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* [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
[not found] <bug-80280-4@http.gcc.gnu.org/bugzilla/>
@ 2017-05-03 2:42 ` msebor at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: msebor at gcc dot gnu.org @ 2017-05-03 2:42 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80280
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, patch
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-03
CC| |msebor at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I confirm that these problem have indeed been fixed. To prevent them from
cropping up again, I've put together an enhancement to -Wformat to detect them
before they get injected into the code base. I'll use this bug as a reference
for the patch set:
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00150.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00151.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00152.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00153.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00154.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00155.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00156.html
>From gcc-bugs-return-562389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 03:31:44 2017
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From: "coypu at sdf dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80600] New: hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 03:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80600
Bug ID: 80600
Summary: hidden symbol `__cpu_model' is referenced by DSO
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: coypu at sdf dot org
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building a simple fortran hello world:
/usr/bin/ld: a.out: hidden symbol `__cpu_model' in
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/libgcc.a(cpuinfo.o) is referenced by
DSO
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
Trying the test case in target/65612 which sounds related:
mv20.cc:11:5: error: multiversioning needs ifunc which is not supported on this
target
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 03:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80600
--- Comment #1 from coypu <coypu at sdf dot org> ---
Related and possible duplicate for dfly: libgcc/61309
>From gcc-bugs-return-562391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 06:24:04 2017
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From: "jens.maurer at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80601] New: spurious -Wconversion warning with explicit class template arguments
Date: Wed, 03 May 2017 06:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80601
Bug ID: 80601
Summary: spurious -Wconversion warning with explicit class
template arguments
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
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The all-new gcc 7.1.0 has introduced a conversion warning in template
definition context when a value-dependent sizeof is used as a template argument
for a class template. (There is no warning for something like
"f<sizeof(T)>()".) Note that the program below has no instantiation of "g", and
I believe a -Wconversion warning should not trigger when a constant value is
used that fits the target type.
g++ -Wconversion -c x.cc
x.cc: In function ‘int g(T)’:
x.cc:7:11: warning: conversion to ‘unsigned int’ from ‘long unsigned int’ may
alter its value [-Wconversion]
S<sizeof(T)> s;
template<unsigned int N>
struct S { };
template<class T>
void g(T)
{
S<sizeof(T)> s;
}
>From gcc-bugs-return-562392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 06:39:18 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 libfortran/80602] New: Reduce stack usage for blocked matmul
Date: Wed, 03 May 2017 06:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80602
Bug ID: 80602
Summary: Reduce stack usage for blocked matmul
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
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Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
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Since the introduction of blocked matmul, we unconditionally
allocate a 65536*sizeof(rtype) buffer on the stack, 0.5 MiB for
double precision.
We should try to reduce this; I have an idea.
>From gcc-bugs-return-562393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 06:40:53 2017
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80602
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-03
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-562394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 06:46:19 2017
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Subject: [Bug c/80468] [7 Regression] ICE on invalid AVX512 code with -m32
Date: Wed, 03 May 2017 06:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80468
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 3 06:45:29 2017
New Revision: 247534
URL: https://gcc.gnu.org/viewcvs?rev=247534&root=gcc&view=rev
Log:
Backported from mainline
2017-04-21 Jakub Jelinek <jakub@redhat.com>
PR c/80468
* c-decl.c (finish_declspecs) <case cts_int_n>: If int_n_idx is not
enabled, set specs->type to integer_type_node.
* gcc.dg/pr80468.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr80468.c
Modified:
branches/gcc-7-branch/gcc/c/ChangeLog
branches/gcc-7-branch/gcc/c/c-decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c/80468] [7 Regression] ICE on invalid AVX512 code with -m32
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed even for 7.2.
>From gcc-bugs-return-562396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:14:42 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 c++/80601] New: spurious -Wconversion warning with explicit class template arguments
Date: Wed, 03 May 2017 07:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80601
Bug ID: 80601
Summary: spurious -Wconversion warning with explicit class
template arguments
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
Target Milestone: ---
Keywords: diagnostic
The all-new gcc 7.1.0 has introduced a conversion warning in template
definition context when a value-dependent sizeof is used as a template argument
for a class template. (There is no warning for something like
"f<sizeof(T)>()".) Note that the program below has no instantiation of "g", and
I believe a -Wconversion warning should not trigger when a constant value is
used that fits the target type.
g++ -Wconversion -c x.cc
x.cc: In function ‘int g(T)’:
x.cc:7:11: warning: conversion to ‘unsigned int’ from ‘long unsigned int’ may
alter its value [-Wconversion]
S<sizeof(T)> s;
template<unsigned int N>
struct S { };
template<class T>
void g(T)
{
S<sizeof(T)> s;
}
>From gcc-bugs-return-562397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:17:30 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 07:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|netbsd |x86_64-netbsd
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Which DSO referenes it? __cpu_model is supposed to be defined in the
executable via the definition in libgcc.a.
This changed at some point so make sure to build the DSO and the application
with the same compiler.
>From gcc-bugs-return-562398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:18:24 2017
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Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Wed, 03 May 2017 07:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
CC| |hubicka at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|internal compiler error: in |[8 Regression] internal
|compute_inline_parameters, |compiler error: in
|at |compute_inline_parameters,
|ipa-inline-analysis.c:3126 |at
| |ipa-inline-analysis.c:3126
>From gcc-bugs-return-562399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:25:13 2017
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Subject: [Bug c++/80596] g++ generates incomplete DWARF debug information for array-typedefs
Date: Wed, 03 May 2017 07:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-debug
Known to work| |6.3.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It works for me on the GCC 6 branch but is still broken on the gcc 5 branch and
with GCC 6.3.0. I believe there's a duplicate bugreport for this, it looks
like
PR77363.
>From gcc-bugs-return-562400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:25:55 2017
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Subject: [Bug c++/80596] g++ generates incomplete DWARF debug information for array-typedefs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 77363 ***
>From gcc-bugs-return-562401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:25:57 2017
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Subject: [Bug c++/77363] [5 Regression] Missing debug information in DWARF
Date: Wed, 03 May 2017 07:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paul.kaletta at intel dot com
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80596 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-562402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:31:33 2017
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Subject: [Bug target/80464] [7/8 regression] S/390: ICE failed to split vector move
Date: Wed, 03 May 2017 07:32:00 -0000
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Fixed and backported to GCC 7 branch. Patch is included in GCC 7.1 release.
>From gcc-bugs-return-562403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 07:32:31 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 lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
Date: Wed, 03 May 2017 07:33:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #6)
> (In reply to Martin Liška from comment #4)
> > Remove LTO_STREAMER_DEBUG ([...]).
>
> Thanks! I'm fine with that -- but you do have verified that it's really
> just LTO_STREAMER_DEBUG that was broken, and not some lingering OMP/SIMD
> problem?
Yes, would be fixed by
https://github.com/marxin/gcc/commit/978c7e3436f91f3a1e94dfb63ba79e72b4f35715
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
Date: Wed, 03 May 2017 07:41:00 -0000
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Wed May 3 07:33:01 2017
New Revision: 247537
URL: https://gcc.gnu.org/viewcvs?rev=247537&root=gcc&view=rev
Log:
Replace absolute line numbers in c-c++-common
2017-05-03 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* c-c++-common/Wshift-negative-value-1.c: Replace absolute line
numbers.
* c-c++-common/Wshift-negative-value-2.c: Same.
* c-c++-common/Wshift-negative-value-3.c: Same.
* c-c++-common/Wshift-negative-value-4.c: Same.
* c-c++-common/cilk-plus/AN/pr57541.c: Same.
* c-c++-common/cpp/pr60400.c: Same.
* c-c++-common/fmax-errors.c: Same.
* c-c++-common/goacc/data-2.c: Same.
* c-c++-common/goacc/host_data-2.c: Same.
* c-c++-common/gomp/simd4.c: Same.
* c-c++-common/pr28656.c: Same.
* c-c++-common/pr43395.c: Same.
* c-c++-common/torture/pr57945.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wshift-negative-value-1.c
trunk/gcc/testsuite/c-c++-common/Wshift-negative-value-2.c
trunk/gcc/testsuite/c-c++-common/Wshift-negative-value-3.c
trunk/gcc/testsuite/c-c++-common/Wshift-negative-value-4.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541.c
trunk/gcc/testsuite/c-c++-common/cpp/pr60400.c
trunk/gcc/testsuite/c-c++-common/fmax-errors.c
trunk/gcc/testsuite/c-c++-common/goacc/data-2.c
trunk/gcc/testsuite/c-c++-common/goacc/host_data-2.c
trunk/gcc/testsuite/c-c++-common/gomp/simd4.c
trunk/gcc/testsuite/c-c++-common/pr28656.c
trunk/gcc/testsuite/c-c++-common/pr43395.c
trunk/gcc/testsuite/c-c++-common/torture/pr57945.c
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Subject: [Bug other/80573] ICE: internal compiler error: in assign_temp, at function.c:961
Date: Wed, 03 May 2017 07:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80573
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|avr |avr,x86_64
--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Also ICEc on x86_64 from trunk (v8) and v7:
ice.c: In function ‘fun’:
ice.c:5:5: internal compiler error: in assign_temp, at function.c:968
__asm volatile ("" : "+r" (cards));
^~~~~
0x872795 assign_temp(tree_node*, int, int)
../../../gcc.gnu.org/trunk/gcc/function.c:968
0x73f9d5 expand_asm_stmt
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:3036
0x74443f expand_gimple_stmt_1
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:3568
0x74443f expand_gimple_stmt
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:3737
0x7460a0 expand_gimple_basic_block
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:5744
0x74ad76 execute
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:6357
Using built-in specs.
COLLECT_GCC=gcc-8
Target: x86_64-pc-linux-gnu
Configured with: ../../gcc.gnu.org/trunk/configure
--prefix=/local/gnu/install/gcc-8-host --enable-languages=c,c++
--enable-checking=release --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170503 (experimental) [trunk revision 244001] (GCC)
COLLECT_GCC_OPTIONS='-S' '-v' '-mtune=generic' '-march=x86-64'
/srv/local/gnu/install/gcc-8-host/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1
-quiet -v -imultiarch x86_64-linux-gnu -iprefix
/srv/local/gnu/install/gcc-8-host/bin/../lib/gcc/x86_64-pc-linux-gnu/8.0.0/
ice.c -quiet -dumpbase ice.c -mtune=generic -march=x86-64 -auxbase ice -version
-o ice.s
GNU C11 (GCC) version 8.0.0 20170503 (experimental) [trunk revision 244001]
(x86_64-pc-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version isl-0.16.1-GMP
GNU C11 (GCC) version 8.0.0 20170503 (experimental) [trunk revision 244001]
(x86_64-pc-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version isl-0.16.1-GMP
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From: "EngyCZ at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80596] g++ generates incomplete DWARF debug information for array-typedefs
Date: Wed, 03 May 2017 07:50:00 -0000
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Jiřà Engelthaler <EngyCZ at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |EngyCZ at gmail dot com
--- Comment #3 from Jiřà Engelthaler <EngyCZ at gmail dot com> ---
(In reply to Richard Biener from comment #1)
> It works for me on the GCC 6 branch but is still broken on the gcc 5 branch
> and with GCC 6.3.0. I believe there's a duplicate bugreport for this, it
> looks like
> PR77363.
The patch (r239930) is included in 6.3.0 release (r243837)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/79472] [8 Regression] x86-64: Switch table generation fails if default case has different code
Date: Wed, 03 May 2017 07:54:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 3 07:49:43 2017
New Revision: 247538
URL: https://gcc.gnu.org/viewcvs?rev=247538&root=gcc&view=rev
Log:
PR tree-optimization/79472
* tree-switch-conversion.c (struct switch_conv_info): Add
contiguous_range and default_case_nonstandard fields.
(collect_switch_conv_info): Compute contiguous_range and
default_case_nonstandard fields, don't clear final_bb if
contiguous_range and only the default case doesn't have the required
structure.
(check_all_empty_except_final): Set default_case_nonstandard instead
of failing if contiguous_range and the default case doesn't have empty
block.
(check_final_bb): Add SWTCH argument, don't fail if contiguous_range
and only the default case doesn't have the required constants. Skip
virtual phis.
(gather_default_values): Skip virtual phis. Allow non-NULL CASE_LOW
if default_case_nonstandard.
(build_constructors): Build constant 1 just once. Assert that default
values aren't inserted in between cases if contiguous_range. Skip
virtual phis.
(build_arrays): Skip virtual phis.
(prune_bbs): Add DEFAULT_BB argument, don't remove that bb.
(fix_phi_nodes): Don't add e2f phi arg if default_case_nonstandard.
Handle virtual phis.
(gen_inbound_check): Handle default_case_nonstandard case.
(process_switch): Adjust check_final_bb caller. Call
gather_default_values with the first non-default case instead of
default case if default_case_nonstandard.
* gcc.dg/tree-ssa/vrp40.c: Add -fno-tree-switch-conversion to
dg-options.
* gcc.dg/tree-ssa/vrp113.c: New test.
* gcc.dg/tree-ssa/cswtch-3.c: New test.
* gcc.dg/tree-ssa/cswtch-4.c: New test.
* gcc.dg/tree-ssa/cswtch-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/cswtch-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/cswtch-4.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/cswtch-5.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp113.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp40.c
trunk/gcc/tree-switch-conversion.c
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Subject: [Bug other/80573] ICE: internal compiler error: in assign_temp, at function.c:961
Date: Wed, 03 May 2017 08:01:00 -0000
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--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Georg-Johann Lay from comment #1)
> Also ICEc on x86_64 from trunk (v8) and v7:
>
> ice.c: In function ‘fun’:
> ice.c:5:5: internal compiler error: in assign_temp, at function.c:968
FYI, the source line number differs from the one in v6.3, but the source still
reads:
rtx
assign_temp (tree type_or_decl, int memory_required,
int dont_promote ATTRIBUTE_UNUSED)
{
...
/* Allocating temporaries of TREE_ADDRESSABLE type must be done in the front
end. See also create_tmp_var for the gimplification-time check. */
gcc_assert (!TREE_ADDRESSABLE (type) && COMPLETE_TYPE_P (type));
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80603] New: Optimize loads from constant arrays or aggregates with arrays
Date: Wed, 03 May 2017 08:03:00 -0000
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Bug ID: 80603
Summary: Optimize loads from constant arrays or aggregates with
arrays
Product: gcc
Version: 8.0
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Priority: P3
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Created attachment 41301
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41301&action=edit
gcc8-cst-load.patch
The vrp113.c testcase (a copy of vrp40.c) is now XFAILed, because the switch
optimization does a better job on it, but we don't manage to figure out that no
matter what the index is we load always the same constant.
For integer loads, we can also figure ranges from those even if the constants
aren't the same, similarly for pointers (always NULL vs. always non-NULL vs.
anything).
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Wed, 03 May 2017 08:05:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started same as PR80581 with r247455. However the assert is
triggered on a different location:
Breakpoint 1, compute_inline_parameters (node=0x7ffff4d11e60, early=true) at
../../gcc/ipa-inline-analysis.c:3125
3125 gcc_assert (!(info->time - info->self_time).to_int ()
(gdb) p info->time
$1 = {m_sig = 1316130052, m_exp = -10}
(gdb) p info->time.to_int()
$2 = 1285283
(gdb) p info->self_time.to_int()
$3 = 1285282
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Subject: [Bug tree-optimization/79472] [8 Regression] x86-64: Switch table generation fails if default case has different code
Date: Wed, 03 May 2017 08:10:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8+.
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 08:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80600
--- Comment #3 from coypu <coypu at sdf dot org> ---
$ /usr/pkg/gcc7/bin/gfortran -Wl,--verbose test.f95 |grep succeeded |sort -u
..
attempt to open /usr/lib/crt0.o succeeded
attempt to open /usr/lib/crtbegin.o succeeded
attempt to open /usr/lib/crtend.o succeeded
attempt to open /usr/lib/crti.o succeeded
attempt to open /usr/lib/crtn.o succeeded
attempt to open /usr/lib/libc.so succeeded
attempt to open /usr/lib/libm.so succeeded
attempt to open /usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/../../../libgcc_s.so
succeeded
attempt to open
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/../../../libgfortran.so succeeded
attempt to open
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/../../../libquadmath.so succeeded
attempt to open /usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/libgcc.a succeeded
attempt to open /var/tmp//ccCfh5i1.o succeeded
if I 'nm library | grep cpu_model' I get:
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/../../../libgcc_s.so:
0000000000214540 b __cpu_model
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/../../../libgfortran.so:
U __cpu_model
/usr/pkg/gcc7/lib/gcc/x86_64--netbsd/7.1.0/libgcc.a:
0000000000000000 B __cpu_model
I got everything (all those) under /usr/pkg/gcc7 from building GCC 7.1.0, it's
possible I built it wrong
I hope this is the right information
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
Date: Wed, 03 May 2017 08:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80561
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 2 May 2017, glisse at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80561
>
> --- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
> Cool, that matches pretty much exactly the analysis I had posted on
> stackoverflow ;-)
>
> A separate issue from whether we can somehow propagate the alignment
> information is what we do without the alignment information (remove the
> attribute to be sure). Gcc generates a rather large code, with scalar and
> vector loops, to try and reach an aligned position for one of the buffers (the
> other one still requires potentially unaligned access) and perform at most 2
> vector iterations. On the other hand, clang+llvm don't care about alignment and
> generate unaligned vector operations, totally unrolled (that's 2 vector
> iterations since there were 8 scalar iterations initially), for a grand total
> of 6 insns (with AVX). I have a hard time believing that gcc's complicated code
> is ever faster than clang's, whether the arrays are aligned or not. We can
> discuss that in a separate PR if this one should center on alignment.
The alignment peeling cost-model is somewhat simplistic but in this case
where we end up with two aligned refs we get
.L6:
vmovupd (%rcx,%rax), %xmm0
addl $1, %r8d
vinsertf128 $0x1, 16(%rcx,%rax), %ymm0, %ymm0
vaddpd (%r9,%rax), %ymm0, %ymm0
vmovapd %ymm0, (%r9,%rax)
addq $32, %rax
cmpl %r10d, %r8d
jb .L6
vs.
.L4:
vmovupd (%rsi,%rax), %xmm1
addl $1, %ecx
vmovupd (%rdi,%rax), %xmm0
vinsertf128 $0x1, 16(%rsi,%rax), %ymm1, %ymm1
vinsertf128 $0x1, 16(%rdi,%rax), %ymm0, %ymm0
vaddpd %ymm1, %ymm0, %ymm0
vmovups %xmm0, (%rdi,%rax)
vextractf128 $0x1, %ymm0, 16(%rdi,%rax)
addq $32, %rax
cmpl %r8d, %ecx
jb .L4
with -mavx2 (and the generic tuning of splitting unaligned ymm
loads/stores). I'm sure a microbench would show that makes
a difference. With -mtune=intel less so I guess -- but then
the generic vectorizer cost model somewhat reflects this with
vec_unalign_load_cost of 2 and vec_align_load_cost of 1
(surprisingly there's no vec_unalgined_store_cost but it's the same as
the unaligned load one in the x86 backend...).
This should probably depend on the vector size to reflect
the splitting cost for avx sized vectors.
That is, the backend (genernic) cost model currently is too simplistic.
There's not a single tuning apart from -Os that has unaligned loads
costed the same as aligned ones.
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Subject: [Bug tree-optimization/80603] Optimize loads from constant arrays or aggregates with arrays
Date: Wed, 03 May 2017 08:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-03
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-562415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 08:43:00 2017
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Subject: [Bug c++/80604] New: internal compiler error: Internal compiler error in tsubst_decl, at cp/pt.c:11749
Date: Wed, 03 May 2017 08:44:00 -0000
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Bug ID: 80604
Summary: internal compiler error: Internal compiler error in
tsubst_decl, at cp/pt.c:11749
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
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Created attachment 41302
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41302&action=edit
the preprocessed file (*.i*) that triggers the bug
g++ -v -save-temps -s -std=c++1z -pedantic -Wall -Wextra -O3
-fomit-frame-pointer -lSDL main.cpp
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 6.3.0-12ubuntu2'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 6.3.0 20170406 (Ubuntu 6.3.0-12ubuntu2)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-s' '-std=c++1z' '-Wpedantic' '-Wall'
'-Wextra' '-O3' '-fomit-frame-pointer' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE main.cpp -mtune=generic -march=x86-64 -std=c++1z
-Wpedantic -Wall -Wextra -fomit-frame-pointer -O3 -fpch-preprocess
-fstack-protector-strong -Wformat-security -o main.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/6"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/6/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/6
/usr/include/x86_64-linux-gnu/c++/6
/usr/include/c++/6/backward
/usr/lib/gcc/x86_64-linux-gnu/6/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/6/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-s' '-std=c++1z' '-Wpedantic' '-Wall'
'-Wextra' '-O3' '-fomit-frame-pointer' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -O3 -Wpedantic
-Wall -Wextra -std=c++1z -version -fomit-frame-pointer -fstack-protector-strong
-Wformat-security -o main.s
GNU C++14 (Ubuntu 6.3.0-12ubuntu2) version 6.3.0 20170406 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170406, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 6.3.0-12ubuntu2) version 6.3.0 20170406 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170406, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: fe2487a76953e518567d9823ca085b0d
main.cpp: In instantiation of ‘display()::<lambda(const Point2D&, const
auto:1&, auto:2&, auto:3&)> [with auto:1 = double; auto:2 = buffer<float>;
auto:3 = buffer<unsigned int>]’:
main.cpp:216:4: required from ‘auto drawTri(const Point2D&, const Point2D&,
const Point2D&, const T&, const T&, const T&, const F&, Buf&, Bufs& ...) [with
T = float; F = display()::<lambda(const Point2D&, const auto:1&, auto:2&,
auto:3&)>; Buf = buffer<float>; Bufs = {buffer<unsigned int>}]’
main.cpp:268:31: required from here
main.cpp:228:6: internal compiler error: in tsubst_decl, at cp/pt.c:11749
auto display() noexcept {
^~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
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Subject: [Bug c++/80605] New: Bad is_standard_layout result with empty base classes
Date: Wed, 03 May 2017 08:48:00 -0000
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Bug ID: 80605
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gcc 7.1.0 prints False for the following program. gcc 6.3.0 and others print
True.
// $CXX -std=c++14 -o stdlayout stdlayout.C
#include <iostream>
struct BaseBase {};
struct Base: BaseBase {};
struct Type: public Base { int x; };
int main()
{
std::cout << std::boolalpha << std::is_standard_layout<Type>::value <<
'\n';
}
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Subject: [Bug testsuite/80606] New: avx-vtestpd-1.c contains outdated line number
Date: Wed, 03 May 2017 08:49:00 -0000
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Bug ID: 80606
Summary: avx-vtestpd-1.c contains outdated line number
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gcc/testsuite/gcc.target/i386/avx-vtestpd-1.c contains a reference to a line
number 164:
...
/* { dg-do run } */
/* { dg-require-effective-target avx } */
/* { dg-options "-O2 -mavx -DNEED_IEEE754_DOUBLE" } */
/* { dg-warning "attribute ignored" "" { target default_packed } 164 } */
/* { dg-message " from " "include chain" { target default_packed } 0 } */
#include "avx-check.h"
...
From the patch posting here (
https://gcc.gnu.org/ml/gcc-patches/2009-07/msg01303.html ) I understand that
the line number is related to two ieee754 unions with packed attribute in
m128-check.h.
Looking at m128-check.h we see that neither of the unions is at line 164:
...
161 } \
162 return err; \
163 }
164
165 CHECK_FP_ARRAY (d, double, ESP_DOUBLE, "%f")
166 CHECK_FP_ARRAY (f, float, ESP_FLOAT, "%f")
167
168 #ifdef NEED_IEEE754_FLOAT
169 union ieee754_float
170 {
171 float d;
172 struct
173 {
174 unsigned long frac : 23;
175 unsigned exp : 8;
176 unsigned sign : 1;
177 } bits __attribute__((packed));
178 };
179 #endif
180
181 #ifdef NEED_IEEE754_DOUBLE
182 union ieee754_double
183 {
184 double d;
185 struct
186 {
187 unsigned long frac1 : 32;
188 unsigned long frac0 : 20;
189 unsigned exp : 11;
190 unsigned sign : 1;
191 } bits __attribute__((packed));
192 };
193 #endif
...
I suspect that since netware support was removed in 2011, the
default_packed-guarded directives have not been run, which allowed the line
numbers of the unions to change silently.
Perhaps we should revert the patch.
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Subject: [Bug c++/80605] Bad is_standard_layout result with empty base classes
Date: Wed, 03 May 2017 09:00:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
C++14 did change the StandardLayoutType a little bit in this area.
>From gcc-bugs-return-562419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 09:00:56 2017
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
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--- Comment #8 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Thanks for confirming, and sorry for the extra work that you did. :-/
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80520] [7/8 Regression] Performance regression from missing if-conversion
Date: Wed, 03 May 2017 09:24:00 -0000
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--- Comment #5 from krister.walfridsson at gmail dot com ---
I have extracted a smaller test case. The loops are generated from
typedef mersenne_twister_engine<
uint_fast32_t,
32, 624, 397, 31,
0x9908b0dfUL, 11,
0xffffffffUL, 7,
0x9d2c5680UL, 15,
0xefc60000UL, 18, 1812433253UL> mt19937;
and the expansion of the template end up with loops like
void foo(unsigned long *M)
{
for (unsigned long k = 0; k < 227; ++k)
{
unsigned long y =
((M[k] & 0xffffffff80000000) | (M[k + 1] & 0x7fffffff));
M[k] = (M[k + 397] ^ (y >> 1) ^ ((y & 1) ? 2567483615 : 0));
}
}
which generates the dump described in the bug report.
--- Comment #6 from krister.walfridsson at gmail dot com ---
I have extracted a smaller test case. The loops are generated from
typedef mersenne_twister_engine<
uint_fast32_t,
32, 624, 397, 31,
0x9908b0dfUL, 11,
0xffffffffUL, 7,
0x9d2c5680UL, 15,
0xefc60000UL, 18, 1812433253UL> mt19937;
and the expansion of the template end up with loops like
void foo(unsigned long *M)
{
for (unsigned long k = 0; k < 227; ++k)
{
unsigned long y =
((M[k] & 0xffffffff80000000) | (M[k + 1] & 0x7fffffff));
M[k] = (M[k + 397] ^ (y >> 1) ^ ((y & 1) ? 2567483615 : 0));
}
}
which generates the dump described in the bug report.
>From gcc-bugs-return-562420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 09:12:14 2017
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--- Comment #14 from Rolf Eike Beer <eike@sf-mail.de> ---
Still broken in 7.1.0.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80520] [7/8 Regression] Performance regression from missing if-conversion
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--- Comment #5 from krister.walfridsson at gmail dot com ---
I have extracted a smaller test case. The loops are generated from
typedef mersenne_twister_engine<
uint_fast32_t,
32, 624, 397, 31,
0x9908b0dfUL, 11,
0xffffffffUL, 7,
0x9d2c5680UL, 15,
0xefc60000UL, 18, 1812433253UL> mt19937;
and the expansion of the template end up with loops like
void foo(unsigned long *M)
{
for (unsigned long k = 0; k < 227; ++k)
{
unsigned long y =
((M[k] & 0xffffffff80000000) | (M[k + 1] & 0x7fffffff));
M[k] = (M[k + 397] ^ (y >> 1) ^ ((y & 1) ? 2567483615 : 0));
}
}
which generates the dump described in the bug report.
--- Comment #6 from krister.walfridsson at gmail dot com ---
I have extracted a smaller test case. The loops are generated from
typedef mersenne_twister_engine<
uint_fast32_t,
32, 624, 397, 31,
0x9908b0dfUL, 11,
0xffffffffUL, 7,
0x9d2c5680UL, 15,
0xefc60000UL, 18, 1812433253UL> mt19937;
and the expansion of the template end up with loops like
void foo(unsigned long *M)
{
for (unsigned long k = 0; k < 227; ++k)
{
unsigned long y =
((M[k] & 0xffffffff80000000) | (M[k + 1] & 0x7fffffff));
M[k] = (M[k + 397] ^ (y >> 1) ^ ((y & 1) ? 2567483615 : 0));
}
}
which generates the dump described in the bug report.
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #8)
> Thanks for confirming, and sorry for the extra work that you did. :-/
No problem ;)
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl at gcc dot gnu.org,
| |kristerw at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, so the change made for PR65612 was
Index: libgcc/config.host
===================================================================
--- libgcc/config.host (revision 222177)
+++ libgcc/config.host (revision 222178)
@@ -1306,7 +1306,7 @@ i[34567]86-*-linux* | x86_64-*-linux* |
i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
i[34567]86-*-knetbsd*-gnu | \
i[34567]86-*-gnu*)
- tmake_file="${tmake_file} t-tls i386/t-linux"
+ tmake_file="${tmake_file} t-tls i386/t-linux t-slibgcc-libgcc"
if test "$libgcc_cv_cfi" = "yes"; then
tmake_file="${tmake_file} t-stack i386/t-stack-i386"
fi
but that doesn't include
x86_64-*-netbsd*)
tmake_file="${tmake_file} i386/t-crtstuff"
;;
CCing author of change and netbsd maintainer.
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P2
Target Milestone|--- |7.2
Summary|Bad is_standard_layout |[7/8 Regression] Bad
|result with empty base |is_standard_layout result
|classes |with empty base classes
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Let's mark it appropriately to get some attention and clarification.
>From gcc-bugs-return-562426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:05:19 2017
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Subject: [Bug c++/80601] spurious -Wconversion warning with explicit class template arguments
Date: Wed, 03 May 2017 10:17:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I suspect this is another consequence of
https://gcc.gnu.org/gcc-7/porting_to.html#hypothetical-instantiation
Strictly speaking the compiler is correct that the type of sizeof(T) is not
dependent, so for LP64 targets will always need a conversion to a narrower
type.
But the warning does seem unhelpful in this case, as it's almost certain that
any instantiation of the function template will produce a value that does fit
in unsigned.
>From gcc-bugs-return-562427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:17:18 2017
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
Date: Wed, 03 May 2017 10:18:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to lloda from comment #0)
> gcc 7.1.0 prints False for the following program. gcc 6.3.0 and others print
> True.
>
> // $CXX -std=c++14 -o stdlayout stdlayout.C
Are you sure about that? I can only reproduce this with -std=c++17
(So it's probably due to the changes to the definition of aggregates in C++17)
>From gcc-bugs-return-562428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:18:24 2017
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Subject: [Bug driver/31468] Calling gcc with empty output filename can remove crt0.o (crt1.o on linux)
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, huh, it's very old issue. I've got patch for that.
>From gcc-bugs-return-562429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:21:32 2017
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> (So it's probably due to the changes to the definition of aggregates in
> C++17)
Which would still be a regression. I'm bisecting ...
>From gcc-bugs-return-562430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:23:15 2017
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From: "lloda at bluewin dot ch" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
Date: Wed, 03 May 2017 10:26:00 -0000
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--- Comment #5 from lloda at bluewin dot ch ---
(In reply to Jonathan Wakely from comment #3)
> (In reply to lloda from comment #0)
> > gcc 7.1.0 prints False for the following program. gcc 6.3.0 and others print
> > True.
> >
> > // $CXX -std=c++14 -o stdlayout stdlayout.C
>
> Are you sure about that? I can only reproduce this with -std=c++17
>
> (So it's probably due to the changes to the definition of aggregates in
> C++17)
You're right, I was actually trying with c++1z. Apologies. It does work with
c++14.
>From gcc-bugs-return-562431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:26:26 2017
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r241187 is where it started to give False with -std=c++17.
>From gcc-bugs-return-562432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:31:07 2017
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Subject: [Bug gcov-profile/45582] gcda file names collision when profiling
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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> ---
Confirmed, it's really a limitation.
>From gcc-bugs-return-562433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:36:07 2017
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Subject: [Bug driver/45163] -save-temps=obj does not work correctly with -fdum-tree- options
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-562434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:41:07 2017
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Subject: [Bug driver/34942] -frepo only works with C locale
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34942
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
LANG=es_UY g++ pr34942.c -c -frepo
works fine for me.
>From gcc-bugs-return-562435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:43:31 2017
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
Date: Wed, 03 May 2017 10:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
check_bases does:
/* ...either has no non-static data members in the most-derived
class and at most one base class with non-static data
members, or has no base classes with non-static data
members */
for (basefield = TYPE_FIELDS (basetype); basefield;
basefield = DECL_CHAIN (basefield))
if (TREE_CODE (basefield) == FIELD_DECL)
{
if (field)
CLASSTYPE_NON_STD_LAYOUT (t) = 1;
else
field = basefield;
break;
}
and we hit this with field being x and basefield being the artificial
FIELD_DECL created from:
4615 /* We used to not create a FIELD_DECL for empty base classes
because of
4616 back end issues with overlapping FIELD_DECLs, but that doesn't
seem to
4617 be a problem anymore. We need them to handle initialization
of C++17
4618 aggregate bases. */
4619 if (cxx_dialect >= cxx1z && !BINFO_VIRTUAL_P (binfo))
4620 {
4621 tree decl = build_base_field_1 (t, basetype, next_field);
4622 DECL_FIELD_OFFSET (decl) = BINFO_OFFSET (binfo);
4623 DECL_FIELD_BIT_OFFSET (decl) = bitsize_zero_node;
4624 SET_DECL_OFFSET_ALIGN (decl, BITS_PER_UNIT);
4625 }
So, do we need to ignore those artificial FIELD_DECLs in the
CLASSTYPE_NON_STD_LAYOUT computation? Do we have some way how to identify the
FIELD_DECLs created in this case?
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Subject: [Bug driver/31071] A discrepancy in handling %{...} and %W{...} in function do_spec_1
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-562437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 10:47:30 2017
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Subject: [Bug ipa/53896] nonreturning function suggested as 'pure' candidate
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I'll fix that.
>From gcc-bugs-return-562438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 11:00:04 2017
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Subject: [Bug tree-optimization/80492] [5/6/7 Regression] Wrong code when unrolling a loop with inline asm and local regs
Date: Wed, 03 May 2017 11:03:00 -0000
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 3 10:59:25 2017
New Revision: 247543
URL: https://gcc.gnu.org/viewcvs?rev=247543&root=gcc&view=rev
Log:
2017-05-03 Richard Biener <rguenther@suse.de>
Revert
PR tree-optimization/80492
* tree-ssa-alias.c (decl_refs_may_alias_p): Handle
compare_base_decls returning dont-know properly.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-alias.c
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80607] New: [8 Regression] nvptx offload compiler fails to build
Date: Wed, 03 May 2017 11:09:00 -0000
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Bug ID: 80607
Summary: [8 Regression] nvptx offload compiler fails to build
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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seen with trunk 20170502, configured as
--with-gcc-major-version-only --disable-bootstrap --disable-sjlj-exceptions
--enable-newlib-io-long-long --target nvptx-none
--enable-as-accelerator-for=x86_64-linux-gnu
--enable-languages=c,c++,fortran,lto --enable-checking=release
--with-system-zlib --without-isl --program-prefix=nvptx-none-
/<<PKGBUILDDIR>>/build/gcc/xg++ -B/<<PKGBUILDDIR>>/build/gcc/
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libatomic/.libs
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/include
-I/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/include/x86_64-linux-gnu
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libatomic/.libs
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/libsupc++/.libs -fno-PIE
-c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -O2 -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-I. -Ic-family -I../../src/gcc -I../../src/gcc/c-family
-I../../src/gcc/../include -I../../src/gcc/../libcpp/include
-I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../src/gcc/../libbacktrace -o c-family/cilk.o -MT
c-family/cilk.o -MMD -MP -MF c-family/.deps/cilk.TPo
../../src/gcc/c-family/cilk.c
In file included from ../../src/gcc/c-family/c-common.h:26:0,
from ../../src/gcc/c-family/cilk.c:28:
../../src/gcc/c-family/cilk.c: In function 'bool
cilk_set_spawn_marker(location_t, tree)':
../../src/gcc/tree.h:900:4: error: 'tree_check2' was not declared in this scope
(tree_check2 (NODE, __FILE__, __LINE__, __FUNCTION__, \
^
../../src/gcc/c-family/cilk.c:113:9: note: in expansion of macro
'EXPR_CILK_SPAWN'
EXPR_CILK_SPAWN (fcall) = 1;
^~~~~~~~~~~~~~~
../../src/gcc/tree.h:900:4: note: suggested alternative: 'tree_block'
(tree_check2 (NODE, __FILE__, __LINE__, __FUNCTION__, \
^
../../src/gcc/c-family/cilk.c:113:9: note: in expansion of macro
'EXPR_CILK_SPAWN'
EXPR_CILK_SPAWN (fcall) = 1;
^~~~~~~~~~~~~~~
../../src/gcc/tree.h:900:4: error: 'tree_check2' was not declared in this scope
(tree_check2 (NODE, __FILE__, __LINE__, __FUNCTION__, \
^
../../src/gcc/c-family/cilk.c:115:9: note: in expansion of macro
'EXPR_CILK_SPAWN'
EXPR_CILK_SPAWN (TREE_OPERAND (fcall, 1)) = 1;
^~~~~~~~~~~~~~~
../../src/gcc/tree.h:900:4: note: suggested alternative: 'tree_block'
(tree_check2 (NODE, __FILE__, __LINE__, __FUNCTION__, \
^
../../src/gcc/c-family/cilk.c:115:9: note: in expansion of macro
'EXPR_CILK_SPAWN'
EXPR_CILK_SPAWN (TREE_OPERAND (fcall, 1)) = 1;
^~~~~~~~~~~~~~~
/<<PKGBUILDDIR>>/build/gcc/xg++ -B/<<PKGBUILDDIR>>/build/gcc/
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libatomic/.libs
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/include
-I/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/include/x86_64-linux-gnu
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libatomic/.libs
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libstdc++-v3/libsupc++/.libs -fno-PIE
-c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -O2 -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-I. -Ic-family -I../../src/gcc -I../../src/gcc/c-family
-I../../src/gcc/../include -I../../src/gcc/../libcpp/include
-I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../src/gcc/../libbacktrace -o c-family/c-ubsan.o -MT
c-family/c-ubsan.o -MMD -MP -MF c-family/.deps/c-ubsan.TPo
../../src/gcc/c-family/c-ubsan.c
Makefile:1101: recipe for target 'c-family/cilk.o' failed
make[4]: *** [c-family/cilk.o] Error 1
make[4]: *** Waiting for unfinished jobs....
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Subject: [Bug middle-end/80539] [5/6 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80539
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 3 11:22:34 2017
New Revision: 247545
URL: https://gcc.gnu.org/viewcvs?rev=247545&root=gcc&view=rev
Log:
2017-05-03 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80453
* tree-ssa-sccvn.h (struct vn_phi_s): Add cclhs and ccrhs members.
* tree-ssa-sccvn.c (cond_stmts_equal_p): Use recorded lhs and rhs
from the conditions.
(vn_phi_eq): Pass them down.
(vn_phi_lookup): Record them.
(vn_phi_insert): Likewise.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/alias.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-chrec.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.h
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/80453] [6/7 Regression] another compare-debug failure
Date: Wed, 03 May 2017 11:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80453
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 3 11:22:34 2017
New Revision: 247545
URL: https://gcc.gnu.org/viewcvs?rev=247545&root=gcc&view=rev
Log:
2017-05-03 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80453
* tree-ssa-sccvn.h (struct vn_phi_s): Add cclhs and ccrhs members.
* tree-ssa-sccvn.c (cond_stmts_equal_p): Use recorded lhs and rhs
from the conditions.
(vn_phi_eq): Pass them down.
(vn_phi_lookup): Record them.
(vn_phi_insert): Likewise.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/alias.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-chrec.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.h
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80608] New: [8 Regression] trunk 20170502 fails to build on hppa-linux-gnu
Date: Wed, 03 May 2017 11:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80608
Bug ID: 80608
Summary: [8 Regression] trunk 20170502 fails to build on
hppa-linux-gnu
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
seen with trunk 20170502,
../../src/gcc/fold-const.c: In function 'tree_node* fold_binary_loc(location_t,
tree_code, tree, tree, tree)':
../../src/gcc/fold-const.c:11217:1: internal compiler error: Floating point
exception
}
^
0x153a8a3 crash_signal
../../src/gcc/toplev.c:337
Please submit a full bug report,
with preprocessed source if appropriate.
make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/gcc'
Makefile:4619: recipe for target 'all-stage2-gcc' failed
make[4]: *** [all-stage2-gcc] Error 2
make[4]: Leaving directory '/<<PKGBUILDDIR>>/build'
Makefile:21213: recipe for target 'stage2-bubble' failed
make[3]: *** [stage2-bubble] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>/build'
Makefile:21416: recipe for target 'bootstrap' failed
make[2]: *** [bootstrap] Error 2
complete build log at
https://buildd.debian.org/status/fetch.php?pkg=gcc-snapshot&arch=hppa&ver=20170502-1&stamp=1493786041&raw=0
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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/80492] [5/6/7 Regression] Wrong code when unrolling a loop with inline asm and local regs
Date: Wed, 03 May 2017 12:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80492
--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 3 11:22:34 2017
New Revision: 247545
URL: https://gcc.gnu.org/viewcvs?rev=247545&root=gcc&view=rev
Log:
2017-05-03 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80453
* tree-ssa-sccvn.h (struct vn_phi_s): Add cclhs and ccrhs members.
* tree-ssa-sccvn.c (cond_stmts_equal_p): Use recorded lhs and rhs
from the conditions.
(vn_phi_eq): Pass them down.
(vn_phi_lookup): Record them.
(vn_phi_insert): Likewise.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/alias.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-chrec.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.c
branches/gcc-7-branch/gcc/tree-ssa-sccvn.h
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80607] [8 Regression] nvptx offload compiler fails to build
Date: Wed, 03 May 2017 12:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This has been fixed.
2017-05-02 Xi Ruoyao <ryxi@stu.xidian.edu.cn>
* tree.h (EXPR_CILK_SPAWN): Use macro TREE_CHECK2 instead of
function tree_check2.
>From gcc-bugs-return-562446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 12:14:22 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 c++/70844] [6/7/8 Regression] spurious -Wuseless-cast warning with inherited constructors
Date: Wed, 03 May 2017 12:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.4
>From gcc-bugs-return-562445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 12:13:33 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 target/80608] [8 Regression] trunk 20170502 fails to build on hppa-linux-gnu
Date: Wed, 03 May 2017 12:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-03
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you provide preprocessed source so this can be reproduced with a cross?
>From gcc-bugs-return-562447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 12:14:57 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/70936] [6/7/8 Regression] Hard-coded C++ header paths and relocation problem
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.4
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Subject: [Bug fortran/80555] [5/6/7/8 Regression] ICE when using MAXVAL of a rank-2 PARAMETER array in a module
Date: Wed, 03 May 2017 12:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/62045] [5 Regression] __gnu_pbds::priority_queue<int, less<int>, binary_heap_tag> is too slow
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/80543] [5 Regression] ICE in tsubst_copy, at cp/pt.c:13039
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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-562451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 12:20:56 2017
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80609] New: crash_signal in reset_inline_summary on ia64 bootstrap
Date: Wed, 03 May 2017 12:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80609
Bug ID: 80609
Summary: crash_signal in reset_inline_summary on ia64 bootstrap
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
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Bootstrap on ia64 just got this:
0x40000000017dc5ff crash_signal
/gcc/spec/sb-terbium-head-64/gcc/gcc/toplev.c:337
0x40000000008c7570 base_pool_allocator<memory_block_pool>::remove(void*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/alloc-pool.h:450
0x4000000000fe994f object_allocator<predicate>::remove(predicate*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/alloc-pool.h:520
0x4000000000faceaf reset_inline_summary
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:1108
0x4000000000fd744f compute_inline_parameters(cgraph_node*, bool)
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:3028
0x4000000000fd900f compute_inline_parameters_for_current
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:3137
0x4000000000ff0bbf (anonymous
namespace)::pass_inline_parameters::execute(function*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:3167
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[3]: *** [_gcov.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory
`/gcc/spec/sb-terbium-head-64/ia64/build/ia64-unknown-linux-gnu/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
Configured with:
/gcc/spec/sb-terbium-head-64/gcc/configure
--prefix=/gcc/spec/sb-terbium-head-64/ia64/install-201705031104
--enable-languages=c,c++,fortran --enable-threads=posix --disable-nls
--enable-__cxa_atexit --enable-clocale=gn
u --enable-checking=release --disable-libstdcxx-pch --disable-libsanitizer
--disable-libcilkrts --without-isl
svn revision 247544. I'll attach a preprocessed file once I get it.
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Subject: [Bug ipa/80609] crash_signal in reset_inline_summary on ia64 bootstrap
Date: Wed, 03 May 2017 12:29:00 -0000
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Michael Matz <matz at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #1 from Michael Matz <matz at gcc dot gnu.org> ---
IPA crash, hence CCing Honza.
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Subject: [Bug target/80608] [8 Regression] trunk 20170502 fails to build on hppa-linux-gnu
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John David Anglin <danglin at gcc dot gnu.org> changed:
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Duplicate. Bug is probably in ppl.
*** This bug has been marked as a duplicate of bug 79027 ***
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Subject: [Bug c/79027] fold-const.c:11104:1: internal compiler error: Floating point exception
Date: Wed, 03 May 2017 12:33:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
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CC| |doko at gcc dot gnu.org
--- Comment #7 from John David Anglin <danglin at gcc dot gnu.org> ---
*** Bug 80608 has been marked as a duplicate of this bug. ***
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/80609] crash_signal in reset_inline_summary on ia64 bootstrap
Date: Wed, 03 May 2017 13:14:00 -0000
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--- Comment #2 from Michael Matz <matz at gcc dot gnu.org> ---
Created attachment 41303
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41303&action=edit
preprocessed file
% ./gcc/cc1 -fpreprocessed libgcov-driver.i -quiet -dumpbase libgcov-driver.i
-auxbase-strip _gcov.o -g -g -O2 -O2 -Wextra -Wall -Wwrite-strings -Wcast-qual
-Wformat=0 -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-version -fbuilding-libgcc -fno-stack-protector -fPIC
/gcc/spec/sb-terbium-head-64/gcc/libgcc/libgcov-driver.c: In function
'merge_summary.isra.2':
/gcc/spec/sb-terbium-head-64/gcc/libgcc/libgcov-driver.c:923:1: internal
compiler error: Segmentation fault
}
^
0x40000000017dc5ff crash_signal
/gcc/spec/sb-terbium-head-64/gcc/gcc/toplev.c:337
0x40000000008c7570 base_pool_allocator<memory_block_pool>::remove(void*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/alloc-pool.h:450
0x4000000000fe994f object_allocator<predicate>::remove(predicate*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/alloc-pool.h:520
0x4000000000faceaf reset_inline_summary
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:1108
0x4000000000fd744f compute_inline_parameters(cgraph_node*, bool)
/gcc/spec/sb-terbium-head-64/gcc/gcc/ipa-inline-analysis.c:3028
0x4000000001b564df convert_callers_for_node
/gcc/spec/sb-terbium-head-64/gcc/gcc/tree-sra.c:5194
0x400000000085e61f cgraph_node::call_for_symbol_and_aliases(bool
(*)(cgraph_node*, void*), void*, bool)
/gcc/spec/sb-terbium-head-64/gcc/gcc/cgraph.h:3150
0x4000000001b55a2f convert_callers
/gcc/spec/sb-terbium-head-64/gcc/gcc/tree-sra.c:5209
0x4000000001b5a5cf modify_function
/gcc/spec/sb-terbium-head-64/gcc/gcc/tree-sra.c:5265
0x4000000001b5acff ipa_early_sra
/gcc/spec/sb-terbium-head-64/gcc/gcc/tree-sra.c:5493
0x4000000001b7465f (anonymous
namespace)::pass_early_ipa_sra::execute(function*)
/gcc/spec/sb-terbium-head-64/gcc/gcc/tree-sra.c:5540
>From gcc-bugs-return-562456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 13:14:50 2017
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From: "gustavo.hime at mpimet dot mpg.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80610] New: Compiler crashes ungraciously when large static array is initialized with anything other than zero
Date: Wed, 03 May 2017 13:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80610
Bug ID: 80610
Summary: Compiler crashes ungraciously when large static array
is initialized with anything other than zero
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gustavo.hime at mpimet dot mpg.de
Target Milestone: ---
Created attachment 41304
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41304&action=edit
bug_static_array.f90
Please compile the code snippet with "gfortran -c -finit-real=nan
bug_static_array.f90" or any other value for -finit-real different from zero.
Local installations of version 5.2.0, 5.4.0 and 6.2.0 hang a while and then
crash with the message:
virtual memory exhausted: Cannot allocate memory
The code there is just to prevent things from being optimized out. The bug is
related to the size of the array. The code may be unrealistic, but I was victim
of a typo. Took me a while to pin down the source.
>From gcc-bugs-return-562457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 13:59:24 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 ipa/80609] [8 Regression] crash_signal in reset_inline_summary on ia64 bootstrap
Date: Wed, 03 May 2017 14:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |ia64-*-*
Version|unknown |8.0
Target Milestone|--- |8.0
Summary|crash_signal in |[8 Regression] crash_signal
|reset_inline_summary on |in reset_inline_summary on
|ia64 bootstrap |ia64 bootstrap
>From gcc-bugs-return-562458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 14:23:27 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80558] VRP not handling x & -2 well
Date: Wed, 03 May 2017 14:36:00 -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 41305
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41305&action=edit
gcc8-pr80558.patch
Untested fix.
>From gcc-bugs-return-562459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 14:36:12 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80611] New: [8 regression] test case gfortran.dg/coarray_lock_7.f90 fails starting with r247495
Date: Wed, 03 May 2017 14:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80611
Bug ID: 80611
Summary: [8 regression] test case
gfortran.dg/coarray_lock_7.f90 fails starting with
r247495
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
spawn /home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../gfortran
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/coarray_lock_7.f90
-fno-diagnostics-show-caret -fdiagnostics-color=never -O -fdump-tree-original
-fcoarray=lib -S -o coarray_lock_7.s
PASS: gfortran.dg/coarray_lock_7.f90 -O (test for excess errors)
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_register \\(1, 2, \\(void \\* \\*\\) &caf_token.., \\(void
\\*\\) &desc.., 0B, 0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_register \\(25, 2, \\(void \\* \\*\\) &caf_token.., \\(void
\\*\\) &desc.., 0B, 0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_register \\(1, 3, &three.token, \\(void \\*\\) &three, &stat..,
0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_register \\(7, 3, &four.token, \\(void \\*\\) &four, &stat..,
0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_lock \\(caf_token.., 0, 0, 0B, 0B, 0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_unlock \\(caf_token.., 0, 0, 0B, 0B, 0\\);" 1
FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_lock \\(caf_token.., \\(3 - \\(integer\\(kind=4\\)\\)
parm...dim\\[0\\].lbound\\) \\+ \\(integer\\(kind=4\\)\\) MAX_EXPR
<\\(parm...dim\\[0\\].ubound - parm...dim\\[0\\].lbound\\) \\+ 1, 0> \\* \\(3 -
\\(integer\\(kind=4\\)\\) parm...dim\\[1\\].lbound\\), 0, 0B, &ii, 0B,
0\\);|_gfortran_caf_lock \\(caf_token.1, \\(3 - parm...dim\\[0\\].lbound\\) \\+
MAX_EXPR <\\(parm...dim\\[0\\].ubound - parm...dim\\[0\\].lbound\\) \\+ 1, 0>
\\* \\(3 - parm...dim\\[1\\].lbound\\), 0, 0B, &ii, 0B, 0\\);" 1
FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_unlock \\(caf_token.., \\(2 - \\(integer\\(kind=4\\)\\)
parm...dim\\[0\\].lbound\\) \\+ \\(integer\\(kind=4\\)\\) MAX_EXPR
<\\(parm...dim\\[0\\].ubound - parm...dim\\[0\\].lbound\\) \\+ 1, 0> \\* \\(3 -
\\(integer\\(kind=4\\)\\) parm...dim\\[1\\].lbound\\), 0, &ii, 0B,
0\\);|_gfortran_caf_unlock \\(caf_token.., \\(2 - parm...dim\\[0\\].lbound\\)
\\+ MAX_EXPR <\\(parm...dim\\[0\\].ubound - parm...dim\\[0\\].lbound\\) \\+ 1,
0> \\* \\(3 - parm...dim\\[1\\].lbound\\), 0, &ii, 0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_lock \\(three.token, 0, 5 - \\(integer\\(kind=4\\)\\)
three.dim\\[0\\].lbound, &acquired.[0-9]+, 0B, 0B, 0\\);|_gfortran_caf_lock
\\(three.token, 0, 5 - three.dim\\[0\\].lbound, &acquired.[0-9]+, 0B, 0B,
0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_unlock \\(three.token, 0, 8 - \\(integer\\(kind=4\\)\\)
three.dim\\[0\\].lbound, &ii, 0B, 0\\);|_gfortran_caf_unlock \\(three.token, 0,
8 - three.dim\\[0\\].lbound, &ii, 0B, 0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_lock \\(four.token, 1 - \\(integer\\(kind=4\\)\\)
four.dim\\[0\\].lbound, 7 - \\(integer\\(kind=4\\)\\) four.dim\\[1\\].lbound,
&acquired.[0-9]+, &ii, 0B, 0\\);|_gfortran_caf_lock \\(four.token, 1 -
four.dim\\[0\\].lbound, 7 - four.dim\\[1\\].lbound, &acquired.[0-9]+, &ii, 0B,
0\\);" 1
PASS: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
"_gfortran_caf_unlock \\(four.token, 2 - \\(integer\\(kind=4\\)\\)
four.dim\\[0\\].lbound, 8 - \\(integer\\(kind=4\\)\\) four.dim\\[1\\].lbound,
0B, 0B, 0\\);|_gfortran_caf_unlock \\(four.token, 2 - four.dim\\[0\\].lbound, 8
- four.dim\\[1\\].lbound, 0B, 0B, 0\\);" 1
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/dg.exp completed
in 0 seconds
The test case is looking for specific tree sequences and probably just needs to
be updated (once it's checked) to match what is being produced after this
revision.
>From gcc-bugs-return-562460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 14:59:58 2017
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From: "sven.c.dack at sky dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80612] New: ICE compiling grep-3.0 and m4-1.4.18 with LTO
Date: Wed, 03 May 2017 15:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80612
Bug ID: 80612
Summary: ICE compiling grep-3.0 and m4-1.4.18 with LTO
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: sven.c.dack at sky dot com
Target Milestone: ---
Both grep-3.0 and m4-1.4.18 show the same error message, because they both make
use of the same source file "obstack.c".
...
CCLD grep
/dev/shm/build-pkg-25231/src/grep-3.0/lib/obstack.c: In function 'kwsalloc':
/dev/shm/build-pkg-25231/src/grep-3.0/lib/obstack.c:87:12: internal compiler
error: in get_range_info, at tree-ssanames.c:375
return h->chunkfun.extra (h->extra_arg, size);
^
...
CCLD m4
/dev/shm/build-pkg-3058/src/m4-1.4.18/lib/obstack.c: In function
'expand_macro':
/dev/shm/build-pkg-3058/src/m4-1.4.18/lib/obstack.c:87:12: internal compiler
error: in get_range_info, at tree-ssanames.c:375
return h->chunkfun.extra (h->extra_arg, size);
^
The ICE occurs in the final link optimization of the executables. Both packages
were configured as follows:
CFLAGS="-pipe -O3 -march=native -fomit-frame-pointer -fno-builtin-memcmp
-fipa-pta -flto -ffat-lto-objects -flto-partition=one"
LDFLAGS="-Wl,-O1,--hash-style=gnu,--enable-new-dtags,-z,combreloc,-z,noexecstack,-z,relro,-z,now
-pipe -O3 -march=native -fomit-frame-pointer -fno-builtin-memcmp -fipa-pta
-flto -ffat-lto-objects -flto-partition=one -fuse-linker-plugin"
../grep-3.0/configure --prefix=/home/sven/test
make -j24 all
...
Compiler version is:
gcc --version
gcc (GCC) 7.1.1 20170502
>From gcc-bugs-return-562461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 15:12:04 2017
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 15:33:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-03
Ever confirmed|0 |1
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Does it work with GCC 6?
>From gcc-bugs-return-562462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 15:33:57 2017
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Subject: [Bug target/71607] [5/6/7/8 Regression] [ARM] ice due to forbidden enabled attribute dependency on instruction operands
Date: Wed, 03 May 2017 15:36:00 -0000
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--- Comment #13 from Christophe Monat <christophe.monat at st dot com> ---
(In reply to Prakhar Bahuguna from comment #12)
Hi Prakar,
> The patch has now been posted to the mailing list:
> https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00872.html
Thanks for the work, and the kind notification.
I really have high hopes that it will be accepted soon (Ramana, could you
please...?), since I am getting high internal pressure to have it fixed, to
move forward to deliver our own work.
--C
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Subject: [Bug tree-optimization/80612] ICE compiling grep-3.0 and m4-1.4.18 with LTO
Date: Wed, 03 May 2017 15:39:00 -0000
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--- Comment #1 from Sven C. Dack <sven.c.dack at sky dot com> ---
The same ICE can be seen when compiling bison-3.0.4, coreutils-8.27 and
tar-1.29, because these, too, makes use of the same "obstack.c" file.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
Date: Wed, 03 May 2017 16:15:00 -0000
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #5)
> I'm sure a microbench would show that makes a difference.
A micro-benchmark on skylake with -march=native (using just -mavx2 is worse for
gcc without affecting clang) seems to indicate that the speed difference is
within the noise level, consistently whether the data is aligned or not (the
only case where the difference was obvious was when the buffer did not even
have the alignment for a double, where clang won with a large margin, but that
doesn't count).
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Subject: [Bug ipa/80609] [8 Regression] crash_signal in reset_inline_summary on ia64 bootstrap
Date: Wed, 03 May 2017 16:34:00 -0000
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Wed May 3 16:14:32 2017
New Revision: 247555
URL: https://gcc.gnu.org/viewcvs?rev=247555&root=gcc&view=rev
Log:
PR bootstrap/80609
* ipa-inline.h (inline_summary): Add ctor.
(create_ggc): Do not use ggc_cleared_alloc.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.h
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Subject: [Bug tree-optimization/78496] [7/8 Regression] Missed opportunities for jump threading
Date: Wed, 03 May 2017 16:56:00 -0000
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--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed May 3 16:33:45 2017
New Revision: 247556
URL: https://gcc.gnu.org/viewcvs?rev=247556&root=gcc&view=rev
Log:
PR tree-optimization/78496
* tree-vrp.c (simplify_cond_using_ranges_1): Renamed
from simplify_cond_using_ranges. Split off code to walk
backwards through casts into ...
(simplify_cond_using_ranges_2): New function.
(simplify_stmt_using_ranges): Call simplify_cond_using_ranges_1.
(execute_vrp): After identifying jump threads, call
simplify_cond_using_ranges_2.
PR tree-optimization/78496
* gcc.dg/tree-ssa/ssa-thread-15.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-15.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 16:58:00 -0000
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
This is related to PR 61309 and PR 67424.
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
Date: Wed, 03 May 2017 17:11:00 -0000
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--- Comment #6 from Harald Anlauf <anlauf at gmx dot de> ---
The code is properly rejected e.g. by the Intel compiler:
pr80467.f90(16): error #6423: This name has already been used as an external
function name. [GETVALUE]
compareTo = GetValue
--------------------^
pr80467.f90(18): error #8497: Illegal use of a procedure name in an expression,
possibly a function call missing parenthesis. [GETVALUE]
if(Real(i) > GetValue) Then
-------------------------^
compilation aborted for pr80467.f90 (code 1)
or by the Sun compiler:
compareTo = GetValue
^
"pr80467.f90", Line = 16, Column = 21: ERROR: This reference to function
GETVALUE without an actual argument list is illegal.
if(Real(i) > GetValue) Then
^
"pr80467.f90", Line = 18, Column = 26: ERROR: This reference to function
GETVALUE without an actual argument list is illegal.
f90comp: 32 SOURCE LINES
f90comp: 2 ERRORS, 0 WARNINGS, 0 OTHER MESSAGES, 0 ANSI
Thus: ICE on invalid code.
Personal recommendation: always use multiple compilers for enhanced checking
during code development.
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE compiling grep-3.0 and m4-1.4.18 with LTO
Date: Wed, 03 May 2017 17:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80612
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |lto
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-03
CC| |trippels at gcc dot gnu.org
Summary|ICE compiling grep-3.0 and |[7/8 Regression] ICE
|m4-1.4.18 with LTO |compiling grep-3.0 and
| |m4-1.4.18 with LTO
Ever confirmed|0 |1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
% cat kwset.i
a;
xmalloc(int) __attribute__((__alloc_size__(1)));
kwsalloc() { _obstack_begin(a, 0, 0, xmalloc); }
% cat obstack.i
struct obstack {
union {
void *plain;
void (*extra)()
} chunkfun
} _obstack_begin(struct obstack *p1, int p2, int p3, void p4()) {
p1->chunkfun.plain = p4;
p1->chunkfun.extra(p1);
}
% gcc -w -r -nostdlib -flto -O3 -pipe kwset.i obstack.i
obstack.i: In function ‘_obstack_begin.constprop’:
obstack.i:8:3: internal compiler error: in get_range_info, at
tree-ssanames.c:375
p1->chunkfun.extra(p1);
^
0xc977bd get_range_info(tree_node const*, generic_wide_int<wide_int_storage>*,
generic_wide_int<wide_int_storage>*)
/home/markus/gcc/gcc/tree-ssanames.c:375
0x6023d5 get_size_range(tree_node*, tree_node**)
/home/markus/gcc/gcc/calls.c:1274
0x60498d maybe_warn_alloc_args_overflow(tree_node*, tree_node*, tree_node**,
int*)
/home/markus/gcc/gcc/calls.c:1415
0x6061ca initialize_argument_information
/home/markus/gcc/gcc/calls.c:1943
0x6091bc expand_call(tree_node*, rtx_def*, int)
/home/markus/gcc/gcc/calls.c:3267
0x72c779 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/markus/gcc/gcc/expr.c:10833
0x61e0c0 expand_expr
/home/markus/gcc/gcc/expr.h:276
0x61e0c0 expand_call_stmt
/home/markus/gcc/gcc/cfgexpand.c:2658
0x61e0c0 expand_gimple_stmt_1
/home/markus/gcc/gcc/cfgexpand.c:3571
0x61e0c0 expand_gimple_stmt
/home/markus/gcc/gcc/cfgexpand.c:3737
0x61fb9e expand_gimple_tailcall
/home/markus/gcc/gcc/cfgexpand.c:3784
0x61fb9e expand_gimple_basic_block
/home/markus/gcc/gcc/cfgexpand.c:5721
0x62538e execute
/home/markus/gcc/gcc/cfgexpand.c:6357
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
Date: Wed, 03 May 2017 17:29:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|lto |
Summary|[7/8 Regression] ICE |[7/8 Regression] ICE in
|compiling grep-3.0 and |get_range_info, at
|m4-1.4.18 with LTO |tree-ssanames.c:375
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens without -flto:
markus@x4 /tmp % cat test.i
struct obstack *a;
struct obstack {
union {
void *plain;
void (*extra)();
} chunkfun;
} fn1(void p4()) {
a->chunkfun.plain = p4;
a->chunkfun.extra(a);
}
void fn2(int) __attribute__((__alloc_size__(1)));
void fn3() { fn1(fn2); }
markus@x4 /tmp % gcc -O2 test.i
test.i: In function ‘fn3’:
test.i:9:3: internal compiler error: in get_range_info, at tree-ssanames.c:375
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Subject: [Bug tree-optimization/80457] vectorizable_condition does not update the vectorizer cost model
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jgreenhalgh at gcc dot gnu.org
Assignee|wschmidt at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Per https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00967.html, James Greenhalgh
has a more comprehensive patch for this, so removing myself from the Assignee
field and will await his patch. Thanks, James!
>From gcc-bugs-return-562472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 18:13:43 2017
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Subject: [Bug c++/80613] New: ice in is_gimple_reg_type with -O2
Date: Wed, 03 May 2017 18:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80613
Bug ID: 80613
Summary: ice in is_gimple_reg_type with -O2
Product: gcc
Version: 7.0
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Created attachment 41306
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41306&action=edit
gzipped C++ source code
The attached code, when compiled by today's gcc trunk and
compiler flag -c -O2, does this:
tcpserver.cc: In member function ‘virtual int TcpServer::EnableServer()’:
tcpserver.cc:361:1: internal compiler error: Segmentation fault
0xe5b59f crash_signal
../../trunk/gcc/toplev.c:337
0xe94aed is_gimple_reg_type
../../trunk/gcc/gimple-expr.h:75
0xe94aed verify_gimple_call
../../trunk/gcc/tree-cfg.c:3520
0xe94aed verify_gimple_stmt
../../trunk/gcc/tree-cfg.c:4738
The problem seems to have appeared between revision 246605 and 247438.
These two revisions are from the end of March and the start of May.
I'll try to reduce the code.
>From gcc-bugs-return-562473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 18:20:06 2017
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Subject: [Bug target/68491] libgcc calls __get_cpuid with 0 level breaks on early 486
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--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed May 3 18:19:28 2017
New Revision: 247561
URL: https://gcc.gnu.org/viewcvs?rev=247561&root=gcc&view=rev
Log:
Backport from mainline
2017-05-01 Uros Bizjak <ubizjak@gmail.com>
PR target/68491
* config/i386/cpuid.h (__get_cpuid): Always return 0 when
__get_cpuid_max returns 0.
(__get_cpuid_count): Ditto.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/cpuid.h
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This should fix it:
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -1270,7 +1270,7 @@ get_size_range (tree exp, tree range[2])
wide_int min, max;
enum value_range_type range_type
- = (TREE_CODE (exp) == SSA_NAME
+ = ((TREE_CODE (exp) == SSA_NAME && INTEGRAL_TYPE_P (TREE_TYPE (exp)))
? get_range_info (exp, &min, &max) : VR_VARYING);
if (range_type == VR_VARYING)
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Subject: [Bug c++/80613] ice in is_gimple_reg_type with -O2
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced C++ code is
extern "C" void free(void *);
char *a(int);
extern "C" char *strdup(const char *);
int b;
void c() {
for (;;) {
char d = *a(b);
char *e = strdup(&d);
free(e);
}
}
>From gcc-bugs-return-562476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 19:08:05 2017
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Subject: [Bug c++/80614] New: Bad mangling for noexcept abominable function types
Date: Wed, 03 May 2017 19:42:00 -0000
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Bug ID: 80614
Summary: Bad mangling for noexcept abominable function types
Product: gcc
Version: 7.0
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The following simple program complains about duplicate definitions for two
different template instantiations:
template <typename T> void fn() {}
int main() {
fn<void() const>();
fn<void() const noexcept>();
}
>From extensive testing (I'm validating a type traits library) it seems specific
to "abominable" function types differing only in the noexcept specification, so
is a C++17 specific failure.
>From gcc-bugs-return-562477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 19:42:40 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 bootstrap/80615] New: [8 Regression] Boostrap --enable-maintainer-mode fails because genmddeps nees not-yet-built libiberty.a
Date: Wed, 03 May 2017 19:43:00 -0000
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Bug ID: 80615
Summary: [8 Regression] Boostrap --enable-maintainer-mode
fails because genmddeps nees not-yet-built libiberty.a
Product: gcc
Version: 7.1.0
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Created attachment 41307
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41307&action=edit
config.log which fails
Configure command:
../trunk/gcc/configure --prefix=$HOME --enable-languages=c,c++,fortran,lto
--enable-maintainer-mode
Bootstrapping compiler:
g25@linux-d6cw:~/Gcc/trunk-bin> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/ig25/lib/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure --prefix=/home/ig25
--enable-languages=c,c++,fortran,lto
Thread model: posix
gcc version 8.0.0 20170501 (experimental) (GCC)
Error message:
ig25@linux-d6cw:~/Gcc/trunk-bin> make -j4
TARGET_CPU_DEFAULT="" \
HEADERS="auto-host.h ansidecl.h" DEFINES="" \
/bin/sh ../trunk/gcc/mkconfig.sh config.h
TARGET_CPU_DEFAULT="" \
HEADERS="options.h insn-constants.h config/vxworks-dummy.h
config/i386/biarch64.h config/i386/i386.h config/i386/unix.h config/i386/att.h
config/dbxelf.h config/elfos.h config/gnu-user.h config/glibc-stdint.h
config/i386/x86-64.h config/i386/gnu-user-common.h config/i386/gnu-user64.h
config/linux.h config/linux-android.h config/i386/linux-common.h
config/i386/linux64.h config/initfini-array.h defaults.h" DEFINES="LIBC_GLIBC=1
LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4 DEFAULT_LIBC=LIBC_GLIBC
ANDROID_DEFAULT=0" \
/bin/sh ../trunk/gcc/mkconfig.sh tm.h
TARGET_CPU_DEFAULT="" \
HEADERS="config/i386/i386-protos.h config/linux-protos.h tm-preds.h" DEFINES=""
\
/bin/sh ../trunk/gcc/mkconfig.sh tm_p.h
TARGET_CPU_DEFAULT="" \
HEADERS="auto-host.h ansidecl.h" DEFINES="" \
/bin/sh ../trunk/gcc/mkconfig.sh bconfig.h
make: *** No rule to make target
'../build-x86_64-pc-linux-gnu/libiberty/libiberty.a', needed by
'build/genmddeps'. Stop.
make: *** Waiting for unfinished jobs....
config.h is unchanged
tm_p.h is unchanged
bconfig.h is unchanged
tm.h is unchanged
>From gcc-bugs-return-562478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 19:43:48 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 bootstrap/80615] [8 Regression] Boostrap --enable-maintainer-mode fails because genmddeps nees not-yet-built libiberty.a
Date: Wed, 03 May 2017 19:44:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.1.0 |8.0
Target Milestone|--- |8.0
Severity|normal |blocker
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This blocks some development on libgfortran.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
Date: Wed, 03 May 2017 19:50:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
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From: "nightstrike at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80616] New: Slow vector multiply compared to icc
Date: Wed, 03 May 2017 19:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80616
Bug ID: 80616
Summary: Slow vector multiply compared to icc
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: nightstrike at gmail dot com
Target Milestone: ---
Created attachment 41308
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41308&action=edit
Testcase
If I compile the following:
float vmul(int N, float A[N], float B[N]) {
float total = 0.0f;
for (int i = 0; i < N; ++i)
total += A[i] * B[i];
return total;
}
GCC gives me a time of 7us and icc gives me 1us for 4k elements using -O3
-march=native on bdver2.
$ gcc v.c -lrt -O3 -march=native -save-temps
$ ./a.out
Val: 4772697023455277613056.000000
Time: 0.000007
$icc v.c -lrt -O3 -xHost -save-temps
$ ./a.out
Val: 4772700964104951562240.000000
Time: 0.000001
Attached small source code, will add asm in followup.
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--- Comment #1 from nightstrike <nightstrike at gmail dot com> ---
Created attachment 41309
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gcc.s asm
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Subject: [Bug c/80616] Slow vector multiply compared to icc
Date: Wed, 03 May 2017 20:01:00 -0000
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icc.s asm
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From: "uros at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68491] libgcc calls __get_cpuid with 0 level breaks on early 486
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--- Comment #6 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed May 3 20:00:50 2017
New Revision: 247566
URL: https://gcc.gnu.org/viewcvs?rev=247566&root=gcc&view=rev
Log:
Backport from mainline
2017-05-01 Uros Bizjak <ubizjak@gmail.com>
PR target/68491
* config/i386/cpuid.h (__get_cpuid): Always return 0 when
__get_cpuid_max returns 0.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/cpuid.h
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Subject: [Bug target/68491] libgcc calls __get_cpuid with 0 level breaks on early 486
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed everywhere.
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Subject: [Bug bootstrap/80615] [8 Regression] Boostrap fails because genmddeps nees not-yet-built libiberty.a
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8 Regression] Boostrap |[8 Regression] Boostrap
|--enable-maintainer-mode |fails because genmddeps
|fails because genmddeps |nees not-yet-built
|nees not-yet-built |libiberty.a
|libiberty.a |
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Does not even need --enable-maintainer-mode.
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Subject: [Bug tree-optimization/80617] New: [missed optimization] Storing constant in two possibly-aliased locations
Date: Wed, 03 May 2017 20:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80617
Bug ID: 80617
Summary: [missed optimization] Storing constant in two
possibly-aliased locations
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: herring at lanl dot gov
Target Milestone: ---
Swapping (by move-construction/assignment) two instances of
struct A { // vaguely unique_ptr-like
void *p;
A(A &&a) : p(a.release()) {}
~A() {if(p) std::free(p);} // not that you can't free(nullptr)
void* release() {return std::exchange(p,nullptr);}
void swap(A &a) {std::swap(p,a.p);}
// Make temporary to guarantee destroying replaced p before returning:
A& operator=(A &&a) {A(std::move(a)).swap(*this); return *this;}
};
can never result in a call to free (not even free(nullptr)), since all the
temporaries being destroyed have been moved-from. However, due presumably to a
fear of aliasing (i.e., "A a={0}; std::swap(a,a);"), the optimizer does not
remove the conditionals:
movq (%rdi), %rbp
movq $0, (%rdi) ; store #1
movq (%rsi), %rdx
movq $0, (%rsi) ; this store could clobber #1
movq (%rdi), %rax ; but this reads 0 regardless
movq %rdx, (%rdi)
testq %rax, %rax ; testq 0, 0
je .L2 ; will always be taken
; call free, check the other object, call free again...
Thus std::swap<A> is several times as large and slow as the member swap:
movq (%rdi), %rax
movq (%rsi), %rdx
movq %rdx, (%rdi)
movq %rax, (%rsi)
ret
Full example (including a hack to show the assembly from HEAD) at
https://wandbox.org/permlink/PZ7d7MwSVAlvrUA2
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Subject: [Bug bootstrap/80615] [8 Regression] Boostrap fails because genmddeps nees not-yet-built libiberty.a
Date: Wed, 03 May 2017 20:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80615
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hmm.. this seems to have been a problem due to a corrupted
source tree. Downloading a new tree appears to have solved
the problem.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80618] New: [8 regression] test case gcc.dg/pr50310-2.c fails with ICE starting with 247544
Date: Wed, 03 May 2017 20:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80618
Bug ID: 80618
Summary: [8 regression] test case gcc.dg/pr50310-2.c fails with
ICE starting with 247544
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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spawn /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O3 -lm -o
./pr50310-2.exe
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c: In function
'main':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: error:
unrecognizable insn:
(insn 361 360 176 2 (set (reg:V2DF 342)
(not:V2DF (ior:V2DF (reg:V2DF 470)
(reg:V2DF 471))))
"/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c":30 -1
(nil))
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: internal
compiler error: in extract_insn, at recog.c:2311
0x1087afb3 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:108
0x1087b017 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:116
0x1083f6b7 extract_insn(rtx_insn*)
/home/seurer/gcc/gcc-trunk/gcc/recog.c:2311
0x111c4b87 decompose_multiword_subregs
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1467
0x111c62cb execute
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1734
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.
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c: In function
'main':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: error:
unrecognizable insn:
(insn 361 360 176 2 (set (reg:V2DF 342)
(not:V2DF (ior:V2DF (reg:V2DF 470)
(reg:V2DF 471))))
"/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c":30 -1
(nil))
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: internal
compiler error: in extract_insn, at recog.c:2311
0x1087afb3 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:108
0x1087b017 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:116
0x1083f6b7 extract_insn(rtx_insn*)
/home/seurer/gcc/gcc-trunk/gcc/recog.c:2311
0x111c4b87 decompose_multiword_subregs
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1467
0x111c62cb execute
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1734
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.
FAIL: gcc.dg/pr50310-2.c (internal compiler error)
FAIL: gcc.dg/pr50310-2.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: error:
unrecognizable insn:
(insn 361 360 176 2 (set (reg:V2DF 342)
(not:V2DF (ior:V2DF (reg:V2DF 470)
(reg:V2DF 471))))
"/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c":30 -1
(nil))
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: internal
compiler error: in extract_insn, at recog.c:2311
0x1087afb3 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:108
0x1087b017 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/seurer/gcc/gcc-trunk/gcc/rtl-error.c:116
0x1083f6b7 extract_insn(rtx_insn*)
/home/seurer/gcc/gcc-trunk/gcc/recog.c:2311
0x111c4b87 decompose_multiword_subregs
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1467
0x111c62cb execute
/home/seurer/gcc/gcc-trunk/gcc/lower-subreg.c:1734
UNRESOLVED: gcc.dg/pr50310-2.c compilation failed to produce executable
>From gcc-bugs-return-562489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 20:58:00 2017
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
Date: Wed, 03 May 2017 21:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80602
Bug 80602 depends on bug 80615, which changed state.
Bug 80615 Summary: [8 Regression] Boostrap fails because genmddeps nees not-yet-built libiberty.a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80615
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
>From gcc-bugs-return-562490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 21:03:44 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80619] New: bad fix-it hint for GCC %lu directive with int argument: %wu
Date: Wed, 03 May 2017 21:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80619
Bug ID: 80619
Summary: bad fix-it hint for GCC %lu directive with int
argument: %wu
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
When the %lu printf directive in a function decorated with attribute format
__gcc_diag__ is passed an int argument GCC issues a warning as expected, but
then proceeds to suggest to replace the directive with %wu. This suggestion is
wrong because %wu expects an unsigned HOST_WIDE_INT argument, a type that is
typically wider than int. The correct hint is "%u".
$ cat x.c && gcc -O2 -S -Wall -Wpedantic x.c
void f (const char*, ...) __attribute__ ((format (__gcc_diag__, 1, 2)));
void h (void)
{
f ("%lu", 0);
}
x.c: In function ‘h’:
x.c:5:9: warning: format ‘%lu’ expects argument of type ‘long unsigned int’,
but argument 2 has type ‘int’ [-Wformat=]
f ("%lu", 0);
~~^
%wu
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Subject: [Bug tree-optimization/80618] [8 regression] test case gcc.dg/pr50310-2.c fails with ICE starting with 247544
Date: Wed, 03 May 2017 21:05:00 -0000
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--- Comment #1 from seurer at gcc dot gnu.org ---
Also this test:
FAIL: gcc.c-torture/execute/ieee/pr50310.c compilation, -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions
(internal compiler error)
FAIL: gcc.c-torture/execute/ieee/pr50310.c compilation, -O3 -g (internal
compiler error)
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Subject: [Bug c/80616] Slow vector multiply compared to icc
Date: Wed, 03 May 2017 21:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80616
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
Intel defaults to the equivalent of -ffast-math, did you try with that?
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Subject: [Bug tree-optimization/80618] [8 regression] test case gcc.dg/pr50310-2.c fails with ICE starting with 247544
Date: Wed, 03 May 2017 21:24:00 -0000
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--- Comment #2 from seurer at gcc dot gnu.org ---
And some C and FORTRAN vector test cases fail as well
> FAIL: gcc.dg/vect/vect-44.c -flto -ffat-lto-objects scan-tree-dump-times vect "Alignment of access forced using peeling" 1
> FAIL: gcc.dg/vect/vect-44.c -flto -ffat-lto-objects scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gcc.dg/vect/vect-44.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
> FAIL: gcc.dg/vect/vect-44.c scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect "Alignment of access forced using peeling" 1
> FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
> FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gfortran.dg/vect/vect-2.f90 -O scan-tree-dump-times vect "Alignment of access forced using peeling" 3
> FAIL: gfortran.dg/vect/vect-2.f90 -O scan-tree-dump-times vect "Vectorizing an unaligned access" 2
> FAIL: gfortran.dg/vect/vect-5.f90 -O scan-tree-dump-times vect "Alignment of access forced using peeling" 1
> FAIL: gfortran.dg/vect/vect-5.f90 -O scan-tree-dump-times vect "Vectorizing an unaligned access" 1
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Subject: [Bug c++/80601] spurious -Wconversion warning with explicit class template arguments
Date: Wed, 03 May 2017 21:25:00 -0000
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--- Comment #2 from Jens Maurer <jens.maurer at gmx dot net> ---
(In reply to Jonathan Wakely from comment #1)
> Strictly speaking the compiler is correct that the type of sizeof(T) is not
> dependent, so for LP64 targets will always need a conversion to a narrower
> type.
Right, but I would expect -Wconversion warnings to respect the C++ narrowing
rules for brace-initialization, which (among other things) state for integer
conversions that there is no narrowing if the original constant value fits into
the target type.
In the following example, there is no error or warning; the narrowing check is
(correctly) postponed to template instantiation time:
template<class T>
void g(T)
{
unsigned int x { sizeof(T) };
}
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Wed, 03 May 2017 21:37:00 -0000
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krister.walfridsson at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |krister.walfridsson at gmail dot c
| |om
--- Comment #7 from krister.walfridsson at gmail dot com ---
Yes, it works with GCC 6, and it used to work with GCC 7. My guess is that it
started to fail with r243219.
I'm at a conference the rest of this week, but I'll fix this as soon as I'm
back.
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
Date: Wed, 03 May 2017 21:38:00 -0000
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--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This is the idea:
--- matmul_internal.m4 (revision 247566)
+++ matmul_internal.m4 (working copy)
@@ -202,7 +202,7 @@ sinclude(`matmul_asm_'rtype_code`.m4')dnl
i1, i2, i3, i4, i5, i6;
/* Local variables */
- 'rtype_name` t1[65536], /* was [256][256] */
+ 'rtype_name`
f11, f12, f21, f22, f31, f32, f41, f42,
f13, f14, f23, f24, f33, f34, f43, f44;
index_type i, j, l, ii, jj, ll;
@@ -227,6 +227,14 @@ sinclude(`matmul_asm_'rtype_code`.m4')dnl
if (m == 0 || n == 0 || k == 0)
return;
+ /* Adjust size of t1 to what is needed. */
+ index_type t1_dim;
+ t1_dim = (a_dim1-1) * 256 + b_dim1);
+ if (t1_dim > 65536)
+ t1_dim = 65536;
+
+ 'rtype_name` t1[t1_dim], /* was [256][256] */
+
/* Empty c first. */
for (j=1; j<=n; j++)
for (i=1; i<=m; i++)
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Subject: [Bug tree-optimization/80620] New: gcc produces wrong code with -O3
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Bug ID: 80620
Summary: gcc produces wrong code with -O3
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
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Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
Created attachment 41311
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41311&action=edit
Reproducer.
gcc produces wrong code with -O3. It fails on multiple architectures (knl,
skylake-avx512 and others)
Reproducer:
>$ cat func.c
extern const long int var_10;
extern int var_43;
extern int var_732;
extern int var_743;
extern int var_748;
extern int var_999;
extern unsigned long int var_751;
void foo() {
if (!var_10 - var_10)
var_732 = var_43 = 0;
else
var_743 = 3UL * var_10 == 0;
if (var_999 / var_10)
var_748 = 0 < -var_10 + 500849970701012771 + (unsigned long)-var_10;
else
var_751 = 4081116982543369 & var_10;
}
>$ cat driver.c
#include <stdio.h>
const long int var_10 = -465274079317386463L;
int var_43 = 856872806;
int var_732 = -1940894202;
int var_743 = 1718449211;
int var_748 = -392681565;
unsigned long int var_751 = 13521452247506316486UL;
int var_999 = -13194608;
extern void foo ();
int main () {
foo ();
printf("%lu\n", var_751);
return 0;
}
Error:
>$ gcc -O3 driver.c func.c ; ./a.out
17981469994392165153
>$ gcc -O0 driver.c func.c ; ./a.out
2818598057803777
GCC revision: 247564
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
s/t1_dim = (a_dim1-1) * 256 + b_dim1);/t1_dim = (a_dim1-1) * 256 + b_dim1;/
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Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
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Eric Fiselier <eric at efcs dot ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eric at efcs dot ca
--- Comment #1 from Eric Fiselier <eric at efcs dot ca> ---
Note that the instantiation is not spurious, but instead required by the core
language. All overloads of _Bind::operator() are considered during the call to
the forwarding call wrapper.
While considering the const qualified overload the compiler is forced to
instantiate the lambda to deduce the return type. This causes a error in a
non-immediate context which causes the compile error.
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Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
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--- Comment #2 from Eric Fiselier <eric at efcs dot ca> ---
Note that explicitly providing a return type for the lambda avoids this compile
error. Example:
---
#include <functional>
int main() {
int i;
std::bind([] (auto& x) -> void {x = 1;}, i)(); // OK!
}
---
>From gcc-bugs-return-562501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 22:37:31 2017
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Subject: [Bug c/80616] Slow vector multiply compared to icc
Date: Wed, 03 May 2017 22:39:00 -0000
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nightstrike <nightstrike at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #4 from nightstrike <nightstrike at gmail dot com> ---
(In reply to Marc Glisse from comment #3)
> Intel defaults to the equivalent of -ffast-math, did you try with that?
*sigh*... no, I didn't. And of course, that makes them exactly equal. In
fact, for larger size (100k) to get more time resolution, they are exactly
equal for either gcc with -ffast-math and intel defaults, or gcc defaults and
intel with -fp-model=strict.
So yes, nothing to see here. Sorry for the noise :(
This is why I like to ask silly things first on IRC or the mailing list.
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Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
Date: Wed, 03 May 2017 22:47:00 -0000
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--- Comment #3 from Eric Fiselier <eric at efcs dot ca> ---
Here is an example of why `_Bind::operator()(...) const` must be considered
during overload resolution even if the call wrapper itself is not const.
------------------------------
#include <functional>
struct Func {
template <class ...Args>
void operator()(Args&&...) = delete;
template <class ...Args>
void operator()(Args&&...) const {}
};
int main() {
Func f;
std::bind(f)();
}
-------------------------
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Subject: [Bug other/80621] New: [8-regression] internal compiler error: Segmentation fault
Date: Wed, 03 May 2017 22:49:00 -0000
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Bug ID: 80621
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fault
Product: gcc
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Created attachment 41312
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41312&action=edit
Sample file
The attached testcase (from Wine, in particular wine/tools/wrc) started
to trigger an internal compiler error/segfault about four days ago.
The only option required is -O1; by default or with -Os or -Og this does
not happen.
>From gcc-bugs-return-562504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 22:49:58 2017
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
Date: Wed, 03 May 2017 22:57:00 -0000
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--- Comment #5 from kugan at gcc dot gnu.org ---
(In reply to Marek Polacek from comment #4)
> This should fix it:
>
> --- a/gcc/calls.c
> +++ b/gcc/calls.c
> @@ -1270,7 +1270,7 @@ get_size_range (tree exp, tree range[2])
>
> wide_int min, max;
> enum value_range_type range_type
> - = (TREE_CODE (exp) == SSA_NAME
> + = ((TREE_CODE (exp) == SSA_NAME && INTEGRAL_TYPE_P (TREE_TYPE (exp)))
> ? get_range_info (exp, &min, &max) : VR_VARYING);
>
> if (range_type == VR_VARYING)
Looked at the other uses of get_range_info too. There are uses of this in
gcc/gimple-ssa-warn-alloca.c without the check for INTEGRAL_TYPE_P but I think
it is intentional.
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Subject: [Bug other/80621] [8-regression] internal compiler error: Segmentation fault
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Gerald Pfeifer <gerald at pfeifer dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i586-unknown-freebsd10.3
Host| |i586-unknown-freebsd10.3
Known to fail| |8.0
Build| |i586-unknown-freebsd10.3
--- Comment #1 from Gerald Pfeifer <gerald at pfeifer dot com> ---
GNU C11 (GCC) version 8.0.0 20170503 (experimental) (i586-unknown-freebsd10.3)
compiled by GNU C version 8.0.0 20170503 (experimental), GMP version
5.1.3, MPFR version 3.1.2, MPC version 1.0.3, isl version isl-0.15-GMP
Using this preprocessed source on a x86_64-unknown-freebsd11.0 system
seems to run into the same.
>From gcc-bugs-return-562506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 03 23:02:49 2017
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Subject: [Bug c/80622] New: wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
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$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170503 (experimental) [trunk revision 247550] (GCC)
$ gcc-trunk small.c -O3 ; ./a.out
0
$ gcc-trunk small.c -O3 -m32 ; ./a.out
0
$ gcc-trunk small.c -O1 -m32 ; ./a.out
0
$ gcc-trunk small.c -O0 -m32 ; ./a.out
4
$
$ cat small.c
int printf(const char *, ...);
struct S2 {
int f2;
char f4;
int f5;
char f6;
} a;
int main() {
struct S2 b[][1] = {3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3,
0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0,
3, 4, 3, 4, 7, 7, 3, 5, 0, 3, 4, 7, 7, 3, 5, 0, 3,
4, 3, 4, 7, 7, 3, 5, 0, 3, 4, 7, 7, 3, 5, 0, 3, 4};
a = b[4][0];
b[4][0].f4 &printf("%d\n", a.f6);
return 0;
}
$
$ gcc-5.4 small.c -O3 -m32 ; ./a.out
4
$
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Subject: [Bug tree-optimization/80457] vectorizable_condition does not update the vectorizer cost model
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--- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
(In reply to Bill Schmidt from comment #2)
> Per https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00967.html, James
> Greenhalgh has a more comprehensive patch for this, so removing myself from
> the Assignee field and will await his patch. Thanks, James!
I'm out of office until June, would you mind applying the patch on my behalf
(and reverting it if anything goes wrong!) in my abscence? Thanks!
>From gcc-bugs-return-562508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 06:27:33 2017
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Subject: [Bug tree-optimization/80620] gcc produces wrong code with -O3
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
For some reason func.c, compiled with -O3 is missing a couple of insns vs -O2:
$ diff -u func-O2.s func-O3.s
--- func-O2.s 2017-05-04 08:24:33.000000000 +0200
+++ func-O3.s 2017-05-04 08:23:26.000000000 +0200
@@ -19,8 +19,6 @@
idivq %rcx
testq %rax, %rax
jne .L7
- movabsq $4081116982543369, %rax
- andq %rax, %rcx
movq %rcx, var_751(%rip)
ret
.p2align 4,,10
>From gcc-bugs-return-562509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 06:31:46 2017
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Subject: [Bug tree-optimization/80620] gcc produces wrong code with -O3
Date: Thu, 04 May 2017 06:59:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
Ever confirmed|0 |1
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Already missing from optimized tree dump:
--- func.c.227t.optimized-O2 2017-05-04 08:29:26.000000000 +0200
+++ func.c.227t.optimized-O3 2017-05-04 08:30:15.000000000 +0200
@@ -12,7 +12,6 @@
int var_999.5_8;
long int _9;
long int _11;
- long unsigned int _18;
long unsigned int _29;
<bb 2> [100.00%]:
@@ -50,8 +49,7 @@
goto <bb 8>; [100.00%]
<bb 7> [54.00%]:
- _18 = _29 & 4081116982543369;
- var_751 = _18;
+ var_751 = _29;
<bb 8> [100.00%]:
return;
>From gcc-bugs-return-562510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 06:59:37 2017
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Subject: [Bug tree-optimization/80620] [7/8 Regression] gcc produces wrong code with -O3
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.2
Summary|gcc produces wrong code |[7/8 Regression] gcc
|with -O3 |produces wrong code with
| |-O3
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r247049.
>From gcc-bugs-return-562511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:09:30 2017
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Subject: [Bug tree-optimization/80620] [7/8 Regression] gcc produces wrong code with -O3
Date: Thu, 04 May 2017 07:28:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Simplified testcase (for -O3):
long long int a = -465274079317386463LL;
int b = 856872806;
int c = -1940894202;
int d = 1718449211;
int e = -392681565;
unsigned long long int f = 13521452247506316486ULL;
int g = -13194608;
__attribute__((noinline, noclone))
void foo ()
{
if (!a - a)
c = b = 0;
else
d = 3UL * a == 0;
if (g / a)
e = 0 < -a + 500849970701012771LL + (unsigned long) -a;
else
f = 4081116982543369LL & a;
}
int
main ()
{
asm volatile ("" : : : "memory");
foo ();
if (f != 2818598057803777LL)
__builtin_abort ();
return 0;
}
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Subject: [Bug c/80622] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
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What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
struct S { int d; char e; int f; char g; } a;
char c;
int
main ()
{
struct S b[][1] = {3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3,
0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0, 3, 4, 3, 0,
3, 4, 3, 4, 7, 7, 3, 5, 0, 3, 4, 7, 7, 3, 5, 0, 3,
4, 3, 4, 7, 7, 3, 5, 0, 3, 4, 7, 7, 3, 5, 0, 3, 4};
a = b[4][0];
c = b[4][0].e;
if (a.g != 4)
__builtin_abort ();
return 0;
}
Seems this goes wrong in esra.
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Subject: [Bug tree-optimization/31130] [5/6/7/8 Regression] VRP no longer derives range for division after negation
Date: Thu, 04 May 2017 07:33:00 -0000
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--- Comment #28 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 4 07:29:55 2017
New Revision: 247578
URL: https://gcc.gnu.org/viewcvs?rev=247578&root=gcc&view=rev
Log:
2017-05-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/31130
* tree-vrp.c (needs_overflow_infinity): Remove as always returning
false.
(supports_overflow_infinity): Likewise.
(is_negative_overflow_infinity): Likewise.
(is_positive_overflow_infinity): Likewise.
(is_overflow_infinity): Likewise.
(stmt_overflow_infinity): Likewise.
(overflow_infinity_range_p): Likewise.
(usable_range_p): Remove as always returning true.
(make_overflow_infinity): Remove.
(negative_overflow_infinity): Likewise.
(positive_overflow_infinity): Likewise.
(avoid_overflow_infinity): Likewise.
(set_value_range): Adjust accordingly.
(set_value_range_to_nonnegative): Likewise, remove now unused
overflow_infinity arg.
(vrp_operand_equal_p): Adjust.
(update_value_range): Likewise.
(range_int_cst_singleton_p): Likewise.
(operand_less_p): Likewise.
(compare_values_warnv): Likewise.
(extract_range_for_var_from_comparison_expr): Likewise.
(vrp_int_const_binop): Likewise.
(zero_nonzero_bits_from_vr): Likewise.
(extract_range_from_multiplicative_op_1): Likewise.
(extract_range_from_binary_expr_1): Likewise.
(extract_range_from_unary_expr): Likewise.
(extract_range_from_comparison): Likewise.
(extract_range_basic): Likewise.
(adjust_range_with_scev): Likewise.
(compare_ranges): Likewise.
(compare_range_with_value): Likewise.
(dump_value_range): Likewise.
(test_for_singularity): Likewise, remove strict_overflow_p parameter
never used.
(simplify_cond_using_ranges): Adjust.
* gcc.dg/Wstrict-overflow-12.c: XFAIL.
* gcc.dg/Wstrict-overflow-13.c: Likewise.
* gcc.dg/Wstrict-overflow-21.c: Likewise.
* gcc.dg/pr52904.c: Remove XFAIL.
* gcc.dg/tree-ssa/vrp114.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp114.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-12.c
trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-13.c
trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-21.c
trunk/gcc/testsuite/gcc.dg/pr52904.c
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/80621] [8 regression] internal compiler error: Segmentation fault
Date: Thu, 04 May 2017 07:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
Component|other |tree-optimization
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|[8-regression] internal |[8 regression] internal
|compiler error: |compiler error:
|Segmentation fault |Segmentation fault
Target Milestone|--- |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
What's the ICE? Ok, reproduces on x86_64-linux:
translation.c: In function 'verify_translations':
translation.c:967:6: internal compiler error: Segmentation fault
0xf0eecc crash_signal
/space/rguenther/src/svn/trunk/gcc/toplev.c:337
0xf4fed8 is_gimple_reg_type
/space/rguenther/src/svn/trunk/gcc/gimple-expr.h:75
0xf5c5cc verify_gimple_call
/space/rguenther/src/svn/trunk/gcc/tree-cfg.c:3548
0xf60828 verify_gimple_stmt
/space/rguenther/src/svn/trunk/gcc/tree-cfg.c:4766
0xf61a75 verify_gimple_in_cfg(function*, bool)
/space/rguenther/src/svn/trunk/gcc/tree-cfg.c:5244
0xdda33a execute_function_todo
/space/rguenther/src/svn/trunk/gcc/passes.c:1968
0xdd93e1 do_per_function
/space/rguenther/src/svn/trunk/gcc/passes.c:1652
0xdda522 execute_todo
/space/rguenther/src/svn/trunk/gcc/passes.c:2022
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
This usually means there's a released SSA name in the IL. I suspect my CFG
cleanup change.
Let's see if anyone can bisect to that and reduce the testcase.
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
Component|c |tree-optimization
Known to work| |7.1.0
Target Milestone|--- |8.0
Summary|wrong code at -O1 and above |[8 Regression] wrong code
|in both 32-bit and 64-bit |at -O1 and above in both
|modes on x86_64-linux-gnu |32-bit and 64-bit modes on
| |x86_64-linux-gnu
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
For me it works with 7.1.
>From gcc-bugs-return-562516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:37:12 2017
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 07:38:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yes, it is a regression in between r247445 and r247508, I strongly suspect
r247497.
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Subject: [Bug tree-optimization/80620] [8 Regression] gcc produces wrong code with -O3
Date: Thu, 04 May 2017 07:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Version|7.0.1 |8.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|7.2 |8.0
Summary|[7/8 Regression] gcc |[8 Regression] gcc produces
|produces wrong code with |wrong code with -O3
|-O3 |
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The rev. is not on the GCC 7 branch. I will have a look.
>From gcc-bugs-return-562518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:40:56 2017
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Subject: [Bug tree-optimization/80618] [8 regression] test case gcc.dg/pr50310-2.c fails with ICE starting with 247544
Date: Thu, 04 May 2017 07:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-04
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well, as this was only a costmodel change I suspect the ICEs would have
reproduced before that rev. if you pass --param
vect-max-peeling-for-alignment=0?
>From gcc-bugs-return-562519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:41:57 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODA1OTNdIFs3LzggUmVncmVzc2lvbl0gR0NDIDcsIGFsaWdu?= =?UTF-8?B?ZWRfc3RvcmFnZSBhbmQg4oCcZGVyZWZlcmVuY2luZyB0eXBlLXB1bm5lZCBw?= =?UTF-8?B?b2ludGVyIHdpbGwgYnJlYWsgc3RyaWN0LWFsaWFzaW5nIHJ1bGVz4oCd?Date: Thu, 04 May 2017 07:43:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The set1 == 0 stuff has been added in r136679.
>From gcc-bugs-return-562520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:43:20 2017
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-04
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you please attach the whole example? One can't cut&paste from this stupid
web page.
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Subject: [Bug c++/80614] [7/8 Regression] Bad mangling for noexcept abominable function types
Date: Thu, 04 May 2017 07:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
Target Milestone|--- |7.2
Summary|Bad mangling for noexcept |[7/8 Regression] Bad
|abominable function types |mangling for noexcept
| |abominable function types
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, needs -std=c++17, works with GCC 6, fails with GCC 7.
> g++-6 t.C -std=c++17
> g++-7 t.C -std=c++17
/tmp/cc9O32gK.s: Assembler messages:
/tmp/cc9O32gK.s:42: Error: symbol `_Z2fnIKFvvEEvv' is already defined
> c++filt _Z2fnIKFvvEEvv
void fn<void () const>()
> g++-6 t.C -std=c++17 -c
> nm t.o
0000000000000000 W _Z2fnIKFvvEEvv
0000000000000000 T main
so that it works with GCC 6 might be because of another bug (the instantiation
is missing).
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Subject: [Bug tree-optimization/80621] [8 regression] internal compiler error: Segmentation fault
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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> ---
Dup has reduced testcase.
*** This bug has been marked as a duplicate of bug 80613 ***
>From gcc-bugs-return-562523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:47:32 2017
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Subject: [Bug c++/80613] ice in is_gimple_reg_type with -O2
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----------------------------------------------------------------------------
CC| |gerald at pfeifer dot com
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80621 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
Date: Thu, 04 May 2017 07:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |7.2
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fix looks obvious - though I wonder why we call get_size_range on sth not
integral... maybe there's a lurking bug elsewhere.
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Subject: [Bug c++/80613] 8ice in is_gimple_reg_type with -O2
Date: Thu, 04 May 2017 07:51:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
CC| |marxin at gcc dot gnu.org,
| |prathamesh3492 at gcc dot gnu.org
Summary|ice in is_gimple_reg_type |8ice in is_gimple_reg_type
|with -O2 |with -O2
Ever confirmed|0 |1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r247407.
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Subject: [Bug c++/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Thu, 04 May 2017 07:54:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|8ice in is_gimple_reg_type |[8 Regression] ICE in
|with -O2 |is_gimple_reg_type with -O2
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r247407.
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 07:55:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm that r247497 is first problematic revision.
