to odd
built-in functions to being special built-in functions.
(BU_FLOAT128_2): Likewise.
(BU_FLOAT128_1_HW): Likewise.
(BU_FLOAT128_2_HW): Likewise.
(BU_FLOAT128_3_HW): Likewise.
(FABSQ): Delete old 'q' built-in functions.
(COPYSIGNQ): Likewise.
(SQRTF128_ODD): Move round to odd built-in functions to be
special built-in functions, so that we can handle
-mabi=ieeelongdouble.
(TRUNCF128_ODD): Likewise.
(ADDF128_ODD): Likewise.
(SUBF128_ODD): Likewise.
(MULF128_ODD): Likewise.
(DIVF128_ODD): Likewise.
(FMAF128_ODD): Likewise.
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Map old 'q'
built-in names to 'f128'.
* config/rs6000/rs6000.c (rs6000_fold_builtin): Remove folding the
old 'q' built-in functions, as the machine independent code for
'f128' built-in functions handles this.
(rs6000_expand_builtin): Add expansion for float128 round to odd
functions, keying off on -mabi=ieeelongdouble of whether to use
the KFmode or TFmode variant.
(rs6000_init_builtins): Initialize the _Float128 round to odd
built-in functions.
* doc/extend.texi (PowerPC Built-in Functions): Document the old
_Float128 'q' built-in functions are now mapped into the new
'f128' built-in functions.
[gcc/testsuite]
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
* gcc.target/powerpc/bfp/bfp.exp: Look for *.c files, not *.c*
files to prevent ~ files from getting recognized.
* gcc.target/powerpc/dfp/dfp.exp: Likewise.
* gcc.target/powerpc/vsu/vsu.exp: Likewise.
Back port from trunk
2017-11-14 Michael Meissner <meissner@linux.vnet.ibm.com>
* gcc.target/powerpc/float128-hw4.c: New test.
Back port from trunk
2017-08-14 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/79845
* gcc.target/powerpc/bfp/scalar-extract-exp-4.c: Adjust diagnostic
strings.
* gcc.target/powerpc/bfp/scalar-extract-sig-4.c: Likewise.
* gcc.target/powerpc/bfp/scalar-insert-exp-10.c: Likewise.
* gcc.target/powerpc/bfp/scalar-insert-exp-7.c: Likewise.
* gcc.target/powerpc/bfp/scalar-test-data-class-11.c: Likewise.
* gcc.target/powerpc/bfp/scalar-test-neg-5.c: Likewise.
Added:
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/float128-hw4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr82748-1.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr82748-2.c
Modified:
branches/ibm/gcc-7-branch/gcc/ChangeLog.ibm
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000-builtin.def
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000-c.c
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/ibm/gcc-7-branch/gcc/config/rs6000/vsx.md
branches/ibm/gcc-7-branch/gcc/doc/extend.texi
branches/ibm/gcc-7-branch/gcc/testsuite/ChangeLog.ibm
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/bfp.exp
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-extract-exp-4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-extract-sig-4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-insert-exp-10.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-insert-exp-7.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-test-data-class-11.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-test-neg-5.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/dfp/dfp.exp
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsu/vsu.exp
>From gcc-bugs-return-581954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:30:35 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82748] ICE with __builtin_fabsq and __float128 in copy_to_mode_reg, at explow.c:612
Date: Thu, 16 Nov 2017 20:30:00 -0000
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 16 20:29:52 2017
New Revision: 254846
URL: https://gcc.gnu.org/viewcvs?rev=254846&root=gcc&view=rev
Log:
[gcc]
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_expand_builtin): Do not do the
switch statement mapping KF built-ins to TF built-ins if we don't
have the proper ISA 3.0 assembler support.
Back port from trunk
2017-11-14 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000-c.c (is_float128_p): New helper function.
(rs6000_builtin_type_compatible): Treat _Float128 and long double
as being compatible if -mabi=ieeelongdouble.
* config/rs6000/rs6000-builtin.def (BU_FLOAT128_HW_1): New macros
to setup float128 built-ins with hardware support.
(BU_FLOAT128_HW_2): Likewise.
(BU_FLOAT128_HW_3): Likewise.
(BU_FLOAT128_HW_VSX_1): Likewise.
(BU_FLOAT128_HW_VSX_2): Likewise.
(scalar_extract_expq): Change float128 built-in functions to
accommodate having both KFmode and TFmode functions. Use the
KFmode variant as the default.
(scalar_extract_sigq): Likewise.
(scalar_test_neg_qp): Likewise.
(scalar_insert_exp_q): Likewise.
(scalar_insert_exp_qp): Likewise.
(scalar_test_data_class_qp): Likewise.
(sqrtf128_round_to_odd): Delete processing the round to odd
built-in functions as special built-in functions, and define them
as float128 built-ins. Use the KFmode variant as the default.
(truncf128_round_to_odd): Likewise.
(addf128_round_to_odd): Likewise.
(subf128_round_to_odd): Likewise.
(mulf128_round_to_odd): Likewise.
(divf128_round_to_odd): Likewise.
(fmaf128_round_to_odd): Likewise.
* config/rs6000/rs6000.c (rs6000_expand_binop_builtin): Add
support for KFmode and TFmode xststdcqp calls.
(rs6000_expand_builtin): If long double is IEEE 128-bit floating
point, switch the built-in handlers for the get/set float128
exponent, get float128 mantissa, float128 test built-ins, and the
float128 round to odd built-in functions. Eliminate creating the
float128 round to odd built-in functions as special built-ins.
(rs6000_init_builtins): Eliminate special creation of the float128
round to odd built-in functions.
* config/rs6000/vsx.md (xsxexpqp_<mode>): Change float128 built-in
function insns to support both TFmode and KFmode variants.
(xsxsigqp_<mode>): Likewise.
(xsiexpqpf_<mode>): Likewise.
(xsiexpqp_<mode>): Likewise.
(xststdcqp_<mode>): Likewise.
(xststdcnegqp_<mode>): Likewise.
(xststdcqp_<mode>): Likewise.
Back port from trunk
2017-11-06 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/82748
* config/rs6000/rs6000-builtin.def (BU_FLOAT128_1): Delete
float128 helper macros, which are no longer used after deleting
the old 'q' built-in functions, and moving the round to odd
built-in functions to being special built-in functions.
(BU_FLOAT128_2): Likewise.
(BU_FLOAT128_1_HW): Likewise.
(BU_FLOAT128_2_HW): Likewise.
(BU_FLOAT128_3_HW): Likewise.
(FABSQ): Delete old 'q' built-in functions.
(COPYSIGNQ): Likewise.
(SQRTF128_ODD): Move round to odd built-in functions to be
special built-in functions, so that we can handle
-mabi=ieeelongdouble.
(TRUNCF128_ODD): Likewise.
(ADDF128_ODD): Likewise.
(SUBF128_ODD): Likewise.
(MULF128_ODD): Likewise.
(DIVF128_ODD): Likewise.
(FMAF128_ODD): Likewise.
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Map old 'q'
built-in names to 'f128'.
* config/rs6000/rs6000.c (rs6000_fold_builtin): Remove folding the
old 'q' built-in functions, as the machine independent code for
'f128' built-in functions handles this.
(rs6000_expand_builtin): Add expansion for float128 round to odd
functions, keying off on -mabi=ieeelongdouble of whether to use
the KFmode or TFmode variant.
(rs6000_init_builtins): Initialize the _Float128 round to odd
built-in functions.
* doc/extend.texi (PowerPC Built-in Functions): Document the old
_Float128 'q' built-in functions are now mapped into the new
'f128' built-in functions.
[gcc/testsuite]
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-16 Michael Meissner <meissner@linux.vnet.ibm.com>
* gcc.target/powerpc/bfp/bfp.exp: Look for *.c files, not *.c*
files to prevent ~ files from getting recognized.
* gcc.target/powerpc/dfp/dfp.exp: Likewise.
* gcc.target/powerpc/vsu/vsu.exp: Likewise.
Back port from trunk
2017-11-14 Michael Meissner <meissner@linux.vnet.ibm.com>
* gcc.target/powerpc/float128-hw4.c: New test.