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Subject: [Bug c++/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Version|7.0 |8.0
Target Milestone|--- |8.0
>From gcc-bugs-return-562527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 07:54:16 2017
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Thu, 04 May 2017 07:55:00 -0000
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--- Comment #5 from prathamesh3492 at gcc dot gnu.org ---
Sorry for the breakage, I will take a look.
Regards,
Prathamesh
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
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--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu May 4 07:54:59 2017
New Revision: 247579
URL: https://gcc.gnu.org/viewcvs?rev=247579&root=gcc&view=rev
Log:
Replace absolute line numbers in gcc.target/i386
2017-05-04 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* gcc.target/i386/pr57655.c: Replace absolute line numbers.
* gcc.target/i386/pr68657.c: Same.
* gcc.target/i386/pr69255-1.c: Same.
* gcc.target/i386/pr69255-2.c: Same.
* gcc.target/i386/pr69255-3.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr57655.c
trunk/gcc/testsuite/gcc.target/i386/pr68657.c
trunk/gcc/testsuite/gcc.target/i386/pr69255-1.c
trunk/gcc/testsuite/gcc.target/i386/pr69255-2.c
trunk/gcc/testsuite/gcc.target/i386/pr69255-3.c
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Subject: [Bug c++/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Thu, 04 May 2017 07:55:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, cddce leaves us with free (_11) and the def of _11 removed. _11 was
Deleting LHS of call: _11 = strdup (&d);
so caused by
2017-04-29 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR tree-optimization/79697
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Check if callee
is BUILT_IN_STRDUP, BUILT_IN_STRNDUP, BUILT_IN_REALLOC.
(propagate_necessity): Check if def_callee is BUILT_IN_STRDUP or
BUILT_IN_STRNDUP.
* gimple-fold.c (gimple_fold_builtin_realloc): New function.
(gimple_fold_builtin): Call gimple_fold_builtin_realloc.
which failed to update BUILT_IN_FREE handling properly.
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu May 4 07:55:11 2017
New Revision: 247580
URL: https://gcc.gnu.org/viewcvs?rev=247580&root=gcc&view=rev
Log:
Replace absolute line numbers in g++.dg/warn
2017-05-04 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* g++.dg/warn/Wstrict-aliasing-float-ref-int-obj.C: Replace absolute
line numbers.
* g++.dg/warn/miss-format-1.C: Same.
* g++.dg/warn/overflow-warn-1.C: Same.
* g++.dg/warn/overflow-warn-3.C: Same.
* g++.dg/warn/overflow-warn-4.C: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-float-ref-int-obj.C
trunk/gcc/testsuite/g++.dg/warn/miss-format-1.C
trunk/gcc/testsuite/g++.dg/warn/overflow-warn-1.C
trunk/gcc/testsuite/g++.dg/warn/overflow-warn-3.C
trunk/gcc/testsuite/g++.dg/warn/overflow-warn-4.C
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Subject: [Bug testsuite/80611] [8 regression] test case gfortran.dg/coarray_lock_7.f90 fails starting with r247495
Date: Thu, 04 May 2017 08:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
CC| |burnus at gcc dot gnu.org,
| |vehre at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, this testcase is really weird as it completely lacks a comment what we
are supposed to look for.
CCing coarray authors to update (and sanity check the new IL).
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
Date: Thu, 04 May 2017 08:41:00 -0000
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
106 testcases remaining.
[ Or 94, if we ignore i386/avx-* (see PR80606). ]
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Subject: [Bug tree-optimization/80620] [8 Regression] gcc produces wrong code with -O3
Date: Thu, 04 May 2017 08:57:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ugh. This is really another latent issue with PRE and range-info. When
PHI-translating {bit_and_expr,a.12_17,4081116982543369} when valueizing
a.12_17 we end up with a leader for a.12_17 as {nop_expr,a.6_10} (as this is
in antic-in). We then translate that as {nop_expr,a.0_1} for which we have
a.4_4 as "representative" -- but this has range-info that isn't valid in
the context we are looking at, when we the simplify using match.pd we use
that range-info and BOOM!.
The rev. in question just made this more likely to trigger (previously
only match.pd simplifications to constants were considered).
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 10:33:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-562537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 10:33:22 2017
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Subject: [Bug target/69460] ARM Cortex M0 produces suboptimal code vs Cortex M3
Date: Thu, 04 May 2017 10:36:00 -0000
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--- Comment #6 from strntydog at gmail dot com ---
I have built GCC 7.1.0 and have tested this optimization bug against that. It
persists. Further, the new target cortx-m23 is affected by the bug, exactly
the same as Cortex M0/M0+ and M1
The new cortex-m33 target behaves the same as the cortex-m3, in that it
produces legal code for the cortex-m23/m0/m0+/m1 but it is much better
optimised.
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Subject: [Bug tree-optimization/80612] [7/8 Regression] ICE in get_range_info, at tree-ssanames.c:375
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu May 4 10:35:58 2017
New Revision: 247586
URL: https://gcc.gnu.org/viewcvs?rev=247586&root=gcc&view=rev
Log:
PR tree-optimization/80612
* calls.c (get_size_range): Check for INTEGRAL_TYPE_P.
* gcc.dg/torture/pr80612.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr80612.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/80612] [7 Regression] ICE in get_range_info, at tree-ssanames.c:375
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] ICE in |[7 Regression] ICE in
|get_range_info, at |get_range_info, at
|tree-ssanames.c:375 |tree-ssanames.c:375
--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug c++/80614] [7/8 Regression] Bad mangling for noexcept abominable function types
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Bisection points to r241958 but that is nonsense, so I suspect r241944.
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Subject: [Bug c++/80614] [7/8 Regression] Bad mangling for noexcept abominable function types
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80614
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #2)
> Bisection points to r241958 but that is nonsense, so I suspect r241944.
Yes that would have been my guess.
>From gcc-bugs-return-562542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 11:30:04 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80624] New: char_traits<char16_t>::eof() doesn't meet requirements
Date: Thu, 04 May 2017 11:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80624
Bug ID: 80624
Summary: char_traits<char16_t>::eof() doesn't meet requirements
Product: gcc
Version: 8.0
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#include <string>
using u16_traits = std::char_traits<char16_t>;
constexpr u16_traits::char_type c = u'\uFFFF';
constexpr u16_traits::int_type e = u16_traits::eof();
static_assert( u16_traits::eq_int_type(e, c) == false, "eof() is correct" );
[char.traits.require] says eof() return "a value e such that
X::eq_int_type(e,X::to_int_type(c)) is false for all values c."
Despite being a noncharacter, u'\uFFFF' is a valid code point, see
http://www.unicode.org/faq/private_use.html#nonchar7 and
http://www.unicode.org/faq/private_use.html#nonchar8
This means there's no way to tell if std::ostream<char16_t>::put(u'\uFFFF') is
successful, because it returns to_int_type(u'\uFFFF') on success and returns
eof() on failure, which compares equal.
This might be fixable by making to_int_type(eof()) return u'\uFFFD' as
suggested by the FAQ linked to above.
>From gcc-bugs-return-562543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 11:34:17 2017
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Subject: [Bug libstdc++/80624] char_traits<char16_t>::eof() doesn't meet requirements
Date: Thu, 04 May 2017 11:44:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-04
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-562544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 11:44:10 2017
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Thu, 04 May 2017 12:05:00 -0000
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--- Comment #7 from prathamesh3492 at gcc dot gnu.org ---
Created attachment 41313
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41313&action=edit
untested fix
Hi,
The issue can be reproduced with following test-case:
char f(void)
{
char *a();
void bar(char *);
char d = *a();
char *p = __builtin_strdup (&d);
__builtin_free (p);
bar (&d);
}
cddce1 marks the call to __builtin_strdup as necessary:
marking necessary through .MEM_6 stmt p_7 = __builtin_strdup (&d);
and since p_7 doesn't get added to worklist in propagate_necessity
because it's used only within free(), it's treated as "dead"
and wrongly gets released.
The patch fixes that by adding strdup/strndup in corresponding condition
in eliminate_unnecessary_stmts.
I am not sure though why call to strdup is marked necessary.
I suppose it's safe to remove calls to strdup and free in above case since
strdup won't modify d ?
Another issue I found was that my patch failed to remove multiple calls to
strdup:
char *f(char **tt)
{
char *t = *tt;
char *p;
p = __builtin_strdup (t);
p = __builtin_strdup (t);
return p;
}
That's fixed in patch by adding strdup/strndup to another corresponding
condition in propagate_necessity
so that only one instance of strdup would be kept.
Validation in progress, will post it to the list if it passes.
Thanks,
Prathamesh
>From gcc-bugs-return-562545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:05:58 2017
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80625] New: gcc fails to notice strdup does not modify it's argument
Date: Thu, 04 May 2017 12:15:00 -0000
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Bug ID: 80625
Summary: gcc fails to notice strdup does not modify it's
argument
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Hi,
While working on PR80613, I came up with following test-case:
int f(char *s)
{
void foo(char *);
*s = 'a';
char *p = __builtin_strdup (s);
foo (p);
return *s;
}
I assume return *s could be safely replaced by return 97 since strdup will
not modify s ? Or am I mistaken ?
Thanks,
Prathamesh
>From gcc-bugs-return-562546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:15:45 2017
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From: "steven at uplinklabs dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/80626] New: Ada x32 multilib build failure for a-cfinve.ads
Date: Thu, 04 May 2017 12:16:00 -0000
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Bug ID: 80626
Summary: Ada x32 multilib build failure for a-cfinve.ads
Product: gcc
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I'm sure this would be trivial to fix if I knew any Ada at all, but I've run
into this build failure for GCC 7.1.0 when built with
--with-multilib=m32,m64,mx32 for x86_64.
make[9]: Entering directory
'/home/steven/gcc-multilib/src/gcc-build/gcc/ada/rts_x32'
[...]
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 a-cfinve.adb -o
a-cfinve.o
a-cfinve.ads:245:04: warning: in instantiation at a-coboho.adb:55
a-cfinve.ads:245:04: warning: types for unchecked conversion have different
sizes
make[9]: *** [../gcc-interface/Makefile:296: a-cfinve.o] Error 1
Any ideas?
>From gcc-bugs-return-562547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:16:54 2017
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Subject: [Bug ada/80626] Ada x32 multilib build failure for a-cfinve.ads
Date: Thu, 04 May 2017 12:17:00 -0000
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--- Comment #1 from Steven Noonan <steven at uplinklabs dot net> ---
I configured with these flags, if they're needed for repro:
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://www.uplinklabs.net/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --disable-libssp
--disable-libstdcxx-pch --disable-libunwind-exceptions --disable-werror
--enable-checking=release --enable-clocale=gnu --enable-__cxa_atexit
--enable-gnu-indirect-function --enable-gnu-unique-object
--enable-install-libiberty --enable-libmpx --enable-linker-build-id
--enable-lto --enable-multilib --enable-plugin --enable-shared
--enable-threads=posix --with-isl --with-linker-hash-style=gnu
--with-multilib-list=m32,m64,mx32 --with-system-zlib
>From gcc-bugs-return-562548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:17:35 2017
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From: "tomas_paukrt at conel dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80627] New: The Dart is crashing when glibc is compiled with arch armv7-a
Date: Thu, 04 May 2017 12:28:00 -0000
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Bug ID: 80627
Summary: The Dart is crashing when glibc is compiled with arch
armv7-a
Product: gcc
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I have found out that the Dart (https://www.dartlang.org/) is occasionally
crashing when glibc 2.25 is cross-compiled with options "--with-arch=armv7-a
--with-tune=cortex-a8 --with-fpu=vfpv3 --with-float=softfp". I have tested GCC
4.9.4, 5.4.0, 6.3.0 and 7.1.0 and all these versions produced "libc.so.6" that
does not work with the Dart. When I change option "with-arch" to "armv6" then
cross-compiled "libc.so.6" works with the Dart.
This is output of the Dart when running on system with "libc.so.6" compiled for
arch "armv7-a":
Dumping native stack trace for thread 530
[0x008cf920] Unknown symbol
[0x008cf920] Unknown symbol
-- End of DumpStackTrace
Aborted
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 12:30:00 -0000
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--- Comment #2 from S. Davis Herring <herring at lanl dot gov> ---
So sorry. For whatever reason, copy/paste works for me thence...
#include<utility>
#include<cstdlib>
#include<unistd.h>
struct A { // vaguely unique_ptr-like
void *p;
A(A &&a) : p(a.release()) {}
~A() {if(p) std::free(p);} // not that you can't free(nullptr)
void* release() {return std::exchange(p,nullptr);}
void swap(A &a) {std::swap(p,a.p);}
A& operator=(A &&a) {A(std::move(a)).swap(*this); return *this;}
};
void disassemble_me(A &a,A &b) {std::swap(a,b);}
int main() {
return !!execlp("cat","cat","prog.s",static_cast<const char*>(0));
}
>From gcc-bugs-return-562550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:30:56 2017
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 12:40:00 -0000
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--- Comment #3 from S. Davis Herring <herring at lanl dot gov> ---
Created attachment 41314
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41314&action=edit
bad assembly test case
>From gcc-bugs-return-562551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:40:14 2017
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Subject: [Bug tree-optimization/80625] gcc fails to notice strdup does not modify it's argument
Date: Thu, 04 May 2017 12:48:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
s might be a global variable, that foo modifies.
>From gcc-bugs-return-562552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:48:48 2017
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Subject: [Bug tree-optimization/80625] gcc fails to notice strdup does not modify it's argument
Date: Thu, 04 May 2017 12:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Is handled fine.
>From gcc-bugs-return-562553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:51:10 2017
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 12:54:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
MEM[(void * &)a_2(D)] = 0B;
MEM[(void * &)b_3(D)] = 0B;
_7 = MEM[(void * &)a_2(D)];
Indeed.
>From gcc-bugs-return-562555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:56:37 2017
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Subject: [Bug ada/80626] Ada x32 multilib build failure for a-cfinve.ads
Date: Thu, 04 May 2017 12:56:00 -0000
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--- Comment #2 from Steven Noonan <steven at uplinklabs dot net> ---
It looks like this is just the first of several files with that build issue. If
I build with 'make -k' I see several others fail with the same warning, e.g.:
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 g-allein.ads -o
g-allein.o
g-allein.ads:183:04: warning: types for unchecked conversion have different
sizes
g-allein.ads:185:04: warning: types for unchecked conversion have different
sizes
g-allein.ads:187:04: warning: types for unchecked conversion have different
sizes
g-allein.ads:189:04: warning: types for unchecked conversion have different
sizes
g-allein.ads:191:04: warning: types for unchecked conversion have different
sizes
[... many more in the same file ...]
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 s-wwdenu.adb -o
s-wwdenu.o
s-wwdenu.adb:55:07: warning: types for unchecked conversion have different
sizes
s-wwdenu.adb:94:07: warning: types for unchecked conversion have different
sizes
s-wwdenu.adb:133:07: warning: types for unchecked conversion have different
sizes
s-wwdenu.adb:172:07: warning: types for unchecked conversion have different
sizes
s-wwdenu.adb:211:07: warning: types for unchecked conversion have different
sizes
s-wwdenu.adb:250:07: warning: types for unchecked conversion have different
sizes
And several files fail with a different warning:
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 a-dispat.adb -o
a-dispat.o
s-osinte.ads:608:07: size for "Address" too small, minimum allowed is 64
make[9]: *** [../gcc-interface/Makefile:296: a-dispat.o] Error 1
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 a-dynpri.adb -o
a-dynpri.o
s-osinte.ads:608:07: size for "Address" too small, minimum allowed is 64
make[9]: *** [../gcc-interface/Makefile:296: a-dynpri.o] Error 1
/home/steven/gcc-multilib/src/gcc-build/./gcc/xgcc
-B/home/steven/gcc-multilib/src/gcc-build/./gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem
/usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include
-c -g -O2 -mx32 -fpic -W -Wall -gnatpg -nostdinc -mx32 a-interr.adb -o
a-interr.o
s-osinte.ads:608:07: size for "Address" too small, minimum allowed is 64
make[9]: *** [../gcc-interface/Makefile:296: a-interr.o] Error 1
>From gcc-bugs-return-562554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:54:38 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/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 12:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we end up with
void disassemble_me(A&, A&) (struct A & a, struct A & b)
{
void * __old_val;
void * __old_val;
void * _7;
void * _8;
<bb 2> [100.00%]:
__old_val_5 = MEM[(void * &)a_2(D)];
MEM[(void * &)a_2(D)] = 0B;
__old_val_6 = MEM[(void * &)b_3(D)];
MEM[(void * &)b_3(D)] = 0B;
_7 = MEM[(void * &)a_2(D)];
MEM[(void * &)a_2(D)] = __old_val_6;
if (_7 != 0B)
goto <bb 3>; [53.47%]
else
goto <bb 4>; [46.53%]
<bb 3> [53.47%]:
free (_7);
...
which shows this issue. I believe there's a duplicate PR for this somewhere...
(I even remember writing a patch for this).
>From gcc-bugs-return-562557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 12:57:37 2017
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Subject: [Bug tree-optimization/80625] gcc fails to notice strdup does not modify it's argument
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--- Comment #3 from prathamesh3492 at gcc dot gnu.org ---
Ah indeed, sorry for the noise.
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 12:57:00 -0000
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--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
The simplest fix is the following, but I'll move the whole test a bit
earlier in a patch to the mailing list:
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c
index 1606573aead..79ca1666c15 100644
--- a/gcc/tree-sra.c
+++ b/gcc/tree-sra.c
@@ -2581,8 +2581,10 @@ propagate_subaccesses_across_link (struct access *lacc,
struct access *racc)
/* IF the LHS is still not marked as being written to, we only need to do so
if the RHS at this level actually was. */
- if (!lacc->grp_write &&
- (racc->grp_write || TREE_CODE (racc->base) == PARM_DECL))
+ if (!lacc->grp_write
+ && (racc->grp_write
+ || TREE_CODE (racc->base) == PARM_DECL
+ || constant_decl_p (racc->base)))
{
lacc->grp_write = true;
ret = true;
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
Date: Thu, 04 May 2017 13:13:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
C testcase:
int foo (int *p, int *q)
{
*p = 1;
*q = 1;
return *p;
}
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From: "georgerim at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/80628] New: gcc 7.1.0 produces duplicate entries in .debug_gnu_pubtypes table
Date: Thu, 04 May 2017 13:16:00 -0000
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Bug ID: 80628
Summary: gcc 7.1.0 produces duplicate entries in
.debug_gnu_pubtypes table
Product: gcc
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Created attachment 41315
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41315&action=edit
sample object
I found this when builded LLVM llc binary using gcc 5.4.1 and -ggnu-pubnames
-gsplit-dwarf.
And also checked that latest available released version 7.1.0 is also affected.
gcc produces duplicate entries in .debug_gnu_pubtypes section, ex:
UnifyFunctionExitNodes.cpp.o has:
0x0000ac07 EXTERNAL TYPE "std::success_type<void*>"
0x0000ac07 EXTERNAL TYPE "std::success_type<void*>"
clang produces single entry for the same:
0x0000d291 EXTERNAL TYPE "std::__success_type<void *>"
This entries can be used by linker to produce .gdb_index section.
And gold currently filters such duplicates out.
Though it still looks useless and excessive to have them in output.
Object file produces by gcc 7.1.0 is attached.
Below is a demonstration of duplication.
>> strings -a UnifyFunctionExitNodes.cpp.o |grep "GCC: ("
GCC: (GNU) 7.1.0
>> objdump UnifyFunctionExitNodes.cpp.o --dwarf=pubtypes
Contents of the .debug_gnu_pubtypes section:
...
1ea15 g,type llvm::InsertValueInst
1ea15 g,type llvm::InsertValueInst
1e47f g,type llvm::SelectInst
1e47f g,type llvm::SelectInst
1de70 g,type llvm::FuncletPadInst
1de70 g,type llvm::FuncletPadInst
151bc g,type llvm::PassRegistrationListener
151bc g,type llvm::PassRegistrationListener
>From gcc-bugs-return-562560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 13:16:17 2017
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From: "matt at godbolt dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/80629] New: Missing .loc for a function in the presence of -O2
Date: Thu, 04 May 2017 13:19:00 -0000
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Bug ID: 80629
Summary: Missing .loc for a function in the presence of -O2
Product: gcc
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Firstly; I appreciate how tricky it is to keep track of debug information in
the presence of optimization and inlining, but I wonder if there's something
specific happening in this case. This is filed against 7.1, but previous
versions had slightly different, but similar issues.
In the following code snippet:
---cut---
#include <memory>
int callByValue(std::unique_ptr<int> a) { return *a; } // comment me out - see
below
int callByRef(std::unique_ptr<int> && a) { return *a; }
int callItByRef(std::unique_ptr<int> a) {
return callByRef(std::move(a));
}
---cut---
Compiled and output thus:
g++ foo.cc -O2 -S -o - -g | c++filt | head -50
One can see that the final function "callItByRef" doesn't have a `.loc`
anywhere in it to tie it to the source.
At -O1 the locations are output correctly.
Interestingly, commenting out the (unused) callByValue function causes the
callItByRef to gain debug information, which makes me wonder if there's a bug
here rather than a difficulty in tracking debug information per se.
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Subject: [Bug debug/80629] Missing .loc for a function in the presence of -O2
Date: Thu, 04 May 2017 13:27:00 -0000
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--- Comment #1 from Matt Godbolt <matt at godbolt dot org> ---
This bug is noticeable in Compiler Explorer: https://godbolt.org/g/scFj7A for
example; the function is not colourised as CE uses the .locs to track how the
source lines map to asm. One can also see how the bug has changed between
compiler revisions, in the 5.x and 6.x series it was the first function that
suffered the loc loss, and in 4.9.4 there's no such issue. (the older compilers
need the addition of the -std=c++0x flag)
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From: "tamas.bela.feher at ipp dot mpg.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80554] [f08] variable redefinition in submodule
Date: Thu, 04 May 2017 14:37:00 -0000
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--- Comment #3 from Tamas Bela Feher <tamas.bela.feher at ipp dot mpg.de> ---
Dear Dominique,
Thank you for looking into the problem.
> Why do you want to use such constructs?
I was refactoring and splitting large modules into submodules when I
accidentally run into this problems. I could get around by simply
renaming the variables. I also agree with you, that using such
constructs is asking for trouble.
The main question is whether the standard forbids this construct or not.
If it does not, then the compiler should not give any error message. A
warning could be given if you really deem it dangerous.
> How do you parse [...] ?
If I understood correctly, section 16.3.1 establishes that
variable i belongs to class (1) of local identifiers, and such
identifiers shall not be the same as a global identifier.
Further in section 16.3.1 we can find that
"Within its scope, a local identifier of one class shall not be the same
as another local identifier of the same class."
None of these restrictions apply. The submodule (as a program unit)
should be considered as a separate scoping unit:
"1.3.124 scoping unit
BLOCK construct, derived-type definition, interface body, program unit,
subprogram, excluding all nested scoping units in it"
"Note 2.4
A submodule has access to entities in its parent module or submodule by
host association."
I did not find any specific restrictions for host association in case of
submodules, therefore I would use the general rule:
"16.5.1.4 Host association
[...]
A name that appears in the scoping unit as
[...]
(2) an object-name in an entity-decl [...]
is a local identifier in the scoping unit and any entity of the host
that has this as its nongeneric name is inaccessible by that name by
host association."
Considering all the above, I would interpret the attached code (repeated here)
the following way:
1 module M
2 implicit none
3 integer :: i = 0
4 interface
5 module subroutine write_i()
6 end subroutine
7 end interface
8 end module
9
10 submodule (M) S
11 integer :: i = 137
12 contains
13 module subroutine write_i()
14 write (*,*) i
15 end subroutine
16 end submodule
Line 3 declares local variable i in the scoping unit of module M.
Line 11 declares a local variable with the same name in the scoping unit of
submodule S (which is separate from the scoping unit of M).
The variable i in line 14 refers to the local variable from the scoping unit of
S. The program is correct, the error message that GFortran gives is incorrect.
I have also tried a recent version of IBM's XL-Fortran compiler (15.1.5) and it
compiles the code without any error message.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/69604] ICE in gfc_add_modify_loc, at fortran/trans.c:159
Date: Thu, 04 May 2017 14:41:00 -0000
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--- Comment #12 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Harald Anlauf from comment #11)
> While reducing PR 78290, I found another example giving a similar traceback:
>
> % gfc-trunk gfcbug136.f90
[...]
While checking the status of the example in comment #11,
I found it does no longer crash with the 7-release.
However, the testcases in the previous comments still fail.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80620] [8 Regression] gcc produces wrong code with -O3
Date: Thu, 04 May 2017 14:47:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Now needs sth before r247596 to reproduce.
The whole
PRE_EXPR_NARY (expr) = newnary;
constant = fully_constant_expression (expr);
PRE_EXPR_NARY (expr) = nary;
if (constant != expr)
{
/* For non-CONSTANTs we have to make sure we can eventually
insert the expression. Which means we need to have a
leader for it. */
if (constant->kind != CONSTANT)
{
/* Do not allow simplifications to non-constants over
backedges as this will likely result in a loop PHI node
to be inserted and increased register pressure.
See PR77498 - this avoids doing predcoms work in
a less efficient way. */
if (find_edge (pred, phiblock)->flags & EDGE_DFS_BACK)
;
else
{
unsigned value_id = get_expr_value_id (constant);
constant = find_leader_in_sets (value_id, set1, set2,
AVAIL_OUT (pred));
if (constant)
return constant;
mitigates the fact that
tree result = vn_nary_op_lookup_pieces (newnary->length,
newnary->opcode,
newnary->type,
&newnary->op[0],
&nary);
if (result && is_gimple_min_invariant (result))
return get_or_alloc_expr_for_constant (result);
doesn't allow SSA name result to prevail here. That is vn_nary_simplify
also just looks up the expr now even if not simplified. It also gets
fed leaders which are not necessarily final values and thus do not have
range-info cleared.
The SCCVN band-aid to clear SSA_NAME_RANGE_INFO doesn't apply here because
nothing is value-numbered to a.4_4 besides itself. But phi-translation
effectively value-numbers an expression to it.
>From gcc-bugs-return-562565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 14:47:16 2017
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Subject: [Bug tree-optimization/80618] [8 regression] test case gcc.dg/pr50310-2.c fails with ICE starting with 247544
Date: Thu, 04 May 2017 14:54:00 -0000
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--- Comment #4 from seurer at gcc dot gnu.org ---
Yup, you were right.
Compiling with r247543:
seurer@genoa:~/gcc/build/gcc-test$ /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O3 -lm -o
./pr50310-2.exe
And adding --param vect-max-peeling-for-alignment=0
seurer@genoa:~/gcc/build/gcc-test$ /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O3 -lm -o
./pr50310-2.exe --param vect-max-peeling-for-alignment=0
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c: In function 'main':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: error:
unrecognizable insn:
(insn 361 360 176 2 (set (reg:V2DF 342)
(not:V2DF (ior:V2DF (reg:V2DF 470)
(reg:V2DF 471))))
"/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c":30 -1
(nil))
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/pr50310-2.c:47:1: internal
compiler error: in extract_insn, at recog.c:2311
0x108ab353 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/seurer/gcc/gcc-test/gcc/rtl-error.c:108
0x108ab3b7 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/seurer/gcc/gcc-test/gcc/rtl-error.c:116
0x108701d7 extract_insn(rtx_insn*)
/home/seurer/gcc/gcc-test/gcc/recog.c:2311
0x1120fe63 decompose_multiword_subregs
/home/seurer/gcc/gcc-test/gcc/lower-subreg.c:1467
0x1121150b execute
/home/seurer/gcc/gcc-test/gcc/lower-subreg.c:1734
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++/80587] Incorrect type from outer scope inside lambda under some conditions
Date: Thu, 04 May 2017 15:09:00 -0000
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--- Comment #1 from jasonr@3db-labs.com ---
I neglected to include the preprocessed source file. It is too large to attach
here, so I posted it at:
https://gist.github.com/otherjason/9f50d3f36207ea4b40bb805f6c710304
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Subject: [Bug tree-optimization/80574] GCC fail to optimize nested ternary
Date: Thu, 04 May 2017 15:22:00 -0000
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SztfG at yandex dot ru changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |SztfG at yandex dot ru
--- Comment #6 from SztfG at yandex dot ru ---
Created attachment 41316
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41316&action=edit
some benchmark with macro stuff and std::max
Well, maybe this is also not related to this issue, but here is some benchmark,
and std::max is slower than macro
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 15:32:00 -0000
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--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Martin Jambor from comment #6)
> The simplest fix is the following, but I'll move the whole test a bit
> earlier in a patch to the mailing list:
Which is now posted at
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00306.html
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Subject: [Bug fortran/70071] ICE on wrong usage of a subscript triplet
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--- Comment #4 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Harald Anlauf from comment #3)
The patch in comment #3 regtests cleanly on i686-pc-linux-gnu
and has been posted here:
https://gcc.gnu.org/ml/fortran/2017-05/msg00010.html
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00312.html
Whoever wants to take it and adapt to 8-trunk, 7-release (?).
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Subject: [Bug tree-optimization/80457] vectorizable_condition does not update the vectorizer cost model
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK, will do (probably next week after things hopefully unstack a bit). Thanks!
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Subject: [Bug tree-optimization/80617] [missed optimization] Storing constant in two possibly-aliased locations
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--- Comment #7 from S. Davis Herring <herring at lanl dot gov> ---
We can extend the C test case (thanks for that) with a shared, non-constant
value (and more savings by having dead code as in the original C++ example):
void foo(int *p,int *q,int x) {
*q=*p=x;
if(*p!=x) abort(); /* dead */
}
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Subject: [Bug target/80627] The Dart is crashing when glibc is compiled with arch armv7-a
Date: Thu, 04 May 2017 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80627
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is not a usable bug report. We cannot provide a debugging service for
you, so you are going to have to narrow the problem down to something usable.
See https://gcc.gnu.org/bugs/ for details of the information we would need.
>From gcc-bugs-return-562572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 16:19:59 2017
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Thu, 04 May 2017 16:28:00 -0000
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Thu May 4 16:19:20 2017
New Revision: 247604
URL: https://gcc.gnu.org/viewcvs?rev=247604&root=gcc&view=rev
Log:
[PR 80622] Treat const pools as initialized in SRA
2017-05-04 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/80622
* tree-sra.c (comes_initialized_p): New function.
(build_accesses_from_assign): Only set write lazily when
comes_initialized_p is false.
(analyze_access_subtree): Use comes_initialized_p.
(propagate_subaccesses_across_link): Assert !comes_initialized_p
instead of testing for PARM_DECL.
testsuite/
* gcc.dg/tree-ssa/pr80622.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr80622.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-sra.c
>From gcc-bugs-return-562574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 16:28:51 2017
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Subject: [Bug target/80627] The Dart is crashing when glibc is compiled with arch armv7-a
Date: Thu, 04 May 2017 16:53:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|FIXED |INVALID
>From gcc-bugs-return-562575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 16:53:48 2017
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From: "tomas_paukrt at conel dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80627] The Dart is crashing when glibc is compiled with arch armv7-a
Date: Thu, 04 May 2017 17:01:00 -0000
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tomas_paukrt at conel dot cz changed:
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----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |---
--- Comment #2 from tomas_paukrt at conel dot cz ---
The GCC, binutils and glibc were compiled using our toolchain builder
(https://bitbucket.org/bbsmartworx/tcbuilder), so you can find all information
about versions, options, etc. there.
The Dart SDK was built using instructions from here:
https://github.com/dart-lang/sdk/wiki/Building-Dart-SDK-for-ARM-processors. I
can provide final binary if you want to, but it is quite large.
This issue can be reproduced easily by executing the "dart" binary several
times.
I have tested it on embedded system with AM3352 CPU.
>From gcc-bugs-return-562576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 17:01:41 2017
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Subject: [Bug c++/67650] undef reference with -fdevirtualize
Date: Thu, 04 May 2017 17:03:00 -0000
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--- Comment #15 from Vincent <vincent.lextrait at gmail dot com> ---
Still there in 7.1.0.
>From gcc-bugs-return-562577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 17:03:58 2017
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Subject: [Bug target/80627] The Dart is crashing when glibc is compiled with arch armv7-a
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
You obviously haven't read the page I just pointed you to. See explicitly the
section "what we do not want".
>From gcc-bugs-return-562578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 17:40:45 2017
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Thu, 04 May 2017 17:42:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 17:40:05 2017
New Revision: 247607
URL: https://gcc.gnu.org/viewcvs?rev=247607&root=gcc&view=rev
Log:
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/c-family/ChangeLog:
PR translation/80280
* c-attribs.c (handle_alias_ifunc_attribute): Quote a %D directive.
(handle_weakref_attribute): Same.
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/ChangeLog:
PR translation/80280
* config/i386/i386.c (ix86_function_versions): Quote a %D directive.
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/cp/ChangeLog:
PR translation/80280
* call.c (print_z_candidate): Add missing quoting to %D and other
like directives.
(build_op_call_1): Same.
* constraint.cc (diagnose_check_constraint): Same.
* mangle.c (mangle_decl): Same.
* name-lookup.c (cp_binding_level_debug): Same.
(set_decl_namespace): Same.
* parser.c (cp_parser_tx_qualifier_opt): Same.
* pt.c (print_candidates_1): Same.
(check_template_variable): Same.
(tsubst_default_argument): Same.
(most_specialized_partial_spec): Same.
* semantics.c (omp_reduction_lookup): Same.
* tree.c (check_abi_tag_redeclaration): Same.
* typeck.c (comptypes): Same.
* typeck2.c (abstract_virtuals_error_sfinae): Same.
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/ChangeLog:
PR translation/80280
* builtins.c (expand_builtin_object_size): Add missing quoting to
%D and like directives.
* hsa-gen.c (hsa_type_for_scalar_tree_type): Same.
(hsa_type_for_tree_type): Same.
(verify_function_arguments): Same.
* symtab.c (symbol_table::change_decl_assembler_name): Same.
* varasm.c (get_section): Same.
(mark_weak): Same.
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/objc/ChangeLog:
PR translation/80280
* objc-gnu-runtime-abi-01.c (objc_eh_runtime_type): Add missing
quoting to directives.
* objc-next-runtime-abi-01.c (objc_eh_runtime_type): Ditto.
* objc-next-runtime-abi-02.c (next_runtime_02_eh_type): Ditto.
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/testsuite/ChangeLog:
PR translation/80280
* g++.dg/abi/Wabi-2-3.C: Adjust.
* g++.dg/abi/Wabi-3-2.C: Ditto.
* g++.dg/lookup/using17.C: Ditto.
* gcc.dg/format/gcc_diag-1.c (foo): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-attribs.c
trunk/gcc/config/i386/i386.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/constraint.cc
trunk/gcc/cp/mangle.c
trunk/gcc/cp/name-lookup.c
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
trunk/gcc/cp/typeck2.c
trunk/gcc/hsa-gen.c
trunk/gcc/objc/ChangeLog
trunk/gcc/objc/objc-gnu-runtime-abi-01.c
trunk/gcc/objc/objc-next-runtime-abi-01.c
trunk/gcc/objc/objc-next-runtime-abi-02.c
trunk/gcc/symtab.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/abi/Wabi-2-3.C
trunk/gcc/testsuite/g++.dg/abi/Wabi-3-2.C
trunk/gcc/testsuite/g++.dg/lookup/using17.C
trunk/gcc/testsuite/gcc.dg/format/gcc_diag-1.c
trunk/gcc/varasm.c
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
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--- Comment #8 from coypu <coypu at sdf dot org> ---
Created attachment 41317
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41317&action=edit
Unbreak NetBSD following r243219
This patch works for me.
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80630] New: gcc fails to compile constexpr with -O0/-O1
Date: Thu, 04 May 2017 18:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80630
Bug ID: 80630
Summary: gcc fails to compile constexpr with -O0/-O1
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
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Created attachment 41318
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41318&action=edit
Reproducer.
gcc fails to compile constexpr at -O0 and -O2 with -std=c++11 and -std=c++14.
Everything works fine with -std=c++17.
Reproducer:
>$ cat repr.cpp
#include <iostream>
#include <utility>
template<typename T>
void foo() {
std::cout << T::debug_typeid << std::endl;
std::make_pair(T::debug_typeid, T::debug_typeid);
}
struct A {
static constexpr uint32_t debug_typeid = 1;
};
int main () {
foo<A>();
}
Error:
>$ g++ -std=c++11 repr.cpp -O0 ; ./a.out
/tmp/cckPqG1z.o: In function `void foo<A>()':
repr.cpp:(.text._Z3fooI1AEvv[_Z3fooI1AEvv]+0x21): undefined reference to
`A::debug_typeid'
repr.cpp:(.text._Z3fooI1AEvv[_Z3fooI1AEvv]+0x26): undefined reference to
`A::debug_typeid'
collect2: error: ld returned 1 exit status
GCC revision:247564
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80630] gcc fails to compile constexpr with -O0/-O1
Date: Thu, 04 May 2017 18:28:00 -0000
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Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> ---
Missed out-of-line definition for A::debug_typeid:
constexpr uint32_t A::debug_typeid;
>From gcc-bugs-return-562582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 18:28:18 2017
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Thu, 04 May 2017 18:46:00 -0000
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--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to coypu from comment #8)
> Created attachment 41317 [details]
> Unbreak NetBSD following r243219
>
> This patch works for me.
This may break Linux. You may want to investigate if this approach:
commit 6e6c7fc1e15525a10f48d4f5ac2edd853e2f5cb7
Author: nsz <nsz@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Nov 11 17:31:07 2016 +0000
[i386][musl] Add cpuinfo to static libgcc only on *-musl*
The __cpu_indicator_init and __cpu_model symbols are not safe to use
from shared libgcc_s.so from ifunc resolvers, so since gcc-6, only
the definitions from static libgcc.a are used, however the symbols
are kept in libgcc_s as well for backward compatibility (with
appropriate symbol version). On targets without such backward
compatibility concern add cpuinfo to the static library only (this
avoids running the ctor, reduces libgcc_s size and elf abi concerns
about the versioned symbols).
works for you.
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80484] Three syntax errors involving derived-type I/O
Date: Thu, 04 May 2017 18:49:00 -0000
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--- Comment #15 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Thu May 4 18:45:50 2017
New Revision: 247615
URL: https://gcc.gnu.org/viewcvs?rev=247615&root=gcc&view=rev
Log:
2017-05-04 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk.
PR fortran/80484
* io.c (format_lex): Check for '/' and set token to FMT_SLASH.
(check_format): Move FMT_DT checking code to data_desc section.
* module.c (gfc_match_use): Include the case of INTERFACE_DTIO.
Backport from mainline
PR fortran/80484
* gfortran.dg/dtio_29.f03: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/dtio_29.f03
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/io.c
branches/gcc-7-branch/gcc/fortran/module.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80484] Three syntax errors involving derived-type I/O
Date: Thu, 04 May 2017 18:57:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on 7.1.1 and closing
>From gcc-bugs-return-562585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 18:57:02 2017
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From: "tomas_paukrt at conel dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80627] The Dart is crashing when glibc is compiled with arch armv7-a
Date: Thu, 04 May 2017 19:07:00 -0000
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--- Comment #4 from tomas_paukrt at conel dot cz ---
I wanted to trace this issue down to the root cause, but the Dart is quite
large project and I realy do not have time to isolate the code that triggers
this bug and fix it myself, so I just asked for help.
The core dump is quite useless as you can see:
Core was generated by `/bin/dart bin/run.dart'.
Program terminated with signal 6, Aborted.
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
I understand that you do not have such much time too, so lets close this case.
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Subject: [Bug c/80631] New: Compiling with -O3 -mavx2 gives wrong code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80631
Bug ID: 80631
Summary: Compiling with -O3 -mavx2 gives wrong code
Product: gcc
Version: 6.3.1
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Priority: P3
Component: c
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Created attachment 41319
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41319&action=edit
Preprocessed source generated by gcc -v -save-temps -O3 -mavx2 thecode.c
I ran into a problem with strange results when compiling with -O3 -mavx2 and
have been able to reduce it to the following small test code:
========================================
#include <stdio.h>
int main() {
const int N = 8;
int v[N];
for(int k = 0; k < N; k++)
v[k] = k;
v[0] = 77;
int found_index = -1;
for(int k = 0; k < N; k++) {
if(v[k] == 77)
found_index = k;
}
printf("found_index = %d\n", found_index);
}
========================================
If compiled correctly, running this code should give "found_index = 0".
When compiling it like this:
gcc -O3 -mavx2 thecode.c
then running the resulting a.out executable gives:
$ ./a.out
found_index = -1
which is wrong.
The output of "gcc -v -save-temps -O3 -mavx2 thecode.c" looks as follows:
========================================
$ gcc -v -save-temps -O3 -mavx2 thecode.c
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array
--disable-libgcj --with-isl --enable-libmpx --enable-gnu-indirect-function
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 6.3.1 20161221 (Red Hat 6.3.1-1) (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-mavx2' '-mtune=generic'
'-march=x86-64'
/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/cc1 -E -quiet -v thecode.c -mavx2
-mtune=generic -march=x86-64 -O3 -fpch-preprocess -o thecode.i
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/6.3.1/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../x86_64-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/include
/usr/local/include
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-mavx2' '-mtune=generic'
'-march=x86-64'
/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/cc1 -fpreprocessed thecode.i -quiet
-dumpbase thecode.c -mavx2 -mtune=generic -march=x86-64 -auxbase thecode -O3
-version -o thecode.s
GNU C11 (GCC) version 6.3.1 20161221 (Red Hat 6.3.1-1) (x86_64-redhat-linux)
compiled by GNU C version 6.3.1 20161221 (Red Hat 6.3.1-1), GMP version
6.1.1, MPFR version 3.1.5, MPC version 1.0.2, isl version 0.14 or 0.13
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (GCC) version 6.3.1 20161221 (Red Hat 6.3.1-1) (x86_64-redhat-linux)
compiled by GNU C version 6.3.1 20161221 (Red Hat 6.3.1-1), GMP version
6.1.1, MPFR version 3.1.5, MPC version 1.0.2, isl version 0.14 or 0.13
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 67626b9d441eed376539391e660a9413
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-mavx2' '-mtune=generic'
'-march=x86-64'
as -v --64 -o thecode.o thecode.s
GNU assembler version 2.26.1 (x86_64-redhat-linux) using BFD version version
2.26.1-1.fc25
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/:/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/6.3.1/:/usr/lib/gcc/x86_64-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/6.3.1/:/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-mavx2' '-mtune=generic'
'-march=x86-64'
/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/collect2 -plugin
/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/liblto_plugin.so
-plugin-opt=/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/lto-wrapper
-plugin-opt=-fresolution=thecode.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id
--no-add-needed --eh-frame-hdr --hash-style=gnu -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../lib64/crt1.o
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../lib64/crti.o
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/crtbegin.o
-L/usr/lib/gcc/x86_64-redhat-linux/6.3.1
-L/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../.. thecode.o
-lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
--no-as-needed /usr/lib/gcc/x86_64-redhat-linux/6.3.1/crtend.o
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../lib64/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-mavx2' '-mtune=generic'
'-march=x86-64'
========================================
I have tested this with a few different gcc versions:
gcc 4.8.3 --> OK
gcc 4.9.4 --> OK
gcc 5.3.0 --> OK
gcc 5.4.0 --> OK
gcc 6.1.0 --> WRONG
gcc 6.2.0 --> WRONG
gcc 6.3.1 --> WRONG
gcc 7.1.0 --> WRONG
I don't know what goes wrong but it seems somehow related to the beginning of
the list v in the code; if I change v[0]=77 to e.g. v[3]=77 then that gives
found_index=3 as it should, it is only v[0] that somehow is missed.
>From gcc-bugs-return-562587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:09:09 2017
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Subject: [Bug c/80631] [6/7/8 Regression] Compiling with -O3 -mavx2 gives wrong code
Date: Thu, 04 May 2017 20:09:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
CC| |alan.hayward at arm dot com,
| |jakub at gcc dot gnu.org
Target Milestone|--- |6.4
Summary|Compiling with -O3 -mavx2 |[6/7/8 Regression]
|gives wrong code |Compiling with -O3 -mavx2
| |gives wrong code
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r230297.
Note, in C
const int N = 8;
int v[N];
is a variable length array, so unnecessarily pessimizing, you need to use
#define N 8
or
enum { N = 8 };
or something similar instead for it to be a non-VLA. In C++ it is not a VLA.
But fixing that doesn't help here.
>From gcc-bugs-return-562588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:09:19 2017
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
Date: Thu, 04 May 2017 20:11:00 -0000
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TC <rs2740 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rs2740 at gmail dot com
--- Comment #4 from TC <rs2740 at gmail dot com> ---
(In reply to Eric Fiselier from comment #3)
> Here is an example of why `_Bind::operator()(...) const` must be considered
> during overload resolution even if the call wrapper itself is not const.
>
> ------------------------------
> #include <functional>
>
> struct Func {
> template <class ...Args>
> void operator()(Args&&...) = delete;
>
> template <class ...Args>
> void operator()(Args&&...) const {}
> };
>
> int main() {
> Func f;
> std::bind(f)();
> }
> -------------------------
Interesting, libstdc++ rejects this as an attempt to call a deleted function.
That seems more correct than libc++'s approach which calls the const overload.
>From gcc-bugs-return-562590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:14:12 2017
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From: "r.hl at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
Date: Thu, 04 May 2017 20:14:00 -0000
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--- Comment #5 from r.hl at gmx dot net ---
See also the discussion on Phabricator: https://reviews.llvm.org/D32824
I agree; AFAICS [func.bind.bind] is clear on this: the type of the Func
object used to call the member operator() is non-const.
On 5/4/2017 9:09 PM, rs2740 at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80564
>
> TC <rs2740 at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |rs2740 at gmail dot com
>
> --- Comment #4 from TC <rs2740 at gmail dot com> ---
> (In reply to Eric Fiselier from comment #3)
>> Here is an example of why `_Bind::operator()(...) const` must be considered
>> during overload resolution even if the call wrapper itself is not const.
>>
>> ------------------------------
>> #include <functional>
>>
>> struct Func {
>> template <class ...Args>
>> void operator()(Args&&...) = delete;
>>
>> template <class ...Args>
>> void operator()(Args&&...) const {}
>> };
>>
>> int main() {
>> Func f;
>> std::bind(f)();
>> }
>> -------------------------
> Interesting, libstdc++ rejects this as an attempt to call a deleted function.
> That seems more correct than libc++'s approach which calls the const overload.
>
>From gcc-bugs-return-562591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:14:49 2017
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Subject: [Bug c/80632] error: invalid PHI argument with -O2
Date: Thu, 04 May 2017 20:14:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
This bugs seems to have appeared between revision 247534
and 247578.
I'll have a go at reducing it.
>From gcc-bugs-return-562589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:11:25 2017
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Subject: [Bug c/80632] New: error: invalid PHI argument with -O2
Date: Thu, 04 May 2017 20:14:00 -0000
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Bug ID: 80632
Summary: error: invalid PHI argument with -O2
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Created attachment 41320
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41320&action=edit
C source code
The attached code does this with today's gcc trunk and flag -O2:
$ /home/dcb/gcc/results/bin/gcc -c -w -O2 /tmp/q.i
xlock.c: In function ‘monitor_powered_on_p’:
xlock.c:4059:1: error: invalid PHI argument
}
^
.MEM
xlock.c:4059:1: error: invalid PHI argument
.MEM
.MEM_7 = PHI <.MEM_11(2), .MEM_12(3), .MEM_13(4), .MEM(11), .MEM(10)>
xlock.c:4059:1: internal compiler error: verify_gimple failed
0xc860d2 verify_gimple_in_cfg(function*, bool)
../../trunk/gcc/tree-cfg.c:5266
0xb12976 execute_function_todo
../../trunk/gcc/passes.c:1968
0xb14f61 do_per_function
../../trunk/gcc/passes.c:1652
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Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
Date: Thu, 04 May 2017 20:16:00 -0000
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--- Comment #6 from Robert Haberlach <columbo@gmx-topmail.de> ---
(In reply to TC from comment #4)
> (In reply to Eric Fiselier from comment #3)
> > Here is an example of why `_Bind::operator()(...) const` must be considered
> > during overload resolution even if the call wrapper itself is not const.
> >
> > ------------------------------
> > #include <functional>
> >
> > struct Func {
> > template <class ...Args>
> > void operator()(Args&&...) = delete;
> >
> > template <class ...Args>
> > void operator()(Args&&...) const {}
> > };
> >
> > int main() {
> > Func f;
> > std::bind(f)();
> > }
> > -------------------------
>
> Interesting, libstdc++ rejects this as an attempt to call a deleted
> function. That seems more correct than libc++'s approach which calls the
> const overload.
See also the discussion on Phabricator: https://reviews.llvm.org/D32824
I agree. AFAICS [func.bind.bind] is clear on this: the type of the Func
object used to call the member operator() is non-const.
>From gcc-bugs-return-562593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:16:10 2017
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From: "columbo@gmx-topmail.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80564] bind on SFINAE unfriendly generic lambda
Date: Thu, 04 May 2017 20:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80564
--- Comment #7 from Robert Haberlach <columbo@gmx-topmail.de> ---
Oh, damn. "Submit only my new comment" does not what I thought it does. :-)
>From gcc-bugs-return-562594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:23:52 2017
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80633] New: [7/8 Regression] -Wstrict-aliasing false positive
Date: Thu, 04 May 2017 20:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80633
Bug ID: 80633
Summary: [7/8 Regression] -Wstrict-aliasing false positive
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Casey at Carter dot net
Target Milestone: ---
Created attachment 41321
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41321&action=edit
Repro (sorry, not library-free)
gcc 7.1.1 20170504 and 8.0.0 20170504 - but not 6.2/5.4/4.9.4 - incorrectly
diagnose this program:
#include <fstream>
extern void f(std::istream&);
std::ifstream ss;
using T = decltype(f(ss)); // warning: dereferencing type-punned pointer will
break strict-aliasing rules
when compiling with "gcc -Wstrict-aliasing -O2 -c". The diagnostic is notably
not emitted for "decltype(f(std::declval<std::ifstream&>()))".
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Subject: [Bug middle-end/79223] missing -Wstringop-overflow on a memmove overflow
Date: Thu, 04 May 2017 20:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79223
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 20:54:43 2017
New Revision: 247618
URL: https://gcc.gnu.org/viewcvs?rev=247618&root=gcc&view=rev
Log:
PR preprocessor/79214 - -Wno-system-header defeats strncat buffer overflow
warnings
PR middle-end/79222 - missing -Wstringop-overflow= on a stpcpy overflow
PR middle-end/79223 - missing -Wstringop-overflow on a memmove overflow
gcc/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* builtins.c (check_sizes): Add inlinining context and issue
warnings even when -Wno-system-headers is set.
(check_strncat_sizes): Same.
(expand_builtin_strncat): Same.
(expand_builtin_memmove): New function.
(expand_builtin_stpncpy): Same.
(expand_builtin): Handle memmove and stpncpy.
gcc/testsuite/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* gcc.dg/pr79214.c: New test.
* gcc.dg/pr79214.h: New test header.
* gcc.dg/pr79222.c: New test.
* gcc.dg/pr79223.c: New test.
* gcc.dg/pr78138.c: Adjust.
* gfortran.dg/unconstrained_commons.f: Same.
Added:
trunk/gcc/testsuite/gcc.dg/pr79214.c
trunk/gcc/testsuite/gcc.dg/pr79214.h
trunk/gcc/testsuite/gcc.dg/pr79222.c
trunk/gcc/testsuite/gcc.dg/pr79223.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr78138.c
trunk/gcc/testsuite/gfortran.dg/unconstrained_commons.f
>From gcc-bugs-return-562595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:24:47 2017
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Subject: [Bug c/80632] error: invalid PHI argument with -O2
Date: Thu, 04 May 2017 20:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80632
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Reduced code:
a;
b() {
int c;
if (d()) {
e();
switch (a) {
case 0:
c = 1;
break;
case 1:
c = 0;
break;
case 2:
c = 0;
break;
case 3:
c = 0;
break;
default:
c = 1;
}
}
return c;
}
>From gcc-bugs-return-562596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:55:21 2017
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Subject: [Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings
Date: Thu, 04 May 2017 20:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 20:54:43 2017
New Revision: 247618
URL: https://gcc.gnu.org/viewcvs?rev=247618&root=gcc&view=rev
Log:
PR preprocessor/79214 - -Wno-system-header defeats strncat buffer overflow
warnings
PR middle-end/79222 - missing -Wstringop-overflow= on a stpcpy overflow
PR middle-end/79223 - missing -Wstringop-overflow on a memmove overflow
gcc/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* builtins.c (check_sizes): Add inlinining context and issue
warnings even when -Wno-system-headers is set.
(check_strncat_sizes): Same.
(expand_builtin_strncat): Same.
(expand_builtin_memmove): New function.
(expand_builtin_stpncpy): Same.
(expand_builtin): Handle memmove and stpncpy.
gcc/testsuite/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* gcc.dg/pr79214.c: New test.
* gcc.dg/pr79214.h: New test header.
* gcc.dg/pr79222.c: New test.
* gcc.dg/pr79223.c: New test.
* gcc.dg/pr78138.c: Adjust.
* gfortran.dg/unconstrained_commons.f: Same.
Added:
trunk/gcc/testsuite/gcc.dg/pr79214.c
trunk/gcc/testsuite/gcc.dg/pr79214.h
trunk/gcc/testsuite/gcc.dg/pr79222.c
trunk/gcc/testsuite/gcc.dg/pr79223.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr78138.c
trunk/gcc/testsuite/gfortran.dg/unconstrained_commons.f
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/79222] missing -Wstringop-overflow= on a stpcpy overflow
Date: Thu, 04 May 2017 20:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79222
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 20:54:43 2017
New Revision: 247618
URL: https://gcc.gnu.org/viewcvs?rev=247618&root=gcc&view=rev
Log:
PR preprocessor/79214 - -Wno-system-header defeats strncat buffer overflow
warnings
PR middle-end/79222 - missing -Wstringop-overflow= on a stpcpy overflow
PR middle-end/79223 - missing -Wstringop-overflow on a memmove overflow
gcc/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* builtins.c (check_sizes): Add inlinining context and issue
warnings even when -Wno-system-headers is set.
(check_strncat_sizes): Same.
(expand_builtin_strncat): Same.
(expand_builtin_memmove): New function.
(expand_builtin_stpncpy): Same.
(expand_builtin): Handle memmove and stpncpy.
gcc/testsuite/ChangeLog:
PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* gcc.dg/pr79214.c: New test.
* gcc.dg/pr79214.h: New test header.
* gcc.dg/pr79222.c: New test.
* gcc.dg/pr79223.c: New test.
* gcc.dg/pr78138.c: Adjust.
* gfortran.dg/unconstrained_commons.f: Same.
Added:
trunk/gcc/testsuite/gcc.dg/pr79214.c
trunk/gcc/testsuite/gcc.dg/pr79214.h
trunk/gcc/testsuite/gcc.dg/pr79222.c
trunk/gcc/testsuite/gcc.dg/pr79223.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr78138.c
trunk/gcc/testsuite/gfortran.dg/unconstrained_commons.f
>From gcc-bugs-return-562599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 20:57:10 2017
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
Date: Thu, 04 May 2017 20:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54924
Bug 54924 depends on bug 79214, which changed state.
Bug 79214 Summary: -Wno-system-header defeats strncat buffer overflow warnings
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
Known to fail| |7.0
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fix committed in r247618.
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Subject: [Bug middle-end/79222] missing -Wstringop-overflow= on a stpcpy overflow
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
Known to fail| |7.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fix committed in r247618.
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Subject: [Bug middle-end/79223] missing -Wstringop-overflow on a memmove overflow
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Known to work| |8.0
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Known to fail| |7.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fix committed in r247618.
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Subject: [Bug other/80634] New: strangely missed vectorization optimizations
Date: Thu, 04 May 2017 21:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80634
Bug ID: 80634
Summary: strangely missed vectorization optimizations
Product: gcc
Version: 6.3.1
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Created attachment 41322
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41322&action=edit
gcc 6.3.1 outputs for ELEMS=1 through ELEMS=32
(Not sure which component is the correct one for this issue).
I've noticed that the vectorizer makes some strange choices occasionally, and
will turn some straightforward code into a large branchy code sequence. Take
this, for example:
void saxpy(float a, float * restrict x, float * restrict y)
{
for (int i = 0; i < ELEMS; ++i)
y[i] = a*x[i] + y[i];
}
If I use the flags "-O3 -march=haswell" (or "-O3 -xAVX2" on ICC) and use
varying definitions of ELEMS, I will sometimes get odd results with GCC 6.3.1.
Here's -DELEMS=6 with GCC 6.3.1:
saxpy:
vshufps $0, %xmm0, %xmm0, %xmm1
vmovups (%rsi), %xmm2
vfmadd132ps (%rdi), %xmm2, %xmm1
vmovss 20(%rsi), %xmm3
vmovups %xmm1, (%rsi)
vmovss 16(%rdi), %xmm1
vfmadd213ss 16(%rsi), %xmm0, %xmm1
vfmadd132ss 20(%rdi), %xmm3, %xmm0
vmovss %xmm1, 16(%rsi)
vmovss %xmm0, 20(%rsi)
ret
Seems reasonable.
Here's -DELEMS=7 with GCC 6.3.1:
saxpy:
movq %rsi, %rax
shrq $2, %rax
negq %rax
andl $3, %eax
je .L7
vmovss (%rdi), %xmm1
vfmadd213ss (%rsi), %xmm0, %xmm1
vmovss %xmm1, (%rsi)
cmpl $1, %eax
je .L8
vmovss 4(%rdi), %xmm1
vfmadd213ss 4(%rsi), %xmm0, %xmm1
vmovss %xmm1, 4(%rsi)
cmpl $3, %eax
jne .L9
vmovss 8(%rdi), %xmm1
vfmadd213ss 8(%rsi), %xmm0, %xmm1
movl $4, %r8d
movl $3, %edx
vmovss %xmm1, 8(%rsi)
.L3:
movl $7, %ecx
movl %eax, %r9d
subl %eax, %ecx
.L2:
leaq (%rsi,%r9,4), %rax
vshufps $0, %xmm0, %xmm0, %xmm1
vmovaps (%rax), %xmm3
vfmadd132ps (%rdi,%r9,4), %xmm3, %xmm1
vmovaps %xmm1, (%rax)
leal 4(%rdx), %eax
cmpl $4, %ecx
je .L19
cltq
addl $5, %edx
leaq (%rsi,%rax,4), %rcx
vmovss (%rdi,%rax,4), %xmm1
vfmadd213ss (%rcx), %xmm0, %xmm1
vmovss %xmm1, (%rcx)
cmpl $5, %r8d
je .L17
movslq %edx, %rdx
leaq (%rsi,%rdx,4), %rax
vmovss (%rdi,%rdx,4), %xmm1
vfmadd213ss (%rax), %xmm0, %xmm1
vmovss %xmm1, (%rax)
cmpl $6, %r8d
je .L17
vmovss 24(%rsi), %xmm2
vfmadd132ss 24(%rdi), %xmm2, %xmm0
vmovss %xmm0, 24(%rsi)
ret
.L17:
ret
.L7:
movl $7, %ecx
xorl %r9d, %r9d
movl $7, %r8d
xorl %edx, %edx
jmp .L2
.L19:
ret
.L8:
movl $6, %r8d
movl $1, %edx
jmp .L3
.L9:
movl $5, %r8d
movl $2, %edx
jmp .L3
This might be explained away by it being an odd number just short of a power of
two, but ICC does an apparently better job (one packed FMA plus three single
FMAs):
saxpy:
vbroadcastss %xmm0, %xmm2
vmovups (%rdi), %xmm1
vmovss 16(%rdi), %xmm3
vmovss 20(%rdi), %xmm4
vmovss 24(%rdi), %xmm5
vfmadd213ps (%rsi), %xmm1, %xmm2
vfmadd213ss 16(%rsi), %xmm0, %xmm3
vfmadd213ss 20(%rsi), %xmm0, %xmm4
vfmadd213ss 24(%rsi), %xmm5, %xmm0
vmovups %xmm2, (%rsi)
vmovss %xmm3, 16(%rsi)
vmovss %xmm4, 20(%rsi)
vmovss %xmm0, 24(%rsi)
ret
The results from GCC 6.3.1 for ELEMS values 8 through 14 look fine (short
branchless code sequences similar to what ICC emits), but things go to crap
again for what seems to be *any* value ELEMS=15 or above.
It even misses the opportunity with ELEMS=16 to just do two packed FMAs with
YMM registers:
saxpy:
movq %rsi, %rax
shrq $2, %rax
negq %rax
andl $7, %eax
je .L7
vmovss (%rdi), %xmm1
vfmadd213ss (%rsi), %xmm0, %xmm1
vmovss %xmm1, (%rsi)
cmpl $1, %eax
je .L8
vmovss 4(%rdi), %xmm1
vfmadd213ss 4(%rsi), %xmm0, %xmm1
vmovss %xmm1, 4(%rsi)
cmpl $2, %eax
je .L9
vmovss 8(%rdi), %xmm1
vfmadd213ss 8(%rsi), %xmm0, %xmm1
vmovss %xmm1, 8(%rsi)
cmpl $3, %eax
je .L10
vmovss 12(%rdi), %xmm1
vfmadd213ss 12(%rsi), %xmm0, %xmm1
vmovss %xmm1, 12(%rsi)
cmpl $4, %eax
je .L11
vmovss 16(%rdi), %xmm1
vfmadd213ss 16(%rsi), %xmm0, %xmm1
vmovss %xmm1, 16(%rsi)
cmpl $5, %eax
je .L12
vmovss 20(%rdi), %xmm1
vfmadd213ss 20(%rsi), %xmm0, %xmm1
vmovss %xmm1, 20(%rsi)
cmpl $7, %eax
jne .L13
vmovss 24(%rdi), %xmm1
vfmadd213ss 24(%rsi), %xmm0, %xmm1
movl $9, %r9d
movl $7, %r10d
vmovss %xmm1, 24(%rsi)
.L3:
movl $16, %ecx
movl %eax, %edx
movl $8, %r8d
movl $1, %r11d
subl %eax, %ecx
.L2:
salq $2, %rdx
vbroadcastss %xmm0, %ymm1
leaq (%rdi,%rdx), %rax
addq %rsi, %rdx
vmovups (%rax), %ymm2
vfmadd213ps (%rdx), %ymm1, %ymm2
vmovaps %ymm2, (%rdx)
cmpl $2, %r11d
jne .L4
vmovaps 32(%rdx), %ymm4
vfmadd132ps 32(%rax), %ymm4, %ymm1
vmovaps %ymm1, 32(%rdx)
.L4:
movl %r9d, %edx
leal (%r8,%r10), %eax
subl %r8d, %edx
cmpl %r8d, %ecx
je .L29
movslq %eax, %r8
leaq (%rsi,%r8,4), %rcx
vmovss (%rdi,%r8,4), %xmm1
vfmadd213ss (%rcx), %xmm0, %xmm1
vmovss %xmm1, (%rcx)
leal 1(%rax), %ecx
cmpl $1, %edx
je .L29
movslq %ecx, %rcx
leaq (%rsi,%rcx,4), %r8
vmovss (%rdi,%rcx,4), %xmm1
leal 2(%rax), %ecx
vfmadd213ss (%r8), %xmm0, %xmm1
vmovss %xmm1, (%r8)
cmpl $2, %edx
je .L29
movslq %ecx, %rcx
leaq (%rsi,%rcx,4), %r8
vmovss (%rdi,%rcx,4), %xmm1
leal 3(%rax), %ecx
vfmadd213ss (%r8), %xmm0, %xmm1
vmovss %xmm1, (%r8)
cmpl $3, %edx
je .L29
movslq %ecx, %rcx
leaq (%rsi,%rcx,4), %r8
vmovss (%rdi,%rcx,4), %xmm1
leal 4(%rax), %ecx
vfmadd213ss (%r8), %xmm0, %xmm1
vmovss %xmm1, (%r8)
cmpl $4, %edx
je .L29
movslq %ecx, %rcx
leaq (%rsi,%rcx,4), %r8
vmovss (%rdi,%rcx,4), %xmm1
leal 5(%rax), %ecx
vfmadd213ss (%r8), %xmm0, %xmm1
vmovss %xmm1, (%r8)
cmpl $5, %edx
je .L29
movslq %ecx, %rcx
addl $6, %eax
leaq (%rsi,%rcx,4), %r8
vmovss (%rdi,%rcx,4), %xmm1
vfmadd213ss (%r8), %xmm0, %xmm1
vmovss %xmm1, (%r8)
cmpl $6, %edx
je .L29
cltq
leaq (%rsi,%rax,4), %rdx
vmovss (%rdx), %xmm3
vfmadd132ss (%rdi,%rax,4), %xmm3, %xmm0
vmovss %xmm0, (%rdx)
.L29:
vzeroupper
ret
.L7:
movl $16, %r8d
movl $16, %ecx
xorl %edx, %edx
xorl %r10d, %r10d
movl $2, %r11d
movl $16, %r9d
jmp .L2
.L13:
movl $10, %r9d
movl $6, %r10d
jmp .L3
.L8:
movl $15, %r9d
movl $1, %r10d
jmp .L3
.L9:
movl $14, %r9d
movl $2, %r10d
jmp .L3
.L10:
movl $13, %r9d
movl $3, %r10d
jmp .L3
.L11:
movl $12, %r9d
movl $4, %r10d
jmp .L3
.L12:
movl $11, %r9d
movl $5, %r10d
jmp .L3
ICC gets ELEMS=16 right:
saxpy:
vmovups (%rdi), %ymm1
vmovups 32(%rdi), %ymm2
vbroadcastss %xmm0, %ymm3
vfmadd213ps (%rsi), %ymm3, %ymm1
vfmadd213ps 32(%rsi), %ymm2, %ymm3
vmovups %ymm1, (%rsi)
vmovups %ymm3, 32(%rsi)
vzeroupper
ret
I'll attach the code outputs for ELEMS values 1 through 32 using GCC 6.3.1 and
ICC 17.0.1.
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From: "steven at uplinklabs dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/80634] strangely missed vectorization optimizations
Date: Thu, 04 May 2017 22:30:00 -0000
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--- Comment #1 from Steven Noonan <steven at uplinklabs dot net> ---
Created attachment 41323
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41323&action=edit
icc 17.0.1 outputs for ELEMS=1 through ELEMS=32
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From: "palves at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80635] New: std::optional and bogus -Wmaybe-uninitilized
Date: Thu, 04 May 2017 22:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635
Bug ID: 80635
Summary: std::optional and bogus -Wmaybe-uninitilized
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Component: c++
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GDB ran into an odd -Wmaybe-uninitialized warning in code using std::optional
Well, actually with gdb::optional, but std::optional shows the exact same
warning. <Ref: https://sourceware.org/ml/gdb-patches/2017-05/msg00118.html>.
The reproducer below is a reduced self-contained testcase that triggers the
same warning. I wasn't able to reduce it further.
$ cat optional.cc
//#include <optional>
#include <new>
template<typename T>
struct optional
{
optional () : m_dummy () {}
~optional () { m_item.~T (); }
void emplace () { new (&m_item) T (); }
union
{
int m_dummy;
T m_item;
};
};
template <typename T>
using Optional = optional<T>; // warns
//using Optional = std::optional<T>; // warns too
extern int get ();
extern void set (int);
struct A
{
A () : m (get ()) {}
~A () { set (m); }
int m;
};
struct B
{
B ();
~B ();
};
void func ()
{
Optional<A> maybe_a;
Optional<B> maybe_b;
maybe_a.emplace ();
maybe_b.emplace ();
}
With g++ 8.0.0 20170428 pristine built from trunk:
$ /opt/gcc/bin/g++ optional.cc -g3 -O2 -Wall -c
optional.cc: In function ‘void func()’:
optional.cc:28:15: warning:
‘maybe_a.optional<A>::<anonymous>.optional<A>::<unnamed union>::m_dummy’ may be
used uninitialized in this function [-Wmaybe-uninitialized]
~A () { set (m); }
~~~~^~~
optional.cc:41:15: note:
‘maybe_a.optional<A>::<anonymous>.optional<A>::<unnamed union>::m_dummy’ was
declared here
Optional<A> maybe_a;
^~~~~~~
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitilized
Date: Thu, 04 May 2017 22:33:00 -0000
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--- Comment #1 from Pedro Alves <palves at redhat dot com> ---
If you uncomment the lines to use std::optional instead, you get:
$ /opt/gcc/bin/g++ optional.cc -g3 -O2 -Wall -std=gnu++17 -c
optional.cc: In function ‘void func()’:
optional.cc:28:15: warning: ‘maybe_a.A::m’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
~A () { set (m); }
~~~~^~~
optional.cc:41:15: note: ‘maybe_a.A::m’ was declared here
Optional<A> maybe_a;
^~~~~~~
This warns at a different location from the reproducer in the OP.
If you revert back to use the self-contained optional, and change the
optional::m_dummy field to be of empty struct type, similarly to
std::optional:
union
{
struct {} m_dummy;
T m_item;
};
then you get the exact same warning you get with std::optional.
I suspect that the "maybe_a.A::m" location is a bug of its own and a red
herring here, but I can't be sure.
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
Date: Thu, 04 May 2017 22:34:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
Component|c |tree-optimization
Target Milestone|--- |8.0
Summary|error: invalid PHI argument |[8 Regression] error:
|with -O2 |invalid PHI argument with
| |-O2
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r247538.
>From gcc-bugs-return-562608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 04 22:34:42 2017
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
Date: Thu, 04 May 2017 22:52:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-04
Ever confirmed|0 |1
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Testcase without implicit ints:
extern int d (void);
extern void e (void);
int a;
int
b (void)
{
int c;
if (d ())
{
e ();
switch (a)
{
case 0:
c = 1;
break;
case 1:
c = 0;
break;
case 2:
c = 0;
break;
case 3:
c = 0;
break;
default:
c = 1;
}
}
return c;
}
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
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--- Comment #2 from Pedro Alves <palves at redhat dot com> ---
Looks like a regression at some point:
There are no warnings with g++ 5.3.1, either reduced testcase, or with the
obvious change to use std::experimental::optional instead of std::optional.
Also no warnings with g++ 8.0.0 20170428 + -fno-lifetime-dse or
-flifetime-dse=1, perhaps unsurprisingly.
The original bug supposedly triggers with g++ 6.3.1 too, though I haven't
confirmed with the reduced testcase there. (It's an s390 gdb buildbot, I don't
have access to it.)
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Subject: [Bug middle-end/79234] warn on past the end reads by library functions
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 23:50:21 2017
New Revision: 247622
URL: https://gcc.gnu.org/viewcvs?rev=247622&root=gcc&view=rev
Log:
PR libstdc++/54924 - Warn for std::string constructor with wrong size
PR middle-end/79234 - warn on past the end reads by library functions
gcc/ChangeLog:
PR middle-end/79234
* builtins.c (check_sizes): Adjust to handle reading past the end.
Avoid printing excessive upper bound of ranges. Use %E to print
tree nodes instead of converting them to %wu.
(expand_builtin_memchr): New function.
(compute_dest_size): Rename...
(compute_objsize): ...to this.
(expand_builtin_memcpy): Adjust.
(expand_builtin_mempcpy): Adjust.
(expand_builtin_strcat): Adjust.
(expand_builtin_strcpy): Adjust.
(check_strncat_sizes): Adjust.
(expand_builtin_strncat): Adjust.
(expand_builtin_strncpy): Adjust and simplify.
(expand_builtin_memset): Adjust.
(expand_builtin_bzero): Adjust.
(expand_builtin_memcmp): Adjust.
(expand_builtin): Handle memcmp.
(maybe_emit_chk_warning): Check strncat just once.
gcc/testsuite/ChangeLog:
PR middle-end/79234
* gcc.dg/builtin-stringop-chk-8.c: New test.
* gcc.dg/builtin-stringop-chk-1.c: Adjust.
* gcc.dg/builtin-stringop-chk-4.c: Same.
* gcc.dg/builtin-strncat-chk-1.c: Same.
* g++.dg/ext/strncpy-chk1.C: Same.
* g++.dg/torture/Wsizeof-pointer-memaccess1.C: Same.
* gcc.dg/out-of-bounds-1.c: Same.
* gcc.dg/pr78138.c: Same.
* gcc.dg/torture/Wsizeof-pointer-memaccess1.c: Same.
* gfortran.dg/mvbits_7.f90: Same.
Added:
trunk/gcc/testsuite/gcc.dg/builtin-stringop-chk-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ext/strncpy-chk1.C
trunk/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C
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trunk/gcc/testsuite/gcc.dg/builtin-stringop-chk-4.c
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu May 4 23:50:21 2017
New Revision: 247622
URL: https://gcc.gnu.org/viewcvs?rev=247622&root=gcc&view=rev
Log:
PR libstdc++/54924 - Warn for std::string constructor with wrong size
PR middle-end/79234 - warn on past the end reads by library functions
gcc/ChangeLog:
PR middle-end/79234
* builtins.c (check_sizes): Adjust to handle reading past the end.
Avoid printing excessive upper bound of ranges. Use %E to print
tree nodes instead of converting them to %wu.
(expand_builtin_memchr): New function.
(compute_dest_size): Rename...
(compute_objsize): ...to this.
(expand_builtin_memcpy): Adjust.
(expand_builtin_mempcpy): Adjust.
(expand_builtin_strcat): Adjust.
(expand_builtin_strcpy): Adjust.
(check_strncat_sizes): Adjust.
(expand_builtin_strncat): Adjust.
(expand_builtin_strncpy): Adjust and simplify.
(expand_builtin_memset): Adjust.
(expand_builtin_bzero): Adjust.
(expand_builtin_memcmp): Adjust.
(expand_builtin): Handle memcmp.
(maybe_emit_chk_warning): Check strncat just once.
gcc/testsuite/ChangeLog:
PR middle-end/79234
* gcc.dg/builtin-stringop-chk-8.c: New test.
* gcc.dg/builtin-stringop-chk-1.c: Adjust.
* gcc.dg/builtin-stringop-chk-4.c: Same.
* gcc.dg/builtin-strncat-chk-1.c: Same.
* g++.dg/ext/strncpy-chk1.C: Same.
* g++.dg/torture/Wsizeof-pointer-memaccess1.C: Same.
* gcc.dg/out-of-bounds-1.c: Same.
* gcc.dg/pr78138.c: Same.
* gcc.dg/torture/Wsizeof-pointer-memaccess1.c: Same.
* gfortran.dg/mvbits_7.f90: Same.
Added:
trunk/gcc/testsuite/gcc.dg/builtin-stringop-chk-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ext/strncpy-chk1.C
trunk/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C
trunk/gcc/testsuite/gcc.dg/builtin-stringop-chk-1.c
trunk/gcc/testsuite/gcc.dg/builtin-stringop-chk-4.c
trunk/gcc/testsuite/gcc.dg/builtin-strncat-chk-1.c
trunk/gcc/testsuite/gcc.dg/out-of-bounds-1.c
trunk/gcc/testsuite/gcc.dg/pr78138.c
trunk/gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-1.c
trunk/gcc/testsuite/gfortran.dg/mvbits_7.f90
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Subject: [Bug middle-end/79234] warn on past the end reads by library functions
Date: Fri, 05 May 2017 00:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79234
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed in r247622.
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
Date: Fri, 05 May 2017 00:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54924
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Sadly, even with pr79214 fixed and pr79234 implemented, -Wno-system-headers
still somehow defeats the warning.
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80636] New: AVX / AVX512 register-zeroing should always use AVX 128b, not ymm or zmm
Date: Fri, 05 May 2017 00:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80636
Bug ID: 80636
Summary: AVX / AVX512 register-zeroing should always use AVX
128b, not ymm or zmm
Product: gcc
Version: 8.0
URL: http://stackoverflow.com/questions/43713273/is-vxorps-
zeroing-on-amd-jaguar-bulldozer-zen-faster-with-xmm-re
gisters-than-ymm
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: peter at cordes dot ca
Target Milestone: ---
Target: x86_64-*-*, i?86-*-*
Currently, gcc compiles _mm256_setzero_ps() to vxorps %ymm0, %ymm0, %ymm0, or
zmm for _mm512_setzero_ps. And similar for pd and integer vectors, using a
vector size that matches how it's going to use the register.
vxorps %xmm0, %xmm0, %xmm0 has the same effect, because AVX instructions zero
the destination register out to VLMAX.
AMD Ryzen decodes the xmm version to 1 micro-op, but the ymm version to 2
micro-ops. It doesn't detect the zeroing idiom special-case until after the
decoder has split it. (Earlier AMD CPUs (Bulldozer/Jaguar) may be similar.)
---
For zeroing a ZMM register, it also saves a byte or two to use a VEX prefix
instead of EVEX, if the target register is zmm0-15. (zmm16-31 of course always
need EVEX).
---
There is no benefit, but also no downside, to using xmm-zeroing on Intel CPUs
that don't split 256b or 512b vector ops. This change could be made across the
board, without adding any tuning options to control it.
References:
http://stackoverflow.com/a/43751783/224132 Agner Fog's answer to my SO question
about this.
https://bugs.llvm.org/show_bug.cgi?id=32862 the same issue for clang.
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Subject: [Bug target/80634] strangely missed vectorization optimizations
Date: Fri, 05 May 2017 00:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80634
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|other |target
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So it is doing an alignment check ...
So that would mean it is an issue with the cost model.
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From: "ryan.burn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80637] New: [concepts] incorrect ambiguous overload
Date: Fri, 05 May 2017 01:48:00 -0000
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Bug ID: 80637
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This code won't compile with GCC
/////////////////////////////////////////////////////
template <class T>
struct A {
void f()
requires std::is_same_v<T, int>
{
}
void f(int)
requires !std::is_same_v<T, int>
{
}
};
int main() {
auto fptr = &A<int>::f;
return 0;
}
/////////////////////////////////////////////////////
According to the discussion here, it should be valid:
http://stackoverflow.com/q/43793941/4447365
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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/80638] New: -ansi suppresses -Wstringop-overflow for mempcpy
Date: Fri, 05 May 2017 05:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80638
Bug ID: 80638
Summary: -ansi suppresses -Wstringop-overflow for mempcpy
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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A program containing a buffer overflow in a call to mempcpy compiled with the
-ansi option GCC is not diagnosed. The same program is diagnosed without the
option, or when the call to mempcpy is replaced with memcpy.
Calls to known library functions that overflow should be diagnosed regardless
of -ansi.
$ (set -x && cat a.c && for opt in '' -ansi; do gcc -O2 -S -Wall $opt a.c;
done)
+ cat a.c
extern void* mempcpy (void*, const void*, __SIZE_TYPE__);
char d[3];
void f (void)
{
mempcpy (d, "1234", 5);
}
+ for opt in ''\'''\''' -ansi
+ gcc -O2 -S -Wall a.c
a.c: In function ‘f’:
a.c:7:3: warning: ‘mempcpy’ writing 5 bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
mempcpy (d, "1234", 5);
^~~~~~~~~~~~~~~~~~~~~~
+ for opt in ''\'''\''' -ansi
+ gcc -O2 -S -Wall -ansi a.c
$
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Fri, 05 May 2017 05:05:00 -0000
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--- Comment #10 from coypu <coypu at sdf dot org> ---
(In reply to H.J. Lu from comment #9)
>
> This may break Linux. You may want to investigate if this approach:
>
> commit 6e6c7fc1e15525a10f48d4f5ac2edd853e2f5cb7
> Author: nsz <nsz@138bc75d-0d04-0410-961f-82ee72b054a4>
> Date: Fri Nov 11 17:31:07 2016 +0000
>
> [i386][musl] Add cpuinfo to static libgcc only on *-musl*
>
> The __cpu_indicator_init and __cpu_model symbols are not safe to use
> from shared libgcc_s.so from ifunc resolvers, so since gcc-6, only
> the definitions from static libgcc.a are used, however the symbols
> are kept in libgcc_s as well for backward compatibility (with
> appropriate symbol version). On targets without such backward
> compatibility concern add cpuinfo to the static library only (this
> avoids running the ctor, reduces libgcc_s size and elf abi concerns
> about the versioned symbols).
>
> works for you.
Thanks. if I understand it correctly, it breaks backwards compatibility, so
would rather avoid it. With my (not upstreamable) patch we have a working GCC,
so it's not a pressing issue for us, although it seems to affect many other
platforms.
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Subject: [Bug c/80638] -ansi suppresses -Wstringop-overflow for mempcpy
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-ansi disables mempcpy as being a builtin.
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Subject: [Bug c/80638] -ansi suppresses -Wstringop-overflow for mempcpy
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If you had used __builtin_mempcpy you would have got the warning.
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Subject: [Bug c/80638] -ansi suppresses -Wstringop-overflow for mempcpy
Date: Fri, 05 May 2017 07:22:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Calls to known library functions that overflow should be diagnosed regardless of -ansi.
No, because mempcpy is not included in the ISO standard. Basically -ansi is
the same as doing -fstd=c11.
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll have a look then.
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Subject: [Bug target/80634] strangely missed vectorization optimizations
Date: Fri, 05 May 2017 07:31:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
Did you also try to benchmark it? Last time I checked a similar example, both
versions had similar performance.
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Subject: [Bug target/80636] AVX / AVX512 register-zeroing should always use AVX 128b, not ymm or zmm
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The same possibly applies to all "zero-extending" moves?
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 07:38:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
If you mark "get" as noexcept, the warning disappears. If get throws an
exception, you can very well end up running the destructor without having
initialized the members. The warning seems correct to me.
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Subject: [Bug c++/80633] [7/8 Regression] -Wstrict-aliasing false positive
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Keywords| |diagnostic
Target Milestone|--- |7.2
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Subject: [Bug target/80634] strangely missed vectorization optimizations
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
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CC| |rguenth at gcc dot gnu.org
Blocks| |53947
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Yet another example where the alingment peeling is confused by the
vectorizer cost model of the target (well -- not entirely so but clearly that's
part of the story).
There's some niter-based cost modeling going on as well that's very
conservative
at the moment:
/* Cost model #2 - if peeling may result in a remaining loop not
iterating enough to be vectorized then do not peel. */
if (do_peeling
&& LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo))
{
unsigned max_peel
= npeel == 0 ? LOOP_VINFO_VECT_FACTOR (loop_vinfo) - 1 : npeel;
if (LOOP_VINFO_INT_NITERS (loop_vinfo)
< LOOP_VINFO_VECT_FACTOR (loop_vinfo) + max_peel)
do_peeling = false;
}
so it just ensures the remaining vector loop would iterate at least once. But
in reality it should use the full cost model, thus looking at the peeling cost,
esp. if we need to add a epilogue. That's not easily possible right now so
some better heuristic is needed here, like pessimizing the case where
niter is a multiple of VF.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/80631] [6/7/8 Regression] Compiling with -O3 -mavx2 gives wrong code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80631
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P2
Component|c |tree-optimization
>From gcc-bugs-return-562630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 07:43:49 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80639] New: ICE on valid C++11 code: in cxx_eval_outermost_constant_expr, at cp/constexpr.c:4642
Date: Fri, 05 May 2017 07:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80639
Bug ID: 80639
Summary: ICE on valid C++11 code: in
cxx_eval_outermost_constant_expr, at
cp/constexpr.c:4642
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It seems to be a recent regression.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170505 (experimental) [trunk revision 247627] (GCC)
$
$ g++-6.2 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp: In instantiation of ‘constexpr void (A<B>::* const A<B>::h)()<0>’:
small.cpp:19:3: required from ‘static void B::K<<anonymous> >::n() [with int
<anonymous> = 0]’
small.cpp:7:24: required from here
small.cpp:13:41: internal compiler error: in cxx_eval_outermost_constant_expr,
at cp/constexpr.c:4642
template < int u > static constexpr T h = &B::m < u >;
^
0x8e50dd cxx_eval_outermost_constant_expr
../../gcc-source-trunk/gcc/cp/constexpr.c:4641
0x74e6dc store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc-source-trunk/gcc/cp/typeck2.c:827
0x6a27a2 check_initializer
../../gcc-source-trunk/gcc/cp/decl.c:6363
0x6cf7dd cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl.c:7035
0x6f456a instantiate_decl(tree_node*, bool, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22697
0x787af7 maybe_instantiate_decl
../../gcc-source-trunk/gcc/cp/decl2.c:5012
0x789539 mark_used(tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl2.c:5108
0x733853 lookup_and_finish_template_variable(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/pt.c:9090
0x702eb6 tsubst_qualified_id
../../gcc-source-trunk/gcc/cp/pt.c:14358
0x7045ee tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-source-trunk/gcc/cp/pt.c:16879
0x6f7b47 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:16467
0x6f8f3e tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15732
0x6f753b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15718
0x6f8343 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15944
0x6f57a4 instantiate_decl(tree_node*, bool, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22898
0x7456d2 instantiate_pending_templates(int)
../../gcc-source-trunk/gcc/cp/pt.c:23019
0x78b0f1 c_parse_final_cleanups()
../../gcc-source-trunk/gcc/cp/decl2.c:4526
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.
$
----------------------------------------------------------
template < typename > struct A;
struct B
{
template < int > void m ();
template < int > struct K { static void n (); };
void p () { K < 0 >::n (); }
};
template <> struct A < B >
{
using T = void (A::*)();
template < int u > static constexpr T h = &B::m < u >;
};
template < int v > void B::K < v >::n ()
{
using S = A < B >;
S::h < 0 >;
}
>From gcc-bugs-return-562631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 07:56:53 2017
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Subject: [Bug c++/80639] [7/8 Regression] ICE on valid C++11 code: in cxx_eval_outermost_constant_expr, at cp/constexpr.c:4642
Date: Fri, 05 May 2017 08:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80639
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-05
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|ICE on valid C++11 code: in |[7/8 Regression] ICE on
|cxx_eval_outermost_constant |valid C++11 code: in
|_expr, at |cxx_eval_outermost_constant
|cp/constexpr.c:4642 |_expr, at
| |cp/constexpr.c:4642
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r246180.
>From gcc-bugs-return-562632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 08:14:58 2017
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Subject: [Bug c++/80639] [7/8 Regression] ICE on valid C++11 code: in cxx_eval_outermost_constant_expr, at cp/constexpr.c:4642
Date: Fri, 05 May 2017 08:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P2
Version|unknown |7.1.1
Target Milestone|--- |7.2
>From gcc-bugs-return-562633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 08:16:58 2017
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
Date: Fri, 05 May 2017 08:37:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm starting to think we should just make libstdc++ headers 100% warning-free
and stop marking them as system headers with the pragmas. When they're
installed under /usr they'd still be considered system headers though.
>From gcc-bugs-return-562634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 08:37:02 2017
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
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--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #10)
> I'm starting to think we should just make libstdc++ headers 100%
> warning-free and stop marking them as system headers with the pragmas. When
> they're installed under /usr they'd still be considered system headers
> though.
Invent #pragma not_system_header ? But being a system header is sometimes also
used to enable extensions, which may still be useful for libstdc++ headers.
>From gcc-bugs-return-562635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 09:03:04 2017
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Subject: [Bug c++/71577] [6/7/8 regression] ICE on invalid C++11 code (with extra struct initializer): in digest_init_r, at cp/typeck2.c:1117
Date: Fri, 05 May 2017 09:04:00 -0000
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--- Comment #8 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Fri May 5 09:02:22 2017
New Revision: 247630
URL: https://gcc.gnu.org/viewcvs?rev=247630&root=gcc&view=rev
Log:
/cp
2017-05-05 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/71577
* decl.c (reshape_init): Unconditionally return error_mark_node
upon error about too many initializers.
/testsuite
2017-05-05 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/71577
* g++.dg/cpp0x/pr71577.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr71577.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/71577] [6/7 regression] ICE on invalid C++11 code (with extra struct initializer): in digest_init_r, at cp/typeck2.c:1117
Date: Fri, 05 May 2017 09:05:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 regression] ICE on |[6/7 regression] ICE on
|invalid C++11 code (with |invalid C++11 code (with
|extra struct initializer): |extra struct initializer):
|in digest_init_r, at |in digest_init_r, at
|cp/typeck2.c:1117 |cp/typeck2.c:1117
--- Comment #9 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Should be fixed in trunk. If everything goes well, a backport seems possible.
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From: "palves at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 09:26:00 -0000
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--- Comment #4 from Pedro Alves <palves at redhat dot com> ---
Hi Marc, thanks much for taking a look.
Looks like I over reduced in the minimal reproducer. std::optional has a
boolean field to track whether the contained object had been fully initialized,
which is checked in the desctructor, but I removed it because its presence
doesn't affect whether the warning is emitted. Of course, std::optional has
that field, but still, it warns.
A couple of things that look suspiciously odd to me, even in the
original testcase:
- the warning is about A::m_dummy, while optional::~optional calls the
m_item/T's destructor, not m_dummy's.
- the warning triggers in A/optional<A>, but for some reason, only if
B/optional<B> exist, as well as the maybe_b variable, which are all
completely unrelated to A. This one makes me wonder if there's some
miscompilation related to aliasing or or object lifetimes going on,
not just a warning.
Here's the corrected testcase:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$ cat optional2.cc
//#include <optional>
//#include <experimental/optional>
#include <new>
template<typename T>
struct optional
{
optional ()
: m_dummy (),
m_instantiated (false)
{}
~optional ()
{
if (m_instantiated)
m_item.~T (); // won't run unless T is fully constructed.
}
void emplace ()
{
new (&m_item) T ();
m_instantiated = true; // not set if T() throws
}
union
{
int m_dummy;
T m_item;
};
bool m_instantiated;
};
template <typename T>
using Optional = optional<T>; // warns
//using Optional = std::experimental::optional<T>; // warns too
//using Optional = std::optional<T>; // warns too
extern int get ();
extern void set (int);
struct A
{
A () : m (get ()) {} // warns here
~A () { set (m); }
int m;
};
// for some reason, need B to trigger the warning.
struct B
{
B (); // remove or make noexcept, and the warning disappears
~B (); // remove, and the warning disappears
};
void func ()
{
Optional<A> maybe_a;
Optional<B> maybe_b; // for some reason, need this here to trigger a
// warning in _A_.
maybe_a.emplace ();
maybe_b.emplace (); // comment out, and the warning disappears.
}
$ /opt/gcc/bin/g++ optional2.cc -O2 -Wall -c
optional2.cc: In function ‘void func()’:
optional2.cc:45:15: warning:
‘maybe_a.optional<A>::<anonymous>.optional<A>::<unnamed union>::m_dummy’ may be
used uninitialized in this function [-Wmaybe-uninitialized]
~A () { set (m); }
~~~~^~~
optional2.cc:59:15: note:
‘maybe_a.optional<A>::<anonymous>.optional<A>::<unnamed union>::m_dummy’ was
declared here
Optional<A> maybe_a;
^~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Do you see anything invalid in this version of the test?
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From: "nicolas@morey-chaisemartin.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80640] New: Missing memory side effect
Date: Fri, 05 May 2017 10:04:00 -0000
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Bug ID: 80640
Summary: Missing memory side effect
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I found what seems to be a GCC issue while building/running the OpenMPI 2.1.0
testsuite using GCC 6.3.1 on i586 (Suse Tumbleweed)
I attached the tarball with the preprocessed source file and the minimum
libraries.
It compiles with:
--------
gcc -o opal_fifo opal_fifo.c libopen-pal.so.20 -ldl libsupport.a -lrt -lm
-lutil -pthread -Wl,-rpath -Wl,$(pwd)
--------
When compiling witrh O0, or O1 the test works. It stalls with O2 and O3.
From what I could find, the program get stuck here:
--------
while (&fifo->opal_fifo_ghost == item->opal_list_next) {
opal_atomic_rmb ();
}
--------
opal_atomic_rmb is defined like this
--------
static inline void opal_atomic_rmb(void)
{
__atomic_thread_fence (2);
}
--------
The assembly for this loop looks like this:
--------
=> 0x080495a5 <+325>: cmp %edi,%eax
0x080495a7 <+327>: je 0x80495a5 <thread_test+325>
--------
I'm a little rusty on x86 assembly but for me it means GCC cached the value to
compare and never reloads them from memory.
I would expect the __atomic_thread_fence atomic to have some kind of memory
side effect that means these values should be reloaded.
Adding a simple
--------
__asm__ __volatile__("": : :"memory");
--------
to opal_atomic_rmb seems to fix the issue.
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Subject: [Bug c++/80641] New: Warning with std::vector resize in loop
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Bug ID: 80641
Summary: Warning with std::vector resize in loop
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#include <vector>
int main()
{
std::vector<int> c {1,2,3,0};
while(c.size() > 0 && c.back() == 0)
{
auto sz = c.size() -1;
c.resize(sz);
}
return 0;
}
$ c++7.1 -O3 tt.cxx
cc1plus: warning: 'void* __builtin_memset(void*, int, long unsigned int)':
specified size 18446744073709551612 exceeds maximum object size
9223372036854775807 -Wstringop-overflow=]
No warning comes when I use GCC 6.1
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Subject: [Bug c/80640] Missing memory side effect
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The attachment is missing.
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41324
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41324&action=edit
gcc8-pr80632.patch
Untested fix.
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Subject: [Bug c++/80641] Warning with std::vector resize in loop
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
If I (very hackishly) enable A + CST CMP A -> A CMP' CST' without single_use,
and (unsigned long)x==0 --> x==0, we simplify quite a bit more and the warning
disappears.
(and there would still be some margin, where we could simplify
_6 = _8 /[ex] 4;
_17 = (long unsigned int) _6;
sz_13 = _17 + 18446744073709551615;
_48 = sz_13 * 4;
to
tmp = (long unsigned int) _8
_48 = tmp + 18446744073709551612;
)
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Subject: [Bug lto/56532] valgrind errors with -flto
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Jakub, I can't reproduce it, even for the release you mentioned in the PR. Can
you please try it?
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, after a discussion with Honza, we're not planning to fix that. As mentioned
in the warning info, it's still up to user to mark the function as pure. Having
a call to a noreturn function in a condition is tricky to handle by compiler.
>From gcc-bugs-return-562645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 10:50:45 2017
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Subject: [Bug lto/64636] Bootstrapping gcc-4.9.2 fails if lto is enabled
Date: Fri, 05 May 2017 11:02:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-05
CC| |marxin at gcc dot gnu.org
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi. Can you please test it with a new release of GCC? If yes, then please
attach the pre-processed file and regex.gcda file that's needed for
-fprofile-use.
>From gcc-bugs-return-562646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 11:02:12 2017
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Fri, 05 May 2017 11:03:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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| |marxin at gcc dot gnu.org
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Ever confirmed|0 |1
Known to fail| |6.3.0, 7.1.0, 8.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, checking assert is triggered for:
Breakpoint 1, symtab_node::get_partitioning_class (this=0x7ffff69dab80) at
../../gcc/symtab.c:1866
1866 gcc_checking_assert (vnode->definition);
(gdb) p vnode->debug()
__go_tdn_unicode.SpecialCase$gc/164 (__go_tdn_unicode.SpecialCase$gc)
@0x7ffff69dab80
Type: variable
Body removed by symtab_remove_unreachable_nodes
Visibility: public artificial
References:
Referring:
__go_td_S6_._f.$fpv16_.go_bytes._case1pN19_unicode.SpecialCasexe$gc/40 (addr)
Availability: not_available
Varpool flags:
$3 = void
(gdb) bt
#0 symtab_node::get_partitioning_class (this=0x7ffff69dab80) at
../../gcc/symtab.c:1866
#1 0x0000000000b7f8cd in lto_output_varpool_node (ob=<optimized out>,
ob=<optimized out>, encoder=0x2515e80, node=0x7ffff69dab80) at
../../gcc/lto-cgraph.c:615
#2 output_symtab () at ../../gcc/lto-cgraph.c:1026
#3 0x0000000000b92ad3 in lto_output () at ../../gcc/lto-streamer-out.c:2390
#4 0x0000000000c072bf in write_lto () at ../../gcc/passes.c:2582
#5 0x0000000000c0b221 in ipa_write_summaries_1 (encoder=0x2515e80) at
../../gcc/passes.c:2646
#6 ipa_write_summaries () at ../../gcc/passes.c:2706
#7 0x00000000008b3610 in ipa_passes () at ../../gcc/cgraphunit.c:2373
#8 symbol_table::compile (this=0x7ffff6864100) at ../../gcc/cgraphunit.c:2467
#9 0x00000000008b5e18 in symbol_table::finalize_compilation_unit
(this=0x7ffff6864100) at ../../gcc/cgraphunit.c:2626
#10 0x0000000000ce7f4a in compile_file () at ../../gcc/toplev.c:493
#11 0x000000000071ff6c in do_compile () at ../../gcc/toplev.c:2004
#12 toplev::main (this=this@entry=0x7fffffffdaf0, argc=<optimized out>,
argc@entry=17, argv=<optimized out>, argv@entry=0x7fffffffdbf8) at
../../gcc/toplev.c:2138
#13 0x0000000000722489 in main (argc=17, argv=0x7fffffffdbf8) at
../../gcc/main.c:40
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Fri, 05 May 2017 11:10:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Ian can you please take a look?
>From gcc-bugs-return-562648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 11:10:59 2017
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Subject: [Bug libstdc++/54924] Warn for std::string constructor with wrong size
Date: Fri, 05 May 2017 11:15:00 -0000
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Indeed, it's what allows us to use variadic templates in C++98 mode, for
example. And I don't think there's any way to use
__attribute__((__extension__)) on template parameter packs to do that
differently.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 11:20:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Pedro Alves from comment #4)
> Looks like I over reduced in the minimal reproducer. std::optional has a
> boolean field to track whether the contained object had been fully
> initialized, which is checked in the desctructor, but I removed it because
> its presence doesn't affect whether the warning is emitted. Of course,
> std::optional has that field, but still, it warns.
I think the problem is that GCC isn't smart enough to infer the invariant that
the truthiness of the bool corresponds to the initialization of the member. So
the value of the bool is treated as unrelated to the (un)initialized state. By
inspecting all the accesses to the bool we can tell that's true, but the
compiler apparently can't. I don't know how we could state the invariant in
code.
>From gcc-bugs-return-562650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 11:20:15 2017
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
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--- Comment #6 from Pedro Alves <palves at redhat dot com> ---
That kind of makes sense if you look at optional<T> in isolation, but why does
it _not_ warn if you remove anything related to B and leave only A? That's
what's truly mystifying to me.
Even this change makes the warning go away:
void func ()
{
Optional<A> maybe_a;
- Optional<B> maybe_b; // for some reason, need this here to trigger a
+ Optional<A> maybe_b; // for some reason, need this here to trigger a
// warning in _A_.
maybe_a.emplace ();
maybe_b.emplace (); // comment out, and the warning disappears.
}
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Subject: [Bug middle-end/79665] gcc's signed (x*x)/200 is slower than clang's
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--- Comment #17 from wilco at gcc dot gnu.org ---
(In reply to wilco from comment #16)
> (In reply to wilco from comment #14)
> > (In reply to PeteVine from comment #13)
> > > Still, the 5% regression must have happened very recently. The fast gcc was
> > > built on 20170220 and the slow one yesterday, using the original patch. Once
> > > again, switching away from Cortex-A53 codegen restores the expected
> > > performance.
> >
> > The issue is due to inefficient code generated for unsigned modulo:
> >
> > umull x0, w0, w4
> > umull x1, w1, w4
> > lsr x0, x0, 32
> > lsr x1, x1, 32
> > lsr w0, w0, 6
> > lsr w1, w1, 6
> >
> > It seems the Cortex-A53 scheduler isn't modelling this correctly. When I
> > manually remove the redundant shifts I get a 15% speedup. I'll have a look.
>
> See https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01415.html
The redundant LSRs and SDIV are removed on latest trunk. Although my patch
above hasn't gone in, I get a 15% speedup on Cortex-A53 with -mcpu=cortex-a53
and 8% with -mcpu=cortex-a72.
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Subject: [Bug lto/63407] xsdcxx built with LTO aborts on xsd files of libkolabxml - when LTO is disabled problem is gone
Date: Fri, 05 May 2017 11:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63407
Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi. Sorry for waiting for such a long time. Anyhow, unfortunately I can't build
and link the pre-processed files. However I can build openSUSE package with
-flto and I'll need a test-case how can I trigger the segmentation fault?
Can you please try to reproduce it with latest GCC?
>From gcc-bugs-return-562653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 11:38:56 2017
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From: "mathias at gaunard dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80642] New: lambdas made constexpr in cases where they don't satisfy the requirements for it
Date: Fri, 05 May 2017 11:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80642
Bug ID: 80642
Summary: lambdas made constexpr in cases where they don't
satisfy the requirements for it
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mathias at gaunard dot com
Target Milestone: ---
Since C++17, lambdas are automatically constexpr whenever they can.
It seems however that GCC 7.1 tries to make lambdas constexpr in cases where it
actually can not.
Testcase, built with -std=c++1z
#include <array>
int main()
{
[](auto&& i)
{
if(i)
{
std::array<char, 4> array;
return i + array.size();
}
return i;
}(std::size_t(0));
}
Expected behaviour: everything compiles fine
What I get instead:
test.cpp: In instantiation of ‘main()::<lambda(auto:1&&)> [with auto:1 = long
unsigned int]’:
test.cpp:13:21: required from here
test.cpp:9:33: error: uninitialized variable ‘array’ in ‘constexpr’ function
std::array<char, 4> array;
^~~~~
In file included from test.cpp:1:0:
/usr/local/gcc-7.1.0/include/c++/7.1.0/array:94:12: note: ‘struct
std::array<char, 4>’ has no user-provided default constructor
struct array
^~~~~
/usr/local/gcc-7.1.0/include/c++/7.1.0/array:110:56: note: and the
implicitly-defined constructor does not initialize ‘char std::array<char,
4>::_M_elems [4]’
typename _AT_Type::_Type _M_elems;
^~~~~~~~
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Subject: [Bug c++/80642] lambdas made constexpr in cases where they don't satisfy the requirements for it
Date: Fri, 05 May 2017 11:59:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-562655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 11:59:55 2017
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From: "nicolas@morey-chaisemartin.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80640] Missing memory side effect
Date: Fri, 05 May 2017 12:13:00 -0000
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--- Comment #2 from Nicolas Morey-Chaisemartin <nicolas@morey-chaisemartin.com> ---
Created attachment 41325
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41325&action=edit
Test case
Previous tarball was too big. I stripped all debug info from the lib and it
should work now :)
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 13:09:00 -0000
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--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
The warning comes from
_Z3setiD.6701 (maybe_a$D6763$m_dummy_6);
which is protected by
_9 = VIEW_CONVERT_EXPR<boolD.2220>(maybe_a$4_7);
if (_9 != 0)
with
# maybe_a$D6763$m_dummy_6 = PHI <maybe_a$D6763$m_dummy_4(D)(6), _5(4)>
# maybe_a$4_7 = PHI <0(6), 1(4)>
In this case, more aggressive threading would kill the possibility to call set
on something undefined (I believe Jeff was already looking into it for other
Wmaybe-uninitialized testcases). The warning is unstable because it depends on
fragile optimization results.
This isn't solvable in general anyway, Wmaybe-uninitialized has "maybe" for a
good reason.
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
Date: Fri, 05 May 2017 13:17:00 -0000
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Backtrace from gdb is more complete:
...
(gdb) bt
#0 0x00007ffff67811e2 in ?? () from /lib/libc.so.6
#1 0x00000000027412bd in libiberty_vprintf_buffer_size (format=0x2752b6b
"%s:%d["00"]", args=0x7fffffffbe70)
at src/libiberty/vprintf-support.c:105
#2 0x000000000274100f in xvasprintf (format=0x2752b6b "%s:%d["00"]",
args=0x7fffffffbe70)
at src/libiberty/xvasprintf.c:57
#3 0x0000000002740c57 in xasprintf (fmt=0x2752b6b "%s:%d["00"]")
at src/libiberty/xasprintf.c:47
#4 0x00000000008b7d51 in internal_error_function (context=0x3ba4da0
<global_diagnostic_context>,
msgid=0x2f9bf9f "in %s, at %s:%d["00"]", ap=0x7fffffffc220)
at src/gcc/ada/gcc-interface/misc.c:336
#5 0x00000000026acb91 in diagnostic_report_diagnostic (context=0x3ba4da0
<global_diagnostic_context>,
diagnostic=0x7fffffffc120) at src/gcc/diagnostic.c:900
#6 0x00000000026ad345 in diagnostic_impl(rich_location *, int, const char *,
va_list *, <anonymous enum>) (
richloc=0x7fffffffc190, opt=-1, gmsgid=0x2f9bf9f "in %s, at %s:%d["00"]",
ap=0x7fffffffc220, kind=DK_ICE)
at src/gcc/diagnostic.c:1054
#7 0x00000000026ae85f in internal_error (gmsgid=0x2f9bf9f "in %s, at
%s:%d["00"]")
at src/gcc/diagnostic.c:1365
#8 0x00000000026aeae3 in fancy_abort (
file=0x2750690 "src/gcc/ada/raise.c["00"]", line=87,
function=0x27507e0 <__gnat_eh_personality::__FUNCTION__>
"__gnat_eh_personality["00"]")
at src/gcc/diagnostic.c:1431
#9 0x000000000087ffee in __gnat_eh_personality ()
at src/gcc/ada/raise.c:87
#10 0x00007ffff69eda43 in _Unwind_RaiseException (exc=0x3d0d2e0)
at /scratch/gcc/w/gcc-4.7.3/linux/gcc-2012.09-90/libgcc/unwind.inc:113
#11 0x000000000088124f in __gnat_Unwind_RaiseException (e=0x3d0d2e0)
at src/gcc/ada/raise-gcc.c:1426
#12 0x000000000094fc7a in
ada.exceptions.exception_propagation.propagate_gcc_exception
(gcc_exception=0x0)
at src/gcc/ada/a-exexpr.adb:322
#13 0x000000000094fcb1 in
ada.exceptions.exception_propagation.propagate_exception (excep=<optimized
out>)
at src/gcc/ada/a-exexpr.adb:354
#14 0x000000000094fcd3 in ada.exceptions.complete_and_propagate_occurrence
(x=0x3d0d320)
at src/gcc/ada/a-except.adb:937
#15 0x0000000000950ccc in <__gnat_raise_exception> (e=0x34fb4a0
<rtsfind.re_not_available>, message=...)
at src/gcc/ada/a-except.adb:978
#16 0x0000000000bca8e1 in rtsfind.load_fail (s=...,
u_id=system_relative_delays, id=ro_rd_delay_for)
at src/gcc/ada/rtsfind.adb:851
#17 0x0000000000bcaad4 in rtsfind.load_rtu (u_id=system_relative_delays,
id=ro_rd_delay_for, use_setting=false)
at src/gcc/ada/rtsfind.adb:987
#18 0x0000000000bcbbe9 in rtsfind.rte ()
at src/gcc/ada/rtsfind.adb:1380
#19 0x0000000000bcc11d in rtsfind.rte_available (e=ro_rd_delay_for)
at src/gcc/ada/rtsfind.adb:1462
#20 0x0000000000a749cb in exp_ch9.expand_n_delay_relative_statement (n=2465)
at src/gcc/ada/exp_ch9.adb:8068
#21 0x0000000000adc8a4 in expander.expand (n=2465)
at src/gcc/ada/expander.adb:214
#22 0x0000000000bff01b in sem.analyze (n=2465)
at src/gcc/ada/sem.adb:753
#23 0x0000000000cb4f0b in sem_ch5.analyze_statements (l=-99999959)
at src/gcc/ada/sem_ch5.adb:3613
#24 0x0000000000cb1849 in sem_ch5.analyze_if_statement (n=2450)
at src/gcc/ada/sem_ch5.adb:1665
#25 0x0000000000bfe7d1 in sem.analyze (n=2450)
at src/gcc/ada/sem.adb:306
#26 0x0000000000cb4f0b in sem_ch5.analyze_statements (l=-99999961)
at src/gcc/ada/sem_ch5.adb:3613
#27 0x0000000000c3257f in sem_ch11.analyze_handled_statements (n=2449)
at src/gcc/ada/sem_ch11.adb:426
#28 0x0000000000bfe79b in sem.analyze (n=2449)
at src/gcc/ada/sem.adb:297
#29 0x0000000000cba9ee in sem_ch6.analyze_subprogram_body_helper ()
at src/gcc/ada/sem_ch6.adb:4245
#30 0x0000000000cb9064 in sem_ch6.analyze_subprogram_body (n=2335)
at src/gcc/ada/sem_ch6.adb:2169
#31 0x0000000000bfed78 in sem.analyze (n=2335)
at src/gcc/ada/sem.adb:547
#32 0x0000000000c778f4 in sem_ch3.analyze_declarations (l=-99999982)
at src/gcc/ada/sem_ch3.adb:2608
#33 0x0000000000cca6c0 in sem_ch7.analyze_package_body_helper (n=2296)
at src/gcc/ada/sem_ch7.adb:786
#34 0x0000000000cc9c9a in sem_ch7.analyze_package_body (n=2296)
at src/gcc/ada/sem_ch7.adb:178
#35 0x0000000000bfeb0d in sem.analyze (n=2296)
at src/gcc/ada/sem.adb:444
#36 0x0000000000c2899a in sem_ch10.analyze_compilation_unit (n=2269)
at src/gcc/ada/sem_ch10.adb:897
#37 0x0000000000bfe4dd in sem.analyze (n=2269)
at src/gcc/ada/sem.adb:180
#38 0x0000000000bffbe6 in sem.semantics.do_analyze ()
at src/gcc/ada/sem.adb:1338
#39 0x0000000000c00026 in sem.semantics ()
at src/gcc/ada/sem.adb:1520
#40 0x0000000000afa798 in frontend ()
at src/gcc/ada/frontend.adb:407
#41 0x0000000000e0ae21 in gnat1drv ()
at src/gcc/ada/gnat1drv.adb:1127
#42 0x00000000008b7694 in gnat_parse_file ()
at src/gcc/ada/gcc-interface/misc.c:122
#43 0x000000000159198a in compile_file ()
at src/gcc/toplev.c:467
#44 0x0000000001593f94 in do_compile () at src/gcc/toplev.c:2003
#45 0x0000000001594327 in toplev::main (this=0x7fffffffde30, argc=21,
argv=0x7fffffffdf38)
at src/gcc/toplev.c:2137
#46 0x000000000268e0cb in main (argc=21, argv=0x7fffffffdf38)
at src/gcc/main.c:39
...
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
Date: Fri, 05 May 2017 13:19:00 -0000
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #7)
> Backtrace from gdb is more complete:
Backtrace looks similar to PR 80556 comment 3. Problem in that PR also is with
g-exptty.adb.
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
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Tom de Vries <vries at gcc dot gnu.org> changed:
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CC| |vries at gcc dot gnu.org
--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
PR80590 could be a non-darwin duplicate.
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Subject: [Bug tree-optimization/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Fri, 05 May 2017 13:23:00 -0000
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--- Comment #8 from prathamesh3492 at gcc dot gnu.org ---
Author: prathamesh3492
Date: Fri May 5 13:21:28 2017
New Revision: 247635
URL: https://gcc.gnu.org/viewcvs?rev=247635&root=gcc&view=rev
Log:
2017-05-05 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR tree-optimization/80613
* tree-ssa-dce.c (propagate_necessity): Remove cases for
BUILT_IN_STRDUP and BUILT_IN_STRNDUP.
testsuite/
* gcc.dg/tree-ssa/pr79697.c (k): Remove.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr79697.c
trunk/gcc/tree-ssa-dce.c
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Subject: [Bug tree-optimization/80613] [8 Regression] ICE in is_gimple_reg_type with -O2
Date: Fri, 05 May 2017 13:37:00 -0000
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--- Comment #9 from prathamesh3492 at gcc dot gnu.org ---
As suggested by Richard, the commit partially reverts r247407 by removing the
hunk from propagate_necessity().
Thanks,
Prathamesh
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Subject: [Bug c/80640] Missing memory side effect
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The issue boils down to just
void f(int *p)
{
while (*p)
__atomic_thread_fence(2);
}
which with -O2 -fno-tree-ter is compiled to
f:
movl (%rdi), %eax # *p_3(D), _4
.L6:
testl %eax, %eax # _4
jne .L6 #,
rep ret
the .optimized dump looks as expected, but then __atomic_thread_fence(2) is
expanded into nothing, so the load is hoisted during RTL transforms.
Note that the source declares opal_list_next as
volatile struct opal_list_item_t *opal_list_next;
but the 'volatile' qualifier applies to the pointed-to struct, not the field
itself. If written as
volatile struct opal_list_item_t *volatile opal_list_next;
then the problematic hoisting does not happen.
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Subject: [Bug c/80640] Missing memory side effect
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--- Comment #4 from Nicolas Morey-Chaisemartin <nicolas@morey-chaisemartin.com> ---
I agree the volatile shoud fix thing> I'll have to see with the ompi guys to
fix that.
But shouldn't __atomic_thread_fence () have a side effect here and force the
memory to be reloaded ?
If it has no impact, what's the point ?
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Subject: [Bug debug/80628] gcc 7.1.0 produces duplicate entries in .debug_gnu_pubtypes table
Date: Fri, 05 May 2017 14:11:00 -0000
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--- Comment #1 from George R. <georgerim at gmail dot com> ---
Created attachment 41326
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41326&action=edit
Preproccessed source file.
Added preprocessed source file.
Use:
1) gcc UnifyFunctionExitNodes.cpp -c -ggnu-pubnames -gsplit-dwarf
2) objdump UnifyFunctionExitNodes.o --dwarf=pubtypes
3) observe duplicates.
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Subject: [Bug c/80640] Missing memory side effect
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--- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think the bug is that on x86 __atomic_thread_fence(x) is expanded into
nothing for x!=__ATOMIC_SEQ_CST, it should place a compiler barrier similar to
expansion of __atomic_signal_fence.
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Subject: [Bug debug/80263] gcc's internal type "sizetype" leaks out as base type name in the DWARF info
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Something like __builtin_unreachable() to say "trust me" would be nice, but I
can't think how to do it. So maybe we just want to use a #pragma around the
std::optional destructor to suppress this warning.
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From: "nicolas@morey-chaisemartin.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80640] Missing memory side effect
Date: Fri, 05 May 2017 15:04:00 -0000
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--- Comment #6 from Nicolas Morey-Chaisemartin <nicolas@morey-chaisemartin.com> ---
Ok. So there's something wrong :)
I'll make a work around for SUSE while waiting for a fix in GCC
>From gcc-bugs-return-562669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 15:04:18 2017
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Subject: [Bug c++/80641] Warning with std::vector resize in loop
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic,
| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-05
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=79095
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The test case looks very similar to the one in bug 79095.
Improving the optimizer to prevent emitting these excessive memsets is the
ideal goal but in the instances when they do end up in the code, Jeff and I
discussed replacing them with traps instead (for memset under an option so
applications that rely on Physical Address Extension can continue to do so).
>From gcc-bugs-return-562670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 15:04:40 2017
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
Date: Fri, 05 May 2017 15:23:00 -0000
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--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Backtrace looks similar to PR 80556 comment 3. Problem in that PR also is
> with g-exptty.adb.
If it is a duplicate of pr80556, it should start at r247301.
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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CC| |amonakov at gcc dot gnu.org,
| |andi-gcc at firstfloor dot org
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Adding Andi Kleen to bug CC — what should be the way forward here? Somehow
limiting the parallelism degree of tests that invoke perf?
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'm still seeing this and it's extremely annoying, I gotta say.
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From: "palves at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 15:37:00 -0000
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--- Comment #9 from Pedro Alves <palves at redhat dot com> ---
> So maybe we just want to use a #pragma around the std::optional destructor to suppress this warning.
I had tried that last night, but unfortunately it couldn't get it to work,
because the warning triggers in A, not optional<A>. Users of optional<T> have
to put the #pragma around their the Ts (in this case A::~A()). I.e., this
would work:
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
struct A
{
A () : m (get ()) {}
~A () { set (m); } // warns here
int m;
};
#pragma GCC diagnostic pop
I think as we'll use gdb/std::optional more and more, that would become too
unwildy/ugly. My current workaround in gdb is -Wno-error=maybe-uninitialized:
[1] - https://sourceware.org/ml/gdb-patches/2017-05/msg00130.html
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 15:38:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Pedro Alves from comment #9)
> I had tried that last night, but unfortunately it couldn't get it to work,
> because the warning triggers in A, not optional<A>.
Bah! When we want the warning location to be in our headers it's in user code
(like this case) and when we want it in user code it's in our headers (and so
suppressed, like Bug 58876).
Sadly I have no better suggestion than -Wno-error=maybe-uninitialized
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Subject: [Bug target/77728] [5/6 Regression] Miscompilation multiple vector iteration on ARM
Date: Fri, 05 May 2017 15:42:00 -0000
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--- Comment #57 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May 5 15:38:04 2017
New Revision: 247639
URL: https://gcc.gnu.org/viewcvs?rev=247639&root=gcc&view=rev
Log:
PR target/77728
* config/arm/arm.c: Include gimple.h.
(aapcs_layout_arg): Emit -Wpsabi note if arm_needs_doubleword_align
returns negative, increment ncrn if it returned non-zero.
(arm_needs_doubleword_align): Return int instead of bool,
ignore DECL_ALIGN of non-FIELD_DECL TYPE_FIELDS chain
members, but if there is any such non-FIELD_DECL
> PARM_BOUNDARY aligned decl, return -1 instead of false.
(arm_function_arg): Emit -Wpsabi note if arm_needs_doubleword_align
returns negative, increment nregs if it returned non-zero.
(arm_setup_incoming_varargs): Likewise.
(arm_function_arg_boundary): Emit -Wpsabi note if
arm_needs_doubleword_align returns negative, return
DOUBLEWORD_ALIGNMENT if it returned non-zero.
* g++.dg/abi/pr77728-1.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/abi/pr77728-1.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/arm/arm.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/71607] [5/6/7/8 Regression] [ARM] ice due to forbidden enabled attribute dependency on instruction operands
Date: Fri, 05 May 2017 15:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71607
--- Comment #14 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Fri May 5 15:41:28 2017
New Revision: 247640
URL: https://gcc.gnu.org/viewcvs?rev=247640&root=gcc&view=rev
Log:
[ARM] PR71607: Fix ICE when loading constant
2017-05-05 Andre Vieira <andre.simoesdiasvieira@arm.com>
Prakhar Bahuguna <prakhar.bahuguna@arm.com>
gcc/
PR target/71607
* config/arm/arm.md (use_literal_pool): Remove.
(64-bit immediate split): No longer takes cost into consideration
if arm_disable_literal_pool is enabled.
* config/arm/arm.c (arm_tls_referenced_p): Add diagnostic if TLS is
used when arm_disable_literal_pool is enabled.
(arm_max_const_double_inline_cost): Remove use of
arm_disable_literal_pool.
(push_minipool_fix): Add assert.
(arm_reorg): Add return if arm_disable_literal_pool is enabled.
* config/arm/vfp.md (no_literal_pool_df_immediate): New.
(no_literal_pool_sf_immediate): New.
2017-05-05 Andre Vieira <andre.simoesdiasvieira@arm.com>
Thomas Preud'homme <thomas.preudhomme@arm.com>
Prakhar Bahuguna <prakhar.bahuguna@arm.com>
gcc/testsuite/
PR target/71607
* gcc.target/arm/thumb2-slow-flash-data.c: Renamed to ...
* gcc.target/arm/thumb2-slow-flash-data-1.c: ... this.
* gcc.target/arm/thumb2-slow-flash-data-2.c: New.
* gcc.target/arm/thumb2-slow-flash-data-3.c: New.
* gcc.target/arm/thumb2-slow-flash-data-4.c: New.
* gcc.target/arm/thumb2-slow-flash-data-5.c: New.
* gcc.target/arm/tls-disable-literal-pool.c: New.
Added:
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-1.c
- copied, changed from r247638,
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data.c
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-2.c
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-3.c
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-4.c
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-5.c
trunk/gcc/testsuite/gcc.target/arm/tls-disable-literal-pool.c
Removed:
trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/config/arm/arm.md
trunk/gcc/config/arm/vfp.md
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80558] VRP not handling x & -2 well
Date: Fri, 05 May 2017 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80558
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 15:43:22 2017
New Revision: 247641
URL: https://gcc.gnu.org/viewcvs?rev=247641&root=gcc&view=rev
Log:
PR tree-optimization/80558
* tree-vrp.c (extract_range_from_binary_expr_1): Optimize
[x, y] op z into [x op, y op z] for op & or | if conditions
are met.
* gcc.dg/tree-ssa/vrp115.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp115.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/80558] VRP not handling x & -2 well
Date: Fri, 05 May 2017 16:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80632] [8 Regression] error: invalid PHI argument with -O2
Date: Fri, 05 May 2017 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80632
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 16:02:44 2017
New Revision: 247642
URL: https://gcc.gnu.org/viewcvs?rev=247642&root=gcc&view=rev
Log:
PR tree-optimization/80632
* tree-switch-conversion.c (struct switch_conv_info): Add target_vop
field.
(build_arrays): Initialize it for virtual phis.
(fix_phi_nodes): Use it for virtual phis.
* gcc.dg/pr80632.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr80632.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-switch-conversion.c
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Fri, 05 May 2017 16:32:00 -0000
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Carlo Wood <carlo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |carlo at gcc dot gnu.org
Version|4.9.2 |8.0
--- Comment #3 from Carlo Wood <carlo at gcc dot gnu.org> ---
Still present in 7.x and 8 (HEAD).
clang does not show this behavior (no leak).
Possibly related:
https://wandbox.org/permlink/yJM4fr9Z9D8GN6on
which also shows different behavior from clang
(found on https://akrzemi1.wordpress.com/2017/04/27/a-serious-bug-in-gcc/)
Can anyone confirm that the keyword 'wrong-code' also
applies to that latter example?
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80643] New: NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Fri, 05 May 2017 16:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80643
Bug ID: 80643
Summary: NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c
gcc.dg/pr79223.c
gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: thopre01 at gcc dot gnu.org
CC: msebor at gcc dot gnu.org
Target Milestone: ---
Target: arm-none-eabi
Hi,
The following testcases regressed or are new FAIL on arm-none-eabi targets
(such as -mcpu=cortex-m0, the last one FAILing only on that specific target) I
believe because of r247622:
NA->FAIL: gcc.dg/pr79214.c
NA->FAIL: gcc.dg/pr79222.c
NA->FAIL: gcc.dg/pr79223.c
PASS->FAIL: gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
PASS->FAIL: c-c++-common/Wsizeof-pointer-memaccess2.c
Note that, unlike PASS->FAIL for gcc.dg/pr78138.c, the FAILs are still there if
I fix the obvious missing colon after the name of the function
The log for the errors is as follows:
NA->FAIL: gcc.dg/pr79214.c
In file included from gcc/gcc/testsuite/gcc.dg/pr79214.c:6:0:^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_bzero':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:25:3: warning: '__builtin_bzero': writing 4
or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_memcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:30:3: warning: '__builtin_memcpy': writing 4
or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_memmove':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:35:3: warning: '__builtin_memmove': writing
4 or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_mempcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:40:3: warning: '__builtin_mempcpy': writing
4 or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_memset':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:45:3: warning: '__builtin_memset': writing 4
or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_strcat':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:52:3: warning: '__builtin_strcat': writing
between 4 and 5 bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_stpcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:59:10: warning: '__builtin_stpcpy': writing
between 4 and 5 bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_stpncpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:66:10: warning: '__builtin_stpncpy': writing
4 or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_strcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:73:10: warning: '__builtin_strcpy': writing
between 4 and 5 bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_strncpy':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:80:10: warning: '__builtin_strncpy': writing
4 or more bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79214.c: In function 'test_strncat':^M
gcc/gcc/testsuite/gcc.dg/pr79214.c:87:10: warning: '__builtin_strncat':
specified bound between 4 and 4294967295 exceeds destination size 3
[-Wstringop-overflow=]^M
NA->FAIL: gcc.dg/pr79222.c
gcc/gcc/testsuite/gcc.dg/pr79222.c: In function 'f':^M
gcc/gcc/testsuite/gcc.dg/pr79222.c:12:10: warning: 'stpcpy': writing between 9
and 11 bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
NA->FAIL: gcc.dg/pr79223.c
gcc/gcc/testsuite/gcc.dg/pr79223.c: In function 'test_memcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79223.c:26:3: warning: 'memcpy': writing 4 or more
bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79223.c: In function 'test_mempcpy':^M
gcc/gcc/testsuite/gcc.dg/pr79223.c:31:3: warning: 'mempcpy': writing 4 or more
bytes into a region of size 3 overflows the destination
[-Wstringop-overflow=]^M
gcc/gcc/testsuite/gcc.dg/pr79223.c: In function 'test_memmove':^M
gcc/gcc/testsuite/gcc.dg/pr79223.c:36:3: warning: 'memmove': writing 4 or more
bytes into a region of size 2 overflows the destination
[-Wstringop-overflow=]^M
PASS->FAIL: gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
gcc/gcc/testsuite/gcc.dg/tree-ssa/builtins-folding-gimple-ub.c:15:7: warning:
'__builtin_memchr' reading 1000 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/gcc/testsuite/gcc.dg/tree-ssa/builtins-folding-gimple-ub.c:17:7: warning:
'__builtin_memchr' reading 1000 bytes from a region of size 12
[-Wstringop-overflow=]
PASS->FAIL: c-c++-common/Wsizeof-pointer-memaccess2.c
Excess errors:
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
>From gcc-bugs-return-562682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 16:42:04 2017
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From: "andi-gcc at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
Date: Fri, 05 May 2017 17:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77684
--- Comment #4 from Andi Kleen <andi-gcc at firstfloor dot org> ---
Thanks for tracing that down.
So perf runs out of memory for the locked trace buffers
Increasing the limit is a good workaround
ulimit -l may also work, but also needs root.
We could just pass a smaller -m value to perf
Does it work when you change the last line in config/i386/gcc-auto-profile
to add -m 128k
(or possibly other values, have to be power of two)
>From gcc-bugs-return-562683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 17:07:40 2017
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80644] New: [8 regression] many test cases fails starting with 247622
Date: Fri, 05 May 2017 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80644
Bug ID: 80644
Summary: [8 regression] many test cases fails starting with
247622
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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All these tests fail now on powerpc64 LE. From the details it looks like they
all are triggering overflow warnings from -Wstringop-overflow=.
> FAIL: gcc.dg/pr78138.c (test for warnings, line 23)
> FAIL: gcc.dg/pr78138.c (test for excess errors)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 25)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 30)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 35)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 40)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 45)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 52)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 59)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 66)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 73)
> FAIL: gcc.dg/pr79214.c (test for warnings, line 80)
> FAIL: gcc.dg/pr79214.c (test for excess errors)
> FAIL: gcc.dg/pr79222.c (test for warnings, line 12)
> FAIL: gcc.dg/pr79222.c (test for excess errors)
> FAIL: gcc.dg/pr79223.c (test for warnings, line 26)
> FAIL: gcc.dg/pr79223.c (test for warnings, line 31)
> FAIL: gcc.dg/pr79223.c (test for warnings, line 36)
> FAIL: gcc.dg/pr79223.c (test for excess errors)
> FAIL: gcc.dg/tree-ssa/builtins-folding-gimple-ub.c (test for excess errors)
> FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
> FAIL: gfortran.dg/elemental_subroutine_3.f90 -O2 (test for excess errors)
> FAIL: gfortran.dg/elemental_subroutine_3.f90 -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (test for excess errors)
> FAIL: gfortran.dg/elemental_subroutine_3.f90 -O3 -g (test for excess errors)
> FAIL: gfortran.dg/elemental_subroutine_3.f90 -Os (test for excess errors)
> FAIL: gfortran.dg/mvbits_7.f90 -O0 (test for warnings, line 28)
Some details below
spawn /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -Wformat-overflow -S
-o pr78138.s
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c: In function 'f':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c:15:3: warning:
'strcpy': writing between 6 and 7 bytes into a region of size 5 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c: In function 'g':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c:23:3: warning:
'memcpy': writing between 7 and 32 bytes into a region of size 5 overflows the
destination [-Wstringop-overflow=]
output is:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c: In function 'f':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c:15:3: warning:
'strcpy': writing between 6 and 7 bytes into a region of size 5 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c: In function 'g':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c:23:3: warning:
'memcpy': writing between 7 and 32 bytes into a region of size 5 overflows the
destination [-Wstringop-overflow=]
PASS: gcc.dg/pr78138.c (test for warnings, line 15)
FAIL: gcc.dg/pr78138.c (test for warnings, line 23)
FAIL: gcc.dg/pr78138.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr78138.c:23:3: warning:
'memcpy': writing between 7 and 32 bytes into a region of size 5 overflows the
destination [-Wstringop-overflow=]
spawn /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -S -o pr79214.s
In file included from
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:6:0:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_bzero':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:25:3: warning:
'__builtin_bzero': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:30:3: warning:
'__builtin_memcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memmove':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:35:3: warning:
'__builtin_memmove': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_mempcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:40:3: warning:
'__builtin_mempcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memset':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:45:3: warning:
'__builtin_memset': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strcat':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:52:3: warning:
'__builtin_strcat': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_stpcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:59:10: warning:
'__builtin_stpcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_stpncpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:66:10: warning:
'__builtin_stpncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:73:10: warning:
'__builtin_strcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strncpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:80:10: warning:
'__builtin_strncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strncat':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:87:10: warning:
'__builtin_strncat': specified bound between 4 and 18446744073709551615 exceeds
destination size 3 [-Wstringop-overflow=]
output is:
In file included from
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:6:0:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_bzero':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:25:3: warning:
'__builtin_bzero': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:30:3: warning:
'__builtin_memcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memmove':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:35:3: warning:
'__builtin_memmove': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_mempcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:40:3: warning:
'__builtin_mempcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_memset':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:45:3: warning:
'__builtin_memset': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strcat':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:52:3: warning:
'__builtin_strcat': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_stpcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:59:10: warning:
'__builtin_stpcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_stpncpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:66:10: warning:
'__builtin_stpncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:73:10: warning:
'__builtin_strcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strncpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:80:10: warning:
'__builtin_strncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c: In function
'test_strncat':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:87:10: warning:
'__builtin_strncat': specified bound between 4 and 18446744073709551615 exceeds
destination size 3 [-Wstringop-overflow=]
FAIL: gcc.dg/pr79214.c (test for warnings, line 25)
FAIL: gcc.dg/pr79214.c (test for warnings, line 30)
FAIL: gcc.dg/pr79214.c (test for warnings, line 35)
FAIL: gcc.dg/pr79214.c (test for warnings, line 40)
FAIL: gcc.dg/pr79214.c (test for warnings, line 45)
FAIL: gcc.dg/pr79214.c (test for warnings, line 52)
FAIL: gcc.dg/pr79214.c (test for warnings, line 59)
FAIL: gcc.dg/pr79214.c (test for warnings, line 66)
FAIL: gcc.dg/pr79214.c (test for warnings, line 73)
FAIL: gcc.dg/pr79214.c (test for warnings, line 80)
PASS: gcc.dg/pr79214.c (test for warnings, line 87)
FAIL: gcc.dg/pr79214.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:25:3: warning:
'__builtin_bzero': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:30:3: warning:
'__builtin_memcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:35:3: warning:
'__builtin_memmove': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:40:3: warning:
'__builtin_mempcpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:45:3: warning:
'__builtin_memset': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:52:3: warning:
'__builtin_strcat': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:59:10: warning:
'__builtin_stpcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:66:10: warning:
'__builtin_stpncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:73:10: warning:
'__builtin_strcpy': writing between 4 and 5 bytes into a region of size 3
overflows the destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79214.c:80:10: warning:
'__builtin_strncpy': writing 4 or more bytes into a region of size 3 overflows
the destination [-Wstringop-overflow=]
Executing on host: /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -S -o pr79222.s
(timeout = 300)
spawn /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -S -o pr79222.s
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c: In function 'f':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c:12:10: warning:
'stpcpy': writing between 9 and 11 bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
output is:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c: In function 'f':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c:12:10: warning:
'stpcpy': writing between 9 and 11 bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
FAIL: gcc.dg/pr79222.c (test for warnings, line 12)
FAIL: gcc.dg/pr79222.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79222.c:12:10: warning:
'stpcpy': writing between 9 and 11 bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
Executing on host: /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -ansi -pedantic-errors
-O2 -Wall -std=gnu99 -S -o pr79223.s (timeout = 300)
spawn /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -ansi -pedantic-errors
-O2 -Wall -std=gnu99 -S -o pr79223.s
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_memcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:26:3: warning:
'memcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_mempcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:31:3: warning:
'mempcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_memmove':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:36:3: warning:
'memmove': writing 4 or more bytes into a region of size 2 overflows the
destination [-Wstringop-overflow=]
output is:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_memcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:26:3: warning:
'memcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_mempcpy':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:31:3: warning:
'mempcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c: In function
'test_memmove':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:36:3: warning:
'memmove': writing 4 or more bytes into a region of size 2 overflows the
destination [-Wstringop-overflow=]
FAIL: gcc.dg/pr79223.c (test for warnings, line 26)
FAIL: gcc.dg/pr79223.c (test for warnings, line 31)
FAIL: gcc.dg/pr79223.c (test for warnings, line 36)
FAIL: gcc.dg/pr79223.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:26:3: warning:
'memcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:31:3: warning:
'mempcpy': writing 4 or more bytes into a region of size 3 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr79223.c:36:3: warning:
'memmove': writing 4 or more bytes into a region of size 2 overflows the
destination [-Wstringop-overflow=]
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Fri, 05 May 2017 17:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-05
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 see some of the same failures even on x86_64 where I tested. Something must
have gone wrong with the commit last night. Let me look into it.
>From gcc-bugs-return-562685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 17:16:13 2017
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Subject: [Bug middle-end/80644] [8 regression] many test cases fails starting with 247622
Date: Fri, 05 May 2017 17:16:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I must have messed something up when I committed the change last night. I'm
looking into it (please see bug 80643 for status).
*** This bug has been marked as a duplicate of bug 80643 ***
>From gcc-bugs-return-562686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 17:16:16 2017
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Fri, 05 May 2017 18:11:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 80644 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-562687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 18:11:29 2017
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Fri, 05 May 2017 19:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The failures should be fixed in r247652
(https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00443.html).
>From gcc-bugs-return-562688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 19:52:15 2017
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Subject: [Bug fortran/80645] New: [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Fri, 05 May 2017 19:54:00 -0000
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Bug ID: 80645
Summary: [8 regression] FAIL:
gfortran.dg/elemental_subroutine_3.f90 -O1 (test
for excess errors)
Product: gcc
Version: 8.0
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Target: m68k-*-*
$ gcc/gfortran -Bgcc/ ../gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90
-O -S
../gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90:37:0:
x(4:1:-1) = x((/1,3,2,4/))
Warning: ‘__builtin_memcpy’ reading 16 bytes from a region of size 12
[-Wstringop-overflow=]
From the original dump:
parm.11.dtype = 297;
parm.11.dim[0].lbound = 0;
parm.11.dim[0].ubound = 3;
parm.11.dim[0].stride = -1;
parm.11.data = (void *) &x[3];
parm.11.offset = 0;
....
D.958 = (void * restrict) __builtin_malloc (16);
data.13 = (struct mytype *) D.958;
(void) __builtin_memcpy ((void *) data.13, parm.11.data, 16);
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Fri, 05 May 2017 20:10:00 -0000
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--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #8)
> Something like __builtin_unreachable() to say "trust me" would be nice, but
> I can't think how to do it.
Some __builtin_unreachable() in _M_get might (?) be useful even if it doesn't
help with the destructor issue. Or some assertion for debug mode, since the
comment above says "The _M_get operations have _M_engaged as a precondition"...
(In reply to Jonathan Wakely from comment #10)
> Sadly I have no better suggestion than -Wno-error=maybe-uninitialized
Move -Wmaybe-uninitialized from -Wall to -Wextra?
>From gcc-bugs-return-562690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 20:10:00 2017
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Subject: [Bug fortran/80392] [5/6/7/8 Regression] [OOP] ICE with allocatable polymorphic function result in a procedure pointer component
Date: Fri, 05 May 2017 20:15:00 -0000
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--- Comment #10 from janus at gcc dot gnu.org ---
Author: janus
Date: Fri May 5 20:09:20 2017
New Revision: 247655
URL: https://gcc.gnu.org/viewcvs?rev=247655&root=gcc&view=rev
Log:
2017-05-05 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/80392
* trans-types.c (gfc_get_derived_type): Prevent an infinite loop when
building a derived type that includes a procedure pointer component
with a polymorphic result.
2017-05-05 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/80392
* gfortran.dg/proc_ptr_comp_49.f90: New test case.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/proc_ptr_comp_49.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/trans-types.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "damian at sourceryinstitute dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80260] [7/8 Regression] ICE with polymorphic array section actual argument
Date: Fri, 05 May 2017 20:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80260
--- Comment #3 from Damian Rouson <damian at sourceryinstitute dot org> ---
The same code causes an ICE with the 7.1.0 release. Is there a fix on the 8
branch or any related updates?
>From gcc-bugs-return-562694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 20:21:58 2017
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Subject: [Bug target/79203] Update PowerPC double->int conversions to know about -mvsx-small-integer
Date: Fri, 05 May 2017 20:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79203
--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 5 20:21:15 2017
New Revision: 247657
URL: https://gcc.gnu.org/viewcvs?rev=247657&root=gcc&view=rev
Log:
[gcc]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
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Subject: [Bug target/79038] Improve PowerPC ISA 3.0 conversion between integers and hardware _Float128
Date: Fri, 05 May 2017 20:21:00 -0000
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--- Comment #7 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 5 20:21:15 2017
New Revision: 247657
URL: https://gcc.gnu.org/viewcvs?rev=247657&root=gcc&view=rev
Log:
[gcc]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
>From gcc-bugs-return-562692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 20:16:23 2017
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Subject: [Bug fortran/80392] [5/6/7/8 Regression] [OOP] ICE with allocatable polymorphic function result in a procedure pointer component
Date: Fri, 05 May 2017 20:21:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|7.2 |5.5
--- Comment #11 from janus at gcc dot gnu.org ---
Fixed on trunk and all active release branches (for the upcoming releases 5.5,
6.4, 7.2 and 8.0). Closing.
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Subject: [Bug target/79202] On Power8, consider using vupkhsw/xxpermdi to sign extend an int in a vector register instead of mfvsrwz/mtvsrwa
Date: Fri, 05 May 2017 21:01:00 -0000
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--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 5 20:21:15 2017
New Revision: 247657
URL: https://gcc.gnu.org/viewcvs?rev=247657&root=gcc&view=rev
Log:
[gcc]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
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Subject: [Bug fortran/80121] Memory leak with derived-type intent(out) argument
Date: Fri, 05 May 2017 21:05:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #15 from janus at gcc dot gnu.org ---
Fix on trunk and 7-branch (for GCC 7.2). Closing.
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Subject: [Bug fortran/80121] Memory leak with derived-type intent(out) argument
Date: Fri, 05 May 2017 21:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80121
--- Comment #14 from janus at gcc dot gnu.org ---
Author: janus
Date: Fri May 5 21:00:53 2017
New Revision: 247662
URL: https://gcc.gnu.org/viewcvs?rev=247662&root=gcc&view=rev
Log:
2017-05-05 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/80121
* trans-expr.c (gfc_conv_procedure_call): Deallocate the components
of allocatable intent(out) arguments.
2017-05-05 Janus Weil <janus@gcc.gnu.org>
Backport from trunk
PR fortran/80121
* gfortran.dg/intent_out_9.f90: New test case.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/intent_out_9.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/trans-expr.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/68800] Fortran FE produces many memory leaks
Date: Fri, 05 May 2017 21:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68800
Bug 68800 depends on bug 80121, which changed state.
Bug 80121 Summary: Memory leak with derived-type intent(out) argument
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80121
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/80121] Memory leak with derived-type intent(out) argument
Date: Fri, 05 May 2017 21:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80121
janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.0 |7.2
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Subject: [Bug c++/79512] [6 Regression] ICE: Segfault in gimple_build_call_1, at gimple.c:218
Date: Fri, 05 May 2017 21:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79512
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:23:09 2017
New Revision: 247667
URL: https://gcc.gnu.org/viewcvs?rev=247667&root=gcc&view=rev
Log:
Backported from mainline
2017-02-16 Jakub Jelinek <jakub@redhat.com>
PR c++/79512
* c-parser.c (c_parser_omp_target): For -fopenmp-simd
ignore #pragma omp target even when not followed by identifier.
* parser.c (cp_parser_omp_target): For -fopenmp-simd
ignore #pragma omp target even when not followed by identifier.
* c-c++-common/gomp/pr79512.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/gomp/pr79512.c
Modified:
branches/gcc-6-branch/gcc/c/ChangeLog
branches/gcc-6-branch/gcc/c/c-parser.c
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/parser.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79559] [5/6 Regression] ICE in ix86_print_operand, at config/i386/i386.c:18189
Date: Fri, 05 May 2017 21:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79559
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:24:50 2017
New Revision: 247668
URL: https://gcc.gnu.org/viewcvs?rev=247668&root=gcc&view=rev
Log:
Backported from mainline
2017-02-18 Jakub Jelinek <jakub@redhat.com>
PR target/79559
* config/i386/i386.c (ix86_print_operand): Use output_operand_lossage
instead of gcc_assert for K, r and R code checks. Formatting fixes.
* gcc.target/i386/pr79559.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79559.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/79568] ICE in extract_insn, at recog.c:2311 for pr70325.c (with -mavx512bw)
Date: Fri, 05 May 2017 21:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79568
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:25:59 2017
New Revision: 247669
URL: https://gcc.gnu.org/viewcvs?rev=247669&root=gcc&view=rev
Log:
Backported from mainline
2017-02-20 Jakub Jelinek <jakub@redhat.com>
PR target/79568
* config/i386/i386.c (ix86_expand_builtin): Handle
OPTION_MASK_ISA_AVX512VL and OPTION_MASK_ISA_64BIT in
ix86_builtins_isa[fcode].isa as a requirement of those
flags and any other flag in the bitmask.
(ix86_init_mmx_sse_builtins): Use 0 instead of
~OPTION_MASK_ISA_64BIT as mask.
* config/i386/i386-builtin.def (bdesc_special_args,
bdesc_args): Likewise.
* gcc.target/i386/pr79568-1.c: New test.
* gcc.target/i386/pr79568-2.c: New test.
* gcc.target/i386/pr79568-3.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79568-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79568-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79568-3.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79494] [5/6 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
Date: Fri, 05 May 2017 21:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79494
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:27:17 2017
New Revision: 247670
URL: https://gcc.gnu.org/viewcvs?rev=247670&root=gcc&view=rev
Log:
Backported from mainline
2017-02-21 Jakub Jelinek <jakub@redhat.com>
PR target/79494
* config/i386/i386.c (ix86_expand_split_stack_prologue): Call
make_reg_eh_region_note_nothrow_nononlocal on call_insn.
* config/rs6000/rs6000.c: Include except.h.
(rs6000_expand_split_stack_prologue): Call
make_reg_eh_region_note_nothrow_nononlocal on the call insn.
* gcc.dg/pr79494.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr79494.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/rs6000/rs6000.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/79641] [5/6 Regression] ICE with const variable and attribute
Date: Fri, 05 May 2017 21:29:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:28:09 2017
New Revision: 247672
URL: https://gcc.gnu.org/viewcvs?rev=247672&root=gcc&view=rev
Log:
Backported from mainline
2017-02-21 Jakub Jelinek <jakub@redhat.com>
PR c++/79641
* c-common.c (handle_mode_attribute): Use build_qualified_type to
preserve quals.
* c-c++-common/pr79641.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/pr79641.c
Modified:
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-common.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79570] [5/6 Regression] ICE in sel-sched-ir.c:4534 in pr69956.c
Date: Fri, 05 May 2017 21:30:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:29:10 2017
New Revision: 247673
URL: https://gcc.gnu.org/viewcvs?rev=247673&root=gcc&view=rev
Log:
Backported from mainline
2017-02-21 Jakub Jelinek <jakub@redhat.com>
PR target/79570
* sel-sched.c (moveup_expr_cached): Don't call sel_bb_head
on temporarily removed DEBUG_INSNs.
* gcc.dg/pr79570.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr79570.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/sel-sched.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/79639] [6 Regression] ICE with -O and constexpr
Date: Fri, 05 May 2017 21:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79639
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:30:03 2017
New Revision: 247674
URL: https://gcc.gnu.org/viewcvs?rev=247674&root=gcc&view=rev
Log:
Backported from mainline
2017-02-21 Jakub Jelinek <jakub@redhat.com>
PR c++/79639
* constexpr.c (cxx_eval_store_expression): If *valp is a PTRMEM_CST,
call cplus_expand_constant on it first.
* g++.dg/cpp1y/constexpr-79639.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-79639.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/constexpr.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/79664] ICE with #pragma omp parallel in constexpr function
Date: Fri, 05 May 2017 21:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79664
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:31:37 2017
New Revision: 247675
URL: https://gcc.gnu.org/viewcvs?rev=247675&root=gcc&view=rev
Log:
Backported from mainline
2017-02-22 Jakub Jelinek <jakub@redhat.com>
PR c++/79664
* parser.c (cp_parser_omp_teams, cp_parser_omp_target): Use
SET_EXPR_LOCATION on OMP_TARGET/OMP_TEAMS tree.
* constexpr.c (potential_constant_expression_1): Handle
OMP_*, OACC_* and CILK_* trees.
* g++.dg/cpp1y/constexpr-throw.C: Adjust expected diagnostic location.
* g++.dg/gomp/pr79664.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/gomp/pr79664.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/constexpr.c
branches/gcc-6-branch/gcc/cp/parser.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-throw.C
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/79396] [5/6 Regression] ICE (verify_flow_info failed) with -fnon-call-exceptions -O2 -march=haswell
Date: Fri, 05 May 2017 21:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79396
--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:32:50 2017
New Revision: 247676
URL: https://gcc.gnu.org/viewcvs?rev=247676&root=gcc&view=rev
Log:
Backported from mainline
2017-02-25 Jakub Jelinek <jakub@redhat.com>
PR middle-end/79396
* tree-eh.c (operation_could_trap_p, stmt_could_throw_1_p): Handle
FMA_EXPR like tcc_binary or tcc_unary.
* g++.dg/opt/pr79396.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr79396.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79729] [5/6 Regression] ICE in ix86_print_operand, at config/i386/i386.c:18231
Date: Fri, 05 May 2017 21:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79729
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:33:43 2017
New Revision: 247677
URL: https://gcc.gnu.org/viewcvs?rev=247677&root=gcc&view=rev
Log:
Backported from mainline
2017-02-28 Jakub Jelinek <jakub@redhat.com>
PR target/79729
* config/i386/i386.c (ix86_print_operand) <case 'R'>: Replace
gcc_unreachable with output_operand_lossage.
* gcc.target/i386/pr79729.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79729.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/79681] [6 Regression] ICE with constexpr and bitfield
Date: Fri, 05 May 2017 21:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79681
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:34:36 2017
New Revision: 247678
URL: https://gcc.gnu.org/viewcvs?rev=247678&root=gcc&view=rev
Log:
Backported from mainline
2017-03-01 Jakub Jelinek <jakub@redhat.com>
PR c++/79681
* fold-const.c (make_bit_field_ref): If orig_inner is COMPONENT_REF,
attempt to use its first operand as BIT_FIELD_REF base.
* g++.dg/cpp1y/constexpr-79681-1.C: New test.
* g++.dg/cpp1y/constexpr-79681-2.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-1.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/79807] [5/6 Regression] ICE in extract_insn, at recog.c:2311 (error: unrecognizable insn)
Date: Fri, 05 May 2017 21:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79807
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:35:28 2017
New Revision: 247679
URL: https://gcc.gnu.org/viewcvs?rev=247679&root=gcc&view=rev
Log:
Backported from mainline
2017-03-03 Jakub Jelinek <jakub@redhat.com>
PR target/79807
* config/i386/i386.c (ix86_expand_multi_arg_builtin): If target
is a memory operand, increase num_memory.
(ix86_expand_args_builtin): Likewise.
* gcc.target/i386/pr79807.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79807.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/79901] ICE in prepare_cmp_insn, at optabs.c:3904
Date: Fri, 05 May 2017 21:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79901
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:35:58 2017
New Revision: 247680
URL: https://gcc.gnu.org/viewcvs?rev=247680&root=gcc&view=rev
Log:
Backported from mainline
2017-03-07 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/79901
* expr.c (expand_expr_real_2): For vector MIN/MAX, if there is no
min/max expander, expand it using expand_vec_cond_expr.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/expr.c
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Subject: [Bug rtl-optimization/79901] ICE in prepare_cmp_insn, at optabs.c:3904
Date: Fri, 05 May 2017 21:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79901
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:36:54 2017
New Revision: 247681
URL: https://gcc.gnu.org/viewcvs?rev=247681&root=gcc&view=rev
Log:
Backported from mainline
2017-03-07 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/79901
* config/i386/sse.md (*avx512bw_<code><mode>3<mask_name>): Renamed to
...
(*avx512f_<code><mode>3<mask_name>): ... this.
(<code><mode>3 with maxmin code iterator): Use VI8_AVX2_AVX512F
iterator instead of VI8_AVX2_AVX512BW.
* gcc.target/i386/pr79901.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79901.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/sse.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c/79940] [6 Regression] OpenMP pragma - internal compiler error with taskloop
Date: Fri, 05 May 2017 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79940
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:37:47 2017
New Revision: 247682
URL: https://gcc.gnu.org/viewcvs?rev=247682&root=gcc&view=rev
Log:
Backported from mainline
2017-03-08 Jakub Jelinek <jakub@redhat.com>
PR c/79940
* gimplify.c (gimplify_omp_for): Replace index var in outer
taskloop statement with an artificial variable and add
OMP_CLAUSE_PRIVATE clause for it.
* testsuite/libgomp.c/pr79940.c: New test.
Added:
branches/gcc-6-branch/libgomp/testsuite/libgomp.c/pr79940.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimplify.c
branches/gcc-6-branch/libgomp/ChangeLog
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Subject: [Bug target/79932] _mm512_packus_epi32 does not compile under -O0
Date: Fri, 05 May 2017 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79932
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:38:35 2017
New Revision: 247683
URL: https://gcc.gnu.org/viewcvs?rev=247683&root=gcc&view=rev
Log:
Backported from mainline
2017-03-09 Jakub Jelinek <jakub@redhat.com>
PR target/79932
* config/i386/avx512bwintrin.h (_mm512_packs_epi32,
_mm512_maskz_packs_epi32, _mm512_mask_packs_epi32,
_mm512_packus_epi32, _mm512_maskz_packus_epi32,
_mm512_mask_packus_epi32): Move definitions outside of __OPTIMIZE__
guarded section.
* gcc.target/i386/pr79932-1.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79932-1.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/avx512bwintrin.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/79932] _mm512_packus_epi32 does not compile under -O0
Date: Fri, 05 May 2017 21:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79932
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:39:18 2017
New Revision: 247684
URL: https://gcc.gnu.org/viewcvs?rev=247684&root=gcc&view=rev
Log:
Backported from mainline
2017-03-09 Jakub Jelinek <jakub@redhat.com>
PR target/79932
* config/i386/avx512vlintrin.h (_mm256_cmpge_epi32_mask,
_mm256_cmpge_epi64_mask, _mm256_cmpge_epu32_mask,
_mm256_cmpge_epu64_mask, _mm256_cmple_epi32_mask,
_mm256_cmple_epi64_mask, _mm256_cmple_epu32_mask,
_mm256_cmple_epu64_mask, _mm256_cmplt_epi32_mask,
_mm256_cmplt_epi64_mask, _mm256_cmplt_epu32_mask,
_mm256_cmplt_epu64_mask, _mm256_cmpneq_epi32_mask,
_mm256_cmpneq_epi64_mask, _mm256_cmpneq_epu32_mask,
_mm256_cmpneq_epu64_mask, _mm256_mask_cmpge_epi32_mask,
_mm256_mask_cmpge_epi64_mask, _mm256_mask_cmpge_epu32_mask,
_mm256_mask_cmpge_epu64_mask, _mm256_mask_cmple_epi32_mask,
_mm256_mask_cmple_epi64_mask, _mm256_mask_cmple_epu32_mask,
_mm256_mask_cmple_epu64_mask, _mm256_mask_cmplt_epi32_mask,
_mm256_mask_cmplt_epi64_mask, _mm256_mask_cmplt_epu32_mask,
_mm256_mask_cmplt_epu64_mask, _mm256_mask_cmpneq_epi32_mask,
_mm256_mask_cmpneq_epi64_mask, _mm256_mask_cmpneq_epu32_mask,
_mm256_mask_cmpneq_epu64_mask, _mm_cmpge_epi32_mask,
_mm_cmpge_epi64_mask, _mm_cmpge_epu32_mask, _mm_cmpge_epu64_mask,
_mm_cmple_epi32_mask, _mm_cmple_epi64_mask, _mm_cmple_epu32_mask,
_mm_cmple_epu64_mask, _mm_cmplt_epi32_mask, _mm_cmplt_epi64_mask,
_mm_cmplt_epu32_mask, _mm_cmplt_epu64_mask, _mm_cmpneq_epi32_mask,
_mm_cmpneq_epi64_mask, _mm_cmpneq_epu32_mask, _mm_cmpneq_epu64_mask,
_mm_mask_cmpge_epi32_mask, _mm_mask_cmpge_epi64_mask,
_mm_mask_cmpge_epu32_mask, _mm_mask_cmpge_epu64_mask,
_mm_mask_cmple_epi32_mask, _mm_mask_cmple_epi64_mask,
_mm_mask_cmple_epu32_mask, _mm_mask_cmple_epu64_mask,
_mm_mask_cmplt_epi32_mask, _mm_mask_cmplt_epi64_mask,
_mm_mask_cmplt_epu32_mask, _mm_mask_cmplt_epu64_mask,
_mm_mask_cmpneq_epi32_mask, _mm_mask_cmpneq_epi64_mask,
_mm_mask_cmpneq_epu32_mask, _mm_mask_cmpneq_epu64_mask): Move
definitions outside of __OPTIMIZE__ guarded section.
* gcc.target/i386/pr79932-2.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr79932-2.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/avx512vlintrin.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/79944] asan: incorrect instrumentation of atomic operations
Date: Fri, 05 May 2017 21:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79944
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:40:10 2017
New Revision: 247685
URL: https://gcc.gnu.org/viewcvs?rev=247685&root=gcc&view=rev
Log:
Backported from mainline
2017-03-09 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/79944
* asan.c (get_mem_refs_of_builtin_call): For BUILT_IN_ATOMIC* and
BUILT_IN_SYNC*, determine the access type from the size suffix and
always build a MEM_REF with that type. Handle forgotten
BUILT_IN_SYNC_FETCH_AND_NAND_16 and BUILT_IN_SYNC_NAND_AND_FETCH_16.
* c-c++-common/asan/pr79944.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/asan/pr79944.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/asan.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/79896] [5/6 Regression] ICE in gimplify_expr, at gimplify.c:11950 on non-int128 target
Date: Fri, 05 May 2017 21:42:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:41:16 2017
New Revision: 247686
URL: https://gcc.gnu.org/viewcvs?rev=247686&root=gcc&view=rev
Log:
Backported from mainline
2017-03-10 Jakub Jelinek <jakub@redhat.com>
PR c++/79896
* decl.c (finish_enum_value_list): If value is error_mark_node,
don't copy it and change its type.
* init.c (constant_value_1): Return error_mark_node if DECL_INITIAL
of CONST_DECL is error_mark_node.
* g++.dg/ext/int128-5.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/ext/int128-5.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/decl.c
branches/gcc-6-branch/gcc/cp/init.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c/80097] internal compiler error in c_fully_fold_internal with stdÈ9 and -fsanitize=float-divide-by-zero
Date: Fri, 05 May 2017 21:43:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:42:05 2017
New Revision: 247687
URL: https://gcc.gnu.org/viewcvs?rev=247687&root=gcc&view=rev
Log:
Backported from mainline
2017-03-21 Jakub Jelinek <jakub@redhat.com>
PR c/80097
* c-typeck.c (build_binary_op): Add EXCESS_PRECISION_EXPR only around
optional COMPOUND_EXPR with ubsan instrumentation.
* gcc.dg/ubsan/pr80097.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/ubsan/pr80097.c
Modified:
branches/gcc-6-branch/gcc/c/ChangeLog
branches/gcc-6-branch/gcc/c/c-typeck.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80141] ICE with pragma omp declare
Date: Fri, 05 May 2017 21:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80141
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:43:38 2017
New Revision: 247689
URL: https://gcc.gnu.org/viewcvs?rev=247689&root=gcc&view=rev
Log:
Backported from mainline
2017-03-22 Jakub Jelinek <jakub@redhat.com>
PR c++/80141
* semantics.c (finish_omp_clause) <case OMP_CLAUSE_SIMDLEN,
case OMP_CLAUSE_ALIGNED>: Call maybe_constant_value only when not
processing_template_decl.
* g++.dg/gomp/pr80141.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/gomp/pr80141.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/semantics.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80129] wrong code with ternary struct assignment to const
Date: Fri, 05 May 2017 21:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80129
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:42:51 2017
New Revision: 247688
URL: https://gcc.gnu.org/viewcvs?rev=247688&root=gcc&view=rev
Log:
Backported from mainline
2017-03-22 Jakub Jelinek <jakub@redhat.com>
PR c++/80129
* gimplify.c (gimplify_modify_expr_rhs) <case COND_EXPR>: Clear
TREE_READONLY on result if writing it more than once.
* g++.dg/torture/pr80129.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80129.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimplify.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/80112] [5/6 Regression] ICE in doloop_condition_get at loop-doloop.c:158
Date: Fri, 05 May 2017 21:46:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:44:21 2017
New Revision: 247690
URL: https://gcc.gnu.org/viewcvs?rev=247690&root=gcc&view=rev
Log:
Backported from mainline
2017-03-24 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/80112
* loop-doloop.c (doloop_condition_get): Don't check condition
if cmp isn't SET with IF_THEN_ELSE src.
* gcc.dg/pr80112.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80112.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/loop-doloop.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug debug/80025] [5/6 Regression] ICE w/ -O2 (-O3, -Ofast) -g -ftracer (infinite recursion in rtx_equal_for_cselib_1)
Date: Fri, 05 May 2017 21:49:00 -0000
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:48:02 2017
New Revision: 247693
URL: https://gcc.gnu.org/viewcvs?rev=247693&root=gcc&view=rev
Log:
Backported from mainline
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR debug/80025
* cselib.c (cselib_hasher::equal): Pass 0 to rtx_equal_for_cselib_1.
(rtx_equal_for_cselib_1): Add depth argument. If depth
is 128, don't look up VALUE locs and punt. Increment
depth in recursive calls when walking VALUE locs.
* gcc.dg/torture/pr80025.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80025.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/cselib.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/80168] [5/6 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
Date: Fri, 05 May 2017 21:49:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:45:42 2017
New Revision: 247691
URL: https://gcc.gnu.org/viewcvs?rev=247691&root=gcc&view=rev
Log:
Backported from mainline
2017-03-27 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/80168
* asan.c (instrument_derefs): Copy over last operand from
original COMPONENT_REF to the new COMPONENT_REF with
DECL_BIT_FIELD_REPRESENTATIVE.
* ubsan.c (instrument_object_size): Likewise.
* gcc.dg/asan/pr80168.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/asan/pr80168.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/asan.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/ubsan.c
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Subject: [Bug debug/80321] [7 regression] infinite recursion with inlining of nested function and debug info
Date: Fri, 05 May 2017 21:51:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:50:27 2017
New Revision: 247695
URL: https://gcc.gnu.org/viewcvs?rev=247695&root=gcc&view=rev
Log:
Backported from mainline
2017-04-13 Jakub Jelinek <jakub@redhat.com>
PR debug/80321
* dwarf2out.c (decls_for_scope): Ignore declarations of
current_function_decl in BLOCK_NONLOCALIZED_VARS.
* gcc.dg/debug/pr80321.c: New test.
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR debug/79255
* dwarf2out.c (decls_for_scope): If BLOCK_NONLOCALIZED_VAR is
a FUNCTION_DECL, pass it as decl instead of origin to
process_scope_var.
* gcc.dg/pr79255.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/debug/pr80321.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr79255.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/dwarf2out.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/79572] [6 Regression] reference binding to null pointer not reported with -fsanitize=undefined
Date: Fri, 05 May 2017 21:51:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:49:20 2017
New Revision: 247694
URL: https://gcc.gnu.org/viewcvs?rev=247694&root=gcc&view=rev
Log:
Backported from mainline
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR c++/79572
* c-ubsan.h (ubsan_maybe_instrument_reference): Change argument to
tree *.
* c-ubsan.c (ubsan_maybe_instrument_reference): Likewise. Handle
not just NOP_EXPR to REFERENCE_TYPE, but also INTEGER_CST with
REFERENCE_TYPE.
* cp-gimplify.c (cp_genericize_r): Sanitize INTEGER_CSTs with
REFERENCE_TYPE. Adjust ubsan_maybe_instrument_reference caller
for NOP_EXPR to REFERENCE_TYPE.
* g++.dg/ubsan/null-8.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/null-8.C
Modified:
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-ubsan.c
branches/gcc-6-branch/gcc/c-family/c-ubsan.h
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/cp-gimplify.c
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Subject: [Bug bootstrap/79255] [6 Regression] PGO bootstrap fails on x86_64/ppc64le building Ada
Date: Fri, 05 May 2017 21:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79255
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:50:27 2017
New Revision: 247695
URL: https://gcc.gnu.org/viewcvs?rev=247695&root=gcc&view=rev
Log:
Backported from mainline
2017-04-13 Jakub Jelinek <jakub@redhat.com>
PR debug/80321
* dwarf2out.c (decls_for_scope): Ignore declarations of
current_function_decl in BLOCK_NONLOCALIZED_VARS.
* gcc.dg/debug/pr80321.c: New test.
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR debug/79255
* dwarf2out.c (decls_for_scope): If BLOCK_NONLOCALIZED_VAR is
a FUNCTION_DECL, pass it as decl instead of origin to
process_scope_var.
* gcc.dg/pr79255.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/debug/pr80321.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr79255.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/dwarf2out.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/80286] [5/6 Regression] AVX2 _mm_cvtsi128_si32 doesn't return a proper 32bits int
Date: Fri, 05 May 2017 21:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80286
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:51:14 2017
New Revision: 247696
URL: https://gcc.gnu.org/viewcvs?rev=247696&root=gcc&view=rev
Log:
Backported from mainline
2017-04-04 Jakub Jelinek <jakub@redhat.com>
PR target/80286
* config/i386/i386.c (ix86_expand_args_builtin): If op has scalar
int mode, convert_modes it to mode as unsigned, otherwise use
lowpart_subreg to mode rather than SImode.
* config/i386/sse.md (<mask_codefor>ashr<mode>3<mask_name>,
ashr<mode>3, ashr<mode>3<mask_name>, <shift_insn><mode>3<mask_name>):
Use DImode instead of SImode for the shift count operand.
* config/i386/mmx.md (mmx_ashr<mode>3, mmx_<shift_insn><mode>3):
Likewise.
* gcc.target/i386/avx-pr80286.c: New test.
* gcc.dg/pr80286.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80286.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/avx-pr80286.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/i386/mmx.md
branches/gcc-6-branch/gcc/config/i386/sse.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80176] [5/6 Regression] cannot bind reference to static member function using object access expression
Date: Fri, 05 May 2017 21:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80176
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:52:40 2017
New Revision: 247698
URL: https://gcc.gnu.org/viewcvs?rev=247698&root=gcc&view=rev
Log:
Backported from mainline
2017-04-10 Jakub Jelinek <jakub@redhat.com>
PR c++/80176
* tree.c (lvalue_kind): For COMPONENT_REF with BASELINK second
operand, if it is a static member function, recurse on the
BASELINK.
* g++.dg/init/ref23.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/init/ref23.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/tree.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80297] [6 Regression] Compiler time crash: type mismatch in binary expression
Date: Fri, 05 May 2017 21:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80297
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:52:00 2017
New Revision: 247697
URL: https://gcc.gnu.org/viewcvs?rev=247697&root=gcc&view=rev
Log:
Backported from mainline
2017-04-04 Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR c++/80297
* genmatch.c (capture::gen_transform): For GENERIC unshare_expr
captures used multiple times, except for the last use.
* generic-match-head.c: Include gimplify.h.
* g++.dg/torture/pr80297.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80297.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/generic-match-head.c
branches/gcc-6-branch/gcc/genmatch.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80363] #'vec_cond_expr' not supported by dump_expr#<expression error>
Date: Fri, 05 May 2017 21:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80363
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:53:18 2017
New Revision: 247699
URL: https://gcc.gnu.org/viewcvs?rev=247699&root=gcc&view=rev
Log:
Backported from mainline
2017-04-11 Jakub Jelinek <jakub@redhat.com>
PR c++/80363
* error.c (dump_expr): Handle VEC_COND_EXPR like COND_EXPR.
* g++.dg/ext/pr80363.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/ext/pr80363.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/error.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug libgomp/80394] Empty OpenMP task is wrongly removed when optimizing
Date: Fri, 05 May 2017 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80394
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:54:06 2017
New Revision: 247700
URL: https://gcc.gnu.org/viewcvs?rev=247700&root=gcc&view=rev
Log:
Backported from mainline
2017-04-11 Jakub Jelinek <jakub@redhat.com>
PR libgomp/80394
* omp-low.c (scan_omp_task): Don't optimize away empty tasks
if they have any depend clauses.
* testsuite/libgomp.c/pr80394.c: New test.
Added:
branches/gcc-6-branch/libgomp/testsuite/libgomp.c/pr80394.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/omp-low.c
branches/gcc-6-branch/libgomp/ChangeLog
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Subject: [Bug sanitizer/80349] [6 Regression] UBSAN: compile time crash with "type mismatch in binary expression" message
Date: Fri, 05 May 2017 21:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80349
--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:55:29 2017
New Revision: 247702
URL: https://gcc.gnu.org/viewcvs?rev=247702&root=gcc&view=rev
Log:
Backported from mainline
2017-04-12 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/80349
* fold-const.c (fold_binary_loc) <case BIT_IOR_EXPR>: Convert arg0's
first argument to type.
* g++.dg/ubsan/pr80349.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/pr80349.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/80385] [5/6 Regression] Segfault in commutative_operand_precedence() rtlanal.c:3373
Date: Fri, 05 May 2017 21:56:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:54:52 2017
New Revision: 247701
URL: https://gcc.gnu.org/viewcvs?rev=247701&root=gcc&view=rev
Log:
Backported from mainline
2017-04-11 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/80385
* simplify-rtx.c (simplify_unary_operation_1): Don't transform
(not (neg X)) into (plus X -1) for complex or non-integral modes.
* g++.dg/opt/pr80385.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80385.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/simplify-rtx.c
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>From gcc-bugs-return-562735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 21:56:45 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 rtl-optimization/80501] [6 Regression] Wrong code w/ a signed char, a shift, and a conversion to int
Date: Fri, 05 May 2017 22:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80501
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 5 21:56:08 2017
New Revision: 247703
URL: https://gcc.gnu.org/viewcvs?rev=247703&root=gcc&view=rev
Log:
Backported from mainline
2017-04-25 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/80501
* combine.c (make_compound_operation_int): Set subreg_code to SET
even for AND with mask of the sign bit of mode.
* gcc.c-torture/execute/pr80501.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.c-torture/execute/pr80501.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-562736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 22:09:34 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/80646] New: [Regression] wrong type info for extern inline function when compiling Emacs
Date: Fri, 05 May 2017 22:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80646
Bug ID: 80646
Summary: [Regression] wrong type info for extern inline
function when compiling Emacs
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
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Reporter: eggert at gnu dot org
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Created attachment 41327
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41327&action=edit
gzipped tarball of three source files illustrating the bug
GCC 6.3.1 x86-64 20161221 (Red Hat 6.3.1-1) outputs incorrect debug information
for inline functions in some cases, and this can make programs hard to debug.
The problem does not occur for GCC 4.8.5 20150623 (Red Hat 4.8.5-11), so this
appears to be a regression.
I ran into the problem while attempting to debug GNU Emacs, and constructed a
small test case to illustrate it. To reproduce it on Fedora 25 x86-64 with
6.3.1 20161221, extract the files lisp.h, t.c and u.c from the attached
tarball, and compile them by running the shell command:
gcc -g3 -O2 t.c u.c
Then use GDB as follows:
$ gdb a.out
...
(gdb) ptype make_number
type = int ()
(gdb) ptype make_natnum
type = struct {
long i;
} (long)
(gdb) ptype XIL
type = struct {
long i;
} (long)
(gdb)
The reported type of 'make_number' is incorrect: it should be the same type as
that of make_natnum and XIL, but instead is a function returning 'int'. This
incorrect type can cause GDB to print incorrect results in expressions
involving make_number. Looking at the assembly-language output, it appears that
GCC is generating the wrong debug information for this example.
>From gcc-bugs-return-562737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 05 22:42:59 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/53896] nonreturning function suggested as 'pure' candidate
Date: Fri, 05 May 2017 23:16:00 -0000
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--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Martin Liška from comment #2)
> it's still up to user to mark the function as pure.
Thanks for looking into it. We have worked around the problem in GNU Emacs by
avoiding the -Wsuggest-attribute=pure option. It might be helpful to document
this limitation of -Wsuggest-attribute=pure, and perhaps the option should even
be deprecated due to its limited utility.
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80636] AVX / AVX512 register-zeroing should always use AVX 128b, not ymm or zmm
Date: Sat, 06 May 2017 02:48:00 -0000
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--- Comment #2 from Peter Cordes <peter at cordes dot ca> ---
> The same possibly applies to all "zero-extending" moves?
Yes, if a vmovdqa %xmm0,%xmm1 will work, it's the best choice on AMD CPUs,
and doesn't hurt on Intel CPUs. So in any case where you need to copy a
register, and the upper lane(s) are known to be zero.
If you're copying just to zero the upper lane, you don't have a choice (if you
don't know that the source reg's upper lane is zeroed).
In general, when all else is equal, use narrower vectors. (e.g. in a
horizontal sum, the first step should be vextractf128 to reduce down to 128b
vectors.)
---
Quoting the Bulldozer section of Agner Fog's microarch.pdf (section 18.10
Bulldozer AVX):
> 128-bit register-to-register moves have zero latency, while 256-bit register-to-register
> moves have a latency of 2 clocks plus a penalty of 2-3 clocks for using a different
> domain (see below) on Bulldozer and Piledriver.
---
On Ryzen: the low 128-bit lane is renamed with zero latency, but the upper lane
needs an execution unit.
Despite this, vectorizing with 256b *is* worth it on Ryzen, because the core is
so wide and decodes double-uop instructions efficiently. Also, AVX 3-operand
instructions make moves rarer.
---
On Jaguar: 128b moves (with implicit zeroing of the upper lane) are 1 uop, 256b
moves are 2 uops. 128b moves from zeroed registers are eliminated (no
execution port, but still have to decode/issue/retire).
David Kanter's writeup (http://www.realworldtech.com/jaguar/4/) explains that
the PRF has an "is-zero" bit which can be set efficiently. This is how 128b
moves are able to zero the upper lane of the destination in the rename stage,
without using an extra uop. (And to avoid needing an execution port for
xor-zeroing uops).
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Subject: [Bug tree-optimization/80647] New: vectorized loop crashes from wrongly assuming 16 byte alignment
Date: Sat, 06 May 2017 02:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80647
Bug ID: 80647
Summary: vectorized loop crashes from wrongly assuming 16 byte
alignment
Product: gcc
Version: 6.1.0
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Created attachment 41328
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41328&action=edit
compiling with -O3 will reproduce the crash
I'm getting a crash for a function that extracts a sub region of an image
in-place. I compile with gcc -O3, which vectorizes the inner most loop,
while (twd--)
{
*pintdest++ = *pintsrc++;
}
---------------assembly-------------------------
movdqa (%r10,%rax,1),%xmm0
add $0x1,%ecx
movups %xmm0,(%rdx,%rax,1)
------------------------------------------------
It crashes on movdqa because the address isn't aligned. It should be using
unaligned vector loads like movdqu or lddqu instead.
I tested it with GCC 4.8 which did vectorize the loop correctly.
Starting with Nehalem, there is no penalty for using unaligned loads/stores if
the vector doesn't span 2 cache lines, so why not always generate unaligned
loads/stores?
It used to be that the other advantage to exploit for aligned data was to fuse
the vector load/store with another instruction, reducing machine code size. But
even that alignment restriction for memory operands was relaxed starting with
SandyBridge's VEX instructions.
>From gcc-bugs-return-562740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 02:58:07 2017
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From: "Keith.S.Thompson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80648] New: Valid C++11 null pointer constant (1-1) is rejected
Date: Sat, 06 May 2017 03:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80648
Bug ID: 80648
Summary: Valid C++11 null pointer constant (1-1) is rejected
Product: gcc
Version: 7.1.0
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I'm using g++ 7.1.0, built from source, on Ubuntu 16.10 x86_64.
$ g++ --version
g++ (GCC) 7.1.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ uname -a
Linux bomb20 4.8.0-46-generic #49-Ubuntu SMP Fri Mar 31 13:57:14 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
$
Test case:
int main() {
void *p = 1-1;
}
When compiled with "g++ -std=c++03 -pedantic c.cpp", the compiler correctly
doesn't complain; likewise with -std=c++98.
With "g++ -std=c++11 -pedantic", it produces an error message:
c.cpp: In function ‘int main()’:
c.cpp:2:16: error: invalid conversion from ‘int’ to ‘void*’ [-fpermissive]
void *p = 1-1;
~^~
And the same message with "g++ -std=c++14 -pedantic".
C++14 restricted the definition of a null pointer constant. In the
N4296 draft, 4.10p1 [conv.ptr] says:
"A null pointer constant is an integer literal (2.13.2) with value
zero or a prvalue of type std::nullptr_t."
1-1 is not an integer literal, so the error message is correct for C++14.
But C++11 had not yet made that change. The C++11 standard,
ISO/IEC 14882:2011(E), in the corresponding section, says:
"A null pointer constant is an integral constant expression (5.19)
prvalue of integer type that evaluates to zero or a prvalue of type
std::nullptr_t."
g++ correctly accepts 1-1 as a null pointer constant in C++98
and C++03 modes, and correctly rejects it in C++14 mode, but it
should accept it in C++11 mode.
(I do not of course suggest that using 1-1 as a null pointer constant
is a good idea.)
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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/80647] vectorized loop crashes from wrongly assuming 16 byte alignment
Date: Sat, 06 May 2017 03:49:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
pintsrc = (int*)src;
pintdest = (int*)dst;
src and dst are not 4 byte aligned here? This is a bug in your code due to
that. -fsantizer=undefined will catch these at runtime IIRC.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sat, 06 May 2017 06:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80648
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
Summary|Valid C++11 null pointer |[DR903] Valid C++11 null
|constant (1-1) is rejected |pointer constant (1-1) is
| |rejected
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
http://open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#903
Defect report in this case applies explicitly to C++11.
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From: "akim.demaille at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80650] New: #pragma do not control -Wcpp
Date: Sat, 06 May 2017 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80650
Bug ID: 80650
Summary: #pragma do not control -Wcpp
Product: gcc
Version: 7.0.1
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Hi!
When compiling C, -Wcpp can be controlled by the diagnostics pragmas, but not
in C++ mode.
$ cat bar.c
#pragma GCC diagnostic ignored "-Wcpp"
#warning Foo
int i;
$ gcc-mp-7 -c bar.c
$ cp bar.c bar.cc
$ g++-mp-7 -c bar.c
bar.c:2:2: warning: #warning Foo [-Wcpp]
#warning Foo
^~~~~~~
$ g++-mp-7 --version
g++-mp-7 (MacPorts gcc7 7-20170420_0) 7.0.1 20170420 (prerelease)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I have observed this with 4.9, 5.5, 6.2 and 7.0.
Cheers!
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:16:17 2017
New Revision: 247712
URL: https://gcc.gnu.org/viewcvs?rev=247712&root=gcc&view=rev
Log:
Replace absolute line numbers in g++.dg/{debug,goacc}
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* g++.dg/debug/dwarf2/dwarf2-1.C: Replace absolute line numbers.
* g++.dg/debug/dwarf2/dwarf2-2.C: Same.
* g++.dg/debug/dwarf2/pr46123-2.C: Same.
* g++.dg/debug/dwarf2/typedef5.C: Same.
* g++.dg/goacc/data-1.C: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/debug/dwarf2/dwarf2-1.C
trunk/gcc/testsuite/g++.dg/debug/dwarf2/dwarf2-2.C
trunk/gcc/testsuite/g++.dg/debug/dwarf2/pr46123-2.C
trunk/gcc/testsuite/g++.dg/debug/dwarf2/typedef5.C
trunk/gcc/testsuite/g++.dg/goacc/data-1.C
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--- Comment #11 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:16:53 2017
New Revision: 247715
URL: https://gcc.gnu.org/viewcvs?rev=247715&root=gcc&view=rev
Log:
Replace absolute line numbers in gcc.target/spu
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* gcc.target/spu/Wmain.c: Replace absolute line numbers.
* gcc.target/spu/intrinsics-1.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/spu/Wmain.c
trunk/gcc/testsuite/gcc.target/spu/intrinsics-1.c
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--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:16:33 2017
New Revision: 247713
URL: https://gcc.gnu.org/viewcvs?rev=247713&root=gcc&view=rev
Log:
Replace absolute line numbers in gcc.target/aarch64
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* gcc.target/aarch64/spellcheck_1.c: Replace absolute line numbers.
* gcc.target/aarch64/spellcheck_2.c: Same.
* gcc.target/aarch64/spellcheck_3.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_1.c
trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_2.c
trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_3.c
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
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--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:16:43 2017
New Revision: 247714
URL: https://gcc.gnu.org/viewcvs?rev=247714&root=gcc&view=rev
Log:
Replace absolute line numbers in gcc.target/arm
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* gcc.target/arm/pr69180.c: Replace absolute line numbers.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/arm/pr69180.c
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Subject: [Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers
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--- Comment #12 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:17:05 2017
New Revision: 247716
URL: https://gcc.gnu.org/viewcvs?rev=247716&root=gcc&view=rev
Log:
Replace absolute line numbers in gcc.target/powerpc
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80557
* gcc.target/powerpc/altivec-macros.c: Replace absolute line numbers.
* gcc.target/powerpc/altivec-types-1.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/altivec-macros.c
trunk/gcc/testsuite/gcc.target/powerpc/altivec-types-1.c
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From: "webrown.cpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80649] New: value-initialization rather than default-initialization at some optimization levels
Date: Sat, 06 May 2017 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80649
Bug ID: 80649
Summary: value-initialization rather than
default-initialization at some optimization levels
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: john.duncan at oracle dot com
CC: webrown.cpp at gmail dot com
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CC: webrown.cpp at gmail dot com
This problem concerns a placement-new statement within a loop:
new (ptr.p) TestRecord;
In this case "new TestRecord" without any parentheses or braces should perform
default-initialization. My experience with gcc 6.3 shows default-initialization
at some -O levels, but apparent value-initialization at other levels. In the
example submitted here in the bug report, the problem appears at -O1 but not at
-O2. In the actual large codebase where I first observed the problem, it was
seen at -O2 but not at -O1.
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Subject: [Bug testsuite/80606] avx-vtestpd-1.c contains outdated line number
Date: Sat, 06 May 2017 07:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80606
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat May 6 07:31:27 2017
New Revision: 247718
URL: https://gcc.gnu.org/viewcvs?rev=247718&root=gcc&view=rev
Log:
Remove default_packed lines from i386/avx-vtestp{d,s}*
2017-05-06 Tom de Vries <tom@codesourcery.com>
PR testsuite/80606
* gcc.target/i386/avx-vtestpd-1.c: Remove default_packed lines.
* gcc.target/i386/avx-vtestpd-2.c: Same.
* gcc.target/i386/avx-vtestpd-256-1.c: Same.
* gcc.target/i386/avx-vtestpd-256-2.c: Same.
* gcc.target/i386/avx-vtestpd-256-3.c: Same.
* gcc.target/i386/avx-vtestpd-3.c: Same.
* gcc.target/i386/avx-vtestps-1.c: Same.
* gcc.target/i386/avx-vtestps-2.c: Same.
* gcc.target/i386/avx-vtestps-256-1.c: Same.
* gcc.target/i386/avx-vtestps-256-2.c: Same.
* gcc.target/i386/avx-vtestps-256-3.c: Same.
* gcc.target/i386/avx-vtestps-3.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-1.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-2.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-256-1.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-256-2.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-256-3.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestpd-3.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-1.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-2.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-256-1.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-256-2.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-256-3.c
trunk/gcc/testsuite/gcc.target/i386/avx-vtestps-3.c
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Subject: [Bug testsuite/80606] avx-vtestpd-1.c contains outdated line number
Date: Sat, 06 May 2017 07:44:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch committed, marking resolved-fixed.
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Subject: [Bug rtl-optimization/75964] insn combiner removes comparison after ABS
Date: Sat, 06 May 2017 07:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=75964
--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Sat May 6 07:44:13 2017
New Revision: 247719
URL: https://gcc.gnu.org/viewcvs?rev=247719&root=gcc&view=rev
Log:
PR 75964: Invalid integer ABS handling in simplify-rtx.c
RTL has no distinction between signed and unsigned values, so it
doesn't make sense to test for signed overflow.
2017-05-06 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR rtl-optimization/75964
* simplify-rtx.c (simplify_const_relational_operation): Remove
invalid handling of comparisons of integer ABS.
gcc/testsuite/
PR rtl-optimization/75964
* gcc.dg/torture/pr75964.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr75964.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/simplify-rtx.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/75964] insn combiner removes comparison after ABS
Date: Sat, 06 May 2017 10:38:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed on trunk. It doesn't look like it's a regression, but maybe we want to
backport anyway?
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Subject: [Bug target/80527] SSE4 Compiling issue
Date: Sat, 06 May 2017 11:59:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|--- |4.9.0
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Milo from comment #3)
> We are using Ubuntu 12.04. It used gcc 4.8.5 and also has the same issue.
> Furthermore, some tools from an EDA company are using gcc 4.8.3 as the only
> compiler.
>
> We believed that would help if it could be fixed.
You will have to contact whoever provides your gcc (either Ubuntu or the EDA
company) and see if they are willing to backport the relevant patches for you.
> By the way, you mentioned about 4.9 version. Is that means 4.9 is still be
> maintaining?
No, the maintained release branches are listed on
https://gcc.gnu.org/
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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/80477] [OOP] Polymorphic function result generates memory leak
Date: Sat, 06 May 2017 12:29:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=65347
--- Comment #19 from janus at gcc dot gnu.org ---
I think this PR is very much related to PR 65347 ("Final subroutine not called
for function result") ...
Deallocation and finalization of function results are very similar. Both
require a temporary to be generated. And IIRC we even use the finalization
wrapper for deallocating polymorphic variables in other cases (even if they
have no actual FINAL procedures). Such an approach would fix both PRs in one
go.
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Sat, 06 May 2017 12:33:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
--- Comment #10 from Rainer Orth <ro at gcc dot gnu.org> ---
Interestingly, a i386-apple-darwin16 bootstrap *does* work fine.
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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/80477] [OOP] Polymorphic function result generates memory leak
Date: Sat, 06 May 2017 13:15:00 -0000
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--- Comment #20 from janus at gcc dot gnu.org ---
(In reply to janus from comment #19)
> And IIRC we even use the finalization
> wrapper for deallocating polymorphic variables in other cases (even if they
> have no actual FINAL procedures).
In fact the finalization wrapper itself does not take care of deallocating the
variable (since finalization also applies to non-allocatable variables), but it
does deallocate any allocatable components (if existent).
Plus: For any polymorphic variable, we need to check at *runtime* whether
finalization is necessary, since an extended type may have finalizers, even if
the base class does not.
The typical code that is generated for the deallocation of a polymorphic
variable 'c' looks like this:
if (c._data != 0B)
{
if (c._vptr->_final != 0B)
{
{
struct array0_t desc.0;
desc.0.dtype = 40;
desc.0.data = (void * restrict) c._data;
c._vptr->_final (&desc.0, c._vptr->_size, 0);
}
}
__builtin_free ((void *) c._data);
}
>From gcc-bugs-return-562758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 13:15:51 2017
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Subject: [Bug c++/80649] value-initialization rather than default-initialization at some optimization levels
Date: Sat, 06 May 2017 13:28:00 -0000
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--- Comment #1 from J.D. Duncan <john.duncan at oracle dot com> ---
Created attachment 41330
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41330&action=edit
g++ -v output
>From gcc-bugs-return-562759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 13:28:41 2017
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From: "paboyle at ph dot ed.ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80652] New: Union conversion between __m128d and double array does not work under 5.0 through 6.2
Date: Sat, 06 May 2017 13:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80652
Bug ID: 80652
Summary: Union conversion between __m128d and double array does
not work under 5.0 through 6.2
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: paboyle at ph dot ed.ac.uk
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Union conversion between __m128d and double array does not work under
-O3 for g++ versions 5.0 to 6.2. Compiled with -std=c++11 -O3 .
https://wandbox.org/permlink/tzssJza6R9XnqANw
Code:
#include <iostream>
#include <complex>
#include <pmmintrin.h>
template <class Scalar_type, class Vector_type>
class simd {
public:
typedef Vector_type vector_type;
typedef Scalar_type scalar_type;
typedef union conv_t_union {
Vector_type v;
Scalar_type s[sizeof(Vector_type) / sizeof(Scalar_type)];
conv_t_union(){};
} conv_t;
static inline constexpr int Nsimd(void) {
return sizeof(Vector_type) / sizeof(Scalar_type);
}
Vector_type v;
template <class functor>
friend inline simd SimdApply(const functor &func, const simd &v) {
simd ret;
simd::conv_t conv;
conv.v = v.v;
for (int i = 0; i < simd::Nsimd(); i++) {
conv.s[i] = func(conv.s[i]);
}
ret.v = conv.v;
return ret;
}
};
template <class scalar>
struct RealFunctor {
scalar operator()(const scalar &a) const {
return std::real(a);
}
};
template <class S, class V>
inline simd<S, V> real(const simd<S, V> &r) {
return SimdApply(RealFunctor<S>(), r);
}
typedef simd<std::complex<double>, __m128d> vcomplexd;
int main(int argc, char **argv)
{
vcomplexd a,b;
a.v=_mm_set_pd(2.0,1.0);
b = real(a);
vcomplexd::conv_t conv;
conv.v = b.v;
for(int i=0;i<vcomplexd::Nsimd();i++){
std::cout << conv.s[i]<<" ";
}
std::cout << std::endl;
}
>From gcc-bugs-return-562760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 13:54:28 2017
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Subject: [Bug c/80653] New: Enhancement: better location info for -Wunsafe-loop-optimizations
Date: Sat, 06 May 2017 14:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80653
Bug ID: 80653
Summary: Enhancement: better location info for
-Wunsafe-loop-optimizations
Product: gcc
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Currently, with a for-loop, -Wunsafe-loop-optimizations points to the "for":
reloc.c: In function 'bfd_generic_get_relocated_section_contents':
reloc.c:6000:7: warning: missed loop optimization, the loop counter may
overflow [-Wunsafe-loop-optimizations]
for (parent = reloc_vector; (parent != NULL) && (*parent != NULL);
^~~
and with a while-loop, it points to the opening parenthesis:
pef.c: In function 'bfd_pef_parse_symbols':
pef.c:893:13: warning: missed loop optimization, the loop counter may overflow
[-Wunsafe-loop-optimizations]
while (((codepos + 4UL) <= codelen) && (codepos < (size_t)UINT_MAX))
^
pef.c:723:13: warning: missed loop optimization, the loop counter may overflow
[-Wunsafe-loop-optimizations]
while (((pos + 4UL) <= len) && (pos < (size_t)UINT_MAX))
^
It'd be more useful if the caret instead pointed to the variable being used as
the loop counter, and/or the point in the loop where it actually overflows
>From gcc-bugs-return-562761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 14:32:08 2017
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Subject: [Bug target/79709] Subobtimal code with -mavx and explicit vector
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--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
Created attachment 41331
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41331&action=edit
recognize a VEC_CONCAT from a constructor (not clean)
One piece of the issue is v4di = { v2di, v2di } where we currently generate
vmovdqa %xmm3, -48(%rsp)
vmovdqa %xmm5, -32(%rsp)
vmovdqa -48(%rsp), %ymm0
and the attached patch generates
vinsertf128 $0x1, %xmm1, %ymm0, %ymm0
I am not very familiar with expansion and RTL, the patch probably has many
issues. I don't know if there is something significantly more general to try. I
was tempted to cast (aka subreg) V2DI to TI, construct a V2TI, and cast back to
V4DI, since the code nearby is supposed to handle constructors with only scalar
elements, but an experiment with __int128 seems to indicate that we don't
discover vec_concat for scalars either :-(
>From gcc-bugs-return-562762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 15:04:23 2017
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Subject: [Bug tree-optimization/78496] [7/8 Regression] Missed opportunities for jump threading
Date: Sat, 06 May 2017 16:32:00 -0000
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--- Comment #9 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Sat May 6 15:03:40 2017
New Revision: 247721
URL: https://gcc.gnu.org/viewcvs?rev=247721&root=gcc&view=rev
Log:
PR tree-optimization/78496
* tree-vrp.c (simplify_assert_expr_using_ranges): New function.
(simplify_stmt_using_ranges): Call it.
(vrp_dom_walker::before_dom_children): Extract equivalences
from an ASSERT_EXPR with an equality comparison against a
constant.
PR tree-optimization/78496
* gcc.dg/tree-ssa/ssa-thread-16.c: New test.
* gcc.dg/tree-ssa/ssa-thread-17.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-16.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-17.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80652] Union conversion between __m128d and double array does not work under 5.0 through 6.2
Date: Sat, 06 May 2017 16:39:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I didn't study the testcase (a bit long), but I am getting the same output with
any version of gcc or clang I tried, at any level of optimization. Are you
certain about your example? What is the expected output? And since you
specifically mention -O3, what difference did it make for you?
>From gcc-bugs-return-562764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 16:39:24 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80652] Union conversion between __m128d and double array does not work under 5.0 through 6.2
Date: Sat, 06 May 2017 16:41:00 -0000
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--- Comment #2 from Peter Boyle <paboyle at ph dot ed.ac.uk> ---
Thanks for the quick response. Hope this more complete info is helpful.
Should give (1,0) but does give (0,0) under G++ 5.0-6.2 under -O3.
peterboyle$ g++-mp-5 --version
g++-mp-5 (MacPorts gcc5 5.4.0_0) 5.4.0
Under -O3: I THINK THIS IS WRONG AND A COMPILER ERROR
c010200:~ peterboyle$ g++-mp-5 Gcc-test.cc -std=c++11 -O3
c010200:~ peterboyle$ ./a.out
(0,0)
c010200:~ peterboyle$ g++-mp-5 Gcc-test.cc -std=c++11
c010200:~ peterboyle$ ./a.out
(1,0)
Under g++4.9
c010200:~ peterboyle$ g++-4.9 Gcc-test.cc -std=c++11 -O3
c010200:~ peterboyle$ ./a.out
(1,0)
Under llvm xcode
c010200:~ peterboyle$ g++ Gcc-test.cc -std=c++11 -O3
c010200:~ peterboyle$ ./a.out
(1,0)
I also used wandbox to to test many versions, and filed an issue
on my own codebase where I first hit it (prior to small example reduction).
Here is my issue report: https://github.com/paboyle/Grid/issues/100
https://wandbox.org/permlink/tzssJza6R9XnqANw
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80652
Getting Travis fails under gcc-5 for Test_simd, now that I added more
comprehensive testing to the
CI test suite. The limitations of Travis runtime limits & weak cores are being
shown.
Travis uses 5.4.1 for g++-5.
We are going to move to a new CI server we bought for the purpose soon.
Working (-) Broken (X):
4.9.0 -
4.9.1 -
5.1.0 X
5.2.0 X
5.3.0 X
5.4.0 X
6.1.0 X
6.2.0 X
6.3.0 -
7.1.0 -
8.0.0 (HEAD) -
Clang 3.5 through 5.0 are good on this test.
Options:
a) Drop to -O2 under broken G++ versions
b) Refuse to build with broken G++ versions.
Opinions sought.
Attempting to work around with
#if (GNUC == 5 ) || ( ( GNUC == 6 ) && GNUC_MINOR < 3 )
#pragma GCC push_options
#pragma GCC optimize ("O0")
#endif
and same to pop options around the SimdApply in Grid_vector_types.
But, I now have very, very, VERY poor confidence in these compiler versions.
e.g. Where else do we hit this? It is dangerous to not apply this globally
(which we could force) but that will cripple performance.
Do we unsupport a whole swathe of G++ versions?
I posted on stack overflow to try to get a double check on the legality of the
union use.
http://stackoverflow.com/questions/2906365/gcc-strict-aliasing-and-casting-through-a-union/43820916#43820916
But, I think this is legal code.
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Subject: [Bug c++/80652] Union conversion between __m128d and double array does not work under 5.0 through 6.2
Date: Sat, 06 May 2017 17:35:00 -0000
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--- Comment #3 from Peter Boyle <paboyle at ph dot ed.ac.uk> ---
Can confirm (5.4) that -O2 also fails,
-O1 passes.
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Subject: [Bug sanitizer/70878] [5/6 Regression] ICE in expand_expr_addr_expr_1, at expr.c:7680
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Vittorio Zecca <zeccav at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
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Vittorio Zecca <zeccav at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
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Subject: [Bug c++/16994] [meta-bug] VLA and C++
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Bug 16994 depends on bug 71158, which changed state.
Bug 71158 Summary: ICE in tree_to_uhwi with -fsanitize=address
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71158
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Subject: [Bug c++/50184] Segmentation fault. Copy Constructor.
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--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
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From: "bugs at mm dot beanwood.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80654] New: is_trivially_copy_constructible fails with compiler error with vector of uncopyable objects
Date: Sat, 06 May 2017 17:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80654
Bug ID: 80654
Summary: is_trivially_copy_constructible fails with compiler
error with vector of uncopyable objects
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 41332
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41332&action=edit
Pre-processed file that triggers bug
std::is_trivially_copy_constructible<std::vector<nocopy>>::value, where nocopy
is a non-copyable type (e.g. std::unique_ptr), causes a compiler error instead
of producing a value of false as expected.
A practical consequence of this bug is that it is not possible to
move-construct a std::optional<std::vector<nocopy>>, because std::optional uses
std::is_trivially_copy_constructible internally.
Preprocessed file is attached.
Compiler output:
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-7/current.x86_64/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/gcc-7/7.1.0.x86_64/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /usr/local/gcc-7/tmp-build/gcc-7.1.0/configure
--prefix=/usr/local/gcc-7/7.1.0.x86_64 --enable-languages=c,c++,go
--with-arch-32=i586
Thread model: posix
gcc version 7.1.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/local/gcc-7/7.1.0.x86_64/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/cc1plus -E
-quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE bug.cpp -mtune=generic
-march=x86-64 -fpch-preprocess -o bug.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0
/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0/x86_64-pc-linux-gnu
/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0/backward
/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/include
/usr/local/include
/usr/local/gcc-7/7.1.0.x86_64/include
/usr/local/gcc-7/7.1.0.x86_64/lib/gcc/x86_64-pc-linux-gnu/7.1.0/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/local/gcc-7/7.1.0.x86_64/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/cc1plus
-fpreprocessed bug.ii -quiet -dumpbase bug.cpp -mtune=generic -march=x86-64
-auxbase bug -version -o bug.s
GNU C++14 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.0.0, MPFR version
3.1.2-p3, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.0.0, MPFR version
3.1.2-p3, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: b73243a43f922df6e56feb5c73c5449a
In file included from
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/vector:62:0,
from bug.cpp:3:
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_construct.h: In
instantiation of 'void std::_Construct(_T1*, _Args&& ...) [with _T1 = nocopy;
_Args = {const nocopy&}]':
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_uninitialized.h:83:18:
required from 'static _ForwardIterator
std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator,
_InputIterator, _ForwardIterator) [with _InputIterator =
__gnu_cxx::__normal_iterator<const nocopy*, std::vector<nocopy> >;
_ForwardIterator = nocopy*; bool _TrivialValueTypes = false]'
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_uninitialized.h:134:15:
required from '_ForwardIterator std::uninitialized_copy(_InputIterator,
_InputIterator, _ForwardIterator) [with _InputIterator =
__gnu_cxx::__normal_iterator<const nocopy*, std::vector<nocopy> >;
_ForwardIterator = nocopy*]'
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_uninitialized.h:289:37:
required from '_ForwardIterator std::__uninitialized_copy_a(_InputIterator,
_InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator =
__gnu_cxx::__normal_iterator<const nocopy*, std::vector<nocopy> >;
_ForwardIterator = nocopy*; _Tp = nocopy]'
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_vector.h:331:31:
required from 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp,
_Alloc>&) [with _Tp = nocopy; _Alloc = std::allocator<nocopy>]'
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/type_traits:1409:12: required
from 'struct std::is_trivially_copy_constructible<std::vector<nocopy> >'
bug.cpp:11:72: required from here
/usr/local/gcc-7/7.1.0.x86_64/include/c++/7.1.0/bits/stl_construct.h:75:7:
error: use of deleted function 'nocopy::nocopy(const nocopy&)'
{ ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bug.cpp:6:2: note: declared here
nocopy (const nocopy&) = delete;
^~~~~~
bug.cpp:
#include <iostream>
#include <type_traits>
#include <vector>
struct nocopy {
nocopy (const nocopy&) = delete;
};
int main ()
{
std::cout <<
std::is_trivially_copy_constructible<std::vector<nocopy>>::value;
return 0;
}
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Subject: [Bug c++/80655] New: -Werror=format-truncation inconsistency between x86_32 and x86_64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80655
Bug ID: 80655
Summary: -Werror=format-truncation inconsistency between x86_32
and x86_64
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: krejzi at email dot com
Target Milestone: ---
When building SPIRV-Tools with gcc-7.1.0 (stock, self-built), it builds fine
for 64 bit, but not for 32 bit (multilib setup).
The part of the code in question can be seen at [1]. I am getting the following
error when building SPIRV-Tools with "gcc -m32" and "g++ -m32"
In file included from
/home/armin/src/pacman/pkgbuild/vulkan-loader/src/Vulkan-LoaderAndValidationLayers32-sdk-1.0.46.0/external/spirv-tools/source/opt/ir_loader.cpp:17:0:
/home/armin/src/pacman/pkgbuild/vulkan-loader/src/Vulkan-LoaderAndValidationLayers32-sdk-1.0.46.0/external/spirv-tools/source/opt/log.h:
In function ‘void spvtools::Logf(const MessageConsumer&, spv_message_level_t,
const char*, const spv_position_t&, const char*, Args&& ...) [with Args =
{const SpvOp_&}]’:
/home/armin/src/pacman/pkgbuild/vulkan-loader/src/Vulkan-LoaderAndValidationLayers32-sdk-1.0.46.0/external/spirv-tools/source/opt/log.h:113:13:
error: null destination pointer [-Werror=format-truncation=]
snprintf(longer_message.data(), longer_message.size(), format,
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
std::forward<Args>(args)...);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The very same package built fine with gcc-6.3.0.
[1]
https://github.com/KhronosGroup/SPIRV-Tools/blob/87a3f651e2416c830cb1eab410b3616068395985/source/opt/log.h#L111
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Subject: [Bug c++/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Sat, 06 May 2017 18:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80655
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-06
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Can you attach the preprocessed source?
What the warning is saying is longer_message.data() in one path to the snprintf
will be null. Without the preprocessed source there is no way to figure that
out.
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Subject: [Bug c++/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Sat, 06 May 2017 18:21:00 -0000
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--- Comment #2 from Armin K. <krejzi at email dot com> ---
Created attachment 41333
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41333&action=edit
Preprocessed source files
Here are the requested files. I apologize for having to compress them, but a
single file exceeded bugzilla file size limit (1.1 MB).
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Subject: [Bug tree-optimization/78496] [7/8 Regression] Missed opportunities for jump threading
Date: Sat, 06 May 2017 20:12:00 -0000
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--- Comment #10 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Sat May 6 18:20:31 2017
New Revision: 247722
URL: https://gcc.gnu.org/viewcvs?rev=247722&root=gcc&view=rev
Log:
PR tree-optimization/78496
* tree-vrp.c (simplify_assert_expr_using_ranges): Remove debugging
code.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vrp.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80654] is_trivially_copy_constructible fails with compiler error with vector of uncopyable objects
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Daniel Krügler <daniel.kruegler at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.kruegler@googlemail.
| |com
--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
Here are two problems involved:
1) std::vector's copy constructor is not SFINAE-friendly and causes
std::is_copy_constructible to evaluate to true regradless of it's element type.
This is a QoI issue but not a violation of the requirements of the standard.