Back port from trunk
2017-08-14 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/79845
* gcc.target/powerpc/bfp/scalar-extract-exp-4.c: Adjust diagnostic
strings.
* gcc.target/powerpc/bfp/scalar-extract-sig-4.c: Likewise.
* gcc.target/powerpc/bfp/scalar-insert-exp-10.c: Likewise.
* gcc.target/powerpc/bfp/scalar-insert-exp-7.c: Likewise.
* gcc.target/powerpc/bfp/scalar-test-data-class-11.c: Likewise.
* gcc.target/powerpc/bfp/scalar-test-neg-5.c: Likewise.
Added:
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/float128-hw4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr82748-1.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr82748-2.c
Modified:
branches/ibm/gcc-7-branch/gcc/ChangeLog.ibm
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000-builtin.def
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000-c.c
branches/ibm/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/ibm/gcc-7-branch/gcc/config/rs6000/vsx.md
branches/ibm/gcc-7-branch/gcc/doc/extend.texi
branches/ibm/gcc-7-branch/gcc/testsuite/ChangeLog.ibm
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/bfp.exp
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-extract-exp-4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-extract-sig-4.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-insert-exp-10.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-insert-exp-7.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-test-data-class-11.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/bfp/scalar-test-neg-5.c
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/dfp/dfp.exp
branches/ibm/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsu/vsu.exp
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
Date: Thu, 16 Nov 2017 20:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60243
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #15 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #14)
> Author: hubicka
> Date: Fri Mar 28 19:50:28 2014
> New Revision: 208916
>
> URL: http://gcc.gnu.org/viewcvs?rev=208916&root=gcc&view=rev
> Log:
> PR ipa/60243
> * ipa-inline.c (want_inline_small_function_p): Short circuit large
> functions; reorganize to make cheap checks first.
> (inline_small_functions): Do not estimate growth when dumping;
> it is expensive.
> * ipa-inline.h (inline_summary): Add min_size.
> (growth_likely_positive): New function.
> * ipa-inline-analysis.c (dump_inline_summary): Add min_size.
> (set_cond_stmt_execution_predicate): Cleanup.
> (estimate_edge_size_and_time): Compute min_size.
> (estimate_calls_size_and_time): Likewise.
> (estimate_node_size_and_time): Likewise.
> (inline_update_overall_summary): Update min_size.
> (do_estimate_edge_time): Likewise.
> (do_estimate_edge_size): Update.
> (do_estimate_edge_hints): Update.
> (growth_likely_positive): New function.
>
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/ipa-inline-analysis.c
> trunk/gcc/ipa-inline.c
> trunk/gcc/ipa-inline.h
Did this fix it?
>From gcc-bugs-return-581956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:53:38 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/48724] Lto build of mozilla dies at lto-wrapper: error trying to exec 'make -j1': execvp: No such file or directory
Date: Thu, 16 Nov 2017 20:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48724
Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #8)
> This no longer happens with recent Firefox builds, but I think it was rather
> fixed at Firefox buildsystem...
That sounds like WORKSFORME then.
>From gcc-bugs-return-581957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 20:53:40 2017
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Subject: [Bug lto/45375] [meta-bug] Issues with building Mozilla with LTO
Date: Thu, 16 Nov 2017 20:53:00 -0000
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Bug 45375 depends on bug 48724, which changed state.
Bug 48724 Summary: Lto build of mozilla dies at lto-wrapper: error trying to exec 'make -j1': execvp: No such file or directory
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48724
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----------------------------------------------------------------------------
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>From gcc-bugs-return-581958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:13:24 2017
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Subject: [Bug other/53742] bad assembler output when compiling with LTO and PGO
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #10)
> Is the issue still valid?
No response since you asked so I'm guessing not.
>From gcc-bugs-return-581959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:24:39 2017
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83022] malloc & memset -> calloc is not always an optimization
Date: Thu, 16 Nov 2017 21:24:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I am pretty sure this was discussed when the patch was reviewed. IIRC the
original patch was specifically pattern-matching if(p!=0) (with p the result of
malloc) as the only acceptable condition between malloc and memset for this
transformation, but the move to the strlen pass made that inconvenient and it
was decided that always doing the transformation was ok (I hope I am not
rewriting history). If there is a way to check the probability of reaching the
call to memset from the call to malloc (preferably conditional to the fact that
malloc returned something != 0), that could be checked before generating
calloc, but that may not be easy... (compare the local count of the 2 BBs?
That's 10000 and 3300 here, but I see you have already filed PR 83023 to
improve it)
Did you actually hit a measurable slowdown in a real application?
>From gcc-bugs-return-581960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:34:43 2017
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Subject: [Bug fortran/25829] [F03] Asynchronous IO support
Date: Thu, 16 Nov 2017 21:34:00 -0000
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--- Comment #32 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Interestingly, Linux 4.14 contains a way to avoid a context switch to a
threadpool in case the data is already in the page cache:
https://kernelnewbies.org/Linux_4.14#head-8c8861fbded3e87631ab06bcd511f5f0d8bfa220
Might be an interesting optimization sometime in the future..
>From gcc-bugs-return-581961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:41:42 2017
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Subject: [Bug c++/83024] New: ICE in build_address, at cp/typeck.c:5623
Date: Thu, 16 Nov 2017 21:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83024
Bug ID: 83024
Summary: ICE in build_address, at cp/typeck.c:5623
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The following short code ICEs on
$ c++ -v
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 8.0.0 20171112 (experimental) (GCC)
Code that triggers ICE follows:
---------------
#include <optional>
template <class T> struct __optional : std::optional<T>
{
__optional() = default;
__optional(T&& t) : std::optional<T> (std::move(t)) {}
operator bool () const { return (bool)(const std::optional<T>&)*this; }
// <- omit this line and it compiles fine
};
struct A : __optional<int>
{
static __optional<A> parse(auto& q)
{
return A{};
}
};
int main()
{
int q;
auto p = A::parse(q);
return 0;
}
ICE message follows:
---------------------
$ c++ -fconcepts -std=c++1z tt.c -o tt
tt.c: In static member function ‘static __optional<A> A::parse(auto:1&)’:
tt.c:14:12: internal compiler error: in build_address, at cp/typeck.c:5623
return A{};
^
0x931657 build_address(tree_node*)
../../gcc/cp/typeck.c:5623
0x6fe147 add_function_candidate
../../gcc/cp/call.c:2166
0x6ffa87 add_candidates
../../gcc/cp/call.c:5522
0x6fab4e add_candidates
../../gcc/cp/call.c:5433
0x6fab4e build_user_type_conversion_1
../../gcc/cp/call.c:3849
0x6fc4f9 implicit_conversion
../../gcc/cp/call.c:1897
0x6f80a0 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
../../gcc/cp/call.c:10559
0x94a905 check_return_expr(tree_node*, bool*)
../../gcc/cp/typeck.c:9218
0x8ee65e finish_return_stmt(tree_node*)
../../gcc/cp/semantics.c:893
0x843bd5 cp_parser_jump_statement
../../gcc/cp/parser.c:12483
0x843bd5 cp_parser_statement
../../gcc/cp/parser.c:10897
0x844b30 cp_parser_statement_seq_opt
../../gcc/cp/parser.c:11348
0x844c07 cp_parser_compound_statement
../../gcc/cp/parser.c:11302
0x85e2b1 cp_parser_function_body
../../gcc/cp/parser.c:21837
0x85e2b1 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/cp/parser.c:21874
0x860ea6 cp_parser_function_definition_after_declarator
../../gcc/cp/parser.c:26765
0x8620fc cp_parser_late_parsing_for_member
../../gcc/cp/parser.c:27645
0x851c59 cp_parser_class_specifier_1
../../gcc/cp/parser.c:22728
0x853221 cp_parser_class_specifier
../../gcc/cp/parser.c:22754
0x853221 cp_parser_type_specifier
../../gcc/cp/parser.c:16818
Please submit a full bug report,
>From gcc-bugs-return-581962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:43:11 2017
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From: "guille at berkeley dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83024] ICE in build_address, at cp/typeck.c:5623
Date: Thu, 16 Nov 2017 21:43:00 -0000
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--- Comment #1 from Guille <guille at berkeley dot edu> ---
I have tested the unsimplified version of this code, and it ICEs on every
version *after* gcc-8-20170827.