2) The more serious problem is that the intrinsic __is_trivially_constructible
is the actual cause of the non-silent response here. This can be demonstrated
by evaluating the statement
__is_trivially_constructible(std::vector<nocopy>, const std::vector<nocopy>&);
which results in the following compiler error:
//----------------------------
H:\Develop\Cpp\C++0x\ScratchBook\main.cpp||In function 'int main()':|
H:\Develop\Cpp\C++0x\ScratchBook\main.cpp|28|warning: statement has no effect
[-Wunused-value]|
c:\program files\develop\gcc\include\c++\8.0.0\bits\stl_construct.h||In
instantiation of 'void std::_Construct(_T1*, _Args&& ...) [with _T1 = nocopy;
_Args = {const nocopy&}]':|
c:\program
files\develop\gcc\include\c++\8.0.0\bits\stl_uninitialized.h|83|required from
'static _ForwardIterator
std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator,
_InputIterator, _ForwardIterator) [with _InputIterator =
__gnu_cxx::__normal_iterator<const nocopy*, std::vector<nocopy> >;
_ForwardIterator = nocopy*; bool _TrivialValueTypes = false]'|
c:\program
files\develop\gcc\include\c++\8.0.0\bits\stl_uninitialized.h|134|required from
'_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator,
_ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const
nocopy*, std::vector<nocopy> >; _ForwardIterator = nocopy*]'|
c:\program
files\develop\gcc\include\c++\8.0.0\bits\stl_uninitialized.h|289|required from
'_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator,
_ForwardIterator, std::allocator<_Tp>&) [with _InputIterator =
__gnu_cxx::__normal_iterator<const nocopy*, std::vector<nocopy> >;
_ForwardIterator = nocopy*; _Tp = nocopy]'|
c:\program files\develop\gcc\include\c++\8.0.0\bits\stl_vector.h|331|required
from 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with
_Tp = nocopy; _Alloc = std::allocator<nocopy>]'|
H:\Develop\Cpp\C++0x\ScratchBook\main.cpp|28|required from here|
c:\program files\develop\gcc\include\c++\8.0.0\bits\stl_construct.h|75|error:
use of deleted function 'nocopy::nocopy(const nocopy&)'|
H:\Develop\Cpp\C++0x\ScratchBook\main.cpp|18|note: declared here|
||=== Build failed: 1 error(s), 7 warning(s) (0 minute(s), 0 second(s)) ===|
//----------------------------
Note that evaluating
std::is_copy_constructible<std::vector<nocopy>>
alone doesn't spit at the programmer, but happily instantiates.
The only clean choice is to fix the __is_trivially_constructible intrinsic.
Wrapping the current call of that intrinsic by expanding the current
std::is_trivially_copy_constructible definition as follows
template<typename _Tp>
struct __is_trivially_constructible_delayed
: public integral_constant<bool,
__is_trivially_constructible(_Tp, const _Tp&)>
{ };
template<typename _Tp>
struct is_trivially_copy_constructible
: public __and_<is_copy_constructible<_Tp>,
__is_trivially_constructible_delayed<_Tp>>
{ };
wouldn't solve the problem, because due to the wrong positive result of
std::is_copy_constructible<std::vector<nocopy>> the protected
__is_trivially_constructible_delayed would still be instantiated.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80656] New: mips64-linux cross build fails: Link tests are not allowed after GCC_NO_EXECUTABLES
Date: Sat, 06 May 2017 20:30:00 -0000
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Bug ID: 80656
Summary: mips64-linux cross build fails: Link tests are not
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Product: gcc
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The build fails at least in libquadmath or libssp.
checking whether the /tmp/build/./gcc/xgcc -B/tmp/build/./gcc/
-B/opt/cross/mips64-linux/bin/ -B/opt/cross/mips64-linux/lib/ -isystem
/opt/cross/mips64-linux/include -isystem /opt/cross/mips64-linux/sys-include
linker (/tmp/build/./gcc/collect-ld) supports shared libraries... yes
checking dynamic linker characteristics... configure: error: Link tests are not
allowed after GCC_NO_EXECUTABLES.
make[1]: *** [Makefile:11673: configure-target-libssp] Error 1
make[1]: Leaving directory '/tmp/build'
make: *** [Makefile:894: all] Error 2
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Subject: [Bug bootstrap/80656] mips64-linux cross build fails: Link tests are not allowed after GCC_NO_EXECUTABLES
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--- Comment #1 from felix-gcc at fefe dot de ---
Turns out my libc was installed incorrectly.
Retrying now. I'm still getting this build error in libgomp and libstdc++.
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80648
Keith Thompson <Keith.S.Thompson at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Keith Thompson <Keith.S.Thompson at gmail dot com> ---
http://open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#903
I don't believe this DR applies to C++11.
The header does say "Status: CD3", but the next line is:
> [Moved to DR status at the April, 2013 meeting.]
with an this at the bottom:
Additional note (January, 2013):
> Concerns were raised at the Portland (October, 2012) meeting that
> the value false has been used in existing code as a null pointer
> constant, and such code would be broken by this change. This issue
> has been returned to "review" status to allow discussion of whether
> to accommodate such code or not.
And at the very top of the cwg_defects.html page:
> Issues with DR, accepted, DRWP, and WP status are NOT part of the
> International Standard for C++.
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Subject: [Bug c++/80649] value-initialization rather than default-initialization at some optimization levels
Date: Sat, 06 May 2017 21:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80649
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your example has undefined behaviour, you can't assume that a value present
before a constructor is still present afterwards.
See "More aggressive optimization of -flifetime-dse" at
https://gcc.gnu.org/gcc-6/porting_to.html
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sat, 06 May 2017 21:44:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's a DR, we (In reply to Keith Thompson from comment #2)
> > [Moved to DR status at the April, 2013 meeting.]
Which means it's a DR against C++11, because it can't be a DR against C++14 in
2013 because there was no C++14 in 2013. So as a DR against C++11 we implement
it in C++11 mode.
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Subject: [Bug fortran/80657] New: Loop in character function declaration
Date: Sat, 06 May 2017 21:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80657
Bug ID: 80657
Summary: Loop in character function declaration
Product: gcc
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The following forces gfortran into a loop:
function f(x)
implicit character(len(f)) (x)
character(len(x)) f
end
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 7.1.0
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Subject: [Bug middle-end/67486] ira-color.c sanitizer detects signed integer overflow
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--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 7.1.0
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--- Comment #6 from Vittorio Zecca <zeccav at gmail dot com> ---
Still there in 7.1.0
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Subject: [Bug fortran/61908] load of invalid value for 'expr_t' in interface.c compare_actual_formal
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Vittorio Zecca <zeccav at gmail dot com> changed:
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
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Subject: [Bug fortran/67498] interface.c sanitizer runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
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Vittorio Zecca <zeccav at gmail dot com> changed:
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--- Comment #6 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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Bug 63426 depends on bug 61908, which changed state.
Bug 61908 Summary: load of invalid value for 'expr_t' in interface.c compare_actual_formal
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61908
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Subject: [Bug fortran/77327] AddressSanitizer: heap-use-after-free gcc-trunk-239276/gcc/fortran/interface.c:403 in compare_components
Date: Sat, 06 May 2017 21:52:00 -0000
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Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed in 7.1.0
>From gcc-bugs-return-562789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 21:52:05 2017
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From: "fredrik.hederstierna@securitas-direct.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/67213] When compiling for size with -Os loops can get bigger after peeling
Date: Sat, 06 May 2017 22:05:00 -0000
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--- Comment #5 from Fredrik Hederstierna <fredrik.hederstierna@securitas-direct.com> ---
Still same in GCC-7.1.0.
I analyzed using -fdump-tree-cunroll-details
void test_iter_6(void)
{
int i;
for (i = 0; i < 6; i++) {
data[i] = i;
}
}
The function was generated "test_iter_6":
0000001c <test_iter_6>:
1c: e59f3030 ldr r3, [pc, #48] ; 54 <test_iter_6+0x38>
20: e3a02000 mov r2, #0
24: e5c32000 strb r2, [r3]
28: e3a02001 mov r2, #1
2c: e5c32001 strb r2, [r3, #1]
30: e3a02002 mov r2, #2
34: e5c32002 strb r2, [r3, #2]
38: e3a02003 mov r2, #3
3c: e5c32003 strb r2, [r3, #3]
40: e3a02004 mov r2, #4
44: e5c32004 strb r2, [r3, #4]
48: e3a02005 mov r2, #5
4c: e5c32005 strb r2, [r3, #5]
50: e12fff1e bx lr
54: 00000000 .word 0x00000000
With "--param max-completely-peel-times=4" (instead of default 5) it became
0000001c <test_iter_6>:
1c: e59f2014 ldr r2, [pc, #20] ; 38 <test_iter_6+0x1c>
20: e3a03000 mov r3, #0
24: e7c33002 strb r3, [r3, r2]
28: e2833001 add r3, r3, #1
2c: e3530006 cmp r3, #6
30: 1afffffb bne 24 <test_iter_6+0x8>
34: e12fff1e bx lr
38: 00000000 .word 0x00000000
It seems like "try_unroll_loop_completely()" in file "tree-ssa-loop-ivcanon.c"
think it could fold counting variable, but maybe its not possible since its
used as both index and as RHS value?
;; Function test_iter_6 (test_iter_6, funcdef_no=1, decl_uid=4067,
cgraph_uid=1)
Analyzing # of iterations of loop 1
exit condition [5, + , 4294967295] != 0
bounds on difference of bases: -5 ... -5
result:
# of iterations 5, bounded by 5
Analyzing # of iterations of loop 1
exit condition [5, + , 4294967295] != 0
bounds on difference of bases: -5 ... -5
result:
# of iterations 5, bounded by 5
Statement (exit)if (ivtmp_7 != 0)
is executed at most 5 (bounded by 5) + 1 times in loop 1.
Induction variable (int) 0 + 1 * iteration does not wrap in statement data[i_9]
= _4;
in loop 1.
Statement data[i_9] = _4;
is executed at most 9 (bounded by 9) + 1 times in loop 1.
Induction variable (int) 1 + 1 * iteration does not wrap in statement i_6 = i_9
+ 1;
in loop 1.
Statement i_6 = i_9 + 1;
is executed at most 2147483646 (bounded by 2147483646) + 1 times in loop 1.
Loop 1 iterates 5 times.
Loop 1 iterates at most 5 times.
Estimating sizes for loop 1
BB: 3, after_exit: 0
size: 0 _4 = (char) i_9;
Induction variable computation will be folded away.
size: 1 data[i_9] = _4;
size: 1 i_6 = i_9 + 1;
Induction variable computation will be folded away.
size: 1 ivtmp_7 = ivtmp_1 - 1;
Induction variable computation will be folded away.
size: 2 if (ivtmp_7 != 0)
Exit condition will be eliminated in peeled copies.
BB: 4, after_exit: 1
size: 5-4, last_iteration: 5-2
Loop size: 5
Estimated size after unrolling: 5
Though produced code with peeling become
test_iter_6 ()
{
int i;
char _4;
unsigned int ivtmp_7;
char _12;
unsigned int ivtmp_15;
char _19;
unsigned int ivtmp_22;
char _26;
unsigned int ivtmp_29;
char _33;
unsigned int ivtmp_36;
char _40;
unsigned int ivtmp_43;
<bb 2>:
_12 = 0;
data[0] = _12;
i_14 = 1;
ivtmp_15 = 5;
_19 = (char) i_14;
data[i_14] = _19;
i_21 = i_14 + 1;
ivtmp_22 = ivtmp_15 + 4294967295;
_26 = (char) i_21;
data[i_21] = _26;
i_28 = i_21 + 1;
ivtmp_29 = ivtmp_22 + 4294967295;
_33 = (char) i_28;
data[i_28] = _33;
i_35 = i_28 + 1;
ivtmp_36 = ivtmp_29 + 4294967295;
_40 = (char) i_35;
data[i_35] = _40;
i_42 = i_35 + 1;
ivtmp_43 = ivtmp_36 + 4294967295;
_4 = (char) i_42;
data[i_42] = _4;
i_6 = i_42 + 1;
ivtmp_7 = ivtmp_43 + 4294967295;
return;
}
instead of original and shorter
test_iter_6 ()
{
int i;
unsigned int ivtmp_1;
char _4;
unsigned int ivtmp_7;
<bb 2>:
<bb 3>:
# i_9 = PHI <i_6(4), 0(2)>
# ivtmp_1 = PHI <ivtmp_7(4), 6(2)>
_4 = (char) i_9;
data[i_9] = _4;
i_6 = i_9 + 1;
ivtmp_7 = ivtmp_1 - 1;
if (ivtmp_7 != 0)
goto <bb 4>;
else
goto <bb 5>;
<bb 4>:
goto <bb 3>;
<bb 5>:
return;
}
Could it be that somewhat since that index also is used as data that variable
cannot be folded away like
size: 1 i_6 = i_9 + 1;
Induction variable computation will be folded away.
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Subject: [Bug tree-optimization/67213] When compiling for size with -Os loops can get bigger after peeling
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--- Comment #6 from Fredrik Hederstierna <fredrik.hederstierna@securitas-direct.com> ---
Same thing for x86, not only ARM:
bash# gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
bash# gcc -c test.c -Os --param max-completely-peel-times=5
bash# objdump -dath test.o
Disassembly of section .text:
000000000000000f <test_iter_6>:
f: c6 05 00 00 00 00 00 movb $0x0,0x0(%rip) # 16
<test_iter_6+0x7>
16: c6 05 00 00 00 00 01 movb $0x1,0x0(%rip) # 1d
<test_iter_6+0xe>
1d: c6 05 00 00 00 00 02 movb $0x2,0x0(%rip) # 24
<test_iter_6+0x15>
24: c6 05 00 00 00 00 03 movb $0x3,0x0(%rip) # 2b
<test_iter_6+0x1c>
2b: c6 05 00 00 00 00 04 movb $0x4,0x0(%rip) # 32
<test_iter_6+0x23>
32: c6 05 00 00 00 00 05 movb $0x5,0x0(%rip) # 39
<test_iter_6+0x2a>
39: c3 retq
bash# gcc -c test.c -Os --param max-completely-peel-times=4
bash# objdump -dath test.o
Disassembly of section .text:
000000000000000f <test_iter_6>:
f: 31 c0 xor %eax,%eax
11: 88 80 00 00 00 00 mov %al,0x0(%rax)
17: 48 ff c0 inc %rax
1a: 48 83 f8 06 cmp $0x6,%rax
1e: 75 f1 jne 11 <test_iter_6+0x2>
20: c3 retq
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sat, 06 May 2017 22:50:00 -0000
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--- Comment #4 from Keith Thompson <Keith.S.Thompson at gmail dot com> ---
Then what does
> Issues with DR, accepted, DRWP, and WP status are NOT part of the
> International Standard for C++.
mean? The web page itself says that issues with DR status are not
part of C++11.
>From gcc-bugs-return-562792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 06 22:50:27 2017
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Subject: [Bug libstdc++/80658] New: Memory leak reported in libstdc++ (zerotier)
Date: Sun, 07 May 2017 00:33:00 -0000
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Bug ID: 80658
Summary: Memory leak reported in libstdc++ (zerotier)
Product: gcc
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This not very friendly blog entry contains a report of a memory leak in
libstdc++ ("worst bug of my entire career"):
https://www.zerotier.com/blog/2017-05-05-theleak.shtml
Including a not very easy way to reproduce it (by installing their software and
stress-testing it). Apparently he didn't file a bug report here.
Solution proposed there: link against jemalloc (it's under BSDL), performance
goes up, memory consumption stays low, i.e. neither use glibc's "too slow"
malloc() nor use libstdc++'s memory allocator (still slower than jemalloc).
I don't like this discovery at all, because the implications are too bad...
1. Using your own allocator by default renders tools like valgrind blind.
2. Having two allocators means two times the possibility for bugs. Actually
having about 10 different allocators is even worse ;-).
3. If glibc's malloc is slow, make it faster, don't implement your own
allocator.
There are some limited valid reasons to create your own allocator, but
stdlibc++ shouldn't do that by default. Especially if multi-threading speed of
glibc is too slow, please just fix glibc.
Due to #1, we don't even know how many people are affected by the bug. Memory
leaks caused by the allocator itself aren't detectable by tools that replace
the allocator to find memory leaks (like valgrind), and what's worse: valgrind
doesn't help people to find memory leaks they caused themselves in libstdc++.
I assume that the mt_allocator is used here, because it is easiest to screw up
a multithreaded allocator. Things that can go wrong:
* the handover from local free list to global free list doesn't work as it
should (forgets to add free stuff, race conditions)
* the access to the global free list doesn't work as it should (more race
conditions possible).
* threads terminating forget to merge their free list
* allocating big chunks of memory will not be shared in the global freelist, as
only few allocations happen, not enough to exceed the limit of the local
freelist
...
The documentation of mt_allocator is at least somewhat misleading:
https://gcc.gnu.org/onlinedocs/libstdc++/manual/mt_allocator_impl.html
"Notes about deallocation. This allocator does not explicitly release memory."
Well, it does add freed memory to its freelists and reuse it. It's just not
giving back unused memory to the OS. However, for bigger allocation, using
mmap() and returning the memory to the OS on free is a very good idea.
Related: I have some griefs with glibc's malloc, as well. If you turn on
debugging, so that your program doesn't get a C abort() and could print it's
own diagnostics (usually you want that when you discover that there are memory
corruption bugs), malloc() stops being thread-safe. That is just not at all
helpful. I worked around this by wrapping malloc(), resize() and free() in a
critical section when malloc() debugging is enabled. Ulrich Drepper had that as
"wontfix", because he somehow couldn't see how to implement it. Note that the
debugging version of malloc() doesn't have to be ultra-fast. It's there for
debugging. It can lock a mutex on every call.
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Subject: [Bug c/80659] New: [7 regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
Date: Sun, 07 May 2017 00:37:00 -0000
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Bug ID: 80659
Summary: [7 regression] -fsanitize=address evokes ICE in in
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Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jim at meyering dot net
Target Milestone: ---
The following gets an ICE with gcc 7 (latest from git at git-svn-id:
svn+ssh://gcc.gnu.org/svn/gcc/trunk@247659
138bc75d-0d04-0410-961f-82ee72b054a4), yet gets no ICE with fedora 25's 6.3.1
20161221.
FYI, this was minimized using creduce from emacs/src/process.c.
$ cat bad.c
typedef a;
typedef b;
struct c {
b d
} e() {
union {
struct c f
} g;
switch (g.f.d) {
(a[]){};
h();
}
}
$ gcc -c -fsanitize=address bad.c
bad.c:1:9: warning: type defaults to 'int' in declaration of 'a'
[-Wimplicit-int]
typedef a;
^
bad.c:2:9: warning: type defaults to 'int' in declaration of 'b'
[-Wimplicit-int]
typedef b;
^
bad.c:5:1: warning: no semicolon at end of struct or union
} e() {
^
bad.c: In function 'e':
bad.c:8:3: warning: no semicolon at end of struct or union
} g;
^
bad.c:11:5: warning: implicit declaration of function 'h'
[-Wimplicit-function-declaration]
h();
^
bad.c:10:10: warning: statement will never be executed [-Wswitch-unreachable]
(a[]){};
^
bad.c:9:3: internal compiler error: in gimplify_switch_expr, at gimplify.c:2301
switch (g.f.d) {
^~~~~~
0x7c6d6d gimplify_switch_expr
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:2301
0x7c890a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:11466
0x7ca888 gimplify_stmt(tree_node**, gimple**)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:6517
0x7c8e6b gimplify_statement_list
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:1718
0x7c8e6b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:11686
0x7ca888 gimplify_stmt(tree_node**, gimple**)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:6517
0x7cb1c8 gimplify_bind_expr
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:1292
0x7c86ea gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:11458
0x7ca888 gimplify_stmt(tree_node**, gimple**)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:6517
0x7cbbe7 gimplify_body(tree_node*, bool)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:12455
0x7cbf95 gimplify_function_tree(tree_node*)
/data/users/meyering/x/w/co/gcc/gcc/gimplify.c:12613
0x69cf0f cgraph_node::analyze()
/data/users/meyering/x/w/co/gcc/gcc/cgraphunit.c:657
0x69f6f7 analyze_functions
/data/users/meyering/x/w/co/gcc/gcc/cgraphunit.c:1118
0x6a00d2 symbol_table::finalize_compilation_unit()
/data/users/meyering/x/w/co/gcc/gcc/cgraphunit.c:2603
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-562794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 00:37:01 2017
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Subject: [Bug c++/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Sun, 07 May 2017 00:38:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also what options is being used to invoke GCC?
>From gcc-bugs-return-562795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 00:38:25 2017
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Subject: [Bug c++/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Sun, 07 May 2017 00:47:00 -0000
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--- Comment #4 from Armin K. <krejzi at email dot com> ---
There is a log file in the tarball with all the options. Package is built with
cmake, so there's lot of them.
>From gcc-bugs-return-562796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 00:47:40 2017
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Subject: [Bug c++/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Sun, 07 May 2017 09:42:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm,
_58 = operator new (_5);
__builtin_memset (_58, 0, _5);
_6 = *args#0_11(D);
_7 = (int) _6;
snprintf (_58, _5, format_13(D), _7);
I don't see how -m32 could change the above IR.
>From gcc-bugs-return-562797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 09:42:16 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Sun, 07 May 2017 10:35:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I am not sure what you expect from this PR exactly. If you have issues about
glibc's implementation of malloc, please see about it with glibc (here is for
gcc only). They already know about the performance issue, have at least one guy
(DJ Delorie) working on it, and he is looking for workloads to help him tune
the implementation, search the libc-alpha archives for how to help him.
Personal experience: last time I tried jemalloc, it was slower than glibc for
my application... If there is still some issue with debugging and
multi-threading, try asking them if they have a better idea now of how to
implement it.
The zerotier rant mixes malloc, new and C++ allocators, it mixes what comes
from standard C++ and what is an extension in libstdc++, talks about an
environment variable that was renamed in 2003. In the end, it is so far from a
useful bug report that I can only ignore it (maybe someone with a lot more
time...).
Libstdc++ does not create its own allocator by default, it uses new (which maps
to malloc) by default. To use something like __mt_alloc, you have to include a
header <ext/...> and use something from namespace __gnu_cxx, that's pretty
clearly an explicit use of an extension by the user, not the default.
>From gcc-bugs-return-562798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 10:35:45 2017
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Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
Date: Sun, 07 May 2017 10:42:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #15 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I think that with the current status, where
we have -finline-matmul-limit=30 by default, we
can close this bug.
Agreed?
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Subject: [Bug libfortran/78379] Processor-specific versions for matmul
Date: Sun, 07 May 2017 12:50:00 -0000
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--- Comment #30 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I think there still is one thing to do.
Apparently, AMD CPUs (which use only vanilla at
the moment) are slightly faster with -mprefer-avx128,
and they should be much faster if they have FMA3.
Unless I missed something, it is not possible to
specify something like -mprefer-avx128 as a target
attribute.
What would be the best way to go about this?
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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neil.n.carlson at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |7.1.0
--- Comment #6 from neil.n.carlson at gmail dot com ---
Comment 1 code example segfaults with the 7.1.0 release (and earlier).
Comment 5 code example gives incorrect results with the 7.1.0 release,
but correct results with 6.3 and 5.2 -- a regression.
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Subject: [Bug c/79027] [8 Regression] fold-const.c:11104:1: internal compiler error: Floating point exception
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--- Comment #8 from John David Anglin <danglin at gcc dot gnu.org> ---
The error on the trunk is caused by the middle end trying to do a mode change
between SImode and BLKmode. Tweaking pa_cannot_change_mode_class() to reject
changes to/modes with zero size appears to fix this bug. Running a full build
and check.
The bug has been present for a long time but only recently exposed by a
gcc-8 change and/or selecting the right configure options.
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Subject: [Bug c++/80660] New: Member function pointer optimization affected by incompatible virtual function
Date: Sun, 07 May 2017 14:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80660
Bug ID: 80660
Summary: Member function pointer optimization affected by
incompatible virtual function
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Consider the following code:
struct foo final {
int a = 0;
int b = 0;
void set_a(int p) { a = p; }
void set_b(int p) { b = p; }
#ifdef VIRT
virtual int get_a() const { return a; }
#endif
};
void (foo::*set)(int);
foo fobj1;
void bar1(int a) {
(fobj1.*set)(a);
}
When compiling with optimization and VIRT not defined the code generated for
bar1 does correctly so elide the test for a virtual function and saves code and
time at execution time.
Adding any virtual function (such as by defining VIRT) changes this. All of
the sudden the entire member function pointer call sequence is emitted.
This is unnecessary, though, since the present virtual function is incompatible
with the member function pointer 'set'. Therefore the generated code should be
the same, with or without get_a defined.
>From gcc-bugs-return-562803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 14:46:40 2017
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Subject: [Bug testsuite/80661] New: make check-gcc RUNTESTFLAGS="dg.exp=g*" runs all the tests in gcc.dg
Date: Sun, 07 May 2017 15:02:00 -0000
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Bug ID: 80661
Summary: make check-gcc RUNTESTFLAGS="dg.exp=g*" runs all the
tests in gcc.dg
Product: gcc
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It is my understanding that the command
make check-gcc RUNTESTFLAGS="dg.exp=a*"
runs all the tests in gcc.dg starting with an 'a' (same thing for g++ and
gfortran). AFAICT (on darwin) this is true except when 'a' is replaced with
'g', 'o', or 't' (all the letters tested with gfortran). Is anybody
understanding what is special with these three letters?
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Sun, 07 May 2017 15:05:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Comment 5 code example gives incorrect results with the 7.1.0 release,
> but correct results with 6.3 and 5.2 -- a regression.
Likely caused by revision r241439. AFAICT this could be two different PRs.
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Subject: [Bug fortran/80657] Loop in character function declaration
Date: Sun, 07 May 2017 15:11:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-07
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
With an instrumented gfortran I get
==71082==ERROR: AddressSanitizer: stack-overflow on address 0x7fff5bc00e30 (pc
0x0001000df430 bp 0x7fff5bc01030 sp 0x7fff5bc00e00 T0)
#0 0x1000df42f in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df42f)
#1 0x1000df7b3 in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df7b3)
#2 0x1000df98b in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df98b)
#3 0x1000df7b3 in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df7b3)
...
with a repeated pattern
#4 0x1000df98b in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df98b)
#5 0x1000df7b3 in gfc_traverse_expr(gfc_expr*, gfc_symbol*, bool
(*)(gfc_expr*, gfc_symbol*, int*), int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1000df7b3)
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Subject: [Bug tree-optimization/78496] [7/8 Regression] Missed opportunities for jump threading
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--- Comment #11 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Sun May 7 15:10:55 2017
New Revision: 247727
URL: https://gcc.gnu.org/viewcvs?rev=247727&root=gcc&view=rev
Log:
2017-05-07 Jeff Law <law@redhat.com>
Revert:
2017-05-06 Jeff Law <law@redhat.com>
PR tree-optimization/78496
* tree-vrp.c (simplify_assert_expr_using_ranges): Remove debugging
code.
PR tree-optimization/78496
* tree-vrp.c (simplify_assert_expr_using_ranges): New function.
(simplify_stmt_using_ranges): Call it.
(vrp_dom_walker::before_dom_children): Extract equivalences
from an ASSERT_EXPR with an equality comparison against a
constant.
Revert:
2017-05-06 Jeff Law <law@redhat.com>
PR tree-optimization/78496
* gcc.dg/tree-ssa/ssa-thread-16.c: New test.
* gcc.dg/tree-ssa/ssa-thread-17.c: New test.
Removed:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-16.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-17.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Sun, 07 May 2017 15:56:00 -0000
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I don't see this one on darwin, but (not darwin specific, between r247578 and
r247584, likely r247578 and/or r247581)
gfc /opt/gcc/_clean/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90 -O3
-m32
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0:
iregion = grid_index_region (iarg) !
Warning: '__builtin_memcpy' specified size between 2147483648 and 4294967295
exceeds maximum object size 2147483647 [-Wstringop-overflow=]
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Subject: [Bug fortran/80657] Loop in character function declaration
Date: Sun, 07 May 2017 16:43:00 -0000
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--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
You do not get line numbers but offset in f951.
Need rebuild with -g option or addr2line usage?
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Subject: [Bug c++/66153] Internal compiler error in nested template function
Date: Sun, 07 May 2017 16:45:00 -0000
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--- Comment #6 from Peter Boyle <paboyle at ph dot ed.ac.uk> ---
Just an update:
Still fails in G++ 7.1.0 and in 8.0.0 (head) on Wandbox.
Still passes in Clang 4.0.0 and 5.0.0(head).
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Subject: [Bug c++/66153] Internal compiler error in nested template function
Date: Sun, 07 May 2017 17:52:00 -0000
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--- Comment #7 from Peter Boyle <paboyle at ph dot ed.ac.uk> ---
Signature of fail in 8.0.0 (head) is:
^~~~
prog.cc: In substitution of 'template<int N, class obj> Container<decltype
(function<N>(arg.data[0]))> function(const Container<obj>&) [with int N = 1;
obj = <missing>]':
prog.cc:43:101: recursively required by substitution of 'template<int N,
class obj> Container<decltype (function<N>(arg.data[0]))> function(const
Container<obj>&) [with int N = 1; obj = <missing>]'
prog.cc:43:101: required by substitution of 'template<int N, class obj>
Container<decltype (function<N>(arg.data[0]))> function(const Container<obj>&)
[with int N = 1; obj = <missing>]'
prog.cc:45:33: required from 'Container<decltype (function<N>(arg.data[0]))>
function(const Container<obj>&) [with int N = 1; obj =
Recursive<Recursive<std::complex<double> > >]'
prog.cc:58:26: required from here
prog.cc:43:101: fatal error: template instantiation depth exceeds maximum of
900 (use -ftemplate-depth= to increase the maximum)
template<int N,class obj> auto function(const Container<obj> & arg)->
Container<decltype(function<N>(arg.data[0]))>
~~~~~~~~~~~^~~~~~~~~~~~~
compilation terminated.
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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/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
Date: Sun, 07 May 2017 17:54:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |janus at gcc dot gnu.org
Summary|[F03] ICE in |[OOP] ICE in
|generate_finalization_wrapp |generate_finalization_wrapp
|er, at fortran/class.c:1992 |er, at fortran/class.c:1992
--- Comment #5 from janus at gcc dot gnu.org ---
This draft patch fixes the ICE on comment 0 and comment 4:
Index: gcc/fortran/resolve.c
===================================================================
--- gcc/fortran/resolve.c (revision 247264)
+++ gcc/fortran/resolve.c (working copy)
@@ -12385,26 +12385,23 @@ gfc_resolve_finalizers (gfc_symbol* derived, bool
if (parent)
gfc_resolve_finalizers (parent, finalizable);
- /* Return early when not finalizable. Additionally, ensure that derived-type
- components have a their finalizables resolved. */
- if (!derived->f2k_derived || !derived->f2k_derived->finalizers)
+ /* Ensure that derived-type components have a their finalizers resolved. */
+ bool has_final = derived->f2k_derived && derived->f2k_derived->finalizers;
+ for (c = derived->components; c; c = c->next)
+ if (c->ts.type == BT_DERIVED
+ && !c->attr.pointer && !c->attr.proc_pointer && !c->attr.allocatable)
+ {
+ bool has_final2 = false;
+ if (!gfc_resolve_finalizers (c->ts.u.derived, &has_final2))
+ return false; /* Error. */
+ has_final = has_final || has_final2;
+ }
+ /* Return early if not finalizable. */
+ if (!has_final)
{
- bool has_final = false;
- for (c = derived->components; c; c = c->next)
- if (c->ts.type == BT_DERIVED
- && !c->attr.pointer && !c->attr.proc_pointer &&
!c->attr.allocatable)
- {
- bool has_final2 = false;
- if (!gfc_resolve_finalizers (c->ts.u.derived, &has_final))
- return false; /* Error. */
- has_final = has_final || has_final2;
- }
- if (!has_final)
- {
- if (finalizable)
- *finalizable = false;
- return true;
- }
+ if (finalizable)
+ *finalizable = false;
+ return true;
}
/* Walk over the list of finalizer-procedures, check them, and if any one
Regtesting now ...
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Subject: [Bug fortran/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
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Subject: [Bug c++/79639] [6 Regression] ICE with -O and constexpr
Date: Sun, 07 May 2017 18:38:00 -0000
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
--- Comment #7 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Fixed by Jakub's patch.
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Subject: [Bug fortran/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
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--- Comment #6 from janus at gcc dot gnu.org ---
(In reply to janus from comment #5)
> This draft patch fixes the ICE on comment 0 and comment 4:
>
> [..]
>
> Regtesting now ...
The regtest went pretty well, although I'm seeing these three failures:
FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
FAIL: gfortran.dg/mvbits_7.f90 -O0 (test for warnings, line 28)
But I think they are unrelated and also occur without my patch. Will check.
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Subject: [Bug c++/79681] [6 Regression] ICE with constexpr and bitfield
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail| |5.1.0, 6.1.0, 6.3.0
--- Comment #10 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Fixed by Jakub's patch.
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Subject: [Bug c++/79664] ICE with #pragma omp parallel in constexpr function
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.3.1, 7.1.0
Target Milestone|--- |6.4
Known to fail| |5.1.0, 6.1.0, 6.3.0
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Subject: [Bug fortran/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
Date: Sun, 07 May 2017 19:41:00 -0000
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--- Comment #7 from janus at gcc dot gnu.org ---
(In reply to janus from comment #6)
> The regtest went pretty well, although I'm seeing these three failures:
>
> FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
> FAIL: gfortran.dg/coarray_lock_7.f90 -O scan-tree-dump-times original
> FAIL: gfortran.dg/mvbits_7.f90 -O0 (test for warnings, line 28)
>
> But I think they are unrelated and also occur without my patch. Will check.
Indeed I see those also on a clean trunk.
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Sun, 07 May 2017 20:19:00 -0000
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--- Comment #4 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Author: reichelt
Date: Sun May 7 19:41:09 2017
New Revision: 247728
URL: https://gcc.gnu.org/viewcvs?rev=247728&root=gcc&view=rev
Log:
PR translation/80280
* call.c (print_z_candidate): Fix quoting.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sun, 07 May 2017 21:39:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Whether or not it's part of the standard has no bearing on whether it's a bug
in GCC, because we don't claim to implement just the original published
standard. GCC's policy is to implement the standard plus DRs. It's a DR, so the
fact we implement it is not a GCC bug, it's policy.
>From gcc-bugs-return-562820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 07 21:39:35 2017
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sun, 07 May 2017 21:44:00 -0000
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--- Comment #6 from Keith Thompson <Keith.S.Thompson at gmail dot com> ---
Shall I submit a separate ticket against the documentation?
"info gcc" for gcc-7.1.0 has the following description for -std=c=+98 and
std=++03:
'c++98'
'c++03'
The 1998 ISO C++ standard plus the 2003 technical corrigendum
and some additional defect reports. Same as '-ansi' for C++
code.
and this for -std=c++11 and -std=c++0x:
'c++11'
'c++0x'
The 2011 ISO C++ standard plus amendments. The name 'c++0x'
is deprecated.
Both should mention DRs.
(I question the policy of implementing DRs that have not been approved
by the committee. As I understand it, the existence of a DR merely means
that *someone* thinks there's a defect in the standard. Many DRs are
eventually rejected.)
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sun, 07 May 2017 22:46:00 -0000
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Keith Thompson from comment #6)
> Shall I submit a separate ticket against the documentation?
>
> "info gcc" for gcc-7.1.0 has the following description for -std=c=+98 and
> std=++03:
>
> 'c++98'
> 'c++03'
> The 1998 ISO C++ standard plus the 2003 technical corrigendum
> and some additional defect reports. Same as '-ansi' for C++
> code.
>
> and this for -std=c++11 and -std=c++0x:
>
> 'c++11'
> 'c++0x'
> The 2011 ISO C++ standard plus amendments. The name 'c++0x'
> is deprecated.
>
> Both should mention DRs.
amendments is listed there which includes DR as far as I can tell.
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Sun, 07 May 2017 23:20:00 -0000
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--- Comment #8 from Keith Thompson <Keith.S.Thompson at gmail dot com> ---
That's a surprising interpretation of the word "amendment".
Searching isocpp.org and other sites, I haven't found any official reference
to an "amendment" to the C++ standard. The nearest thing I've found, which
is referenced in the gcc documentation, is the 1995 amendment to the 1990
ISO C standard, "ANSI/ISO/IEC 9899-1990/AM 1-1995". That's definitely not
a DR. (The C and C++ standard committees use similar procedures.)
Does g++ implement *all* DRs reported against C++11?
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Subject: [Bug tree-optimization/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
Date: Mon, 08 May 2017 02:07:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2017-05-06 00:00:00 |2017-05-07
CC| |msebor at gcc dot gnu.org
Component|c++ |tree-optimization
Ever confirmed|0 |1
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The warning can be suppressed by changing the invocation of the
vector ctor to be passed an unsigned type, e.g., like so:
std::vector<char> longer_message(size + 1U);
The gimple-ssa-sprintf pass sees this. It's almost as though size_14 was being
considered to be unsigned.
<bb 2> [100.00%]:
...
size_14 = snprintf (&message, 256, format_12(D), _2);
...
<bb 5> [50.00%]:
if (size_14 >= 0) <<< given size_14 is int,
goto <bb 6>; [46.68%]
else
goto <bb 13>; [53.32%]
<bb 6> [23.34%]:
_4 = size_14 + 1; <<< and given this,
...
if (_4 != 0) <<< how could this not hold...
goto <bb 7>; [33.00%]
else
goto <bb 19>; [67.00%] <<< ...and this branch be taken?
...
<bb 7> [7.70%]:
_61 = operator new (_5);
__builtin_memset (_61, 0, _5);
...
snprintf (_61, _5, format_12(D), _7);
...
<bb 19> [15.64%]:
__builtin_memset (0B, 0, _5);
...
snprintf (0B, _5, format_12(D), _85);
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80662] New: libstdc++ basic_string casting oddity
Date: Mon, 08 May 2017 02:08:00 -0000
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Bug ID: 80662
Summary: libstdc++ basic_string casting oddity
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
Target: x86-64
// https://twitter.com/zxovq/status/861377261827629057
#include <sstream>
#include <string>
class my_stream : public std::stringstream {
public:
operator std::string() const
{
return std::stringstream::str();
}
template<typename T>
my_stream& operator<<(T&& value)
{
std::stringstream::operator<<(std::forward<T>(value));
return *this;
}
};
int main(void)
{
// for an unknown reason gcc 7.1 implicitly casts (my_stream{} << "")
// to std::basic_ostream& instead of using my_stream&
// gcc 6.3 is fine; uncomment static_cast below to make gcc 7.1 work
std::string s{/*static_cast<my_stream&>*/(my_stream{} << "hello world")};
}
<source>: In function 'int main()':
<source>:24:76: error: no matching function for call to
'std::__cxx11::basic_string<char>::basic_string(<brace-enclosed initializer
list>)'
std::string s{/*static_cast<my_stream&>*/(my_stream{} << "hello world")};
^
In file included from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/string:52:0,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/locale_classes.h:40,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/ios_base.h:41,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/ios:42,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/istream:38,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/sstream:38,
from <source>:1:
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:588:9:
note: candidate: template<class _InputIterator, class>
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&)
basic_string(_InputIterator __beg, _InputIterator __end,
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:588:9:
note: template argument deduction/substitution failed:
<source>:24:76: note: candidate expects 3 arguments, 1 provided
std::string s{/*static_cast<my_stream&>*/(my_stream{} << "hello world")};
^
In file included from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/string:52:0,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/locale_classes.h:40,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/ios_base.h:41,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/ios:42,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/istream:38,
from
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/sstream:38,
from <source>:1:
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:550:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&,
const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>]
basic_string(basic_string&& __str, const _Alloc& __a)
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:550:7:
note: candidate expects 2 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:546:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>]
basic_string(const basic_string& __str, const _Alloc& __a)
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:546:7:
note: candidate expects 2 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:542:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT =
char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]
basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:542:7:
note: no known conversion for argument 1 from 'std::basic_ostream<char>' to
'std::initializer_list<char>'
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:515:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
[with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>]
basic_string(basic_string&& __str) noexcept
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:515:7:
note: no known conversion for argument 1 from 'std::basic_ostream<char>' to
'std::__cxx11::basic_string<char>&&'
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:503:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::size_type, _CharT, const _Alloc&) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:503:7:
note: candidate expects 3 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:493:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char;
_Traits = std::char_traits<char>; _Alloc = std::allocator<char>]
basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:493:7:
note: no known conversion for argument 1 from 'std::basic_ostream<char>' to
'const char*'
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:483:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT,
_Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
basic_string(const _CharT* __s, size_type __n,
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:483:7:
note: candidate expects 3 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:465:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&)
[with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::size_type = long unsigned int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:465:7:
note: candidate expects 4 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:449:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT =
char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:449:7:
note: candidate expects 3 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:434:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const
_Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::size_type = long unsigned int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:434:7:
note: candidate expects 3 arguments, 1 provided
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:421:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>]
basic_string(const basic_string& __str)
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:421:7:
note: no known conversion for argument 1 from 'std::basic_ostream<char>' to
'const std::__cxx11::basic_string<char>&'
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:413:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>]
basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:413:7:
note: no known conversion for argument 1 from 'std::basic_ostream<char>' to
'const std::allocator<char>&'
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:404:7:
note: candidate: std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>]
basic_string()
^~~~~~~~~~~~
/opt/compiler-explorer/gcc-7.1.0/include/c++/7.1.0/bits/basic_string.h:404:7:
note: candidate expects 0 arguments, 1 provided
Compiler exited with result code 1
>From gcc-bugs-return-562825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 02:08:30 2017
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Subject: [Bug libstdc++/80662] libstdc++ basic_string casting oddity
Date: Mon, 08 May 2017 07:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80662
David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
CC| |jwakely.gcc at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-562826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 07:01:04 2017
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80663] New: signed integer overflow in ipa-split.c
Date: Mon, 08 May 2017 07:48:00 -0000
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Bug ID: 80663
Summary: signed integer overflow in ipa-split.c
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
// from PR ipa/80212
// { dg-options "-O2 --param partial-inlining-entry-probability=1234567" }
// gcc/ipa-split.c:448:4: runtime error: signed integer overflow: 10000 *
1234567 cannot be represented in type 'int'
// ipa-split.c:448 "* PARAM_VALUE (PARAM_PARTIAL_INLINING_ENTRY_PROBABILITY) /
100))"
struct b
{
};
struct d : virtual b
{
};
main () { d a; }
>From gcc-bugs-return-562827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 07:49:02 2017
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Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Mon, 08 May 2017 08:09:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |msebor at gcc dot gnu.org
Target Milestone|--- |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The latter diagnostic is a latent bug in -Wstringop-overflow, I see that on
x86_64-unknown-linux-gnu when testing with -m32. Possibly from
[/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0]
# RANGE [-2147483648, 2147483647] NONZERO 4294967292
_9 = ubound.2_35 * 4;
[/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0]
# RANGE [0, 4294967295] NONZERO 4294967292
_10 = (character(kind=4)) _9;
[/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0]
# RANGE [1, 4294967295]
_11 = MAX_EXPR <_10, 1>;
[/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0]
# PT = null { D.3745 } (escaped, escaped heap)
# ALIGN = 4, MISALIGN = 0
# USE = nonlocal null { D.3745 D.3746 } (escaped, escaped heap)
# CLB = nonlocal null { D.3745 D.3746 } (escaped, escaped heap)
_70 = __builtin_malloc (_11);
[/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0]
# USE = nonlocal null { D.3745 D.3746 } (escaped, escaped heap)
# CLB = nonlocal null { D.3745 D.3746 } (escaped, escaped heap)
__builtin_memcpy (_70, _8, _10);
not sure how it arrives at the minimum of 2147483648 or at the maximum object
size of 2147483647. Note that the memcpy should probably use the same
size argument as the malloc call (FE issue).
>From gcc-bugs-return-562828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:09:03 2017
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Subject: [Bug tree-optimization/80641] [7/8 Regression] Warning with std::vector resize in loop
Date: Mon, 08 May 2017 08:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80641
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |7.2
Summary|Warning with std::vector |[7/8 Regression] Warning
|resize in loop |with std::vector resize in
| |loop
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The warning could be improved to print the size signed or say that a negative
number passed as size is likely the reason.
It looks like the memset call is produced by loop distribution:
<bb 11> [9.15%]:
-
- <bb 12> [51.85%]:
- # __niter_77 = PHI <__niter_59(13), 18446744073709551615(11)>
- # __first_61 = PHI <__first_60(13), c$D15833$_M_impl$_M_finish_68(11)>
- *__first_61 = 0;
- __niter_59 = __niter_77 + 18446744073709551615;
- __first_60 = __first_61 + 4;
- if (__niter_59 == 0)
- goto <bb 5>; [17.65%]
- else
- goto <bb 13>; [82.35%]
-
- <bb 13> [42.70%]:
- goto <bb 12>; [100.00%]
+ __builtin_memset (c$D15833$_M_impl$_M_finish_68, 0, 18446744073709551612);
+ goto <bb 5>; [17.65%]
where the loop iterates { -1, +, -1 } thus quite a bit... This is all
guarded by an overflow check it seems:
<bb 9> [85.56%]:
sz_13 = _17 + 18446744073709551615;
if (sz_13 > _17)
goto <bb 10>; [29.56%]
else
goto <bb 15>; [70.44%]
so maybe libstdc++ could avoid this bogus loop.
>From gcc-bugs-return-562829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:20:38 2017
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Subject: [Bug debug/80646] [5/6/7 Regression] wrong type info for extern inline function when compiling Emacs
Date: Mon, 08 May 2017 08:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |4.9.4
Keywords| |wrong-debug
Last reconfirmed| |2017-05-08
Ever confirmed|0 |1
Summary|[Regression] wrong type |[5/6/7 Regression] wrong
|info for extern inline |type info for extern inline
|function when compiling |function when compiling
|Emacs |Emacs
Target Milestone|--- |5.5
Known to fail| |5.4.0, 6.3.0, 7.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With GCC 7.1 we get
(gdb) ptype make_number
type = struct {
long i;
} (long)
(gdb) ptype make_natnum
type = int ()
so problem reversed somehow ;)
It sounds like somehow we get a unprototyped state thrown at dwarf2out.c
(even though there are prototypes in the header).
Note that debuginfo looks good but we have pruned one of the prototypes
from the t.c as unused. So gdb should probably show <optimized out>
rather than int (). That's analysis for 7.1 (make_natnum is not used in t.c),
not sure what goes wrong with earlier compilers. gdb should also be improved
(given make_natnum is global) to look into non-current CUs.
I reproduced with
(gdb) start
(gdb) ptype ...
debug info emitted from GCC 6 looks complete but still gdb somehow messes up.
So I start to belive this is a gdb bug.
>From gcc-bugs-return-562830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:20:53 2017
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I used gdb 7.12.1 btw.
>From gcc-bugs-return-562831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:27:51 2017
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Subject: [Bug tree-optimization/80652] [5 Regression] Union conversion between __m128d and double array does not work under 5.0 through 6.2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
CC| |rguenth at gcc dot gnu.org
Component|c++ |tree-optimization
Known to work| |4.9.4, 6.3.0
Summary|Union conversion between |[5 Regression] Union
|__m128d and double array |conversion between __m128d
|does not work under 5.0 |and double array does not
|through 6.2 |work under 5.0 through 6.2
Known to fail| |5.1.0, 5.4.0, 6.2.0
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably a pending/missing backport of a fix applied for GCC 6.3 so one could
bisect the GCC 6 branch for the fix.
>From gcc-bugs-return-562832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:28:06 2017
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Subject: [Bug tree-optimization/80652] [5 Regression] Union conversion between __m128d and double array does not work under 5.0 through 6.2
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What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
Target Milestone|--- |5.5
Ever confirmed|0 |1
>From gcc-bugs-return-562833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:32:47 2017
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Subject: [Bug tree-optimization/80655] -Werror=format-truncation inconsistency between x86_32 and x86_64
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
sprintf pass doesn't run close to VRP so the optimization opportunity could
have been exposed later.
>From gcc-bugs-return-562834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:35:29 2017
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Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |6.3.1
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-05-08
Component|c |sanitizer
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
Ever confirmed|0 |1
Summary|[7 regression] |[7/8 Regression]
|-fsanitize=address evokes |-fsanitize=address evokes
|ICE in in |ICE in in
|gimplify_switch_expr |gimplify_switch_expr
Target Milestone|--- |7.2
Known to fail| |7.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-562835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:36:58 2017
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Subject: [Bug c++/80660] Member function pointer optimization affected by incompatible virtual function
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
CC| |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that AFAIK we do not use 'final' for code generation yet.
>From gcc-bugs-return-562836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:53:57 2017
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Subject: [Bug c++/80660] Member function pointer optimization affected by incompatible virtual function
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--- Comment #2 from drepper.fsp+rhbz at gmail dot com <drepper.fsp+rhbz at gmail dot com> ---
final shouldn't be needed in this case. It's an object that is used, the type
is known.
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Subject: [Bug c++/80577] Avoid using adj in member function pointers
Date: Mon, 08 May 2017 08:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80577
--- Comment #2 from drepper.fsp+rhbz at gmail dot com <drepper.fsp+rhbz at gmail dot com> ---
final isn't necessary in this case. An object is used and the type is known.
>From gcc-bugs-return-562838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 08:56:02 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80577] Avoid using adj in member function pointers
Date: Mon, 08 May 2017 09:02:00 -0000
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--- Comment #3 from drepper.fsp+rhbz at gmail dot com <drepper.fsp+rhbz at gmail dot com> ---
(In reply to drepper.fsp+rhbz@gmail.com from comment #2)
> final isn't necessary in this case. An object is used and the type is known.
Ignore this comment, wrong bug.
>From gcc-bugs-return-562839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:02:55 2017
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From: "akrzemi1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80664] New: Destructor not called upon exception while initializing a vector
Date: Mon, 08 May 2017 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80664
Bug ID: 80664
Summary: Destructor not called upon exception while
initializing a vector
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: akrzemi1 at gmail dot com
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The following program logs calls to successful constructors and destructors of
class `R`. I expect the number of constructions to equal the number of
destructions. But when second construction fails, the destructor of the
previously fully created object is not called. This is becayse shared_ptr's
destructor is skipped! This happens when list-initializing a vector of
shared_ptr's:
```
#include <cstdio>
#include <memory>
#include <stdexcept>
#include <vector>
void acquire_resource() // emulates failure to acquire the second resource
{
static int resources_exhausted = 0;
if (resources_exhausted)
throw std::runtime_error("failed");
else
++resources_exhausted;
}
struct R
{
explicit R(int)
{
acquire_resource();
std::puts("create");
}
R(R const&) = delete; // no copying, no moving
~R() { std::puts("destroy"); }
};
int main()
{
try {
std::vector<std::shared_ptr<R>> v {
std::make_shared<R>(1), // created, but never destroyed
std::make_shared<R>(2) // creation fails for this one
};
}
catch (...) {}
}
```
I consider the bug serious as it undermines the trust in C++'s "RAII
philosophy".
>From gcc-bugs-return-562840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:03:12 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
Date: Mon, 08 May 2017 09:07:00 -0000
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--- Comment #1 from Andrzej Krzemienski <akrzemi1 at gmail dot com> ---
This happens on all C++11 GCC versions.
>From gcc-bugs-return-562841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:07:29 2017
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Subject: [Bug rtl-optimization/75964] insn combiner removes comparison after ABS
Date: Mon, 08 May 2017 09:31:00 -0000
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--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to rsandifo@gcc.gnu.org from comment #5)
> It doesn't look like it's a regression, but maybe we want to backport anyway?
Would be great. It's wrong code after all, and the fix appears to be low
intrusive and without side effects.
>From gcc-bugs-return-562842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:31:19 2017
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Subject: [Bug rtl-optimization/75964] insn combiner removes comparison after ABS
Date: Mon, 08 May 2017 09:33:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to rsandifo@gcc.gnu.org from comment #5)
> Fixed on trunk. It doesn't look like it's a regression, but maybe we want
> to backport anyway?
We usually backport wrong-code fixes to active branches if easily possible.
>From gcc-bugs-return-562843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:33:10 2017
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From: "abenkhadra at protonmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80665] New: dynamic cast on nullptr leads to segfault
Date: Mon, 08 May 2017 09:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80665
Bug ID: 80665
Summary: dynamic cast on nullptr leads to segfault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Dynamic casts on nullptr should return nullptr as per C++ Standard §5.2.7/4.
However, g++ v6.2 segfaults while executing a dynamic_cast wrapped in a
non-virtual method belonging to a parent class. The assumed bug is produced
only at optimization levels higher than -O0.
That is, the code snippet with the following flags doesn't produce the bug
g++ -std=c++11 -Wall -Wextra -Wpedantic -O0 main.cpp -o test
However, compiling it with the following flags does produce a segfault
g++ -std=c++11 -Wall -Wextra -Wpedantic -O2 main.cpp -o test
Note that the following code snippet works on clang v3.8 and g++ v5.4 without
problems.
Code snippet:
-------------
#include <iostream>
class Base{
public:
int foo;
template<typename T>
T* as()
{
return dynamic_cast<T*>(this);
}
virtual ~Base() = default;
};
class Derived: public Base {
public:
int bar;
};
int main(void) {
Derived* fst_ptr = nullptr;
std::cout << "g++ 6.2 segfaults executing next statement" << std::endl;
Derived* snd_ptr = fst_ptr->as<Derived>();
std::cout << "Other compilers segfault on last statement as expected" <<
std::endl;
return (*snd_ptr).foo;
}
Platform:
---------
Used the prepackaged binary of g++ v6.2 for Ubuntu 16.04.2
Compiler details:
--------------------
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
6.2.0-3ubuntu11~16.04' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-6 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.2.0 20160901 (Ubuntu 6.2.0-3ubuntu11~16.04)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-Wall' '-Wextra'
'-Wpedantic' '-O0' '-o' 'test' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE main.cpp -mtune=generic -march=x86-64 -std=c++11
-Wall -Wextra -Wpedantic -O0 -fpch-preprocess -fstack-protector-strong
-Wformat-security -o main.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/6"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/6/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/6
/usr/include/x86_64-linux-gnu/c++/6
/usr/include/c++/6/backward
/usr/lib/gcc/x86_64-linux-gnu/6/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/6/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-Wall' '-Wextra'
'-Wpedantic' '-O0' '-o' 'test' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -O0 -Wall -Wextra
-Wpedantic -std=c++11 -version -fstack-protector-strong -Wformat-security -o
main.s
GNU C++11 (Ubuntu 6.2.0-3ubuntu11~16.04) version 6.2.0 20160901
(x86_64-linux-gnu)
compiled by GNU C version 6.2.0 20160901, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (Ubuntu 6.2.0-3ubuntu11~16.04) version 6.2.0 20160901
(x86_64-linux-gnu)
compiled by GNU C version 6.2.0 20160901, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 23988a38771f71e4676d56931fe884f7
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-Wall' '-Wextra'
'-Wpedantic' '-O0' '-o' 'test' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
as -v --64 -o main.o main.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-Wall' '-Wextra'
'-Wpedantic' '-O0' '-o' 'test' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/6/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
-plugin-opt=-fresolution=main.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro -o test
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/6/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/6
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../.. main.o -lstdc++ -lm -lgcc_s -lgcc
-lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/6/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-Wall' '-Wextra'
'-Wpedantic' '-O0' '-o' 'test' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
>From gcc-bugs-return-562844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:39:00 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Mon, 08 May 2017 09:39:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Keith Thompson from comment #6)
> (I question the policy of implementing DRs that have not been approved
> by the committee. As I understand it, the existence of a DR merely means
> that *someone* thinks there's a defect in the standard. Many DRs are
> eventually rejected.)
No, many issues that get submitted are eventually rejected, and are closed as
NAD. If it has DR status it means it's been accepted by the committee.
(In reply to Keith Thompson from comment #8)
> That's a surprising interpretation of the word "amendment".
It's the normal Enmglish meaning of the word.
> Searching isocpp.org and other sites, I haven't found any official reference
> to an "amendment" to the C++ standard. The nearest thing I've found, which
> is referenced in the gcc documentation, is the 1995 amendment to the 1990
> ISO C standard, "ANSI/ISO/IEC 9899-1990/AM 1-1995". That's definitely not
> a DR. (The C and C++ standard committees use similar procedures.)
It's not an official ISO term, it's just English.
> Does g++ implement *all* DRs reported against C++11?
Reported? No, because not every issue reported is a DR.
Ideally we implement all issues with DR status. Some aren't implemented, but
that's usually just because it hasn't been done yet.
>From gcc-bugs-return-562845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:39:09 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
Date: Mon, 08 May 2017 09:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
Ever confirmed|0 |1
Known to fail| |4.8.5, 7.1.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
.original shows it:
;; Function int main() (null)
;; enabled by -tree-original
{
<<< Unknown tree: try_block
{
struct vector v;
struct vector v;
<<cleanup_point <<< Unknown tree: expr_stmt
std::vector<std::shared_ptr<R> >::vector (&v, TARGET_EXPR <D.39273,
{._M_array=(const struct shared_ptr *) &TARGET_EXPR <D.39271, {TARGET_EXPR
<D.38842, <<< Unknown tree: aggr_init_expr
4
make_shared
D.38842
(int &) &TARGET_EXPR <D.36803, 1> >>>>, TARGET_EXPR <D.38867, <<< Unknown
tree: aggr_init_expr
...
try
{
}
finally
{
std::vector<std::shared_ptr<R> >::~vector (&v);
}
}
<<< Unknown tree: handler
try
{
<<cleanup_point <<< Unknown tree: expr_stmt
(void) __cxa_begin_catch (__builtin_eh_pointer (0)) >>>>>;
}
finally
{
__cxa_end_catch ();
} >>> >>>;
}
eh, so the construction is not in the try block!
>From gcc-bugs-return-562846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:39:44 2017
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Subject: [Bug c++/80665] dynamic cast on nullptr leads to segfault
Date: Mon, 08 May 2017 09:46:00 -0000
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--- Comment #1 from abenkhadra <abenkhadra at protonmail dot com> ---
A small clarification: the segfault happens upon executing the produced binary
and not in g++ itself.
>From gcc-bugs-return-562847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:46:28 2017
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From: "kloedej at knmi dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80666] New: character length parameter fails if declaration order incorrect
Date: Mon, 08 May 2017 09:46:00 -0000
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Bug ID: 80666
Summary: character length parameter fails if declaration order
incorrect
Product: gcc
Version: 6.3.1
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For gfortran v.6.3.1 (on Fedora 25) I noticed that this example code:
subroutine test_arg_order(key,keylen)
implicit none
character*(keylen), intent(in) :: key
integer, intent(in) :: keylen
end subroutine test_arg_order
gives the error:
>gfortran -c test.F90
test.F90:3:13:
character*(keylen), intent(in) :: key
1
Error: Scalar INTEGER expression expected at (1)
test.F90:1:29:
subroutine test_arg_order(key,keylen)
1
Error: Symbol ‘key’ at (1) has no IMPLICIT type
>
But if the order of declarations of the parameters is reversed in the
subroutine definition (but for identical order in the parameter list) it works
as expected:
subroutine test_arg_order(key,keylen)
implicit none
integer, intent(in) :: keylen
character*(keylen), intent(in) :: key
end subroutine test_arg_order
>gfortran -c test.F90
>
i.e. no error in this case.
Both versions of the code still compiled without error on older gfortran 4.8.x
versions (redhat 7).
The same error message was triggered in the case reported for bug #68108, but
to me this seems a different use case.
>From gcc-bugs-return-562848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 09:46:32 2017
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Subject: [Bug middle-end/79665] gcc's signed (x*x)/200 is slower than clang's
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--- Comment #18 from tnfchris at gcc dot gnu.org ---
Author: tnfchris
Date: Mon May 8 09:45:46 2017
New Revision: 247734
URL: https://gcc.gnu.org/viewcvs?rev=247734&root=gcc&view=rev
Log:
2017-05-08 Tamar Christina <tamar.christina@arm.com>
PR middle-end/79665
* expr.c (expand_expr_real_2): Move TRUNC_MOD_EXPR, FLOOR_MOD_EXPR,
CEIL_MOD_EXPR, ROUND_MOD_EXPR cases.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/expr.c
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Subject: [Bug c++/80665] dynamic cast on nullptr leads to segfault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
'this' may never be NULL.
>From gcc-bugs-return-562850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 10:43:23 2017
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Subject: [Bug libstdc++/80662] libstdc++ basic_string casting oddity
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|jwakely.gcc at gmail dot com |ville at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There's no implicit cast, it's because my_stream{} is an rvalue, so uses the
overload for rvalue streams:
template <class charT, class traits, class T>
basic_ostream<charT, traits>&
operator<<(basic_ostream<charT, traits>&& os, const T& x);
This returns the base class (as all the standard operator<< overloads do).
The only difference between gcc 6 and 7 is that operator is constrained, as
required by https://wg21.link/lwg2534 and G++ selects the constrained overload
rather than the member my_stream::operator<< (maybe because it's more
specialized, not sure yet). Clang always selects the member function, whether
the other one is constrained or not. EDG incorrectly says there's an ambiguous
overload.
So I don't think this is a libstdc++ bug, the changes to the libstdc++ code are
correct and required for conformance. G++ seems to be choosing the wrong
overload.
Reduced:
namespace std
{
// <type_traits>
struct true_type { static constexpr bool value = true; };
struct false_type { static constexpr bool value = false; };
template<bool Cond, typename T = void> struct enable_if { using type = T; };
template<> struct enable_if<false> { };
template<typename T, typename U> struct is_same : false_type { };
template<typename T> struct is_same<T, T> : true_type { };
template<typename T> struct remove_reference { using type = T; };
template<typename T> struct remove_reference<T&> { using type = T; };
template<typename T> struct remove_reference<T&&> { using type = T; };
template<typename T> struct is_lvalue_reference : false_type { };
template<typename T> struct is_lvalue_reference<T&> : true_type { };
template<typename T> T declval();
template<typename...> using void_t = void;
template<bool C, typename If, typename Else>
struct conditional
{
using type = If;
};
template<typename If, typename Else>
struct conditional<false, If, Else>
{
using type = Else;
};
template<typename...> struct __and_;
template<typename T, typename U>
struct __and_<T, U>
: conditional<T::value, U, false_type>::type
{ };
template<typename T, typename U, typename V>
struct __and_<T, U, V>
: conditional<T::value, __and_<U, V>, false_type>::type
{ };
template<typename T>
struct __not_ : conditional<T::value, false_type, true_type>::type { };
// <utility>
template<typename T>
T&& forward(T& t) { return static_cast<T&&>(t); }
// <string>
template<typename C> struct char_traits { };
struct string
{
string(const char* s) : str(s) { }
const char* str;
};
// <ostream>
template<typename C, typename T = char_traits<C>>
struct basic_ostream
{
basic_ostream& operator<<(const char*)
{
return *this;
}
};
using ostream = basic_ostream<char>;
inline ostream
operator<<(ostream& os, const string& s)
{
os << s.str;
return os;
}
#ifndef UNCONSTRAINED
// GCC 7 code
template<typename _Tp>
struct __is_convertible_to_basic_ostream
{
template<typename _Ch, typename _Up>
static basic_ostream<_Ch, _Up>& __check(basic_ostream<_Ch, _Up>*);
static void __check(...);
public:
using ostream_type =
decltype(__check(declval<typename remove_reference<_Tp>::type*>()));
constexpr static bool value = !is_same<ostream_type, void>::value;
};
template<typename _Ostream, typename _Tp, typename = void>
struct __is_insertable : false_type {};
template<typename _Ostream, typename _Tp>
struct __is_insertable<_Ostream, _Tp,
void_t<decltype(declval<_Ostream&>()
<< declval<const _Tp&>())>>
: true_type {};
template<typename _Ostream, typename _Tp>
inline
typename enable_if<__and_<__not_<is_lvalue_reference<_Ostream>>,
__is_convertible_to_basic_ostream<_Ostream>,
__is_insertable<_Ostream&, const _Tp&>>::value,
typename __is_convertible_to_basic_ostream<
_Ostream>::ostream_type>::type
operator<<(_Ostream&& __os, const _Tp& __x)
{
__os << __x;
return __os;
}
#else
// GCC 6 code
template<typename _CharT, typename _Traits, typename _Tp>
inline basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
{
__os << __x;
return __os;
}
#endif
}
struct my_stream : public std::ostream {
template<typename T>
my_stream& operator<<(T&& value)
{
std::ostream::operator<<(std::forward<T>(value));
return *this;
}
};
int main()
{
my_stream& s = (my_stream{} << "hello world");
}
>From gcc-bugs-return-562851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 10:53:27 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
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--- Comment #3 from d25fe0be@ <d25fe0be at outlook dot com> ---
Is this related to PR 66139?
>From gcc-bugs-return-562852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 11:25:48 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
Date: Mon, 08 May 2017 11:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's the same bug.
*** This bug has been marked as a duplicate of bug 66139 ***
>From gcc-bugs-return-562853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 11:25:51 2017
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Mon, 08 May 2017 11:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |akrzemi1 at gmail dot com
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80664 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-562854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 11:35:56 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
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--- Comment #5 from Andrzej Krzemienski <akrzemi1 at gmail dot com> ---
Thank you for pointing this out. Can anything be done to fix this PR 66139? It
has status "NEW" but is in fact quite old. In the comments above, you have
provided some substantial analysis of the source of the problem. The duplicate
you refer to (PR 66139) does not contain any analysis. It seams to be
abandoned. It is not even "CONFIRMED".
>From gcc-bugs-return-562855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 11:53:21 2017
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Subject: [Bug libstdc++/80662] libstdc++ basic_string casting oddity
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Further reduced:
namespace std
{
// <string>
struct string
{
string(const char* s) : str(s) { }
const char* str;
};
// <ostream>
template<typename C>
struct basic_ostream
{
basic_ostream& operator<<(const char*)
{
return *this;
}
};
using ostream = basic_ostream<char>;
inline ostream
operator<<(ostream& os, const string& s)
{
os << s.str;
return os;
}
#ifndef UNCONSTRAINED
// GCC 7 code
template<typename _Tp>
struct __is_convertible_to_basic_ostream
{
template<typename _Ch>
static basic_ostream<_Ch>& __check(basic_ostream<_Ch>*);
static void __check(void*) = delete;
using ostream_type = decltype(__check((_Tp*)0));
};
template<typename _Tp>
struct __is_convertible_to_basic_ostream<_Tp&>
{
};
template<typename _Ostream, typename _Tp>
inline typename __is_convertible_to_basic_ostream<_Ostream>::ostream_type
operator<<(_Ostream&& __os, const _Tp& __x)
{
__os << __x;
return __os;
}
#else
// GCC 6 code
template<typename _CharT, typename _Traits, typename _Tp>
inline basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
{
__os << __x;
return __os;
}
#endif
}
struct my_stream : public std::ostream {
template<typename T>
my_stream& operator<<(T&& value)
{
std::ostream::operator<<(value);
return *this;
}
};
int main()
{
my_stream& s = (my_stream{} << "hello world");
}
>From gcc-bugs-return-562856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:01:14 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
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--- Comment #5 from Andrzej Krzemienski <akrzemi1 at gmail dot com> ---
What does this mean that the status of this bug report is "NEW"? It is 2 years
old. In GCC Bugzilla one can assign status "CONFIRMED" to bug reports. Why is
this one not confirmed? Was nobody able to confirm that this bug exists in GCC?
It really looks serious, as it undermines C++'s exception safety rules and
guarantees.
>From gcc-bugs-return-562857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:13:54 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Mon, 08 May 2017 12:16:00 -0000
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Andrzej Krzemienski from comment #5)
> What does this mean that the status of this bug report is "NEW"? It is 2
> years old. In GCC Bugzilla one can assign status "CONFIRMED" to bug reports.
> Why is this one not confirmed? Was nobody able to confirm that this bug
> exists in GCC?
>
> It really looks serious, as it undermines C++'s exception safety rules and
> guarantees.
Calm down. NEW means confirmed, otherwise it would be UNCONFIRMED.
Writing trollish blog posts won't get the bug fixed any sooner.
>From gcc-bugs-return-562858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:16:02 2017
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Mon, 08 May 2017 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66139
--- Comment #7 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
std::basic_string<...> is too large. Replace it with a dummy
default constructable and copyable class Foo. Then get GIMPLE:
_1 = &<retval>->a;
_2 = std::vector<Foo>::at (&strings, 0);
Foo::Foo (_1, _2);
_3 = &<retval>->b;
_4 = std::vector<Foo>::at (&strings, 2);
Foo::Foo (_3, _4);
return <retval>;
No exception handling code here.
>From gcc-bugs-return-562859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:21:05 2017
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Subject: [Bug c++/80662] libstdc++ basic_string casting oddity
Date: Mon, 08 May 2017 12:43:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|libstdc++ |c++
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And further:
namespace std
{
struct ostream
{
ostream& operator<<(const char*)
{
return *this;
}
};
#ifndef UNCONSTRAINED
// GCC 7 code
template<typename _Ostream, typename _Tp>
inline ostream&
operator<<(_Ostream&& __os, const _Tp&__x)
{
return __os;
}
#else
// GCC 6 code
template<typename _Tp>
inline ostream&
operator<<(ostream&& __os, const _Tp&)
{
return __os;
}
#endif
}
struct my_stream : public std::ostream {
template<typename T>
my_stream& operator<<(T&& value)
{
std::ostream::operator<<(value);
return *this;
}
};
int main()
{
my_stream& s = (my_stream{} << "hello world");
}
G++ chooses std::operator<<
Clang chooses my_stream::operator<<
EDG and VC++ say they're ambiguous.
Changing to component=c++, but I'm not convinced G++ is actually wrong here.
>From gcc-bugs-return-562860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:43:12 2017
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Subject: [Bug c++/80648] [DR903] Valid C++11 null pointer constant (1-1) is rejected
Date: Mon, 08 May 2017 12:50:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
The committee has recently started indicating explicitly whether a particular
DR is intended to apply to the existing standard or only to the next one; most
fall into the former category. We weren't doing that at the time of DR 903,
but it clearly is intended to resolve an issue introduced in C++11 with
constexpr, so I think it clearly should apply.
>From gcc-bugs-return-562861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:50:11 2017
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Subject: [Bug c++/80665] dynamic cast on nullptr leads to segfault
Date: Mon, 08 May 2017 12:54:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
To clarify Richard's statement in the following statement is undefined
Derived* snd_ptr = fst_ptr->as<Derived>();
When fst_ptr is a null pointer.
>From gcc-bugs-return-562862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 12:54:38 2017
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Subject: [Bug c++/80667] New: [c++1z] ice segfault on partial specialization with non-type template parameter
Date: Mon, 08 May 2017 13:13:00 -0000
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Bug ID: 80667
Summary: [c++1z] ice segfault on partial specialization with
non-type template parameter
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mathias at gaunard dot com
Target Milestone: ---
Building the following code with std=c++1z
#include <type_traits>
template<class T>
struct traits
{
static constexpr T const_min = 0;
};
template <typename T, typename>
class Impl;
template<typename T, T MaxValue>
struct Impl<T, std::integral_constant<T, MaxValue>>
{
};
template<typename T>
struct Impl<T, std::integral_constant<T, traits<T>::const_min>>
{
};
Impl<unsigned char, std::integral_constant<unsigned char, 0>> foo()
{
return {};
}
gives
test.cpp: In function ‘Impl<unsigned char, std::integral_constant<unsigned
char, 0> > foo()’:
test.cpp:22:67: internal compiler error: Segmentation fault
Impl<unsigned char, std::integral_constant<unsigned char, 0>> foo()
^
0xb118ef crash_signal
../../gcc-src/gcc/toplev.c:337
0x61b925 unify
../../gcc-src/gcc/cp/pt.c:20292
0x61c8d1 unify
../../gcc-src/gcc/cp/pt.c:20573
0x61c319 unify
../../gcc-src/gcc/cp/pt.c:20764
0x61c4d7 unify
../../gcc-src/gcc/cp/pt.c:20843
0x61c319 unify
../../gcc-src/gcc/cp/pt.c:20764
0x61d971 get_partial_spec_bindings
../../gcc-src/gcc/cp/pt.c:21561
0x61db83 more_specialized_partial_spec
../../gcc-src/gcc/cp/pt.c:21436
0x61ddd9 most_specialized_partial_spec
../../gcc-src/gcc/cp/pt.c:21856
0x62e66b instantiate_class_template_1
../../gcc-src/gcc/cp/pt.c:10230
0x62e66b instantiate_class_template(tree_node*)
../../gcc-src/gcc/cp/pt.c:10798
0x691e75 complete_type(tree_node*)
../../gcc-src/gcc/cp/typeck.c:133
0x5ecffc check_function_type
../../gcc-src/gcc/cp/decl.c:14662
0x5ecffc start_preparsed_function(tree_node*, tree_node*, int)
../../gcc-src/gcc/cp/decl.c:14883
0x6000f3 start_function(cp_decl_specifier_seq*, cp_declarator const*,
tree_node*)
../../gcc-src/gcc/cp/decl.c:15199
0x686c97 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc-src/gcc/cp/parser.c:26129
0x686c97 cp_parser_init_declarator
../../gcc-src/gcc/cp/parser.c:19159
0x68796d cp_parser_simple_declaration
../../gcc-src/gcc/cp/parser.c:12777
0x688575 cp_parser_block_declaration
../../gcc-src/gcc/cp/parser.c:12602
0x666ec4 cp_parser_declaration
../../gcc-src/gcc/cp/parser.c:12500
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.
Works fine without std=c++1z, alternatively a workaround is to add a cast in
the second partial specialization.
>From gcc-bugs-return-562863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:13:20 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 13:23:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-08
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Paysan from comment #0)
> This not very friendly blog entry contains a report of a memory leak in
> libstdc++ ("worst bug of my entire career"):
>
> https://www.zerotier.com/blog/2017-05-05-theleak.shtml
>
> Including a not very easy way to reproduce it (by installing their software
> and stress-testing it). Apparently he didn't file a bug report here.
No, and that blog post is full of incorrect statements like "libstdc++
"helpfully" adds its own memory allocator layer between you and the C library.
This one implements its own caching and pooling, and searching around the web
yields many examples of people complaining about it."
That's simply not true. In the default configuration of libstdc++,
std::allocator uses new/delete and which just call malloc/free. There's no
caching and pooling at all.
> Solution proposed there: link against jemalloc (it's under BSDL),
> performance goes up, memory consumption stays low, i.e. neither use glibc's
> "too slow" malloc() nor use libstdc++'s memory allocator (still slower than
> jemalloc).
No, that's not what it says:
"I dropped in jemalloc and ran the test. CPU usage dropped but otherwise this
had no effect."
i.e. jemalloc was not proposed as a solution.
> Due to #1, we don't even know how many people are affected by the bug.
What bug?
>From gcc-bugs-return-562864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:23:03 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 13:24:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The blog post links to an unofficial copy of the libstdc++ documentation from
2004, which would explain the bogus claims about libstdc++ allocation policies.
I'm going to close this, as I don't feel like wasting time on it. The ZeroTier
blog post is simply misinformed and misleading and has no useful information.
>From gcc-bugs-return-562865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:24:58 2017
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Subject: [Bug c++/80662] libstdc++ basic_string casting oddity
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced thanks to K-ballo:
extern "C" int puts(const char*);
template<typename C, typename T>
void operator<<(C&&, T const&) { puts("non-member"); }
struct my_stream {
template <typename T>
void operator<<(T&&) { puts("member"); }
};
int main()
{
my_stream{} << "hello world";
}
>From gcc-bugs-return-562866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:26:37 2017
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Subject: [Bug c++/80664] Destructor not called upon exception while initializing a vector
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
NEW doesn't mean it's recent, it means it's been confirmed. If it hadn't been
confirmed it would be UNCONFIRMED.
>From gcc-bugs-return-562867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:32:48 2017
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From: "bernd at net2o dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
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--- Comment #4 from Bernd Paysan <bernd at net2o dot de> ---
So we close that without having tried to reproduce it? I would have put it
into "needinfo" mode, and ask that blog poster to actually fill in the gaps,
like "which version of libstdc++", "did you use the default allocator" and
such. I lack the information to reproduce it, either.
If he doesn't want to cooperate, we can close it as "worksforme".
>From gcc-bugs-return-562868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:37:34 2017
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Subject: [Bug fortran/80668] New: wrong error message with -finit-derived
Date: Mon, 08 May 2017 13:41:00 -0000
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Bug ID: 80668
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Dear All
The following code is producing wrong error message with -finit-derived
thanks
v
MODULE pw_hfx
IMPLICIT NONE
TYPE :: dist_t
INTEGER :: TYPE,nblks_loc,nblks
INTEGER,DIMENSION(:),POINTER :: dist
END TYPE dist_t
CONTAINS
SUBROUTINE hfx_new()
TYPE(dist_t) :: dist
CALL release_dist(dist)
END SUBROUTINE hfx_new
SUBROUTINE release_dist(dist)
TYPE(dist_t) :: dist
END SUBROUTINE release_dist
END MODULE pw_hfx
gfortran-trunk -c -finit-derived -finit-integer=1234567890
-finit-logical=false -finit-real=snan pw_hfx.mod.F90
pw_hfx.mod.F90:5:41:
INTEGER,DIMENSION(:),POINTER :: dist
1
Error: The element in the structure constructor at (1), for pointer component
‘dist’ should be a POINTER or a TARGET
pw_hfx.mod.F90:5:41:
INTEGER,DIMENSION(:),POINTER :: dist
1
Error: Pointer initialization target at (1) must have the SAVE attribute
>From gcc-bugs-return-562869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 13:41:11 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Feel free to try to reproduce it or try to contact them. When we have a
reproducer, or even a valgrind report, then a bug report might be useful. Until
then it's not useful. "I read blog that said there's a bug" is not a bug
report.
>From gcc-bugs-return-562870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 14:03:24 2017
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Subject: [Bug middle-end/80669] New: [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
Date: Mon, 08 May 2017 14:04:00 -0000
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Bug ID: 80669
Summary: [8 Regression] Bad -Wstringop-overflow warnings for
stpncpy
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The following code (compiled with -Wall, on x86_64, trunk revision 247733)
produces a bogus warning (causing the glibc testsuite build to fail):
char buf[100];
void
f (void)
{
__builtin_stpncpy (buf, "foo", 4);
}
t.c: In function 'f':
t.c:5:3: warning: '__builtin_stpncpy' reading 4 bytes from a region of size 3
[-Wstringop-overflow=]
__builtin_stpncpy (buf, "foo", 4);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The region being read actually has four bytes, not three; it's NUL-terminated.
And since it's NUL-terminated, any size argument to stpncpy, up to the size of
the destination buffer, would be OK, just as with strncpy; it only makes sense
to diagnose a read buffer overrun for strncpy or stpncpy if the source buffer
has no NUL bytes and the size is too big for it. In any case, the same
warnings should be given for both strncpy and stpncpy, which means not warning
for this test case (just as a corresponding test with strncpy does not warn).
>From gcc-bugs-return-562871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 14:04:59 2017
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From: "ed at catmur dot co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80667] [c++1z] ice segfault on partial specialization with non-type template parameter
Date: Mon, 08 May 2017 14:06:00 -0000
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--- Comment #1 from Ed Catmur <ed at catmur dot co.uk> ---
note: the rationale for using std::integral_constant rather than a T non-type
argument is CWG 1315.
Clang rejects in -std=c++1z:
<source>:22:63: error: ambiguous partial specializations of 'Impl<unsigned
char, std::integral_constant<unsigned char, '\x00'> >'
Impl<unsigned char, std::integral_constant<unsigned char, 0>> foo()
^
<source>:13:8: note: partial specialization matches [with T = unsigned char,
MaxValue = '\x00']
struct Impl<T, std::integral_constant<T, MaxValue>>
^
<source>:18:8: note: partial specialization matches [with T = unsigned char]
struct Impl<T, std::integral_constant<T, traits<T>::const_min>>
^
1 error generated.
In -std=c++14 gcc and clang both accept, and agree on using the latter partial
specialization.
I'm not clear whether the code should be rejected in -std=c++1z, or why the
behavior of the compilers is any different. Performing the transformation in
temp.class.order, gcc rejects as ambiguous in -std=c++14, and ICEs in
-std=c++1z; clang rejects as ambiguous in -std=c++14, and selects the *former*
specialization in -std=c++1z.
>From gcc-bugs-return-562872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 14:06:10 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Using the default configuration GLIBCPP_FORCE_NEW has not made any difference
to std::allocator since 2005 when r106665 was committed, changing the default
back to the allocator based on new/delete.
So if GLIBCPP_FORCE_NEW made a difference then the blog post seems to be about
GCC 3.4 or something of that age, and a bug report about ancient history is
useless.
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Subject: [Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
CC| |msebor at gcc dot gnu.org
Version|7.0 |8.0
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-562874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 14:26:12 2017
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Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Mon, 08 May 2017 14:39:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80545
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The Fortran warnings will be suppressed once a fix for bug 80545 has been
implemented (and the warning enabled only for the C family of languages).
Unfortunately, the patch I submitted for it doesn't work quite the way it needs
to and I haven't yet found a way to make it do what I want.
That said, I'll look into the latent bug Richard mentions.
>From gcc-bugs-return-562875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 14:39:32 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 15:11:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #6)
> Using the default configuration GLIBCPP_FORCE_NEW has not made any
> difference to std::allocator since 2005 when r106665 was committed, changing
> the default back to the allocator based on new/delete.
In fact that's when the default allocator was switched to new_allocator, but
that used GLIBCXX_FORCE_NEW.
The older GLIBCPP_FORCE_NEW env var hasn't made a difference since r68958 in
2003.
>From gcc-bugs-return-562876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 15:11:48 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 15:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80658
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Paysan from comment #0)
> The documentation of mt_allocator is at least somewhat misleading:
>
> https://gcc.gnu.org/onlinedocs/libstdc++/manual/mt_allocator_impl.html
>
> "Notes about deallocation. This allocator does not explicitly release
> memory."
>
> Well, it does add freed memory to its freelists and reuse it. It's just not
> giving back unused memory to the OS.
I've made a tweak to that text which should clarify things.
>From gcc-bugs-return-562877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 15:23:55 2017
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Subject: [Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The bug is expand_builtin_stpncpy working too hard (and not entirely correctly)
to compute the size of the source sequence. It should leave it to the
check_sizes function which already does this work and does it right, like
strncpy does. Let me fix that today.
>From gcc-bugs-return-562878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 15:50:11 2017
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Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
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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> ---
Why do you think this a bug in gfortran?
The code compiles if you remove 'implicit none'. With it you have to define
'keylen' before using it, as in you second test.
>From gcc-bugs-return-562879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 15:59:11 2017
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Subject: [Bug c++/80670] New: Member specialization of alias declaration from different namespace
Date: Mon, 08 May 2017 16:10:00 -0000
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Bug ID: 80670
Summary: Member specialization of alias declaration from
different namespace
Product: gcc
Version: unknown
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Name aliases with using-declaration are not treated equivalently to
typedef-name. Please refer to:
http://stackoverflow.com/questions/43787462/member-specialization-of-alias-declaration-in-different-namespaces/43792468
for complete investigation.
>From gcc-bugs-return-562880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:10:03 2017
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Subject: [Bug fortran/80668] wrong error message with -finit-derived
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAICT this has been introduced with the option (r239489). The manual says
These options do not initialize
* allocatable arrays
* variables that appear in an EQUIVALENCE statement.
This should probably apply to POINTERS.
>From gcc-bugs-return-562881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:24:51 2017
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Subject: [Bug c++/80670] Member specialization of alias declaration from different namespace
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please read https://gcc.gnu.org/bugs/ and provide a testcase as requested.
>From gcc-bugs-return-562882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:39:38 2017
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Subject: [Bug target/80671] New: config/aarch64/cortex-a57-fma-steering.c:416: bad statement order ?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80671
Bug ID: 80671
Summary: config/aarch64/cortex-a57-fma-steering.c:416: bad
statement order ?
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
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trunk/gcc/config/aarch64/cortex-a57-fma-steering.c:416]: (error) Dereferencing
'other_forest' after it is deallocated / released
Source code is
delete other_forest;
this->m_nb_nodes += other_forest->m_nb_nodes;
Somewhat unwise to delete something then use it.
Maybe other way around would be better.
>From gcc-bugs-return-562883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:43:08 2017
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Subject: [Bug target/80672] New: gcc/config/sh/sh.c:716: prefer compare to find.
Date: Mon, 08 May 2017 16:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80672
Bug ID: 80672
Summary: gcc/config/sh/sh.c:716: prefer compare to find.
Product: gcc
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trunk/gcc/config/sh/sh.c:716]: (performance) Inefficient usage of
string::find() in condition; string::compare() would be faster.
Source code is
else if (tokens[i].find ("gbr-offset=") == 0)
>From gcc-bugs-return-562884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:46:19 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80624] char_traits<char16_t>::eof() doesn't meet requirements
Date: Mon, 08 May 2017 16:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80624
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Some more examples of misbehaviour caused by eof() being a valid character:
#include <sstream>
#include <cassert>
int main()
{
std::basic_ostringstream<char16_t> s;
s.put(u'\uFFFF');
assert( s.str().length() == 1 );
}
a.out: ex.cc:8: int main(): Assertion `s.str().length() == 1' failed.
Aborted (core dumped)
#include <sstream>
int main()
{
std::basic_ostringstream<char16_t> s(u"foo");
s.exceptions(std::ios_base::badbit);
s.put(u'\uFFFF');
}
terminate called after throwing an instance of 'std::ios_base::failure'
what(): basic_ios::clear
Aborted (core dumped)
#include <sstream>
#include <cassert>
int main()
{
const char16_t ffff = u'\uFFFF';
std::basic_istringstream<char16_t> s(u"\uFFFFoo");
s.exceptions(std::ios_base::eofbit);
assert( s.rdbuf()->in_avail() > 1 );
auto c = s.get();
}
terminate called after throwing an instance of 'std::ios_base::failure'
what(): basic_ios::clear
Aborted (core dumped)
>From gcc-bugs-return-562885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:48:54 2017
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Subject: =?UTF-8?B?W0J1ZyBib290c3RyYXAvODA2NzNdIE5ldzogc3BhcmN2OS1zb2xhcmlzMi4x?= =?UTF-8?B?MSBib290c3RyYXAgZXJyb3I6IGNhbm5vdCBjb252ZXJ0IOKAmGZvcm1hdF9z?= =?UTF-8?B?dGRfdmVyc2lvbiB7ZW51bX3igJkgdG8g4oCYY29uc3QgY2hhcirigJkgaW4g?= =?UTF-8?B?aW5pdGlhbGl6YXRpb24=?Date: Mon, 08 May 2017 16:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80673
Bug ID: 80673
Summary: sparcv9-solaris2.11 bootstrap error: cannot convert
‘format_std_version {enum}’ to ‘const char*’ in
initialization
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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A cross-build of the sparcv9-solaris2.11 target on a x86_64-linux host fails
with the following error and shows the warnings below.
/src/gcc/80280/gcc/config/sol2-c.c:46:1: error: cannot convert
‘format_std_version {enum}’ to ‘const char*’ in initialization
};
^
/src/gcc/80280/gcc/config/sol2-c.c:46:1: warning: missing initializer for
member ‘format_flag_spec::std’ [-Wmissing-field-initializers]
/src/gcc/80280/gcc/config/sol2-c.c:46:1: error: cannot convert
‘format_std_version {enum}’ to ‘const char*’ in initialization
/src/gcc/80280/gcc/config/sol2-c.c:46:1: warning: missing initializer for
member ‘format_flag_spec::std’ [-Wmissing-field-initializers]
/src/gcc/80280/gcc/config/sol2-c.c:46:1: error: cannot convert
‘format_std_version {enum}’ to ‘const char*’ in initialization
/src/gcc/80280/gcc/config/sol2-c.c:46:1: warning: missing initializer for
member ‘format_flag_spec::std’ [-Wmissing-field-initializers]
/src/gcc/80280/gcc/config/sol2-c.c: In function ‘void
solaris_pragma_align(cpp_reader*)’:
/src/gcc/80280/gcc/config/sol2-c.c:116:24: warning: ‘D’ conversion used
unquoted [-Wformat=]
"%D, ignoring", decl);
^
/src/gcc/80280/gcc/config/t-sol2:21: recipe for target 'sol2-c.o' failed
make[2]: *** [sol2-c.o] Error 1
>From gcc-bugs-return-562886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:50:42 2017
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Subject: [Bug target/80672] gcc/config/sh/sh.c:716: prefer compare to find.
Date: Mon, 08 May 2017 16:55:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Unrelated issue in the same file:
trunk/gcc/config/sh/sh.c:10817]: (style) Expression is always false because
'else if' condition matches previous condition at line 10803.
else if (scratch0 != scratch1)
{
else if (scratch0 != scratch1)
{
>From gcc-bugs-return-562887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 16:55:07 2017
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Subject: [Bug fortran/80674] New: trunk/gcc/fortran/trans-stmt.c:2578]: (style) Redundant condition
Date: Mon, 08 May 2017 17:10:00 -0000
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Bug ID: 80674
Summary: trunk/gcc/fortran/trans-stmt.c:2578]: (style)
Redundant condition
Product: gcc
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trunk/gcc/fortran/trans-stmt.c:2578]: (style) Redundant condition: cp->low. '!A
|| (A && B)' is equivalent to '!A || B'
Source code is
if (!cp->low
|| (cp->low
&& mpz_cmp (cp->low->value.integer,
cp->high->value.integer) != 0))
>From gcc-bugs-return-562888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 17:10:56 2017
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Subject: [Bug fortran/68600] Inlined MATMUL is too slow.
Date: Mon, 08 May 2017 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68600
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #15)
> I think that with the current status, where
> we have -finline-matmul-limit=30 by default, we
> can close this bug.
>
> Agreed?
Yes, this can be closed.
>From gcc-bugs-return-562889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 17:10:56 2017
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Subject: [Bug fortran/37131] inline matmul for small matrix sizes
Date: Mon, 08 May 2017 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37131
Bug 37131 depends on bug 68600, which changed state.
Bug 68600 Summary: Inlined MATMUL is too slow.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68600
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug libfortran/51119] MATMUL slow for large matrices
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51119
Bug 51119 depends on bug 68600, which changed state.
Bug 68600 Summary: Inlined MATMUL is too slow.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68600
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug libstdc++/80675] New: Incorrect implementation of LWG 2534
Date: Mon, 08 May 2017 17:26:00 -0000
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Bug ID: 80675
Summary: Incorrect implementation of LWG 2534
Product: gcc
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#include <ostream>
struct X { };
std::ostream& operator<<(std::ostream& os, const X&) { return os; }
struct O : std::ostream { };
void operator<<(O&, X) = delete;
int main()
{
O{} << X{};
}
This should compile, because the operator<<(basic_ostream<C,Tr>&&, const T&)
overload should be chosen by overload resolution.
However we implement the "os << t is valid" constrain using the wrong type, as
we do it on the derived type, not after conversion to basic_ostream<C,Tr>.
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Subject: [Bug fortran/80668] wrong error message with -finit-derived
Date: Mon, 08 May 2017 17:36:00 -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
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Subject: [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
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--- Comment #9 from R0b0t1 <r030t1 at gmail dot com> ---
Please fix. Per the documentation available `-fsantize=undefined` provides some
of the missing functionality but does not allow the program's flow to be
altered.
>From gcc-bugs-return-562894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 17:56:52 2017
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
Date: Mon, 08 May 2017 18:02:00 -0000
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Mon May 8 17:56:13 2017
New Revision: 247753
URL: https://gcc.gnu.org/viewcvs?rev=247753&root=gcc&view=rev
Log:
2017-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/80602
* m4/matmul_internal.m4: 'matmul_name`: Change
t1 to a VLA of the required size.
* generated/matmul_c10.c: Regenerated.
* generated/matmul_c16.c: Regenerated.
* generated/matmul_c4.c: Regenerated.
* generated/matmul_c8.c: Regenerated.
* generated/matmul_i1.c: Regenerated.
* generated/matmul_i16.c: Regenerated.
* generated/matmul_i2.c: Regenerated.
* generated/matmul_i4.c: Regenerated.
* generated/matmul_i8.c: Regenerated.
* generated/matmul_r10.c: Regenerated.
* generated/matmul_r16.c: Regenerated.
* generated/matmul_r4.c: Regenerated.
* generated/matmul_r8.c: Regenerated.
2017-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/80602
* gfortran.dg/matmul_15.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/matmul_15.f90
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/Makefile.in
trunk/libgfortran/generated/matmul_c10.c
trunk/libgfortran/generated/matmul_c16.c
trunk/libgfortran/generated/matmul_c4.c
trunk/libgfortran/generated/matmul_c8.c
trunk/libgfortran/generated/matmul_i1.c
trunk/libgfortran/generated/matmul_i16.c
trunk/libgfortran/generated/matmul_i2.c
trunk/libgfortran/generated/matmul_i4.c
trunk/libgfortran/generated/matmul_i8.c
trunk/libgfortran/generated/matmul_r10.c
trunk/libgfortran/generated/matmul_r16.c
trunk/libgfortran/generated/matmul_r4.c
trunk/libgfortran/generated/matmul_r8.c
trunk/libgfortran/m4/matmul_internal.m4
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80676] New: basic_stringbuf does not use initial capacity of SSO string
Date: Mon, 08 May 2017 18:09:00 -0000
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Bug ID: 80676
Summary: basic_stringbuf does not use initial capacity of SSO
string
Product: gcc
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The following prints "overflow":
#include <sstream>
#include <iostream>
struct SB : std::stringbuf
{
int_type overflow(int_type c) override
{
std::cout << "overflow\n";
return std::stringbuf::overflow(c);
}
};
int main()
{
SB sb;
std::ostringstream s;
s.std::ios::rdbuf(&sb);
s.put('a');
}
The call to the virtual function should not be necessary when using the new
ABI, because the SSO string has an initial non-zero capacity. The stringbuf
could use it.
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From: "helmut at subdivi dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80677] New: LIMITS_H_TEST is wrong
Date: Mon, 08 May 2017 18:12:00 -0000
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Bug ID: 80677
Summary: LIMITS_H_TEST is wrong
Product: gcc
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LIMITS_H_TEST is a Makefile variable defined in gcc/Makefile.in, that
determines how to generate its own limits.h, in particular whether to use
limitx.h and limity.h. The test simply tests whether
$(BUILD_SYSTEM_HEADER_DIR)/limits.h exists and for most practical purposes this
tests whether /usr/include/limits.h exists.
When the build and target architectures equal, this is fine. When they don't
bad things happen.
False positives: When building on a typical GNU/Linux system for a baremetal
target, the test indicates wrongly indicates success.
False negatives: Debian is about to further multiarch. That involves moving
libc headers from /usr/include to /usr/include/$(DEB_HOST_MULTIARCH) as libc
headers can differ for different libc implementations (glibc/musl/uclibc). Thus
the test will wrongly fail even for libcs that provide a limits.h.
It seems that the false positive is present since ages and nobody ever noticed.
Thus it probably is harmless.
The false negative generates a limits.h that disagrees on MB_LEN_MAX with glibc
and breaks builds. (# error "Assumed value of MB_LEN_MAX wrong" when including
<stdlib.h> after <limits.h>)
Thus I propose setting "LIMITS_H_TEST = :" (i.e. always assuming limits.h
presence) as an improved heuristic. I also tried invoking $(GCC_FOR_TARGET) -E
to check for limits.h presence, but since configure.ac overwrites the
GCC_FOR_TARGET defined in gcc/Makefile.in, the required -isystem flags are
missing and it has no chance of finding the header.
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/80646] [5/6/7 Regression] wrong type info for extern inline function when compiling Emacs
Date: Mon, 08 May 2017 18:23:00 -0000
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--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Richard Biener from comment #1)
> So I start to belive this is a gdb bug.
Thanks, I filed a GDB bug report here:
https://sourceware.org/bugzilla/show_bug.cgi?id=21473
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Subject: [Bug other/80678] New: g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80678
Bug ID: 80678
Summary: g++.dg/cpp1y/constexpr-79681-2.C fails with ICE
starting with r247678
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
The backported test g++.dg/cpp1y/constexpr-79681-2.C fails with an ICE on
powerpcle:
spawn /home/seurer/gcc/build/gcc-6/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/build/gcc-6/gcc/testsuite/g++/../../
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/seurer/gcc/build/gcc-6/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-6/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-6/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-6/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-6/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++14 -O2 -S -o constexpr-79681-2.s
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:20:
in constexpr expansion of 'foo()'
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
/home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:20:
in constexpr expansion of 'foo()'
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
/home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
FAIL: g++.dg/cpp1y/constexpr-79681-2.C -std=gnu++14 (internal compiler error)
FAIL: g++.dg/cpp1y/constexpr-79681-2.C -std=gnu++14 (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
/home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
/home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261
testcase /home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/dg.exp completed in 2
seconds
=== g++ Summary ===
# of unexpected failures 2
# of unsupported tests 2
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Subject: [Bug fortran/79930] Potentially Missed Optimisation for MATMUL / DOT_PRODUCT
Date: Mon, 08 May 2017 18:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79930
--- Comment #14 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Mon May 8 18:22:44 2017
New Revision: 247755
URL: https://gcc.gnu.org/viewcvs?rev=247755&root=gcc&view=rev
Log:
2017-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/79930
* frontend-passes.c (matmul_to_var_expr): New function,
add prototype.
(matmul_to_var_code): Likewise.
(optimize_namespace): Use them from gfc_code_walker.
2017-05-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/79930
* gfortran.dg/inline_transpose_1.f90: Add
-finline-matmul-limit=0 to options.
* gfortran.dg/matmul_5.f90: Likewise.
* gfortran.dg/vect/vect-8.f90: Likewise.
* gfortran.dg/inline_matmul_14.f90: New test.
* gfortran.dg/inline_matmul_15.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/inline_matmul_14.f90
trunk/gcc/testsuite/gfortran.dg/inline_matmul_15.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/inline_transpose_1.f90
trunk/gcc/testsuite/gfortran.dg/matmul_5.f90
trunk/gcc/testsuite/gfortran.dg/vect/vect-8.f90
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Subject: [Bug tree-optimization/80647] vectorized loop crashes from wrongly assuming 16 byte alignment
Date: Mon, 08 May 2017 19:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80647
--- Comment #2 from Yale Zhang <yzhang1985 at gmail dot com> ---
Very interesting case. First, I didn't know unaligned loads were undefined
behavior on x86.
ICC 17 doesn't vectorize the loop probably because the destination and source
of the memmove() alias.
But apparently GCC knows how to vectorize memmove(). In this function, the
destination always comes before the source, so it's trivial to vectorize.
Vectorizing the case where destination > source is harder, and I wonder if GCC
can do that.
This is some legacy code from > 10 years ago. Manually vectorizing the
memmove() was too smart for modern compilers.
But the solution is simple. I'll just use the other simple, fallback
implementation used on unknown platforms. It's still vectorizable though.
thanks Andrew.
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Subject: [Bug c++/80178] Class with deleted copy and move constructors uses wrong argument passing ABI
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon May 8 19:08:07 2017
New Revision: 247757
URL: https://gcc.gnu.org/viewcvs?rev=247757&root=gcc&view=rev
Log:
PR c++/80178 - parameter passing for uncopyable classes
* tree.c (type_has_nontrivial_copy_init): True for classes with only
deleted copy/move ctors.
(remember_deleted_copy, maybe_warn_parm_abi): New.
* decl.c (require_complete_types_for_parms, check_function_type):
Call maybe_warn_parm_abi.
* call.c (convert_for_arg_passing, build_cxx_call): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/abi/invisiref1.C
trunk/gcc/testsuite/g++.dg/abi/invisiref1a.C
Modified:
trunk/gcc/common.opt
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/tree.c
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Subject: [Bug libstdc++/80676] basic_stringbuf does not use initial capacity of SSO string
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80676
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The fix is trivial:
--- a/libstdc++-v3/include/std/sstream
+++ b/libstdc++-v3/include/std/sstream
@@ -99,7 +99,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
explicit
basic_stringbuf(ios_base::openmode __mode = ios_base::in |
ios_base::out)
: __streambuf_type(), _M_mode(__mode), _M_string()
- { }
+ {
+#if _GLIBCXX_USE_CXX11_ABI
+ _M_stringbuf_init(__mode);
+#endif
+ }
/**
* @brief Starts with an existing string buffer.
There was no point calling _M_stringbuf_init for the COW string, because
immediately after construction there was no buffer to use. With an SSO string
that isn't true.