>From gcc-bugs-return-581963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:48:46 2017
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From: "ondrej.certik at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
Date: Thu, 16 Nov 2017 21:48:00 -0000
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OndÅ™ej ÄŒertÃk <ondrej.certik at gmail dot com> changed:
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--- Comment #6 from OndÅ™ej ÄŒertÃk <ondrej.certik at gmail dot com> ---
The finalizers are the most serious problem with gfortran for us. Every other
bug we can workaround one way or another it seems, but the finalizers are very
hard to workaround, one essentially has to comment them out, not just in our
code, but also in all dependencies, and even then that introduces memory leaks.
What exactly is the problem? Is this a bug in the gfortran frontend, or
something more fundamental? Is this a relatively simple fix for somebody who
understands the internals, or would this require a significant time investment
and redesign of the code?
>From gcc-bugs-return-581964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 21:57:01 2017
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Subject: [Bug fortran/83012] [8 Regression] Simply contiguous pointer function not recognized as contiguous
Date: Thu, 16 Nov 2017 21:57:00 -0000
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 42626
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42626&action=edit
patch that appears to work
This seems to work, let's see if it survives regression testing.
>From gcc-bugs-return-581965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:10:12 2017
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83022] malloc & memset -> calloc is not always an optimization
Date: Thu, 16 Nov 2017 22:10:00 -0000
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Yes, this is a measurable degradation in going from gcc 4.9 -> 5.0 with myrocks
DB. Apparently 25% more queries/sec with gcc 4.9 (I think it's from a
benchmark). Profiling (by others) has fingered this optimization.
I am in the process of implementing a check to see if the only condition
between the malloc and memset is 'ptr != 0'.
I noticed the crazy default probabilities during investigating this. I think
that's really a second-order problem.
>From gcc-bugs-return-581966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:11:04 2017
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Subject: [Bug c++/79092] template<auto>: type ignored if value already instantiated
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 8.
>From gcc-bugs-return-581967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:28:12 2017
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Subject: [Bug libstdc++/83025] New: xfstream::open with char* gets caught on C++17 path overload.
Date: Thu, 16 Nov 2017 22:28:00 -0000
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Bug ID: 83025
Summary: xfstream::open with char* gets caught on C++17 path
overload.
Product: gcc
Version: 8.0
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Priority: P3
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Created attachment 42627
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42627&action=edit
Example showing error. Compile with -std=c++17
char* filename = "test.txt"
std::ofstream unit;
unit.open(filename);
when compiled with C++17 gives:
/home/ed/bin/include/c++/8.0.0/fstream: In instantiation of ‘decltype
((void)(((std::basic_ofstream<_CharT,
_Traits>*)this)->std::basic_ofstream<_CharT, _Traits>::_M_filebuf.open(__s,
__mode))) std::basic_ofstream<_CharT, _Traits>::open(const _Path&,
std::ios_base::openmode) [with _Path = char*; _CharT = char; _Traits =
std::char_traits<char>; decltype ((void)(((std::basic_ofstream<_CharT,
_Traits>*)this)->std::basic_ofstream<_CharT, _Traits>::_M_filebuf.open(__s,
__mode))) = void; std::ios_base::openmode = std::_Ios_Openmode]’:
err.cpp:18:27: required from here
/home/ed/bin/include/c++/8.0.0/fstream:895:13: error: request for member
‘c_str’ in ‘__s’, which is of non-class type ‘char* const’
{ open(__s.c_str(), __mode); }
>From gcc-bugs-return-581968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:34:44 2017
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Subject: [Bug libstdc++/83025] xfstream::open with char* gets caught on C++17 path overload.
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--- Comment #1 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
Created attachment 42628
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patch...
enable_if with is_class_v.
>From gcc-bugs-return-581969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:49:29 2017
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From: "spamdrop at fodvo dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/82366] std::regex constructor called from shared library throws std::bad_cast
Date: Thu, 16 Nov 2017 22:49:00 -0000
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--- Comment #5 from spamdrop at fodvo dot org ---
Taking Johnathan's recommendation on Sept 29, I rebuilt the entire app, all
libaries etc using -D_GLIBCXX_USE_CXX11_ABI=0
Carefully isolating the libs and LD_LIBRARY_PATH. Using ABI=0, the program
runs fine. When I repeat the exact same steps without the ABI=0 define, the
program throws the std::bad_cast error.
>From gcc-bugs-return-581970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 22:57:38 2017
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Subject: [Bug tree-optimization/53805] combine_comparisons changes trapping behavior
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--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> > I am happy to relabel this bug (or file a new one if you prefer) as a missed
> > optimization.
>
> I'd say open a new one.
For reference, that's PR 53806.
>From gcc-bugs-return-581971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:20:37 2017
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC|ebotcazou at gcc dot gnu.org |
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-581972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:24:44 2017
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 42629
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42629&action=edit
Tentative fix
The patch makes sure g++ is only used to link and not to compile Ada stuff.
>From gcc-bugs-return-581973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:29:44 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83026] New: missing strlen optimization for strcmp of unequal strings
Date: Thu, 16 Nov 2017 23:29:00 -0000
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Bug ID: 83026
Summary: missing strlen optimization for strcmp of unequal
strings
Product: gcc
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Here's another strcmp optimization opportunity. When strlen() determines that
two strings are of unequal length it's safe to assume they do not compare
equal. Therefore, in the function below, the conditional with the the strcmp()
call can be folded into false.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout c.c
void g (const char *a, const char *b)
{
if (__builtin_strlen (a) == __builtin_strlen (b))
return;
if (!__builtin_strcmp (a, b))
__builtin_abort ();
}
;; Function g (g, funcdef_no=0, decl_uid=1892, cgraph_uid=0, symbol_order=0)
g (const char * a, const char * b)
{
long unsigned int _1;
long unsigned int _2;
int _3;
<bb 2> [local count: 10000]:
_1 = __builtin_strlen (a_5(D));
_2 = __builtin_strlen (b_6(D));
if (_1 == _2)
goto <bb 5>; [20.97%]
else
goto <bb 3>; [79.03%]
<bb 3> [local count: 7903]:
_3 = __builtin_strcmp (a_5(D), b_6(D));
if (_3 == 0)
goto <bb 4>; [0.04%]
else
goto <bb 5>; [99.96%]
<bb 4> [count: 0]:
__builtin_abort ();
<bb 5> [local count: 9997]:
return;
}
>From gcc-bugs-return-581974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:30:40 2017
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Subject: [Bug tree-optimization/83026] missing strlen optimization for strcmp of unequal strings
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82950
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also pr82950 for a related enhancement.
>From gcc-bugs-return-581975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:33:40 2017
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
Date: Thu, 16 Nov 2017 23:33:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |37336
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I think Dominique swapped 2 and 3.
Indeed!
If I compile the tests in comment 0 or 1 with '-fsanitize=address,undefined', I
get at run time an error of the kind:
pr82996.f90:17: runtime error: member access within misaligned address
0x1000e3e7620c for type 'struct foo', which requires 8 byte alignment
0x1000e47d2bec: note: pointer points here
ASAN:DEADLYSIGNAL
=================================================================
==3427==ERROR: AddressSanitizer: SEGV on unknown address 0x12001c8fa57d (pc
0x00010796507b bp 0x7ffee84cd9c0 sp 0x7ffee84cd150 T0)
#0 0x10796507a in wrap_write.part.20
(/opt/gcc/gcc7wr/lib/libasan.4.dylib+0x2507a)
#1 0x109224d2e in __sanitizer::IsAccessibleMemoryRange(unsigned long,
unsigned long) (/opt/gcc/gcc7wr/lib/libubsan.0.dylib+0x17d2e)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/opt/gcc/gcc7wr/lib/libasan.4.dylib+0x2507a)
in wrap_write.part.20
==3427==ABORTING
Program received signal SIGABRT: Process abort signal.
If I remove 'elemental' for 'subroutine foo_destroy', the segfault is gone.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37336
[Bug 37336] [F03] Finish derived-type finalization
>From gcc-bugs-return-581976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:35:22 2017
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
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Zaak <zbeekman at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |zbeekman at gmail dot com
--- Comment #2 from Zaak <zbeekman at gmail dot com> ---
I suspect the source code in question is the same as
https://github.com/sourceryinstitute/OpenCoarrays/blob/8eab16936fb958746575f5c9580ba521320e0444/src/tests/integration/pde_solvers/coarrayBurgers/local_field.F90
>From gcc-bugs-return-581977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 16 23:38:54 2017
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Subject: [Bug fortran/82996] ICE and segfault with derived type finalization
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--- Comment #8 from neil.n.carlson at gmail dot com ---
> If I remove 'elemental' for 'subroutine foo_destroy', the segfault is gone.
In that case the final procedure doesn't match the array component and wouldn't
be called. I suspect that is why the segfault is gone.
>From gcc-bugs-return-581978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 00:02:38 2017
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Subject: [Bug tree-optimization/82950] possible strlen optimization for memcmp/strcmp of arrays
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=78809
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
An even simpler test case:
void g (void)
{
const char a[] = "abc";
const char b[] = "abcd";
if (!__builtin_strcmp (a, b))
__builtin_abort ();
}
See also bug 78809.
>From gcc-bugs-return-581979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 00:05:41 2017
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > Could you please provide the file(s) needed to generate local_field_module.mod?
>
> I suspect the source code in question is the same as ...
This file is not enough to generate local_field_module.mod.
You have to provide a self contained reproducer otherwise the PR will be closed
as INVALID.
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--- Comment #23 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Well, instrumenting a little bit I see that delete_root is getting called many
many many times. So, every call to newunit_alloc is assigning a new unit number
which is getting added to the treap and never reused in anyway.
The result of this is that at the end of the program when any units left on the
treap are deleted, we loop through over one million deletes.
So I now have a better idea of what we need to do.
>From gcc-bugs-return-581981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 02:41:20 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/25829] [F03] Asynchronous IO support
Date: Fri, 17 Nov 2017 02:41:00 -0000
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--- Comment #33 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Janne Blomqvist from comment #32)
> Interestingly, Linux 4.14 contains a way to avoid a context switch to a
> threadpool in case the data is already in the page cache:
> https://kernelnewbies.org/Linux_4.14#head-
> 8c8861fbded3e87631ab06bcd511f5f0d8bfa220
>
> Might be an interesting optimization sometime in the future..
It is interesting that I was reading this very webpage myself today looking at
4.14 feature. I am pretty sure we can hand off the I/O to the OS. I am not so
sure how one checks the status of the operaton. This is what wait should do,
wait for completion.
>From gcc-bugs-return-581982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 03:23:31 2017
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/83027] New: Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 03:23:00 -0000
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Bug ID: 83027
Summary: Hang when attaching a SIGINT handler
Product: gcc
Version: 7.2.0
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Created attachment 42630
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42630&action=edit
The source reprising the bug
Extract attached bug.zip into an empty directory.
Run
make compile
./obj/simple_test
The command simple_test hangs.
The most wonderful thing is that if I do not compile it (as "make compile"
does) as an .a library imported when linking simple_test, but put all source
into a single directory and run "gnatmake simple_test", then the error does
not happen (but Program_Error is raised as it should be accordingly the docs,
because pragma Unreserve_All_Interrupts is not in effect in this example code).
Another weird thing that it happens with SIGINT but not with SIGTERM nor with
SIGCHLD.
The bug also does not happen if I remove "with Ada.Text_IO;".
GCC 7.2.0.
>From gcc-bugs-return-581983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 05:32:48 2017
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Subject: [Bug middle-end/78809] Inline strcmp with small constant strings
Date: Fri, 17 Nov 2017 05:32:00 -0000
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--- Comment #21 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Nov 17 05:32:05 2017
New Revision: 254856
URL: https://gcc.gnu.org/viewcvs?rev=254856&root=gcc&view=rev
Log:
2017-11-15 Qing Zhao <qing.zhao@oracle.com>
PR middle-end/78809
* gimple-fold.c (gimple_fold_builtin_string_compare): Add handling
of replacing call to strncmp with corresponding call to strcmp when
meeting conditions.
PR middle-end/78809
* gcc.dg/strcmpopt_1.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/strcmpopt_1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-581984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 06:27:25 2017
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Subject: [Bug libstdc++/66689] comp_ellint_3 and ellint_3 return garbage values
Date: Fri, 17 Nov 2017 06:27:00 -0000
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--- Comment #4 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
My last comment is nuts. I was thrown by the fact that GSL, against which I've
been testing, and the Carlson papers that form the basis if the implementation
use the +nu convention. I must change this. This is a huge bug.
>From gcc-bugs-return-581985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 06:29:22 2017
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Subject: [Bug libstdc++/66689] comp_ellint_3 and ellint_3 return garbage values
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--- Comment #5 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
in other news I've switched to boost to test this.
>From gcc-bugs-return-581986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 07:36:53 2017
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From: "ixsci at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83028] New: Incorrect -Wsequence-point warning in correct C++17 code with new evaluation order rules
Date: Fri, 17 Nov 2017 07:36:00 -0000
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Bug ID: 83028
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Compiling the following code:
#include <iostream>
using namespace std;
int main()
{
int i = 0;
cout << i++ << " " << i++ << "\n";
};
with the latest gcc (compiled on wandbox.org) and -std=c++1z gives the
following warning:
operation on 'i' may be undefined [-Wsequence-point]
cout << i++ << " " << i++ << "\n";
But there should be no warnings since both modifications are sequenced and the
result is well defined.
>From gcc-bugs-return-581987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 07:43:07 2017
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Subject: [Bug testsuite/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Fri, 17 Nov 2017 07:43:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 17 07:42:28 2017
New Revision: 254857
URL: https://gcc.gnu.org/viewcvs?rev=254857&root=gcc&view=rev
Log:
PR testsuite/82997
* gcc.dg/cpp/macsyntx.c (var1, rest): Don't expect
"requires at least one" warning.
* gcc.dg/cpp/sysmac1.c (foo): Likewise.
* gcc.dg/cpp/macsyntx2.c: New test.
* gcc.dg/cpp/sysmac3.c: New test.
* gcc.dg/cpp/sysmac3.h: New file.
Added:
trunk/gcc/testsuite/gcc.dg/cpp/macsyntx2.c
trunk/gcc/testsuite/gcc.dg/cpp/sysmac3.c
trunk/gcc/testsuite/gcc.dg/cpp/sysmac3.h
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/cpp/macsyntx.c
trunk/gcc/testsuite/gcc.dg/cpp/sysmac1.c
>From gcc-bugs-return-581988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:20:29 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-17
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Please provide a standalone reproducer without project file.
>From gcc-bugs-return-581989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:32:09 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 08:32:00 -0000
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simon at pushface dot org changed:
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CC| |simon at pushface dot org
--- Comment #2 from simon at pushface dot org ---
You should state what OS you’re using.
After fixing the problems with the GPRs (withing projects that don’t
necessarily exist on the user’s machine), PE is correctly raised on darwin
16.7.0 with GCC 7.1.0.
>From gcc-bugs-return-581990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:49:57 2017
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Subject: [Bug libgomp/82901] GOACC_declare calls GOACC_enter_exit_data with async arg 0
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Tom de Vries <vries at gcc dot gnu.org> changed:
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01430.html
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Subject: [Bug rtl-optimization/82982] [8 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler
Date: Fri, 17 Nov 2017 08:53:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Doesn't reproduce without graphite. Likely the problem is in
rank_for_schedule.