>From gcc-bugs-return-562903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 20:47:59 2017
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From: "thomas.sanchz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80679] New: call of overloaded is ambiguous
Date: Mon, 08 May 2017 20:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80679
Bug ID: 80679
Summary: call of overloaded is ambiguous
Product: gcc
Version: unknown
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Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thomas.sanchz at gmail dot com
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Hi,
First reported there https://github.com/mapbox/jni.hpp/pull/17
The following code is compiling fine on clang but fails on g++
////
template <class T>
class Method {};
template <class R, class... Args>
void Call(const Method<R (Args...)>&, const Args&... args) {}
template <class... Args>
void Call(const Method<void (Args...)>&, const Args&... args) {}
int main() {
Call(Method<void (int)>(), int());
}
////
Cheers,
>From gcc-bugs-return-562904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 20:51:02 2017
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Mon, 08 May 2017 20:56:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon May 8 20:50:24 2017
New Revision: 247758
URL: https://gcc.gnu.org/viewcvs?rev=247758&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR translation/80280
* config/sol2-c.c (solaris_pragma_align): Correct quoting.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sol2-c.c
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Subject: [Bug c++/80679] call of overloaded is ambiguous
Date: Mon, 08 May 2017 21:04:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-08
Ever confirmed|0 |1
>From gcc-bugs-return-562906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 21:04:20 2017
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Subject: [Bug c/80428] Incorrect -Wunused-const-variable= instance
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Tom Rini <tom.rini at gmail dot com> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Tom Rini <tom.rini at gmail dot com> ---
OK, digging into this quite hard I found that indeed, during SPL builds for
U-Boot, the code in question (or rather, the functions that use it) are never
referenced, but only some times do we generate the warning, and in other times
we do not. In all cases (again, for U-Boot) we use
-fdata-sections/-ffunction-sections/--gc-sections and discard.
In sum, there is a bug here in that the compiler should have been issuing this
warning in a lot more cases, but I do not have the time / expertise to generate
a stand-alone testcase. As I was reporting this as a warning when it shouldn't
warn, but it turns out to be warning when it should be warning (and _not_
warning when it _should_ be warning), I'm movinv this to resolved/invalid.
>From gcc-bugs-return-562907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 21:04:22 2017
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Subject: [Bug target/69868] vec_perm built-in is not handled by swap optimization on powerpc64le
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon May 8 21:03:45 2017
New Revision: 247759
URL: https://gcc.gnu.org/viewcvs?rev=247759&root=gcc&view=rev
Log:
[gcc]
2016-05-08 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
PR target/69868 + swap optimization backports
* config/rs6000/rs6000.c (swap_web_entry): Enlarge
special_handling bitfield.
(special_handling_values): Add SH_XXPERMDI, SH_CONCAT, SH_VPERM,
and SH_VPERM_COMP.
(const_load_sequence_p): New.
(load_comp_mask_p): New.
(v2df_reduction_p): New.
(rtx_is_swappable_p): Perform special handling for XXPERMDI and
for reductions.
(insn_is_swappable_p): Perform special handling for VEC_CONCAT,
V2DF reductions, and various permutes.
(adjust_xxpermdi): New.
(adjust_concat): New.
(find_swapped_load_and_const_vector): New.
(replace_const_vector_in_load): New.
(adjust_vperm): New.
(adjust_vperm_comp): New.
(handle_special_swappables): Call adjust_xxpermdi, adjust_concat,
adjust_vperm, and adjust_vperm_comp.
(replace_swap_with_copy): Allow vector NOT operations to also be
replaced by copies.
(dump_swap_insn_table): Handle new special handling values.
[gcc/testsuite]
2016-05-08 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
PR target/69868 + swap optimization backports
* gcc.target/powerpc/swaps-p8-20.c: New.
* gcc.target/powerpc/swaps-p8-23.c: New.
* gcc.target/powerpc/swaps-p8-24.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-20.c
branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-23.c
branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-24.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/rs6000/rs6000.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-562908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 21:10:37 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79930] Potentially Missed Optimisation for MATMUL / DOT_PRODUCT
Date: Mon, 08 May 2017 21:31:00 -0000
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--- Comment #15 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I wonder if we should back port this as well since the bug can have a serious
performance hit without it. ?
>From gcc-bugs-return-562909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 21:31:36 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/80677] LIMITS_H_TEST is wrong
Date: Mon, 08 May 2017 22:10:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Mon, 8 May 2017, helmut at subdivi dot de wrote:
> False negatives: Debian is about to further multiarch. That involves moving
> libc headers from /usr/include to /usr/include/$(DEB_HOST_MULTIARCH) as libc
> headers can differ for different libc implementations (glibc/musl/uclibc). Thus
> the test will wrongly fail even for libcs that provide a limits.h.
Well, if headers move then configure (and related) tests that look at them
will need updating. See how gcc/configure.ac looks in $target_header_dir
to identify the glibc version and various other configuration, for
example.
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From: "zmahler at openmailbox dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80680] New: dead code elimination fails to remove unreferenced function
Date: Mon, 08 May 2017 22:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80680
Bug ID: 80680
Summary: dead code elimination fails to remove unreferenced
function
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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With the following code, gcc will produce code for yes() even though it is not
referenced anymore after optimization.
Less problematic but probably related is that the call to no() is surprisingly
not inlined,
and the size of the code in the optimized away branch seems to have an
influence on that.
#include <stdio.h>
static inline void yes(void) { puts("yes"); }
static inline void no(void) { puts("no"); }
static inline void test(int v)
{
if (v & 1) {
printf("%d%d%d%d%d%d%d%d%d%d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
(v ? yes : no)();
}
int main(void) { test(0); }
0000000000400430 <main>:
400430: 48 83 ec 08 sub rsp,0x8
400434: e8 07 01 00 00 call 400540 <no>
400439: 31 c0 xor eax,eax
40043b: 48 83 c4 08 add rsp,0x8
40043f: c3 ret
0000000000400540 <no>:
400540: bf e4 05 40 00 mov edi,0x4005e4
400545: e9 d6 fe ff ff jmp 400420 <puts@plt>
40054a: 66 0f 1f 44 00 00 nop WORD PTR [rax+rax*1+0x0]
0000000000400550 <yes>:
400550: bf e7 05 40 00 mov edi,0x4005e7
400555: e9 c6 fe ff ff jmp 400420 <puts@plt>
40055a: 66 0f 1f 44 00 00 nop WORD PTR [rax+rax*1+0x0]
$ gcc --version
gcc (SUSE Linux) 6.3.1 20170202 [gcc-6-branch revision 245119]
>From gcc-bugs-return-562911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 22:31:53 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 c++/80681] New: missing -Wuninitialized for const or reference member of a private base class
Date: Mon, 08 May 2017 22:35:00 -0000
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Bug ID: 80681
Summary: missing -Wuninitialized for const or reference member
of a private base class
Product: gcc
Version: 7.0
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G++ issues -Wuninitialized for uninitialized private const data or reference
members of classes with no constructors because there is no other way to
initialize them.
However, G++ neglects to issue the same warning when an uninitialized public
const data or reference member is defined in a base class that is privately
derived by a class without constructors, even though such a member also cannot
be initialized.
In addition, the C++ warning is not entirely correctly documented. The manual
states that:
In C++, warn if a non-static reference or non-static const member appears in
a class without constructors.
However, G++ only issues the warning when the member is inaccessible (private
or protected).
$ cat y.C && gcc -S -Wall -Wextra y.C
struct A1 { private: const int i; }; // warning, good
struct B1 { const int j; }; // no warning, good
struct C1: private B1 { }; // bug: missing warning
struct A2 { private: const int &i; }; // warning, good
struct B2 { const int &j; }; // no warning, good
struct C2: private B2 { }; // bug: missing warning
y.C:1:32: warning: non-static const member ‘const int A1::i’ in class without a
constructor [-Wuninitialized]
struct A1 { private: const int i; }; // warning, good
^
y.C:8:33: warning: non-static reference ‘const int& A2::i’ in class without a
constructor [-Wuninitialized]
struct A2 { private: const int &i; }; // warning, good
^
>From gcc-bugs-return-562912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 22:35:43 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 22:46:00 -0000
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--- Comment #9 from Bernd Paysan <bernd at net2o dot de> ---
(In reply to Jonathan Wakely from comment #2)
> "I dropped in jemalloc and ran the test. CPU usage dropped but otherwise
> this had no effect."
>
> i.e. jemalloc was not proposed as a solution.
That's the first attempt, before he discovered that there is another allocator
(likely mt_alloc) lurking inside, which he need to disable first (after a
coworker had enabled it somewhere in the source code):
"It turns out that there is a somewhat convoluted way to disable it globally:
set the environment variable "GLIBCPP_FORCE_NEW". After doing this, CPU use
increased slightly but memory use stabilized. Recalling jemalloc I now once
again tried sticking it under the controller in place of glibc's malloc and
both CPU load and memory use dropped to substantially less than either stock
configuration. More importantly everything became stable once again."
If the "GLIBCPP_FORCE_NEW" is not a typo, we can nail down the version he used
to somewhere at least 14 years old (because the environment variable is now
called GLIBCXX_FORCE_NEW).
>From gcc-bugs-return-562913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 22:46:16 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 23:20:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Paysan from comment #9)
> (In reply to Jonathan Wakely from comment #2)
> > "I dropped in jemalloc and ran the test. CPU usage dropped but otherwise
> > this had no effect."
> >
> > i.e. jemalloc was not proposed as a solution.
>
> That's the first attempt, before he discovered that there is another
> allocator (likely mt_alloc) lurking inside,
There is nothing "lurking inside", the author is deeply mistaken that anything
sits between operator new and the C library. The history of operator new can be
seen at
https://gcc.gnu.org/git/?p=gcc.git;a=history;f=libstdc%2B%2B-v3/libsupc%2B%2B/new_op.cc;h=1c19d4477668242eea1803b76e2638fbd699fe92;hb=HEAD
and has been largely unchanged since October 6, 2000.
> which he need to disable first
> (after a coworker had enabled it somewhere in the source code):
Where did you get that information? The blog post says nothing about a coworker
enabling mt_allocator, it strongly implies that the mt allocator pooling is on
by default and is why libstdc++ is "broken".
> "It turns out that there is a somewhat convoluted way to disable it
> globally: set the environment variable "GLIBCPP_FORCE_NEW". After doing
> this, CPU use increased slightly but memory use stabilized. Recalling
> jemalloc I now once again tried sticking it under the controller in place of
> glibc's malloc and both CPU load and memory use dropped to substantially
> less than either stock configuration. More importantly everything became
> stable once again."
Yes I was too busy facepalming by the time I got to the end to notice the
second reference to jemalloc.
> If the "GLIBCPP_FORCE_NEW" is not a typo, we can nail down the version he
> used to somewhere at least 14 years old (because the environment variable is
> now called GLIBCXX_FORCE_NEW).
Right, so unsupported and unmaintained. We're not interested in bug reports for
GCC 3.x or 4.x releases.
>From gcc-bugs-return-562914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 23:20:58 2017
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From: "bernd at net2o dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Mon, 08 May 2017 23:38:00 -0000
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--- Comment #11 from Bernd Paysan <bernd at net2o dot de> ---
(In reply to Jonathan Wakely from comment #10)
> > which he need to disable first
> > (after a coworker had enabled it somewhere in the source code):
>
> Where did you get that information? The blog post says nothing about a
> coworker enabling mt_allocator, it strongly implies that the mt allocator
> pooling is on by default and is why libstdc++ is "broken".
My guess. He mentions that he's not a lone wolf coder, and since he didn't
understand why mt_allocator was active, I guessed that a coworker had enabled
it ;-). There's no trace at all of ext/mt_allocator in the source code on
github, but in a crappy project, you never know if they build from the sources
they released to github.
However, with the CPP/CXX change of the environment variable: The minimal GCC
version that builds this project is GCC 4.9... or clang 3.9, which it prefers
to use on build if both gcc and clang are available. So it can't use a too old
libstdc++.
>From gcc-bugs-return-562915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 23:38:06 2017
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80682] New: __is_trivially_constructible(void, int) returns true.
Date: Mon, 08 May 2017 23:45:00 -0000
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Bug ID: 80682
Summary: __is_trivially_constructible(void, int) returns true.
Product: gcc
Version: 7.0.1
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Priority: P3
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Reproducer:
// g++ -std=c++11 -fsyntax-only
static_assert(!__is_trivially_constructible(void, int), "");
This seems blatantly incorrect.
>From gcc-bugs-return-562916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 08 23:45:50 2017
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From: "majerech.o at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80683] New: Exceptions don't propagate through default member initializer
Date: Tue, 09 May 2017 00:01:00 -0000
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Bug ID: 80683
Summary: Exceptions don't propagate through default member
initializer
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
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Testcase:
#include <iostream>
#include <stdexcept>
struct bar {
bar() {
throw std::runtime_error{"foo"};
}
};
struct foo {
bar b{};
};
int
main() try {
foo f;
} catch (std::runtime_error& e) {
std::cerr << e.what() << '\n';
}
Running this results in terminate being called:
terminate called after throwing an instance of 'std::runtime_error'
what(): foo
I would very much expect this code to work – i.e. the exception should be
caught in main. This code does work on Clang 3.9.1 and I couldn't find any
reason in the standard for why the exception shouldn't be allowed to propagate.
Stepping through the code in GDB reveals that after throwing, the call-stack
unwinds all the way to foo's constructor and goes to std::terminate from there,
as if foo::foo() were noexcept.
Changing foo to
struct foo {
bar b;
};
makes the bug go away. I.e. it only happens when a default member initializer
is used.
I've reproduced this on GCC 6.3.1 and GCC 8.0.0 20170507.
>From gcc-bugs-return-562917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 00:01:41 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Tue, 09 May 2017 00:04:00 -0000
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Paysan from comment #11)
> My guess. He mentions that he's not a lone wolf coder, and since he didn't
> understand why mt_allocator was active, I guessed that a coworker had
> enabled it ;-). There's no trace at all of ext/mt_allocator in the source
> code on github, but in a crappy project, you never know if they build from
> the sources they released to github.
Yeah I checked that too.
> However, with the CPP/CXX change of the environment variable: The minimal
> GCC version that builds this project is GCC 4.9... or clang 3.9, which it
> prefers to use on build if both gcc and clang are available. So it can't
> use a too old libstdc++.
In which case using GLIBCXX_FORCE_NEW means they are intentionally switching to
a custom allocator in production without testing if it works, and then blaming
libstdc++. Or they're linking to some 3rd party library build with an ancient
libstdc++. Or setting the env var was just voodoo and didn't change anything in
libstdc++.
So I still see nothing close to a useful bug report, and I've wasted several
hours that could have been spent fixing real bugs in the current codebase.
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Subject: [Bug rtl-optimization/80358] [7 Regression] ICE (cc1 killed) building glib with -O3 on powerpc64le-linux-gnu
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--- Comment #4 from acsawdey at gcc dot gnu.org ---
Author: acsawdey
Date: Tue May 9 00:03:35 2017
New Revision: 247772
URL: https://gcc.gnu.org/viewcvs?rev=247772&root=gcc&view=rev
Log:
2017-05-08 Aaron Sawdey <acsawdey@linux.vnet.ibm.com>
Backport from trunk
PR target/80358
* config/rs6000/rs6000.c (expand_block_compare): Fix boundary check.
Modified:
branches/ibm/gcc-6-branch/gcc/ChangeLog.ibm
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.c
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Subject: [Bug c++/68905] [DR496] __is_trivially_copyable returns True for volatile class types.
Date: Tue, 09 May 2017 00:29:00 -0000
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Eric Fiselier <eric at efcs dot ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Eric Fiselier <eric at efcs dot ca> ---
DR 496 has been superseded by DR2094 which requires the behavior GCC currently
has:
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#2094
Closing as INVALID.
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Subject: [Bug c++/80684] New: poor error message and fix-it hint for a function with an argument of undeclared type
Date: Tue, 09 May 2017 01:16:00 -0000
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Bug ID: 80684
Summary: poor error message and fix-it hint for a function with
an argument of undeclared type
Product: gcc
Version: 7.0
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Priority: P3
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G++ issues the following confusing error messages for a function declaration
involving the undeclared type string (where std::string from <string> was meant
but the header was not included). The suggested alternative only makes things
worse.
$ cat y.C && gcc -S -Wall -Wextra -Wpedantic y.C
void f (string);
y.C:1:15: error: variable or field ‘f’ declared void
void f (string);
^
y.C:1:9: error: ‘string’ was not declared in this scope
void f (string);
^~~~~~
y.C:1:9: note: suggested alternative: ‘struct’
void f (string);
^~~~~~
struct
In contrast, clang simply prints the much clearer:
y.C:1:9: error: unknown type name 'string'
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Subject: [Bug target/80101] ICE in store_data_bypass_p, at recog.c:3737
Date: Tue, 09 May 2017 01:21:00 -0000
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--- Comment #2 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Tue May 9 01:15:46 2017
New Revision: 247777
URL: https://gcc.gnu.org/viewcvs?rev=247777&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
2017-05-08 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/80101
* gcc.target/powerpc/pr80101-1.c: New test.
gcc/ChangeLog:
2017-05-08 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/80101
* config/rs6000/power6.md: Replace store_data_bypass_p calls with
rs6000_store_data_bypass_p in seven define_bypass directives and
in several comments.
* config/rs6000/rs6000-protos.h: Add prototype for
rs6000_store_data_bypass_p function.
* config/rs6000/rs6000.c (rs6000_store_data_bypass_p): New
function implements slightly different (rs6000-specific) semantics
than store_data_bypass_p, returning false rather than aborting
with assertion error when arguments do not satisfy the
requirements of store data bypass.
(rs6000_adjust_cost): Replace six calls of store_data_bypass_p with
rs6000_store_data_bypass_p.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr80101-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/power6.md
trunk/gcc/config/rs6000/rs6000-protos.h
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Tue, 09 May 2017 02:47:00 -0000
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--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
This appears to work in GCC 7. At least, I can see a crash when using GCC 6,
but I don't see a crash when using revision 246286. Which revision are you
using for the crash you see?
I'm afraid that I do not have the time to track down a failure in GCC 5 or 6 if
it is working on trunk.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Tue, 09 May 2017 02:48:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 9 02:47:14 2017
New Revision: 247778
URL: https://gcc.gnu.org/viewcvs?rev=247778&root=gcc&view=rev
Log:
PR translation/80280 - Missing closing quote (%>) c/semantics.c and
c/c-typeck.c
gcc/c-family/ChangeLog:
PR translation/80280
* c-format.h (struct format_flag_spec): Add new member.
(T89_T): New macro.
* c-format.c (local_tree_type_node): New global.
(printf_flag_specs, asm_fprintf_flag_spec): Initialize new data.
(gcc_diag_flag_specs, scanf_flag_specs, strftime_flag_specs): Ditto.
(strfmon_flag_specs): Likewise.
(gcc_diag_char_table, gcc_cdiag_char_table): Split up specifiers
with distinct quoting properties.
(gcc_tdiag_char_table, gcc_cxxdiag_char_table): Same.
(flag_chars_t::validate): Add argument and handle bad quoting.
(check_format_info_main): Handle quoting problems.
(init_dynamic_diag_info): Simplify.
gcc/testsuite/ChangeLog:
PR translation/80280
* gcc.dg/format/gcc_diag-10.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/format/gcc_diag-10.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-format.c
trunk/gcc/c-family/c-format.h
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Tue, 09 May 2017 03:17:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed and enhanced -Wformat implementation committed 247778.
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Subject: [Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
Date: Tue, 09 May 2017 04:01:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00575.html
>From gcc-bugs-return-562926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 04:01:59 2017
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From: "helmut at subdivi dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80677] LIMITS_H_TEST is wrong
Date: Tue, 09 May 2017 04:11:00 -0000
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--- Comment #2 from Helmut Grohne <helmut at subdivi dot de> ---
(In reply to joseph@codesourcery.com from comment #1)
> Well, if headers move then configure (and related) tests that look at them
> will need updating. See how gcc/configure.ac looks in $target_header_dir
> to identify the glibc version and various other configuration, for
> example.
As far as I understand it, gcc's build system takes care to consult
$(build_tooldir)/sys-include. Debian's packaging of gcc takes care to populate
it reasonably.
I have performed a fair number of builds of gcc with glibc's headers moved now
and cannot confirm the projected behavior. At present, it looks like fixing
LIMITS_H_TEST is the remaining piece to the puzzle.
>From gcc-bugs-return-562927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 04:11:35 2017
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From: "coypu at sdf dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80685] New: -Wnonnull-compare warns based on builtin declaration
Date: Tue, 09 May 2017 04:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80685
Bug ID: 80685
Summary: -Wnonnull-compare warns based on builtin declaration
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Assignee: unassigned at gcc dot gnu.org
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Hi, I'm building a libc.
It doesn't use __attribute__((nonnull)) anywhere in stdio.h and other headers,
instead asserts in a convoluted way that the arguments aren't NULL.
Building with gcc -Werror -Wall etc. I get lots of warnings about these NULL
checks:
/usr/src/lib/libc/../../common/lib/libc/string/strncat.c: In function
'strncat':
/usr/src/lib/libc/../../common/lib/libc/string/strncat.c:63:2: error: nonnull
argument 'dst' compared to NULL [-Werror=nonnull-compare]
_DIAGASSERT(dst != NULL);
^
I believe that warning may be bogus, feel free to close if you disagree.
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Subject: [Bug c/80685] -Wnonnull-compare warns based on builtin declaration
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The c standard says null pointer for strncat is undefined.
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Subject: [Bug c/80685] -Wnonnull-compare warns based on builtin declaration
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Use -fno-builtins if you don't want gcc to assumes things about functions.
>From gcc-bugs-return-562930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 06:51:56 2017
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Subject: [Bug other/80678] g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678
Date: Tue, 09 May 2017 06:52:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It doesn't fail on x86_64/i686 where I've tested it.
Seems this is because r237426 has not been backported (and neither earlier
r237319). Richard, do we want to backport those? Aren't those wrong-code
fixes (besides also fixing this ICE)?
>From gcc-bugs-return-562931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 06:52:45 2017
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Subject: [Bug other/80678] g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678
Date: Tue, 09 May 2017 07:36:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also, note the testcase has been ICEing even with older 6.x branch snapshots,
it is just that the testcase has been newly added.
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Subject: [Bug testsuite/80678] [6 Regression] g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Component|other |testsuite
Target Milestone|--- |6.4
Summary|g++.dg/cpp1y/constexpr-7968 |[6 Regression]
|1-2.C fails with ICE |g++.dg/cpp1y/constexpr-7968
|starting with r247678 |1-2.C fails with ICE
| |starting with r247678
>From gcc-bugs-return-562933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 07:57:10 2017
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Subject: [Bug ipa/80680] dead code elimination fails to remove unreferenced function
Date: Tue, 09 May 2017 08:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
CC| |hubicka at gcc dot gnu.org
Component|tree-optimization |ipa
Version|6.3.1 |7.1.1
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. IPA-CP / inlining fail to optimize the indirect call and thus the
node is not removed. So after inlining we have
<bb 4> [100.00%]:
# iftmp.0_4 = PHI <no(2), no(3)>
iftmp.0_4 ();
that _could_ have been simplified by IPA-CP / devirt?
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Subject: [Bug target/80687] New: VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
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Bug ID: 80687
Summary: VLA usage in libgfortran; nvptx target: "sorry,
unimplemented: target cannot support alloca"
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: bernds at gcc dot gnu.org, tkoenig at gcc dot gnu.org
Depends on: 65181
Target Milestone: ---
Target: nvptx
After the r247753 (Git 65a1b327b171135d6b591a7b63ef444de27dd600) commit for
PR80602:
[...]/libgfortran/generated/matmul_i1.c: In function 'matmul_i1':
[...]/libgfortran/generated/matmul_i1.c:2583:21: sorry, unimplemented:
target cannot support alloca.
GFC_INTEGER_1 t1[t1_dim]; /* was [256][256] */
^~
Makefile:3727: recipe for target 'matmul_i1.lo' failed
make[3]: *** [matmul_i1.lo] Error 1
Etc.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181
[Bug 65181] Support for alloca in nvptx
>From gcc-bugs-return-562935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:16:21 2017
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Subject: [Bug middle-end/77709] specified destination size warning does not work when cross-compiling from 64 host to 32bit target
Date: Tue, 09 May 2017 08:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77709
--- Comment #2 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Ping?
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/53896] nonreturning function suggested as 'pure' candidate
Date: Tue, 09 May 2017 08:20:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |ASSIGNED
Resolution|WONTFIX |---
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, I'll prepare a documentation fix for that.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Tue, 09 May 2017 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80643
Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|FIXED |---
Ever confirmed|1 |0
--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Hi Martin,
(In reply to Martin Sebor from comment #3)
> The failures should be fixed in r247652
> (https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00443.html).
I'm still seeing:
FAIL: c-c++-common/Wsizeof-pointer-memaccess2.c -Wc++-compat (test for excess
errors)
Excess errors:
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 0
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:11:30: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c:12:31: warning:
'__builtin_memcpy' reading 4 bytes from a region of size 1
[-Wstringop-overflow=]
>From gcc-bugs-return-562938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:35:13 2017
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Subject: [Bug target/80671] config/aarch64/cortex-a57-fma-steering.c:416: bad statement order ?
Date: Tue, 09 May 2017 08:42:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Agreed, that looks buggy
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80686] New: VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
Date: Tue, 09 May 2017 08:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80686
Bug ID: 80686
Summary: VLA usage in libgfortran; nvptx target: "sorry,
unimplemented: target cannot support alloca"
Product: gcc
Version: 8.0
Status: RESOLVED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: bernds at gcc dot gnu.org, tkoenig at gcc dot gnu.org
Depends on: 65181
Target Milestone: ---
Target: nvptx
Status: RESOLVED
Resolution: DUPLICATE
After the r247753 (Git 65a1b327b171135d6b591a7b63ef444de27dd600) commit for
PR80602:
[...]/libgfortran/generated/matmul_i1.c: In function 'matmul_i1':
[...]/libgfortran/generated/matmul_i1.c:2583:21: sorry, unimplemented:
target cannot support alloca.
GFC_INTEGER_1 t1[t1_dim]; /* was [256][256] */
^~
Makefile:3727: recipe for target 'matmul_i1.lo' failed
make[3]: *** [matmul_i1.lo] Error 1
Etc.
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Ran into a "gateway timeout" (?) (lost the precise error message) when filing
this one; it never made it to <https://gcc.gnu.org/ml/gcc-bugs/2017-05/>.
Retrying, I again got that error, but PR80687 got filed, and is visible on
<https://gcc.gnu.org/ml/gcc-bugs/2017-05/msg00783.html>.
*** This bug has been marked as a duplicate of bug 80687 ***
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181
[Bug 65181] Support for alloca in nvptx
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Subject: [Bug target/80687] VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
Date: Tue, 09 May 2017 08:47:00 -0000
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
*** Bug 80686 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-05/msg00306.ht
| |ml
Version|7.0.1 |8.0
--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80622] [8 Regression] wrong code at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And I even meant to mark as fixed.
>From gcc-bugs-return-562943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:49:14 2017
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Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
Date: Tue, 09 May 2017 08:50:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-562944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:50:50 2017
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Subject: [Bug target/80687] [8 Regression] VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
Date: Tue, 09 May 2017 08:51:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-09
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|VLA usage in libgfortran; |[8 Regression] VLA usage in
|nvptx target: "sorry, |libgfortran; nvptx target:
|unimplemented: target |"sorry, unimplemented:
|cannot support alloca" |target cannot support
| |alloca"
Ever confirmed|0 |1
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
So we need to make this patch conditional on
the compiler supporting VLAs.
Otherwise, I think we should just go for malloc/free
(to reduce the stack usage anyway). Or would this also
be problematic on nvptx?
I'll look at this tonight.
>From gcc-bugs-return-562945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:51:08 2017
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-562946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:54:27 2017
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Tue, 09 May 2017 08:56:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #4)
> This appears to work in GCC 7. At least, I can see a crash when using GCC
> 6, but I don't see a crash when using revision 246286. Which revision are
> you using for the crash you see?
>
> I'm afraid that I do not have the time to track down a failure in GCC 5 or 6
> if it is working on trunk.
I can reproduce it with current trunk revision r247781. It's a checking assert,
so that's maybe reason why you can't see it. I have to install the compiler and
invoke:
$ gcc bytes_decl.go bytes.go -flto -o a.out
>From gcc-bugs-return-562947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 08:56:29 2017
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Subject: [Bug c/80653] Enhancement: better location info for -Wunsafe-loop-optimizations
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
CC| |dmalcolm 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, I have the same experience with usage of location for gimple
statements. Adding David Malcolm.
>From gcc-bugs-return-562948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 09:01:07 2017
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Subject: [Bug fortran/80657] [7/8 Regression] Loop in character function declaration
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org,
| |pault at gcc dot gnu.org
Summary|Loop in character function |[7/8 Regression] Loop in
|declaration |character function
| |declaration
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r243478.
>From gcc-bugs-return-562949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 09:02:44 2017
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Subject: [Bug ipa/80663] signed integer overflow in ipa-split.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I'll fix that.
>From gcc-bugs-return-562950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 09:32:51 2017
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Subject: [Bug target/80582] Missing intrinsics _mm256_set_m128*
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Yulia Koval <julia.koval at intel dot com> changed:
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--- Comment #1 from Yulia Koval <julia.koval at intel dot com> ---
Patch posted at https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00611.html
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Subject: [Bug target/80689] New: 128 loads generated for structure copying with gcc 7.10 and leads to STLF stalls in avx2 targets.
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Bug ID: 80689
Summary: 128 loads generated for structure copying with gcc
7.10 and leads to STLF stalls in avx2 targets.
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: venkataramanan.kumar at amd dot com
Target Milestone: ---
For the below test case, GCC 7.1.0 started generating 128 bit loads and stores
while copying the structure elements.
This pattern is observed in some benchmarks and leads to STLF stalls for few
AVX2 targets.
typedef struct st1
{
long unsigned int a,b;
long int c,d;
}R;
typedef struct st2
{
int t;
R reg;
}N;
void Set (const R *region, N *n_info );
void test(N *n_obj ,const long unsigned int a, const long unsigned int b,
const long int c,const long int d)
{
R reg;
reg.a=a;
reg.b=b;
reg.c=c;
reg.d=d;
Set (®, n_obj);
}
void Set (const R *reg, N *n_obj )
{
n_obj->reg=(*reg);
}
flag: -fno-inline -O2
GCC 6.3.0
Set:
.LFB1:
.cfi_startproc
movq (%rdi), %rax
movq %rax, 8(%rsi)
movq 8(%rdi), %rax
movq %rax, 16(%rsi)
movq 16(%rdi), %rax
movq %rax, 24(%rsi)
movq 24(%rdi), %rax
movq %rax, 32(%rsi)
ret
.cfi_endproc
.LFE1:
.size Set, .-Set
.p2align 4,,15
.globl test
.type test, @function
test:
.LFB0:
.cfi_startproc
subq $40, %rsp
.cfi_def_cfa_offset 48
movq %rsi, (%rsp)
movq %rdi, %rsi
movq %rsp, %rdi
movq %rdx, 8(%rsp)
movq %rcx, 16(%rsp)
movq %r8, 24(%rsp)
call Set
addq $40, %rsp
.cfi_def_cfa_offset 8
ret
GCC 7.1.0
Set:
.LFB1:
.cfi_startproc
movdqu (%rdi), %xmm0 <== 128 bit loads
movups %xmm0, 8(%rsi)
movdqu 16(%rdi), %xmm0 <== 128 bit loads
movups %xmm0, 24(%rsi)
ret
.cfi_endproc
.LFE1:
.size Set, .-Set
.p2align 4,,15
.globl test
.type test, @function
test:
.LFB0:
.cfi_startproc
subq $40, %rsp
.cfi_def_cfa_offset 48
movq %rsi, (%rsp)
movq %rdi, %rsi
movq %rsp, %rdi
movq %rdx, 8(%rsp)
movq %rcx, 16(%rsp)
movq %r8, 24(%rsp)
call Set
addq $40, %rsp
.cfi_def_cfa_offset 8
ret
>From gcc-bugs-return-562952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:02:33 2017
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
Date: Tue, 09 May 2017 10:03:00 -0000
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Alexander Ivchenko <aivchenk at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aivchenk at gmail dot com
--- Comment #20 from Alexander Ivchenko <aivchenk at gmail dot com> ---
Not sure whether it is connected, but when I bootstrap with:
>../gcc_ref/configure --with-system-zlib --with-demangler-in-ld --with-arch=corei7 --with-cpu=corei7 --with-fpmath=sse --enable-shared --enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl --enable-languages=c --enable-libmpx=yes --with-build-config=bootstrap-lto
>make
In function ‘rtvec_alloc’,
inlined from ‘copy_rtx_for_iterators’ at
../../gcc_ref/gcc/read-rtl.c:448:32:
../../gcc_ref/gcc/rtl.c:155:10: error: ‘memset’: specified size
18446744073709551608 exceeds maximum object size 9223372036854775807
[-Werror=stringop-overflow=]
memset (&rt->elem[0], 0, n * sizeof (rtx));
>From gcc-bugs-return-562953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:03:57 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80687] [8 Regression] VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
Date: Tue, 09 May 2017 10:14:00 -0000
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--- Comment #3 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #2)
> So we need to make this patch conditional on
> the compiler supporting VLAs.
ACK.
> Otherwise, I think we should just go for malloc/free
> (to reduce the stack usage anyway). Or would this also
> be problematic on nvptx?
As malloc/free are supported on nvptx, falling back to these will resolve the
compilation problem. And it will then be our problem ;-) to get the
performance right. (As necessary; PR65181 or something else -- curious if
there are optimization possibilities, when the size of the memory region can
actually be determined during compilation (?), can the compiler move this into
an sufficiently-sized PTX ".local" region, avoiding the malloc/free calls?)
> I'll look at this tonight.
Thanks! I'll be available for testing any patches.
>From gcc-bugs-return-562954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:14:44 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 10:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Target| |x86_64-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
That you use noinline tells that glibc memcpy has the very same issue. Note
that similarly having bytes/shorts in the structure and using longs or ints
to implement inlined memcpy has the same issue.
So I don't see how to easily fix this, or rather I don't think we can fix it at
all apart from the case where we can see both the struct copy and previous
stores to the source (thus when you enable inlining).
>From gcc-bugs-return-562955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:26:55 2017
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Subject: [Bug libstdc++/80690] New: [7/8 Regression] clang rejects std::thread with -std=c++1z
Date: Tue, 09 May 2017 10:27:00 -0000
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Bug ID: 80690
Summary: [7/8 Regression] clang rejects std::thread with
-std=c++1z
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markus@x4 /tmp % cat thread.cpp
#include <thread>
static void f() {}
int main() { std::thread t(f); }
markus@x4 /tmp % g++ -std=gnu++1z -pthread thread.cpp
markus@x4 /tmp % clang++ -std=c++14 -pthread thread.cpp
markus@x4 /tmp % clang++ -std=c++1z -pthread thread.cpp
In file included from thread.cpp:1:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:39:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/memory:80:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/bits/unique_ptr.h:37:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:165:13: error: data
member instantiated with function type 'void ()'
_Head _M_head_impl;
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:344:15: note: in
instantiation of template class 'std::_Head_base<0, void (), false>' requested
here
: private _Head_base<_Idx, _Head>
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:556:26: note: in
instantiation of template class 'std::_Tuple_impl<0, void ()>' requested here
class tuple : public _Tuple_impl<0, _Elements...>
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:223:9: note: in
instantiation of template class 'std::tuple<void ()>' requested here
_Tuple _M_t;
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:127:8: note: in
instantiation of template class 'std::thread::_Invoker<std::tuple<void ()> >'
requested here
__make_invoker(std::forward<_Callable>(__f),
^
thread.cpp:3:26: note: in instantiation of function template specialization
'std::thread::thread<void (&)()>' requested here
int main() { std::thread t(f); }
^
In file included from thread.cpp:1:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:39:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/memory:80:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/bits/unique_ptr.h:37:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:1452:14: error: no
matching conversion for functional-style cast from 'void ()' to '__result_type'
(aka 'tuple<void ()>')
return __result_type(std::forward<_Elements>(__args)...);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:259:11: note: in
instantiation of function template specialization 'std::make_tuple<void (&)()>'
requested here
std::make_tuple(std::forward<_Callable>(__callable),
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/thread:127:8: note: in
instantiation of function template specialization
'std::thread::__make_invoker<void (&)()>' requested
here
__make_invoker(std::forward<_Callable>(__f),
^
thread.cpp:3:26: note: in instantiation of function template specialization
'std::thread::thread<void (&)()>' requested here
int main() { std::thread t(f); }
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:660:17: note:
candidate constructor not viable: no known conversion from 'void ()' to 'const
std::tuple<void ()>' for
1st argument
constexpr tuple(const tuple&) = default;
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:662:17: note:
candidate constructor not viable: no known conversion from 'void ()' to
'std::tuple<void ()>' for 1st
argument
constexpr tuple(tuple&&) = default;
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:602:18: note:
candidate template ignored: disabled by 'enable_if' [with _Dummy = void]
_TCC<_Dummy>::template
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:613:18: note:
candidate template ignored: disabled by 'enable_if' [with _Dummy = void]
_TCC<_Dummy>::template
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:640:5: note:
candidate template ignored: disabled by 'enable_if' [with _UElements = <void
(&)()>]
_TMC<_UElements...>::template
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:651:5: note:
candidate template ignored: disabled by 'enable_if' [with _UElements = <void
(&)()>]
_TMC<_UElements...>::template
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:678:19: note:
candidate template ignored: could not match 'tuple<type-parameter-0-0...>'
against 'void ()'
constexpr tuple(const tuple<_UElements...>& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:690:28: note:
candidate template ignored: could not match 'tuple<type-parameter-0-0...>'
against 'void ()'
explicit constexpr tuple(const tuple<_UElements...>& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:702:19: note:
candidate template ignored: could not match 'tuple<type-parameter-0-0...>'
against 'void ()'
constexpr tuple(tuple<_UElements...>&& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:713:28: note:
candidate template ignored: could not match 'tuple<type-parameter-0-0...>'
against 'void ()'
explicit constexpr tuple(tuple<_UElements...>&& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:719:2: note:
candidate constructor template not viable: requires 2 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:729:2: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:740:11: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
explicit tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:750:2: note:
candidate constructor template not viable: requires at least 2 arguments, but 1
was provided
tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:761:11: note:
candidate constructor template not viable: requires at least 2 arguments, but 1
was provided
explicit tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:767:2: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:771:2: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:783:2: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:798:11: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
explicit tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:813:2: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:581:17: note:
candidate constructor template not viable: requires 0 arguments, but 1 was
provided
constexpr tuple()
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:828:11: note:
candidate constructor template not viable: requires 3 arguments, but 1 was
provided
explicit tuple(allocator_arg_t __tag, const _Alloc& __a,
^
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include/g++-v7/tuple:591:26: note:
candidate constructor template not viable: requires 0 arguments, but 1 was
provided
explicit constexpr tuple()
^
2 errors generated.
>From gcc-bugs-return-562956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:27:33 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 10:37:00 -0000
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--- Comment #2 from Venkataramanan <venkataramanan.kumar at amd dot com> ---
(In reply to Richard Biener from comment #1)
> That you use noinline tells that glibc memcpy has the very same issue. Note
> that similarly having bytes/shorts in the structure and using longs or ints
> to implement inlined memcpy has the same issue.
>
> So I don't see how to easily fix this, or rather I don't think we can fix it
> at all apart from the case where we can see both the struct copy and previous
> stores to the source (thus when you enable inlining).
Actual benchmark from where I made the small test case is compiled with in
lining enabled.
Just to show at the calling place "test" function, all stores happen in scalar
mode (4 * 64), I used -fno-inline. Otherwise function "Set" gets inlined.
(snip)
movq %rsi, (%rsp)
movq %rdi, %rsi
movq %rsp, %rdi
movq %rdx, 8(%rsp)
movq %rcx, 16(%rsp)
movq %r8, 24(%rsp)
call Set
addq $40, %rsp
(snip)
>From gcc-bugs-return-562957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:37:12 2017
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Subject: [Bug libstdc++/80690] [7/8 Regression] clang rejects std::thread with -std=c++1z
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like the DECAY_COPY isn't decaying the function reference to a function
pointer.
>From gcc-bugs-return-562958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:43:49 2017
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Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 10:46:00 -0000
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--- Comment #3 from Rohit <rohitarulraj at gmail dot com> ---
Code generated with ICC17 (-O2 -march=core-avx2)
test(st2*, unsigned long, unsigned long, long, long):
movq %rsi, 8(%rdi) #29.9
movq %rdx, 16(%rdi) #29.9
movq %rcx, 24(%rdi) #29.9
movq %r8, 32(%rdi) #29.9
ret #25.1
Set(st1 const*, st2*):
movq (%rdi), %rax #29.22
movq %rax, 8(%rsi) #29.9
movq 8(%rdi), %rdx #29.22
movq %rdx, 16(%rsi) #29.9
movq 16(%rdi), %rcx #29.22
movq %rcx, 24(%rsi) #29.9
movq 24(%rdi), %r8 #29.22
movq %r8, 32(%rsi) #29.9
ret
>From gcc-bugs-return-562959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:46:11 2017
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From: "griwes at griwes dot info" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80691] New: Narrowing conversion in {} allowed in a SFINAE context
Date: Tue, 09 May 2017 10:49:00 -0000
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Bug ID: 80691
Summary: Narrowing conversion in {} allowed in a SFINAE context
Product: gcc
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There seems to be a regression in GCC 7.1 in how the compiler treats narrowing
conversions in braced initialization, when using a user-provided constructor
for a type. The following code compiles with GCC 6.3 and several recent
versions of Clang (and some older too, if you implement void_t yourself), but
the second static_assert fails on GCC 7.1.
#include <utility>
#include <type_traits>
using std::void_t;
template<typename T, typename U, typename = void>
struct is_nonnarrowing_conversion : std::false_type {};
template<typename T, typename U>
struct is_nonnarrowing_conversion<T, U,
void_t<decltype(T{ std::declval<U>() })>> : std::true_type {};
template<typename T>
class wrapper
{
public:
wrapper(T) {}
};
static_assert(!is_nonnarrowing_conversion<int, float>());
static_assert(!is_nonnarrowing_conversion<wrapper<int>, float>());
As I read it, this explicitly violates [dcl.init.list]3.6
(http://eel.is/c++draft/dcl.init.list#3.6).
>From gcc-bugs-return-562960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:49:16 2017
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From: "sisyphus1 at optusnet dot com.au" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80692] New: _Decimal64 -0 != 0 unless optimization is turned off
Date: Tue, 09 May 2017 10:54:00 -0000
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Bug ID: 80692
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Created attachment 41334
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41334&action=edit
C program exhibits bug if compiled with optimization
Hi,
The attached program is fine if compiled without any optimization.
Otherwise it indicates that a variable holding the value -0.DD is not equal to
0.DD, though still accepts that -0.DD == -0.DD.
This happens on MS Windows (for a range of gcc versions from 4.7.0 through to
7.1.0).
On Linux (Ubuntu 16.04) I have tested only with gcc-5.4.0 where the same
behaviour occurs.
I haven't struck a gcc compiler that supports decimal floats but doesn't
exhibit the same behaviour.
The _Decimal128 type is similarly afflicted - I haven't checked _Decimal32.
Cheers,
Rob
>From gcc-bugs-return-562961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 10:54:47 2017
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Subject: [Bug libstdc++/80690] [7/8 Regression] clang rejects std::thread with -std=c++1z
Date: Tue, 09 May 2017 11:07:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Our std::is_function is not compatible with Clang:
struct true_type { static constexpr bool value = true; };
struct false_type { static constexpr bool value = false; };
template<typename>
struct is_function
: public false_type { };
#if __cpp_noexcept_function_type
template<typename _Res, typename... _ArgTypes, bool ne>
struct is_function<_Res(_ArgTypes...) noexcept(ne)>
: public true_type { };
#else
template<typename _Res, typename... _ArgTypes>
struct is_function<_Res(_ArgTypes...)>
: public true_type { };
#endif
template<typename T> struct remove_reference { using type = T; };
template<typename T> struct remove_reference<T&> { using type = T; };
template<typename T> struct remove_reference<T&&> { using type = T; };
static_assert( is_function<void()>::value, "" );
prog.cc:10:10: error: class template partial specialization contains a template
parameter that cannot be deduced; this partial specialization will never be
used [-Wunusable-partial-specialization]
struct is_function<_Res(_ArgTypes...) noexcept(ne)>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:9:53: note: non-deducible template parameter 'ne'
template<typename _Res, typename... _ArgTypes, bool ne>
^
prog.cc:22:1: error: static_assert failed ""
static_assert( is_function<void()>::value, "" );
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
I think it's a Clang bug, that should be deducible.
>From gcc-bugs-return-562962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 11:07:37 2017
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80682] __is_trivially_constructible(void, int) returns true.
Date: Tue, 09 May 2017 11:13:00 -0000
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
I'll see what I can do. is_trivially_xible seems to return true here, dunno why
yet. I'll debug it. Chances are we merely need to treat void specially in that
function, because the functions it calls that check for conversions and
standard conversions are fine as is, because they have other callers and int is
certainly convertible to void.
>From gcc-bugs-return-562963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 11:13:47 2017
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Subject: [Bug libstdc++/80690] [7/8 Regression] clang rejects std::thread with -std=c++1z
Date: Tue, 09 May 2017 11:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80690
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reported to https://bugs.llvm.org/show_bug.cgi?id=32974
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80693] New: [6/7/8 Regression] wrong code with -O -fno-tree-coalesce-vars
Date: Tue, 09 May 2017 11:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80693
Bug ID: 80693
Summary: [6/7/8 Regression] wrong code with -O
-fno-tree-coalesce-vars
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Created attachment 41335
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41335&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc -O -fno-tree-coalesce-vars testcase.c
$ ./a.out
Aborted
The .combine dump shows:
...
Trying 18, 19 -> 20:
Failed to match this instruction:
(set (reg:HI 116)
(and:HI (not:HI (reg/v:HI 112 [ u16_1D.1800 ]))
(const_int 1 [0x1])))
Successfully matched this instruction:
(set (reg:HI 117)
(not:HI (reg/v:HI 112 [ u16_1D.1800 ])))
Successfully matched this instruction:
(set (reg:HI 116)
(and:HI (reg:HI 117)
(const_int 1 [0x1])))
allowing combination of insns 18, 19 and 20
original costs 0 + 4 + 4 = 0
replacement costs 4 + 4 = 8
deferring deletion of insn with uid = 18.
modifying insn i2 19: r117:HI=!r112:HI
deferring rescan insn with uid = 19.
modifying insn i3 20: {r116:HI=r117:HI&0x1;clobber flags:CC;}
REG_UNUSED flags:CC
REG_DEAD r117:HI
deferring rescan insn with uid = 20.
...
Trying 19 -> 20:
Successfully matched this instruction:
(parallel [
(set (reg:HI 116)
(xor:HI (reg/v:HI 112 [ u16_1D.1800 ])
(const_int 1 [0x1])))
(clobber (reg:CC 17 flags))
])
allowing combination of insns 19 and 20
original costs 4 + 4 = 8
replacement cost 4
deferring deletion of insn with uid = 19.
modifying insn i3 20: {r116:HI=r112:HI^0x1;clobber flags:CC;}
REG_UNUSED flags:CC
deferring rescan insn with uid = 20.
...
Which looks wrong, since it changes "r116:HI=!r112:HI&1" (can be 0 or 1) to
"r116:HI=r112:HI^0x1" (can be anything).
Also, the costs dump in the first replacement looks wrong:
original costs 0 + 4 + 4 = 0
$ x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-247635-checking-yes-rtl-df-extra-nographite-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-247635-checking-yes-rtl-df-extra-nographite-amd64
Thread model: posix
gcc version 8.0.0 20170505 (experimental) (GCC)
Tested revisions:
trunk r247635 - FAIL
7-branch r247545 - FAIL
6-branch r247359 - FAIL
5-branch r247456 - OK
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80525] -Wlogical-op confused by undefined integer overflow
Date: Tue, 09 May 2017 11:22:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue May 9 11:21:14 2017
New Revision: 247786
URL: https://gcc.gnu.org/viewcvs?rev=247786&root=gcc&view=rev
Log:
PR c/80525
* c-warn.c (unwrap_c_maybe_const): New.
(warn_logical_operator): Call it.
* c-c++-common/Wlogical-op-1.c: Don't use -fwrapv anymore.
* c-c++-common/Wlogical-op-2.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wlogical-op-2.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wlogical-op-1.c
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80525] -Wlogical-op confused by undefined integer overflow
Date: Tue, 09 May 2017 11:29:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 8.
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Subject: [Bug libstdc++/79283] read_symlink fails with /proc symlinks
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
Ever confirmed|0 |1
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80693] [6/7/8 Regression] wrong code with -O -fno-tree-coalesce-vars
Date: Tue, 09 May 2017 11:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |5.4.1
Target Milestone|--- |6.4
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 11:52:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
What does ICC do if you use int and/or short fields in st1? Does it perform
struct copying member-wise?
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Subject: [Bug libstdc++/79839] malloc(0) returns 0 on AIX even with _LINUX_SOURCE_COMPAT
Date: Tue, 09 May 2017 12:04:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can reproduce this on AIX 7.1.3.0 but it returns a valid pointer on AIX
7.2.0.0
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Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 12:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80689
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that using unaligned 128bit moves might involve an even larger STLF
penalty than if the loads/stores were aligned due to the fact they might cross
a cache-line boundary and how store queues usually are laid out on cache-line
arrangement.
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80682] __is_trivially_constructible(void, int) returns true.
Date: Tue, 09 May 2017 12:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80682
--- Comment #2 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Initial patch: https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00632.html
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/79839] malloc(0) returns 0 on AIX even with _LINUX_SOURCE_COMPAT
Date: Tue, 09 May 2017 12:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79839
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Component|libstdc++ |target
Resolution|--- |FIXED
Target Milestone|--- |6.2
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. with GCC 6 and later you get the same behaviour for <stdlib.h> because
that includes <cstdlib> now.
My tests on AIX 7.1.3.0 were not the same GCC version, it looks like this was
fixed for GCC 6.2.0 by r233029 (and r237394 on trunk). The fixed header now
has:
# 748
"/home/jwakely/gcc/6/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.1/include-fixed/stdlib.h"
3 4
extern void *__linux_malloc(size_t);
extern void *__linux_realloc(void *, size_t);
extern void *__linux_calloc(size_t, size_t);
extern void *__linux_valloc(size_t);
extern void *malloc(size_t) __asm__("__linux_malloc");
extern void *calloc(size_t, size_t) __asm__("__linux_calloc");
extern void *realloc(void *, size_t) __asm__("__linux_realloc");
extern void *valloc(size_t) __asm__("__linux_valloc");
This is necessary because the C++ standard explicitly forbids malloc and other
functions from the C library from being defined as macros, they must be defined
as functions.
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Subject: [Bug testsuite/80678] [6 Regression] g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678
Date: Tue, 09 May 2017 12:25:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 9 12:24:53 2017
New Revision: 247789
URL: https://gcc.gnu.org/viewcvs?rev=247789&root=gcc&view=rev
Log:
PR testsuite/80678
2016-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/71310
PR bootstrap/71510
* expr.h (get_bit_range): Declare.
* expr.c (get_bit_range): Export.
* fold-const.c (optimize_bit_field_compare): Use get_bit_range and
word_mode again to constrain the bitfield access.
2016-06-11 Segher Boessenkool <segher@kernel.crashing.org>
PR middle-end/71310
* fold-const.c (optimize_bit_field_compare): Don't try to use
word_mode unconditionally for reading the bit field, look at
DECL_BIT_FIELD_REPRESENTATIVE instead.
* gcc.target/powerpc/pr71310.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/pr71310.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/expr.c
branches/gcc-6-branch/gcc/expr.h
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/79839] malloc(0) returns 0 on AIX even with _LINUX_SOURCE_COMPAT
Date: Tue, 09 May 2017 12:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.2 |5.5
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It was also fixed on the gcc-5-branch by r237479
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Subject: [Bug bootstrap/71510] [7 Regression] Failed to bootstrap with --with-arch=corei7 --with-cpu=intel
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71510
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 9 12:24:53 2017
New Revision: 247789
URL: https://gcc.gnu.org/viewcvs?rev=247789&root=gcc&view=rev
Log:
PR testsuite/80678
2016-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/71310
PR bootstrap/71510
* expr.h (get_bit_range): Declare.
* expr.c (get_bit_range): Export.
* fold-const.c (optimize_bit_field_compare): Use get_bit_range and
word_mode again to constrain the bitfield access.
2016-06-11 Segher Boessenkool <segher@kernel.crashing.org>
PR middle-end/71310
* fold-const.c (optimize_bit_field_compare): Don't try to use
word_mode unconditionally for reading the bit field, look at
DECL_BIT_FIELD_REPRESENTATIVE instead.
* gcc.target/powerpc/pr71310.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/pr71310.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/expr.c
branches/gcc-6-branch/gcc/expr.h
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71310] Bitfields cause load hit store with smaller store and larger load
Date: Tue, 09 May 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71310
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 9 12:24:53 2017
New Revision: 247789
URL: https://gcc.gnu.org/viewcvs?rev=247789&root=gcc&view=rev
Log:
PR testsuite/80678
2016-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/71310
PR bootstrap/71510
* expr.h (get_bit_range): Declare.
* expr.c (get_bit_range): Export.
* fold-const.c (optimize_bit_field_compare): Use get_bit_range and
word_mode again to constrain the bitfield access.
2016-06-11 Segher Boessenkool <segher@kernel.crashing.org>
PR middle-end/71310
* fold-const.c (optimize_bit_field_compare): Don't try to use
word_mode unconditionally for reading the bit field, look at
DECL_BIT_FIELD_REPRESENTATIVE instead.
* gcc.target/powerpc/pr71310.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/pr71310.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/expr.c
branches/gcc-6-branch/gcc/expr.h
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/80262] address space gets lost in memory access
Date: Tue, 09 May 2017 12:28:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:12 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/80275] [6 Regression] Poor (but valid) code generated by optimizer passing optimizer list to function
Date: Tue, 09 May 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80275
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:04 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/80222] may_alias folded away
Date: Tue, 09 May 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80222
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:11 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/80334] [5/6 Regression] Segfault when taking address of copy of unaligned struct
Date: Tue, 09 May 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80334
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:29:17 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80478] Calling `std::bind` on member functions marked as `noexcept` fails to compile with -std=c++1z
Date: Tue, 09 May 2017 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80478
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-09
Version|7.0.1 |7.1.0
Ever confirmed|0 |1
>From gcc-bugs-return-562981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:07 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/80362] [5/6 Regression] gcc miscompiles arithmetic with signed char
Date: Tue, 09 May 2017 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80362
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:07 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80539] [5 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly"
Date: Tue, 09 May 2017 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80539
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:28:16 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80492] [5/6 Regression] Wrong code when unrolling a loop with inline asm and local regs
Date: Tue, 09 May 2017 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80492
--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 9 12:27:24 2017
New Revision: 247790
URL: https://gcc.gnu.org/viewcvs?rev=247790&root=gcc&view=rev
Log:
2017-05-09 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80262
* tree-sra.c (build_ref_for_offset): Preserve address-space
information.
* tree-ssa-sccvn.c (vn_reference_maybe_forwprop_address):
Drop useless address-space information on MEM_REF offsets.
* gcc.target/i386/pr80262.c: New testcase.
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2017-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/80492
* alias.c (compare_base_decls): Handle registers with asm
specification conservatively.
* gcc.dg/pr80492.c: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80275.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr80492.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr80262.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/alias.c
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chrec.c
branches/gcc-6-branch/gcc/tree-sra.c
branches/gcc-6-branch/gcc/tree-ssa-loop-ivopts.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-562986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:29:49 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/80275] [6 Regression] Poor (but valid) code generated by optimizer passing optimizer list to function
Date: Tue, 09 May 2017 12:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80275
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail|6.3.1 |6.3.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-562987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:31:19 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/80262] address space gets lost in memory access
Date: Tue, 09 May 2017 12:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80262
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail| |6.3.0
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.4.
>From gcc-bugs-return-562988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:43:31 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 target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 09 May 2017 12:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Any chance to see this PR fixed soon?
>From gcc-bugs-return-562989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 12:46:09 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/35560] Missing CSE/PRE for memory operations involved in virtual call.
Date: Tue, 09 May 2017 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35560
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
CC| |hubicka at gcc dot gnu.org
Assignee|davidxl at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
The devirt machinery nowadays might have enough tools to do the disambiguation.
IIRC david is no longer working on GCC so unassigning him.
Current GIMPLE IL is
<bb 2> [100.00%]:
_1 = ap_9(D)->_vptr.A;
_2 = *_1;
_12 = OBJ_TYPE_REF(_2;(struct A)ap_9(D)->0) (ap_9(D), i_10(D));
_3 = ap_9(D)->_vptr.A;
_4 = MEM[(int (*__vtbl_ptr_type) () *)_3 + 8B];
_14 = OBJ_TYPE_REF(_4;(struct A)ap_9(D)->1) (ap_9(D), i_10(D));
_5 = _12 + _14;
_6 = ap_9(D)->_vptr.A;
_7 = *_6;
_16 = OBJ_TYPE_REF(_7;(struct A)ap_9(D)->0) (ap_9(D), i_10(D));
_17 = _5 + _16;
return _17;
I believe our representation of virtual calls is less than optimal here for
the purpose of CSE and disambiguation.
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Tue, 09 May 2017 12:56:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Better testcase:
int
foo (int i)
{
return ((i * (unsigned long long) (-0 + 1UL)) * 2) % 1;
}
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 09 May 2017 13:11:00 -0000
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--- Comment #12 from Tristan Gingold <gingold at adacore dot com> ---
On 09/05/2017 14:43, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Any chance to see this PR fixed soon?
Did you try to get gnat1 built without -static-libgcc ?
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Subject: [Bug libstdc++/80285] `std::make_shared` performs two separate allocations with `-fno-rtti`
Date: Tue, 09 May 2017 13:14:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-09
Version|7.0.1 |7.1.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
Severity|normal |enhancement
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 09 May 2017 13:17:00 -0000
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--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Did you try to get gnat1 built without -static-libgcc ?
How am I supposed to do that? I have used the same clean configure
../p_work/configure --prefix=/opt/gcc/gcc8p-247298p1
--enable-languages=c,c++,lto,fortran,ada,objc,obj-c++ --with-gmp=/opt/mp-new
--with-system-zlib --enable-checking=release --with-isl=/opt/mp-new
--enable-lto --enable-plugin --with-arch=corei7 --with-cpu=corei7
and bootstrap for r247298 (bootstraps) and r247302 (fails).
The bootstrap compiler is
gcc version 8.0.0 20170425 (experimental) [trunk revision 247256]
configured with
../_clean/configure --prefix=/opt/gcc/gcc8a
--enable-languages=c,c++,fortran,ada,lto --with-gmp=/opt/mp-new
--with-system-zlib --enable-checking=release --with-isl=/opt/mp-new
--enable-lto --enable-plugin
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From: "gingold at adacore dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 09 May 2017 13:40:00 -0000
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--- Comment #14 from Tristan Gingold <gingold at adacore dot com> ---
On 09/05/2017 15:14, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>> Did you try to get gnat1 built without -static-libgcc ?
>
> How am I supposed to do that? I have used the same clean configure
>
> ../p_work/configure --prefix=/opt/gcc/gcc8p-247298p1
> --enable-languages=c,c++,lto,fortran,ada,objc,obj-c++ --with-gmp=/opt/mp-new
> --with-system-zlib --enable-checking=release --with-isl=/opt/mp-new
> --enable-lto --enable-plugin --with-arch=corei7 --with-cpu=corei7
>
> and bootstrap for r247298 (bootstraps) and r247302 (fails).
>
> The bootstrap compiler is
>
> gcc version 8.0.0 20170425 (experimental) [trunk revision 247256]
>
> configured with
>
> ../_clean/configure --prefix=/opt/gcc/gcc8a
> --enable-languages=c,c++,fortran,ada,lto --with-gmp=/opt/mp-new
> --with-system-zlib --enable-checking=release --with-isl=/opt/mp-new
> --enable-lto --enable-plugin
You should add:
--with-stage1-ldflags=-static-libstdc++
--with-boot-ldflags=-static-libstdc++
to your configure line.
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Subject: [Bug testsuite/80611] [8 regression] test case gfortran.dg/coarray_lock_7.f90 fails starting with r247495
Date: Tue, 09 May 2017 13:46:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The following patch fixes the failures:
--- ../_clean/gcc/testsuite/gfortran.dg/coarray_lock_7.f90 2016-09-19
18:03:55.000000000 +0200
+++ gcc/testsuite/gfortran.dg/coarray_lock_7.f90 2017-05-09
15:37:16.000000000 +0200
@@ -35,8 +35,8 @@ end
! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., 0, 0,
0B, 0B, 0B, 0\\);" 1 "original" } }
! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., 0,
0, 0B, 0B, 0\\);" 1 "original" } }
-! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., \\(3 -
\\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
\\(integer\\(kind=4\\)\\) MAX_EXPR <\\(parm...dim\\\[0\\\].ubound -
parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\* \\(3 - \\(integer\\(kind=4\\)\\)
parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);|_gfortran_caf_lock
\\(caf_token.1, \\(3 - parm...dim\\\[0\\\].lbound\\) \\+ MAX_EXPR
<\\(parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\*
\\(3 - parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);" 1 "original" } }
-! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., \\(2
- \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
\\(integer\\(kind=4\\)\\) MAX_EXPR <\\(parm...dim\\\[0\\\].ubound -
parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\* \\(3 - \\(integer\\(kind=4\\)\\)
parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);|_gfortran_caf_unlock
\\(caf_token.., \\(2 - parm...dim\\\[0\\\].lbound\\) \\+ MAX_EXPR
<\\(parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\*
\\(3 - parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);" 1 "original" } }
+! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., \\(3 -
\\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
\\(integer\\(kind=4\\)\\) \\(MAX_EXPR <parm...dim\\\[0\\\].ubound -
parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3 - \\(integer\\(kind=4\\)\\)
parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);|_gfortran_caf_lock
\\(caf_token.1, \\(3 - parm...dim\\\[0\\\].lbound\\) \\+ \\(MAX_EXPR
<parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3
- parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);" 1 "original" } }
+! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., \\(2
- \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
\\(integer\\(kind=4\\)\\) \\(MAX_EXPR <parm...dim\\\[0\\\].ubound -
parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3 - \\(integer\\(kind=4\\)\\)
parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);|_gfortran_caf_unlock
\\(caf_token.., \\(2 - parm...dim\\\[0\\\].lbound\\) \\+ \\(MAX_EXPR
<parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3
- parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);" 1 "original" } }
! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(three.token, 0, 5 -
\\(integer\\(kind=4\\)\\) three.dim\\\[0\\\].lbound, &acquired.\[0-9\]+, 0B,
0B, 0\\);|_gfortran_caf_lock \\(three.token, 0, 5 - three.dim\\\[0\\\].lbound,
&acquired.\[0-9\]+, 0B, 0B, 0\\);" 1 "original" } }
! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(three.token, 0, 8
- \\(integer\\(kind=4\\)\\) three.dim\\\[0\\\].lbound, &ii, 0B,
0\\);|_gfortran_caf_unlock \\(three.token, 0, 8 - three.dim\\\[0\\\].lbound,
&ii, 0B, 0\\);" 1 "original" } }
I didn't try to find which revision replaced
MAX_EXPR <(parm.9.dim[0].ubound - parm.9.dim[0].lbound) + 1, 0>
with
(MAX_EXPR <parm.9.dim[0].ubound - parm.9.dim[0].lbound, -1> + 1)
>From gcc-bugs-return-562996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 13:46:06 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80611] [8 regression] test case gfortran.dg/coarray_lock_7.f90 fails starting with r247495
Date: Tue, 09 May 2017 13:49:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 9 May 2017, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80611
>
> --- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The following patch fixes the failures:
>
> --- ../_clean/gcc/testsuite/gfortran.dg/coarray_lock_7.f90 2016-09-19
> 18:03:55.000000000 +0200
> +++ gcc/testsuite/gfortran.dg/coarray_lock_7.f90 2017-05-09
> 15:37:16.000000000 +0200
> @@ -35,8 +35,8 @@ end
> ! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., 0, 0,
> 0B, 0B, 0B, 0\\);" 1 "original" } }
> ! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., 0,
> 0, 0B, 0B, 0\\);" 1 "original" } }
>
> -! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., \\(3 -
> \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
> \\(integer\\(kind=4\\)\\) MAX_EXPR <\\(parm...dim\\\[0\\\].ubound -
> parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\* \\(3 - \\(integer\\(kind=4\\)\\)
> parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);|_gfortran_caf_lock
> \\(caf_token.1, \\(3 - parm...dim\\\[0\\\].lbound\\) \\+ MAX_EXPR
> <\\(parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\*
> \\(3 - parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);" 1 "original" } }
> -! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., \\(2
> - \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
> \\(integer\\(kind=4\\)\\) MAX_EXPR <\\(parm...dim\\\[0\\\].ubound -
> parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\* \\(3 - \\(integer\\(kind=4\\)\\)
> parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);|_gfortran_caf_unlock
> \\(caf_token.., \\(2 - parm...dim\\\[0\\\].lbound\\) \\+ MAX_EXPR
> <\\(parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound\\) \\+ 1, 0> \\*
> \\(3 - parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);" 1 "original" } }
> +! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(caf_token.., \\(3 -
> \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
> \\(integer\\(kind=4\\)\\) \\(MAX_EXPR <parm...dim\\\[0\\\].ubound -
> parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3 - \\(integer\\(kind=4\\)\\)
> parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);|_gfortran_caf_lock
> \\(caf_token.1, \\(3 - parm...dim\\\[0\\\].lbound\\) \\+ \\(MAX_EXPR
> <parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3
> - parm...dim\\\[1\\\].lbound\\), 0, 0B, &ii, 0B, 0\\);" 1 "original" } }
> +! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(caf_token.., \\(2
> - \\(integer\\(kind=4\\)\\) parm...dim\\\[0\\\].lbound\\) \\+
> \\(integer\\(kind=4\\)\\) \\(MAX_EXPR <parm...dim\\\[0\\\].ubound -
> parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3 - \\(integer\\(kind=4\\)\\)
> parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);|_gfortran_caf_unlock
> \\(caf_token.., \\(2 - parm...dim\\\[0\\\].lbound\\) \\+ \\(MAX_EXPR
> <parm...dim\\\[0\\\].ubound - parm...dim\\\[0\\\].lbound, -1> \\+ 1\\) \\* \\(3
> - parm...dim\\\[1\\\].lbound\\), 0, &ii, 0B, 0\\);" 1 "original" } }
>
> ! { dg-final { scan-tree-dump-times "_gfortran_caf_lock \\(three.token, 0, 5 -
> \\(integer\\(kind=4\\)\\) three.dim\\\[0\\\].lbound, &acquired.\[0-9\]+, 0B,
> 0B, 0\\);|_gfortran_caf_lock \\(three.token, 0, 5 - three.dim\\\[0\\\].lbound,
> &acquired.\[0-9\]+, 0B, 0B, 0\\);" 1 "original" } }
> ! { dg-final { scan-tree-dump-times "_gfortran_caf_unlock \\(three.token, 0, 8
> - \\(integer\\(kind=4\\)\\) three.dim\\\[0\\\].lbound, &ii, 0B,
> 0\\);|_gfortran_caf_unlock \\(three.token, 0, 8 - three.dim\\\[0\\\].lbound,
> &ii, 0B, 0\\);" 1 "original" } }
>
> I didn't try to find which revision replaced
>
> MAX_EXPR <(parm.9.dim[0].ubound - parm.9.dim[0].lbound) + 1, 0>
>
> with
>
> (MAX_EXPR <parm.9.dim[0].ubound - parm.9.dim[0].lbound, -1> + 1)
The one enabling strict overflow by default for sure. Thanks for fixing
and please commit!
>From gcc-bugs-return-562997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 13:49:39 2017
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Subject: [Bug c++/70167] Some const array prvalues are incorrectly treated as lvalues
Date: Tue, 09 May 2017 14:08:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue May 9 13:48:58 2017
New Revision: 247793
URL: https://gcc.gnu.org/viewcvs?rev=247793&root=gcc&view=rev
Log:
PR c++/70167 - array prvalue treated as lvalue
* cp-tree.h (CONSTRUCTOR_C99_COMPOUND_LITERAL): New.
(enum fcl_t): New.
* semantics.c (finish_compound_literal): Add fcl_context parameter.
Only make a static variable for C99 syntax.
* parser.c (cp_parser_postfix_expression): Pass it.
* pt.c (tsubst_copy_and_build): Likewise.
* call.c (extend_ref_init_temps): Set
DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/initlist-array6.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
>From gcc-bugs-return-562998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 14:08:18 2017
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Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Tue, 09 May 2017 14:35:00 -0000
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--- Comment #6 from Venkataramanan <venkataramanan.kumar at amd dot com> ---
(In reply to Richard Biener from comment #4)
> What does ICC do if you use int and/or short fields in st1? Does it perform
> struct copying member-wise?
It copies member wise. -O2 /-O2 -march=core-avx2
For "int" member types
test(st2*, unsigned long, unsigned long, long, long):
mov DWORD PTR [4+rdi], esi #29.9
mov DWORD PTR [8+rdi], edx #29.9
mov DWORD PTR [12+rdi], ecx #29.9
mov DWORD PTR [16+rdi], r8d #29.9
ret #25.1
Set(st1 const*, st2*):
mov eax, DWORD PTR [rdi] #29.22
mov DWORD PTR [4+rsi], eax #29.9
mov edx, DWORD PTR [4+rdi] #29.22
mov DWORD PTR [8+rsi], edx #29.9
mov ecx, DWORD PTR [8+rdi] #29.22
mov DWORD PTR [12+rsi], ecx #29.9
mov r8d, DWORD PTR [12+rdi] #29.22
mov DWORD PTR [16+rsi], r8d #29.9
ret
for "short" member type
test(st2*, unsigned long, unsigned long, long, long):
mov WORD PTR [4+rdi], si #29.9
mov WORD PTR [6+rdi], dx #29.9
mov WORD PTR [8+rdi], cx #29.9
mov WORD PTR [10+rdi], r8w #29.9
ret #25.1
Set(st1 const*, st2*):
movzx eax, WORD PTR [rdi] #29.22
mov WORD PTR [4+rsi], ax #29.9
movzx edx, WORD PTR [2+rdi] #29.22
mov WORD PTR [6+rsi], dx #29.9
movzx ecx, WORD PTR [4+rdi] #29.22
mov WORD PTR [8+rsi], cx #29.9
movzx r8d, WORD PTR [6+rdi] #29.22
mov WORD PTR [10+rsi], r8w #29.9
ret #30.1
>From gcc-bugs-return-562999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 14:35:10 2017
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
Date: Tue, 09 May 2017 14:55:00 -0000
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--- Comment #21 from Martin Sebor <msebor at gcc dot gnu.org> ---
The rtl.c error was discussed in the context of some other bug having to do
with profiledbootstrap failure (I can't find the bug now). If I recall, it's
due to the same signed <-> unsigned conversion issue as a number of other
warnings of this kind, i.e., rtvec_alloc taking a signed int argument that's
being converted to size_t. Besides configuring with the --disable-werror
recommended for profiledbootstrap, adding a gcc_assert(n >= 0) fixed it.
Strangely, though, changing the function's argument to unsigned seemed to
tickle some latent bug somewhere and caused GCC to crash during bootstrap. I
never investigated why.
>From gcc-bugs-return-563000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 14:55:46 2017
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Subject: [Bug testsuite/80694] New: [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
Date: Tue, 09 May 2017 15:00:00 -0000
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Bug ID: 80694
Summary: [8 regression] test cases gcc.dg/vect/vect-44.c and
vect-50.c fail starting with r247780
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r247780 updated (well, reverted) these two test cases and now they are failing
on powerpc64le.
spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect-50.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -maltivec -mpower8-vector
-ftree-vectorize -fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details
-lm -o ./vect-50.exe
PASS: gcc.dg/vect/vect-50.c (test for excess errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-6.2.0/lib64
spawn [open ...]
PASS: gcc.dg/vect/vect-50.c execution test
PASS: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Vectorizing an unaligned
access" 2
FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Vectorizing an unaligned
access" 2
FAIL: gcc.dg/vect/vect-50.c scan-tree-dump-times vect "Alignment of access
forced using peeling" 1
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect-50.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mpower8-vector -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-vect-details -lm -o ./vect-50.exe (timeout = 300)
spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect-50.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects
-maltivec -mpower8-vector -ftree-vectorize -fno-vect-cost-model -fno-common -O2
-fdump-tree-vect-details -lm -o ./vect-50.exe
PASS: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects (test for excess errors)
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test/gcc::/home/seurer/gcc/build/gcc-test/gcc:/home/seurer/gcc/build/gcc-test/./gmp/.libs:/home/seurer/gcc/build/gcc-test/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test/./isl/.libs:/home/seurer/gcc/build/gcc-test/./prev-isl/.libs:/home/seurer/gcc/install/gcc-6.2.0/lib64
spawn [open ...]
PASS: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects execution test
PASS: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect
"vectorized 1 loops" 1
FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect
"Vectorizing an unaligned access" 2
FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect
"Vectorizing an unaligned access" 2
FAIL: gcc.dg/vect/vect-50.c -flto -ffat-lto-objects scan-tree-dump-times vect
"Alignment of access forced using peeling" 1
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/vect/vect.exp completed
in 1 seconds
=== gcc Summary ===
# of expected passes 6
# of unexpected failures 6
>From gcc-bugs-return-563001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 15:00:52 2017
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From: "griwes at griwes dot info" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80691] Narrowing conversion in {} allowed in a SFINAE context
Date: Tue, 09 May 2017 15:13:00 -0000
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--- Comment #1 from Michał Dominiak <griwes at griwes dot info> ---
This bug makes it seem (in SFINAE contexts) that std::string is constructible
from double with an initializer-list constructor, without narrowing:
#include <string>
#include <type_traits>
using std::void_t;
template<typename T, typename U, typename = void>
struct is_nonnarrowing_conversion : std::false_type {};
template<typename T, typename U>
struct is_nonnarrowing_conversion<T, U,
void_t<decltype(T{ std::declval<U>() })>> : std::true_type {};
static_assert(!is_nonnarrowing_conversion<std::string, double>());
>From gcc-bugs-return-563002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 15:13:13 2017
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Subject: [Bug middle-end/77709] specified destination size warning does not work when cross-compiling from 64 host to 32bit target
Date: Tue, 09 May 2017 15:17:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Sorry, I forgot about this bug. The test has changed and the line numbers in
the failures don't correspond to the same assertions in the latest revision but
the problem should be fixed. I don't see any failures in this test in the
results reported for arm-none-eabi or other 32-bit targets. If you still see
failures on trunk, can you post the current output?
>From gcc-bugs-return-563003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 15:17:22 2017
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Subject: [Bug middle-end/77709] specified destination size warning does not work when cross-compiling from 64 host to 32bit target
Date: Tue, 09 May 2017 15:23:00 -0000
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> Sorry, I forgot about this bug. The test has changed and the line numbers
> in the failures don't correspond to the same assertions in the latest
> revision but the problem should be fixed. I don't see any failures in this
> test in the results reported for arm-none-eabi or other 32-bit targets. If
> you still see failures on trunk, can you post the current output?
My bad, it's only PASS now, I should have checked before pinging. Sorry for the
noise
>From gcc-bugs-return-563004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 15:23:37 2017
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvODA2NzNdIHNwYXJjdjktc29sYXJpczIuMTEgYm9vdHN0?= =?UTF-8?B?cmFwIGVycm9yOiBjYW5ub3QgY29udmVydCDigJhmb3JtYXRfc3RkX3ZlcnNp?= =?UTF-8?B?b24ge2VudW194oCZIHRvIOKAmGNvbnN0IGNoYXIq4oCZIGluIGluaXRpYWxp?= =?UTF-8?B?emF0aW9u?Date: Tue, 09 May 2017 15:35:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-09
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Looks like the error might actually be caused by my own patch for bug 80280
(now committed). Let me fix it.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80691] Narrowing conversion in {} allowed in a SFINAE context
Date: Tue, 09 May 2017 15:39:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This only happens in C++17 mode. With -std=gnu++14 it compiles OK, and also
with -std=c++14 if you make it C++14-compatible:
#include <utility>
#include <type_traits>
template<typename...> using void_t = void;
template<typename T, typename U, typename = void>
struct is_nonnarrowing_conversion : std::false_type {};
template<typename T, typename U>
struct is_nonnarrowing_conversion<T, U,
void_t<decltype(T{ std::declval<U>() })>> : std::true_type {};
template<typename T>
class wrapper
{
public:
wrapper(T) {}
};
static_assert(!is_nonnarrowing_conversion<int, float>(), "");
static_assert(!is_nonnarrowing_conversion<wrapper<int>, float>(), "");
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Subject: [Bug fortran/80668] wrong error message with -finit-derived
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Fritz Reese <foreese at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Fritz Reese <foreese at gcc dot gnu.org> ---
Patch submitted, pending trunk:
https://gcc.gnu.org/ml/fortran/2017-05/msg00030.html
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Tue, 09 May 2017 15:41:00 -0000
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 9 15:39:54 2017
New Revision: 247801
URL: https://gcc.gnu.org/viewcvs?rev=247801&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR translation/80280
* config/i386/msformat-c.c (ms_printf_flag_specs): Initialize new
data member added in r247778.
(ms_scanf_flag_specs, ms_strftime_flag_specs): Same.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/msformat-c.c
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
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--- Comment #15 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> You should add:
>
> --with-stage1-ldflags=-static-libstdc++
> --with-boot-ldflags=-static-libstdc++
>
> to your configure line.
With these lines added to my configure line I have been able to bootstrap
revision r247792. However this addition was not necessary before and I don't
think it is the end user responsibility to do the addition.
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Subject: [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c
Date: Tue, 09 May 2017 15:57:00 -0000
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 9 15:55:05 2017
New Revision: 247804
URL: https://gcc.gnu.org/viewcvs?rev=247804&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR translation/80280
* config/sol2-c.c (cmn_err_flag_specs): Initialize new data member
added in r247778.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sol2-c.c
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvODA2NzNdIHNwYXJjdjktc29sYXJpczIuMTEgYm9vdHN0?= =?UTF-8?B?cmFwIGVycm9yOiBjYW5ub3QgY29udmVydCDigJhmb3JtYXRfc3RkX3ZlcnNp?= =?UTF-8?B?b24ge2VudW194oCZIHRvIOKAmGNvbnN0IGNoYXIq4oCZIGluIGluaXRpYWxp?= =?UTF-8?B?emF0aW9u?Date: Tue, 09 May 2017 15:58:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed via r247804. The bootstrap succeeds.
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Subject: [Bug c++/80691] Narrowing conversion in {} allowed in a SFINAE context
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Standalone testcase that compiles as C++11 or C++14, fails as C++17:
struct true_type { static constexpr bool value = true; };
struct false_type { static constexpr bool value = false; };
template<typename...> using void_t = void;
template<typename T> T&& declval();
template<typename T, typename U, typename = void>
struct is_nonnarrowing_conversion : false_type {};
template<typename T, typename U>
struct is_nonnarrowing_conversion<T, U,
void_t<decltype(T{ declval<U>() })>> : true_type {};
template<typename T>
class wrapper
{
public:
wrapper(T) {}
};
static_assert(!is_nonnarrowing_conversion<int, float>::value, "");
static_assert(!is_nonnarrowing_conversion<wrapper<int>, float>::value, "");
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Subject: [Bug testsuite/80611] [8 regression] test case gfortran.dg/coarray_lock_7.f90 fails starting with r247495
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Revision 247803
Author: dominiq
Date: Tue May 9 15:47:02 2017 UTC (11 minutes, 52 seconds ago)
Changed paths: 2
Log Message:
2017-05-09 Dominique d'Humieres <dominiq@lps.ens.fr>
PR testsuite/80611
* gfortran.dg/coarray_lock_7.f90: Fix dg-final regexps.
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Would dropping the fold call from save_expr fix this?
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Tue, 09 May 2017 16:33:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
To expand on that, I think we want to drop that call from there and instead be
able to simplify somehow a SAVE_EXPR if after c_fully_fold or cp_fold it
becomes simple enough not to require any saving.
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Tue, 09 May 2017 16:34:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Yeah, it helps with this particular testcase (and I agree we want to get rid of
that fold() call in save_expr -- I'll take care of it), but I wonder if this
issue is something separate: starting with r230506 we can generate expressions
such as
i * ((unsigned long) -0 + 1) * 2
and given how fold() works we don't get to simplify the sub-expression
"(unsigned long) -0 + 1)" so this expression isn't folded to "i * 2". So I
wonder if we want something like
--- a/gcc/convert.c
+++ b/gcc/convert.c
@@ -524,7 +524,13 @@ convert_to_integer_1 (tree type, tree expr, bool dofold)
return expr;
return build2_loc (EXPR_LOCATION (expr), COMPOUND_EXPR, TREE_TYPE (t),
TREE_OPERAND (expr, 0), t);
- }
+ }
+
+ /* -0 is 0, so get rid of the NEGATE_EXPR. */
+ if (0 && ex_form == NEGATE_EXPR
+ && TREE_CODE (TREE_OPERAND (expr, 0)) == INTEGER_CST
+ && integer_zerop (TREE_OPERAND (expr, 0)))
+ return convert_to_integer_maybe_fold (type, TREE_OPERAND (expr, 0),
dofold);
/* Convert e.g. (long)round(d) -> lround(d). */
/* If we're converting to char, we may encounter differing behavior
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Tue, 09 May 2017 16:41:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I.e. I'm worried we could trigger the endless recursion also if we happen to
call fold() on that expression via a different path than from save_expr.
>From gcc-bugs-return-563018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 16:57:12 2017
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Subject: [Bug c++/80186] ICE on C++ code with invalid constructor: Segmentation fault (program cc1plus)
Date: Tue, 09 May 2017 16:57:00 -0000
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--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue May 9 16:56:34 2017
New Revision: 247807
URL: https://gcc.gnu.org/viewcvs?rev=247807&root=gcc&view=rev
Log:
/cp
2017-05-09 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/80186
* pt.c (tsubst_decl): Early return error_mark_node if
grok_ctor_properties returns false.
/testsuite
2017-05-09 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/80186
* g++.dg/template/crash126.C: New.
Added:
trunk/gcc/testsuite/g++.dg/template/crash126.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-563017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 16:41:51 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Tue, 09 May 2017 16:57:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But we ideally shouldn't be folding anything until we actually c_fully_fold or
cp_fold recursively, starting with the leafs. Most of the folders heavily rely
on that.
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Subject: [Bug c++/80186] ICE on C++ code with invalid constructor: Segmentation fault (program cc1plus)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
>From gcc-bugs-return-563020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 17:01:21 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Well, I hope we're not. Very much related: PR80386.
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Subject: [Bug sanitizer/80386] UBSAN: false positive - constant folding and reassosiation before instrumentation
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r247808.
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Removing the fold() call doesn't regress anything, btw.
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 9 17:32:59 2017
New Revision: 247808
URL: https://gcc.gnu.org/viewcvs?rev=247808&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
PR testsuite/80643
* c-c++-common/Wsizeof-pointer-memaccess2.c: Prune -Wformat-overflow
output.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c
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Subject: [Bug target/80695] New: gratuitous use of stxvx to store multiple pointers
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Bug ID: 80695
Summary: gratuitous use of stxvx to store multiple pointers
Product: gcc
Version: 7.1.0
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Priority: P3
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CC: meissner at gcc dot gnu.org, wschmidt at gcc dot gnu.org
Target Milestone: ---
Target: powerpc64*-*-* power9
Testing 7.1.0 on power9, compiling the following code with -O3 -mcpu=power9
typedef struct _IO_FILE {
int _flags; /* High-order word is _IO_MAGIC; rest is flags. */
char* _IO_read_ptr; /* Current read pointer */
char* _IO_read_end; /* End of get area. */
char* _IO_read_base; /* Start of putback+get area. */
char* _IO_write_base; /* Start of put area. */
char* _IO_write_ptr; /* Current put pointer. */
char* _IO_write_end; /* End of put area. */
char* _IO_buf_base; /* Start of reserve area. */
char* _IO_buf_end; /* End of reserve area. */
} _IO_FILE;
int
_IO_new_file_overflow (_IO_FILE *f, int ch)
{
if (f->_IO_read_ptr == f->_IO_buf_end)
f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
f->_IO_write_ptr = f->_IO_read_ptr;
f->_IO_write_base = f->_IO_write_ptr;
f->_IO_write_end = f->_IO_buf_end;
f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
return (unsigned char) ch;
}
results in this generated code:
_IO_new_file_overflow:
ld 10,8(3)
ld 8,64(3)
mr 9,3
cmpld 7,10,8
beq 7,.L2
ld 7,16(3)
mtvsrdd 0,8,10
li 8,24
rlwinm 3,4,0,0xff
mtvsrdd 12,10,7
li 10,40
std 7,8(9)
stxvx 12,9,8
stxvx 0,9,10
blr
.p2align 4,,15
.L2:
ld 10,56(3)
mr 7,10
mtvsrdd 0,8,10
std 10,16(3)
li 8,24
rlwinm 3,4,0,0xff
mtvsrdd 12,10,7
li 10,40
std 7,8(9)
stxvx 12,9,8
stxvx 0,9,10
blr
This is an improvement over gcc6 which used multiple mtvsrd plus xxpermdi to
accomplish the same thing. However it seems to me it would still be better just
to generate 4 std instructions. We then get rid of 2 mtvsrdd, 2 stxvx, and 2 li
instructions.
>From gcc-bugs-return-563027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 18:38:25 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-563026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 18:29:22 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80696] New: [8 Regression] New Failures to do with matmul
Date: Tue, 09 May 2017 18:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80696
Bug ID: 80696
Summary: [8 Regression] New Failures to do with matmul
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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There are some new failures with matmul with -m32, reported e.g. at
https://gcc.gnu.org/ml/fortran/2017-05/msg00027.html (testsuite
failures) and https://gcc.gnu.org/ml/fortran/2017-05/msg00026.html
(SPEC failure).
These failures are _really_ strange. One of the failing test
cases is generic_20.f90.
$ gfortran -O0 generic_20.f90
$ ./a.out
$ gfortran -m32 -O0 generic_20.f90
$ ./a.out
-559038737
0 2.000000
There isn't even a write statement in the patch, so this
points towards some kind of memory corruption, so it
is probably not the front end patch.
Investigating.
>From gcc-bugs-return-563028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 18:38:42 2017
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-563029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 18:39:49 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
Date: Tue, 09 May 2017 19:10:00 -0000
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--- Comment #1 from acsawdey at gcc dot gnu.org ---
Note that compiling with -fno-tree-slp-vectorize results in this much better
code:
_IO_new_file_overflow:
ld 9,8(3)
ld 10,64(3)
cmpld 7,9,10
beq 7,.L2
ld 8,16(3)
std 9,40(3)
std 9,32(3)
std 10,48(3)
std 8,8(3)
std 8,24(3)
rlwinm 3,4,0,0xff
blr
.p2align 4,,15
.L2:
ld 9,56(3)
std 10,48(3)
mr 8,9
std 9,16(3)
std 9,40(3)
std 9,32(3)
std 8,8(3)
std 8,24(3)
rlwinm 3,4,0,0xff
blr
>From gcc-bugs-return-563034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 19:11:51 2017
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Subject: [Bug c/35443] [4.2/4.3/4.4 regression] Completely broken diagnostic with bind_expr
Date: Tue, 09 May 2017 19:11:00 -0000
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Bug 35443 depends on bug 35441, which changed state.
Bug 35441 Summary: pretty-printer cannot handle some expressions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35441
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
>From gcc-bugs-return-563030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 19:10:02 2017
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Subject: [Bug c/35441] pretty-printer cannot handle some expressions
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--- Comment #11 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Author: reichelt
Date: Tue May 9 19:09:22 2017
New Revision: 247810
URL: https://gcc.gnu.org/viewcvs?rev=247810&root=gcc&view=rev
Log:
PR c/35441
* c-pretty-print.c (c_pretty_printer::expression): Handle MAX_EXPR,
MIN_EXPR, EXACT_DIV_EXPR, RDIV_EXPR, LROTATE_EXPR, RROTATE_EXPR.
(c_pretty_printer::postfix_expression): Handle MAX_EXPR, MIN_EXPR.
(c_pretty_printer::multiplicative_expression): Handle EXACT_DIV_EXPR,
RDIV_EXPR.
(pp_c_shift_expression): Handle LROTATE_EXPR, RROTATE_EXPR.
* gcc.dg/pr35441.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr35441.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-pretty-print.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/35441] pretty-printer cannot handle some expressions
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Fixed on trunk for GCC 8.
>From gcc-bugs-return-563032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 19:11:50 2017
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Subject: [Bug c/35442] [4.2/4.3/4.4 Regression] Completely broken diagnostic with view_convert_expr
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Bug 35441 Summary: pretty-printer cannot handle some expressions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35441
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-563033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 19:11:51 2017
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Subject: [Bug c/35742] [4.3 regression] Broken diagnostic: 'goto_expr' not supported by pp_c_expression
Date: Tue, 09 May 2017 20:23:00 -0000
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Bug 35742 depends on bug 35441, which changed state.
Bug 35441 Summary: pretty-printer cannot handle some expressions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35441
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-563035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 20:23:18 2017
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Subject: [Bug c++/80670] Member specialization of alias declaration from different namespace
Date: Tue, 09 May 2017 20:27:00 -0000
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TC <rs2740 at gmail dot com> changed:
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CC| |rs2740 at gmail dot com
--- Comment #2 from TC <rs2740 at gmail dot com> ---
namespace A {
template<class> class X { struct P; };
}
namespace B {
using Y = A::X<int>;
}
namespace A {
template<> struct B::Y::P {};
}
main.cpp:10:29: error: declaration of 'struct A::X<int>::P' in namespace 'A'
which does not enclose 'using Y = class A::X<int>'
template<> struct B::Y::P {};
>From gcc-bugs-return-563037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 20:38:22 2017
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Subject: [Bug c++/66297] [C++14] [DR 1684] constexpr non-static member functions of non-literal types
Date: Tue, 09 May 2017 20:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66297
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue May 9 20:37:44 2017
New Revision: 247813
URL: https://gcc.gnu.org/viewcvs?rev=247813&root=gcc&view=rev
Log:
PR c++/66297, DR 1684 - literal class and constexpr member fns
* constexpr.c (is_valid_constexpr_fn): Only complain about
non-literal enclosing class in C++11.
* class.c (finalize_literal_type_property): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-dr1684.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-data1.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-diag1.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-diag3.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-memfn1.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-neg1.C
>From gcc-bugs-return-563036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 20:27:02 2017
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Subject: [Bug c++/66297] [C++14] [DR 1684] constexpr non-static member functions of non-literal types
Date: Tue, 09 May 2017 20:38:00 -0000
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Freddie Chopin from comment #5)
> Any chance for merging the fix for GCC 7? It would be a pity to wait for a
> fixed release for another year...
I'll put it in 7.2.
>From gcc-bugs-return-563038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 20:38:33 2017
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Subject: [Bug c++/70979] [C++14] g++ falsely accepts constexpr function returning a lambda
Date: Tue, 09 May 2017 20:49:00 -0000
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--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue May 9 20:37:51 2017
New Revision: 247814
URL: https://gcc.gnu.org/viewcvs?rev=247814&root=gcc&view=rev
Log:
PR c++/70979 - literal class and closure types
* class.c (finalize_literal_type_property): Handle closures
specifically.
(explain_non_literal_class): Likewise.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/testsuite/g++.dg/cpp1z/constexpr-lambda15.C
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/79136] read outside of buffer in char* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<unsigned char const*, char*>(unsigned char const*, unsigned char const*, char*) (stl_algobase.h)
Date: Tue, 09 May 2017 20:56:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Are you sure this is not just a bug in Draco's use of the std::lib?
I'll try checking out the code and building it with _GLIBCXX_DEBUG defined, and
see if I can reproduce the crash.
>From gcc-bugs-return-563040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 20:56:16 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/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
Date: Tue, 09 May 2017 21:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79311
--- Comment #8 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue May 9 20:55:38 2017
New Revision: 247818
URL: https://gcc.gnu.org/viewcvs?rev=247818&root=gcc&view=rev
Log:
2017-05-09 Janus Weil <janus@gcc.gnu.org>
PR fortran/79311
* resolve.c (gfc_resolve_finalizers): Ensure that derived-type
components have a their finalizers resolved, also if the superordinate
type itself has a finalizer.
2017-05-09 Janus Weil <janus@gcc.gnu.org>
PR fortran/79311
* gfortran.dg/finalize_32.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/finalize_32.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
Date: Tue, 09 May 2017 21:02:00 -0000
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #9 from janus at gcc dot gnu.org ---
Fixed on 8-trunk with r247818. Closing.
Thanks for the report!
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Subject: [Bug fortran/37336] [F03] Finish derived-type finalization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37336
Bug 37336 depends on bug 79311, which changed state.
Bug 79311 Summary: [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79311
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug target/68163] GCC on power8 does not issue the stxsspx instruction on power8
Date: Tue, 09 May 2017 22:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68163
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue May 9 21:25:23 2017
New Revision: 247819
URL: https://gcc.gnu.org/viewcvs?rev=247819&root=gcc&view=rev
Log:
[gcc]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/68163
* config/rs6000/rs6000.md (f32_lr): Delete mode attributes that
are now unused after splitting mov{sf,sd}_hardfloat.
(f32_lr2): Likewise.
(f32_lm): Likewise.
(f32_lm2): Likewise.
(f32_li): Likewise.
(f32_li2): Likewise.
(f32_lv): Likewise.
(f32_sr): Likewise.
(f32_sr2): Likewise.
(f32_sm): Likewise.
(f32_sm2): Likewise.
(f32_si): Likewise.
(f32_si2): Likewise.
(f32_sv): Likewise.
(f32_dm): Likewise.
(f32_vsx): Likewise.
(f32_av): Likewise.
(mov<mode>_hardfloat): Split into separate movsf and movsd pieces.
For movsf, order stores so the VSX stores occur before the GPR
store which encourages the register allocator to use a traditional
FPR instead of a GPR. For movsd, order the stores so that the GPR
store comes before the VSX stores to allow the power6 to work.
This is due to the power6 not having a 32-bit integer store
instruction from a FPR.
(movsf_hardfloat): Likewise.
(movsd_hardfloat): Likewise.
[gcc/testsuite]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/68163
* gcc.target/powerpc/pr68163.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr68163.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
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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/80697] New: On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
Date: Tue, 09 May 2017 22:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80697
Bug ID: 80697
Summary: On PowerPC, the spec 2006 benchmark milc had a 5.6%
regression under GCC 7.1 compared to GCC 6.3.
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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After GCC 7.1 came out, I ran the spec 2006 benchmark suite. The milc
benchmark had a 5.6% regression with GCC 7.1 compared to GCC 6.3.
In particular, the function mult_adj_su3_mat_vec was 48% slower with GCC 7.1
compared to GCC 6.3.
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Subject: [Bug libstdc++/79136] read outside of buffer in char* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<unsigned char const*, char*>(unsigned char const*, unsigned char const*, char*) (stl_algobase.h)
Date: Tue, 09 May 2017 22:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79136
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-05-09
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't reproduce this, every time I run the draco_encoder executable with the
test input (both from here and PR 79135) it says:
$ ./draco_encoder -i ../draco/test030
Failed loading the input mesh.
I've tried a debug build, and a relwithdebinfo build, with libstdc++ debug
mode, with Asan ... it's teh same every time.
Please provide a reproducable testcase or proper instructions for reproducing
this, and ideally with an actual release. I have no idea what snapshot of GCC
you're using, 6.2.1 is not a release (and that's why you were asked to read
https://gcc.gnu.org/bugs and provide the info requested there, including the
output of 'gcc -v').
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From: "wgh at beyondunreal dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/59000] lto can't merge user-defined weak builtin functions
Date: Tue, 09 May 2017 22:50:00 -0000
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wgh at beyondunreal dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wgh at beyondunreal dot com
--- Comment #6 from wgh at beyondunreal dot com ---
Same problem as above when compiling qemu with lto with GCC-5.4.0.
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Subject: [Bug libstdc++/79135] null pointer dereference in std::_Bit_reference::operator=(bool) (stl_bvector.h:87)
Date: Tue, 09 May 2017 22:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See PR 79136 comment 2
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Subject: [Bug target/79203] Update PowerPC double->int conversions to know about -mvsx-small-integer
Date: Tue, 09 May 2017 23:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79203
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue May 9 23:49:37 2017
New Revision: 247820
URL: https://gcc.gnu.org/viewcvs?rev=247820&root=gcc&view=rev
Log:
[gcc]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
- copied unchanged from r247808,
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
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Subject: [Bug target/79202] On Power8, consider using vupkhsw/xxpermdi to sign extend an int in a vector register instead of mfvsrwz/mtvsrwa
Date: Tue, 09 May 2017 23:50:00 -0000
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--- Comment #7 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue May 9 23:49:37 2017
New Revision: 247820
URL: https://gcc.gnu.org/viewcvs?rev=247820&root=gcc&view=rev
Log:
[gcc]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
- copied unchanged from r247808,
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
>From gcc-bugs-return-563048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 22:50:57 2017
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Subject: [Bug libstdc++/79136] read outside of buffer in char* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<unsigned char const*, char*>(unsigned char const*, unsigned char const*, char*) (stl_algobase.h)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79136
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Be sure to include which version of the draco code to check out; master?
>From gcc-bugs-return-563051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 09 23:50:19 2017
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Subject: [Bug target/79038] Improve PowerPC ISA 3.0 conversion between integers and hardware _Float128
Date: Tue, 09 May 2017 23:58:00 -0000
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--- Comment #8 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue May 9 23:49:37 2017
New Revision: 247820
URL: https://gcc.gnu.org/viewcvs?rev=247820&root=gcc&view=rev
Log:
[gcc]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* config/rs6000/rs6000.md (u code attribute): Add FIX and
UNSIGNED_FIX.
(extendsi<mode>2): Add support for doing sign extension via
VUPKHSW and XXPERMDI if the value is in Altivec registers and we
don't have ISA 3.0 instructions.
(extendsi<mode>2 splitter): Likewise.
(fix_trunc<mode>si2): If we are at ISA 2.07 (VSX small integer),
generate the normal insns since SImode can now go in vector
registers. Disallow the special UNSPECs needed for previous
machines to hide SImode being used. Add new insns
fctiw{,w}_<mode>_smallint if SImode can go in vector registers.
(fix_trunc<mode>si2_stfiwx): Likewise.
(fix_trunc<mode>si2_internal): Likewise.
(fixuns_trunc<mode>si2): Likewise.
(fixuns_trunc<mode>si2_stfiwx): Likewise.
(fctiw<u>z_<mode>_smallint): Likewise.
(fctiw<u>z_<mode>_mem): New combiner pattern to prevent conversion
of floating point to 32-bit integer from doing a direct move to
the GPR registers to do a store.
(fctiwz_<mode>): Break long line.
[gcc/testsuite]
2017-05-09 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from mainline
2017-05-05 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79038
PR target/79202
PR target/79203
* gcc.target/powerpc/ppc-round3.c: New test.
* gcc.target/powerpc/ppc-round2.c: Update expected code.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
- copied unchanged from r247808,
trunk/gcc/testsuite/gcc.target/powerpc/ppc-round3.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/ppc-round2.c
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Subject: [Bug libstdc++/79136] read outside of buffer in char* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<unsigned char const*, char*>(unsigned char const*, unsigned char const*, char*) (stl_algobase.h)
Date: Tue, 09 May 2017 23:59:00 -0000
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Brian 'geeknik' Carpenter <brian.carpenter at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
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Subject: [Bug libstdc++/79135] null pointer dereference in std::_Bit_reference::operator=(bool) (stl_bvector.h:87)
Date: Wed, 10 May 2017 02:30:00 -0000
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Brian 'geeknik' Carpenter <brian.carpenter at gmail dot com> changed:
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>From gcc-bugs-return-563054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 02:30:04 2017
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 06:13:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-10
Summary|Ada x32 multilib build |[7/8 Regression] Ada x32
|failure for a-cfinve.ads |multilib build failure for
| |a-cfinve.ads
Ever confirmed|0 |1
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
We need something similar to
commit 5821cbd2fa002acf67add968862c6d4fe847fa89
Author: krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Apr 4 11:45:37 2017 +0000
[Ada][S/390] Fix Memory_Size definition.
-m31 -mzarch uses 64 as word size instead of 32. This must not affect
the Address type definition which is based on Memory_Size.
gcc/ada/ChangeLog:
2017-04-04 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* system-linux-s390.ads: Use Long_Integer'Size to define
Memory_Size.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@246678
138bc75d-0d04-0410-961f-82ee72b054a4
Please try
diff --git a/gcc/ada/system-linux-x86.ads b/gcc/ada/system-linux-x86.ads
index 22a212e..533d94e 100644
--- a/gcc/ada/system-linux-x86.ads
+++ b/gcc/ada/system-linux-x86.ads
@@ -70,7 +70,7 @@ package System is
Storage_Unit : constant := 8;
Word_Size : constant := Standard'Word_Size;
- Memory_Size : constant := 2 ** Word_Size;
+ Memory_Size : constant := 2 ** Long_Integer'Size;
-- Address comparison
>From gcc-bugs-return-563055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 06:13:39 2017
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80698] New: new unreachable code implementation possible?