>From gcc-bugs-return-581993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:56:49 2017
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Subject: [Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc
Date: Fri, 17 Nov 2017 08:56:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
On trunk it does (with -m32 -O2):
g:
rlwinm 9,4,0,25,31
rlwinm 4,4,0,0,24
lbzx 3,3,9
rlwinm 3,3,0,25,31
or 3,3,4
blr
>From gcc-bugs-return-581992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:56:13 2017
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From: "andreas.longva_fraunhofer at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83029] New: Memory leaks due to leaked thread local variable
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Bug ID: 83029
Summary: Memory leaks due to leaked thread local variable
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: andreas.longva_fraunhofer at yahoo dot com
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GCC version: 6.4.0, but I've been able to reproduce this also in 4.9.1 and
6.3.0.
System: Linux x86-64, Scientific Linux 7.4
I've attached two minimal test cases (preprocessed) which showcase the behavior
I am about to describe:
main.cpp/main.ii:
- This is the minimal test case which is closest in spirit to our original,
far more complex code.
- Compiler invocation: g++ -v -save-temps -std=c++11 -pthread -g -O0 main.cpp
-Wall -Wextra
main2.cpp/main2.ii:
- This is a minimal test case which is intended to show that destructors are
not being properly called in some scenarios.
- Compiler invocation: g++ -v -save-temps -o main2.out -std=c++11 -pthread -g
-O0 main2.cpp -Wall -Wextra
Note that after discussing with redi and others on #gcc (freenode), it appears
that the version of glibc is relevant for reproducing the bug (it appears that
glibc >= 2.18 is probably not affected. My understanding is that for glibc <
2.18, gcc falls back to a fallback implementation for cleaning up thread local
variables), and so the environment is crucial for reproduction.
Here's the valgrind output for the binary file produced by main.cpp:
$ valgrind --leak_check=full ./
==32488== Memcheck, a memory error detector
==32488== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==32488== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==32488== Command: ./main.out
==32488==
==32488==
==32488== HEAP SUMMARY:
==32488== in use at exit: 4,120 bytes in 2 blocks
==32488== total heap usage: 14 allocs, 12 frees, 81,552 bytes allocated
==32488==
==32488== 24 bytes in 1 blocks are definitely lost in loss record 1 of 2
==32488== at 0x4C2A456: operator new(unsigned long, std::nothrow_t const&)
(vg_replace_malloc.c:377)
==32488== by 0x4EC2AA5: __cxa_thread_atexit (atexit_thread.cc:142)
==32488== by 0x401208: __tls_init (main.cpp:6)
==32488== by 0x4013E9: TLS wrapper function for vec[abi:cxx11] (in
/home/alongva/test/main.out)
==32488== by 0x40137D: Pool::Pool()::{lambda()#1}::operator()() const
(main.cpp:18)
==32488== by 0x402635: void std::_Bind_simple<Pool::Pool()::{lambda()#1}
()>::_M_invoke<>(std::_Index_tuple<>) (functional:1391)
==32488== by 0x4025D2: std::_Bind_simple<Pool::Pool()::{lambda()#1}
()>::operator()() (functional:1380)
==32488== by 0x40256D:
std::thread::_State_impl<std::_Bind_simple<Pool::Pool()::{lambda()#1} ()>
>::_M_run() (thread:197)
==32488== by 0x4EEF40E: execute_native_thread_routine (thread.cc:83)
==32488== by 0x56D6E24: start_thread (in /usr/lib64/libpthread-2.17.so)
==32488== by 0x59E334C: clone (in /usr/lib64/libc-2.17.so)
==32488==
==32488== 4,096 bytes in 1 blocks are definitely lost in loss record 2 of 2
==32488== at 0x4C2A203: operator new(unsigned long)
(vg_replace_malloc.c:334)
==32488== by 0x4022A5:
__gnu_cxx::new_allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > >::allocate(unsigned long, void
const*) (new_allocator.h:104)
==32488== by 0x40219E:
std::allocator_traits<std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > >
>::allocate(std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > >&, unsigned long)
(alloc_traits.h:436)
==32488== by 0x402017: std::_Vector_base<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > > >::_M_allocate(unsigned long) (stl_vector.h:170)
==32488== by 0x401A5D: void std::vector<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > >
>::_M_emplace_back_aux<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > >(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >&&) (vector.tcc:412)
==32488== by 0x401722: void std::vector<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > > >::emplace_back<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >
>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>
>&&) (vector.tcc:101)
==32488== by 0x40155F: std::vector<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > > >::push_back(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >&&) (stl_vector.h:933)
==32488== by 0x40138F: Pool::Pool()::{lambda()#1}::operator()() const
(main.cpp:18)
==32488== by 0x402635: void std::_Bind_simple<Pool::Pool()::{lambda()#1}
()>::_M_invoke<>(std::_Index_tuple<>) (functional:1391)
==32488== by 0x4025D2: std::_Bind_simple<Pool::Pool()::{lambda()#1}
()>::operator()() (functional:1380)
==32488== by 0x40256D:
std::thread::_State_impl<std::_Bind_simple<Pool::Pool()::{lambda()#1} ()>
>::_M_run() (thread:197)
==32488== by 0x4EEF40E: execute_native_thread_routine (thread.cc:83)
==32488==
==32488== LEAK SUMMARY:
==32488== definitely lost: 4,120 bytes in 2 blocks
==32488== indirectly lost: 0 bytes in 0 blocks
==32488== possibly lost: 0 bytes in 0 blocks
==32488== still reachable: 0 bytes in 0 blocks
==32488== suppressed: 0 bytes in 0 blocks
==32488==
==32488== For counts of detected and suppressed errors, rerun with: -v
==32488== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
And here is the output from the second binary (running valgrind on it would
also show memory leaks):
$ ./main2.out
Constructing printer.
Constructing printer.
Printing something...
Destroying printer...
Printing something...
As seen from above, it is suggested that two thread_local Printer instances are
instantiated, but only one is destroyed (unless std::puts is not reliable in
this instance). Note that the behavior is also not entirely deterministic:
sometimes the binary runs without leaks, and in the first case, if one reduces
the loop counter from `i < 100` to say `i < 1`, it only sometimes triggers the
leak as reported by valgrind.
>From gcc-bugs-return-581994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 08:59:01 2017
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From: "andreas.longva_fraunhofer at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
Date: Fri, 17 Nov 2017 08:59:00 -0000
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--- Comment #1 from Andreas Longva <andreas.longva_fraunhofer at yahoo dot com> ---
Created attachment 42631
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42631&action=edit
Attachments as described in the bug report
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Subject: [Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82940
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
In combine, we start with
insn_cost 4 for 10: r137:SI=r136:QI#0&0x7f
REG_DEAD r136:QI
insn_cost 4 for 13: r140:SI=r132:SI&0xffffffffffffff80
REG_DEAD r132:SI
insn_cost 4 for 16: r143:SI=r137:SI|r140:SI
REG_DEAD r140:SI
REG_DEAD r137:SI
insn_cost 4 for 17: r144:SI=zero_extend(r143:SI#3)
REG_DEAD r143:SI
It then tries:
Trying 13, 10 -> 16:
13: r140:SI=r132:SI&0xffffffffffffff80
REG_DEAD r132:SI
10: r137:SI=r136:QI#0&0x7f
REG_DEAD r136:QI
16: r143:SI=r137:SI|r140:SI
REG_DEAD r140:SI
REG_DEAD r137:SI
Failed to match this instruction:
(set (reg:SI 143)
(ior:SI (and:SI (reg/v:SI 132 [ v+-3 ])
(const_int 128 [0x80]))
(and:SI (subreg:SI (reg:QI 136 [ *_2 ]) 0)
(const_int 127 [0x7f]))))
which fails because that isn't an existing instruction (the -0x80 was
optimised to 0x80).
Then 16->17 is done (throwing away the useless extend), and of course
10,13->17 won't work after that.
So it's a case of the general problem that combine using known values
of registers often hurts instead of helps.