Date: Wed, 10 May 2017 06:43:00 -0000
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Bug ID: 80698
Summary: new unreachable code implementation possible?
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Hello
I know -Wunreachable-code implementation was removed in 2010, it would be great
to have again.
Simple example below, had some code after a "break" which then never ran, but
didn't spot it until it was reviewed by a programmer
// gcc -O3 -Wall -Werror main2.c -o main2
#include <stdio.h>
int main (void)
{
for (;;)
{
break;
printf("Hello\n");
}
return 0;
}
Happy to pay a bug bounty $200 for committed implementation!
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Wed, 10 May 2017 07:07:00 -0000
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--- Comment #16 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> With these lines added to my configure line I have been able to bootstrap
> revision r247792. However this addition was not necessary before and I don't
> think it is the end user responsibility to do the addition.
Right. Can you make the necessary modifications to the toplevel configure.ac
for Darwin (grep for -static-libgcc) and post them on gcc-patches@?
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Subject: [Bug fortran/80696] [8 Regression] New Failures to do with matmul
Date: Wed, 10 May 2017 07:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80696
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-10
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Patch at https://gcc.gnu.org/ml/fortran/2017-05/msg00045.html
(and https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00729.html )
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Subject: [Bug rtl-optimization/80474] ipa-cp wrongly adding LO(symbol) twice
Date: Wed, 10 May 2017 07:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
Status|WAITING |UNCONFIRMED
CC| |ebotcazou at gcc dot gnu.org,
| |matthew.fortune at imgtec dot com
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>From gcc-bugs-return-563059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:13:59 2017
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Subject: [Bug testsuite/80694] [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
Date: Wed, 10 May 2017 07:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
r247780 reverted a bogus change, r247794 was supposed to fix it. So - fixed?
>From gcc-bugs-return-563060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:18:49 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80698] new unreachable code implementation possible?
Date: Wed, 10 May 2017 07:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
Date: Wed, 10 May 2017 07:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |powerpc64le-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks good on x86_64 (haswell):
http://gcc.opensuse.org/SPEC/CFP/sb-czerny-head-64-2006/433_milc_big.png
What options did you use and what sub-architecture were you testing on?
Which variant of the function gets used? I see three in various #if conditions
(including one "rs6000 version").
>From gcc-bugs-return-563062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:23:20 2017
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Subject: [Bug fortran/80696] [8 Regression] New Failures to do with matmul
Date: Wed, 10 May 2017 07:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |8.0
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>From gcc-bugs-return-563063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:26:58 2017
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From: "gingold at adacore dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Wed, 10 May 2017 07:31:00 -0000
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--- Comment #17 from Tristan Gingold <gingold at adacore dot com> ---
On 09/05/2017 17:41, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #15 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>> You should add:
>>
>> --with-stage1-ldflags=-static-libstdc++
>> --with-boot-ldflags=-static-libstdc++
>>
>> to your configure line.
>
> With these lines added to my configure line I have been able to bootstrap
> revision r247792. However this addition was not necessary before and I don't
> think it is the end user responsibility to do the addition.
This failure is simply a consequence of broken libgcc on Darwin: this
libgcc is not able to get exception table addresses and therefore cannot
propagate exceptions.
Any program (that uses exceptions) and linked with -static-libgcc on
Darwin will also fail.
>From gcc-bugs-return-563065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:35:16 2017
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 07:35:00 -0000
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--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
See also PR80117.
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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/80695] gratuitous use of stxvx to store multiple pointers
Date: Wed, 10 May 2017 07:35:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
On x86_64 vectorization is not profitable, likely due to the higher cost of
unaligned vector stores? But yes, I can see that vectorizing it as
_24 = VIEW_CONVERT_EXPR<long unsigned int>(_2);
_25 = VIEW_CONVERT_EXPR<long unsigned int>(prephitmp_21);
_26 = VIEW_CONVERT_EXPR<long unsigned int>(prephitmp_21);
_27 = VIEW_CONVERT_EXPR<long unsigned int>(prephitmp_19);
vect_cst__28 = {_27, _26, _25, _24};
vectp.6_29 = &f_8(D)->_IO_read_base;
MEM[(char * *)vectp.6_29] = vect_cst__28;
isn't good though the cost modeling looks reasonable (vector construction from
scalar cost plus unaligned store cost). Now on x86_64 we construct the vector
via the stack for some reason:
_IO_new_file_overflow:
.LFB0:
.cfi_startproc
movq 8(%rdi), %rax
movq %rax, -16(%rsp)
movq 64(%rdi), %rax
cmpq %rax, -16(%rsp)
je .L2
movq 16(%rdi), %xmm0
.L3:
movq %xmm0, 8(%rdi)
movhps -16(%rsp), %xmm0
movups %xmm0, 24(%rdi)
movq -16(%rsp), %xmm0
movq %rax, -16(%rsp)
movhps -16(%rsp), %xmm0
movzbl %sil, %eax
movups %xmm0, 40(%rdi)
ret
.L2:
movq 56(%rdi), %rcx
movq %rcx, -16(%rsp)
movq -16(%rsp), %xmm0
punpcklqdq %xmm0, %xmm0
movups %xmm0, 8(%rdi)
movq -16(%rsp), %xmm0
jmp .L3
in the end it's a matter of properly cost-modelling this and not making a mess
out of it during RTL expansion / optimization.
>From gcc-bugs-return-563066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:35:41 2017
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Subject: [Bug target/80689] 128 loads generated for structure copying with gcc 7.1.0 and leads to STLF stalls in avx2 targets.
Date: Wed, 10 May 2017 07:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |uros at gcc dot gnu.org
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
That's interesting. Most heavy lifting of block copying happens in the
middle-end, so doing member-wise copying would need to be implemented there
(generally GIMPLE is too lax to always allow this, it just requires same
object sizes on LHS and RHS for aggregate copies, but where types match
this could be a heuristic that will likely avoid STLF issues). It would need
quite some benchmarking on when this is reasonable (factoring in store queue
size -- for large aggregates it's unlikely a win).
>From gcc-bugs-return-563067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:36:13 2017
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Subject: [Bug lto/80699] New: multiple prevailing defs with -flto and -Wl,--wrap
Date: Wed, 10 May 2017 07:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80699
Bug ID: 80699
Summary: multiple prevailing defs with -flto and -Wl,--wrap
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
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markus@x4 /tmp % cat test.c
void foo() {}
markus@x4 /tmp % cat test_warp.c
extern void foo();
void __wrap_foo() { foo(); };
int main() {}
markus@x4 /tmp % gcc -Wl,--wrap=foo test.c test_warp.c
markus@x4 /tmp % clang -flto -Wl,--wrap=foo test.c test_warp.c
markus@x4 /tmp % gcc -flto -Wl,--wrap=foo test.c test_warp.c
lto1: fatal error: multiple prevailing defs for ‘foo’
compilation terminated.
lto-wrapper: fatal error: /usr/x86_64-pc-linux-gnu/gcc-bin/7.1.1/gcc returned 1
exit status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../x86_64-pc-linux-gnu/bin/ld:
fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-563068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:38:10 2017
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Subject: [Bug lto/80699] multiple prevailing defs with -flto and -Wl,--wrap
Date: Wed, 10 May 2017 07:38:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 51859.
*** This bug has been marked as a duplicate of bug 51859 ***
>From gcc-bugs-return-563069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:38:10 2017
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Subject: [Bug lto/51859] Linker option effects not reflected in symbol resolution file
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 80699 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-563070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:39:32 2017
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Subject: [Bug lto/80699] multiple prevailing defs with -flto and -Wl,--wrap
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note The main reason why I marked it as a dup of bug 51859, is because bug
51887 was marked as one.
>From gcc-bugs-return-563074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:05 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80167] [6 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
Date: Wed, 10 May 2017 07:46:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:04 2017
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Subject: [Bug tree-optimization/80170] SLP vectorization creates aligned access
Date: Wed, 10 May 2017 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.4.
>From gcc-bugs-return-563076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:08 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80122] __builtin_va_arg_pack() and __builtin_va_arg_pack_len() does not work correctly
Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80122
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:19 2017
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Subject: [Bug tree-optimization/80167] [6 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80167
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail| |6.3.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.4.
>From gcc-bugs-return-563078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:08 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODAwNzVdIFs1LzYgUmVncmVzc2lvbl0gSUNFOiAic3RhdGVt?= =?UTF-8?B?ZW50IG1hcmtlZCBmb3IgdGhyb3csIGJ1dCBkb2VzbuKAmXQiIHdpdGggLWZu?= =?UTF-8?B?b24tY2FsbC1leGNlcHRpb25z?Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80075
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:03 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80170] SLP vectorization creates aligned access
Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80170
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.4.
>From gcc-bugs-return-563071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:40:24 2017
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Subject: [Bug lto/51859] Linker option effects not reflected in symbol resolution file
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51859
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Clang handles it fine BTW:
markus@x4 /tmp % cat test.c
void foo() {}
markus@x4 /tmp % cat test_warp.c
extern void foo();
void __wrap_foo() { foo(); };
int main() {}
markus@x4 /tmp % gcc -Wl,--wrap=foo test.c test_warp.c
markus@x4 /tmp % clang -flto -Wl,--wrap=foo test.c test_warp.c
markus@x4 /tmp % gcc -flto -Wl,--wrap=foo test.c test_warp.c
lto1: fatal error: multiple prevailing defs for ‘foo’
compilation terminated.
lto-wrapper: fatal error: /usr/x86_64-pc-linux-gnu/gcc-bin/7.1.1/gcc returned 1
exit status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../x86_64-pc-linux-gnu/bin/ld:
fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
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Subject: [Bug tree-optimization/80171] [5 Regression] ICE (Segmentation fault) with optimization
Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80171
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:57 2017
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Subject: [Bug tree-optimization/59859] [meta-bug] GRAPHITE issues
Date: Wed, 10 May 2017 07:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59859
Bug 59859 depends on bug 80113, which changed state.
Bug 80113 Summary: [6 Regression] ICE in set_var_live_on_entry at tree-ssa-live.c:1018
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80113
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug plugins/80094] GCC plugin hash table corruption on hash table expansion (>10 plugins) on GCC 4.5+
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80094
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:06 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80113] [6 Regression] ICE in set_var_live_on_entry at tree-ssa-live.c:1018
Date: Wed, 10 May 2017 07:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80113
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:44:41 2017
New Revision: 247826
URL: https://gcc.gnu.org/viewcvs?rev=247826&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-17 Richard Biener <rguenther@suse.de>
PR middle-end/80075
* tree-eh.c (stmt_could_throw_1_p): Only handle gimple assigns.
Properly verify the LHS before the RHS possibly claims to be
handled.
(stmt_could_throw_p): Hande gimple conds fully here. Clobbers
do not throw.
* g++.dg/torture/pr80075.C: New testcase.
2017-03-21 Brad Spengler <spender@grsecurity.net>
PR plugin/80094
* plugin.c (htab_hash_plugin): New function.
(add_new_plugin): Use it and adjust.
(parse_plugin_arg_opt): Adjust.
(init_one_plugin): Likewise.
2017-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80075.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr80167.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/graphite-isl-ast-to-gimple.c
branches/gcc-6-branch/gcc/plugin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-eh.c
branches/gcc-6-branch/gcc/tree-inline.c
branches/gcc-6-branch/gcc/tree-inline.h
branches/gcc-6-branch/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-563083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:47:21 2017
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Subject: [Bug plugins/80094] GCC plugin hash table corruption on hash table expansion (>10 plugins) on GCC 4.5+
Date: Wed, 10 May 2017 07:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80094
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail| |6.3.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 6.4.
>From gcc-bugs-return-563085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:54:26 2017
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Wed, 10 May 2017 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80222
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:53:45 2017
New Revision: 247827
URL: https://gcc.gnu.org/viewcvs?rev=247827&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-inline.h
branches/gcc-5-branch/gcc/tree-ssa-loop-ivopts.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80122] __builtin_va_arg_pack() and __builtin_va_arg_pack_len() does not work correctly
Date: Wed, 10 May 2017 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80122
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:53:45 2017
New Revision: 247827
URL: https://gcc.gnu.org/viewcvs?rev=247827&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-inline.h
branches/gcc-5-branch/gcc/tree-ssa-loop-ivopts.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80334] [5 Regression] Segfault when taking address of copy of unaligned struct
Date: Wed, 10 May 2017 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80334
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:53:45 2017
New Revision: 247827
URL: https://gcc.gnu.org/viewcvs?rev=247827&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-inline.h
branches/gcc-5-branch/gcc/tree-ssa-loop-ivopts.c
>From gcc-bugs-return-563081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:46:57 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/80113] [6 Regression] ICE in set_var_live_on_entry at tree-ssa-live.c:1018
Date: Wed, 10 May 2017 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80113
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.3.1
Resolution|--- |FIXED
Known to fail| |6.3.0
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-563087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:54:28 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80539] [5 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly"
Date: Wed, 10 May 2017 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80539
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 07:53:45 2017
New Revision: 247827
URL: https://gcc.gnu.org/viewcvs?rev=247827&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/80122
* tree-inline.c (copy_bb): Do not expans va-arg packs or
va_arg_pack_len when the inlined call stmt requires pack
expansion itself.
* tree-inline.h (struct copy_body_data): Make call_stmt a gcall *.
* gcc.dg/torture/pr80122.c: New testcase.
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr80222.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr80334.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80122.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-chrec.c
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-inline.h
branches/gcc-5-branch/gcc/tree-ssa-loop-ivopts.c
>From gcc-bugs-return-563084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 07:54:07 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80539] [5 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly"
Date: Wed, 10 May 2017 07:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
Known to fail|5.4.1 |5.4.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Wed, 10 May 2017 07:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
Known to fail| |5.4.0
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80334] [5 Regression] Segfault when taking address of copy of unaligned struct
Date: Wed, 10 May 2017 07:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
Known to fail| |5.4.0
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80122] __builtin_va_arg_pack() and __builtin_va_arg_pack_len() does not work correctly
Date: Wed, 10 May 2017 08:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
Known to fail| |5.4.0
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-563092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 08:21:47 2017
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Subject: [Bug rtl-optimization/80700] New: [8 Regression] ICE: Bus error (on SPE target)
Date: Wed, 10 May 2017 08:23:00 -0000
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Bug ID: 80700
Summary: [8 Regression] ICE: Bus error (on SPE target)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
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Reporter: asolokha at gmx dot com
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Target: powerpc-e500v2-linux-gnuspe
gcc-8.0.0-alpha20170507 snapshot ICEs when compiling the following snippet,
reduced from the original testcase in PR71012, w/ -O2, -O3, or -Ofast:
typedef char k6 __attribute__ ((vector_size(16)));
typedef int tp __attribute__ ((vector_size(16)));
k6 ap;
tp r3;
void
i5 (k6 x5, k6 nr, int gx)
{
tp cl = { 1, 1 };
while (gx < 1)
{
ap = x5;
r3 += gx;
r3 *= cl;
ap <<= 1;
x5 <<= nr;
++gx;
}
}
% powerpc-e500v2-linux-gnuspe-gcc-8.0.0-alpha20170507 -w -O2 -c fiwreogz.c
fiwreogz.c: In function 'i5':
fiwreogz.c:21:1: internal compiler error: Bus error
}
^
0xc49b79 crash_signal
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/toplev.c:337
0xb9161c constrain_operands(int, unsigned long)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/recog.c:2583
0xb92204 extract_constrain_insn(rtx_insn*)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/recog.c:2212
0xa840df check_rtl
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/lra.c:2128
0xa88d07 lra(_IO_FILE*)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/lra.c:2546
0xa34e30 do_reload
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/ira.c:5472
0xa34e30 execute
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/ira.c:5656
The snippet builds fine w/ -mno-spe.
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Subject: [Bug rtl-optimization/80700] [8 Regression] ICE: Bus error (on SPE target)
Date: Wed, 10 May 2017 08:25:00 -0000
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--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
==15430== Invalid read of size 1
==15430== at 0xB9161C: constrain_operands(int, unsigned long) (recog.c:2583)
==15430== by 0xB92204: extract_constrain_insn(rtx_insn*) (recog.c:2212)
==15430== by 0xA840DF: check_rtl(bool) (lra.c:2128)
==15430== by 0xA88D07: lra(_IO_FILE*) (lra.c:2546)
==15430== by 0xA34E30: do_reload (ira.c:5472)
==15430== by 0xA34E30: (anonymous
namespace)::pass_reload::execute(function*) (ira.c:5656)
==15430== by 0xB49315: execute_one_pass(opt_pass*) (passes.c:2467)
==15430== by 0xB49D07: execute_pass_list_1(opt_pass*) (passes.c:2556)
==15430== by 0xB49D19: execute_pass_list_1(opt_pass*) (passes.c:2557)
==15430== by 0xB49DAB: execute_pass_list(function*, opt_pass*)
(passes.c:2567)
==15430== by 0x793BE9: cgraph_node::expand() (cgraphunit.c:2042)
==15430== by 0x7958DB: expand_all_functions (cgraphunit.c:2178)
==15430== by 0x7958DB: symbol_table::compile() (cgraphunit.c:2535)
==15430== by 0x797F52: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2625)
==15430== Address 0xafafaf010000028a is not stack'd, malloc'd or (recently)
free'd
>From gcc-bugs-return-563094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 08:25:38 2017
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From: "kloedej at knmi dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
Date: Wed, 10 May 2017 08:34:00 -0000
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--- Comment #2 from Jos de Kloe <kloedej at knmi dot nl> ---
(In reply to Dominique d'Humieres from comment #1)
> Why do you think this a bug in gfortran?
>
> The code compiles if you remove 'implicit none'. With it you have to define
> 'keylen' before using it, as in you second test.
We had the impression our code was correct since it compiles without problem
with pgf90 and ifort and older gfortran versions. I understand that extra
checks are added when the compiler evolves, and that the democratic argument is
maybe not applicable here, so if you think there is a rule in the fortran
standard that forbids this way of coding, feel free to point it out and we can
close the bug.
On the other hand, the main misunderstanding here I think is what defines the
order of the definition of subroutine parameters. Is it the parameter list in
the subroutine statement or is it the individual type declarations that follow
it? It seems most logical in my eyes if the parameter list is the one that
defines order of parameter definitions but I might be wrong. Is this defined in
the fortran specification at all?
I tried to find it in the "Fortran 95 Standard, final draft" document (from
https://gcc.gnu.org/wiki/GFortranStandards), but the only thing I found was on
page 230, lines 25-28. Here it only is stated that the length specification
must be present, but nothing is said about the order in the dummy argument
list.
Finally I would not recommend coding fortran without 'implicit none' to anyone,
that's a disaster waiting to happen.
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80145] [c++1y] ICE after failed return type deduction
Date: Wed, 10 May 2017 08:35:00 -0000
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--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed May 10 08:34:02 2017
New Revision: 247828
URL: https://gcc.gnu.org/viewcvs?rev=247828&root=gcc&view=rev
Log:
/cp
2017-05-10 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/80145
* decl.c (finish_function): To improve error recovery, change the
logic for calling apply_deduced_return_type.
/testsuite
2017-05-10 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/80145
* g++.dg/cpp1y/auto-fn37.C: New.
* g++.dg/cpp1y/auto-fn38.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/auto-fn37.C
trunk/gcc/testsuite/g++.dg/cpp1y/auto-fn38.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-563096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 08:35:26 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80145] [c++1y] ICE after failed return type deduction
Date: Wed, 10 May 2017 09:07:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80700] [8 Regression] ICE: Bus error (on SPE target)
Date: Wed, 10 May 2017 09:23:00 -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-563098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 09:23:33 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80698] new unreachable code implementation possible?
Date: Wed, 10 May 2017 09:25:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |46476
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Don't know if I want to mark this as a dup of bug 46476 or not.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46476
[Bug 46476] Missing Warning about unreachable code after return
>From gcc-bugs-return-563099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 09:25:02 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/71012] ICE: in expand_expr_real_2, at expr.c:9348 when compiling stress-ng
Date: Wed, 10 May 2017 09:41:00 -0000
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--- Comment #4 from Arseny Solokha <asolokha at gmx dot com> ---
int mw;
int
j3 (int cn)
{
const int l7 = 0;
int wz;
for (wz = l7; wz < l7 + 3; ++wz)
while (mw != 0)
{
cn ^= -(wz == l7);
++mw;
}
return cn;
}
actually leads to ICE w/ -O2 (-O3, -Ofast) -ftree-vectorize all the way from
gcc-8.0.0-alpha20170507 snapshot down to 4.9:
% powerpc-e500v2-linux-gnuspe-gcc-8.0.0-alpha20170507 -O2 -ftree-vectorize -c
ndknofut.c
ndknofut.c: In function 'j3':
ndknofut.c:12:12: internal compiler error: in expand_expr_real_2, at
expr.c:9069
cn ^= -(wz == l7);
~~~^~~~~~~~~~~~~~
0x8a1b2a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/expr.c:9069
0x74e4de expand_gimple_stmt_1
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/cfgexpand.c:3676
0x74e4de expand_gimple_stmt
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/cfgexpand.c:3737
0x7510e7 expand_gimple_basic_block
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/cfgexpand.c:5744
0x7576df execute
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-8.0.0_alpha20170507/work/gcc-8-20170507/gcc/cfgexpand.c:6357
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80698] new unreachable code implementation possible?
Date: Wed, 10 May 2017 09:41:00 -0000
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Jon Grant <jg at jguk dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jon Grant <jg at jguk dot org> ---
You're right Andrew, it is a dup.
*** This bug has been marked as a duplicate of bug 46476 ***
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Subject: [Bug c++/46476] Missing Warning about unreachable code after return
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Jon Grant <jg at jguk dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jg at jguk dot org
--- Comment #8 from Jon Grant <jg at jguk dot org> ---
*** Bug 80698 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-563102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 09:42:49 2017
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Subject: [Bug c++/46476] Missing Warning about unreachable code after return
Date: Wed, 10 May 2017 09:49:00 -0000
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--- Comment #9 from Jon Grant <jg at jguk dot org> ---
Happy to pay 200 USD bounty on a committed implementation for
-Wunreachable-code examples. Even just instructions just after "return" or
"break" etc
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Subject: [Bug middle-end/79732] [5 Regression] ICE in set_ssa_default_def, at tree-dfa.c:327
Date: Wed, 10 May 2017 10:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80701
Bug ID: 80701
Summary: gfortran ignores dead code after return statement
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gustavo.hime at mpimet dot mpg.de
Target Milestone: ---
Created attachment 41336
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41336&action=edit
bug.f90
Compiling the attached code with "gfortran -c bug.f90" generates no warnings.
However, if one inspects the object file, there is no mention of the
"undefined" symbol that is used in the code. If one comments out the RETURN
statement, it still compiles without warnings, but the symbol is there. This
behaviour happens independently of the value of -On, both on 5.2.0 and 6.2.0.
For the record, NAG and Intel behave similarly, but I would like to have the
compiler throw at least warnings for unreachable code.
The compiler does generate a warning about the implicit interface if
-Wimplicit-interface is turned on explicitly. I would suggest this should be on
by default with -Wall on any source not written in F77, or when a higher
standard is enforced.
>From gcc-bugs-return-563108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 10:02:07 2017
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Subject: [Bug tree-optimization/79666] [5 Regression] wrong code (SIGFPE) at -O2 on x86_64-linux-gnu (in both 32-bit and 64-bit modes)
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79666
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 10:01:23 2017
New Revision: 247829
URL: https://gcc.gnu.org/viewcvs?rev=247829&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-06 Richard Biener <rguenther@suse.de>
PR fortran/79894
* trans.c (gfc_add_modify_loc): Weaken assert.
2017-03-02 Richard Biener <rguenther@suse.de>
PR c/79756
* c-common.c (c_common_mark_addressable_vec): Look through
C_MAYBE_CONST_EXPR.
* gcc.dg/vector-1.c: New testcase.
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79732
* tree-inline.c (expand_call_inline): Handle anonymous
SSA lhs properly when inlining a function without return
value.
* gcc.dg/torture/pr79732.c: New testcase.
2017-02-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/79666
* tree-vrp.c (extract_range_from_binary_expr_1): Make sure
to not symbolically negate if that may introduce undefined
overflow.
* gcc.dg/torture/pr79666.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79666.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79732.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/vector-1.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/c-family/ChangeLog
branches/gcc-5-branch/gcc/c-family/c-common.c
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-vrp.c
>From gcc-bugs-return-563106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 10:02:06 2017
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Subject: [Bug fortran/79894] [5 Regression] ICE in gfc_add_modify_loc, at fortran/trans.c:159
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79894
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 10:01:23 2017
New Revision: 247829
URL: https://gcc.gnu.org/viewcvs?rev=247829&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-06 Richard Biener <rguenther@suse.de>
PR fortran/79894
* trans.c (gfc_add_modify_loc): Weaken assert.
2017-03-02 Richard Biener <rguenther@suse.de>
PR c/79756
* c-common.c (c_common_mark_addressable_vec): Look through
C_MAYBE_CONST_EXPR.
* gcc.dg/vector-1.c: New testcase.
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79732
* tree-inline.c (expand_call_inline): Handle anonymous
SSA lhs properly when inlining a function without return
value.
* gcc.dg/torture/pr79732.c: New testcase.
2017-02-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/79666
* tree-vrp.c (extract_range_from_binary_expr_1): Make sure
to not symbolically negate if that may introduce undefined
overflow.
* gcc.dg/torture/pr79666.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79666.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79732.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/vector-1.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/c-family/ChangeLog
branches/gcc-5-branch/gcc/c-family/c-common.c
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-vrp.c
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Subject: [Bug middle-end/79756] [5 Regression] ICE in execute_todo, at passes.c:2011
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79756
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 10:01:23 2017
New Revision: 247829
URL: https://gcc.gnu.org/viewcvs?rev=247829&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-06 Richard Biener <rguenther@suse.de>
PR fortran/79894
* trans.c (gfc_add_modify_loc): Weaken assert.
2017-03-02 Richard Biener <rguenther@suse.de>
PR c/79756
* c-common.c (c_common_mark_addressable_vec): Look through
C_MAYBE_CONST_EXPR.
* gcc.dg/vector-1.c: New testcase.
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79732
* tree-inline.c (expand_call_inline): Handle anonymous
SSA lhs properly when inlining a function without return
value.
* gcc.dg/torture/pr79732.c: New testcase.
2017-02-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/79666
* tree-vrp.c (extract_range_from_binary_expr_1): Make sure
to not symbolically negate if that may introduce undefined
overflow.
* gcc.dg/torture/pr79666.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79666.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79732.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/vector-1.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/c-family/ChangeLog
branches/gcc-5-branch/gcc/c-family/c-common.c
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-vrp.c
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Subject: [Bug middle-end/79756] [5 Regression] ICE in execute_todo, at passes.c:2011
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79756
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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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/79666] [5 Regression] wrong code (SIGFPE) at -O2 on x86_64-linux-gnu (in both 32-bit and 64-bit modes)
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79666
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/79732] [5 Regression] ICE in set_ssa_default_def, at tree-dfa.c:327
Date: Wed, 10 May 2017 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79732
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 10 10:01:23 2017
New Revision: 247829
URL: https://gcc.gnu.org/viewcvs?rev=247829&root=gcc&view=rev
Log:
2017-05-10 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-06 Richard Biener <rguenther@suse.de>
PR fortran/79894
* trans.c (gfc_add_modify_loc): Weaken assert.
2017-03-02 Richard Biener <rguenther@suse.de>
PR c/79756
* c-common.c (c_common_mark_addressable_vec): Look through
C_MAYBE_CONST_EXPR.
* gcc.dg/vector-1.c: New testcase.
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79732
* tree-inline.c (expand_call_inline): Handle anonymous
SSA lhs properly when inlining a function without return
value.
* gcc.dg/torture/pr79732.c: New testcase.
2017-02-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/79666
* tree-vrp.c (extract_range_from_binary_expr_1): Make sure
to not symbolically negate if that may introduce undefined
overflow.
* gcc.dg/torture/pr79666.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79666.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr79732.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/vector-1.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/c-family/ChangeLog
branches/gcc-5-branch/gcc/c-family/c-common.c
branches/gcc-5-branch/gcc/fortran/ChangeLog
branches/gcc-5-branch/gcc/fortran/trans.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-inline.c
branches/gcc-5-branch/gcc/tree-vrp.c
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Subject: [Bug fortran/79894] [5 Regression] ICE in gfc_add_modify_loc, at fortran/trans.c:159
Date: Wed, 10 May 2017 10:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79894
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |5.4.1
Resolution|--- |FIXED
Known to fail| |5.4.0
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-563112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 10:11:23 2017
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Subject: [Bug middle-end/69921] Switch OpenACC kernels number of gangs from "decide at run time" to "decide at compile time"
Date: Wed, 10 May 2017 10:26:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-10
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |tschwinge at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
This will actually be resolved with the "Use "oacc kernels parallelized"
attribute for parallelized OpenACC kernels" patch,
<http://mid.mail-archive.com/8737cd4ukh.fsf@hertz.schwinge.homeip.net>.
For nvptx offloading, as the default has been changed in r241803, the value
however remains at 0 "have the run-time decide".
>From gcc-bugs-return-563113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 10:26:27 2017
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From: "steven at uplinklabs dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 10:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80626
--- Comment #5 from Steven Noonan <steven at uplinklabs dot net> ---
(In reply to H.J. Lu from comment #3)
> Please try
>
> diff --git a/gcc/ada/system-linux-x86.ads b/gcc/ada/system-linux-x86.ads
> index 22a212e..533d94e 100644
> --- a/gcc/ada/system-linux-x86.ads
> +++ b/gcc/ada/system-linux-x86.ads
> @@ -70,7 +70,7 @@ package System is
>
> Storage_Unit : constant := 8;
> Word_Size : constant := Standard'Word_Size;
> - Memory_Size : constant := 2 ** Word_Size;
> + Memory_Size : constant := 2 ** Long_Integer'Size;
>
> -- Address comparison
This seems to build perfectly for --with-multilib=m32,m64,mx32.
>From gcc-bugs-return-563114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 10:27:54 2017
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Subject: [Bug tree-optimization/79830] GCC generates counterproductive code surrounding very simple loops (improvement request)
Date: Wed, 10 May 2017 10:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79830
--- Comment #5 from amker at gcc dot gnu.org ---
(In reply to Richard Biener from comment #1)
> It is induction variable optimization (-fivopts) that re-writes the main
> induction variable. We have
>
> Original cost 17 (complexity 2)
>
> Final cost 17 (complexity 2)
>
> Selected IV set for loop 2 at t.C:44, 4 avg niters, 0 expressions, 1 IVs:
> Candidate 5:
> Var befor: ivtmp.25_108
> Var after: ivtmp.25_107
> Incr POS: before exit test
> IV struct:
> Type: sizetype
> Base: 0
> Step: 32
> Biv: N
> Overflowness wrto loop niter: No-overflow
>
> Replacing exit test: if (i_32 >= 0)
>
> but it doesn't seem to account the extra cost for the exit test replacement
> when facing equal original/final cost.
For the iv elimination issue, I think it's simply a bug in computing
elimination cost:
/* When the condition is a comparison of the candidate IV against
zero, prefer this IV.
TODO: The constant that we're subtracting from the cost should
be target-dependent. This information should be added to the
target costs for each backend. */
if (!elim_cost.infinite_cost_p () /* Do not try to decrease infinite! */
&& integer_zerop (*bound_cst)
&& (operand_equal_p (*control_var, cand->var_after, 0)
|| operand_equal_p (*control_var, cand->var_before, 0)))
elim_cost -= 1;
Why it compares against current bound_cst for elim_cost? After elimination, we
don't compare against bound_cst any more (very likely)!
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Subject: [Bug target/77728] [5 Regression] Miscompilation multiple vector iteration on ARM
Date: Wed, 10 May 2017 10:53:00 -0000
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Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mkuvyrkov at gcc dot gnu.org
--- Comment #58 from Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> ---
Shouldn't the release note [*] also specify AArch64 as the affected target, not
just ARM/AArch32?
[*] https://gcc.gnu.org/gcc-7/changes.html
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/77728] [5 Regression] Miscompilation multiple vector iteration on ARM
Date: Wed, 10 May 2017 11:02:00 -0000
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--- Comment #59 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It does mention it:
"GCC has been updated to the latest revision of the procedure call standard
(AAPCS64) to provide support for paramater passing when data types have been
over-aligned."
There were two issues, one is that old GCC had issues with passing of
overaligned and underaligned variables by value. This was a problem in GCC <
5.2 for arm32 and GCC <= 6.x for aarch64. And another thing was the bug
mentioned here, introduced for arm32 in 5.2 and for aarch64 only during
development of GCC 7. So there was no release for aarch64 with that bug.
>From gcc-bugs-return-563117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 11:02:04 2017
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Subject: [Bug target/80671] config/aarch64/cortex-a57-fma-steering.c:416: bad statement order ?
Date: Wed, 10 May 2017 11:12:00 -0000
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--- Comment #2 from wilco at gcc dot gnu.org ---
Author: wilco
Date: Wed May 10 11:01:26 2017
New Revision: 247831
URL: https://gcc.gnu.org/viewcvs?rev=247831&root=gcc&view=rev
Log:
Move an use-after-free access before the delete.
gcc/
PR target/80671
* config/aarch64/cortex-a57-fma-steering.c (merge_forest):
Move member access before delete.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/cortex-a57-fma-steering.c
>From gcc-bugs-return-563118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 11:12:29 2017
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Subject: [Bug target/77728] [5 Regression] Miscompilation multiple vector iteration on ARM
Date: Wed, 10 May 2017 11:23:00 -0000
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--- Comment #60 from Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #59)
> And another thing was the bug
> mentioned here, introduced for arm32 in 5.2 and for aarch64 only during
> development of GCC 7. So there was no release for aarch64 with that bug.
Thanks Jacub, I missed the last part about aarch64 being affected only in
development versions of GCC 7.
>From gcc-bugs-return-563119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 11:23:07 2017
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Subject: [Bug tree-optimization/80702] New: FRE fails to eliminate to leader dominating after unreachable edge removal
Date: Wed, 10 May 2017 11:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80702
Bug ID: 80702
Summary: FRE fails to eliminate to leader dominating after
unreachable edge removal
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
CC: matz at gcc dot gnu.org
Target Milestone: ---
For
int c;
int foo (int a, int b)
{
c = a + b;
int d = c - a;
int e;
if (d == b)
c = 2 * a;
e = 2 * a;
return e;
}
at -O2 SCCVN sees
Marking all edges out of BB 2 but (2 -> 3) as not executable
Visiting BB 3
Value numbering _3 stmt = _3 = a_5(D) * 2;
Setting value number of _3 to _3 (changed)
...
Visiting BB 4
...
Value numbering e_11 stmt = e_11 = a_5(D) * 2;
Setting value number of e_11 to _3 (changed)
but elimination ends up with the following because _3 is not thought to
be available in BB 4 (the domwalk used during elimination pops availability
of _3 after visiting dom children):
<bb 2> [0.00%]:
_1 = a_5(D) + b_6(D);
c = _1;
_3 = a_5(D) * 2;
c = _3;
e_11 = a_5(D) * 2;
return e_11;
A value-numbering rewrite should preserve the value-numbering but also
eventually do better during elimination.
Within the current scheme one could try to "cleverly" put aside info
we pop after visiting all dom children and restore it from a BB with
a single executable predecessor edge src.
The end goal should be merging of early CCP, forwprop and FRE without
losing the CFG cleanup early CCP is able to do and the followup FRE
that enables. Basically allow more CSE w/o the need to iterate though
CFG cleanup which would enable more CSE.
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
Date: Wed, 10 May 2017 11:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77684
--- Comment #5 from Andi Kleen <andi-gcc at firstfloor dot org> ---
Created attachment 41337
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41337&action=edit
limit perf buffer size
This patch allows parallelism upto 16 with the default setting.
Currently testing
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80701] gfortran ignores dead code after return statement
Date: Wed, 10 May 2017 11:51:00 -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| |2017-05-10
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The compiler does generate a warning about the implicit interface if
> -Wimplicit-interface is turned on explicitly. I would suggest this should
> be on by default with -Wall on any source not written in F77,
How do you know it before hand? In addition I don't think the warning is
relevant: if I add an interface, the warning disappears (as it should), but
there is still no mention of the "undefined" symbol that is used in the code.
> or when a higher standard is enforced.
IMO this should be closed as WONTFIX.
>From gcc-bugs-return-563122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 11:51:52 2017
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Subject: [Bug tree-optimization/79830] GCC generates counterproductive code surrounding very simple loops (improvement request)
Date: Wed, 10 May 2017 11:52:00 -0000
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--- Comment #6 from amker at gcc dot gnu.org ---
BTW, I don't see problem in iv_elimination for the second loop, the .L7 one.
It eliminates three IVs into one IV. Well, the bloated loop header could be
further simplified, but it's another issue requiring more vrp information,
i.e., simplify
((unsigned)i + 18446744073709551614) / 2 + 1
into
(unsigned)i
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Subject: [Bug testsuite/79067] gcc.dg/tree-prof/cold_partition_label.c runs a million times longer than it used to and times out
Date: Wed, 10 May 2017 12:25:00 -0000
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--- Comment #2 from Andi Kleen <andi-gcc at firstfloor dot org> ---
There's a separate fix for the random failures (or w/a increase
/proc/sys/kernel/perf_event_mlock_kb), see PR 77684
Not running the test on systems without FDO seems best. I don't think it does
anything useful there anyways.
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Subject: [Bug c++/80683] Exceptions don't propagate through default member initializer
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 66139 ***
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Wed, 10 May 2017 12:29:00 -0000
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--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> To expand on that, I think we want to drop that call from there and instead
> be able to simplify somehow a SAVE_EXPR if after c_fully_fold or cp_fold it
> becomes simple enough not to require any saving.
Hmm, I'm not sure what you mean. save_expr has
3351 if (tree_invariant_p_1 (inner))
3352 return expr;
so we shouldn't create unnecessary SAVE_EXPRs. Or do you mean something else?
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 80683 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/46476] Missing Warning about unreachable code after return
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Franz Sirl <sirl at gcc dot gnu.org> changed:
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--- Comment #10 from Franz Sirl <sirl at gcc dot gnu.org> ---
Clang does also have -Wunreachable-code-break and -Wunreachable-code-return,
which are really nice to have because you can turn them into errors separately.
But even clang misses a few cases that VS2015 can detect.
>From gcc-bugs-return-563128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 12:42:09 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Wed, 10 May 2017 12:49:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #11)
> (In reply to Jakub Jelinek from comment #5)
> > To expand on that, I think we want to drop that call from there and instead
> > be able to simplify somehow a SAVE_EXPR if after c_fully_fold or cp_fold it
> > becomes simple enough not to require any saving.
>
> Hmm, I'm not sure what you mean. save_expr has
>
> 3351 if (tree_invariant_p_1 (inner))
> 3352 return expr;
Sure, it has and also has skip_simple_arithmetic. But without the fold there
is a chance (though small, as fold isn't recursive) that it previously would
turn something non-invariant/simple arithmetics into invariant/simple arith and
we wouldn't create the SAVE_EXPR, but now do. Besides increased memory
footprint that wouldn't be bad, the problem is that I don't see any of the
recursive folders being able to undo that, so we end up with them until
gimplification.
Thus, it would be nice if e.g. cp_fold, or fold, or c_fully_fold_internal was
able to fold a SAVE_EXPR where:
inner = skip_simple_arithmetic (TREE_OPERAND (save_expr, 0));
if (TREE_CODE (inner) == ERROR_MARK)
return inner;
if (tree_invariant_p_1 (inner))
return TREE_OPERAND (save_expr, 0);
The problem on the C FE side (that would be nice to fix) is that it has its own
c_save_expr that wants the operand to be c_fully_folded already when creating
the SAVE_EXPR, it would be better if we could post-pone that and perhaps use
some flag on the SAVE_EXPR to indicate whether we've c_fully_folded the operand
already or not and only fully fold it once (C++ FE does that through its hash
maps) the first time something calls c_fully_fold on the SAVE_EXPR.
So maybe you should start just with the C++ FE for now, or do it in fold too.
>From gcc-bugs-return-563129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 12:49:36 2017
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From: "gustavo.hime at mpimet dot mpg.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80701] gfortran ignores dead code after return statement
Date: Wed, 10 May 2017 13:04:00 -0000
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--- Comment #2 from Gustavo Hime <gustavo.hime at mpimet dot mpg.de> ---
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The compiler does generate a warning about the implicit interface if
> -Wimplicit-interface is turned on explicitly. I would suggest this should
> be on by default with -Wall on any source not written in F77,
>How do you know it before hand?
Know what? The compiler can identify the minimum standard required from the
features used. In any event this is only part of the problem I reported.
>In addition I don't think the warning is
>relevant: if I add an interface, the warning disappears (as it should), but
>there is still no mention of the "undefined" symbol that is used in the code.
You can only add the interface if you know beforehand that the function is not
defined in any e.g. include or use statement. This implies you have written the
code yourself, and did so quite carefully, or that you work in an environment
where you can expect others to do the same.
Maybe you don't quite visualize the potential problems. Try looking at the
following:
MODULE P
LOGICAL, PARAMETER :: condition = .true.
END MODULE P
MODULE M
PUBLIC :: f
CONTAINS
SUBROUTINE f
USE P
IF (condition) RETURN
CALL undefined
END SUBROUTINE f
END MODULE M
... here, the compiler knows the condition is always true, but this might
easily be overseen by the programmer in a large codebase, who would be
justified in assuming that module P defines both "condition" and "undefined".
Alternatively, if the return statement is in the middle of a large (dirty and
ugly) routine, you might find yourself wondering (as I did) how come your code
compiles AND LINKS when you know the function "undefined" is not to be found in
the objects being linked together, without any warnings.
> or when a higher standard is enforced.
>IMO this should be closed as WONTFIX.
If you believe such code should compile and link cleanly, then keep it as is.
--
You are receiving this mail because:
You reported the bug.
>From gcc-bugs-return-563130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:04:15 2017
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Wed, 10 May 2017 13:06:00 -0000
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Jaak Ristioja <jaak at ristioja dot ee> changed:
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----------------------------------------------------------------------------
CC| |jaak at ristioja dot ee
--- Comment #9 from Jaak Ristioja <jaak at ristioja dot ee> ---
According to a Stack Overflow answer [1] this bug occurs when the constructor
is the first thing executed in the try-block. For example:
#include <iostream>
struct A { A(int e) { throw e; } };
struct B {
A a{42}; // Same with = 42; syntax
};
int main() {
try {
// Remove this printout line to trigger the bug:
std::cout << "Welcome" << std::endl;
B b;
} catch (int e) {
return e;
}
}
[1]: http://stackoverflow.com/a/43892501/3919155
>From gcc-bugs-return-563131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:06:16 2017
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Subject: [Bug rtl-optimization/80474] ipa-cp wrongly adding LO(symbol) twice
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--- Comment #5 from Jan Smets <jan.smets at nokia dot com> ---
We get 'good' code on 7.1/trunk since
2016-04-29 Patrick Palka <ppalka@gcc.gnu.org>
tree-ssa-threadedge.c (simplify_control_stmt_condition): Split out into ...
simplify_control_stmt_condition_1): ... here. Recurse into
BIT_AND_EXPRs and BIT_IOR_EXPRs.
but that just makes it latent.
>From gcc-bugs-return-563132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:25:11 2017
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Subject: [Bug fortran/80701] gfortran ignores dead code after return statement
Date: Wed, 10 May 2017 13:26:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR seems related to pr46476. While I am opposed to put any effort from the
gfortran side, if the flags mentioned in pr46476 are implemented in the
middle-end, they could benefit gfortran. Any objection to mark this pr as a
duplicate of pr46476?
>From gcc-bugs-return-563133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:26:46 2017
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Subject: [Bug tree-optimization/77644] missed optimization with sqrt in comparison
Date: Wed, 10 May 2017 13:27:00 -0000
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--- Comment #3 from prathamesh3492 at gcc dot gnu.org ---
Author: prathamesh3492
Date: Wed May 10 13:26:09 2017
New Revision: 247835
URL: https://gcc.gnu.org/viewcvs?rev=247835&root=gcc&view=rev
Log:
2017-05-10 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR tree-optimization/77644
* match.pd (sqrt(x) cmp sqrt(y) -> x cmp y): New pattern.
testsuite/
* gcc.dg/tree-ssa/pr77644.c: New test-case.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr77644.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/77644] missed optimization with sqrt in comparison
Date: Wed, 10 May 2017 13:33:00 -0000
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prathamesh3492 at gcc dot gnu.org changed:
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--- Comment #4 from prathamesh3492 at gcc dot gnu.org ---
Fixed on trunk.
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Subject: [Bug tree-optimization/77644] missed optimization with sqrt in comparison
Date: Wed, 10 May 2017 13:50:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Err, abs(A) < sqrt (B) isn't handled yet, no? Though I'm not sure if it's wise
to emit A * A < B for that given A * A is going to drop of quite some bits in
precision and likeliness to overflow / underflow to +Inf / denormal is high.
>From gcc-bugs-return-563136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:50:52 2017
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Wed, 10 May 2017 13:52:00 -0000
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--- Comment #10 from Ondřej Majerech <majerech.o at gmail dot com> ---
That SO answer appears to be plain out wrong. Running your snippet on GCC 6.3.1
and 8.0.0 20170507, the program calls terminate for me, even with the cout <<
"Welcome" line included.
>From gcc-bugs-return-563137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:52:32 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
This is just a cost model problem in the rs6000 back end. We don't recognize
the cost of the direct moves for a vec_construct. I have a patch in progress.
Confirmed, BTW.
>From gcc-bugs-return-563138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:57:16 2017
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Subject: [Bug testsuite/80694] [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
Date: Wed, 10 May 2017 13:58:00 -0000
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--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I think probably these tests failed before the fix, stopped failing with the
fix, and started failing again when the fix was reverted. So the revision
number is a red herring -- we need to figure out when these tests started
failing before Wilco's fix.
>From gcc-bugs-return-563139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 13:58:11 2017
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Subject: [Bug testsuite/80694] [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
Date: Wed, 10 May 2017 14:02:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
(In reply to Bill Schmidt from comment #2)
> I think probably these tests failed before the fix, stopped failing with the
> fix, and started failing again when the fix was reverted. So the revision
> number is a red herring -- we need to figure out when these tests started
> failing before Wilco's fix.
Oh, I failed reading comprehension. There is a subsequent fix, apparently,
that we haven't tried yet. Bill, can you please check it out?
>From gcc-bugs-return-563140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 14:02:01 2017
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Subject: [Bug fortran/80701] gfortran ignores dead code after return statement
Date: Wed, 10 May 2017 14:21:00 -0000
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--- Comment #4 from Gustavo Hime <gustavo.hime at mpimet dot mpg.de> ---
Regarding this as a duplicate: on the one hand, it seems to be the same issue.
Whether the (any) warning is on by default or not is something that will always
be disputable, but the main issue is getting the compiler to detect this.
However, since the object code does not contain the dead part, and hence no
symbols are resolved at link-time, many of the potential problems remain, i.e.,
the code will still compile and link in spite of there being a function call to
a symbol that isn't defined.
Consider that if the programmer writes an interface statement, thus suppressing
the "undeclared" part of the "undefinedness" and therefore the justification
for a compile-time warning, there should still be a link-time error message for
an unresolved symbol, the absence of which can be very misleading. The warning
that code was eliminated (as unreachable) would compensate for that.
For the record, the C compiler warns of undeclared symbols by default.
>From gcc-bugs-return-563141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 14:21:07 2017
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Subject: [Bug c++/80703] New: Including <utility> breaks structured bindings
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Bug ID: 80703
Summary: Including <utility> breaks structured bindings
Product: gcc
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>From this StackOverflow question: http://stackoverflow.com/q/43894619/2069064
This example fails:
#include <utility>
struct Point { int x, y; };
int main()
{
const auto [x, y] = Point{};
}
with:
bug.cpp: In function 'int main()':
bug.cpp:7:16: error: 'std::tuple_size<const Point>::value' is not an integral
constant expression
const auto [x, y] = Point{};
^~~~~~
but removing the #include <utility> causes it to compile.
>From gcc-bugs-return-563143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 14:28:29 2017
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Subject: [Bug libstdc++/80703] Including <utility> breaks structured bindings
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 78939 ***
>From gcc-bugs-return-563142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 14:25:44 2017
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Subject: [Bug libstdc++/80703] Including <utility> breaks structured bindings
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-10
CC| |trippels at gcc dot gnu.org,
| |ville at gcc dot gnu.org
Component|c++ |libstdc++
Ever confirmed|0 |1
>From gcc-bugs-return-563144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 14:28:31 2017
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Subject: [Bug libstdc++/78939] [C++17] <tuple> interferes with structured binding from struct
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |barry.revzin at gmail dot com
--- Comment #13 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 80703 has been marked as a duplicate of this bug. ***
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80640] Missing memory side effect with __atomic_thread_fence (2)
Date: Wed, 10 May 2017 14:41:00 -0000
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--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I've submitted a patch [1] for the missing compiler barrier, but however please
note that the original ompi code and the example in comment #3 are wrong: in a
pattern like
while (*foo)
__atomic_thread_fence(__ATOMIC_ACQUIRE);
I think there are two issues; first, if *foo is a non-atomic, non-volatile
object, a concurrent modification from another thread would invoke undefined
behavior due to a data race; and second, if the loop is not entered (i.e. *foo
is false initially), then execution does not encounter the acquire fence at all
(and generally execution doesn't encounter the acquire fence after observing
*foo==0, so subsequent loads are not properly ordered against that).
[1]: https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00782.html
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
Date: Wed, 10 May 2017 14:41:00 -0000
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--- Comment #11 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
This happens for all TARGET_EXPRs with the third operand (cleanup expression),
as an INIT_EXPR's rhs.
The cleanup sequence are pushed in gimplify_target_expr, which doesn't
handle TARGET_EXPRs as the INIT_EXPRs' rhs. So they just go missing.
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Subject: [Bug testsuite/80694] [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
Date: Wed, 10 May 2017 14:53:00 -0000
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--- Comment #4 from seurer at gcc dot gnu.org ---
These tests have flip-flopped between working and not several times recently.
I will got back through the logs and run some test to see if I can find where
things started to go bad.
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
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--- Comment #12 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
(In reply to Jaak Ristioja from comment #9)
> [1]: http://stackoverflow.com/a/43892501/3919155
I don't think this is the same bug.
This bug seems happening because GCC created "constexpr B::B(void)", but
actually
it throws, so can not be constexpr.
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Subject: [Bug fortran/79311] [OOP] ICE in generate_finalization_wrapper, at fortran/class.c:1992
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--- Comment #10 from DIL <liakhdi at ornl dot gov> ---
Thanks for fixing.
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Subject: [Bug c++/66139] destructor not called for members of partially constructed anonymous struct/array
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--- Comment #13 from Ondřej Majerech <majerech.o at gmail dot com> ---
(In reply to Xi Ruoyao from comment #12)
> (In reply to Jaak Ristioja from comment #9)
> > [1]: http://stackoverflow.com/a/43892501/3919155
>
> I don't think this is the same bug.
> This bug seems happening because GCC created "constexpr B::B(void)", but
> actually
> it throws, so can not be constexpr.
I would also think that to be a different bug, but when I reported that (bug
80683), it got marked as a duplicate of this one. Maybe the duplicate
classification of 80683 should be re-reviewed?
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Subject: [Bug testsuite/80694] [8 regression] test cases gcc.dg/vect/vect-44.c and vect-50.c fail starting with r247780
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
A review of the recent test results shows that the tests started working again
in the suggested time frame. Closing as fixed. Thanks!
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Subject: [Bug target/80687] [8 Regression] VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Wed May 10 15:45:52 2017
New Revision: 247839
URL: https://gcc.gnu.org/viewcvs?rev=247839&root=gcc&view=rev
Log:
2017-05-10 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/80687
PR fortran/80696
* m4/matmul_internal.m4: 'matmul_name`: Always
use malloc/free to allocate t1.
* generated/matmul_c10.c: Regenerated.
* generated/matmul_c16.c: Regenerated.
* generated/matmul_c4.c: Regenerated.
* generated/matmul_c8.c: Regenerated.
* generated/matmul_i1.c: Regenerated.
* generated/matmul_i16.c: Regenerated.
* generated/matmul_i2.c: Regenerated.
* generated/matmul_i4.c: Regenerated.
* generated/matmul_i8.c: Regenerated.
* generated/matmul_r10.c: Regenerated.
* generated/matmul_r16.c: Regenerated.
* generated/matmul_r4.c: Regenerated.
* generated/matmul_r8.c: Regenerated.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/matmul_c10.c
trunk/libgfortran/generated/matmul_c16.c
trunk/libgfortran/generated/matmul_c4.c
trunk/libgfortran/generated/matmul_c8.c
trunk/libgfortran/generated/matmul_i1.c
trunk/libgfortran/generated/matmul_i16.c
trunk/libgfortran/generated/matmul_i2.c
trunk/libgfortran/generated/matmul_i4.c
trunk/libgfortran/generated/matmul_i8.c
trunk/libgfortran/generated/matmul_r10.c
trunk/libgfortran/generated/matmul_r16.c
trunk/libgfortran/generated/matmul_r4.c
trunk/libgfortran/generated/matmul_r8.c
trunk/libgfortran/m4/matmul_internal.m4
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Subject: [Bug fortran/80696] [8 Regression] New Failures to do with matmul
Date: Wed, 10 May 2017 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80696
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Wed May 10 15:45:52 2017
New Revision: 247839
URL: https://gcc.gnu.org/viewcvs?rev=247839&root=gcc&view=rev
Log:
2017-05-10 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/80687
PR fortran/80696
* m4/matmul_internal.m4: 'matmul_name`: Always
use malloc/free to allocate t1.
* generated/matmul_c10.c: Regenerated.
* generated/matmul_c16.c: Regenerated.
* generated/matmul_c4.c: Regenerated.
* generated/matmul_c8.c: Regenerated.
* generated/matmul_i1.c: Regenerated.
* generated/matmul_i16.c: Regenerated.
* generated/matmul_i2.c: Regenerated.
* generated/matmul_i4.c: Regenerated.
* generated/matmul_i8.c: Regenerated.
* generated/matmul_r10.c: Regenerated.
* generated/matmul_r16.c: Regenerated.
* generated/matmul_r4.c: Regenerated.
* generated/matmul_r8.c: Regenerated.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/matmul_c10.c
trunk/libgfortran/generated/matmul_c16.c
trunk/libgfortran/generated/matmul_c4.c
trunk/libgfortran/generated/matmul_c8.c
trunk/libgfortran/generated/matmul_i1.c
trunk/libgfortran/generated/matmul_i16.c
trunk/libgfortran/generated/matmul_i2.c
trunk/libgfortran/generated/matmul_i4.c
trunk/libgfortran/generated/matmul_i8.c
trunk/libgfortran/generated/matmul_r10.c
trunk/libgfortran/generated/matmul_r16.c
trunk/libgfortran/generated/matmul_r4.c
trunk/libgfortran/generated/matmul_r8.c
trunk/libgfortran/m4/matmul_internal.m4
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Subject: [Bug fortran/80696] [8 Regression] New Failures to do with matmul
Date: Wed, 10 May 2017 15:50:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed, closing.
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Subject: [Bug target/80687] [8 Regression] VLA usage in libgfortran; nvptx target: "sorry, unimplemented: target cannot support alloca"
Date: Wed, 10 May 2017 15:51:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed, closing.
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Subject: [Bug libfortran/80602] Reduce stack usage for blocked matmul
Date: Wed, 10 May 2017 15:56:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Might want to backport the 8.0 patch to gcc-7, but only
after the dust from the regressions this caused has settled.
>From gcc-bugs-return-563157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 10 15:56:48 2017
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Subject: [Bug c++/79549] [c++1z] ICE in tsubst, at cp/pt.c:13474 with partial specialization of auto... template parameter pack
Date: Wed, 10 May 2017 16:04:00 -0000
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed May 10 15:56:09 2017
New Revision: 247842
URL: https://gcc.gnu.org/viewcvs?rev=247842&root=gcc&view=rev
Log:
PR c++/79549 - C++17 ICE with non-type auto template parameter pack
* pt.c (convert_template_argument): Just return an argument pack.
(coerce_template_parameter_pack, template_parm_to_arg)
(extract_fnparm_pack, make_argument_pack, tsubst_template_args)
(tsubst_decl, tsubst, type_unification_real, unify_pack_expansion):
Don't set the type of a NONTYPE_ARGUMENT_PACK.
* parser.c (make_char_string_pack, make_string_pack): Likewise.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Wed, 10 May 2017 16:33:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |iains at gcc dot gnu.org
--- Comment #18 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> This failure is simply a consequence of broken libgcc on Darwin: this
> libgcc is not able to get exception table addresses and therefore cannot
> propagate exceptions.
>
> Any program (that uses exceptions) and linked with -static-libgcc on
> Darwin will also fail.
In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
--- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
+++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
@@ -99,6 +99,8 @@
ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
# Unresolved warnings in specific files.
ada/adaint.o-warn = -Wno-error
+# For unwind-pe.h
+CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
ada/%.o: ada/gcc-interface/%.c
$(COMPILE) $<
Isn't this wrong for darwin?
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From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80705] New: Incorrect code generated for profile counter updates due to SLP+LIM
Date: Wed, 10 May 2017 16:35:00 -0000
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Bug ID: 80705
Summary: Incorrect code generated for profile counter updates
due to SLP+LIM
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pthaugen at gcc dot gnu.org
CC: dje at gcc dot gnu.org, wschmidt at gcc dot gnu.org
Target Milestone: ---
Host: powerpc64le-unknown-linux-gnu
Target: powerpc64le-unknown-linux-gnu
Build: powerpc64le-unknown-linux-gnu
Created attachment 41338
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41338&action=edit
reduced testcase
The attached testcase shows a problem where profile counter updates are
incorrectly generated, which then leads to invalid profile info when the
original source is rebuilt with -fprofile-use.
Compile options used : -Ofast -mcpu=power8 -fprofile-generate
The problem occurs on the edge counter updates for the following inner loop:
while (*s && *s!='\r' && *s!='\n' && *s!='"')
SLP vectorization combines adjacent counter writes on the exit paths from the
loop into vector store operations. LIM then comes along and hoists the initial
counter read outside the outer loop. This causes the problem because when the
inner loop is entered again the edge counters are initialized to the values
originally read from memory (i.e. values when the function was originally
entered) NOT the updated counter values that were written to memory when
exiting the inner loop. Aliasing problem?
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #12)
> (In reply to Marek Polacek from comment #11)
> > (In reply to Jakub Jelinek from comment #5)
> > > To expand on that, I think we want to drop that call from there and instead
> > > be able to simplify somehow a SAVE_EXPR if after c_fully_fold or cp_fold it
> > > becomes simple enough not to require any saving.
> >
> > Hmm, I'm not sure what you mean. save_expr has
> >
> > 3351 if (tree_invariant_p_1 (inner))
> > 3352 return expr;
>
> Sure, it has and also has skip_simple_arithmetic. But without the fold
> there is a chance (though small, as fold isn't recursive) that it previously
> would turn something non-invariant/simple arithmetics into invariant/simple
> arith and we wouldn't create the SAVE_EXPR, but now do. Besides increased
> memory footprint that wouldn't be bad, the problem is that I don't see any
> of the recursive folders being able to undo that, so we end up with them
> until gimplification.
This is true, but it happens very rarely. It can happen e.g. when the fold()
call in save_expr() folds away the first operand of a COMPOUND_EXPR, and the
second operand is e.g.
(long unsigned int) ((sizetype) SAVE_EXPR <n> * 4)
then skip_simple_arithmetic can pull out "SAVE_EXPR <n>" out of it, which is
tree_invariant_p_1.
> Thus, it would be nice if e.g. cp_fold, or fold, or c_fully_fold_internal
> was able to fold a SAVE_EXPR where:
> inner = skip_simple_arithmetic (TREE_OPERAND (save_expr, 0));
> if (TREE_CODE (inner) == ERROR_MARK)
> return inner;
>
> if (tree_invariant_p_1 (inner))
> return TREE_OPERAND (save_expr, 0);
But even if I add this to fold or c_fully_fold, we don't have any guarantees
that any of these will be called before gimplification, right? So most likely
we'd end up with the new SAVE_EXPR in the gimplifier, which, as you point out,
is not that bad.
> The problem on the C FE side (that would be nice to fix) is that it has its
> own c_save_expr that wants the operand to be c_fully_folded already when
> creating the SAVE_EXPR, it would be better if we could post-pone that and
> perhaps use some flag on the SAVE_EXPR to indicate whether we've
> c_fully_folded the operand already or not and only fully fold it once (C++
> FE does that through its hash maps) the first time something calls
> c_fully_fold on the SAVE_EXPR.
> So maybe you should start just with the C++ FE for now, or do it in fold too.
But c_fully_fold nor cp_fold step into SAVE_EXPRs, they just return them
unmodified. What can happen though is that c_save_expr gets something that
c_fully_fold folds into an invariant/simple arith, in which case we don't wrap
it in SAVE_EXPR, so the same expression might be folded multiple times, right?
And that could be solved by adding a hash map to c_fully_fold.
So shouldn't we first apply just this?
Comments very appreciated.
--- gcc/tree.c
+++ gcc/tree.c
@@ -3337,7 +3337,6 @@ tree_invariant_p (tree t)
tree
save_expr (tree expr)
{
- tree t = fold (expr);
tree inner;
/* If the tree evaluates to a constant, then we don't want to hide that
@@ -3345,33 +3344,33 @@ save_expr (tree expr)
However, a read-only object that has side effects cannot be bypassed.
Since it is no problem to reevaluate literals, we just return the
literal node. */
- inner = skip_simple_arithmetic (t);
+ inner = skip_simple_arithmetic (expr);
if (TREE_CODE (inner) == ERROR_MARK)
return inner;
if (tree_invariant_p_1 (inner))
- return t;
+ return expr;
/* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time,
since
it means that the size or offset of some field of an object depends on
the value within another field.
- Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
+ Note that it must not be the case that EXPR contains both a
PLACEHOLDER_EXPR
and some variable since it would then need to be both evaluated once and
evaluated more than once. Front-ends must assure this case cannot
happen by surrounding any such subexpressions in their own SAVE_EXPR
and forcing evaluation at the proper time. */
if (contains_placeholder_p (inner))
- return t;
+ return expr;
- t = build1 (SAVE_EXPR, TREE_TYPE (expr), t);
- SET_EXPR_LOCATION (t, EXPR_LOCATION (expr));
+ expr = build1 (SAVE_EXPR, TREE_TYPE (expr), expr);
+ SET_EXPR_LOCATION (expr, EXPR_LOCATION (expr));
/* This expression might be placed ahead of a jump to ensure that the
value was computed on both sides of the jump. So make sure it isn't
eliminated as dead. */
- TREE_SIDE_EFFECTS (t) = 1;
- return t;
+ TREE_SIDE_EFFECTS (expr) = 1;
+ return expr;
}
/* Look inside EXPR into any simple arithmetic operations. Return the
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Subject: [Bug tree-optimization/51513] Only partially optimizes away __builtin_unreachable switch default case
Date: Wed, 10 May 2017 16:57:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed on trunk with revision 247844.
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
Date: Wed, 10 May 2017 17:03:00 -0000
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #13)
> This is true, but it happens very rarely. It can happen e.g. when the
> fold() call in save_expr() folds away the first operand of a COMPOUND_EXPR,
> and the second operand is e.g.
Can't it happen say if you have save_expr called with (0 * i) + (0 * j) + (0 *
k) or whatever similar initially complex, but after folding very simple and
obviously invariant?
> But even if I add this to fold or c_fully_fold, we don't have any guarantees
> that any of these will be called before gimplification, right? So most
> likely we'd end up with the new SAVE_EXPR in the gimplifier, which, as you
> point out, is not that bad.
I think cp_fold should handle SAVE_EXPR (by cp_folding the operand, and if it
is invariant or invariant after skipping simple arith, returning that folded
operand, otherwise making sure to add the SAVE_EXPR into the fold_cache giving
the SAVE_EXPR itself. Right now cp_fold ignores SAVE_EXPR, but cp_fold_r
handles it, but that one doesn't do much good, because it cp_folds the operands
only after folding the containing trees.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80705] Incorrect code generated for profile counter updates due to SLP+LIM
Date: Wed, 10 May 2017 17:35:00 -0000
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--- Comment #1 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
I should have noted that the dumps I was looking at were slp1 and lim4.
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Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 17:37:00 -0000
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--- Comment #6 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed May 10 17:35:02 2017
New Revision: 247849
URL: https://gcc.gnu.org/viewcvs?rev=247849&root=gcc&view=rev
Log:
Ada/x32: PR ada/80626: Correct Memory_Size
X32 uses 64 as word size instead of 32. This must not affect the
Address type definition which is based on Memory_Size.
PR ada/80626
* system-linux-x86.ads (Memory_Size): Use Long_Integer'Size
instead of Word_Size.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/system-linux-x86.ads
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Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 17:37:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed May 10 17:36:50 2017
New Revision: 247850
URL: https://gcc.gnu.org/viewcvs?rev=247850&root=gcc&view=rev
Log:
Ada/x32: PR ada/80626: Correct Memory_Size
X32 uses 64 as word size instead of 32. This must not affect the
Address type definition which is based on Memory_Size.
Back port from mainline
PR ada/80626
* system-linux-x86.ads (Memory_Size): Use Long_Integer'Size
instead of Word_Size.
Modified:
branches/gcc-7-branch/gcc/ada/ChangeLog
branches/gcc-7-branch/gcc/ada/system-linux-x86.ads
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Subject: [Bug ada/80626] [7/8 Regression] Ada x32 multilib build failure for a-cfinve.ads
Date: Wed, 10 May 2017 17:45:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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Target Milestone|--- |7.2
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed on trunk and for 7.2.
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Wed, 10 May 2017 18:02:00 -0000
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--- Comment #7 from seurer at gcc dot gnu.org ---
The Fortran tests (from 80644) that I traced to this revision still fail on
powerpc64le:
spawn /home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../gfortran
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/mvbits_7.f90
-fno-diagnostics-show-caret -fdiagnostics-color=never -O0 -pedantic-errors
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libatomic/.libs
-lm -o ./mvbits_7.exe
FAIL: gfortran.dg/mvbits_7.f90 -O0 (test for warnings, line 28)
PASS: gfortran.dg/mvbits_7.f90 -O0 (test for excess errors)
This is looking for a warning that is not generated now.
spawn /home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../gfortran
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran/../../
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90
-fno-diagnostics-show-caret -fdiagnostics-color=never -Os -pedantic-errors
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libatomic/.libs
-lm -o ./elemental_subroutine_3.exe
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90:37:0:
Warning: '__builtin_memcpy' reading 16 bytes from a region of size 12
[-Wstringop-overflow=]
output is:
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90:37:0:
Warning: '__builtin_memcpy' reading 16 bytes from a region of size 12
[-Wstringop-overflow=]
FAIL: gfortran.dg/elemental_subroutine_3.f90 -Os (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/elemental_subroutine_3.f90:37:0:
Warning: '__builtin_memcpy' reading 16 bytes from a region of size 12
[-Wstringop-overflow=]
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Subject: [Bug c/80706] New: peephole2 uses uninitialized stack variables on i686
Date: Wed, 10 May 2017 18:04:00 -0000
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Bug ID: 80706
Summary: peephole2 uses uninitialized stack variables on i686
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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This is a GCC bug stemming from this issue [1] on the JuliaLang bug tracker.
While compiling the project openlibm [2] using GCC 7.1.0 targeting i686, the
peephole2 optimization pass generates code that uses uninitialized stack
memory. The process of discovery can be seen in [1], but I will summarize
here.
Openlibm is a replacement for libm on various platforms. It contains an acos()
implementation that compiles properly on GCC 6.3.0, or GCC 7.1.0 with
-fno-peephole2. If peephole2 is enabled, the acos() function returns incorrect
results because it pulls in a piece of uninitialized stack. From a library
user's perspective, this can be triggered through the use of a .C program such
as this one [3] (there is example shell output shown at the bottom of that
link). This example sets up the stack such that any uninitialized access
results in extremely large numbers. Note that we call acos() twice, because
the first time we call, the dl_runtime_resolve() stuff that patches the
openlibm library's acos() function into the C process sets up the stack such
that uninitialized access sees extremely small values.
We then took this example, ran it through creduce, and ended up with this
reduced case [4]. This reduced case still calculates the correct value of
acos(0.8), however when compiled with -fpeephole2, the uninitialized memory
causes the computation to change. Note that because this reduced case does not
purposefully set up the stack like the code in [3] does, the change in the
computation depends on the vagaries of how the stack is setup.
[1] https://github.com/JuliaLang/julia/issues/21742
[2] https://github.com/JuliaLang/openlibm
[3] https://gist.github.com/staticfloat/70651dfd50a9995492ac494d47065d26
[4] https://gist.github.com/staticfloat/d357b985eab757f393fa7e5ff1ee4101
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Subject: [Bug other/80066] dead stores and initializations pointed out by clang --analyze
Date: Wed, 10 May 2017 18:21:00 -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> ---
I'm not going to pursue this further. Closing.
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Subject: [Bug middle-end/80364] [7 Regression]sanitizer detects signed integer overflow in gimple-ssa-sprintf.c
Date: Wed, 10 May 2017 19:32:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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CC| |mpolacek at gcc dot gnu.org
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> Another thing is that ubsan should not present array types, the negation
> certainly has long int type rather than long int [3].
I can't make this happen. Anybody have a testcase for this?
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Wed, 10 May 2017 20:04:00 -0000
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--- Comment #6 from Ian Lance Taylor <ian at airs dot com> ---
I'm sorry, I still can't recreate it. I'm now at SVN revision 247848.
Note that I just committed a number of changes to the Go frontend, and I was
using those changes when I tested before. I don't see why they would affect
this, but perhaps they do. If that is the case, then you will no longer see a
problem either.
I edited the gcc_checking_assert at symtab.c:1865 to be a plain gcc_assert,
though I think that shouldn't matter.
This is what I see:
> gccgo -flto pr64238/bytes_decl.go pr64238/bytes.go
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Count: error:
undefined reference to 'go.bytes.IndexByte'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Count: error:
undefined reference to 'go.bytes.Equal'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
undefined reference to 'go.bytes.IndexByte'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
undefined reference to 'go.bytes.IndexByte'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
undefined reference to 'go.bytes.Equal'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.LastIndex: error:
undefined reference to 'go.bytes.Equal'
/tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function bytes.genSplit: error:
undefined reference to 'go.bytes.Equal'
collect2: error: ld returned 1 exit status
> gccgo -flto pr64238/bytes_decl.go pr64238/bytes.go -fgo-pkgpath=bytes
> echo $?
0
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Subject: [Bug target/80706] peephole2 uses uninitialized stack variables on i686
Date: Wed, 10 May 2017 22:54:00 -0000
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--- Comment #1 from Elliot Saba <staticfloat at gmail dot com> ---
I should also note that this is fixed if I provide `-mfpmath=sse` in addition
to any other optimization flags.
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Subject: [Bug target/79027] [8 Regression] fold-const.c:11104:1: internal compiler error: Floating point exception
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--- Comment #9 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Wed May 10 22:54:07 2017
New Revision: 247869
URL: https://gcc.gnu.org/viewcvs?rev=247869&root=gcc&view=rev
Log:
PR target/79027
* config/pa/pa.c (pa_cannot_change_mode_class): Reject changes to/from
modes with zero size. Enhance comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/pa/pa.c
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Subject: [Bug target/79027] [8 Regression] fold-const.c:11104:1: internal compiler error: Floating point exception
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--- Comment #10 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Wed May 10 23:08:32 2017
New Revision: 247870
URL: https://gcc.gnu.org/viewcvs?rev=247870&root=gcc&view=rev
Log:
PR target/79027
* config/pa/pa.c (pa_cannot_change_mode_class): Reject changes to/from
modes with zero size. Enhance comment.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/pa/pa.c
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Subject: [Bug target/79027] [8 Regression] fold-const.c:11104:1: internal compiler error: Floating point exception
Date: Wed, 10 May 2017 23:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79027
--- Comment #11 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Wed May 10 23:09:54 2017
New Revision: 247871
URL: https://gcc.gnu.org/viewcvs?rev=247871&root=gcc&view=rev
Log:
PR target/79027
* config/pa/pa.c (pa_cannot_change_mode_class): Reject changes to/from
modes with zero size. Enhance comment.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/pa/pa.c
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80090] Incorrect assembler - output_addr_const may generate visibility output between op and address constant
Date: Thu, 11 May 2017 00:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80090
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Wed May 10 23:54:58 2017
New Revision: 247872
URL: https://gcc.gnu.org/viewcvs?rev=247872&root=gcc&view=rev
Log:
PR target/80090
* config/pa/pa.c (pa_assemble_integer): When outputting a SYMBOL_REF,
handle calling assemble_external ourself.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/pa/pa.c
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80090] Incorrect assembler - output_addr_const may generate visibility output between op and address constant
Date: Thu, 11 May 2017 00:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80090
--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Thu May 11 00:13:00 2017
New Revision: 247873
URL: https://gcc.gnu.org/viewcvs?rev=247873&root=gcc&view=rev
Log:
PR target/80090
* config/pa/pa.c (pa_assemble_integer): When outputting a SYMBOL_REF,
handle calling assemble_external ourself.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/pa/pa.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80090] Incorrect assembler - output_addr_const may generate visibility output between op and address constant
Date: Thu, 11 May 2017 00:17:00 -0000
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--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Thu May 11 00:15:04 2017
New Revision: 247874
URL: https://gcc.gnu.org/viewcvs?rev=247874&root=gcc&view=rev
Log:
PR target/80090
* config/pa/pa.c (pa_assemble_integer): When outputting a SYMBOL_REF,
handle calling assemble_external ourself.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/pa/pa.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80090] Incorrect assembler - output_addr_const may generate visibility output between op and address constant
Date: Thu, 11 May 2017 00:18:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed on trunk, gcc-7 and gcc-6.
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Subject: [Bug target/79027] [8 Regression] fold-const.c:11104:1: internal compiler error: Floating point exception
Date: Thu, 11 May 2017 03:35:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #12 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed on trunk, gcc-7 and gcc-6.
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From: "ryxi at stu dot xidian.edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80683] Exceptions don't propagate through default member initializer
Date: Thu, 11 May 2017 04:02:00 -0000
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--- Comment #2 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
I don't think it's PR66139.
In PR66139, the exception is caught, but some destructors aren't called.
In this PR, the exception is not caught at all.
For this PR, the problem is:
1) GCC created "constexpr B::B()" and call A::A() in it.
2) In optimization, GCC think a constexpr doesn't throw. So the EH code is
optimized away.
3) But actually B::B() throws and shouldn't be a constexpr.
I'll read the standard and find out what should we do for this.
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From: "andi-gcc at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/79067] gcc.dg/tree-prof/cold_partition_label.c runs a million times longer than it used to and times out
Date: Thu, 11 May 2017 04:12:00 -0000
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--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> ---
sandra,
does this patch fix it?
diff --git a/gcc/testsuite/gcc.dg/tree-prof/cold_partition_label.c
b/gcc/testsuite/gcc.dg/tree-prof/cold_partition_label.c
index 6214e3629f2..924a270e1bd 100644
--- a/gcc/testsuite/gcc.dg/tree-prof/cold_partition_label.c
+++ b/gcc/testsuite/gcc.dg/tree-prof/cold_partition_label.c
@@ -2,6 +2,7 @@
gets a label. */
/* { dg-require-effective-target freorder } */
/* { dg-options "-O2 -freorder-blocks-and-partition -save-temps" } */
+/* { dg-require-profiling "-fprofile-generate" } */
#define SIZE 10000
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Subject: [Bug middle-end/80364] [7 Regression]sanitizer detects signed integer overflow in gimple-ssa-sprintf.c
Date: Thu, 11 May 2017 06:02:00 -0000
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
Marek, I believe this issue has been fixed.
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80707] New: [8 Regression] r247844 causes error: extra outgoing edge
Date: Thu, 11 May 2017 06:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80707
Bug ID: 80707
Summary: [8 Regression] r247844 causes error: extra outgoing
edge
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
Since r247844:
trippels@gcc2-power8 ~ % cat tzfmt.ii
struct A {
int m_fn1(int &) const;
};
int A::m_fn1(int &p1) const {
int a[6];
int b = 0;
for (int i;; i++) {
if (a[i])
break;
b++;
}
while (b) {
int c;
switch (b) {
case 1:
c = 0;
break;
case 5:
c = a[0];
}
if (c)
p1 = 0;
b--;
}
}
trippels@gcc2-power8 ~ % g++ -c -O3 tzfmt.ii
tzfmt.ii: In member function ‘int A::m_fn1(int&) const’:
tzfmt.ii:4:5: error: extra outgoing edge 43->33
int A::m_fn1(int &p1) const {
^
tzfmt.ii:4:5: error: extra outgoing edge 44->33
tzfmt.ii:4:5: internal compiler error: verify_flow_info failed
0x105d8db3 verify_flow_info()
../../gcc/gcc/cfghooks.c:260
0x10bb613b checking_verify_flow_info
../../gcc/gcc/cfghooks.h:198
0x10bb613b cleanup_tree_cfg_noloop
../../gcc/gcc/tree-cfgcleanup.c:837
0x10bb613b cleanup_tree_cfg()
../../gcc/gcc/tree-cfgcleanup.c:883
0x10a3c147 execute_function_todo
../../gcc/gcc/passes.c:1921
0x10a3ced3 do_per_function
../../gcc/gcc/passes.c:1652
0x10a3d153 execute_todo
../../gcc/gcc/passes.c:2018
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 06:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-11
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.2
Summary|peephole2 uses |[7/8 Regression] peephole2
|uninitialized stack |uses uninitialized stack
|variables on i686 |variables on i686
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r236863.
>From gcc-bugs-return-563186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 06:39:28 2017
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Subject: [Bug c++/80683] Exceptions don't propagate through default member initializer
Date: Thu, 11 May 2017 06:47:00 -0000
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--- Comment #3 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
For debug purpose, compiled this code in C++98 mode
(non-static data member initializers is a GNU extension in C++98 and would
be warned). The result is still buggy. Defaulted B::B() is marked noexcept.
>From gcc-bugs-return-563187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 06:47:08 2017
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Subject: [Bug middle-end/71509] Bitfield causes load hit store with larger store than load
Date: Thu, 11 May 2017 06:55:00 -0000
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Nicholas Piggin <npiggin at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |npiggin at gmail dot com
--- Comment #5 from Nicholas Piggin <npiggin at gmail dot com> ---
This test case seems like it may be related. It does the right thing and uses
all 4 byte ops when the 8 byte alignment is removed. I post it here because it
may not always be the case that smallest op is best
struct s {
unsigned long align1;
union {
unsigned int blah;
unsigned int a:1;
};
};
void test2(struct s *s)
{
s->blah = 100;
if (s->a)
asm volatile("#blah");
}
Generates (gcc 7.0.1)
test2:
li 9,100
stw 9,8(3)
ld 9,8(3)
andi. 9,9,0x1
beqlr 0
#APP
# 29 "a.c" 1
#blah
# 0 "" 2
#NO_APP
blr
There is a more general case of mismatched load and store sizes in unions with
different size types, but in this case the sizes could be matched I think.
>From gcc-bugs-return-563188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 06:55:46 2017
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |uros at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So peephole2 does here:
- fstpl 24(%esp)
- movq 24(%esp), %xmm0
- movq %xmm0, 32(%esp)
+ fstpl 32(%esp)
movl $0, 32(%esp)
That is a nice simplification, but has one extra requirement not checked (and
hard to check) in the peephole2 patterns - that the memory slot stored in the
first store is a scratch memory not used afterwards (or overwritten first, i.e.
dead). While we have peep2_reg_dead_p predicates, we don't have
peep2_mem_dead_p and implementing that would be hard, only DSE has
infrastructure to do that, but dse2 is run before peephole2 pass.
All we could do is simplify the mem[sp+24]=st; xmm0=[sp+24]; [sp+32]=xmm0;
into mem[sp+24]=st; mem[sp+32]=st; and let the regstack pass figure out
something with it - fstl 24(%esp); fstpl 32(%esp) ?). DSE isn't run
afterwards, so it would be nice to do that earlier though.
>From gcc-bugs-return-563189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 07:06:51 2017
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Thu, 11 May 2017 07:19:00 -0000
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--- Comment #19 from Tristan Gingold <gingold at adacore dot com> ---
On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
> In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
>
> --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
> +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
> @@ -99,6 +99,8 @@
> ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
> # Unresolved warnings in specific files.
> ada/adaint.o-warn = -Wno-error
> +# For unwind-pe.h
> +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
>
> ada/%.o: ada/gcc-interface/%.c
> $(COMPILE) $<
>
> Isn't this wrong for darwin?
Why ?
The header unwind-pe.h is needed for the personality routine.
>From gcc-bugs-return-563190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 07:19:31 2017
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 07:43:00 -0000
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> So peephole2 does here:
> - fstpl 24(%esp)
> - movq 24(%esp), %xmm0
> - movq %xmm0, 32(%esp)
> + fstpl 32(%esp)
> movl $0, 32(%esp)
> That is a nice simplification, but has one extra requirement not checked
> (and hard to check) in the peephole2 patterns - that the memory slot stored
> in the first store is a scratch memory not used afterwards (or overwritten
> first, i.e. dead). While we have peep2_reg_dead_p predicates, we don't have
> peep2_mem_dead_p and implementing that would be hard, only DSE has
> infrastructure to do that, but dse2 is run before peephole2 pass.
> All we could do is simplify the mem[sp+24]=st; xmm0=[sp+24]; [sp+32]=xmm0;
> into mem[sp+24]=st; mem[sp+32]=st; and let the regstack pass figure out
> something with it - fstl 24(%esp); fstpl 32(%esp) ?). DSE isn't run
> afterwards, so it would be nice to do that earlier though.
Let's keep the dangling store to a temporary here. We already loaded the value
from the memory, so one extra store won't hurt that much...
>From gcc-bugs-return-563191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 07:43:45 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80683
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Last reconfirmed| |2017-05-11
Resolution|DUPLICATE |---
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Let's reopen this one then.
>From gcc-bugs-return-563192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 07:44:34 2017
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Thu, 11 May 2017 07:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Tristan Gingold from comment #19)
> On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> > In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
> >
> > --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
> > +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
> > @@ -99,6 +99,8 @@
> > ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
> > # Unresolved warnings in specific files.
> > ada/adaint.o-warn = -Wno-error
> > +# For unwind-pe.h
> > +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
> >
> > ada/%.o: ada/gcc-interface/%.c
> > $(COMPILE) $<
> >
> > Isn't this wrong for darwin?
>
> Why ?
>
> The header unwind-pe.h is needed for the personality routine.
What we need to do is to remove the (use of) libgcc_s and not use libgcc_eh
(static-libgcc) for Darwin > 10, since the unwinder is now in
usr/lib/system/libunwind.dylib.
Needs two chunks (1) move the content for TLS emulation somewhere else, since
that's a reason to need libgcc_s (2) adjust the use of libgcc for Darwin > 10
to not include libgcc_eh for -static-libgcc. I have some patches for gcc-5 and
6 that do this, will forward-port them.
I'm a little surprised that we need explicit -static-libstdc++ for gnat, the
rest of the compiler already handles this?
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Subject: [Bug c++/80682] __is_trivially_constructible(void, int) returns true.
Date: Thu, 11 May 2017 07:46:00 -0000
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--- Comment #3 from ville at gcc dot gnu.org ---
Author: ville
Date: Thu May 11 07:44:29 2017
New Revision: 247880
URL: https://gcc.gnu.org/viewcvs?rev=247880&root=gcc&view=rev
Log:
PR c++/80682
cp/
PR c++/80682
* method.c (is_trivially_xible): Reject void types.
testsuite/
PR c++/80682
* g++.dg/ext/is_trivially_constructible1.C: Add tests for void target.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/method.c
trunk/gcc/testsuite/g++.dg/ext/is_trivially_constructible1.C
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Subject: [Bug c++/80682] __is_trivially_constructible(void, int) returns true.
Date: Thu, 11 May 2017 07:49:00 -0000
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--- Comment #4 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Fixed on trunk thus far. Backporting in a couple of days.
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From: "gingold at adacore dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #21 from Tristan Gingold <gingold at adacore dot com> ---
On 11/05/2017 09:44, iains at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Tristan Gingold from comment #19)
>> On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>>
>>> In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
>>>
>>> --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
>>> +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
>>> @@ -99,6 +99,8 @@
>>> ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
>>> # Unresolved warnings in specific files.
>>> ada/adaint.o-warn = -Wno-error
>>> +# For unwind-pe.h
>>> +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
>>>
>>> ada/%.o: ada/gcc-interface/%.c
>>> $(COMPILE) $<
>>>
>>> Isn't this wrong for darwin?
>>
>> Why ?
>>
>> The header unwind-pe.h is needed for the personality routine.
>
> What we need to do is to remove the (use of) libgcc_s and not use libgcc_eh
> (static-libgcc) for Darwin > 10, since the unwinder is now in
> usr/lib/system/libunwind.dylib.
>
> Needs two chunks (1) move the content for TLS emulation somewhere else, since
> that's a reason to need libgcc_s (2) adjust the use of libgcc for Darwin > 10
> to not include libgcc_eh for -static-libgcc. I have some patches for gcc-5 and
> 6 that do this, will forward-port them.
Great!
> I'm a little surprised that we need explicit -static-libstdc++ for gnat, the
> rest of the compiler already handles this?
We just need to remove -static-libgcc but keep -static-libstdc++
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 08:05:00 -0000
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
--cut here--
diff --git a/gcc/config/i386/sync.md b/gcc/config/i386/sync.md
index 20d46fe..d509be5 100644
--- a/gcc/config/i386/sync.md
+++ b/gcc/config/i386/sync.md
@@ -222,7 +222,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (2, operands[0])
&& rtx_equal_p (operands[4], adjust_address_nv (operands[2], DFmode, 0))"
- [(set (match_dup 3) (match_dup 5))]
+ [(set (match_dup 3) (match_dup 5))
+ (set (match_dup 4) (match_dup 3))]
"operands[5] = gen_lowpart (DFmode, operands[1]);")
(define_peephole2
@@ -235,7 +236,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (2, operands[0])
&& rtx_equal_p (operands[4], adjust_address_nv (operands[2], DFmode, 0))"
- [(set (match_dup 3) (match_dup 5))]
+ [(set (match_dup 3) (match_dup 5))
+ (set (match_dup 4) (match_dup 3))]
"operands[5] = gen_lowpart (DFmode, operands[1]);")
(define_expand "atomic_store<mode>"
--cut here--
Jakub, does the above patch fix the failure?
>From gcc-bugs-return-563197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 08:05:32 2017
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 08:10:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Simplified testcase:
/* PR target/80706 */
/* { dg-do run { target sse2_runtime } } */
/* { dg-options "-O2 -msse2" } */
union U { double value; struct S { int lsw; int msw; } parts; };
__attribute__((noinline, noclone)) double
foo (void)
{
__asm volatile ("" : : : "memory");
return 2.0;
}
__attribute__((noinline, noclone)) double
bar (void)
{
double s = foo ();
union U z;
z.value = s;
z.parts.lsw = 0;
return z.value * z.value + s * s;
}
int
main ()
{
if (bar () != 8.0)
__builtin_abort ();
return 0;
}
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 08:12:00 -0000
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--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #5)
--cut here--
diff --git a/gcc/config/i386/sync.md b/gcc/config/i386/sync.md
index 20d46fe..895a1ea 100644
--- a/gcc/config/i386/sync.md
+++ b/gcc/config/i386/sync.md
@@ -222,7 +222,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (2, operands[0])
&& rtx_equal_p (operands[4], adjust_address_nv (operands[2], DFmode, 0))"
- [(set (match_dup 3) (match_dup 5))]
+ [(set (match_dup 3) (match_dup 5))
+ (set (match_dup 4) (match_dup 3))]
"operands[5] = gen_lowpart (DFmode, operands[1]);")
(define_peephole2
@@ -235,7 +236,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (2, operands[0])
&& rtx_equal_p (operands[4], adjust_address_nv (operands[2], DFmode, 0))"
- [(set (match_dup 3) (match_dup 5))]
+ [(set (match_dup 3) (match_dup 5))
+ (set (match_dup 4) (match_dup 3))]
"operands[5] = gen_lowpart (DFmode, operands[1]);")
(define_expand "atomic_store<mode>"
@@ -338,7 +340,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (3, operands[2])
&& rtx_equal_p (operands[0], adjust_address_nv (operands[3], DFmode, 0))"
- [(set (match_dup 5) (match_dup 1))]
+ [(set (match_dup 5) (match_dup 1))
+ (set (match_dup 0) (match_dup 1))]
"operands[5] = gen_lowpart (DFmode, operands[4]);")
(define_peephole2
@@ -351,7 +354,8 @@
"!TARGET_64BIT
&& peep2_reg_dead_p (3, operands[2])
&& rtx_equal_p (operands[0], adjust_address_nv (operands[3], DFmode, 0))"
- [(set (match_dup 5) (match_dup 1))]
+ [(set (match_dup 5) (match_dup 1))
+ (set (match_dup 0) (match_dup 1))]
"operands[5] = gen_lowpart (DFmode, operands[4]);")
;; ??? You'd think that we'd be able to perform this via FLOAT + FIX_TRUNC
--cut here--
> Jakub, does the above patch fix the failure?
Bah, cut-n-pasto... the above should be correct patch.
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Thu, 11 May 2017 08:18:00 -0000
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--- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Tristan Gingold from comment #21)
> On 11/05/2017 09:44, iains at gcc dot gnu.org wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
> >
> > --- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> ---
> > (In reply to Tristan Gingold from comment #19)
> >> On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
> >>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
> >>
> >>> In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
> >>>
> >>> --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
> >>> +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
> >>> @@ -99,6 +99,8 @@
> >>> ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
> >>> # Unresolved warnings in specific files.
> >>> ada/adaint.o-warn = -Wno-error
> >>> +# For unwind-pe.h
> >>> +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
> >>>
> >>> ada/%.o: ada/gcc-interface/%.c
> >>> $(COMPILE) $<
> >>>
> >>> Isn't this wrong for darwin?
> >>
> >> Why ?
> >>
> >> The header unwind-pe.h is needed for the personality routine.
> >
> > What we need to do is to remove the (use of) libgcc_s and not use libgcc_eh
> > (static-libgcc) for Darwin > 10, since the unwinder is now in
> > usr/lib/system/libunwind.dylib.
> >
> > Needs two chunks (1) move the content for TLS emulation somewhere else, since
> > that's a reason to need libgcc_s (2) adjust the use of libgcc for Darwin > 10
> > to not include libgcc_eh for -static-libgcc. I have some patches for gcc-5 and
> > 6 that do this, will forward-port them.
>
> Great!
.. but might not be 'this week' ;-)
> > I'm a little surprised that we need explicit -static-libstdc++ for gnat, the
> > rest of the compiler already handles this?
>
> We just need to remove -static-libgcc but keep -static-libstdc++
OK. So looking at the breaking rev. (and to check I've understood correctly) -
the change switches gnat from using setjmp/longjmp to using DWARF unwinding
(and thus exposes the incompatibility)?
In the short-term, what ought to work is to ensure that -lSystem appears before
any -lgcc on the link line (so that the correct unwinder is used), and to
remove -static-libgcc.
TBH static-libgcc should actually work unless gnat is now pulling in any other
system libraries which cause two unwinders to be present - I guess it might be?
(probably, as an aside, we ought to look at putting libstdc++ on top of
libc++abi instead of libsupc++ - but that's on the TODO, no patches yet).
>From gcc-bugs-return-563200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 08:18:00 2017
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 08:19:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The #c5 patch obviously doesn't help here, because the testcase triggers the
last of these 4 peephole2s. But #c7 works.
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
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--- Comment #23 from Tristan Gingold <gingold at adacore dot com> ---
On 11/05/2017 10:11, iains at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Tristan Gingold from comment #21)
>> On 11/05/2017 09:44, iains at gcc dot gnu.org wrote:
>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>>>
>>> --- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> ---
>>> (In reply to Tristan Gingold from comment #19)
>>>> On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
>>>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>>>>
>>>>> In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
>>>>>
>>>>> --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
>>>>> +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
>>>>> @@ -99,6 +99,8 @@
>>>>> ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
>>>>> # Unresolved warnings in specific files.
>>>>> ada/adaint.o-warn = -Wno-error
>>>>> +# For unwind-pe.h
>>>>> +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
>>>>>
>>>>> ada/%.o: ada/gcc-interface/%.c
>>>>> $(COMPILE) $<
>>>>>
>>>>> Isn't this wrong for darwin?
>>>>
>>>> Why ?
>>>>
>>>> The header unwind-pe.h is needed for the personality routine.
>>>
>>> What we need to do is to remove the (use of) libgcc_s and not use libgcc_eh
>>> (static-libgcc) for Darwin > 10, since the unwinder is now in
>>> usr/lib/system/libunwind.dylib.
>>>
>>> Needs two chunks (1) move the content for TLS emulation somewhere else, since
>>> that's a reason to need libgcc_s (2) adjust the use of libgcc for Darwin > 10
>>> to not include libgcc_eh for -static-libgcc. I have some patches for gcc-5 and
>>> 6 that do this, will forward-port them.
>>
>> Great!
>
> .. but might not be 'this week' ;-)
>
>
>>> I'm a little surprised that we need explicit -static-libstdc++ for gnat, the
>>> rest of the compiler already handles this?
>>
>> We just need to remove -static-libgcc but keep -static-libstdc++
>
> OK. So looking at the breaking rev. (and to check I've understood correctly) -
> the change switches gnat from using setjmp/longjmp to using DWARF unwinding
> (and thus exposes the incompatibility)?
Yes.
> In the short-term, what ought to work is to ensure that -lSystem appears before
> any -lgcc on the link line (so that the correct unwinder is used), and to
> remove -static-libgcc.
Might work too.
> TBH static-libgcc should actually work unless gnat is now pulling in any other
> system libraries which cause two unwinders to be present - I guess it might be?
No, I think static-libgcc cannot work because it is not able to get the
address of the unwind tables (on recent Darwin versions).
> (probably, as an aside, we ought to look at putting libstdc++ on top of
> libc++abi instead of libsupc++ - but that's on the TODO, no patches yet).
Hum, yes.
>From gcc-bugs-return-563204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 08:27:28 2017
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Subject: [Bug tree-optimization/80705] Incorrect code generated for profile counter updates due to SLP+LIM
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Aww. Probably fallout of the DECL_NONALIASED "hack". We likely have to
restrict vectorizing / IVOPTing those.
Basically we want to be able to apply store motion to counter updates which
means we have to be able to disambiguate counter loads/stores against other
memory accesses.
I'll see what exactly happens here (just guessing above).
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Subject: [Bug c++/80683] Exceptions don't propagate through default member initializer
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--- Comment #5 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
The issue is in cp/method.c:
/* If that user-written default constructor would satisfy the
requirements of a constexpr constructor (7.1.5), the
implicitly-defined default constructor is constexpr.
The implicitly-defined copy/move assignment operator is constexpr if
- X is a literal type, and
- the assignment operator selected to copy/move each direct base class
subobject is a constexpr function, and
- for each non-static data member of X that is of class type (or array
thereof), the assignment operator selected to copy/move that
member is a constexpr function. */
if (constexpr_p)
*constexpr_p = ctor_p || (assign_p && cxx_dialect >= cxx14);
But if we have default member initializers, the implicitly-defined default
constructor can not be constexpr. We have to check it.
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #8)
> The #c5 patch obviously doesn't help here, because the testcase triggers the
> last of these 4 peephole2s. But #c7 works.
Thanks! It looks like we'll have to live with extra stores then...
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Subject: [Bug c++/46476] Missing Warning about unreachable code after return
Date: Thu, 11 May 2017 08:47:00 -0000
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--- Comment #11 from Jon Grant <jg at jguk dot org> ---
Perhaps some new static analysis tools could be added to GCC. I'd be happy to
contribute to costs.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 08:59:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > The #c5 patch obviously doesn't help here, because the testcase triggers the
> > last of these 4 peephole2s. But #c7 works.
>
> Thanks! It looks like we'll have to live with extra stores then...
Can't we improve it in the combiner?
For PR71245 testcase obviously, we have:
(insn 5 2 6 2 (parallel [
(set (reg:DI 89 [ _4 ])
(unspec:DI [
(mem/v:DI (symbol_ref:SI ("d") [flags 0x2] <var_decl
0x7fcf8ee5c510 d>) [-1 S8 A64])
] UNSPEC_LDA))
(clobber (mem/c:DI (plus:SI (reg/f:SI 20 frame)
(const_int -8 [0xfffffffffffffff8])) [0 S8 A64]))
(clobber (scratch:DF))
]) "/usr/include/c++/6.3.1/atomic":235 4970 {atomic_loaddi_fpu}
(nil))
...
(insn 8 7 9 2 (set (reg:DF 91)
(plus:DF (subreg:DF (reg:DI 89 [ _4 ]) 0)
(reg:DF 92))) "pr71245.C":5 805 {*fop_df_comm}
(expr_list:REG_DEAD (reg:DF 92)
(expr_list:REG_DEAD (reg:DI 89 [ _4 ])
(nil))))
and apparently the combiner attempts to match:
(set (reg:DF 92)
(subreg:DF (unspec:DI [
(mem/v:DI (symbol_ref:SI ("d") [flags 0x2] <var_decl
0x7fcf8ee5c510 d>) [-1 S8 A64])
] UNSPEC_LDA) 0))
Perhaps if we had such a pattern that we'd split into a normal DFmode load
(perhaps with unspec before reload to guarantee it is atomic load), we wouldn't
need the temporary at all?
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Subject: [Bug tree-optimization/80705] Incorrect code generated for profile counter updates due to SLP+LIM
Date: Thu, 11 May 2017 09:49:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, SLP seems fine here, on x86_64 needs -fno-vect-cost-model to vectorize it.
LIM also looks fine on x86 (does nothing) so it must be IVOPTs messing up the
refs on ppc64le. Ah, on ppc64le:
vect_cst__43 = {__gcov0.foo_I_lsm.13_187, __gcov0.foo_I_lsm.10_168};
vect_cst__152 = {__gcov0.foo_I_lsm.11_105, __gcov0.foo_I_lsm.12_164};
vect_cst__178 = {__gcov0.foo_I_lsm.14_204, PROF_edge_counter_193};
MEM[(long int *)&__gcov0.foo + 32B] = vect_cst__178;
_198 = &__gcov0.foo[4] + 16;
MEM[(long int *)_198] = vect_cst__152;
_39 = _198 + 16;
MEM[(long int *)_39] = vect_cst__43;
actually similar on x86_64 without AVX:
vect_cst__174 = {__gcov0.foo_I_lsm.10_109, __gcov0.foo_I_lsm.11_164};
vect_cst__36 = {__gcov0.foo_I_lsm.12_147, PROF_edge_counter_167};
MEM[(long int *)&__gcov0.foo + 24B] = vect_cst__36;
_181 = &__gcov0.foo[3] + 16;
MEM[(long int *)_181] = vect_cst__174;
the last ref is problematic as it aliases __gcov0.foo and that is not allowed.
I presume that vectorizing the counter update stores isn't really useful
anyway,
so the easiest thing may be to simply not allow vectorizing DECL_NONALIASED
refs.