>From gcc-bugs-return-581996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:19:41 2017
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Subject: [Bug ipa/82908] [8 regression] gcc.dg/tree-prof/cmpsf-1.c and gcc.dg/tree-prof/20050826-2.c fail starting with r254452
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>From gcc-bugs-return-581997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:20:29 2017
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Subject: [Bug tree-optimization/82946] member pointer defeats strlen optimization involving a string literal
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 16 Nov 2017, msebor at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82946
>
> --- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #5)
> > This means you can very well replace memcpy with strcpy if you know
> > there's a '\0' in and only in the right place.
>
> Sure, except when dealing with a string literal we know that the source is a
> string literal and not a pointer representation disguised as a sequence of
> bytes. The optimization I'm referring to is specifically for string literals:
>
> unsigned g (struct A *a)
> {
> strcpy (a->d, "123"); // here we have a literal, not the representation
> of a pointer
> return strlen (a->d); // a->d must be a valid pointer
> }
>
> > We certainly have to treat literal pointers encoded in any form
> > conservatively. I don't see how they are against any standard. There's
> > other clearly "valid" optimizations missing in GCC that look more
> > important to implement.
>
> The C and C++ standards are clear as to what are valid pointer values and how
> they can come about. Copying the representation from an arbitrary constant of
> an incompatible type into a pointer object is certainly not one of them. I.e.,
> this:
>
> const char a[] = "123";
> char *p;
> memcpy (&p, a, sizeof p);
> strlen (p);
>
> is undefined, but this is of course valid:
>
> const char a[4] = "123";
> char *p;
> char *q = a;
> memcpy (&p, &q, sizeof p);
> strlen (p);
>
> because it just copies the representation of what's known to be a valid pointer
> value into another pointer object of a compatible type.
>
> The point is that the bytes of no string literal can also be a valid pointer
> value, even if it happens to have the same representation as one, and this can
> be exploited to allow the optimization above. It will not invalidate any
> correct programs. It would be not only invalid but downright silly for a
> program to represent valid addresses as string literals. Embedded programs of
> course do hardcode pointer values, but not in string literals: they hardcode
> them as integers, e.g.,
>
> void *my_register = (void*)0x123;
>
> but never like so:
>
> char my_register[] = "123";
Ok. I guess I have some patches somewhere that "properly" distinguish
string literals during points-to analysis which might help this case.
Or maybe not.
As with the other cases I have a hard time to imagine how to implement
and to transfer such knowledge to the alias-oracle / IL.
>From gcc-bugs-return-581998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:22:33 2017
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Subject: [Bug target/82907] [8 regression] gcc.target/powerpc/p9-xxbr-1.c fails after r254464
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is fixed.
>From gcc-bugs-return-581999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:31:21 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so we do slightly better for the runtime test than for the static test:
if (loop->inner)
m_p_thread=2;
else
m_p_thread=MIN_PER_THREAD;
so with 2 threads we should have exactly 2 iterations but ... the runtime
check uses the number of latch executions which is 3 and thus arrives at
1 iteration per thread. Fixing this off-by-one get's us
> /usr/bin/time ./a.out
PI 2.98876095
PI 3.14159274
4.02user 0.00system 0:04.02elapsed 99%CPU (0avgtext+0avgdata 2460maxresident)k
0inputs+0outputs (0major+102minor)pagefaults 0swaps
vs.
> /usr/bin/time ./a.out
PI 8.59536934
PI 3.14159274
10.90user 0.00system 0:05.54elapsed 196%CPU (0avgtext+0avgdata
2840maxresident)k
0inputs+0outputs (0major+126minor)pagefaults 0swaps
I guess the different computation outcome means we're doing sth wrong
somewhere.
Also at least on my machine the result isn't any faster (when parallelizing
the outer loop). As usual auto-parallelization may harm followup transforms.
>From gcc-bugs-return-582000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:34:41 2017
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Subject: [Bug target/82767] [8 regression] gcc.target/i386/pr71321.c scan-assembler-times fail
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--- Comment #4 from Sebastian Peryt <sebastian.peryt at intel dot com> ---
Created attachment 42632
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42632&action=edit
Proposed patch to fix PR.
Better patch.
>From gcc-bugs-return-582001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:36:27 2017
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Subject: [Bug target/82621] [6/7/8 Regression] wrong code with -Og -fgcse -fweb
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed; mine.
>From gcc-bugs-return-582002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:41:36 2017
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Subject: [Bug gcov-profile/83030] New: [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
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Bug ID: 83030
Summary: [8 regression] ICE in create_pseudo_cfg, at
dwarf2cfi.c:2840
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
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CC: ebotcazou at gcc dot gnu.org, hubicka at gcc dot gnu.org,
marxin at gcc dot gnu.org
Target Milestone: ---
Host: sparc-sun-solaris2.11
Target: sparc-sun-solaris2.11
Build: sparc-sun-solaris2.11
Between 20171115 (r254778) and 20171116 (r254837), one testcase regressed on
Solaris 11/SPARC (both 32 and 64-bit):
+FAIL: g++.dg/tree-prof/partition1.C compilation, -fprofile-use -D_PROFILE_USE
(internal compiler error)
+UNRESOLVED: g++.dg/tree-prof/partition1.C execution, -fprofile-use
-D_PROFILE_USE
during RTL pass: dwarf2
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/tree-prof/partition1.C: In
function 'int main()':
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/tree-prof/partition1.C:53:1:
internal compiler error: in create_pseudo_cfg, at dwarf2cfi.c:2840
0x89a92b create_pseudo_cfg
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2840
0x89a92b execute_dwarf2_frame
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:3010
0x89a92b execute
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:3501
Given the timeframe, it seems likely that one of Jan's patches is the culprit.
Rainer
>From gcc-bugs-return-582003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:42:11 2017
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Subject: [Bug gcov-profile/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
Date: Fri, 17 Nov 2017 09:42:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-582004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:44:02 2017
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Subject: [Bug target/82621] [6/7/8 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Trying 77 -> 90:
77: {r196:SI=0-r188:SI;ca:SI=leu(r188:SI,0);}
REG_UNUSED ca:SI
90: {r197:SI=r196:SI+r196:SI+ca:SI;clobber ca:SI;}
REG_DEAD r196:SI
REG_DEAD ca:SI
REG_UNUSED ca:SI
So combine did everything correctly here (the unused was here at the
start already). Where did it come from?
>From gcc-bugs-return-582005-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:47:19 2017
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Subject: [Bug target/82621] [6/7/8 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Lack of coffee: the CA feeding into insn 90 is from insn 89, not from 77.
>From gcc-bugs-return-582006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 09:54:34 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so the correctness issue is that 'tmp' is treated as shared by autopar.
Clearly while the outer loop iterations are independent the dependence in the
inner loop should make autopar privatize this array.
But this looks like a latent issue to me, regular dependence analysis
should have figured out the tmp = 0 in each iteration makes them
independent on tmp.
>From gcc-bugs-return-582007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 10:15:57 2017
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Subject: [Bug other/70268] add option -ffile-prefix-map to map one directory name (old) to another (new) in __FILE__, __BASE_FILE__and __builtin_FILE()
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--- Comment #9 from Boris Kolpackov <boris at kolpackov dot net> ---
I've proposed a different implementation (and a bit different options names)
here:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01451.html
>From gcc-bugs-return-582008-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 10:50:48 2017
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Subject: [Bug tree-optimization/82604] [8 Regression] SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used
Date: Fri, 17 Nov 2017 10:50:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it still parallelizes the loop(s) but at one level deeper (line 176 vs.
173).
This is because dependence analysis does not handle calls and loop distribution
distributed a memset. ISL dependence analysis will have the same issue.
I've quickly tried replacing memset with *p = {} which somewhat works
when wrapping the LHS with a WITH_SIZE_EXPR. It later ICEs, but well.
RTL expansion suggests we expect it on the RHS, so *p = WITH_SIZE_EXPR <{}, n}
but that doesn't parallelize again (dependence analysis is confused).
I think the proper fix is to dependence analysis in get_references_in_stmt,
similar to how we handle masked loads/stores.
>From gcc-bugs-return-582009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:01:55 2017
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Subject: [Bug tree-optimization/82604] [8 Regression] SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Sth like the following which only works up to the point of dependence analysis
trying to disambiguate this ref against others ... I suppose some
dr_may_alias_p tweaks to consider niter information and step/size to do
a "simple" offset based overlap test is missing.
Index: gcc/tree-data-ref.c
===================================================================
--- gcc/tree-data-ref.c (revision 254858)
+++ gcc/tree-data-ref.c (working copy)
@@ -4827,7 +4827,7 @@ get_references_in_stmt (gimple *stmt, ve
clobbers_memory = true;
break;
}
- else
+ else if (! gimple_call_builtin_p (stmt, BUILT_IN_MEMSET))
clobbers_memory = true;
}
else if (stmt_code == GIMPLE_ASM
@@ -4888,6 +4888,12 @@ get_references_in_stmt (gimple *stmt, ve
default:
break;
}
+ else if (gimple_call_builtin_p (stmt, BUILT_IN_MEMSET))
+ {
+ ref.ref = fold_build2 (MEM_REF, build_array_type (char_type_node,
build_index_type (gimple_call_arg (stmt, 2))), gimple_call_arg (stmt, 0),
build_zero_cst (ptr_type_node));
+ references->safe_push (ref);
+ return false;
+ }
op0 = gimple_call_lhs (stmt);
n = gimple_call_num_args (stmt);
>From gcc-bugs-return-582010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:03:20 2017
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Subject: [Bug target/83031] New: Tail call optimization not used in cases when first part of the result is returned from function
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Bug ID: 83031
Summary: Tail call optimization not used in cases when first
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Following code:
struct ts {int a, b; };
ts foo();
int testing1() {
return foo().a;
}
Produces suboptimal assembly:
testing1():
sub rsp, 8
call foo()
add rsp, 8
ret
More optimal would be the following assembly:
testing1():
jmp foo() <== `a` is already in eax
>From gcc-bugs-return-582012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:09:45 2017
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Subject: [Bug c/82963] -Waddress too trigger happy
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Arnd Bergmann <arnd at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |arnd at linaro dot org
--- Comment #4 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Michal Hocko from comment #1)
> Btw. the compiler doesn't complain if I rewrite the macro to do an explicit
> NULL check
> (maskp != NULL) ? MAX_NUMNODES : 0, (maskp != NULL) ? (maskp)->bits : NULL
As it turned out, that workaround only worked for gcc-7 and higher, as well as
gcc-4.5 and lower. Anything in-between now prints a variation of "warning: the
comparison will always evaluate as ‘true’ for the address of ‘nodes’ will never
be NULL". I just sent another workaround to move the comparison into an inline
function, which should always work.
It appears that at some point during the gcc-7 development, the "comparison
will always evaluate as 'true'" logic was turned off for comparisons inside of
macros, while the "the address of 'nodes' will always evaluate as 'true'" check
did not get changed the same way.
>From gcc-bugs-return-582011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:09:05 2017
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Subject: [Bug tree-optimization/82604] [8 Regression] SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used
Date: Fri, 17 Nov 2017 11:09:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
failed loop-distribution hack: (still needs dependence analysis fixes)
Could even preserve TBAA if we use a {} of correct element array type.
For constant sizes this should be always a win.
Index: gcc/tree-loop-distribution.c
===================================================================
--- gcc/tree-loop-distribution.c (revision 254858)
+++ gcc/tree-loop-distribution.c (working copy)
@@ -1006,9 +1006,22 @@ generate_memset_builtin (struct loop *lo
val = tem;
}
- fn = build_fold_addr_expr (builtin_decl_implicit (BUILT_IN_MEMSET));
- fn_call = gimple_build_call (fn, 3, mem, val, nb_bytes);
- gsi_insert_after (&gsi, fn_call, GSI_CONTINUE_LINKING);
+ if (! integer_zerop (val))
+ {
+ fn = build_fold_addr_expr (builtin_decl_implicit (BUILT_IN_MEMSET));
+ fn_call = gimple_build_call (fn, 3, mem, val, nb_bytes);
+ gsi_insert_after (&gsi, fn_call, GSI_CONTINUE_LINKING);
+ }
+ else
+ {
+ tree arrt = build_array_type (char_type_node, NULL_TREE);
+ gassign *ass = gimple_build_assign (build2 (MEM_REF, arrt,
+ mem, build_zero_cst
(ptr_type_node)),
+ build2 (WITH_SIZE_EXPR, arrt,
+ build_constructor (arrt,
NULL),
+ nb_bytes));
+ gsi_insert_after (&gsi, ass, GSI_CONTINUE_LINKING);
+ }
if (dump_file && (dump_flags & TDF_DETAILS))
{
>From gcc-bugs-return-582013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:21:38 2017
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
Date: Fri, 17 Nov 2017 11:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |7.3
>From gcc-bugs-return-582014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:24:00 2017
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Subject: [Bug middle-end/83023] branch probabilities pessimize malloc
Date: Fri, 17 Nov 2017 11:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
True! I guess ptr != 0 should be differently predicted? Usually it might
work because code is
p = malloc ();
if (!p)
abort ();
>From gcc-bugs-return-582015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:35:15 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83025] [8 Regression] xfstream::open with char* gets caught on C++17 path overload.
Date: Fri, 17 Nov 2017 11:35:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Known to work| |7.2.0
Keywords| |rejects-valid
Last reconfirmed| |2017-11-17
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
Summary|xfstream::open with char* |[8 Regression]
|gets caught on C++17 path |xfstream::open with char*
|overload. |gets caught on C++17 path
| |overload.
Target Milestone|--- |8.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops. Even with the patch the new overload will be used for std::string
arguments, which works but isn't right.
I'll constrain it further to only match path-like things.
>From gcc-bugs-return-582016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:51:18 2017
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Subject: [Bug c++/71192] Coredump - SIGSEGV exception handling on GCC 4.8.2 in Solaris 11.3, Solaris 11.2 works with same GCC version
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> redoing https://gcc.gnu.org/ml/gcc-bugs/2017-08/msg01606.html
>
> Eric Gallager <egallager at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2017-08-14
> CC| |egallager at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
> Could you please:
>
> - attach the preprocessed source that triggers this bug
> - try again with a version of GCC that is still supported, and
> - specify your full target triplet?
No response, closing.
>From gcc-bugs-return-582017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 11:55:25 2017
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Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-582018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 12:19:25 2017
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Subject: [Bug target/49526] extra move instruction for smmul
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Matthijs van Duin <matthijsvanduin at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |matthijsvanduin at gmail dot com
--- Comment #5 from Matthijs van Duin <matthijsvanduin at gmail dot com> ---
So... what happened to this patch? Why was it never applied?
>From gcc-bugs-return-582019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 12:26:38 2017
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Subject: [Bug middle-end/83022] malloc & memset -> calloc is not always an optimization
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-17
Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
working on a patch. This also occurred in mysql 5.6, and the 5.7 release
refactored the code to avoid the problem.
>From gcc-bugs-return-582020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 12:34:22 2017
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Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
Date: Fri, 17 Nov 2017 12:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-17
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not by this commit. Jakubs testcase is still slow in GCC 7 (and uses >28GB
memory - ick, didn't even finish compiling).
We seem to blow up during early inlining here, because we get BBs with
millions of
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
__asm__ __volatile__("" : : : "memory");
...
counting those as zero size probably isn't wise if we don't "optimize"
them during inlining...
This issue likely hides the underlying old issue.
case GIMPLE_ASM:
{
int count = asm_str_count (gimple_asm_string (as_a <gasm *> (stmt)));
/* 1000 means infinity. This avoids overflows later
with very long asm statements. */
if (count > 1000)
count = 1000;
return count;
}
should return MIN (1, count) even if in this case the asm doesn't generate
any code.
>From gcc-bugs-return-582021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 12:42:13 2017
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Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
Date: Fri, 17 Nov 2017 12:42:00 -0000
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
So, add a comment in the asm to make the testcase test the same as originally
for this PR (seems to peak at ~2GB then).