Index: gcc/tree-vect-data-refs.c
===================================================================
--- gcc/tree-vect-data-refs.c (revision 247879)
+++ gcc/tree-vect-data-refs.c (working copy)
@@ -3957,6 +4023,27 @@ again:
datarefs[i] = dr;
}
+ if (TREE_CODE (DR_BASE_ADDRESS (dr)) == ADDR_EXPR
+ && DECL_P (TREE_OPERAND (DR_BASE_ADDRESS (dr), 0))
+ && DECL_NONALIASED (TREE_OPERAND (DR_BASE_ADDRESS (dr), 0)))
+ {
+ if (dump_enabled_p ())
+ {
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "not vectorized: base object not addressable "
+ "for stmt: ");
+ dump_gimple_stmt (MSG_MISSED_OPTIMIZATION, TDF_SLIM, stmt, 0);
+ }
+ if (is_a <bb_vec_info> (vinfo))
+ {
+ /* In BB vectorization the ref can still participate
+ in dependence analysis, we just can't vectorize it. */
+ STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+ continue;
+ }
+ return false;
+ }
+
/* Set vectype for STMT. */
scalar_type = TREE_TYPE (DR_REF (dr));
STMT_VINFO_VECTYPE (stmt_info)
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From: "tamas.bela.feher at ipp dot mpg.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80708] New: [f08] ALLOCATE with MOLD error if source-expr is a derived type with null-init pointer component
Date: Thu, 11 May 2017 09:50:00 -0000
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Bug ID: 80708
Summary: [f08] ALLOCATE with MOLD error if source-expr is a
derived type with null-init pointer component
Product: gcc
Version: 8.0
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Dear GFortran Team,
For the following program:
program mold_dtype_with_pointer_component
implicit none
type t
real, dimension(:), pointer :: p => null()
end type
type(t), dimension(3:4) :: array
type(t), allocatable, dimension(:) :: h
allocate(H, mold=array)
end program
GFortran (versions 6.3.0 and 8.0.0 20170427) gives the following error message:
gfortran mold_dtype_pointer.f90
mold_dtype_pointer.f90:8:11:
allocate(H, mold=array)
1
Error: Array specification or array-valued SOURCE= expression required in
ALLOCATE statement at (1)
The error disappears if the null-init for pointer p is removed, or if MOLD is
replaced with SOURCE. I would expect that the program compiles even in its
original form.
Best regards,
Tamas
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Subject: [Bug tree-optimization/53090] suboptimal ivopt
Date: Thu, 11 May 2017 10:07:00 -0000
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--- Comment #9 from amker at gcc dot gnu.org ---
Author: amker
Date: Thu May 11 09:50:15 2017
New Revision: 247893
URL: https://gcc.gnu.org/viewcvs?rev=247893&root=gcc&view=rev
Log:
PR tree-optimization/53090
* tree-ssa-loop-ivopts.c (enum comp_iv_rewrite): New enum value
COMP_IV_EXPR_2.
(extract_cond_operands): Detect condition with IV on both sides
and return COMP_IV_EXPR_2.
(find_interesting_uses_cond): Add iv_use for both IVs in condition.
(rewrite_use_compare): Simplify by removing call to function
extract_cond_operands.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-loop-ivopts.c
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #15 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #14)
> (In reply to Marek Polacek from comment #13)
> > This is true, but it happens very rarely. It can happen e.g. when the
> > fold() call in save_expr() folds away the first operand of a COMPOUND_EXPR,
> > and the second operand is e.g.
>
> Can't it happen say if you have save_expr called with (0 * i) + (0 * j) + (0
> * k) or whatever similar initially complex, but after folding very simple
> and obviously invariant?
In C I don't think so, because we mostly call c_save_expr and c_fully_fold
therein would fold that expression to 0. And when we call save_expr, it's when
in_late_binary_op so the operands have already been folded. There's one case,
though, where we call save_expr without previous folding, and that's when
constructing a VLA whose size is a sizeof of another VLA in grokdeclarator:
6097 /* Arrange for the SAVE_EXPR on the inside of the
6098 MINUS_EXPR, which allows the -1 to get folded
6099 with the +1 that happens when building TYPE_SIZE.
*/
6100 if (size_varies)
6101 size = save_expr (size);
void
f (int i)
{
int (*a)[i];
int x[sizeof (*a)];
}
I wouldn't worry much about that.
> > But even if I add this to fold or c_fully_fold, we don't have any guarantees
> > that any of these will be called before gimplification, right? So most
> > likely we'd end up with the new SAVE_EXPR in the gimplifier, which, as you
> > point out, is not that bad.
>
> I think cp_fold should handle SAVE_EXPR (by cp_folding the operand, and if
> it is invariant or invariant after skipping simple arith, returning that
> folded operand, otherwise making sure to add the SAVE_EXPR into the
> fold_cache giving
> the SAVE_EXPR itself. Right now cp_fold ignores SAVE_EXPR, but cp_fold_r
> handles it, but that one doesn't do much good, because it cp_folds the
> operands only after folding the containing trees.
I'm testing this. Judging by running the C++ testsuite, it basically never
happens that we're able to cp_fold the content of a SAVE_EXPR to an invariant,
although it happens e.g. with this test:
int
foo (int i)
{
return ((0 * i * (unsigned long long) (-0 + 1UL)) * 2) % 1;
}
so it probably makes sense to add the cp_fold bits.
Thanks.
>From gcc-bugs-return-563212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:07:27 2017
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 10:25:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #10)
> Perhaps if we had such a pattern that we'd split into a normal DFmode load
> (perhaps with unspec before reload to guarantee it is atomic load), we
> wouldn't need the temporary at all?
--- gcc/config/i386/predicates.md.jj 2017-01-01 12:45:42.000000000 +0100
+++ gcc/config/i386/predicates.md 2017-05-11 11:42:17.649136648 +0200
@@ -1657,3 +1657,14 @@ (define_predicate "register_or_constm1_o
(ior (match_operand 0 "register_operand")
(and (match_code "const_int")
(match_test "op == constm1_rtx"))))
+
+;; Return true if OP is a memory_operand, including volatile MEM.
+(define_predicate "volatile_memory_operand"
+ (match_code "mem,subreg")
+{
+ int save_volatile_ok = volatile_ok;
+ volatile_ok = 1;
+ bool ret = memory_operand (op, mode);
+ volatile_ok = save_volatile_ok;
+ return ret;
+})
--- gcc/config/i386/sync.md.jj 2017-05-11 10:16:03.000000000 +0200
+++ gcc/config/i386/sync.md 2017-05-11 11:42:45.777767179 +0200
@@ -210,6 +210,17 @@ (define_insn_and_split "atomic_loaddi_fp
DONE;
})
+(define_insn_and_split "*atomic_loaddf_fpu"
+ [(set (match_operand:DF 0 "nonimmediate_operand" "=x,f")
+ (subreg:DF (unspec:DI [(match_operand:DI 1 "volatile_memory_operand"
+ "m,m")]
+ UNSPEC_LDA) 0))]
+ "!TARGET_64BIT && (TARGET_80387 || TARGET_SSE)"
+ "#"
+ "&& 1"
+ [(set (match_dup 0) (match_dup 1))]
+ "operands[1] = gen_lowpart (DFmode, operands[1]);")
+
(define_peephole2
[(set (match_operand:DF 0 "fp_register_operand")
(unspec:DF [(match_operand:DI 1 "memory_operand")]
does that, unfortunately combine still fails, because the insn it wants to
match afterwards is:
(set (reg:DF 91)
(plus:DF (reg:DF 92)
(const_double:DF 1.0e+0 [0x0.8p+1])))
But the above patch at least helps a little bit on following testcase:
typedef union
{
unsigned long long ll;
double d;
} u_t;
u_t d = { .d = 5.0 };
void foo_d (double x)
{
u_t tmp;
tmp.ll = __atomic_load_n (&d.ll, __ATOMIC_SEQ_CST);
tmp.d += x;
__atomic_store_n (&d.ll, tmp.ll, __ATOMIC_SEQ_CST);
}
Before the #c7 patch, we get:
fldl d
faddl 24(%esp)
fstpl d
lock; orl $0, (%esp)
with just the #c7 patch we get:
fldl d
fstl (%esp)
faddl 24(%esp)
fstl d
fstpl (%esp)
lock; orl $0, (%esp)
so 2 useless stores. With #c7 and this patch we get:
fldl d
faddl 24(%esp)
fstl d
fstpl (%esp)
lock; orl $0, (%esp)
i.e. one useless store. So, either we need combine or some other pre-reload
pass to figure out we have all uses of the atomic_loaddi_fpu pattern as
(subreg:DF (reg:DI ...)) and optimize that into the atomic_loaddf_fpu pattern
with uses changed into just the DFmode pseudo. Allowing =f in
atomic_loaddi_fpu won't work, as DImode is not VALID_FP_MODE_P.
>From gcc-bugs-return-563213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:25:08 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Thu, 11 May 2017 10:27:00 -0000
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--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Like most ghost stories, this one is based on superstition and fantasy, not
facts or science:
https://www.reddit.com/r/programming/comments/69g8il/the_horror_in_the_standard_library/dhb2las/
No libstdc++ bug here, nothing to see, move along.
>From gcc-bugs-return-563215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:27:31 2017
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Subject: [Bug rtl-optimization/80693] [6/7/8 Regression] wrong code with -O -fno-tree-coalesce-vars
Date: Thu, 11 May 2017 10:33:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-11
CC| |aoliva 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 r226901.
>From gcc-bugs-return-563216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:33:41 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #15)
> In C I don't think so, because we mostly call c_save_expr and c_fully_fold
> therein would fold that expression to 0. And when we call save_expr, it's
Yeah, I know that, and I think it is a serious bug. With the c_fully_fold in
c_save_expr the C FE is not doing anything close to delayed folding, it folds
immediately whenever we might need a save_expr, the old trees gone.
So I think it would be nice to kill c_save_expr, just use save_expr, and let
c_fully_fold fold SAVE_EXPR operand (just once, not many times).
>From gcc-bugs-return-563217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:39:35 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #17 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #16)
> (In reply to Marek Polacek from comment #15)
> > In C I don't think so, because we mostly call c_save_expr and c_fully_fold
> > therein would fold that expression to 0. And when we call save_expr, it's
>
> Yeah, I know that, and I think it is a serious bug. With the c_fully_fold
> in c_save_expr the C FE is not doing anything close to delayed folding, it
> folds immediately whenever we might need a save_expr, the old trees gone.
> So I think it would be nice to kill c_save_expr, just use save_expr, and let
> c_fully_fold fold SAVE_EXPR operand (just once, not many times).
I agree. I'll try (guess we'll need the fold cache). That can be a separate
project, though.
>From gcc-bugs-return-563218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:45:02 2017
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Subject: [Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #17)
> (In reply to Jakub Jelinek from comment #16)
> > (In reply to Marek Polacek from comment #15)
> > > In C I don't think so, because we mostly call c_save_expr and c_fully_fold
> > > therein would fold that expression to 0. And when we call save_expr, it's
> >
> > Yeah, I know that, and I think it is a serious bug. With the c_fully_fold
> > in c_save_expr the C FE is not doing anything close to delayed folding, it
> > folds immediately whenever we might need a save_expr, the old trees gone.
> > So I think it would be nice to kill c_save_expr, just use save_expr, and let
> > c_fully_fold fold SAVE_EXPR operand (just once, not many times).
>
> I agree. I'll try (guess we'll need the fold cache). That can be a
> separate project, though.
See above, if it is just about SAVE_EXPR, the C FE could just grab one of the
many spare bits on SAVE_EXPR for a flag whether the operand has been
c_fully_folded already.
>From gcc-bugs-return-563219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 10:49:40 2017
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Subject: [Bug testsuite/80580] GIMPLEFE ICE on invalid code (fuzz testing)
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--- Comment #2 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Author: miyuki
Date: Thu May 11 10:48:54 2017
New Revision: 247899
URL: https://gcc.gnu.org/viewcvs?rev=247899&root=gcc&view=rev
Log:
GIMPLEFE: Handle invalid unary "*" operand type
gcc/c/
PR testsuite/80580
* gimple-parser.c (c_parser_gimple_unary_expression): Check argument
type of unary '*'.
gcc/testsuite/
PR testsuite/80580
* gcc.dg/gimplefe-error-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/gimplefe-error-4.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/gimple-parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/79787] ICE in remove_unreachable_nodes, at ipa.c:469
Date: Thu, 11 May 2017 10:55:00 -0000
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Alexander Ivchenko <aivchenk at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aivchenk at gmail dot com
--- Comment #2 from Alexander Ivchenko <aivchenk at gmail dot com> ---
Reduced testcase:
inline __attribute__((__always_inline__)) __attribute__ ((target("bmi"))) int
fn1() {}
__attribute__((__always_inline__)) __attribute__ ((target("bmi"))) int fn2() {
fn1(); }
int fn3() { return fn1(); }
Initial call graph:
fn3 -(not inlinable because of attribute mismatch)-> fn1<bmi>
fn2<bmi> -> fn1<bmi>
Call graph before chkp_ecleanup
fn3 -> fn3.chkp -(not inlinable because of attribute mismatch)-> fn1.chkp <bmi>
fn2.chkp <bmi> -> fn1.chkp <bmi>
fn2<bmi> (fn1 is inlined here)
When compiler inlines fn1 to fn2 in expand_call_inline, it removes fn1 cnode,
as it is no longer needed.
There it execute this code (in cgraph_node::remove):
if (instrumented_version)
{
instrumented_version->instrumented_version = NULL;
instrumented_version = NULL;
}
Hence, now fn1.chkp.instrumened_version==NULL and fn1 is removed.
And later on in chkp_cleanup in reachability analysis in
symbol_table::remove_unreachable_nodes
we fail on this assert, where cnode==fn1.chkp
/* For instrumentation clones we always need original
function node for proper LTO privatization. */
if (cnode->instrumentation_clone
&& cnode->definition)
{
=> gcc_assert (cnode->instrumented_version || in_lto_p);
(since fn1 is removed, we don't consider it in chkp_produce_thunks
(early=false))
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Subject: [Bug testsuite/80580] GIMPLEFE ICE on invalid code (fuzz testing)
Date: Thu, 11 May 2017 10:56:00 -0000
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--- Comment #3 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Author: miyuki
Date: Thu May 11 10:55:52 2017
New Revision: 247900
URL: https://gcc.gnu.org/viewcvs?rev=247900&root=gcc&view=rev
Log:
GIMPLEFE: handle invalid __MEM
gcc/c/
PR testsuite/80580
* gimple-parser.c (c_parser_gimple_postfix_expression): Handle
incorrect __MEM syntax.
gcc/testsuite/
PR testsuite/80580
* gcc.dg/gimplefe-error-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/gimplefe-error-5.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/gimple-parser.c
trunk/gcc/testsuite/ChangeLog
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Thu, 11 May 2017 10:56:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #6)
> I'm sorry, I still can't recreate it. I'm now at SVN revision 247848.
>
> Note that I just committed a number of changes to the Go frontend, and I was
> using those changes when I tested before. I don't see why they would affect
> this, but perhaps they do. If that is the case, then you will no longer see
> a problem either.
>
> I edited the gcc_checking_assert at symtab.c:1865 to be a plain gcc_assert,
> though I think that shouldn't matter.
>
> This is what I see:
>
> > gccgo -flto pr64238/bytes_decl.go pr64238/bytes.go
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Count: error:
> undefined reference to 'go.bytes.IndexByte'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Count: error:
> undefined reference to 'go.bytes.Equal'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
> undefined reference to 'go.bytes.IndexByte'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
> undefined reference to 'go.bytes.IndexByte'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.Index: error:
> undefined reference to 'go.bytes.Equal'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function go.bytes.LastIndex:
> error: undefined reference to 'go.bytes.Equal'
> /tmp/ccerLD54.ltrans0.ltrans.o:<artificial>:function bytes.genSplit: error:
> undefined reference to 'go.bytes.Equal'
> collect2: error: ld returned 1 exit status
>
> > gccgo -flto pr64238/bytes_decl.go pr64238/bytes.go -fgo-pkgpath=bytes
> > echo $?
> 0
I can confirm that current trunk works fine. However GCC 7.1 is affected.
Can you reproduce it for 7.1? Are you planning to backport some patches in
order to fix the release?
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Subject: [Bug c/69960] "initializer element is not constant"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
C++ FE's constexpr.c has bool lval argument to many recursive functions, so it
can differentiate between cases where you don't want to fold "str"[0] to 's'
and cases where you can do that. It is among other cases set when processing
ADDR_EXPR's operand. But c_fully_fold_internal doesn't have anything like
that, so that would need to be introduced there.
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Subject: [Bug c/69960] "initializer element is not constant"
Date: Thu, 11 May 2017 11:32:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #14)
> C++ FE's constexpr.c has bool lval argument to many recursive functions, so
> it can differentiate between cases where you don't want to fold "str"[0] to
> 's' and cases where you can do that. It is among other cases set when
> processing ADDR_EXPR's operand. But c_fully_fold_internal doesn't have
> anything like that, so that would need to be introduced there.
>From the related PR66618, it seems that if we had such an argument properly
propagated, we could as well use decl_constant_value_for_optimization during
c_fully_fold_internal (if not pedantic?) centrally for VAR_DECLs, rather then
just using it on selected operands where we basically know for sure we don't
need an lvalue.
Without such changes, a hack could be to add the ARRAY_REF of STRING_CST with
constant index folding into decl_constant_value_for_optimization.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Thu, 11 May 2017 12:04:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
There's link to docker image that illustrates that for 7.1:
https://hub.docker.com/r/marxin/docker-gcc-pr64238/builds/buqt3slnzjlvm858fg6j78t/
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80709] New: ICE in setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
Date: Thu, 11 May 2017 12:13:00 -0000
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Bug ID: 80709
Summary: ICE in
setup_preferred_alternate_classes_for_new_pseudos, at
ira.c:2772
Product: gcc
Version: 7.0
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Host: x86_64-linux-gnu
Target: arm-linux-gnueabihf
Using cross-compiler I see:
$ cat ~/Programming/testcases/arm.ii
typedef int a __attribute__ ((vector_size (16)));
constexpr a b[]{};
a c;
a d[]{};
void
abort ()
{
int f = 0;
for (;; ++f)
{
a e = __builtin_shuffle (b[f], c, d[f]);
if (__builtin_memcmp (&e, &f, sizeof (a)))
abort ();
}
}
$ ./xgcc -B. ~/Programming/testcases/arm.ii -O2
/home/marxin/Programming/testcases/arm.ii: In function ‘void abort()’:
/home/marxin/Programming/testcases/arm.ii:12:28: warning: ‘int
__builtin_memcmp_eq(const void*, const void*, unsigned int)’ reading 16 bytes
from a region of size 4 [-Wstringop-overflow=]
if (__builtin_memcmp (&e, &f, sizeof (a)))
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/testcases/arm.ii:15:1: internal compiler error: in
setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
}
^
0xee88e1 setup_preferred_alternate_classes_for_new_pseudos
../../gcc/ira.c:2772
0xee89d8 expand_reg_info
../../gcc/ira.c:2799
0xeef7a1 ira
../../gcc/ira.c:5333
0xeefed6 execute
../../gcc/ira.c:5613
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Thu, 11 May 2017 12:18:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-05-11
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--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
Confirmed. I'll have a look.
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 41339
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41339&action=edit
Patch to prevent unwanted peephole2 matching
Instead of using generic SSE move patterns, attached patch implements and uses
loaddi_via_sse and storedi_via_sse specialized patterns.
This effectively prevents unwanted peephole2 matching.
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Subject: [Bug fortran/80708] [f08] ALLOCATE with MOLD error if source-expr is a derived type with null-init pointer component
Date: Thu, 11 May 2017 12:28:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed for 6.3.0, 7.1.0, and trunk (8.0). With 5.4.0 the error is
Error: Array specification required in ALLOCATE statement at (1)
The new error has been introduced at revision r234714.
>From gcc-bugs-return-563230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 12:28:16 2017
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Subject: [Bug testsuite/80580] GIMPLEFE ICE on invalid code (fuzz testing)
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--- Comment #4 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Author: miyuki
Date: Thu May 11 12:27:37 2017
New Revision: 247903
URL: https://gcc.gnu.org/viewcvs?rev=247903&root=gcc&view=rev
Log:
GIMPLEFE: Handle invalid SSA names
gcc/testsuite/
PR testsuite/80580
* gcc.dg/gimplefe-error-6.c: New test.
gcc/c/
PR testsuite/80580
* gimple-parser.c (c_parser_parse_ssa_name): Validate SSA name base.
Added:
trunk/gcc/testsuite/gcc.dg/gimplefe-error-6.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/gimple-parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 12:42:00 -0000
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41340
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41340&action=edit
gcc8-pr80706.patch
I came up with this (in addition to #c7). This removes one of the two useless
stores in the original pr71245-1.c testcase and restores the above pr71245-1.c
modification to what it used to look before (well, even better, as it reserves
smaller stack).
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From: "dr.markus.hoffmann at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80710] New: Stack smashing detected in correct code depending on optimization flag
Date: Thu, 11 May 2017 13:01:00 -0000
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Bug ID: 80710
Summary: Stack smashing detected in correct code depending on
optimization flag
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dr.markus.hoffmann at gmx dot de
Target Milestone: ---
Stack smashing detected if the code is compiled with -O1 or with
-fomit-frame-pointer. Everything fine, when compiled without optimization or
with -fno-omit-frame-pointer
Example code follows:
[code]
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
typedef struct {
int a;
int b;
int c;
int d;
} A;
A test2(int n) {
A ret;
printf("Hello n=%d\n",n);
ret.a=1;
ret.b=2;
ret.c=3;
return(ret);
}
#define GTT_SIZE 8
typedef struct {long feld[GTT_SIZE];} GTT;
long (*adr)(GTT);
void dummy() {
long ret;
GTT gtt;
A t;
int i;
printf("adr t: %p\n",&t);
for(i=0;i<GTT_SIZE;i++) gtt.feld[i]=i;
gtt.feld[0]=(long)&t;
gtt.feld[1]=5;
adr=(long (*)(GTT))test2;
ret=adr(gtt);
printf("Function returned: 0x%x\n",(unsigned int)ret);
if(ret==(long)&t) printf("This is adress of t\n");
printf("Function ret: %d %d %d\n",t.a,t.b,t.c);
printf("original stack: \n");
for(i=0;i<GTT_SIZE;i++) {
printf("%d : $%x\n",i,(unsigned int)gtt.feld[i]);
}
// >>>>>>>The ERROR is triggered here !!!!!
}
int main() {
printf("This is main.\n");
dummy();
// <<<<<<< this will never be reached.
printf("End of main.\n");
}
[/code]
Output: (normal case
[code]
This is main.
adr t: 0xbfd76d7c
Hallo n=5
Function returned: 0xbfd76d7c
This is adress of t
Function ret: 1 2 3
original stack:
0 : $bfd76d7c
1 : $5
2 : $2
3 : $3
4 : $4
5 : $5
6 : $6
7 : $7
End of main.
[/code]
Output if comiled with "gcc -fomit-frame-pointer a.c"
[code]
This is main.
adr t: 0xbfa1f30c
Hallo n=5
Function returned: 0xbfa1f30c
This is adress of t
Function ret: 2 3 0
original stack:
0 : $5
1 : $2
2 : $3
3 : $4
4 : $5
5 : $6
6 : $7
7 : $9fc2c100
*** stack smashing detected ***: ./a.out terminated
Abort
[/code]
The latter should not happen and is considered as a bug in gcc.
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From: "bernd at net2o dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Thu, 11 May 2017 13:18:00 -0000
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Bernd Paysan <bernd at net2o dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |5.0
--- Comment #14 from Bernd Paysan <bernd at net2o dot de> ---
(In reply to Jonathan Wakely from comment #13)
> No libstdc++ bug here, nothing to see, move along.
Haha.
So I sum up: mt_allocator was made non-default after Version 5.x. Don't use
mt_allocator. We know it's not good enough, but won't fix it. Work on improving
glibc's malloc is on-going.
I therefore assigned that bug to libstdc++ version 5.0.
I'm sorry for the time wasted, but I think it is necessary to squish out that
sort of bug, whether real or ghost. And the misleading documentation was also
fixed.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80658
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|5.0 |unknown
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Paysan from comment #14)
> I therefore assigned that bug to libstdc++ version 5.0.
Um no, it was changed more than ten years ago.
>From gcc-bugs-return-563235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 13:20:09 2017
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Subject: [Bug libstdc++/80658] Memory leak reported in libstdc++ (zerotier)
Date: Thu, 11 May 2017 13:21:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, mt allocator has problems, that's why we stopped using it in 2005, but the
zerotier code isn't even using mt allocator. Their problem is probably
something different.
That's the problem with writing ghost stories instead of bug reports: ghosts
aren't real.
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Subject: [Bug libstdc++/80285] `std::make_shared` performs two separate allocations with `-fno-rtti`
Date: Thu, 11 May 2017 13:32:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu May 11 13:21:07 2017
New Revision: 247905
URL: https://gcc.gnu.org/viewcvs?rev=247905&root=gcc&view=rev
Log:
PR libstdc++/80285 optimize std::make_shared for -fno-rtti
PR libstdc++/80285
* include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_ti): Define
function to get unique fake std::type_info reference.
(_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Compare to
_S_ti() fake reference.
(__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Share
single implementation with or without RTTI enable.
[!__cpp_rtti]: Pass fake reference to _M_get_deleter.
* testsuite/20_util/shared_ptr/creation/alloc.cc: Change expected
allocation and deallocation counts.
* testsuite/20_util/shared_ptr/creation/single_allocation.cc: New.
* testsuite/20_util/shared_ptr/creation/single_allocation_no_rtti.cc:
New.
Added:
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/creation/single_allocation.cc
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/creation/single_allocation_no_rtti.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/shared_ptr_base.h
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/creation/alloc.cc
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Subject: [Bug libstdc++/79433] __has_include(<new header>) is true but #include <new header> gives #error when -std=old
Date: Thu, 11 May 2017 13:39:00 -0000
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--- Comment #22 from Marc Mutz <marc.mutz at kdab dot com> ---
(In reply to Jonathan Wakely from comment #18)
> I've started a discussion about changing the SD-6 recommendations.
>
> One idea that came out of the discussion so far would be to make a
> GCC-specific extension to __has_include. If the has-includes-expression
> finds a file then it could read the first line of the file to look for
> something like:
>
> #pragma GCC has_include(constant-expression)
>
> If found, the result of the has-include-expression would be 1 if the
> constant-expression is non-zero, and 0 otherwise.
>
> Then we could decorate our C++17 headers with:
>
> #pragma GCC has_include(__cplusplus > 201402L)
>
> and __has_include would magically give the right answer.
Would that make its way into GCC 7, so we (Qt) could rely on it working at
least for the C++17 headers (C++14 didn't add many/any)?
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Thu, 11 May 2017 13:51:00 -0000
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--- Comment #24 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Le 11 mai 2017 à 09:06, gingold at adacore dot com <gcc-bugzilla@gcc.gnu.org> a écrit :
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> --- Comment #19 from Tristan Gingold <gingold at adacore dot com> ---
> On 10/05/2017 18:04, dominiq at lps dot ens.fr wrote:
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
>> In the commit r247301 I see in gcc/ada/gcc-interface/Make-lang.in
>>
>> --- trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:44:28 247300
>> +++ trunk/gcc/ada/gcc-interface/Make-lang.in 2017/04/27 09:48:45 247301
>> @@ -99,6 +99,8 @@
>> ada-warn = $(ADA_CFLAGS) $(filter-out -pedantic, $(STRICT_WARN))
>> # Unresolved warnings in specific files.
>> ada/adaint.o-warn = -Wno-error
>> +# For unwind-pe.h
>> +CFLAGS-ada/raise-gcc.o += -I$(srcdir)/../libgcc -Iinclude
>>
>> ada/%.o: ada/gcc-interface/%.c
>> $(COMPILE) $<
>>
>> Isn't this wrong for darwin?
>
> Why ?
I cannot distinguish -I (for include) and -l (for libs) on my browser, hence
the mistake.
Note that
--with-stage1-ldflags=-static-libstdc++
--with-boot-ldflags=-static-libstdc++
does not work if the install directory is empty:
dyld: Symbol not found: __ZdlPvm
Referenced from: /opt/gcc/p_build/gcc/build/genmddeps (which was built for
Mac OS X 10.12)
Expected in: /usr/lib/libstdc++.6.dylib
in /opt/gcc/p_build/gcc/build/genmddeps
Dominique
>
> The header unwind-pe.h is needed for the personality routine.
>
> --
> You are receiving this mail because:
> You reported the bug.
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Thu, 11 May 2017 14:03:00 -0000
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--- Comment #25 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #24)
> > Le 11 mai 2017 à 09:06, gingold at adacore dot com <gcc-bugzilla@gcc.gnu.org> a écrit :
>
> Note that
>
> --with-stage1-ldflags=-static-libstdc++
> --with-boot-ldflags=-static-libstdc++
>
> does not work if the install directory is empty:
That's actually a different problem, what you're seeing there is that
-static-libstdc++ is ignored on Darwin (dropped silently)...
... I.e. -static-libstdc++ only works on Darwin with a patch which I got fed
up with pinging after 4 or so times.
NOTE: AFAIR clang doesn't support that option anyway, so it would not be
available at stage 1 where clang is the bootstrap compiler.
However, the existing compiler build process points explicitly to the
just-built libstdc++ convenience lib IIRC (the built tools are statically
linked with the lib). So that info ought to be available to the Ada build (I'm
pretty sure all the -B etc. is passed through).
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Subject: [Bug middle-end/71509] Bitfield causes load hit store with larger store than load
Date: Thu, 11 May 2017 14:08:00 -0000
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Doing an 8 byte load of something that was stored as 4 byte immediately
before will cause flushes and stalls... Yeah it could use a 4-byte load
here afaics.
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Subject: [Bug tree-optimization/80705] Incorrect code generated for profile counter updates due to SLP+LIM
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 11 14:08:07 2017
New Revision: 247906
URL: https://gcc.gnu.org/viewcvs?rev=247906&root=gcc&view=rev
Log:
2017-05-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/80705
* tree-vect-data-refs.c (vect_analyze_data_refs): DECL_NONALIASED
bases are not vectorizable.
* gcc.dg/vect/bb-slp-pr80705.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/bb-slp-pr80705.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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Subject: [Bug tree-optimization/80705] Incorrect code generated for profile counter updates due to SLP+LIM
Date: Thu, 11 May 2017 14:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-563243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:10:35 2017
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Subject: [Bug libstdc++/79433] __has_include(<new header>) is true but #include <new header> gives #error when -std=old
Date: Thu, 11 May 2017 14:15:00 -0000
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--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, because after discussion with the feature-test study group I don't want to
rely on GCC-specific magic. Instead I think it would be better for headers to
do:
#if __cplusplus >= 201402L
#define __cpp_lib_some_feature YYYYMM
...
#endif
That would mean including the header doesn't give an error, but you need to
test for both the header and a feature-test macro to know if the feature is
really available. i.e. existence of a header doesn't imply anything except that
the header can be included without error.
This needs a proposal to the study group and a change to SD-6 (currently
detection of many features only uses __has_include and there's no macro that
can be tested) and then changes to GCC to remove the #error directives (so we
allow inclusion, but define nothing when included with the wrong -std mode).
None of that has been decided on yet, so it's not possible to say if some
hypothetical idea would be backported to gcc-7-branch. There's nothing to
backport yet.
(N.B. C++14 added one new header, <shared_mutex>)
>From gcc-bugs-return-563244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:15:59 2017
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Subject: [Bug sanitizer/80386] UBSAN: false positive - constant folding and reassosiation before instrumentation
Date: Thu, 11 May 2017 14:19:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch posted: <https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00896.html>.
>From gcc-bugs-return-563245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:19:46 2017
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Subject: [Bug libstdc++/80285] `std::make_shared` performs two separate allocations with `-fno-rtti`
Date: Thu, 11 May 2017 14:47:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-563248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:51:24 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80711] New: warn on non-const accessor member functions
Date: Thu, 11 May 2017 14:51:00 -0000
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Bug ID: 80711
Summary: warn on non-const accessor member functions
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
C++ accessor (and similar) member functions that return a value computed from
one or more private data members without modifying the owning object can and
should be declared const. Doing so not only improves the const-correctness of
code that relies on objects of the type, it also aids its analyzability. It's
easy (and not uncommon) to forget to declare accessors const. GCC could help
detect the missing const by issuing a warning on such accessors, similarly to
how it helps detect candidates for attribute const and pure.
This is an enhancement to request to add such a warning. The test case below
illustrates where it would be issued and shows the similar -Wsuggest-attribute
warning that the new one could be modeled on.
$ cat t.C && gcc -O2 -S -Wall -Wextra -Wsuggest-attribute=pure t.C
class Int
{
public:
int get () { return val; } // suggested warning: function can be declared
const
private:
int val;
};
int get_int (Int &i)
{
return i.get ();
}
t.C: In function ‘int get_int(Int&)’:
t.C:10:5: warning: function might be candidate for attribute ‘pure’
[-Wsuggest-attribute=pure]
int get_int (Int &i)
^~~~~~~
>From gcc-bugs-return-563246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:47:31 2017
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Subject: [Bug rtl-optimization/80709] [8 Regression] ICE in setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
Date: Thu, 11 May 2017 14:51:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Can't reproduce it with a recent trunk. Can you provide the output of gcc -v
please?
>From gcc-bugs-return-563247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:51:06 2017
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Subject: [Bug middle-end/80710] Stack smashing detected in correct code depending on optimization flag
Date: Thu, 11 May 2017 14:51:00 -0000
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--- Comment #1 from dr.markus.hoffmann at gmx dot de <dr.markus.hoffmann at gmx dot de> ---
This example wants to show, that the optimizer destroys compatibility to the
ABI, either with optimizing something in the calling procedure (likely) or in
the called function. The same error happens, when test2 is in a .so library and
dynamically linked to the main program at runtime. Since the main program does
not know the function prototype at compile time it has to rely on calling it in
an ABI-compatible way.
>From gcc-bugs-return-563249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:51:34 2017
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Subject: [Bug c++/80711] warn on non-const accessor member functions
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-563250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 14:59:08 2017
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Subject: [Bug middle-end/80710] Stack smashing detected in correct code depending on optimization flag
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So what happening here is you are not calling the function in ABI compatible
way at all. So this code is way undefined.
>From gcc-bugs-return-563251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 15:23:12 2017
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From: "aivchenk at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79634] ICE in expand_builtin_with_bounds, at builtins.c:7490
Date: Thu, 11 May 2017 15:47:00 -0000
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--- Comment #3 from Alexander Ivchenko <aivchenk at gmail dot com> ---
The problem here is that when CHKP is instrumenting call statement "i();" it
doesn't know that it's a builtin call. When optimizations come into play,
namely ccp pass, it becomes known that the call is to memmove and it is
actually is replaced as memmove. But we instrumented the call statement, so we
expand it like that:
if (CALL_WITH_BOUNDS_P (exp))
return expand_builtin_with_bounds (exp, target, subtarget,
tmode, ignore);
and then this assert fails:
gcc_assert (fcode > BEGIN_CHKP_BUILTINS
&& fcode < END_CHKP_BUILTINS);
Here is untested fix to check whether we substitute builtin and, if the builtin
is of the instrumentable type, make the call to instrumented builtin:
diff --git a/gcc/tree-ssa-propagate.c b/gcc/tree-ssa-propagate.c
index 0693802..9e9c4a3 100644
--- a/gcc/tree-ssa-propagate.c
+++ b/gcc/tree-ssa-propagate.c
@@ -38,6 +38,8 @@
#include "cfgloop.h"
#include "tree-cfgcleanup.h"
#include "cfganal.h"
+#include "cgraph.h"
+#include "ipa-chkp.h"
/* This file implements a generic value propagation engine based on
the same propagation used by the SSA-CCP algorithm [1].
@@ -1072,6 +1074,13 @@ substitute_and_fold_dom_walker::before_dom_children
(basic_block bb)
fold_stmt (&i, follow_single_use_edges);
stmt = gsi_stmt (i);
gimple_set_modified (stmt, true);
+ if (flag_check_pointer_bounds &&
+ gimple_code (stmt) == GIMPLE_CALL)
+ {
+ tree fndecl = gimple_call_fndecl (stmt);
+ fndecl = chkp_maybe_clone_builtin_fndecl (fndecl);
+ gimple_call_set_fndecl (stmt, fndecl);
+ }
}
/* Some statements may be simplified using propagator
>From gcc-bugs-return-563252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 15:47:55 2017
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Subject: [Bug c++/80682] __is_trivially_constructible(void, int) returns true.
Date: Thu, 11 May 2017 15:53:00 -0000
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--- Comment #5 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
This patch doesn't fully provide the means for a library implementation to just
call the intrinsic from the library trait. I have
a patch that does, which I'm testing.
>From gcc-bugs-return-563253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 15:53:08 2017
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Subject: [Bug c++/80711] warn on non-const accessor member functions
Date: Thu, 11 May 2017 16:21:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-11
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Good idea.
>From gcc-bugs-return-563254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 16:21:34 2017
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From: "mmokrejs at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/57952] AVX/AVX2 no ymm registers used in a trivial reduction
Date: Thu, 11 May 2017 16:43:00 -0000
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mmokrejs at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mmokrejs at gmail dot com
--- Comment #2 from mmokrejs at gmail dot com ---
I see a similar problem with gcc-4.9.6 unable to use 256-bit YMM registers. It
only uses 128-bit XMM registers from SSE instructions.
Try https://people.eecs.berkeley.edu/~samw/research/code/stream/stream.c
$ gcc -march=native -o stream stream.c
$ objdump -d stream | grep ymm
$
icc does the job properly:
$ icc -qopenmp -O3 -xhost stream.c
$ objdump -d a.out | grep ymm
401323: c5 fd 10 00 vmovupd (%rax),%ymm0
40132d: c5 fd 10 48 20 vmovupd 0x20(%rax),%ymm1
401332: c5 7d 10 40 40 vmovupd 0x40(%rax),%ymm8
401337: c5 7d 10 48 60 vmovupd 0x60(%rax),%ymm9
40133c: c5 7d 10 1d 3c 65 00 vmovupd 0x653c(%rip),%ymm11 #
407880 <_IO_stdin_used+0x340>
401344: c5 fd 5c 50 f8 vsubpd -0x8(%rax),%ymm0,%ymm2
401349: c5 f5 5c 58 18 vsubpd 0x18(%rax),%ymm1,%ymm3
40134e: c5 3d 5c 50 38 vsubpd 0x38(%rax),%ymm8,%ymm10
401353: c5 35 5c 60 58 vsubpd 0x58(%rax),%ymm9,%ymm12
401358: c5 a5 59 e2 vmulpd %ymm2,%ymm11,%ymm4
401361: c5 a5 59 f3 vmulpd %ymm3,%ymm11,%ymm6
401365: c4 41 25 59 ea vmulpd %ymm10,%ymm11,%ymm13
40136a: c4 41 25 59 fc vmulpd %ymm12,%ymm11,%ymm15
40136f: c5 fd e6 ec vcvttpd2dq %ymm4,%xmm5
401373: c5 fd e6 fe vcvttpd2dq %ymm6,%xmm7
401377: c4 41 7d e6 f5 vcvttpd2dq %ymm13,%xmm14
40137c: c5 f5 ef c9 vpxor %ymm1,%ymm1,%ymm1
401380: c4 41 7d e6 ef vcvttpd2dq %ymm15,%xmm13
401385: c4 e2 7d 58 e2 vpbroadcastd %xmm2,%ymm4
40139c: c4 e3 55 38 c7 01 vinserti128 $0x1,%xmm7,%ymm5,%ymm0
4013a2: c4 e2 7d 3d d9 vpmaxsd %ymm1,%ymm0,%ymm3
4013a7: c4 e2 65 39 f4 vpminsd %ymm4,%ymm3,%ymm6
4013ac: c4 43 0d 38 fd 01 vinserti128 $0x1,%xmm13,%ymm14,%ymm15
4013b2: c4 e2 05 3d e9 vpmaxsd %ymm1,%ymm15,%ymm5
4013b7: c4 e2 55 39 fe vpminsd %ymm6,%ymm5,%ymm7
4013bc: c4 c3 7d 39 f8 01 vextracti128 $0x1,%ymm7,%xmm8
401caa: c5 fd 57 c0 vxorpd %ymm0,%ymm0,%ymm0
401cc8: c5 fd 10 16 vmovupd (%rsi),%ymm2
401cd0: c5 fd 10 5e 20 vmovupd 0x20(%rsi),%ymm3
401cd5: c5 fd 10 66 40 vmovupd 0x40(%rsi),%ymm4
401cda: c5 fd 10 76 60 vmovupd 0x60(%rsi),%ymm6
401ce7: c4 e2 ed b8 0f vfmadd231pd (%rdi),%ymm2,%ymm1
401cec: c4 e2 e5 b8 47 20 vfmadd231pd 0x20(%rdi),%ymm3,%ymm0
401cf2: c5 dd 59 6f 40 vmulpd 0x40(%rdi),%ymm4,%ymm5
401cf7: c5 cd 59 7f 60 vmulpd 0x60(%rdi),%ymm6,%ymm7
401cfc: c5 d5 58 c9 vaddpd %ymm1,%ymm5,%ymm1
401d00: c5 c5 58 c0 vaddpd %ymm0,%ymm7,%ymm0
401d0d: c5 f5 58 c0 vaddpd %ymm0,%ymm1,%ymm0
401d11: c4 e3 7d 19 c1 01 vextractf128 $0x1,%ymm0,%xmm1
401d6a: c5 fd 10 8c c3 c0 be vmovupd 0x60bec0(%rbx,%rax,8),%ymm1
401d73: c5 f5 59 94 c3 c0 60 vmulpd
0x268660c0(%rbx,%rax,8),%ymm1,%ymm2
401d7c: c5 ed 58 c0 vaddpd %ymm0,%ymm2,%ymm0
401d85: c4 e3 7d 19 c1 01 vextractf128 $0x1,%ymm0,%xmm1
401f9b: c4 e2 7d 19 44 24 10 vbroadcastsd 0x10(%rsp),%ymm0
401fa2: c5 fd 10 8c d1 c0 be vmovupd 0x60bec0(%rcx,%rdx,8),%ymm1
401fab: c4 e2 fd a8 8c d1 c0 vfmadd213pd
0x268660c0(%rcx,%rdx,8),%ymm0,%ymm1
401fb5: c5 fd 2b 8c d1 c0 02 vmovntpd %ymm1,0x4cac02c0(%rcx,%rdx,8)
40213b: c5 fd 10 84 d1 c0 60 vmovupd 0x268660c0(%rcx,%rdx,8),%ymm0
402144: c5 fd 58 8c d1 c0 be vaddpd
0x60bec0(%rcx,%rdx,8),%ymm0,%ymm1
40214d: c5 fd 2b 8c d1 c0 02 vmovntpd %ymm1,0x4cac02c0(%rcx,%rdx,8)
4022dd: c4 e2 7d 19 44 24 10 vbroadcastsd 0x10(%rsp),%ymm0
4022e4: c5 fd 2b 84 d1 c0 02 vmovntpd %ymm0,0x4cac02c0(%rcx,%rdx,8)
4025c2: c5 fd 10 05 76 52 00 vmovupd 0x5276(%rip),%ymm0 #
407840 <_IO_stdin_used+0x300>
4025de: c5 fd 59 0e vmulpd (%rsi),%ymm0,%ymm1
4025e2: c5 fd 11 0e vmovupd %ymm1,(%rsi)
402759: c5 fd 10 15 ff 50 00 vmovupd 0x50ff(%rip),%ymm2 #
407860 <_IO_stdin_used+0x320>
402761: c5 fd 10 0d d7 50 00 vmovupd 0x50d7(%rip),%ymm1 #
407840 <_IO_stdin_used+0x300>
402769: c5 fd 57 c0 vxorpd %ymm0,%ymm0,%ymm0
40276d: c5 fd 2b 94 f8 c0 60 vmovntpd %ymm2,0x268660c0(%rax,%rdi,8)
402776: c5 fd 2b 8c f8 c0 be vmovntpd %ymm1,0x60bec0(%rax,%rdi,8)
40277f: c5 fd 2b 84 f8 c0 02 vmovntpd %ymm0,0x4cac02c0(%rax,%rdi,8)
4030b0: c5 fd 10 84 c8 c0 60 vmovupd 0x268660c0(%rax,%rcx,8),%ymm0
4030b9: c5 fd 2b 84 c8 c0 02 vmovntpd %ymm0,0x4cac02c0(%rax,%rcx,8)
4032f0: c5 fd 10 44 24 08 vmovupd 0x8(%rsp),%ymm0
4032fb: c5 fd 10 4c 24 28 vmovupd 0x28(%rsp),%ymm1
403301: c5 7d 10 44 24 48 vmovupd 0x48(%rsp),%ymm8
403307: c5 7d 10 4c 24 68 vmovupd 0x68(%rsp),%ymm9
40330d: c5 7d 10 1d 6b 45 00 vmovupd 0x456b(%rip),%ymm11 #
407880 <_IO_stdin_used+0x340>
403315: c5 fd 5c 14 24 vsubpd (%rsp),%ymm0,%ymm2
40331a: c5 f5 5c 5c 24 20 vsubpd 0x20(%rsp),%ymm1,%ymm3
403320: c5 3d 5c 54 24 40 vsubpd 0x40(%rsp),%ymm8,%ymm10
403326: c5 35 5c 64 24 60 vsubpd 0x60(%rsp),%ymm9,%ymm12
40332c: c5 a5 59 e2 vmulpd %ymm2,%ymm11,%ymm4
403334: c5 a5 59 f3 vmulpd %ymm3,%ymm11,%ymm6
403338: c4 41 25 59 ea vmulpd %ymm10,%ymm11,%ymm13
40333d: c4 41 25 59 fc vmulpd %ymm12,%ymm11,%ymm15
403342: c5 fd e6 ec vcvttpd2dq %ymm4,%xmm5
403346: c5 fd e6 fe vcvttpd2dq %ymm6,%xmm7
40334a: c4 41 7d e6 f5 vcvttpd2dq %ymm13,%xmm14
40334f: c5 f5 ef c9 vpxor %ymm1,%ymm1,%ymm1
403353: c4 41 7d e6 ef vcvttpd2dq %ymm15,%xmm13
403358: c4 e2 7d 58 e2 vpbroadcastd %xmm2,%ymm4
403368: c4 e3 55 38 c7 01 vinserti128 $0x1,%xmm7,%ymm5,%ymm0
40336e: c4 e2 7d 3d d9 vpmaxsd %ymm1,%ymm0,%ymm3
403373: c4 e2 65 39 f4 vpminsd %ymm4,%ymm3,%ymm6
403378: c4 43 0d 38 fd 01 vinserti128 $0x1,%xmm13,%ymm14,%ymm15
40337e: c4 e2 05 3d e9 vpmaxsd %ymm1,%ymm15,%ymm5
403383: c4 e2 55 39 fe vpminsd %ymm6,%ymm5,%ymm7
403388: c4 c3 7d 39 f8 01 vextracti128 $0x1,%ymm7,%xmm8
403694: c4 c1 7d 10 84 c0 c0 vmovupd 0x268660c0(%r8,%rax,8),%ymm0
40369e: c4 c1 7d 2b 84 c0 c0 vmovntpd %ymm0,0x4cac02c0(%r8,%rax,8)
4038ba: c5 fd 10 84 d1 c0 60 vmovupd 0x268660c0(%rcx,%rdx,8),%ymm0
4038c3: c5 fd 58 8c d1 c0 be vaddpd
0x60bec0(%rcx,%rdx,8),%ymm0,%ymm1
4038cc: c5 fd 2b 8c d1 c0 02 vmovntpd %ymm1,0x4cac02c0(%rcx,%rdx,8)
403b4a: c4 e2 7d 19 c1 vbroadcastsd %xmm1,%ymm0
403b4f: c5 fd 10 94 d1 c0 be vmovupd 0x60bec0(%rcx,%rdx,8),%ymm2
403b58: c4 e2 fd a8 94 d1 c0 vfmadd213pd
0x268660c0(%rcx,%rdx,8),%ymm0,%ymm2
403b62: c5 fd 2b 94 d1 c0 02 vmovntpd %ymm2,0x4cac02c0(%rcx,%rdx,8)
403e2e: c5 fd 57 c0 vxorpd %ymm0,%ymm0,%ymm0
403e40: c5 fd 10 14 dd c0 be vmovupd 0x60bec0(,%rbx,8),%ymm2
403e4d: c5 fd 10 1c dd e0 be vmovupd 0x60bee0(,%rbx,8),%ymm3
403e56: c5 fd 10 24 dd 00 bf vmovupd 0x60bf00(,%rbx,8),%ymm4
403e5f: c5 fd 10 34 dd 20 bf vmovupd 0x60bf20(,%rbx,8),%ymm6
403e68: c4 e2 ed b8 0c dd c0 vfmadd231pd
0x268660c0(,%rbx,8),%ymm2,%ymm1
403e72: c4 e2 e5 b8 04 dd e0 vfmadd231pd
0x268660e0(,%rbx,8),%ymm3,%ymm0
403e7c: c5 dd 59 2c dd 00 61 vmulpd 0x26866100(,%rbx,8),%ymm4,%ymm5
403e85: c5 cd 59 3c dd 20 61 vmulpd 0x26866120(,%rbx,8),%ymm6,%ymm7
403e8e: c5 d5 58 c9 vaddpd %ymm1,%ymm5,%ymm1
403e92: c5 c5 58 c0 vaddpd %ymm0,%ymm7,%ymm0
403e9f: c5 f5 58 c0 vaddpd %ymm0,%ymm1,%ymm0
403ea3: c4 e3 7d 19 c1 01 vextractf128 $0x1,%ymm0,%xmm1
403efb: c4 c1 7d 10 8c c1 c0 vmovupd 0x60bec0(%r9,%rax,8),%ymm1
403f05: c4 c1 75 59 94 c1 c0 vmulpd
0x268660c0(%r9,%rax,8),%ymm1,%ymm2
403f0f: c5 ed 58 c0 vaddpd %ymm0,%ymm2,%ymm0
403f18: c4 e3 7d 19 c1 01 vextractf128 $0x1,%ymm0,%xmm1
404216: c4 e2 7d 19 c1 vbroadcastsd %xmm1,%ymm0
40421b: c5 fd 2b 84 d1 c0 02 vmovntpd %ymm0,0x4cac02c0(%rcx,%rdx,8)
404690: c5 fe 6f 0e vmovdqu (%rsi),%ymm1
404694: c5 fe 6f 56 20 vmovdqu 0x20(%rsi),%ymm2
404699: c5 fe 6f 5e 40 vmovdqu 0x40(%rsi),%ymm3
40469e: c5 fe 6f 66 60 vmovdqu 0x60(%rsi),%ymm4
4046a3: c5 fe 6f ae 80 00 00 vmovdqu 0x80(%rsi),%ymm5
4046ab: c5 fe 6f b6 a0 00 00 vmovdqu 0xa0(%rsi),%ymm6
4046b3: c5 fe 6f be c0 00 00 vmovdqu 0xc0(%rsi),%ymm7
4046bb: c5 7e 6f 86 e0 00 00 vmovdqu 0xe0(%rsi),%ymm8
4046c3: c5 fd 7f 0f vmovdqa %ymm1,(%rdi)
4046c7: c5 fd 7f 57 20 vmovdqa %ymm2,0x20(%rdi)
4046cc: c5 fd 7f 5f 40 vmovdqa %ymm3,0x40(%rdi)
4046d1: c5 fd 7f 67 60 vmovdqa %ymm4,0x60(%rdi)
4046d6: c5 fd 7f af 80 00 00 vmovdqa %ymm5,0x80(%rdi)
4046de: c5 fd 7f b7 a0 00 00 vmovdqa %ymm6,0xa0(%rdi)
4046e6: c5 fd 7f bf c0 00 00 vmovdqa %ymm7,0xc0(%rdi)
4046ee: c5 7d 7f 87 e0 00 00 vmovdqa %ymm8,0xe0(%rdi)
40475c: c5 fe 6f 0e vmovdqu (%rsi),%ymm1
404760: c5 fe 6f 56 20 vmovdqu 0x20(%rsi),%ymm2
404765: c5 fe 6f 5e 40 vmovdqu 0x40(%rsi),%ymm3
40476a: c5 fe 6f 66 60 vmovdqu 0x60(%rsi),%ymm4
40476f: c5 fe 6f ae 80 00 00 vmovdqu 0x80(%rsi),%ymm5
404777: c5 fe 6f b6 a0 00 00 vmovdqu 0xa0(%rsi),%ymm6
40477f: c5 fe 6f be c0 00 00 vmovdqu 0xc0(%rsi),%ymm7
404787: c5 7e 6f 86 e0 00 00 vmovdqu 0xe0(%rsi),%ymm8
404796: c5 fd e7 0f vmovntdq %ymm1,(%rdi)
40479a: c5 fd e7 57 20 vmovntdq %ymm2,0x20(%rdi)
40479f: c5 fd e7 5f 40 vmovntdq %ymm3,0x40(%rdi)
4047a4: c5 fd e7 67 60 vmovntdq %ymm4,0x60(%rdi)
4047a9: c5 fd e7 af 80 00 00 vmovntdq %ymm5,0x80(%rdi)
4047b1: c5 fd e7 b7 a0 00 00 vmovntdq %ymm6,0xa0(%rdi)
4047b9: c5 fd e7 bf c0 00 00 vmovntdq %ymm7,0xc0(%rdi)
4047c1: c5 7d e7 87 e0 00 00 vmovntdq %ymm8,0xe0(%rdi)
4048f0: c5 fc 10 86 20 ff ff vmovups -0xe0(%rsi),%ymm0
4048f8: c5 fc 29 87 20 ff ff vmovaps %ymm0,-0xe0(%rdi)
404900: c5 fc 10 86 40 ff ff vmovups -0xc0(%rsi),%ymm0
404908: c5 fc 29 87 40 ff ff vmovaps %ymm0,-0xc0(%rdi)
404910: c5 fc 10 86 60 ff ff vmovups -0xa0(%rsi),%ymm0
404918: c5 fc 29 87 60 ff ff vmovaps %ymm0,-0xa0(%rdi)
404920: c5 fc 10 46 80 vmovups -0x80(%rsi),%ymm0
404925: c5 fc 29 47 80 vmovaps %ymm0,-0x80(%rdi)
40492a: c5 fc 10 46 a0 vmovups -0x60(%rsi),%ymm0
40492f: c5 fc 29 47 a0 vmovaps %ymm0,-0x60(%rdi)
404934: c5 fc 10 46 c0 vmovups -0x40(%rsi),%ymm0
404939: c5 fc 29 47 c0 vmovaps %ymm0,-0x40(%rdi)
40493e: c5 fc 10 46 e0 vmovups -0x20(%rsi),%ymm0
404943: c5 fc 29 47 e0 vmovaps %ymm0,-0x20(%rdi)
404a40: c5 fc 10 06 vmovups (%rsi),%ymm0
404a44: c5 fc 11 07 vmovups %ymm0,(%rdi)
404a48: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404a4e: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404a60: c5 fc 10 06 vmovups (%rsi),%ymm0
404a64: c5 fc 11 07 vmovups %ymm0,(%rdi)
404a68: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404a6d: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404a72: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404a78: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404a90: c5 fc 10 06 vmovups (%rsi),%ymm0
404a94: c5 fc 11 07 vmovups %ymm0,(%rdi)
404a98: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404a9d: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404aa2: c5 fc 10 46 40 vmovups 0x40(%rsi),%ymm0
404aa7: c5 fc 11 47 40 vmovups %ymm0,0x40(%rdi)
404aac: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404ab2: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404ac0: c5 fc 10 06 vmovups (%rsi),%ymm0
404ac4: c5 fc 11 07 vmovups %ymm0,(%rdi)
404ac8: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404acd: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404ad2: c5 fc 10 46 40 vmovups 0x40(%rsi),%ymm0
404ad7: c5 fc 11 47 40 vmovups %ymm0,0x40(%rdi)
404adc: c5 fc 10 46 60 vmovups 0x60(%rsi),%ymm0
404ae1: c5 fc 11 47 60 vmovups %ymm0,0x60(%rdi)
404ae6: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404aec: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404b00: c5 fc 10 06 vmovups (%rsi),%ymm0
404b04: c5 fc 11 07 vmovups %ymm0,(%rdi)
404b08: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404b0d: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404b12: c5 fc 10 46 40 vmovups 0x40(%rsi),%ymm0
404b17: c5 fc 11 47 40 vmovups %ymm0,0x40(%rdi)
404b1c: c5 fc 10 46 60 vmovups 0x60(%rsi),%ymm0
404b21: c5 fc 11 47 60 vmovups %ymm0,0x60(%rdi)
404b26: c5 fc 10 86 80 00 00 vmovups 0x80(%rsi),%ymm0
404b2e: c5 fc 11 87 80 00 00 vmovups %ymm0,0x80(%rdi)
404b36: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404b3c: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404b50: c5 fc 10 06 vmovups (%rsi),%ymm0
404b54: c5 fc 11 07 vmovups %ymm0,(%rdi)
404b58: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404b5d: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404b62: c5 fc 10 46 40 vmovups 0x40(%rsi),%ymm0
404b67: c5 fc 11 47 40 vmovups %ymm0,0x40(%rdi)
404b6c: c5 fc 10 46 60 vmovups 0x60(%rsi),%ymm0
404b71: c5 fc 11 47 60 vmovups %ymm0,0x60(%rdi)
404b76: c5 fc 10 86 80 00 00 vmovups 0x80(%rsi),%ymm0
404b7e: c5 fc 11 87 80 00 00 vmovups %ymm0,0x80(%rdi)
404b86: c5 fc 10 86 a0 00 00 vmovups 0xa0(%rsi),%ymm0
404b8e: c5 fc 11 87 a0 00 00 vmovups %ymm0,0xa0(%rdi)
404b96: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404b9c: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404bb0: c5 fc 10 06 vmovups (%rsi),%ymm0
404bb4: c5 fc 11 07 vmovups %ymm0,(%rdi)
404bb8: c5 fc 10 46 20 vmovups 0x20(%rsi),%ymm0
404bbd: c5 fc 11 47 20 vmovups %ymm0,0x20(%rdi)
404bc2: c5 fc 10 46 40 vmovups 0x40(%rsi),%ymm0
404bc7: c5 fc 11 47 40 vmovups %ymm0,0x40(%rdi)
404bcc: c5 fc 10 46 60 vmovups 0x60(%rsi),%ymm0
404bd1: c5 fc 11 47 60 vmovups %ymm0,0x60(%rdi)
404bd6: c5 fc 10 86 80 00 00 vmovups 0x80(%rsi),%ymm0
404bde: c5 fc 11 87 80 00 00 vmovups %ymm0,0x80(%rdi)
404be6: c5 fc 10 86 a0 00 00 vmovups 0xa0(%rsi),%ymm0
404bee: c5 fc 11 87 a0 00 00 vmovups %ymm0,0xa0(%rdi)
404bf6: c5 fc 10 86 c0 00 00 vmovups 0xc0(%rsi),%ymm0
404bfe: c5 fc 11 87 c0 00 00 vmovups %ymm0,0xc0(%rdi)
404c06: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404c0c: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
404c20: c5 fc 10 84 0e 00 ff vmovups -0x100(%rsi,%rcx,1),%ymm0
404c29: c5 fc 11 84 0f 00 ff vmovups %ymm0,-0x100(%rdi,%rcx,1)
404c32: c5 fc 10 84 0e 20 ff vmovups -0xe0(%rsi,%rcx,1),%ymm0
404c3b: c5 fc 11 84 0f 20 ff vmovups %ymm0,-0xe0(%rdi,%rcx,1)
404c44: c5 fc 10 84 0e 40 ff vmovups -0xc0(%rsi,%rcx,1),%ymm0
404c4d: c5 fc 11 84 0f 40 ff vmovups %ymm0,-0xc0(%rdi,%rcx,1)
404c56: c5 fc 10 84 0e 60 ff vmovups -0xa0(%rsi,%rcx,1),%ymm0
404c5f: c5 fc 11 84 0f 60 ff vmovups %ymm0,-0xa0(%rdi,%rcx,1)
404c68: c5 fc 10 44 0e 80 vmovups -0x80(%rsi,%rcx,1),%ymm0
404c6e: c5 fc 11 44 0f 80 vmovups %ymm0,-0x80(%rdi,%rcx,1)
404c74: c5 fc 10 44 0e a0 vmovups -0x60(%rsi,%rcx,1),%ymm0
404c7a: c5 fc 11 44 0f a0 vmovups %ymm0,-0x60(%rdi,%rcx,1)
404c80: c5 fc 10 44 0e c0 vmovups -0x40(%rsi,%rcx,1),%ymm0
404c86: c5 fc 11 44 0f c0 vmovups %ymm0,-0x40(%rdi,%rcx,1)
404c8c: c5 fc 10 44 0e e0 vmovups -0x20(%rsi,%rcx,1),%ymm0
404c92: c5 fc 11 44 0f e0 vmovups %ymm0,-0x20(%rdi,%rcx,1)
$
>From gcc-bugs-return-563256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 17:04:09 2017
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From: "tromey at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80712] New: mention the name of the attribute being ignored
Date: Thu, 11 May 2017 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80712
Bug ID: 80712
Summary: mention the name of the attribute being ignored
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tromey at gcc dot gnu.org
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I saw an error when building firefox with gcc 6.3.1 (fedora 25 system gcc):
/home/tromey/firefox-git/gecko/js/src/frontend/EitherParser.h:253:13: error:
ignoring attributes applied to ‘__va_list_tag’ after definition
[-Werror=attributes]
You can see more info here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1363116
I don't know what attribute might be applied here. It would be handy if
gcc mentioned which attribute it was ignoring. (FWIW I am not sure
but I suspect this error might be a gcc bug.)
>From gcc-bugs-return-563255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 16:43:15 2017
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From: "mmokrejs at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/57952] AVX/AVX2 no ymm registers used in a trivial reduction
Date: Thu, 11 May 2017 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57952
--- Comment #3 from mmokrejs at gmail dot com ---
Weird, why g++ can do the task although probably less efficiently than icc?
$ g++ -O3 -march=core-avx-i -mtune=core-avx-i -mavx2 stream.c ; objdump -d
a.out | grep ymm
stream.c:106:48: warning: deprecated conversion from string constant to 'char*'
[-Wwrite-strings]
"Add: ", "Triad: ", "Dot: "};
^
stream.c:106:48: warning: deprecated conversion from string constant to 'char*'
[-Wwrite-strings]
stream.c:106:48: warning: deprecated conversion from string constant to 'char*'
[-Wwrite-strings]
stream.c:106:48: warning: deprecated conversion from string constant to 'char*'
[-Wwrite-strings]
stream.c:106:48: warning: deprecated conversion from string constant to 'char*'
[-Wwrite-strings]
4006ac: c5 fd 28 0d 2c 11 00 vmovapd 0x112c(%rip),%ymm1 #
4017e0 <_ZL5label+0xa0>
4006b4: c5 fd 28 05 44 11 00 vmovapd 0x1144(%rip),%ymm0 #
401800 <_ZL5label+0xc0>
4006c0: c5 fd 29 88 80 61 ab vmovapd %ymm1,0x4cab6180(%rax)
4006cc: c5 fd 29 80 60 c1 85 vmovapd %ymm0,0x2685c160(%rax)
400738: c5 fd 28 01 vmovapd (%rcx),%ymm0
400740: c5 fd 58 c0 vaddpd %ymm0,%ymm0,%ymm0
400744: c5 fd 29 41 e0 vmovapd %ymm0,-0x20(%rcx)
400803: c5 fd 28 15 15 10 00 vmovapd 0x1015(%rip),%ymm2 #
401820 <_ZL5label+0xe0>
400817: c5 fd 29 95 d0 fd ff vmovapd %ymm2,-0x230(%rbp)
4008d0: c5 fd 28 95 d0 fd ff vmovapd -0x230(%rbp),%ymm2
400908: c5 fd 29 10 vmovapd %ymm2,(%rax)
40091c: c5 fd 29 95 d0 fd ff vmovapd %ymm2,-0x230(%rbp)
40098c: c5 fd 28 95 d0 fd ff vmovapd -0x230(%rbp),%ymm2
4009b8: c5 fd 28 80 80 61 ab vmovapd 0x4cab6180(%rax),%ymm0
4009c4: c5 fd 58 80 60 c1 85 vaddpd 0x2685c160(%rax),%ymm0,%ymm0
4009cc: c5 fd 29 80 60 21 60 vmovapd %ymm0,0x602160(%rax)
4009e3: c5 fd 29 95 d0 fd ff vmovapd %ymm2,-0x230(%rbp)
400a56: c5 fd 28 95 d0 fd ff vmovapd -0x230(%rbp),%ymm2
400a80: c5 ed 59 80 80 c1 85 vmulpd 0x2685c180(%rax),%ymm2,%ymm0
400a88: c5 fd 58 80 80 61 ab vaddpd 0x4cab6180(%rax),%ymm0,%ymm0
400a94: c5 fd 29 80 60 21 60 vmovapd %ymm0,0x602160(%rax)
400aab: c5 fd 29 95 d0 fd ff vmovapd %ymm2,-0x230(%rbp)
400b1e: c5 fd 28 95 d0 fd ff vmovapd -0x230(%rbp),%ymm2
400b77: c5 fd 29 95 d0 fd ff vmovapd %ymm2,-0x230(%rbp)
400bab: c5 fd 28 95 d0 fd ff vmovapd -0x230(%rbp),%ymm2
401006: c4 e3 6d 18 95 28 ff vinsertf128
$0x1,-0xd8(%rbp),%ymm2,%ymm2
401018: c4 e3 7d 18 85 48 ff vinsertf128
$0x1,-0xb8(%rbp),%ymm0,%ymm0
401022: c5 ed 5c 95 10 ff ff vsubpd -0xf0(%rbp),%ymm2,%ymm2
40102a: c5 fd 5c 85 30 ff ff vsubpd -0xd0(%rbp),%ymm0,%ymm0
401032: c5 fd 28 25 66 07 00 vmovapd 0x766(%rip),%ymm4 #
4017a0 <_ZL5label+0x60>
401044: c5 ed 59 d4 vmulpd %ymm4,%ymm2,%ymm2
401048: c5 fd 59 c4 vmulpd %ymm4,%ymm0,%ymm0
40104c: c5 fd e6 d2 vcvttpd2dq %ymm2,%xmm2
401058: c5 fd e6 c0 vcvttpd2dq %ymm0,%xmm0
40105c: c4 e3 6d 38 d0 01 vinserti128 $0x1,%xmm0,%ymm2,%ymm2
401062: c4 e2 6d 3d d3 vpmaxsd %ymm3,%ymm2,%ymm2
401067: c4 e2 6d 39 15 50 07 vpminsd 0x750(%rip),%ymm2,%ymm2
# 4017c0 <_ZL5label+0x80>
401096: c4 e3 75 18 8d 68 ff vinsertf128
$0x1,-0x98(%rbp),%ymm1,%ymm1
4010a4: c5 f5 5c 8d 50 ff ff vsubpd -0xb0(%rbp),%ymm1,%ymm1
4010b7: c5 f5 59 cc vmulpd %ymm4,%ymm1,%ymm1
4010bb: c5 fd e6 c9 vcvttpd2dq %ymm1,%xmm1
4010d3: c4 e3 7d 18 45 88 01 vinsertf128
$0x1,-0x78(%rbp),%ymm0,%ymm0
4010da: c5 fd 5c 85 70 ff ff vsubpd -0x90(%rbp),%ymm0,%ymm0
4010e2: c5 fd 59 c4 vmulpd %ymm4,%ymm0,%ymm0
4010e6: c5 fd e6 c0 vcvttpd2dq %ymm0,%xmm0
4010ea: c4 e3 75 38 c0 01 vinserti128 $0x1,%xmm0,%ymm1,%ymm0
4010f5: c4 e2 7d 3d c3 vpmaxsd %ymm3,%ymm0,%ymm0
4010fa: c4 e2 6d 39 c0 vpminsd %ymm0,%ymm2,%ymm0
4010ff: c4 e3 7d 46 c8 01 vperm2i128 $0x1,%ymm0,%ymm0,%ymm1
401105: c4 e2 7d 39 c1 vpminsd %ymm1,%ymm0,%ymm0
40110f: c5 f5 73 d8 08 vpsrldq $0x8,%ymm0,%ymm1
401114: c4 e2 7d 39 c9 vpminsd %ymm1,%ymm0,%ymm1
401119: c5 fd 73 d9 04 vpsrldq $0x4,%ymm1,%ymm0
40111e: c4 e2 75 39 c0 vpminsd %ymm0,%ymm1,%ymm0
4011e0: c4 e2 7d 19 c0 vbroadcastsd %xmm0,%ymm0
4011f0: c5 fd 29 00 vmovapd %ymm0,(%rax)
401218: c5 fd 28 80 80 61 ab vmovapd 0x4cab6180(%rax),%ymm0
401224: c5 fd 58 80 60 c1 85 vaddpd 0x2685c160(%rax),%ymm0,%ymm0
40122c: c5 fd 29 80 60 21 60 vmovapd %ymm0,0x602160(%rax)
401240: c4 e2 7d 19 c0 vbroadcastsd %xmm0,%ymm0
401250: c5 fd 59 88 80 c1 85 vmulpd 0x2685c180(%rax),%ymm0,%ymm1
401258: c5 f5 58 88 80 61 ab vaddpd 0x4cab6180(%rax),%ymm1,%ymm1
401264: c5 fd 29 88 60 21 60 vmovapd %ymm1,0x602160(%rax)
$
>From gcc-bugs-return-563257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 17:04:38 2017
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Subject: [Bug c++/70538] ICE on a deprecated access declaration in instantiate_template_1, at cp/pt.c:17310
Date: Thu, 11 May 2017 17:11:00 -0000
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed in 7.1.0: I'm adding a testcase and closing the bug.
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Thu, 11 May 2017 17:14:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
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----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Also causes my local gcc bootstrap to fail.
I think it's the -O3 -march=native causing it.
I'll try a bootstrap with the usual -O2 instead.
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Subject: [Bug c++/70538] ICE on a deprecated access declaration in instantiate_template_1, at cp/pt.c:17310
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu May 11 17:13:42 2017
New Revision: 247917
URL: https://gcc.gnu.org/viewcvs?rev=247917&root=gcc&view=rev
Log:
2017-05-11 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70538
* g++.dg/cpp0x/pr70538.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr70538.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70538] ICE on a deprecated access declaration in instantiate_template_1, at cp/pt.c:17310
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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Subject: [Bug c++/80712] mention the name of the attribute being ignored
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-11
Ever confirmed|0 |1
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=70125
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also bug 70125 for a similar request/problem report.
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
Date: Thu, 11 May 2017 18:23:00 -0000
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--- Comment #14 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu May 11 18:12:25 2017
New Revision: 247921
URL: https://gcc.gnu.org/viewcvs?rev=247921&root=gcc&view=rev
Log:
PR target/80706
* config/i386/sync.md (UNSPEC_LDX_ATOMIC): New unspec.
(UNSPEC_STX_ATOMIC): Ditto.
(loaddi_via_sse): New insn.
(storedi_via_sse): Ditto.
(atomic_loaddi_fpu): Emit loaddi_via_sse and storedi_via_sse.
Update corresponding peephole2 patterns.
(atomic_storedi_fpu): Ditto.
testsuite/ChangeLog:
PR target/80706
* gcc.target/i386/pr80706.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80706.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sync.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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--- Comment #15 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #13)
> Created attachment 41340 [details]
> gcc8-pr80706.patch
>
> I came up with this (in addition to #c7). This removes one of the two
> useless stores in the original pr71245-1.c testcase and restores the above
> pr71245-1.c modification to what it used to look before (well, even better,
> as it reserves smaller stack).
The committed patch fixes unwanted matching by introducing specialized SSE
load/store patterns. I don't think it is worth complicating sync.md any
further, the stack slot is shared, and the patched compiler generates exactly
the same assembly as before.
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Subject: [Bug ipa/79787] ICE in remove_unreachable_nodes, at ipa.c:469
Date: Thu, 11 May 2017 18:54:00 -0000
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ienkovich at gcc dot gnu.org
--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
This code in remove_unreachable_nodes is supposed to prevent removal of fn1.
Thusly we remove node which is not considered as unreachable by
remove_unreachable_nodes.
Did you try to find out how fn1 node is removed and prevent it?
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From: "ienkovich at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79634] ICE in expand_builtin_with_bounds, at builtins.c:7490
Date: Thu, 11 May 2017 20:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79634
--- Comment #4 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
We hit function pointer propagation issues before and chkp_redirect_edge with
corresponding code in redirect_call_stmt_to_callee appeared to handle them. Why
doesn't it work in this case?
>From gcc-bugs-return-563267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:13:16 2017
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Subject: [Bug c/80713] New: recent crash in update_dep_bb
Date: Thu, 11 May 2017 20:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80713
Bug ID: 80713
Summary: recent crash in update_dep_bb
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Created attachment 41341
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41341&action=edit
C source code
Between revisions 247856 and 247911, the attached code went
wrong and crashed the compiler with flag -O2.
I'll have a go at reducing the code.
$ ../results.247856/bin/gcc -c -O2 -w bug352.c
$ ../results.247911/bin/gcc -c -O2 -w bug352.c
destDir/testFile.3785.c: In function ‘func_1’:
destDir/testFile.3785.c:239:24: internal compiler error: Segmentation fault
0xc3b34f crash_signal
../../trunk/gcc/toplev.c:337
0xe52101 update_dep_bb
../../trunk/gcc/tree-ssa-tail-merge.c:408
0xe52101 stmt_update_dep_bb
../../trunk/gcc/tree-ssa-tail-merge.c:430
0xe52101 same_succ_hash
../../trunk/gcc/tree-ssa-tail-merge.c:453
>From gcc-bugs-return-563268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:16:42 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
Date: Thu, 11 May 2017 20:17:00 -0000
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Thu May 11 20:16:02 2017
New Revision: 247928
URL: https://gcc.gnu.org/viewcvs?rev=247928&root=gcc&view=rev
Log:
[gcc]
2017-05-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/80695
* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost):
Account for direct move costs for vec_construct of integer
vectors.
[gcc/testsuite]
2017-05-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/80695
* gcc.target/powerpc/pr80695-p8.c: New file.
* gcc.target/powerpc/pr80695-p9.c: New file.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr80695-p8.c
trunk/gcc/testsuite/gcc.target/powerpc/pr80695-p9.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-563269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:17:53 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-563270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:32:35 2017
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Subject: [Bug target/80713] recent crash in update_dep_bb
Date: Thu, 11 May 2017 20:38:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced code is this:
a, b, d, e, f;
*c;
g() {
for (;;) {
if (*c) {
int h;
*c = &h;
} else
b = 0;
if (f)
*c = g;
else
for (; a; a++)
for (;;) {
if (d)
break;
c = e;
}
}
}
>From gcc-bugs-return-563271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:38:25 2017
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Subject: [Bug target/80713] recent crash in update_dep_bb
Date: Thu, 11 May 2017 20:41:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Last person to change source code file tree-ssa-tail-merge.c
was Richard Biener in revision 247882.
Richard, would you be able to offer us some advice on your recent change ?
>From gcc-bugs-return-563272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:41:28 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78659] [F03] Spurious "requires DTIO" reported against namelist statement
Date: Thu, 11 May 2017 20:48:00 -0000
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--- Comment #14 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Thu May 11 20:40:49 2017
New Revision: 247930
URL: https://gcc.gnu.org/viewcvs?rev=247930&root=gcc&view=rev
Log:
2017-05-11 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR fortran/78659
* io.c (dtio_procs_present): Add new function to check for DTIO
procedures relative to I/O statement READ or WRITE.
(gfc_resolve_dt): Add namelist checks using the new function.
* resolve.c (dtio_procs_present): Remove function and related
namelist checks. (resolve_fl_namelist): Add check specific to
Fortran 95 restriction on namelist objects.
* gfortran.dg/namelist_91.f90: New test.
* gfortran.dg/namelist_92.f90: New test.
* gfortran.dg/namelist_93.f90: New test.
* gfortran.dg/namelist_94.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/namelist_91.f90
trunk/gcc/testsuite/gfortran.dg/namelist_92.f90
trunk/gcc/testsuite/gfortran.dg/namelist_93.f90
trunk/gcc/testsuite/gfortran.dg/namelist_94.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/io.c
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-563273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:48:50 2017
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80714] New: [8 Regression] profiledbootstrap failed with LTO
Date: Thu, 11 May 2017 20:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80714
Bug ID: 80714
Summary: [8 Regression] profiledbootstrap failed with LTO
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: bergner at vnet dot ibm.com
Target Milestone: ---
On Linux/x86-64, r247844 caused profiledbootstrap failure:
./../src-trunk/gcc/genrecog.c: In function ‘print_test’:
../../src-trunk/gcc/genrecog.c:4619:1: error: extra outgoing edge 29->30
print_test (output_state *os, const rtx_test &test, bool is_param,
^
../../src-trunk/gcc/genrecog.c:4619:1: internal compiler error:
verify_flow_info failed
0x72f3c7 verify_flow_info()
../../src-trunk/gcc/cfghooks.c:260
0xfea51c checking_verify_flow_info
../../src-trunk/gcc/cfghooks.h:198
0xfea51c cleanup_tree_cfg_noloop
../../src-trunk/gcc/tree-cfgcleanup.c:837
0xfea51c cleanup_tree_cfg()
../../src-trunk/gcc/tree-cfgcleanup.c:883
0xd992fc execute_function_todo
../../src-trunk/gcc/passes.c:1921
0xd96414 do_per_function
../../src-trunk/gcc/passes.c:1652
0xd96717 execute_todo
../../src-trunk/gcc/passes.c:2022
0xd9ccec execute_one_ipa_transform_pass
../../src-trunk/gcc/passes.c:2219
0xd9ccec execute_all_ipa_transforms()
../../src-trunk/gcc/passes.c:2255
0x78d43e cgraph_node::expand()
../../src-trunk/gcc/cgraphunit.c:2035
0x790832 expand_all_functions
../../src-trunk/gcc/cgraphunit.c:2178
0x790832 symbol_table::compile()
../../src-trunk/gcc/cgraphunit.c:2535
0x656af4 lto_main()
../../src-trunk/gcc/lto/lto.c:3334
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[7]: *** [/tmp/ccH2Om7R.ltrans2.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Makefile:2794: recipe for target 'build/genrecog' failed
make[6]: *** [build/genrecog] Error 1
when gcc is configured with
--prefix=/export/gnu/import/git/gcc-regression-bootstrap/master/247851/usr
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--enable-languages=c,c++ --enable-bootstrap --with-fpmath=sse
--with-build-config=bootstrap-lto --disable-werror --disable-multilib
--disable-libcc1 --disable-libcilkrts --disable-libsanitizer
>From gcc-bugs-return-563274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 20:49:04 2017
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80715] New: NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c
Date: Thu, 11 May 2017 21:10:00 -0000
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Bug ID: 80715
Summary: NULL pointer dereferenced in find_costs_and_classes,
at ira-costs.c
Product: gcc
Version: 7.1.0
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This seems to be linked to 78650
/*NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c:1748 */
/* must be compiled with options "-O2 -flive-range-shrinkage" */
/* double checked with ira_assert and ENABLE_IRA_CHECKING */
/*/home/vitti/f95/cc/gccerr55.c: In function ‘f’:
/home/vitti/f95/cc/gccerr55.c:27:1: internal compiler error: in
find_costs_and_classes, at ira-costs.c:1748
}
^
0x863be3 find_costs_and_classes
../../gcc/gcc/ira-costs.c:1748
0x864959 ira_costs()
../../gcc/gcc/ira-costs.c:2261
0x85e356 ira_build()
../../gcc/gcc/ira-build.c:3420
0x855ccb ira
../../gcc/gcc/ira.c:5302
0x855ccb execute
../../gcc/gcc/ira.c:5613
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.
*/
//ira-costs.c:1748 ira_assert(cost_classes_ptr);/*!vz pr60268.c -O2
-flive-range-shrinkage*/
//1749 enum reg_class *cost_classes = cost_classes_ptr->classes;
void f()
{
}
>From gcc-bugs-return-563275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 21:10:07 2017
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Subject: [Bug target/79634] ICE in expand_builtin_with_bounds, at builtins.c:7490
Date: Thu, 11 May 2017 21:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79634
--- Comment #5 from Alexander Ivchenko <aivchenk at gmail dot com> ---
(In reply to Ilya Enkovich from comment #4)
> We hit function pointer propagation issues before and chkp_redirect_edge
> with corresponding code in redirect_call_stmt_to_callee appeared to handle
> them. Why doesn't it work in this case?
cgraph_edge::redirect_call_stmt_to_callee is not called at all here. I'll try
to figure out why tomorrow
>From gcc-bugs-return-563276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 21:36:34 2017
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
Date: Thu, 11 May 2017 22:13:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #3 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Jos de Kloe from comment #2)
> (In reply to Dominique d'Humieres from comment #1)
> > Why do you think this a bug in gfortran?
> >
> > The code compiles if you remove 'implicit none'. With it you have to define
> > 'keylen' before using it, as in you second test.
>
> We had the impression our code was correct since it compiles without problem
> with pgf90 and ifort and older gfortran versions. I understand that extra
> checks are added when the compiler evolves, and that the democratic argument
> is maybe not applicable here, so if you think there is a rule in the fortran
> standard that forbids this way of coding, feel free to point it out and we
> can close the bug.
Compiling the code in comment #0 with ifort gives:
% ifort -c pr80666.f90 -stand
pr80666.f90(3): warning #7346: The CHARACTER* form of a CHARACTER declaration
is an obsolescent feature in Fortran 2003.
character*(keylen), intent(in) :: key
-------------^
pr80666.f90(3): warning #8586: Implicit type is given to allow out-of-order
declaration. Non-standard extension. [KEYLEN]
character*(keylen), intent(in) :: key
-------------^
Or with Sun:
% sunf95 -c pr80666.f90 -ansi
integer, intent(in) :: keylen
^
"pr80666.f90", Line = 4, Column = 37: ANSI: Implicit typing is confirmed for
object "KEYLEN". The Fortran standard requires typing before reference with
IMPLICIT NONE.
f90comp: 5 SOURCE LINES
f90comp: 0 ERRORS, 0 WARNINGS, 0 OTHER MESSAGES, 1 ANSI
Just try to write standard conforming code if possible.
And use the appropriate compiler checking option.
>From gcc-bugs-return-563277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:13:11 2017
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From: "breakpoint at runbox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80716] New: Death by Documentation (SEGFAULT)
Date: Thu, 11 May 2017 22:17:00 -0000
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Bug ID: 80716
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This bug is odd, in that it looks like it must be a preprocessor problem, but
it seems to be the compiler itself that is crashing.
Verbatim minimal code:
#define DEATH_BY_DOCUMENTATION
class dismissed {
public:
dismissed() {
// Construct the tree used for depth-first traversal testing.
//
// The tree has this structure:
//
// 1
// /|\
// 2 7 8
// /| |\
// 3 6 9 12
// /| |\
// 4 5 10 11
}
};
No lines have trailing whitespace. Line 19 consists of a newline only and ends
the file.
Causes a segmentation fault in gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1)
(Fedora 25, 64-bit):
internal compiler error: Segmentation fault
#define DEATH_BY_DOCUMENTATION
Please submit a full bug report,
with preprocessed source if appropriate.
Flags: -O0 -g -ggdb3 -gdwarf-4 -fvar-tracking -fvar-tracking-assignments
-DGTEST_USE_OWN_TR1_TUPLE=0 -DGTEST_HAS_PTHREAD=1 -Dgtest_build_tests=ON
-DHAVE_EXPAT_CONFIG_H -std=gnu++03 -Wno-error=vla
Most extraneous material has been stripped. The #define is required, but the
symbol seems to be irrelevant. Adding newlines and/or semicolons before the
#define does not change the result.
Removing the #define avoids the segfault, and results in:
xxx.cpp:11:13: error: multi-line comment [-Werror=comment]
// /|\
^
xxx.cpp:13:13: error: multi-line comment [-Werror=comment]
// /| |\
^
xxx.cpp:15:13: error: multi-line comment [-Werror=comment]
// /| |\
This is part of a larger build, but unfortunately, that is composed of
proprietary material. So, this report may be mostly useful as additional data
for a similar bug, if anyone knows of one that exists, or may point out some
material that needs a code review.
If built as a standalone a.out with a token main(){}, all goes well. However,
the code above is verbatim from our minimal crash case in the larger build;
note that it has no #includes.
It is possible, but unlikely, that this is somehow related to cotire; if I
figure that out, I'll add it in.
Does anyone know of any rough edges related to escape sequences in comments, or
possibly trigraphs or something that seem like they might be related to this?
Thanks.
>From gcc-bugs-return-563278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:17:20 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/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
Date: Thu, 11 May 2017 22:17:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-11
Ever confirmed|0 |1
--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
I did some comparisons to older benchmarks that were run on the same machine.
On April 21, 2016 I did a benchmark run with subversion id 235167, and milc's
speed was roughly the same as GCC 6.3.
On May 12, 2016, I did a benchmark run with subversion id 236136, and milc's
speed was roughly the same as GCC 7.1.
Here is the function that seems to be causing the performance issues:
Instructions | gcc7 | gcc6 | diff | Class
============ | ==== | ==== | ==== | =====
fadd, xsaddd | 12 | 0 | -12 | DF add
fmadd, xsmadd*dp | 20 | 28 | 8 | DF multiply and add
fmsub, xsmsub*dp | 4 | 0 | -4 | DF multiply and subtract
fmul, xsmuldp | 24 | 8 | -16 | DF multiply
fnmsub, xsnmsub*dp | 0 | 12 | 12 | DF negate, multiply and subtract
fsub, xssubdp | 4 | 0 | -4 | DF subtract
ld | 5 | 0 | -5 | load doubleword offset
lfd | 48 | 53 | 5 | load DF offset
mtvsrd | 5 | 0 | -5 | move to vsr doubleword
xvadddp | 3 | 0 | -3 | V2DF add
xvmadd*dp | 5 | 7 | 2 | V2DF multiply and add
xvmuldp | 6 | 2 | -4 | V2DF multiply
xvnmsub*dp | 1 | 3 | 2 | V2DF negate, multiply and subtract
xvsubdp | 1 | 0 | -1 | V2DF subtract
If I had to guess there are two things going on that are based in PowerPC
changes in that period. The first is a rather massive patch that I put in to
add ISA 3.0 d-form (register+offset) support. It looks like it causes the
register allocator to load values in GPRs and do direct moves when it wants to
move a value to a scalar DFmode value in a traditional Altivec register (which
prior to ISA 3.0 did not have d-form support). This accounts for the LD
instead of the LFD instructions and the MTVSRD. While it is better than a
store and a load, a direct move on power8 systems is fairly slow. I ran into a
similar thing with PR 68163, and fixing it involved tuning the constraints for
the moves (SFmode in the case of 68163, DFmode here).
The second thing is Aaron Sawdey's patch for tuning the reassociation width
went in in this period. This likely affects when we can merge adds and
multiply into the PowerPC fma instructions.
2016-05-04 Aaron Sawdey <acsawdey@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_reassociation_width): Add
function for TARGET_SCHED_REASSOCIATION_WIDTH to enable
parallel reassociation for power8 and forward.
2016-05-11 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/predicates.md (quad_memory_operand): Move most of
the code into quad_address_p and call it to share code with
vsx_quad_dform_memory_operand.
(vsx_quad_dform_memory_operand): New predicate for ISA 3.0 vector
d-form support.
* config/rs6000/rs6000.opt (-mlra): Switch to being an option mask
bit instead of being a separate word. Split -mpower9-dform into
two switches, -mpower9-dform-scalar and -mpower9-dform-vector.
* config/rs6000/rs6000.c (RELOAD_REG_QUAD_OFFSET): New addr_mask
for the register class supporting 128-bit quad word memory offsets.
(mode_supports_vsx_dform_quad): Helper function to return if the
register class uses quad word memory offsets.
(rs6000_debug_addr_mask): Add support for quad word memory offsets.
(rs6000_debug_reg_global): Always print if we are using LRA or not.
(rs6000_setup_reg_addr_masks): If ISA 3.0 vector d-form
instructions are enabled, set up the appropriate addr_masks for
128-bit types.
(rs6000_init_hard_regno_mode_ok): wb constraint is now based on
-mpower9-dform-scalar, instead of -mpower9-dform.
(rs6000_option_override_internal): Split -mpower9-dform into two
switches, -mpower9-dform-scalar and -mpower9-dform-vector. The
-mpower9-dform switch sets or clears both. If we are not using
the LRA register allocator, do not enable -mpower9-dform-vector by
default. If we are using LRA, enable -mpower9-dform-vector and
-mvsx-timode if it is appropriate. Issue a warning if either
-mpower9-dform-vector or -mvsx-timode are explicitly used without
enabling LRA.
(quad_address_offset_p): New helper function to return if the
offset is legal for quad word memory instructions.
(quad_address_p): New function to determin if GPR or vector
register quad word memory addresses are legal.
(mem_operand_gpr): Validate quad word address offsets.
(reg_offset_addressing_ok_p): Add support for ISA 3.0 vector
d-form (register + offset) instructions.
(offsettable_ok_by_alignment): Likewise.
(rs6000_legitimate_offset_address_p): Likewise.
(legitimate_lo_sum_address_p): Likewise.
(rs6000_legitimize_address): Likewise.
(rs6000_legitimize_reload_address): Add more debug statements for
-mdebug=addr.
(rs6000_legitimate_address_p): Add support for ISA 3.0 vector
d-form instructions.
(rs6000_secondary_reload_memory): Add support for ISA 3.0 vector
d-form instructions. Distinguish different cases in debug
output. (rs6000_secondary_reload_inner): Add support for ISA 3.0 vector
d-form instructions.
(rs6000_preferred_reload_class): Likewise.
(rs6000_output_move_128bit): Add support for ISA 3.0 d-form
instructions. If ISA 3.0 is available, generate lxvx/stxvx instead
of the ISA 2.06 indexed memory instructions.
(rs6000_emit_prologue): If we have ISA 3.0 d-form instructions,
use them to save/restore the saved vector registers instead of
using Altivec instructions.
(rs6000_emit_epilogue): Likewise.
(rs6000_lra_p): Use TARGET_LRA instead of the old option word.
(rs6000_opt_masks): Split -mpower9-dform into
-mpower9-dform-scalar and -mpower9-dform-vector.
(rs6000_print_options_internal): Print -mno-<switch> if <switch>
was not selected.
* config/rs6000/vsx.md (p9_vecload_<mode>): Delete hack to emit
ISA 3.0 vector indexed memory instructions, and fold the code into
the normal mov<mode> patterns.
(p9_vecstore_<mode>): Likewise.
(vsx_mov<mode>): Add support for ISA 3.0 vector d-form
instructions.
(vsx_movti_64bit): Likewise.
(vsx_movti_32bit): Likewise.
* config/rs6000/constraints.md (wO constraint): New constraint for
ISA 3.0 vector d-form support.
* config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Use
-mpower9-dform-scalar instead of -mpower9-dform. Add note not to
include -mpower9-dform-vector until we switch over to LRA.
(POWERPC_MASKS): Add -mlra. Split -mpower9-dform into two.
switches, -mpower9-dform-scalar and -mpower9-dform-vector.
* config/rs6000/rs6000-protos.h (quad_address_p): Add declaration.
* doc/invoke.texi (RS/6000 and PowerPC Options): Add documentation
for -mpower9-dform and -mlra.
* doc/md.texi (wO constraint): Document wO constraint.
>From gcc-bugs-return-563279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:17:37 2017
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Subject: [Bug c++/80716] Death by Documentation (SEGFAULT)
Date: Thu, 11 May 2017 22:21:00 -0000
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--- Comment #1 from Matt Heck <breakpoint at runbox dot com> ---
Oh, I almost forgot the important part:
Substituting commas for those backslashes DOES resolve the problem, but ALL
THREE must be replaced.
Substituting \\ for \ DOES NOT resolve the problem.
Substituting \t for \ DOES resolve the problem.
Substituting "\ " for "\" DOES NOT resolve the problem.
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Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
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Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
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--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 41342
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Preprocessed C source for the mult_adj_su3_mat_vec function
To reproduce, you need to use the -O3 -ffast-math options.
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>From gcc-bugs-return-563284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:54:18 2017
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Thu, 11 May 2017 22:54:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
*** Bug 80714 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-563283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:54:18 2017
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Subject: [Bug bootstrap/80714] [8 Regression] profiledbootstrap failed with LTO
Date: Thu, 11 May 2017 22:54:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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CC| |bergner at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
This is a dup.
*** This bug has been marked as a duplicate of bug 80707 ***
>From gcc-bugs-return-563285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 22:54:40 2017
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Subject: [Bug bootstrap/80714] [8 Regression] profiledbootstrap failed with LTO
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Closing as a dup.
>From gcc-bugs-return-563286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 11 23:01:46 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/52763] Warning if compare between enum and non-enum type
Date: Thu, 11 May 2017 23:47:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Clang warns when an enum object is compared to a constant that's out of the
most restricted range of the enum's type. The warning is in -Wall. It doesn't
warn when the object is compared to a constant that doesn't correspond to any
of the type's enumerators. I can see that being useful to some (carefully
written) projects but suspect it could be quite noisy for many others.
$ cat t.C && clang++ -S -Wall -Wextra t.C
enum E { NONE = 0, ONE = 1, TWO = 2 };
bool f (E e)
{
return e == 3; // no warning here
}
bool g (E e)
{
return e == 4;
}
t.C:10:12: warning: comparison of constant 4 with expression of type 'E' is
always false [-Wtautological-constant-out-of-range-compare]
return e == 4;
~ ^ ~
1 warning generated.
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
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--- Comment #9 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu May 11 23:52:54 2017
New Revision: 247937
URL: https://gcc.gnu.org/viewcvs?rev=247937&root=gcc&view=rev
Log:
PR go/64238
* go-gcc.cc (Gcc_backend::implicit_variable_reference): Set
DECL_EXTERNAL, clear TREE_STATIC.
Modified:
trunk/gcc/go/ChangeLog
trunk/gcc/go/go-gcc.cc
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/7654] warn if an enum is being assigned a non enum value
Date: Thu, 11 May 2017 23:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=7654
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |NEW
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=78736
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'll confirm this ancient request.
Bug 78736 asks for something similar, and I'm working on enhancing the solution
there even further (to diagnose assigning constants that don't have a
corresponding enumerator in the destination type). I'll add that on the
following slightly modified test case Clang issues the warnings below:
$ cat t.C && clang -S -Wall -Wextra -Weverything -xc t.C
void f (int i)
{
enum e1 { e1a, e1b };
enum e1 e1v;
enum e2 { e2a, e2b };
enum e2 e2v;
e1v = 1; // no warning
e1v = 3; // warning
e1v = e1a; // ok
e2v = e1v; // warning
i = e1v; // ok I guess
e2v = i; // warning
}
t.C:9:9: warning: integer constant not in range of enumerated type 'enum e1'
[-Wassign-enum]
e1v = 3; // warning
^
t.C:11:9: warning: implicit conversion from enumeration type 'enum e1' to
different enumeration type 'enum e2' [-Wenum-conversion]
e2v = e1v; // warning
~ ^~~
t.C:13:9: warning: implicit conversion changes signedness: 'int' to 'enum e2'
[-Wsign-conversion]
e2v = i; // warning
~ ^
t.C:1:6: warning: no previous prototype for function 'f' [-Wmissing-prototypes]
void f (int i)
^
4 warnings
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Thu, 11 May 2017 23:54:00 -0000
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--- Comment #10 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu May 11 23:53:13 2017
New Revision: 247938
URL: https://gcc.gnu.org/viewcvs?rev=247938&root=gcc&view=rev
Log:
PR go/64238
* go-gcc.cc (Gcc_backend::implicit_variable_reference): Set
DECL_EXTERNAL, clear TREE_STATIC.
Modified:
branches/gcc-7-branch/gcc/go/ChangeLog
branches/gcc-7-branch/gcc/go/go-gcc.cc
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Fri, 12 May 2017 00:01:00 -0000
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--- Comment #11 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu May 11 23:53:29 2017
New Revision: 247939
URL: https://gcc.gnu.org/viewcvs?rev=247939&root=gcc&view=rev
Log:
PR go/64238
* go-gcc.cc (Gcc_backend::implicit_variable_reference): Set
DECL_EXTERNAL, clear TREE_STATIC.
Modified:
branches/gcc-6-branch/gcc/go/ChangeLog
branches/gcc-6-branch/gcc/go/go-gcc.cc
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Fri, 12 May 2017 00:01:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Ian Lance Taylor <ian at airs dot com> ---
Thanks, should be fixed now.
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Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
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--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 12 00:00:50 2017
New Revision: 247940
URL: https://gcc.gnu.org/viewcvs?rev=247940&root=gcc&view=rev
Log:
Attempt to fix pr 80697
Modified:
branches/ibm/meissner-work/gcc/ChangeLog.meissner
branches/ibm/meissner-work/gcc/config/rs6000/rs6000.md
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Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
Date: Fri, 12 May 2017 00:09:00 -0000
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--- Comment #7 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 12 00:05:24 2017
New Revision: 247941
URL: https://gcc.gnu.org/viewcvs?rev=247941&root=gcc&view=rev
Log:
Attempt to fix pr 80697
Modified:
branches/ibm/meissner-work/gcc/ChangeLog.meissner
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Fri, 12 May 2017 00:17:00 -0000
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--- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> ---
David and HJ, the following patch fixes the ICE Markus reported, so can you try
the following patch to see if it fixes your bootstrap issues?
Index: tree-cfg.c
===================================================================
--- tree-cfg.c (revision 247845)
+++ tree-cfg.c (working copy)
@@ -1684,6 +1684,10 @@ group_case_labels_stmt (gswitch *stmt)
|| (EDGE_COUNT (base_bb->succs) == 0
&& gimple_seq_unreachable_p (bb_seq (base_bb))))
{
+ edge e;
+ if (base_bb != default_bb
+ && (e = find_edge (gimple_bb (stmt), base_bb)) != NULL)
+ remove_edge_and_dominated_blocks (e);
gimple_switch_set_label (stmt, i, NULL_TREE);
i++;
new_size--;
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Subject: [Bug target/80697] On PowerPC, the spec 2006 benchmark milc had a 5.6% regression under GCC 7.1 compared to GCC 6.3.
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--- Comment #8 from Michael Meissner <meissner at gcc dot gnu.org> ---
I forgot to mention that I ran the MILC benchmark on a little endian power8
system, using -mcpu=power8 in addition to -O3 and -ffast-math.
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From: "theivorytower at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/80717] New: LTO wrappers segfault if run with absolute path
Date: Fri, 12 May 2017 01:36:00 -0000
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Bug ID: 80717
Summary: LTO wrappers segfault if run with absolute path
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: theivorytower at gmail dot com
Target Milestone: ---
When I run any of the LTO wrappers (gcc-ar, gcc-nm, gcc-ranlib) with absolute
path (e.g. /usr/bin/gcc-ar), the program segfaults immediately. I tried to run
some debugging, and I found the culprit is in line 197-204 of gcc-ar.c.
Basically gcc-ar was trying to find ar, and "/usr/bin/" was removed from the
list of path to search for ar in line 203 of gcc-ar.c. As a result ar cannot be
found and the program segfaults.
I'm using Arch Linux and my gcc version info is as follows:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/hao/code/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++,lto --enable-shared --enable-threads=posix
--enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--disable-libssp --enable-gnu-unique-object --enable-linker-build-id
--enable-lto --enable-plugin --enable-install-libiberty
--with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-multilib
--disable-werror --enable-checking=release
Thread model: posix
gcc version 7.1.1 20170508 (GCC)
>From gcc-bugs-return-563297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 01:36:16 2017
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Subject: [Bug fortran/80333] Namelist dtio write of array of class does not traverse the array
Date: Fri, 12 May 2017 02:44:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
This is front end issue, and I will explore
>From gcc-bugs-return-563298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 02:44:43 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80718] New: GCC generates slow code for offsettable vec_duplicate
Date: Fri, 12 May 2017 02:49:00 -0000
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Bug ID: 80718
Summary: GCC generates slow code for offsettable vec_duplicate
Product: gcc
Version: 8.0
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In looking at bug 80697, I noticed on power8, there were loads to a GPR
register and move directs to vector registers.
I tracked this down to the load with splat instruction only taking indirect or
indexed loads, while the original address is an offsettable load. So the
register allocator decides to load up a GPR and do the transfer over to the
vector register to do the vec_duplicate operation.
I.e.:
vector double foo (double *p) { return (vector double) { p[4], p[4] }; }
generates:
foo:
ld 9,32(3)
mtvsrd 34,9
xxpermdi 34,34,34,0
blr
I tested adding a combiner pattern to support offsettable loads, and it
generates:
foo:
li 9,32
lxvdsx 34,3,9
blr
>From gcc-bugs-return-563299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 02:49:21 2017
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Subject: [Bug c++/61543] static_cast<void *>(static_cast<int>(enum_value)) doesn't get an error
Date: Fri, 12 May 2017 05:38:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-12
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.8.3, 4.9.3, 5.3.0, 6.2.0,
| |7.1.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. GCC seems to treat rvalues of integer types with zero value as the
literal 0.