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
1182 kB ( 0%) ggc
phase parsing : 6.53 ( 3%) usr 7.40 (73%) sys 13.93 ( 6%) wall
611643 kB (19%) ggc
phase opt and generate : 202.70 (97%) usr 2.70 (27%) sys 205.41 (94%) wall
2569108 kB (81%) ggc
ipa profile : 14.77 ( 7%) usr 0.00 ( 0%) sys 14.77 ( 7%) wall
0 kB ( 0%) ggc
ipa SRA : 127.88 (61%) usr 0.89 ( 9%) sys 129.17 (59%) wall
619431 kB (19%) ggc
early inlining heuristics: 3.74 ( 2%) usr 0.00 ( 0%) sys 3.64 ( 2%) wall
1928 kB ( 0%) ggc
tree CFG construction : 8.73 ( 4%) usr 0.05 ( 0%) sys 8.77 ( 4%) wall
651524 kB (20%) ggc
tree operand scan : 10.61 ( 5%) usr 0.33 ( 3%) sys 10.77 ( 5%) wall
95009 kB ( 3%) ggc
scheduling 2 : 3.69 ( 2%) usr 0.02 ( 0%) sys 3.80 ( 2%) wall
502 kB ( 0%) ggc
TOTAL : 209.23 10.10 219.35
3181942 kB
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Subject: [Bug target/80479] [7/8 Regression] strcmp() produces valgrind errors on ppc64le
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jseward at acm dot org changed:
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--- Comment #17 from jseward at acm dot org ---
(In reply to acsawdey from comment #13)
> The tests that I have done show that the inline code is 2-3x faster than
> glibc (depending on which glibc you are testing).
Are you sure this transformation is actually a win on real (big) programs?
The inline translation is so verbose that I wonder how many instances you
need before you wind up adversely affecting your icache miss rates.
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Subject: [Bug tree-optimization/83022] malloc & memset -> calloc is not always an optimization
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #2)
> I noticed the crazy default probabilities during investigating this. I
> think that's really a second-order problem.
It's just that comparing the frequencies (or however they are called now) could
be an easier and less restrictive check than exact CFG matching.
>From gcc-bugs-return-582024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 13:16:18 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 17 13:15:34 2017
New Revision: 254867
URL: https://gcc.gnu.org/viewcvs?rev=254867&root=gcc&view=rev
Log:
2017-11-17 Richard Biener <rguenther@suse.de>
PR tree-optimization/83017
* tree-parloops.c (MIN_PER_THREAD): Use --param
parloops-min-per-thread.
(gen_parallel_loop): Properly count iterations.
(parallelize_loops): Handle loop->can_be_parallel independent
of flag_loop_parallelize_all. Make static profitability test match
the runtime one.
* params.def (PARAM_PARLOOPS_MIN_PER_THREAD): New.
* invoke.texi (parloops-min-per-thread): Document.
* gcc.dg/autopar/pr49960.c: Adjust.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
trunk/gcc/params.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/autopar/pr49960.c
trunk/gcc/tree-parloops.c
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Subject: [Bug tree-optimization/82627] [8 regression] r253809 breaks test cases gcc.dg/graphite/interchange-3.c -7.c, -9.c, and uns-interchange-9.c
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
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----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #7 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
The exact same thing happens on Intel Silvermont.
>From gcc-bugs-return-582026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 13:37:17 2017
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 17 13:36:37 2017
New Revision: 254869
URL: https://gcc.gnu.org/viewcvs?rev=254869&root=gcc&view=rev
Log:
2017-11-17 Richard Biener <rguenther@suse.de>
PR fortran/83017
* tree-core.h (enum annot_expr_kind): Add annot_expr_parallel_kind.
* tree-pretty-print.c (dump_generic_node): Handle
annot_expr_parallel_kind.
* tree-cfg.c (replace_loop_annotate_in_block): Likewise.
* gimplify.c (gimple_boolify): Likewise.
fortran/
* trans-stmt.c (gfc_trans_forall_loop): Annotate DO CONCURRENT
loops with annot_expr_parallel_kind instead of just
annot_expr_ivdep_kind.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/gimplify.c
trunk/gcc/tree-cfg.c
trunk/gcc/tree-core.h
trunk/gcc/tree-pretty-print.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83017
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
"Fixed".
That is, it seems slower plus it computes wrong results ;)
You might want to open a bugreport if it turns out to be a bug.
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Subject: [Bug libstdc++/83025] [8 Regression] xfstream::open with char* gets caught on C++17 path overload.
Date: Fri, 17 Nov 2017 14:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83025
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Nov 17 14:07:58 2017
New Revision: 254871
URL: https://gcc.gnu.org/viewcvs?rev=254871&root=gcc&view=rev
Log:
PR libstdc++/83025 fix constraints for path overloads in <fstream>
PR libstdc++/83025
* include/std/fstream (basic_filebuf::_If_path): Move to
namespace-scope and rename to _If_fs_path.
(basic_filebuf::open): Use new name.
(basic_ifstream(_Path, ios::openmode))
(basic_ifstream::open(_Path, ios::openmode))
(basic_ofstream(_Path, ios::openmode))
(basic_ofstream::open(_Path, ios::openmode))
(basic_fstream(_Path, ios::openmode))
(basic_fstream::open(_Path, ios::openmode)): Use _If_fs_path.
* testsuite/27_io/basic_filebuf/open/char/path.cc: Test with filename
as non-const char*.
* testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
* testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
* testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/fstream
trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/open/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_fstream/open/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_ifstream/open/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_ofstream/cons/char/path.cc
trunk/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
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Subject: [Bug libstdc++/83025] [8 Regression] xfstream::open with char* gets caught on C++17 path overload.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #18 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Hi,
I'm seeing random results on:
c-c++-common/Wstringop-truncation.c -Wc++-compat (test for warnings, line
210)
c-c++-common/Wstringop-truncation.c -Wc++-compat (test for warnings, line
211)
on aarch64/arm targets if that matters.
By random, I mean sometimes these two tests pass, sometimes they fail.
May it mean that the patch (r254630) has an undefined behavior code path?
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Subject: [Bug other/71212] Compilation of gcc (libstdc++) for foreign target platform problem.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted to https://gcc.gnu.org/ml/gcc-patches/2017-09/msg01332.html
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Subject: [Bug c++/83020] ('17) Class template constructor call skipped with no error when substitution fails in default argument
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-17
Known to work| |6.4.0, 8.0
Ever confirmed|0 |1
Known to fail| |7.2.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Seems to be already fixed on trunk.
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 14:34:00 -0000
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--- Comment #3 from Victor Porton <porton at narod dot ru> ---
GCC 7.2.0, Debian Linux 4.13.0.
Eric Botcazou: I can't make a standalone reproducer without project file,
because the bug appears only when I compile in two stages: creating an .a
library and then linking with this library.
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Subject: [Bug rtl-optimization/82621] [6/7/8 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Nov 17 14:46:04 2017
New Revision: 254874
URL: https://gcc.gnu.org/viewcvs?rev=254874&root=gcc&view=rev
Log:
combine: Don't split insns if half is unused (PR82621)
If we have a PARALLEL of two SETs, and one half is unused, we currently
happily split that into two instructions (although the unused one is
useless). Worse, as PR82621 shows, combine will happily merge this
insn into I3 even if some intervening insn sets the same register
again, which is wrong.
This fixes it by not splitting PARALLELs with REG_UNUSED notes. It
all is handled fine by combine in that case: just the "single set
that is unused" case isn't handled properly.
This also results in better code: combine will now actually throw
away the unused SET. (It still won't do that in an I3).
PR rtl-optimization/82621
* combine.c (try_combine): Do not split PARALLELs of two SETs if the
dest of one of those SETs is unused.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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--- Comment #4 from Victor Porton <porton at narod dot ru> ---
If I remove `with "ahven";` from spawn_tests.gpr the bug disappears.
Seems to do something with elaboration order.
I also deleted `with "anet";` from spawn_common.gpr without any effect on the
bug.
I will attach bug2.zip without `with "anet";` (but with `with "ahven";`).
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #5 from Victor Porton <porton at narod dot ru> ---
Created attachment 42633
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42633&action=edit
The source reprising the bug without "ainet"
Needs "ahven" to reprise the bug.
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