$ cat t.C && gcc -S -Wall t.C
const int i = 0;
void *p0 = static_cast<void *>(i);
void *p1 = static_cast<void *>(static_cast<int>(i)); // accepted
enum { e = 0 };
void *q = static_cast<void *>(static_cast<int>(e)); // accepted
y.C:3:33: error: invalid static_cast from type ‘const int’ to type ‘void*’
void *p0 = static_cast<void *>(i);
^
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Subject: [Bug fortran/79440] internal compiler error: in fold_convert_loc, at fold-const.c:2373
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Berke Durak <berke.durak at gmail dot com> changed:
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--- Comment #2 from Berke Durak <berke.durak at gmail dot com> ---
I get a similar error with 7.0.1:
% cat crash.f90
module gogol
implicit none
type plop
end type plop
contains
function create() result(this)
class(plop), allocatable :: this
allocate(this)
end function create
end module gogol
program foo
use gogol
implicit none
type(plop), allocatable :: x
x=create()
contains
end program foo
% gfortran crash.f90
crash.f90:17:0:
x=create()
internal compiler error: in fold_convert_loc, at fold-const.c:2361
0x864863 fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../src/gcc/fold-const.c:2361
0x6a5d7a gfc_allocate_using_malloc(stmtblock_t*, tree_node*, tree_node*, tre
e_node*)
../../src/gcc/fortran/trans.c:662
0x6de110 trans_class_assignment
../../src/gcc/fortran/trans-expr.c:9693
0x6de110 gfc_trans_assignment_1
../../src/gcc/fortran/trans-expr.c:10031
0x6a38ff trans_code
../../src/gcc/fortran/trans.c:1817
0x6c8907 gfc_generate_function_code(gfc_namespace*)
../../src/gcc/fortran/trans-decl.c:6296
0x65dac6 translate_all_program_units
../../src/gcc/fortran/parse.c:6051
0x65dac6 gfc_parse_file()
../../src/gcc/fortran/parse.c:6251
0x6a043f gfc_be_parse_file
../../src/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 <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
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Subject: [Bug preprocessor/80716] Death by Documentation (SEGFAULT)
Date: Fri, 12 May 2017 05:53:00 -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> ---
Can't reproduce with gcc version 6.3.1 20161221 (Red Hat 6.3.1-1) (GCC) nor
current trunk. Perhaps the flags you've listed are incomplete? There is no
-Wall nor -Wcomment nor -Wall -Werror nor -Werror=comment, so it certainly
doesn't warn with the flags you've mentioned.
It might be better if you attach the testcase, so that tabs vs. spaces are
preserved.
>From gcc-bugs-return-563302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 05:55:21 2017
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Subject: [Bug preprocessor/80716] Death by Documentation (SEGFAULT)
Date: Fri, 12 May 2017 06:01:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Of course, if you want to have \s at the end of line in comments, you just
should use /* ... */ style comments that can span multiple lines.
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Subject: [Bug target/57952] AVX/AVX2 no ymm registers used in a trivial reduction
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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> ---
The reason why #c1 (as well as #c0) is only vectorized using vector length of 8
rather than 4 is that the loop iterator is cast to float and therefore needed
inside of the loop in vector registers:
pr57952.C:21:20: note: op not supported by target.
pr57952.C:21:20: note: not vectorized: relevant stmt not supported: i_16 = i_41
+ 1;
pr57952.C:21:20: note: bad operation or unsupported loop bound.
and AVX doesn't support V8SImode addition.
Now, perhaps we could have an optimization that in that case if all the
iterators can be provably exactly represented in the floating point value we
could try to do what the programmer should have done, i.e. add a float iterator
that is set to 1.0f and incremented in each iteration and used instead of
float(i). But it won't work in this case, because you need 24 bits for the
iterator and float only has 23 bit mantissa.
for (int k=0; k!=100; ++k) {
float c = 1.f/10000000.f;
float fi = 1.f;
for (int i=1; i<10000001; ++i) { s+= polyHorner((fi+float(k))*c); fi +=
1.f; }
}
is vectorized with -Ofast -mavx just fine vectorization factor of 8.
As for #c2/#c3, GCC 4.9 is not supported anymore and the dumps are too large to
find out what exactly you mean by efficient and not efficient, both the ICC and
GCC generated assemblies use both %ymm and %xmm registers depending on what
exactly the need.
>From gcc-bugs-return-563304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:16:09 2017
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From: "joriswu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/80719] New: gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
Date: Fri, 12 May 2017 06:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80719
Bug ID: 80719
Summary: gcc build fails on libiberty conflicting types:
CP_STATIC_IF_GLIBCPP_V3
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: joriswu at gmail dot com
Target Milestone: ---
When building gcc release 7.1.0 according to https://gcc.gnu.org/install, a
type conflict in building libiberty causes an error.
When building without binutils added to the source tree, buid stops at a
missing libiberty.aq
When building binutils libiberty in a separate dir and copying linbiberty.a, an
error about incorrect relacation type shows.
When unpacking binutils 2.28 into the gcc source dir, the type conflict shows :
if [ x"-fpic" != x ]; then \
gcc -c -DHAVE_CONFIG_H -g -I. -I../../gcc-7.1.0/libiberty/../include
-W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic
-D_GNU_SOURCE -fpic ../../gcc-7.1.0/libiberty/cp-demangle.c -o
pic/cp-demangle.o; \
else true; fi
../../gcc-7.1.0/libiberty/cp-demangle.c:4248:1: error: conflicting types for
‘cplus_demangle_print_callback’
cplus_demangle_print_callback (int options,
^
In file included from ../../gcc-7.1.0/libiberty/cp-demangle.c:140:0:
../../gcc-7.1.0/libiberty/../include/demangle.h:715:1: note: previous
declaration of ‘cplus_demangle_print_callback’ was here
cplus_demangle_print_callback (int options,
^
../../gcc-7.1.0/libiberty/cp-demangle.c:4292:1: error: conflicting types for
‘cplus_demangle_print’
cplus_demangle_print (int options, const struct demangle_component *dc,
^
In file included from ../../gcc-7.1.0/libiberty/cp-demangle.c:140:0:
../../gcc-7.1.0/libiberty/../include/demangle.h:695:1: note: previous
declaration of ‘cplus_demangle_print’ was here
cplus_demangle_print (int options,
^
make[3]: *** [cp-demangle.o] Error 1
make[3]: Leaving directory `/home/joris/pkg/gccbld/libiberty'
configured as :
../gcc-7.1.0/configure --prefix=/home/joris --enable-languages=c
--enable-checking=release --disable-nls --disable-multilib
Looking into the conflicting decls the difference is that the source function
has CP_STATIC_IF_GLIBCPP_V3 translating into static whilst demangle.h has it as
extern
>From gcc-bugs-return-563305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:17:05 2017
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Subject: [Bug other/80720] New: gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
Date: Fri, 12 May 2017 06:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80720
Bug ID: 80720
Summary: gcc build fails on libiberty conflicting types:
CP_STATIC_IF_GLIBCPP_V3
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: joriswu at gmail dot com
Target Milestone: ---
When building gcc release 7.1.0 according to https://gcc.gnu.org/install, a
type conflict in building libiberty causes an error.
When building without binutils added to the source tree, buid stops at a
missing libiberty.aq
When building binutils libiberty in a separate dir and copying linbiberty.a, an
error about incorrect relacation type shows.
When unpacking binutils 2.28 into the gcc source dir, the type conflict shows :
if [ x"-fpic" != x ]; then \
gcc -c -DHAVE_CONFIG_H -g -I. -I../../gcc-7.1.0/libiberty/../include
-W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic
-D_GNU_SOURCE -fpic ../../gcc-7.1.0/libiberty/cp-demangle.c -o
pic/cp-demangle.o; \
else true; fi
../../gcc-7.1.0/libiberty/cp-demangle.c:4248:1: error: conflicting types for
‘cplus_demangle_print_callback’
cplus_demangle_print_callback (int options,
^
In file included from ../../gcc-7.1.0/libiberty/cp-demangle.c:140:0:
../../gcc-7.1.0/libiberty/../include/demangle.h:715:1: note: previous
declaration of ‘cplus_demangle_print_callback’ was here
cplus_demangle_print_callback (int options,
^
../../gcc-7.1.0/libiberty/cp-demangle.c:4292:1: error: conflicting types for
‘cplus_demangle_print’
cplus_demangle_print (int options, const struct demangle_component *dc,
^
In file included from ../../gcc-7.1.0/libiberty/cp-demangle.c:140:0:
../../gcc-7.1.0/libiberty/../include/demangle.h:695:1: note: previous
declaration of ‘cplus_demangle_print’ was here
cplus_demangle_print (int options,
^
make[3]: *** [cp-demangle.o] Error 1
make[3]: Leaving directory `/home/joris/pkg/gccbld/libiberty'
configured as :
../gcc-7.1.0/configure --prefix=/home/joris --enable-languages=c
--enable-checking=release --disable-nls --disable-multilib
Looking into the conflicting decls the difference is that the source function
has CP_STATIC_IF_GLIBCPP_V3 translating into static whilst demangle.h has it as
extern
>From gcc-bugs-return-563306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:35:47 2017
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Subject: [Bug other/80720] gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
Date: Fri, 12 May 2017 06:38:00 -0000
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joris <joriswu at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Build| |linux Mint
--- Comment #1 from joris <joriswu at gmail dot com> ---
Further analysis shows the conflict is that the source has 'const' yet the
header has no 'const' qualifier for struct demangle_component
>From gcc-bugs-return-563307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:39:02 2017
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From: "meisenmann.lba@fh-salzburg.ac.at" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80721] New: Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 06:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80721
Bug ID: 80721
Summary: Sorting/Merging of free EH-emergency buffer may wrong
or uncomplete
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: meisenmann.lba@fh-salzburg.ac.at
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Created attachment 41345
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41345&action=edit
Suggested patch to fix order/fragmentation-issue in EH-emergency free-list
Hi!
My following findings describing "only" a minor issue and I'm not sure, whether
this can occur in "real life" or it's important (because, it's for a low-memory
situation):
If EH-emergency buffer are not free in reverse order of allocation, the order
of the free-list may wrong or not all possible merges are processed.
a) If the free-list is empty or the block to free is directly right of the
first item, this free-block is put as head (maybe after merge).
But, if the free-block is left to the first item and not merge-able, it is
sorted/put in as second item (instead of new first head).
b) If a block (to free) has a direct left free-block, it is merged into this;
but there's no check/merge to a direct following right free-block
[-> sub-optimal "fragmentation" within the free list].
IMHO, I will provide a suggested patch (with refactoring/simplification ...
... free to be used, if you are also see this as issue).
Best regards from Salzburg,
Marks
>From gcc-bugs-return-563308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:50:46 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/80713] [8 Regression] recent crash in update_dep_bb
Date: Fri, 12 May 2017 06:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-12
Component|target |tree-optimization
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|recent crash in |[8 Regression] recent crash
|update_dep_bb |in update_dep_bb
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-563309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:51:43 2017
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Subject: [Bug middle-end/80715] NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c
Date: Fri, 12 May 2017 06:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-05-12
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you attach preprocessed source and provide -v output?
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Subject: [Bug preprocessor/80716] Death by Documentation (SEGFAULT)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-563311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:57:44 2017
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Subject: [Bug lto/80717] LTO wrappers segfault if run with absolute path
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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> ---
It seems to work for me:
> /usr/bin/gcc-ar-7 t t.a
t.o
any specific command-line to try? I suppose for me it finds ar with the first
/* Find the wrapped binutils program. */
exe_name = find_a_file (&target_path, PERSONALITY, X_OK);
if (!exe_name)
{
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Subject: [Bug other/80720] gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
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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> ---
dup
*** This bug has been marked as a duplicate of bug 80719 ***
>From gcc-bugs-return-563312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 06:59:35 2017
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I don't think simply unpacking binutils (which release?) into the GCC source
tree is supported or supposed to work.
>From gcc-bugs-return-563314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 07:01:03 2017
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Subject: [Bug other/80719] gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80720 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-563315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 07:05:50 2017
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Subject: [Bug other/80719] gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
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--- Comment #3 from joris <joriswu at gmail dot com> ---
Further analysis shows the conflict is that the source has 'const' yet the
header has no 'const' qualifier for struct demangle_component
Unpacking binutils into the gcc source tree is what the install guide at
https://gcc.gnu.org/install/download.html suggests.
If building binutils separately, the resulting libiberty.a is not compatible
with gcc's expectations, likely related to relocatability.
P.S. the duplicate bug is because bugzilla showed a gateway timeout at submit.
>From gcc-bugs-return-563316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 07:10:17 2017
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Subject: [Bug preprocessor/47857] Pragma once warning when compiling PCH
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Ian Mallett <ian at geometrian dot com> changed:
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--- Comment #7 from Ian Mallett <ian at geometrian dot com> ---
I can also confirm this bug still exists in GCC 7.1.
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Subject: [Bug middle-end/80710] Stack smashing detected in correct code depending on optimization flag
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dr.markus.hoffmann at gmx dot de <dr.markus.hoffmann at gmx dot de> changed:
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--- Comment #3 from dr.markus.hoffmann at gmx dot de <dr.markus.hoffmann at gmx dot de> ---
Well, OK, so I have to switch off omit-frame-pointer... Unless I find another
more compatible solution how to call functions not knowing at compile time, if
they return a struct or not.
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From: "theivorytower at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/80717] LTO wrappers segfault if run with absolute path
Date: Fri, 12 May 2017 07:39:00 -0000
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--- Comment #2 from Hao Zhang <theivorytower at gmail dot com> ---
Thank you for your reply. For me basically any arguments with /usr/bin/gcc-ar
fails with segfault, even running /usr/bin/gcc-ar with no additional arguments
at all.
When I run gcc-ar with gdb (here I don't even need to have the absolute path,
"gdb gcc-ar" fails with segfault), before line 203 of gcc-ar.c, the variable
path.plist consists of the following entries:
{0x6070a0 "/usr/local/sbin/", 0x607010 "/usr/local/bin/", 0x6073c0
"/usr/bin/", 0x607400 "/usr/lib/jvm/default/bin/", 0x607450
"/usr/bin/site_perl/", 0x607490 "/usr/bin/vendor_perl/", 0x6074d0
"/usr/bin/core_perl/"}
After line 203, /usr/bin/ is removed from the list of paths:
{0x6070a0 "/usr/local/sbin/", 0x607010 "/usr/local/bin/", 0x0 , 0x607400
"/usr/lib/jvm/default/bin/", 0x607450 "/usr/bin/site_perl/", 0x607490
"/usr/bin/vendor_perl/", 0x6074d0 "/usr/bin/core_perl/"}
Since the third item is set to 0, strcpy segfaults at file-find.c:81.
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Hao Zhang <theivorytower at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Hao Zhang <theivorytower at gmail dot com> ---
The problem is now fixed with the latest gcc 7.1.1.
>From gcc-bugs-return-563320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 07:55:31 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80722] New: gfortran can not compile omp clause with default(none) when there is a type bind method
Date: Fri, 12 May 2017 08:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80722
Bug ID: 80722
Summary: gfortran can not compile omp clause with default(none)
when there is a type bind method
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 41346
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41346&action=edit
this is the tow file x.f90 and bug.f90
gcc version is 5.3.1, but the version 6.3.1 and 7.1.0 is the same
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.3.1-14ubuntu2'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2)
I compile it with "gfortran -fopenmp x.f90 bug.f90", error happens, it shows:
write(*,*) ss%show()
^
Error: ‘__vtab_module_x_Type_x’ not specified in enclosing parallel
bug.f90:7:0:
!$omp parallel do private(i) shared(ss) num_threads(2) default(none)
^
Error: enclosing parallel
this is the case one.
but if i change omp clause default(none) to default(shared), it is ok of
course(this is case two)
and if i merge the two file into one file then use the same options to compile,
even though it is default(none), it is ok too.(this is case three)
>From gcc-bugs-return-563321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:04:32 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 other/80719] gcc build fails on libiberty conflicting types: CP_STATIC_IF_GLIBCPP_V3
Date: Fri, 12 May 2017 08:08:00 -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> ---
Simply unpacking binutils would require lockstep updates, that the files in the
common directories and toplevel directory that are present in both are
identical at all times. That is almost never the true. So the only way that
works if you want a combined tree build (still, the snapshots have to be
roughly from the same time) is unpack on the side and copy over or symlink the
binutils subdirectories that aren't present in the gcc tree (bfd, opcodes, ld,
as, binutils etc.), for include/ just link/copy over the include/*/
subdirectories that are missing, for libiberty nothing etc.
>From gcc-bugs-return-563322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:08:01 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80723] New: [8 Regression] FAIL gcc.target/i386/cadd.c scan assembler sbb
Date: Fri, 12 May 2017 08:08:00 -0000
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Bug ID: 80723
Summary: [8 Regression] FAIL gcc.target/i386/cadd.c scan
assembler sbb
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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This is a recent failure on 32bit x86 target, where if-conversion is not
performed for some reason (but it is for 32bit target).
gcc -O2 -march=k8
64 bit target:
==============
_.243r.ce1:
;; Function q (q, funcdef_no=0, decl_uid=1821, cgraph_uid=0, symbol_order=1)
0 registers.
9 basic blocks, 10 edges.
4: NOTE_INSN_BASIC_BLOCK 2
2: NOTE_INSN_FUNCTION_BEG
6: r89:DI=`t'
3: r88:SI=0
16: L16:
8: NOTE_INSN_BASIC_BLOCK 3
9: flags:CCZ=cmp([r89:DI],0)
10: pc={(flags:CCZ==0)?L13:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 5000
11: NOTE_INSN_BASIC_BLOCK 4
12: {r88:SI=r88:SI+0x1;clobber flags:CC;}
REG_UNUSED flags:CC
13: L13:
14: NOTE_INSN_BASIC_BLOCK 5
15: {r89:DI=r89:DI+0x4;clobber flags:CC;}
REG_UNUSED flags:CC
17: flags:CCZ=cmp(r89:DI,const(`t'+0x28))
18: pc={(flags:CCZ!=0)?L16:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 9000
19: NOTE_INSN_BASIC_BLOCK 6
20: flags:CCZ=cmp(r88:SI,0x6)
REG_DEAD r88:SI
21: pc={(flags:CCZ==0)?L27:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 9996
22: NOTE_INSN_BASIC_BLOCK 7
23: call [`abort'] argc:0
REG_CALL_DECL `abort'
REG_NORETURN 0
REG_EH_REGION 0
27: L27:
28: NOTE_INSN_BASIC_BLOCK 8
try_optimize_cfg iteration 1
;; 2 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2 3 4 5 6 7 8
;;
;; Loop 1
;; header 3, latch 5
;; depth 1, outer 0
;; nodes: 3 5 4
;; 2 succs { 3 }
;; 3 succs { 4 5 }
;; 4 succs { 5 }
;; 5 succs { 3 6 }
;; 6 succs { 7 8 }
;; 7 succs { }
;; 8 succs { 1 }
starting the processing of deferred insns
ending the processing of deferred insns
df_analyze called
IF-THEN-JOIN block found, pass 1, test 3, then 4, join 5
scanning new insn with uid = 30.
scanning new insn with uid = 31.
if-conversion succeeded through noce_try_addcc
Removing jump 10.
deleting insn with uid = 10.
deleting insn with uid = 12.
deleting block 4
Conversion succeeded on pass 1.
IF-CASE-2 found, start 6, else 8
32 bit target:
==============
;; Function q (q, funcdef_no=0, decl_uid=1760, cgraph_uid=0, symbol_order=1)
0 registers.
9 basic blocks, 10 edges.
5: NOTE_INSN_BASIC_BLOCK 2
2: NOTE_INSN_FUNCTION_BEG
3: r90:SI=0
4: r88:SI=0
16: L16:
7: NOTE_INSN_BASIC_BLOCK 3
9: flags:CCZ=cmp([r90:SI*0x4+`t'],0)
10: pc={(flags:CCZ==0)?L13:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 5000
11: NOTE_INSN_BASIC_BLOCK 4
12: {r88:SI=r88:SI+0x1;clobber flags:CC;}
REG_UNUSED flags:CC
13: L13:
14: NOTE_INSN_BASIC_BLOCK 5
15: {r90:SI=r90:SI+0x1;clobber flags:CC;}
REG_UNUSED flags:CC
17: flags:CCZ=cmp(r90:SI,0xa)
18: pc={(flags:CCZ!=0)?L16:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 9000
19: NOTE_INSN_BASIC_BLOCK 6
20: flags:CCZ=cmp(r88:SI,0x6)
REG_DEAD r88:SI
21: pc={(flags:CCZ==0)?L27:pc}
REG_DEAD flags:CCZ
REG_BR_PROB 9996
22: NOTE_INSN_BASIC_BLOCK 7
23: call [`abort'] argc:0
REG_CALL_DECL `abort'
REG_NORETURN 0
REG_EH_REGION 0
27: L27:
28: NOTE_INSN_BASIC_BLOCK 8
try_optimize_cfg iteration 1
;; 2 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2 3 4 5 6 7 8
;;
;; Loop 1
;; header 3, latch 5
;; depth 1, outer 0
;; nodes: 3 5 4
;; 2 succs { 3 }
;; 3 succs { 4 5 }
;; 4 succs { 5 }
;; 5 succs { 3 6 }
;; 6 succs { 7 8 }
;; 7 succs { }
;; 8 succs { 1 }
starting the processing of deferred insns
ending the processing of deferred insns
df_analyze called
IF-THEN-JOIN block found, pass 1, test 3, then 4, join 5
IF-CASE-2 found, start 6, else 8
AFAICS, the starting sequence is almost equal (32bit target has more complex
memory access, but it shouldn't matter here), so it should also be converted
through noce_try_addcc on 32bit targets.
>From gcc-bugs-return-563323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:08:59 2017
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Subject: [Bug rtl-optimization/80723] [8 Regression] FAIL gcc.target/i386/cadd.c scan assembler sbb
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i686
CC| |jakub at redhat dot com
Target Milestone|--- |8.0
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Adding Jakub to CC.
>From gcc-bugs-return-563324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:18:07 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 libstdc++/80721] Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 08:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-12
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Isn't it enough to add, after
else if (reinterpret_cast <char *> (e) + sz
== reinterpret_cast <char *> (first_free_entry))
{
...
a
else if (reinterpret_cast <char *> (e)
< reinterpret_cast <char *> (first_free_entry))
{
// First is right of us, replace the head.
free_entry *f = reinterpret_cast <free_entry *> (e);
new (f) free_entry;
f->next = first_free_entry;
first_free_entry = f;
}
? That's a much less intrusive (and hard to review) fix.
>From gcc-bugs-return-563325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:21:22 2017
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Subject: [Bug middle-end/80715] NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c
Date: Fri, 12 May 2017 08:28:00 -0000
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--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
gcc gccerr55.c -O2 -flive-range-shrinkage -E
# 1 "gccerr55.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "gccerr55.c"
# 25 "gccerr55.c"
void f()
{
}
gcc gccerr55.c -O2 -flive-range-shrinkage -v -S
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/vitti/local/gcc-7.1.0
--enable-languages=c,c++,fortran --enable-bootstrap
Thread model: posix
gcc version 7.1.0 (GCC)
COLLECT_GCC_OPTIONS='-O2' '-flive-range-shrinkage' '-v' '-S'
'-mtune=generic' '-march=x86-64'
/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.1.0/cc1
-quiet -v -iprefix
/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/
gccerr55.c -quiet -dumpbase gccerr55.c -mtune=generic -march=x86-64
-auxbase gccerr55 -O2 -version -flive-range-shrinkage -o gccerr55.s
GNU C11 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.1.1, MPFR version
3.1.5, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../x86_64-pc-linux-gnu/include"
ignoring duplicate directory
"/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/7.1.0/include"
ignoring duplicate directory
"/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/7.1.0/include-fixed"
ignoring nonexistent directory
"/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../x86_64-pc-linux-gnu/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/tbb/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/ipp/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/mkl/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/pstl/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/tbb/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/tbb/include"
ignoring duplicate directory
"/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/daal/include"
#include "..." search starts here:
#include <...> search starts here:
/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/ipp/include
/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/mkl/include
/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/pstl/include
/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/tbb/include
/home/vitti/intel18/compilers_and_libraries_2018.0.061/linux/daal/include
/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/include
/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/include-fixed
/usr/local/include
/home/vitti/1tb/vitti/local/gcc-7.1.0/bin/../lib/gcc/../../include
/usr/include
End of search list.
GNU C11 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.1.1, MPFR version
3.1.5, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: d7ed344a9ac7cfb4ff4debc46fef710a
gccerr55.c: In function ‘f’:
gccerr55.c:27:1: internal compiler error: in find_costs_and_classes,
at ira-costs.c:1748
}
^
0x863be3 find_costs_and_classes
../../gcc/gcc/ira-costs.c:1748
0x864959 ira_costs()
../../gcc/gcc/ira-costs.c:2261
0x85e356 ira_build()
../../gcc/gcc/ira-build.c:3420
0x855ccb ira
../../gcc/gcc/ira.c:5302
0x855ccb execute
../../gcc/gcc/ira.c:5613
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-563326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:28:29 2017
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Subject: [Bug target/80723] [8 Regression] FAIL gcc.target/i386/cadd.c scan assembler sbb
Date: Fri, 12 May 2017 08:40:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |target
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
This is a cost issue.
>From gcc-bugs-return-563328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:45:58 2017
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Subject: [Bug c++/67983] ICE: Error reporting routines re-entered.
Date: Fri, 12 May 2017 08:45:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |6.2
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed between 6.1 and 6.2. It's a duplicate of another bug I resolved recently,
I'll see if I can find it.
>From gcc-bugs-return-563327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:40:53 2017
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Subject: [Bug middle-end/80715] NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c
Date: Fri, 12 May 2017 08:45:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, it works for me just fine.
>From gcc-bugs-return-563329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:45:59 2017
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From: "meisenmann.lba@fh-salzburg.ac.at" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80721] Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 08:50:00 -0000
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--- Comment #2 from Markus Eisenmann <meisenmann.lba@fh-salzburg.ac.at> ---
Hi!
(In reply to Richard Biener from comment #1)
> Confirmed. Isn't it enough to add, after
>
> else if (reinterpret_cast <char *> (e) + sz
> == reinterpret_cast <char *> (first_free_entry))
> {
> ...
>
> a
>
> else if (reinterpret_cast <char *> (e)
> < reinterpret_cast <char *> (first_free_entry))
> {
> // First is right of us, replace the head.
> free_entry *f = reinterpret_cast <free_entry *> (e);
> new (f) free_entry;
> f->next = first_free_entry;
> first_free_entry = f;
> }
>
> ? That's a much less intrusive (and hard to review) fix.
Okay, a less intrusive fix for issue a) [set in front, if free-list is empty
or starts with a non merge-able block on a higher address]
Instead of (sorry, not fully formatted as unified diff), my suggestion would:
allocated_entry *e = reinterpret_cast <allocated_entry *>
(reinterpret_cast <char *> (data) - offsetof (allocated_entry, data));
std::size_t sz = e->size;
- if (!first_free_entry)
+ if (!first_free_entry
+ || (reinterpret_cast <char *> (e) + sz
+ < reinterpret_cast <char *> (first_free_entry)))
{
// If the free list is empty just put the entry there.
free_entry *f = reinterpret_cast <free_entry *> (e);
new (f) free_entry;
f->size = sz;
- f->next = NULL;
+ f->next = first_free_entry;
first_free_entry = f;
}
else if (reinterpret_cast <char *> (e) + sz
I.e., set in front if first_free_entry = null or has to be first, because non
merge-able and a "right" item.
Note: Following Merging with head will be "is-as-is";
About issue b) - additional merging with direct right follower - I have to
think a little about ...
Best regards,
Markus
>From gcc-bugs-return-563330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 08:50:25 2017
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Fri, 12 May 2017 09:05:00 -0000
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--- Comment #5 from David Binderman <dcb314 at hotmail dot com> ---
Seems to work for me.
>From gcc-bugs-return-563331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 09:05:05 2017
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Subject: [Bug rtl-optimization/80709] [8 Regression] ICE in setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
Date: Fri, 12 May 2017 09:07:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Configured with: ../configure --disable-bootstrap --target=arm-linux-gnueabihf
Thread model: posix
$ ./cc1plus -fpreprocessed /home/marxin/Programming/testcases/arm.ii -quiet
-dumpbase arm.ii -mtls-dialect=gnu -auxbase arm -O2 -version -fdump-rtl-all -o
arm.s
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Subject: [Bug rtl-optimization/80709] [8 Regression] ICE in setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2017-5-12
--- Comment #3 from ktkachov at gcc dot gnu.org ---
Thanks, I can reproduce it with -O2 -mcpu=arm7tdmi -mfloat-abi=soft -marm
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Subject: [Bug middle-end/69921] Switch OpenACC kernels number of gangs from "decide at run time" to "decide at compile time"
Date: Fri, 12 May 2017 09:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69921
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri May 12 09:18:34 2017
New Revision: 247957
URL: https://gcc.gnu.org/viewcvs?rev=247957&root=gcc&view=rev
Log:
[PR middle-end/69921] Use "oacc kernels parallelized" attribute for
parallelized OpenACC kernels
gcc/
PR middle-end/69921
* tree-parloops.c (create_parallel_loop): Set "oacc kernels
parallelized" attribute for parallelized OpenACC kernels.
* omp-offload.c (execute_oacc_device_lower): Use it.
gcc/testsuite/
* c-c++-common/goacc/classify-kernels-unparallelized.c: Adjust.
* c-c++-common/goacc/classify-kernels.c: Likewise.
* c-c++-common/goacc/kernels-counter-vars-function-scope.c:
Likewise.
* c-c++-common/goacc/kernels-double-reduction-n.c: Likewise.
* c-c++-common/goacc/kernels-double-reduction.c: Likewise.
* c-c++-common/goacc/kernels-loop-2.c: Likewise.
* c-c++-common/goacc/kernels-loop-3.c: Likewise.
* c-c++-common/goacc/kernels-loop-g.c: Likewise.
* c-c++-common/goacc/kernels-loop-mod-not-zero.c: Likewise.
* c-c++-common/goacc/kernels-loop-n.c: Likewise.
* c-c++-common/goacc/kernels-loop-nest.c: Likewise.
* c-c++-common/goacc/kernels-loop.c: Likewise.
* c-c++-common/goacc/kernels-one-counter-var.c: Likewise.
* c-c++-common/goacc/kernels-reduction.c: Likewise.
* gfortran.dg/goacc/classify-kernels-unparallelized.f95: Likewise.
* gfortran.dg/goacc/classify-kernels.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-enter-exit-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-enter-exit.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-update.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-n.f95: Likewise.
* gfortran.dg/goacc/kernels-loop.f95: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-offload.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/goacc/classify-kernels-unparallelized.c
trunk/gcc/testsuite/c-c++-common/goacc/classify-kernels.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-counter-vars-function-scope.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-double-reduction-n.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-double-reduction.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-2.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-3.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-g.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-mod-not-zero.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-n.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop-nest.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-loop.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-one-counter-var.c
trunk/gcc/testsuite/c-c++-common/goacc/kernels-reduction.c
trunk/gcc/testsuite/gfortran.dg/goacc/classify-kernels-unparallelized.f95
trunk/gcc/testsuite/gfortran.dg/goacc/classify-kernels.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-2.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-2.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-enter-exit-2.f95
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trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-update.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop-n.f95
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-loop.f95
trunk/gcc/tree-parloops.c
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Subject: [Bug middle-end/69921] Switch OpenACC kernels number of gangs from "decide at run time" to "decide at compile time"
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--- Comment #3 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri May 12 09:20:35 2017
New Revision: 247958
URL: https://gcc.gnu.org/viewcvs?rev=247958&root=gcc&view=rev
Log:
[PR middle-end/69921] Use "oacc kernels parallelized" attribute for
parallelized OpenACC kernels
gcc/
PR middle-end/69921
* tree-parloops.c (create_parallel_loop): Set "oacc kernels
parallelized" attribute for parallelized OpenACC kernels.
* omp-low.c (execute_oacc_device_lower): Use it.
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims): Likewise.
* omp-low.c (set_oacc_fn_attrib): Make it "static".
* omp-low.h (set_oacc_fn_attrib): Remove prototype.
gcc/testsuite/
* c-c++-common/goacc/classify-kernels-unparallelized.c: Adjust.
* c-c++-common/goacc/classify-kernels.c: Likewise.
* c-c++-common/goacc/kernels-acc-loop-reduction.c: Likewise.
* c-c++-common/goacc/kernels-acc-loop-smaller-equal.c: Likewise.
* c-c++-common/goacc/kernels-counter-vars-function-scope.c:
Likewise.
* c-c++-common/goacc/kernels-double-reduction-n.c: Likewise.
* c-c++-common/goacc/kernels-double-reduction.c: Likewise.
* c-c++-common/goacc/kernels-loop-2-acc-loop.c: Likewise.
* c-c++-common/goacc/kernels-loop-2.c: Likewise.
* c-c++-common/goacc/kernels-loop-3-acc-loop.c: Likewise.
* c-c++-common/goacc/kernels-loop-3.c: Likewise.
* c-c++-common/goacc/kernels-loop-acc-loop.c: Likewise.
* c-c++-common/goacc/kernels-loop-data-2.c: Likewise.
* c-c++-common/goacc/kernels-loop-data-enter-exit-2.c: Likewise.
* c-c++-common/goacc/kernels-loop-data-enter-exit.c: Likewise.
* c-c++-common/goacc/kernels-loop-data-update.c: Likewise.
* c-c++-common/goacc/kernels-loop-data.c: Likewise.
* c-c++-common/goacc/kernels-loop-g.c: Likewise.
* c-c++-common/goacc/kernels-loop-mod-not-zero.c: Likewise.
* c-c++-common/goacc/kernels-loop-n-acc-loop.c: Likewise.
* c-c++-common/goacc/kernels-loop-n.c: Likewise.
* c-c++-common/goacc/kernels-loop-nest.c: Likewise.
* c-c++-common/goacc/kernels-loop.c: Likewise.
* c-c++-common/goacc/kernels-one-counter-var.c: Likewise.
* c-c++-common/goacc/kernels-parallel-loop-data-enter-exit.c:
Likewise.
* c-c++-common/goacc/kernels-reduction.c: Likewise.
* gfortran.dg/goacc/classify-kernels-unparallelized.f95: Likewise.
* gfortran.dg/goacc/classify-kernels.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-enter-exit-2.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-enter-exit.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data-update.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-data.f95: Likewise.
* gfortran.dg/goacc/kernels-loop-n.f95: Likewise.
* gfortran.dg/goacc/kernels-loop.f95: Likewise.
* gfortran.dg/goacc/kernels-parallel-loop-data-enter-exit.f95:
Likewise.
trunk r247957
Modified:
branches/gomp-4_0-branch/gcc/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/config/nvptx/nvptx.c
branches/gomp-4_0-branch/gcc/omp-low.c
branches/gomp-4_0-branch/gcc/omp-low.h
branches/gomp-4_0-branch/gcc/testsuite/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/classify-kernels-unparallelized.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/classify-kernels.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-acc-loop-reduction.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-acc-loop-smaller-equal.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-counter-vars-function-scope.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-double-reduction-n.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-double-reduction.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-2-acc-loop.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-2.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-3-acc-loop.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-3.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-acc-loop.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-data-2.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-data-enter-exit-2.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-data-enter-exit.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-data-update.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-data.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-g.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-mod-not-zero.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-n-acc-loop.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-n.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop-nest.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-loop.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-one-counter-var.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/kernels-parallel-loop-data-enter-exit.c
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branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/classify-kernels.f95
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branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-2.f95
branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-enter-exit-2.f95
branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/kernels-loop-data-enter-exit.f95
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branches/gomp-4_0-branch/gcc/tree-parloops.c
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Subject: [Bug middle-end/69921] Switch OpenACC kernels number of gangs from "decide at run time" to "decide at compile time"
Date: Fri, 12 May 2017 09:49:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
.
>From gcc-bugs-return-563336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 09:49:19 2017
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Subject: [Bug libstdc++/80721] Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 10:01:00 -0000
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--- Comment #3 from Markus Eisenmann <meisenmann.lba@fh-salzburg.ac.at> ---
Hi Richard!
And now a less-intrusive (suggested) patch to do also a "right" merge
[Sorry, also udiff-like but not fully formatted/with line-info; to see "my"
idea]
----
free_entry **fe;
for (fe = &first_free_entry;
(*fe)->next
&& (reinterpret_cast <char *> ((*fe)->next)
> reinterpret_cast <char *> (e) + sz);
fe = &(*fe)->next)
;
+ // If the next/right block follows immediately to the end of the
block
+ // to free, add its size to current 'free' and unlink it from the
list.
+ if (reinterpret_cast <char *> (e) + sz
+ == reinterpret_cast <char *> ((*fe)->next))
+ {
+ sz += ((*fe)->next)->size;
+ (*fe)->next = ((*fe)->next)->next;
+ }
if (reinterpret_cast <char *> (*fe) + (*fe)->size
== reinterpret_cast <char *> (e))
/* Merge with the freelist entry. */
(*fe)->size += sz;
----
Best regards from Salzburg,
Markus
P.S.: Should I add a (well-formatted) patch-file, containing these two
proposals?
>From gcc-bugs-return-563337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:01:14 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80721] Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 10:01:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 12 May 2017, meisenmann.lba@fh-salzburg.ac.at wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80721
>
> --- Comment #3 from Markus Eisenmann <meisenmann.lba@fh-salzburg.ac.at> ---
> Hi Richard!
>
> And now a less-intrusive (suggested) patch to do also a "right" merge
> [Sorry, also udiff-like but not fully formatted/with line-info; to see "my"
> idea]
>
> ----
> free_entry **fe;
> for (fe = &first_free_entry;
> (*fe)->next
> && (reinterpret_cast <char *> ((*fe)->next)
> > reinterpret_cast <char *> (e) + sz);
> fe = &(*fe)->next)
> ;
> + // If the next/right block follows immediately to the end of the
> block
> + // to free, add its size to current 'free' and unlink it from the
> list.
> + if (reinterpret_cast <char *> (e) + sz
> + == reinterpret_cast <char *> ((*fe)->next))
> + {
> + sz += ((*fe)->next)->size;
> + (*fe)->next = ((*fe)->next)->next;
> + }
> if (reinterpret_cast <char *> (*fe) + (*fe)->size
> == reinterpret_cast <char *> (e))
> /* Merge with the freelist entry. */
> (*fe)->size += sz;
> ----
>
> Best regards from Salzburg,
> Markus
>
> P.S.: Should I add a (well-formatted) patch-file, containing these two
> proposals?
I'll deal with it and testing / posting the patch. Thanks!
>From gcc-bugs-return-563338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:01:31 2017
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Subject: [Bug libstdc++/80721] Sorting/Merging of free EH-emergency buffer may wrong or uncomplete
Date: Fri, 12 May 2017 10:10:00 -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 #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-563339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:10:33 2017
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
Date: Fri, 12 May 2017 10:18:00 -0000
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--- Comment #6 from ak at gcc dot gnu.org ---
Author: ak
Date: Fri May 12 10:09:50 2017
New Revision: 247962
URL: https://gcc.gnu.org/viewcvs?rev=247962&root=gcc&view=rev
Log:
Limit perf data buffer during profiling
With high -j parallelism the autofdo tests can randomly fail.
autofdo uses Linux perf to record profiling data.
Linux perf uses a locked perf buffer. By default it has
around 516k buffer per uid (/proc/sys/kernel/perf_event_mlock_kb).
An individual perf record tries to grab the full 516k,
which makes parallel perf record fail.
This patch limits the perf buffer for individual perf record to 8k.
With the default settings this allows a parallelism of the test
cases of 16, which is hopefully good enough
(if not would need to add some kind of semaphore, or ask
the user to increase the limit as root)
I also removed an unneeded -o perf.data option
Thanks to Marcin to finally spotting the problem.
Passes bootstrap and test on x86_64-linux. Ok for trunk?
gcc/testsuite/:
2017-05-12 Andi Kleen <ak@linux.intel.com>
PR testsuite/77684
* lib/target-supports.exp (profopt-perf-wrapper):
Add -m8 option to increase parallelism.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/lib/target-supports.exp
>From gcc-bugs-return-563340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:18:11 2017
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Subject: [Bug middle-end/80710] Stack smashing detected in correct code depending on optimization flag
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Why not look into something like libffi?
>From gcc-bugs-return-563341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:23:48 2017
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Subject: [Bug c++/67687] ICE initializing constexpr member with constexpr constructor
Date: Fri, 12 May 2017 10:25:00 -0000
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed in 7.1.0, I'm adding a testcase and closing the bug.
>From gcc-bugs-return-563342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:25:03 2017
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Subject: [Bug tree-optimization/14541] [tree-ssa] built-in math functions are not fully optimized at tree level
Date: Fri, 12 May 2017 10:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
This has been fixed with moving almost all mathfn foldings from builtins.c to
match.pd.
>From gcc-bugs-return-563343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 10:40:37 2017
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Subject: [Bug tree-optimization/80724] New: gcc.target/aarch64/pr62178.c failed because of r247885
Date: Fri, 12 May 2017 10:42:00 -0000
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Bug ID: 80724
Summary: gcc.target/aarch64/pr62178.c failed because of r247885
Product: gcc
Version: 8.0
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After r247885, test gcc.target/aarch64/pr62178.c failed as below:
gcc.target/aarch64/pr62178.c scan-assembler ld1r\\t{v[0-9]+.
Firstly, innermost loop after ivopt is:
<bb 12> [26.32%]:
# vectp_b.12_66 = PHI <vectp_b.12_67(13), vectp_b.12_64(11)>
# vect__5.16_70 = PHI <vect__5.16_71(13), { 0, 0, 0, 0 }(11)>
# ivtmp.56_96 = PHI <ivtmp.56_97(13), ivtmp.56_98(11)>
_102 = (void *) ivtmp.56_96;
_2 = MEM[base: _102, offset: 4B];
vect_cst__62 = {_2, _2, _2, _2};
vect__3.14_68 = MEM[base: vectp_b.12_66, offset: 0B];
vect__4.15_69 = vect_cst__62 * vect__3.14_68;
vect__5.16_71 = vect__4.15_69 + vect__5.16_70;
vectp_b.12_67 = vectp_b.12_66 + 124;
ivtmp.56_97 = ivtmp.56_96 + 4;
_112 = (vector(4) int *) ivtmp.68_106;
if (vectp_b.12_67 != _112)
goto <bb 13>; [96.66%]
else
goto <bb 14>; [3.34%]
<bb 13> [25.44%]:
goto <bb 12>; [100.00%]
Note candidate ivtmp.56_96 is shifted by 4, thus MEM[base: _102, offset: 4B] is
generated rather than:
_2 = MEM[base: _102, offset: 0B];
Which combined with vect_cst__62 = {_2, _2, _2, _2}; ld1r can be used.
IVOPTs has no knowledge that MEM[base + 4] has different outcome to MEM[base]
in this case.
For this iv_use:
Group 0:
Type: ADDRESS
Use 0.0:
At stmt: _2 = a[i_27][k_29];
At pos: a[i_27][k_29]
IV struct:
Type: int *
Base: (int *) (&a + ((sizetype) i_27 * 124 + 4))
Step: 4
Object: (void *) &a
Biv: N
Overflowness wrto loop niter: Overflow
There are two candidates:
Candidate 13:
Var befor: ivtmp.55
Var after: ivtmp.55
Incr POS: before exit test
IV struct:
Type: unsigned long
Base: (unsigned long) (&a + ((sizetype) i_27 * 124 + 4))
Step: 4
Object: (void *) &a
Biv: N
Overflowness wrto loop niter: Overflow
Applying pattern match.pd:1902, generic-match.c:9693
Candidate 14:
Var befor: ivtmp.56
Var after: ivtmp.56
Incr POS: before exit test
IV struct:
Type: unsigned long
Base: (unsigned long) (&a + (sizetype) i_27 * 124)
Step: 4
Object: (void *) &a
Biv: N
Overflowness wrto loop niter: Overflow
The cost is as below:
<Candidate Costs>:
cand cost
0 5
1 5
2 5
3 5
4 4
5 5
6 5
7 5
8 5
9 5
10 5
11 5
12 5
13 6
14 5
<Group-candidate Costs>:
Group 0:
cand cost compl. inv.expr. inv.vars
1 2 2 1; NIL;
2 2 2 2; NIL;
3 1 2 3; NIL;
13 0 0 NIL; NIL;
14 0 1 NIL; NIL;
Note we choose cand_14 only because cost of cand_13 itself is higher than
cand_14.
This is because the loop iterates 30 times, and we have:
cand_13
base: (unsigned long) (&a + ((sizetype) i_27 * 124 + 4))
cost: 33 (before amortize against loop niter) / 30 = 1
cand_14
base: (unsigned long) (&a + (sizetype) i_27 * 124)
cost: 29 (before amortize against loop niter) / 30 = 0
Note, we are on the verge of loop niters.
With this ivopts issue, the inner most loop should have only one more
instruction. Unfortunately before RTL combine, we have:
74: r74:SI=[++r99:DI]
REG_INC r99:DI
75: r123:V4SI=[post r90:DI+=0x7c]
REG_INC r90:DI
77: r124:V4SI=vec_duplicate(r74:SI)
REG_DEAD r74:SI
78: r126:V4SI=r123:V4SI*r124:V4SI
REG_DEAD r124:V4SI
REG_DEAD r123:V4SI
79: r93:V4SI=r93:V4SI+r126:V4SI
REG_DEAD r126:V4SI
Combine pass tries to combine 77/78, rather than 78/79, like:
74: r74:SI=[++r99:DI]
REG_INC r99:DI
75: r123:V4SI=[post r90:DI+=0x7c]
REG_INC r90:DI
77: NOTE_INSN_DELETED
78: r126:V4SI=vec_duplicate(r74:SI)*r123:V4SI
REG_DEAD r74:SI
REG_DEAD r123:V4SI
79: r93:V4SI=r93:V4SI+r126:V4SI
REG_DEAD r126:V4SI
So it misses mul+add combination, but combined an pattern which has generate
two instructions:
fmov s3, w0 // 157 *movsi_aarch64/12 [length = 4]
mul v0.4s, v0.4s, v3.s[0] // 78 *aarch64_mul3_elt_from_dupv4si
[length = 4]
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Subject: [Bug tree-optimization/80724] gcc.target/aarch64/pr62178.c failed because of r247885
Date: Fri, 12 May 2017 10:44:00 -0000
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--- Comment #1 from amker at gcc dot gnu.org ---
Also, the test case is fragile because we check instructions for a gimple level
transformation. Note, though the case is regressed, the original bug in
PR62178 remains fixed.
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Subject: [Bug tree-optimization/23094] store ccp, or store copy prop misses an optimization
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #9375|0 |1
is obsolete| |
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 41347
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41347&action=edit
patch I'm sitting on
So this is the patch I am sitting on for a while. It's reasonably a cheap
trick but is at the same time easily fooled by an intermediate (non-aliasing)
store
like in
float *f;
int g(int *a, int *b)
{
int x = *b;
*f = 1.;
*a = x;
return *b;
}
which is why I haven't pushed it sofar. OTOH it might be good enough for
the most cases.
To make it more general one would need to store the seen value somewhere
and verify we can use it. A bit hackish I'd say (well, a new global var
would do, not that we don't already have this kind).
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Subject: [Bug c++/67687] ICE initializing constexpr member with constexpr constructor
Date: Fri, 12 May 2017 10:49:00 -0000
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
In fact it's fixed for 6.4.0 too.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
The desired cleanup is to make POINTER_PLUS_EXPR take a signed offset argument,
aka ssizetype instead of sizetype.
Bin was working on this at some point, so was I ... Bin, can you paste the
result (aka fallout) of your experiment(s)?
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Subject: [Bug tree-optimization/80713] [8 Regression] recent crash in update_dep_bb
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 12 10:54:29 2017
New Revision: 247963
URL: https://gcc.gnu.org/viewcvs?rev=247963&root=gcc&view=rev
Log:
2017-05-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/80713
* tree-ssa-pre.c (remove_dead_inserted_code): Clear
inserted_exprs bit for not removed stmts.
* gcc.dg/torture/pr80713.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr80713.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
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Subject: [Bug c++/67687] ICE initializing constexpr member with constexpr constructor
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Fri May 12 11:24:56 2017
New Revision: 247964
URL: https://gcc.gnu.org/viewcvs?rev=247964&root=gcc&view=rev
Log:
2017-05-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/67687
* g++.dg/cpp0x/constexpr-ice17.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-ice17.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/67687] ICE initializing constexpr member with constexpr constructor
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
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Bug 55004 depends on bug 67687, which changed state.
Bug 67687 Summary: ICE initializing constexpr member with constexpr constructor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67687
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug c++/49604] forward-declared enum's elements in class scope gets default access (class vs struct)
Date: Fri, 12 May 2017 11:52:00 -0000
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed in 7.1.0. I'm adding testcases and closing the bug.
>From gcc-bugs-return-563353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 11:52:39 2017
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Subject: [Bug tree-optimization/80713] [8 Regression] recent crash in update_dep_bb
Date: Fri, 12 May 2017 12:06:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Should be fixed.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80725] New: s390x ICE on alsa-lib
Date: Fri, 12 May 2017 12:11:00 -0000
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Bug ID: 80725
Summary: s390x ICE on alsa-lib
Product: gcc
Version: 7.1.1
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The following testcase reduced from alsa-lib ICEs on s390x with -O2
-march=zEC12:
int a, e;
const char b;
char c;
const int d;
void bar (short);
void
foo (int x, int y)
{
long f = d;
short g = 0;
while (e)
while (a < x)
{
if (y)
goto *d;
g = b | b + g;
bar (g);
c = (char) (long) foo;
}
}
The problem is in indirect jump, which is fine before LRA:
(jump_insn 13 12 14 3 (set (pc)
(reg/v:DI 66 [ f ])) "rh1450353.c":16 1922 {*indirect_jump}
(expr_list:REG_DEAD (reg/v:DI 66 [ f ])
(nil)))
but starting with *.reload it is:
(jump_insn 13 12 14 3 (set (pc)
(reg/v:DI 24 %f8 [orig:66 f ] [66])) "rh1450353.c":16 1922
{*indirect_jump}
(nil))
which for some strange reason happily satisfies the ZR constraint, as neither
s390_decompose_address, nor s390_check_qrst_address nor s390_mem_constraint
performs any verification of the hard registers in there (it is fine if it
accepts pseudos, but for hard registers it would be nice if it checked
what s390_legitimate_address_p checks.
>From gcc-bugs-return-563355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 12:11:24 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 sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
Date: Fri, 12 May 2017 12:38:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 41348
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41348&action=edit
Patch candidate
Sending untested patch. Can you please attach original pre-processed source
file from emacs. I would like to see how the problematic expression looks in
original.
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Subject: [Bug middle-end/80710] Stack smashing detected in correct code depending on optimization flag
Date: Fri, 12 May 2017 12:46:00 -0000
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--- Comment #5 from dr.markus.hoffmann at gmx dot de <dr.markus.hoffmann at gmx dot de> ---
Hm, wow, thank you. I did not know it. Maybe rather depend on one more library
than have undefined and probably non-portable code....
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Subject: [Bug go/64238] ICE in get_partitioning_class, at symtab.c:1775
Date: Fri, 12 May 2017 13:20:00 -0000
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #12)
> Thanks, should be fixed now.
I can confirm that it fixed the problem.
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Subject: [Bug c++/49604] forward-declared enum's elements in class scope gets default access (class vs struct)
Date: Fri, 12 May 2017 13:21:00 -0000
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--- Comment #7 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Fri May 12 13:20:21 2017
New Revision: 247969
URL: https://gcc.gnu.org/viewcvs?rev=247969&root=gcc&view=rev
Log:
2017-05-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/49604
* g++.dg/cpp0x/forw_enum14.C: New.
* g++.dg/cpp0x/forw_enum15.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/forw_enum14.C
trunk/gcc/testsuite/g++.dg/cpp0x/forw_enum15.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/49604] forward-declared enum's elements in class scope gets default access (class vs struct)
Date: Fri, 12 May 2017 13:27:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
>From gcc-bugs-return-563360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 13:27:53 2017
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Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Fri, 12 May 2017 13:31:00 -0000
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--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Still broken over a week later and I notice this bug report is
not assigned to anyone.
I notice that hubicka has done seven of the last ten changes
in the ipa-inline-analysis.c.
Maybe they are the best person to comment further ?
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Subject: [Bug target/80725] [7/8 Regression] s390x ICE on alsa-lib
Date: Fri, 12 May 2017 13:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80725
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-12
Target Milestone|--- |7.2
Summary|s390x ICE on alsa-lib |[7/8 Regression] s390x ICE
| |on alsa-lib
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r246456. Perhaps the problem is that there are now 2 identical
patterns with different predicates, where that %f8 satisfies
nonimmediate_operand, but not address_operand and the constraint checking
doesn't verify what the predicate checks.
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Subject: [Bug target/80725] [7/8 Regression] s390x ICE on alsa-lib
Date: Fri, 12 May 2017 14:43:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Tried
--- s390.c.jj1 2017-04-25 15:54:34.000000000 +0200
+++ s390.c 2017-05-12 15:33:15.816668225 +0200
@@ -3210,6 +3210,8 @@ s390_mem_constraint (const char *str, rt
return 0;
break;
case 'Z':
+ if (str[1] == 'R' && !address_operand (op, VOIDmode))
+ return 0;
return s390_check_qrst_address (str[1], op, true);
default:
return 0;
as a hack, but that ICEs elsewhere:
rh1450353.c:21:1: error: insn does not satisfy its constraints:
}
^
(jump_insn 13 12 14 3 (set (pc)
(reg/v:DI 24 %f8 [orig:66 f ] [66])) "rh1450353.c":16 1922
{*indirect_jump}
(nil))
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Subject: [Bug libstdc++/78939] [C++17] <tuple> interferes with structured binding from struct
Date: Fri, 12 May 2017 14:45:00 -0000
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri May 12 14:43:11 2017
New Revision: 247973
URL: https://gcc.gnu.org/viewcvs?rev=247973&root=gcc&view=rev
Log:
PR libstdc++/78939 make tuple_size<cv T> depend on tuple_size<T>
PR libstdc++/78939
* include/std/utility (tuple_size<cv T>): Only define partial
specializations when tuple_size<T>::value is valid.
* testsuite/20_util/tuple/78939.cc: New.
* testsuite/20_util/tuple/cv_tuple_size_neg.cc: New.
Added:
trunk/libstdc++-v3/testsuite/20_util/tuple/78939.cc
trunk/libstdc++-v3/testsuite/20_util/tuple/cv_tuple_size_neg.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/utility
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Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Fri, 12 May 2017 15:25:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 41349
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41349&action=edit
Patch candidate
Yep, it's Honza Hubicka's PR. I'm suggesting a new function that will handle
round off errors in sreal.
Can you please Honza take a look? Can you Dmitry test it?
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Subject: [Bug tree-optimization/80726] New: Destructor not inlined anymore (regression)
Date: Fri, 12 May 2017 15:53:00 -0000
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Bug ID: 80726
Summary: Destructor not inlined anymore (regression)
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: cuzdav at gmail dot com
Target Milestone: ---
Inlining regression with noexcept(true) destructor that could possible throw,
but doesn't.
This code demonstrates that in main(), the destructor for Foo is no longer
inlined using g++ 7.1 -O3 (also with the 8.0 snapshot). On the 6.x series it
is inlined.
Source:
// ---------------------------------------
bool shouldThrow = false;
struct Foo {
~Foo() {
if (shouldThrow) throw "hmm";
}
};
int main() {
Foo f;
}// ---------------------------------------
As evidenced on godbolt.org, for g++7.1, main() has function call for
destructor
.LC0:
.string "hmm"
Foo::~Foo():
movzx eax, BYTE PTR shouldThrow[rip]
test al, al
jne .L7
rep ret
.L7:
mov edi, 8
sub rsp, 8
call __cxa_allocate_exception
xor edx, edx
mov QWORD PTR [rax], OFFSET FLAT:.LC0
mov esi, OFFSET FLAT:typeinfo for char const*
mov rdi, rax
call __cxa_throw
main:
sub rsp, 24
lea rdi, [rsp+15]
call Foo::~Foo()
xor eax, eax
add rsp, 24
ret
shouldThrow:
.zero 1
But with 6.3 the destructor is inlined:
.LC0:
.string "hmm"
main:
movzx eax, BYTE PTR shouldThrow[rip]
test al, al
jne .L7
xor eax, eax
ret
.L7:
mov edi, 8
sub rsp, 8
call __cxa_allocate_exception
xor edx, edx
mov QWORD PTR [rax], OFFSET FLAT:.LC0
mov esi, OFFSET FLAT:typeinfo for char const*
mov rdi, rax
call __cxa_throw
shouldThrow:
.zero 1
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Subject: [Bug libstdc++/78939] [C++17] <tuple> interferes with structured binding from struct
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--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri May 12 15:53:19 2017
New Revision: 247978
URL: https://gcc.gnu.org/viewcvs?rev=247978&root=gcc&view=rev
Log:
PR libstdc++/78939 make tuple_size<cv T> depend on tuple_size<T>
PR libstdc++/78939
* include/std/utility (tuple_size<cv T>) [__cplusplus > 201402L]:
Only define partial specializations when tuple_size<T>::value is
valid.
* testsuite/20_util/tuple/78939.cc: New.
Added:
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/tuple/78939.cc
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/std/utility
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Subject: [Bug libstdc++/78939] [C++17] <tuple> interferes with structured binding from struct
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.2
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Subject: [Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
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--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri May 12 15:55:46 2017
New Revision: 247979
URL: https://gcc.gnu.org/viewcvs?rev=247979&root=gcc&view=rev
Log:
* system-linux-arm.ads (Memory_Size): Use Long_Integer'Size
instead of Word_Size.
Revert
2017-03-28 Andreas Schwab <schwab@suse.de>
PR ada/80117
* system-linux-aarch64-ilp32.ads: New file.
* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
from LIBGNAT_TARGET_PAIRS.
(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
or -mabi=ilp32, resp.
Removed:
trunk/gcc/ada/system-linux-aarch64-ilp32.ads
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/Makefile.in
trunk/gcc/ada/system-linux-arm.ads
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Subject: [Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
Date: Fri, 12 May 2017 16:03:00 -0000
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--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri May 12 15:58:34 2017
New Revision: 247980
URL: https://gcc.gnu.org/viewcvs?rev=247980&root=gcc&view=rev
Log:
* system-linux-arm.ads (Memory_Size): Use Long_Integer'Size
instead of Word_Size.
Revert
2017-03-28 Andreas Schwab <schwab@suse.de>
PR ada/80117
* system-linux-aarch64-ilp32.ads: New file.
* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
from LIBGNAT_TARGET_PAIRS.
(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
or -mabi=ilp32, resp.
Removed:
branches/gcc-7-branch/gcc/ada/system-linux-aarch64-ilp32.ads
Modified:
branches/gcc-7-branch/gcc/ada/ChangeLog
branches/gcc-7-branch/gcc/ada/gcc-interface/Makefile.in
branches/gcc-7-branch/gcc/ada/system-linux-arm.ads
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80715] NULL pointer dereferenced in find_costs_and_classes, at ira-costs.c
Date: Fri, 12 May 2017 16:07:00 -0000
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
I see the ICE on trunk 247930.
To reproduce it you need ira_assert working,
definining ENABLE_IRA_CHECKING implied by CHECKING_P,
best way to make it happen is configuring gcc with --enable-checking=yes
option.
Have the following lines:
ira_assert(cost_classes_ptr);/*!vz my addition pr60268.c -O2
-flive-range-shrinkage*/
enum reg_class *cost_classes = cost_classes_ptr->classes;
and compile with both options -O2 -flive-range-shrinkage
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Fri, 12 May 2017 16:26:00 -0000
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
It works. Thanks.
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Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Fri, 12 May 2017 16:28:00 -0000
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Pat Haugen <pthaugen at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pthaugen at gcc dot gnu.org
--- Comment #6 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> Created attachment 41349 [details]
> Patch candidate
>
> Yep, it's Honza Hubicka's PR. I'm suggesting a new function that will handle
> round off errors in sreal.
>
> Can you please Honza take a look? Can you Dmitry test it?
I just ran into the same ICE and the proposed patch fixes the problem.
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From: "user1 at lpetrov dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/80727] New: Crash of runtime gfortran library during integer transformation
Date: Fri, 12 May 2017 16:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80727
Bug ID: 80727
Summary: Crash of runtime gfortran library during integer
transformation
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
Reporter: user1 at lpetrov dot net
Target Milestone: ---
Dear gcc developers,
Thank for maintaining the gcc collection. Recently I compiled from sources
gcc 7.1.0 and I found a bug in gfortran IO library. That example works
correctly under gcc 5.1.0 and 6.1.0
See below:
1) source file gfortran_710_io_bug.f
2) gfortran_710_io_bug.comp -- result of command line
gfortran -v -save-temps -fno-underscoring -ffree-form -o
gfortran_710_io_bug.e gfortran_710_io_bug.f
3) gfortran_710_io_bug.out -- result of running affected program:
./gfortran_710_io_bug.e
/tmp> uname -a
Linux astrogeo 4.10.0 #2 SMP Thu Feb 23 09:59:20 EST 2017 x86_64 x86_64 x86_64
GNU/Linux
Sincerely,
Leonid Petrov
2017.05.12_11:48:39
1) Source code code that triggers the bug:
PROGRAM GFORTRAN_710_IO_BUG
CHARACTER STR*4
INTEGER*4 I4
LOGICAL*1 FL_SHOW_BUG
!
FL_SHOW_BUG = .TRUE.
STR = CHAR(0)//CHAR(1)//CHAR(0)//CHAR(0)
IF ( FL_SHOW_BUG ) THEN
!
! -------- The place where gfortran 7.1.0 crashes
!
READ ( UNIT=STR(1:4), FMT='(A4)' ) I4
ELSE
!
! -------- Workaround
!
CALL MEMCPY ( I4, %REF(STR), %VAL(4) )
END IF
WRITE ( 6, * ) ' I4= ', I4
END PROGRAM GFORTRAN_710_IO_BUG
2) Output of the command line gfortran -v -save-temps -fno-underscoring
-ffree-form -o gfortran_710_io_bug.e gfortran_710_io_bug.f
Driving: gfortran -v -save-temps -fno-underscoring -ffree-form -o
gfortran_710_io_bug.e gfortran_710_io_bug.f -l gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/usr --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-multilib --enable-lto --without-isl
--enable-languages=c,c++,fortran,objc,obj-c++
Thread model: posix
gcc version 7.1.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-fno-underscoring' '-ffree-form' '-o'
'gfortran_710_io_bug.e' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/f951 gfortran_710_io_bug.f -quiet
-dumpbase gfortran_710_io_bug.f -mtune=generic -march=x86-64 -auxbase
gfortran_710_io_bug -version -fno-underscoring -ffree-form
-fintrinsic-modules-path /usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/finclude -o
gfortran_710_io_bug.s
GNU Fortran (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.0.0, 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
GNU Fortran2008 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.1.0, GMP version 6.0.0, 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
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-fno-underscoring' '-ffree-form' '-o'
'gfortran_710_io_bug.e' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
as -v --64 -o gfortran_710_io_bug.o gfortran_710_io_bug.s
GNU assembler version 2.24 (x86_64-redhat-linux) using BFD version version 2.24
Reading specs from
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-fno-underscoring' '-ffree-form' '-o'
'gfortran_710_io_bug.e' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
COMPILER_PATH=/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/:/usr/lib64/gcc/x86_64-pc-linux-gnu/
LIBRARY_PATH=/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/:/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-fno-underscoring' '-ffree-form' '-o'
'gfortran_710_io_bug.e' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/collect2 -plugin
/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/liblto_plugin.so
-plugin-opt=/usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/lto-wrapper
-plugin-opt=-fresolution=gfortran_710_io_bug.res
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lquadmath -plugin-opt=-pass-through=-lm
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc --eh-frame-hdr -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o gfortran_710_io_bug.e
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/crt1.o
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/crti.o
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/crtbegin.o
-L/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0
-L/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64 -L/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../..
gfortran_710_io_bug.o -lgfortran -lm -lgcc_s -lgcc -lquadmath -lm -lgcc_s -lgcc
-lc -lgcc_s -lgcc /usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/crtend.o
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-fno-underscoring' '-ffree-form' '-o'
'gfortran_710_io_bug.e' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
3) result of running affected program: ./gfortran_710_io_bug.e
At line 12 of file gfortran_710_io_bug.f
Fortran runtime error: End of record
Error termination. Backtrace:
#0 0x7f50ed383df2 in read_sf
at ../../../libgfortran/io/transfer.c:368
#1 0x7f50ed380aff in read_default_char1
at ../../../libgfortran/io/read.c:421
#2 0x7f50ed3851bc in formatted_transfer_scalar_read
at ../../../libgfortran/io/transfer.c:1584
#3 0x7f50ed38603c in formatted_transfer
at ../../../libgfortran/io/transfer.c:2263
#4 0x4009f0 in ???
#5 0x400ad2 in ???
#6 0x7f50ec6fefdf in ???
#7 0x400898 in ???
#8 0xffffffffffffffff in ???
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Fri, 12 May 2017 16:59:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-05/msg01043.ht
| |ml
--- Comment #7 from Peter Bergner <bergner at gcc dot gnu.org> ---
Patch submitted.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59729] [DR1732] C++11 allows type definitions in conditions and for-range-declarations, but shouldn't
Date: Fri, 12 May 2017 17:05:00 -0000
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
In 7.1.0 a proper error is emitted for the code in Comment 1. To be safe I'm
adding the testcase and closing the bug.
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Subject: [Bug c++/59729] [DR1732] C++11 allows type definitions in conditions and for-range-declarations, but shouldn't
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Assignee|paolo.carlini at oracle dot com |unassigned at gcc dot gnu.org
Target Milestone|--- |6.2
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Actually, we already got a proper testcase, added for c++/71604.
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
Date: Fri, 12 May 2017 17:14:00 -0000
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--- Comment #8 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Fri May 12 17:13:07 2017
New Revision: 247984
URL: https://gcc.gnu.org/viewcvs?rev=247984&root=gcc&view=rev
Log:
gcc/
PR middle-end/80707
* tree-cfg.c: Remove cfg edges of unreachable case statements.
gcc/testsuite/
PR middle-end/80707
* g++.dg/pr80707.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr80707.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
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Subject: [Bug c++/60430] static_assert and reference to const/constexpr
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--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed in 7.1.0. I'm adding the testcase and closing the bug.
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/80707] [8 Regression] r247844 causes error: extra outgoing edge
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> ---
Closing as fixed.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/80727] [7/8 Regression] Crash of runtime gfortran library during integer transformation
Date: Fri, 12 May 2017 17:54:00 -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| |5.4.0, 6.3.0
Keywords| |wrong-code
Last reconfirmed| |2017-05-12
CC| |jvdelisle at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Crash of runtime gfortran |[7/8 Regression] Crash of
|library during integer |runtime gfortran library
|transformation |during integer
| |transformation
Target Milestone|--- |7.2
Known to fail| |7.1.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Simplified test (the infamous IO of numerical values with the '(A)' format)
PROGRAM GFORTRAN_710_IO_BUG
CHARACTER STR*4
INTEGER*4 I4
str =''
i = 256
write(str,fmt='(A)') I
print *, ichar(str(1:1)), ichar(str(2:2)), ichar(str(3:3)),
ichar(str(4:4))
READ ( UNIT=STR(1:4), FMT='(A)' ) I4
WRITE ( 6, * ) ' I4= ', I4
END PROGRAM GFORTRAN_710_IO_BUG
Likely caused by r246478 (pr78881).
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Subject: [Bug c++/60430] static_assert and reference to const/constexpr
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--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Fri May 12 17:53:54 2017
New Revision: 247986
URL: https://gcc.gnu.org/viewcvs?rev=247986&root=gcc&view=rev
Log:
2017-05-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/60430
* g++.dg/cpp0x/pr60430.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr60430.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/60430] static_assert and reference to const/constexpr
Date: Fri, 12 May 2017 17:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60430
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
Date: Fri, 12 May 2017 18:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
Bug 55004 depends on bug 60430, which changed state.
Bug 60430 Summary: static_assert and reference to const/constexpr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60430
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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80382] ICE with error: unrecognizable insn
Date: Fri, 12 May 2017 18:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80382
Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Known to fail| |5.3.1, 6.1.0
--- Comment #12 from Peter Bergner <bergner at gcc dot gnu.org> ---
With a GCC 6 and GCC 5 builds I had laying around, the reduce test case ICEs
with those versions. I assume it ICEs on GCC 7 as well. Therefore, we should
back port this fix to the release branches as well.
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Subject: [Bug target/80723] [8 Regression] FAIL gcc.target/i386/cadd.c scan assembler sbb
Date: Fri, 12 May 2017 18:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80723
--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Fri May 12 18:52:51 2017
New Revision: 247991
URL: https://gcc.gnu.org/viewcvs?rev=247991&root=gcc&view=rev
Log:
PR target/80723
* config/i386/i386.c (ix86_rtx_cost) [case PLUS]: Ignore the
cost of adding a carry flag for ADC instruction.
[case MINUS]: Ignore the cost of subtracting a carry flag
for SBB instruction.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
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Subject: [Bug target/80723] [8 Regression] FAIL gcc.target/i386/cadd.c scan assembler sbb
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80728] New: IPA-reference suppresses compiler memory barrier
Date: Fri, 12 May 2017 19:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
Bug ID: 80728
Summary: IPA-reference suppresses compiler memory barrier
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: amonakov at gcc dot gnu.org
Target Milestone: ---
Consider:
static int i;
static int b;
void sighandler(void)
{
b = i = 1;
}
__attribute__((noinline))
static int x(void)
{
asm volatile("":::"memory");
return b;
}
int f(void)
{
i = 0;
return x() ? i : 0;
}
This is compiled as expected with either -Dnoinline= , or with
-fno-ipa-reference, but otherwise IPA-reference suppresses the effect of
compiler memory barrier in 'x', causing 'f' to be optimized to 'return 0'.
A similar issue exists for atomic accesses (i.e. if x contained one rather than
the volatile asm).
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Subject: [Bug testsuite/80643] NA->FAIL: gcc.dg/pr79214.c gcc.dg/pr79222.c gcc.dg/pr79223.c gcc.dg/tree-ssa/builtins-folding-gimple-ub.c
Date: Fri, 12 May 2017 19:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80643
--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri May 12 19:23:00 2017
New Revision: 247993
URL: https://gcc.gnu.org/viewcvs?rev=247993&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
PR testsuite/80643
* gfortran.dg/mvbits_7.f90: Prune diagnostic output incidental
to the purpose of the test.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/mvbits_7.f90
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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/80718] GCC generates slow code for offsettable vec_duplicate
Date: Fri, 12 May 2017 19:54:00 -0000
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 12 19:48:54 2017
New Revision: 247994
URL: https://gcc.gnu.org/viewcvs?rev=247994&root=gcc&view=rev
Log:
Rework pr 80718
Modified:
branches/ibm/meissner-work/gcc/ChangeLog.meissner
branches/ibm/meissner-work/gcc/config/rs6000/vsx.md
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80718] GCC generates slow code for offsettable vec_duplicate
Date: Fri, 12 May 2017 20:25:00 -0000
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri May 12 19:54:03 2017
New Revision: 247995
URL: https://gcc.gnu.org/viewcvs?rev=247995&root=gcc&view=rev
Log:
Rework pr 80718
Modified:
branches/ibm/meissner-work/gcc/config/rs6000/vsx.md
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From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Fri, 12 May 2017 21:21:00 -0000
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--- Comment #7 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #6)
>
> I just ran into the same ICE and the proposed patch fixes the problem.
Unfortunately the patch introduces the same ICE on another benchmark that used
to build just fine.
>From gcc-bugs-return-563393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 21:21:16 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Fri, 12 May 2017 21:59:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I have reproduced the warning in comment #0 with a powerpc64le-linux and
sparcv9-sun-solaris2.11 (but on x86_64-linux). Based on the dumps the warning
seems justified. Here's what I see in elemental_subroutine_3.f90.004t.gimple
for the second call to memcpy (the one that triggers the warning):
test ()
...
static struct mytype x[6] = {{.x=1}, {.x=20}, {.x=300}, {.x=4000},
{.x=50000}, {.x=1000000}};
...
parm.11.data = &x[3];
...
_15 = parm.11.data;
__builtin_memcpy (data.13, _15, 16);
I.e., memcpy is being called to copy 16 bytes from the six-element array x,
starting at element 4. With each element being 4 bytes wide, the last three
elements of x are only 12 bytes in size. This doesn't significantly change in
any of the subsequent dumps and the warning seems to be faithfully reporting
the same numbers: a read of 16 bytes from a region of size 12.
The reason the warning doesn't show up on x86_64 is because there GCC doesn't
emit memcpy to copy the elements. Instead it uses a MEM_REF.
>From gcc-bugs-return-563394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 21:59:10 2017
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From: "eugene.zelenko at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80729] New: [GCC 6, 7] -Wuseless-cast doesn't detect casting string literals to (const char*)
Date: Fri, 12 May 2017 22:24:00 -0000
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Bug ID: 80729
Summary: [GCC 6, 7] -Wuseless-cast doesn't detect casting
string literals to (const char*)
Product: gcc
Version: 6.3.0
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-Wuseless-cast doesn't detect casting string literals to (const char*), like
(const char*) "string"
I tried GCC 6.3 and 7.1 on C++98/03 code base.
>From gcc-bugs-return-563395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 22:25:01 2017
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Subject: [Bug c/80730] New: bogus initializer element is not computable at load time converting a string to bool
Date: Fri, 12 May 2017 22:37:00 -0000
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Bug ID: 80730
Summary: bogus initializer element is not computable at load
time converting a string to bool
Product: gcc
Version: 7.0
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GCC rejects the following initialization of a bool variable with a string
literal but accepts (albeit with a warning) an initialization of a bool
variable with an array. It seems that it should accept both since they're both
address constants.
$ cat t.c && gcc -O2 -S -Wall t.c
extern char a[];
const char *s1 = "";
const char *s2 = a;
_Bool b1 = "";
_Bool b2 = a;
t.c:6:12: error: initializer element is not computable at load time
_Bool b1 = "";
^~
t.c:7:1: warning: the address of ‘a’ will always evaluate as ‘true’ [-Waddress]
_Bool b2 = a;
^~~~~
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Subject: [Bug c/80731] New: poor -Woverflow warnings, missing detail
Date: Fri, 12 May 2017 23:07:00 -0000
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Bug ID: 80731
Summary: poor -Woverflow warnings, missing detail
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For the program below GCC emits three -Woverflow warnings, each slightly
differently worded, and each lacking in interesting or relevant detail. The
second warning is also inaccurate (the integer is truncated, but because it's
unsigned to begin with, it's unclear to what unsigned type it is converted).
$ cat t.c && gcc -O2 -S -Wall t.c
enum { X = 123456789 };
char c = X;
enum __attribute__ ((packed)) E { e3 = 3 };
enum E e = X;
void f (void)
{
switch (0)
case X * X: ;
}
t.c:3:10: warning: overflow in implicit constant conversion [-Woverflow]
char c = X;
^
t.c:7:12: warning: large integer implicitly truncated to unsigned type
[-Woverflow]
enum E e = X;
^
t.c: In function ‘f’:
t.c:12:10: warning: integer overflow in expression [-Woverflow]
case X * X: ;
^
The warnings would be more useful if they included additional detail, such as
the type and value of the expressions. For example, consider Clang output:
t.c:3:10: warning: implicit conversion from 'int' to 'char' changes value from
123456789 to 21 [-Wconstant-conversion]
char c = X;
~ ^
t.c:7:12: warning: implicit conversion from 'int' to 'enum E' changes value
from
123456789 to 21 [-Wconstant-conversion]
enum E e = X;
~ ^
t.c:12:10: warning: overflow in expression; result is -1757895751 with type
'int' [-Winteger-overflow]
case X * X: ;
^
t.c:11:11: warning: no case matching constant switch condition '0'
switch (0)
^
4 warnings generated.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Fri, 12 May 2017 23:19:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm not able to reproduce the warning mentioned in comment #1 either with a
native x86_64 compiler (-m32 or -m64), or with the cross-compilers I tried
(powerpc64le-linux and sparcv9-sun-solaris2.11).
>From gcc-bugs-return-563398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 23:19:52 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80729] [GCC 6, 7] -Wuseless-cast doesn't detect casting string literals to (const char*)
Date: Fri, 12 May 2017 23:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Not warning is correct because the type of a string literal is array of const
char while the type it's being cast to is const char*.
>From gcc-bugs-return-563399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 23:31:34 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80730] bogus initializer element is not computable at load time converting a string to bool
Date: Fri, 12 May 2017 23:33:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I think it should be understood implicitly that it's the initializer *as
converted* that must be a constant expression (and, thus, to be an address
constant, must be of pointer type). Thus "unsigned int x = -2.0;" at file
scope is invalid (while -2.0 is a constant expression, the conversion to
unsigned int would involve runtime undefined behavior, so makes it not a
constant expression). And that where part of a constant expression is an
address constant, that can only be related to an overall address constant
as an initializer in the obvious way (effectively, through operations that
add constants to it, and conditional expressions with integer constant
expression conditions). Thus address constants converted to _Bool are not
valid initializers, and nor is ("" ? "" : "") an address constant, because
of the truth-value test of the first "" making an invalid condition.
That is, this is an issue about the unclear standard wording regarding
constant expressions where I think the compiler is behaving appropriately.
A question about appropriate conditions and array indices in address
constants (whether they must be integer or just arithmetic constant
expressions) is point 7 in my old list of constant expressions issues
<https://www.polyomino.org.uk/computer/c/const-exprs-issues.txt>. _Bool
initializers with address constants and such constants controlling ?: are
on my notes of further constant expression issues (the former probably
based on
<https://groups.google.com/forum/#!original/comp.std.c/ez822gwxxYA/k1OpYXFy90wJ>
and
<https://groups.google.com/forum/#!original/comp.std.c/mIh1ej_mkrc/vbbp9UQ7zDoJ>,
the latter with the date 2007-10-24 but I'm not sure where the discussion
was).
>From gcc-bugs-return-563400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 23:33:50 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80732] New: target_clones does not work with dlsym
Date: Fri, 12 May 2017 23:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80732
Bug ID: 80732
Summary: target_clones does not work with dlsym
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: yyc1992 at gmail dot com
Target Milestone: ---
Compiling the code below to a executable with `gcc -Wall -Wextra -O3 -fPIC -ldl
-rdynamic`. On a haswell+ system, the output is
```
1:
0, 4.93038e-32, 0
2:
4.93038e-32, 4.93038e-32, 4.93038e-32
```
Showing that with the manually created ifunc, dlsym, direct function call, and
accessing function address produces the same result (the fma version) whereas
with `target_clones` only direct function call uses the fma versison.
This might be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78366 but
I'm not entirely sure. From that bug report I can understand that this is just
how `target_clones` is currently implemented but I do think this is not a
documentation issue and should be fixed / improved instead since
1. in this case there is user observable inconsistency in the result generated
when different code paths are used. The fast math object should be allowed to
produce slightly inaccurate result but I do think it should produce consistent
result every time the function is called.
2. probably more importantly, this behavior makes the `target_clone` attribute
useless for used in public interface if the shared library can ever by
dynamically loaded.
```
#include <stdio.h>
#include <dlfcn.h>
__attribute__((target_clones("default","fma"),noinline,optimize("fast-math")))
double f1(double a, double b, double c)
{
return a * b + c;
}
double k1(double a, double b, double c, void **p)
{
*p = f1;
return f1(a, b, c);
}
__attribute__((target("fma"),optimize("fast-math")))
static double f2_fma(double a, double b, double c)
{
return a * b + c;
}
__attribute__((optimize("fast-math")))
static double f2_default(double a, double b, double c)
{
return a * b + c;
}
static void *f2_resolve(void)
{
__builtin_cpu_init ();
if (__builtin_cpu_supports("fma"))
return f2_fma;
else
return f2_default;
}
double f2(double a, double b, double c) __attribute__((ifunc("f2_resolve")));
double k2(double a, double b, double c, void **p)
{
*p = f2;
return f2(a, b, c);
}
int main()
{
volatile double a = 1.0000000000000002;
volatile double b = -0.9999999999999998;
volatile double c = 1.0;
void *hdl = dlopen(NULL, RTLD_NOW);
printf("1:\n");
double (*pf1)(double, double, double) = dlsym(hdl, "f1");
double (*pk1)(double, double, double, void**) = dlsym(hdl, "k1");
double (*_pf1)(double, double, double);
double v1_1 = pf1(a, b, c);
double v1_2 = pk1(a, b, c, (void**)&_pf1);
double v1_3 = _pf1(a, b, c);
printf("%g, %g, %g\n", v1_1, v1_2, v1_3);
printf("2:\n");
double (*pf2)(double, double, double) = dlsym(hdl, "f2");
double (*pk2)(double, double, double, void**) = dlsym(hdl, "k2");
double (*_pf2)(double, double, double);
double v2_1 = pf2(a, b, c);
double v2_2 = pk2(a, b, c, (void**)&_pf2);
double v2_3 = _pf2(a, b, c);
printf("%g, %g, %g\n", v2_1, v2_2, v2_3);
return 0;
}
```
>From gcc-bugs-return-563401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 12 23:41:12 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/80730] bogus initializer element is not computable at load time converting a string to bool
Date: Sat, 13 May 2017 00:19:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
See <https://www.polyomino.org.uk/computer/c/const-exprs-c99.txt> for my
old syntactic model of constant expressions in C99. I'd consider it
appropriate to handle implicit conversions in initializers exactly the
same as casts are handled.
Essentially, I think that the intent for address constants is something
syntactic (including implicit type conversions and conversions of arrays
to pointers in the syntax) which is only approximated by the wording.
Much like e.g. C90 and C99 both messed up the definition of lvalue in
different ways and only C11 captured the essential concept of lvalues as
everyone understood them.
>From gcc-bugs-return-563402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 13 00:19:46 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/80733] New: -fstrict-enum ineffective, incorrect -Wtype-limits warning
Date: Sat, 13 May 2017 01:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80733
Bug ID: 80733
Summary: -fstrict-enum ineffective, incorrect -Wtype-limits
warning
Product: gcc
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The -fstrict-enums option's effect is documented as
Allow the compiler to optimize using the assumption that a value of
enumerated type can only be one of the values of the enumeration (as defined in
the C++ standard; basically, a value that can be represented in the minimum
number of bits needed to represent all the enumerators).
The program below shows that GCC doesn't actually perform the optimization. It
only appears to constrain the range of values of the type to that of the
underlying type, apparently disregarding the TYPE_{MIN,MAX}_VALUE set by the
C++ front end in
finish_enum_value_list in response to the option.
To add insult to injury, the -Wtype-limits warning suggests that GCC actually
does perform the optimization (the "not eliminated (bug), warning (bug)" case
below).
When compiled without -fstrict-enums, the emitted code stays the same. The
only thing that changes is that the first warning (on line 16) is not issued.
$ cat t.C && gcc -O2 -S -Wall -Wextra -Wpedantic -Wconversion -xc++
-fstrict-enums -fdump-tree-optimized=/dev/stdout t.C | grep -E "(^void
(foo|bar)|abort)"
enum E { e0, e15 = 15 };
enum __attribute__ ((packed)) F { f0, f15 = 15 };
void foo (E e)
{
if (e > 15) __builtin_abort (); // not eliminated (bug)
}
void bar (E e)
{
if (e > 255) __builtin_abort (); // not eliminated (bug)
}
void foo (F f)
{
if (f > 15) __builtin_abort (); // not eliminated (bug), warning (bug)
}
void bar (F f)
{
if (f > 255) __builtin_abort (); // eliminated, warning (good)
}
t.C: In function ‘void foo(F)’:
t.C:16:9: warning: comparison is always false due to limited range of data type
[-Wtype-limits]
if (f > 15) __builtin_abort (); // not eliminated (bug), warning (bug)
~~^~~~
t.C: In function ‘void bar(F)’:
t.C:21:9: warning: comparison is always false due to limited range of data type
[-Wtype-limits]
if (f > 255) __builtin_abort (); // eliminated, warning
~~^~~~~
void foo(E) (E e)
__builtin_abort ();
void bar(E) (E e)
__builtin_abort ();
void foo(F) (F f)
__builtin_abort ();
void bar(F) (F f)
>From gcc-bugs-return-563403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 13 01:33:22 2017
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Subject: [Bug middle-end/79794] unnecessary copy from target to target results in poor code for aarch64
Date: Sat, 13 May 2017 01:37:00 -0000
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--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
Author: wilson
Date: Sat May 13 01:32:40 2017
New Revision: 248004
URL: https://gcc.gnu.org/viewcvs?rev=248004&root=gcc&view=rev
Log:
Patch for RTL expand bug affecting aarch64 vector code.
gcc/
PR middle-end/79794
* expmed.c (extract_bit_field_1): Add alt_rtl argument. Before
maybe_expand_insn call, set ops[0].target. If still set after call,
set alt_rtl. Add extra arg to recursive calls.
(extract_bit_field): Add alt_rtl argument. Pass to
extract_bit_field.
* expmed.h (extract_bit_field): Fix prototype.
* expr.c (emit_group_load_1, copy_blkmode_from_reg)
(copy_blkmode_to_reg, read_complex_part, store_field): Pass extra NULL
to extract_bit_field_calls.
(expand_expr_real_1): Pass alt_rtl to expand_expr_real instead of 0.
Pass alt_rtl to extract_bit_field calls.
* calls.c (store_unaligned_arguments_into_psuedos)
load_register_parameters): Pass extra NULL to extract_bit_field calls.
* optabs.c (maybe_legitimize_operand): Clear op->target when call
gen_reg_rtx.
* optabs.h (struct expand_operand): Add target bitfield.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/expmed.c
trunk/gcc/expmed.h
trunk/gcc/expr.c
trunk/gcc/optabs.c
trunk/gcc/optabs.h
>From gcc-bugs-return-563404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 13 01:37:03 2017
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Subject: [Bug middle-end/79794] unnecessary copy from target to target results in poor code for aarch64
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--- Comment #3 from Jim Wilson <wilson at gcc dot gnu.org> ---
Needs a testcase for the testsuite.
>From gcc-bugs-return-563405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 13 01:41:02 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 c/80730] bogus initializer element is not computable at load time converting a string to bool
Date: Sat, 13 May 2017 04:06:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I don't see what purpose rejecting
bool b = "";
serves when
bool b = !!"";
or even
bool b = "" ? 1 : 0;
are accepted.
Even if it isn't 100% crystal clear, the standard encourages implementations to
be permissive and treat additional expressions as constant, beyond the bare
minimum it strictly requires. It may be of value to issue pedantic warnings
for code that relies on more than the required minimum, but summarily rejecting
it based on a minimalist reading is unfriendly, especially when more involved
(and less intuitive) equivalent alternatives are accepted. All that achieves
is that it penalizes users who write clean code, forcing them to come up with
clunky workarounds.
>From gcc-bugs-return-563406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 13 04:06:31 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80734
Bug ID: 80734
Summary: GCC 6.3.1 errors compiling GCC 4.8.5 - error: ‘const
char* libc_name_p(const char*, unsigned int)’
redeclared inline with ‘gnu_inline’ attribute
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: eric.parker at inventati dot org
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In file included from ../.././gcc/cp/except.c:1008:0:
cfns.gperf: In function ‘const char* libc_name_p(const char*, unsigned int)’:
cfns.gperf:101:1: error: ‘const char* libc_name_p(const char*, unsigned int)’
redeclared inline with ‘gnu_inline’ attribute
cfns.gperf:26:14: note: ‘const char* libc_name_p(const char*, unsigned int)’
previously declared here
cfns.gperf: At global scope:
cfns.gperf:26:14: warning: inline function ‘const char* libc_name_p(const
char*, unsigned int)’ used but never defined
GCC version: 6.3.1
System: Fedora 25
GCC configuration: ./configure --prefix=`pwd`../build
GCC build command: make -j `nproc`
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From: "daniel.santos at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80735] New: IPA: SRA inhibits constant propagation of structs across multiple function calls
Date: Sat, 13 May 2017 06:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80735
Bug ID: 80735
Summary: IPA: SRA inhibits constant propagation of structs
across multiple function calls
Product: gcc
Version: 7.1.0
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Created attachment 41350
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41350&action=edit
test_case.c
I've finally managed a simple test case for this long-standing missed
optimization. Given the test code built with -O2 -fno-inline:
static const struct foo {
long a;
long b;
} f = {8, 8};
static long a (const struct foo *foo) {return foo->b;}
static long b (const struct foo *foo) {return a (foo);}
long c (void) {return b (&f);}
Result:
0000000000000000 <a.isra.0>:
0: 48 89 f8 mov %rdi,%rax
3: c3 retq
0000000000000010 <b.constprop.1>:
10: bf 08 00 00 00 mov $0x8,%edi
15: eb e9 jmp 0 <a.isra.0>
0000000000000020 <c>:
20: eb ee jmp 10 <b.constprop.1>
Although we got isra for foo::b, I had expected a() to consist of only mov
$0x8, %eax; retq, and b() just be a jump to a(). But when we disable ipa-sra
we get the expected result (-O2 -fno-inline -fno-ipa-sra):
0000000000000000 <a.constprop.1>:
0: b8 08 00 00 00 mov $0x8,%eax
5: c3 retq
0000000000000010 <b.constprop.0>:
10: eb ee jmp 0 <a.constprop.1>
0000000000000020 <c>:
20: eb ee jmp 10 <b.constprop.0>
If we replace the struct with an array or a pointer to a long then SRA does not
interfere with the constant propagation (-O2 -fno-inline):
static const long f[2] = {8, 8};
static long a (const long foo[]) {return foo[1];}
static long b (const long foo[]) {return a (foo);}
long c (void) {return b (f);}
Result
0000000000000000 <a.constprop.1>:
0: b8 08 00 00 00 mov $0x8,%eax
5: c3 retq
0000000000000010 <b.constprop.0>:
10: eb ee jmp 0 <a.constprop.1>
0000000000000020 <c>:
20: eb ee jmp 10 <b.constprop.0>
I'm still very new to this part of GCC, but I'm guessing that when we do the
SRA, we toss out the original aggregate. If so, then we aren't reserving the
possibility that all of the function's callers could get cloned with a constant
for the aggregate, which would (probably always?) be better than just plucking
the scaler out of the aggregate. I'll be digesting tree.sra.c and the cgraph
to try and figure this one out, but if anybody understands this better then I
would appreciate some hints. :)
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Subject: =?UTF-8?B?W0J1ZyBjLzgwNzM0XSBHQ0MgNi4zLjEgZXJyb3JzIGNvbXBpbGluZyBHQ0Mg?= =?UTF-8?B?NC44LjUgLSBlcnJvcjog4oCYY29uc3QgY2hhciogbGliY19uYW1lX3AoY29u?= =?UTF-8?B?c3QgY2hhciosIHVuc2lnbmVkIGludCnigJkgcmVkZWNsYXJlZCBpbmxpbmUg?= =?UTF-8?B?d2l0aCDigJhnbnVfaW5saW5l4oCZIGF0dHJpYnV0ZQ==?Date: Sat, 13 May 2017 07:26:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The bug is on the GCC 4.8 side, so either you need to patch it, or build with
-std=gnu++98 - then __GNUC_STDC_INLINE__ will not be defined and it ought to
compile fine.
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--- Comment #2 from Eric Parker <eric.parker at inventati dot org> ---
Okay, that works for me. Thanks Jakub.
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From: "mikpelinux at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/79920] [6 Regression] Incorrect floating point results when compiling with -O3
Date: Sat, 13 May 2017 09:19:00 -0000
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Mikael Pettersson <mikpelinux at gmail dot com> changed:
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--- Comment #6 from Mikael Pettersson <mikpelinux at gmail dot com> ---
(In reply to Andrey Guskov from comment #5)
> The revision 245968 breaks compilation of 465.tonto from SPEC2006 with these
> options:
>
> -m32 -Ofast -flto -march=core-avx2
Was this regression fixed, and if so by which revision? I don't have immediate
access to SPEC2006 so I cannot check for myself.
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Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
Date: Sat, 13 May 2017 09:21:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change in behavior is likely due to revision r238904 (pr71730).
Note that compiling the first test in comment 0 with -std=f95 before this
revision gives
% /opt/gcc/gcc7p-238848p2/bin/gfortran pr80666.f90 -std=f95
pr80666.f90:3:13:
character*(keylen), intent(in) :: key
1
Error: GNU Extension: Symbol 'keylen' is used before it is typed at (1)
pr80666.f90:1:29:
subroutine test_arg_order(key,keylen)
1
Error: Symbol 'key' at (1) has no IMPLICIT type
> Just try to write standard conforming code if possible.
Seconded (this is a very easy case), since the revision r238904 fixes an ICE at
the expense of a GNU extension, I don't think it is worth putting any effort to
restore the extension -> closing this PR as WONTFIX.
> On the other hand, the main misunderstanding here I think is what defines
> the order of the definition of subroutine parameters. Is it the parameter
> list in the subroutine statement or is it the individual type declarations
> that follow it? It seems most logical in my eyes if the parameter list
> is the one that defines order of parameter definitions but I might be wrong.
> Is this defined in the fortran specification at all?
(1) PARAMETER has a very precise definition in Fortran and AFAICT this
definition (named constants) does not match your use in the above quotation.
Are you meaning dummy arguments?
(2) If yes, there is no correlation between the order the dummy arguments and
the individual type declarations. The order of type declarations is only a
matter of coding style, provided they follow the rule "define before using".
Final note: while looking at the DATA statement, I stumbled on the following
5.6.7 DATA statement
...
3 A variable that appears in a DATA statement and has not been typed
previously may appear in a subsequent type declaration only if that
declaration confirms the implicit typing. An array name, array section,
or array element that appears in a DATA statement shall have had its array
properties established by a previous specification statement.
Thus the rule "define before using" has at least one exception.
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Subject: [Bug c++/80736] New: Wrong overload picked with uniform initialization
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Bug ID: 80736
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The following program leads to an infinite recursion:
#include <initializer_list>
template< typename T >
struct vector
{
vector() = default;
vector( const vector& ) = default; // 1
vector( std::initializer_list< T > ) {} // 2
};
template< typename T >
struct model
{
T data;
model( const T& v )
// : data( v ) // chooses 1
: data{ v } // chooses 2 over 1, creating an infinite recursion
{
}
};
struct drawable
{
template< typename T >
drawable( const T& v )
{
model< T >{ v };
}
};
int main()
{
vector< drawable > v;
drawable d = v;
(void)d;
}
The problem is that the ctor with the initializer_list is preferred over the
copy-ctor. This should be fixed by DR 1467 (AFAICT), but GCC still gets it
wrong in the above program.
Tested with GCC 4.9.3, 5.4, 6.3, and 7.1.
Clang 3.7+ gets it right, previous versions of Clang have the same problem as
GCC.
Link: https://wandbox.org/permlink/MiS6pzVbGOO8Hxaw
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Sat, 13 May 2017 10:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80222
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
CC| |ebotcazou at gcc dot gnu.org
Resolution|FIXED |---
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Backporting onto the 6 branch introduced regressions:
https://gcc.gnu.org/ml/gcc-patches/2017-05/msg01087.html
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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/80597] [8 Regression] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Sat, 13 May 2017 12:38:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #7)
> (In reply to Pat Haugen from comment #6)
> >
> > I just ran into the same ICE and the proposed patch fixes the problem.
>
> Unfortunately the patch introduces the same ICE on another benchmark that
> used to build just fine.
Can you please provide a test-case? Or can you dump the sreal values via
.to_double() ? That can be also hint for us to fix that properly.
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Subject: [Bug libstdc++/80737] New: variant<any> as class member resulting to compile errors
Date: Sat, 13 May 2017 13:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80737
Bug ID: 80737
Summary: variant<any> as class member resulting to compile
errors
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: z-1st at mail dot ru
Target Milestone: ---
variant<any> works as expected outside the class. But if it is declared as a
class member it doesn't compile in some cases
The following example doesn't compile
struct MyClass
{
variant<any> var;
};
int main()
{
MyClass s; //fail
return 0;
}
However, the following compiles
MyClass s{}; //works
MyClass s{1};//works
Also, it is not possible to write custom constructors arount it.
Example output:
https://godbolt.org/g/NNQR09
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Subject: [Bug fortran/80722] gfortran can not compile omp clause with default(none) when there is a type bind method
Date: Sat, 13 May 2017 13:24:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-13
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from gfortran 5.4.0 up to trunk (8.0).
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Subject: [Bug fortran/80674] trunk/gcc/fortran/trans-stmt.c:2578]: (style) Redundant condition
Date: Sat, 13 May 2017 18:58:00 -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> ---
True for all the open branches (5 to 8).
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Subject: [Bug libstdc++/80737] variant<any> as class member resulting to compile errors
Date: Sat, 13 May 2017 19:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80737
TC <rs2740 at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |rs2740 at gmail dot com
--- Comment #1 from TC <rs2740 at gmail dot com> ---
#include <variant>
#include <any>
std::variant<std::any> a, b(a);
In file included from main.cpp:1:0:
/usr/local/include/c++/7.1.0/variant: In instantiation of 'struct
std::__detail::__variant::__accepted_index<std::variant<std::any>&,
std::variant<std::any>, void>':
/usr/local/include/c++/7.1.0/variant:911:26: required from 'constexpr const
size_t std::variant<std::any>::__accepted_index<std::variant<std::any>&>'
/usr/local/include/c++/7.1.0/variant:940:6: required by substitution of
'template<class _Tp, class> constexpr std::variant<std::any>::variant(_Tp&&)
[with _Tp = std::variant<std::any>&; <template-parameter-1-2> = <missing>]'
main.cpp:4:30: required from here
/usr/local/include/c++/7.1.0/variant:559:49: error: no matching function for
call to
'std::__detail::__variant::__overload_set<std::any>::_S_fun(std::variant<std::any>&)'
decltype(__overload_set<_Types...>::_S_fun(std::declval<_Tp>()),
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: candidate: static
std::integral_constant<long unsigned int, sizeof... (_Rest)>
std::__detail::__variant::__overload_set<_First, _Rest ...>::_S_fun(_First)
[with _First = std::any; _Rest = {}]
static integral_constant<size_t, sizeof...(_Rest)> _S_fun(_First);
^~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: no known conversion for
argument 1 from 'std::variant<std::any>' to 'std::any'
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate: static void
std::__detail::__variant::__overload_set<_Types>::_S_fun() [with _Types = {}]
{ static void _S_fun(); };
^~~~~~
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate expects 0
arguments, 1 provided
/usr/local/include/c++/7.1.0/variant:559:49: error: no matching function for
call to
'std::__detail::__variant::__overload_set<std::any>::_S_fun(std::variant<std::any>&)'
decltype(__overload_set<_Types...>::_S_fun(std::declval<_Tp>()),
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: candidate: static
std::integral_constant<long unsigned int, sizeof... (_Rest)>
std::__detail::__variant::__overload_set<_First, _Rest ...>::_S_fun(_First)
[with _First = std::any; _Rest = {}]
static integral_constant<size_t, sizeof...(_Rest)> _S_fun(_First);
^~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: no known conversion for
argument 1 from 'std::variant<std::any>' to 'std::any'
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate: static void
std::__detail::__variant::__overload_set<_Types>::_S_fun() [with _Types = {}]
{ static void _S_fun(); };
^~~~~~
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate expects 0
arguments, 1 provided
/usr/local/include/c++/7.1.0/variant:559:49: error: no matching function for
call to
'std::__detail::__variant::__overload_set<std::any>::_S_fun(std::variant<std::any>&)'
decltype(__overload_set<_Types...>::_S_fun(std::declval<_Tp>()),
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: candidate: static
std::integral_constant<long unsigned int, sizeof... (_Rest)>
std::__detail::__variant::__overload_set<_First, _Rest ...>::_S_fun(_First)
[with _First = std::any; _Rest = {}]
static integral_constant<size_t, sizeof...(_Rest)> _S_fun(_First);
^~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: no known conversion for
argument 1 from 'std::variant<std::any>' to 'std::any'
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate: static void
std::__detail::__variant::__overload_set<_Types>::_S_fun() [with _Types = {}]
{ static void _S_fun(); };
^~~~~~
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate expects 0
arguments, 1 provided
/usr/local/include/c++/7.1.0/variant: In instantiation of 'constexpr const
size_t std::__detail::__variant::__accepted_index<std::variant<std::any>&,
std::variant<std::any>, void>::value':
/usr/local/include/c++/7.1.0/variant:911:26: required from 'constexpr const
size_t std::variant<std::any>::__accepted_index<std::variant<std::any>&>'
/usr/local/include/c++/7.1.0/variant:940:6: required by substitution of
'template<class _Tp, class> constexpr std::variant<std::any>::variant(_Tp&&)
[with _Tp = std::variant<std::any>&; <template-parameter-1-2> = <missing>]'
main.cpp:4:30: required from here
/usr/local/include/c++/7.1.0/variant:564:12: error: no matching function for
call to
'std::__detail::__variant::__overload_set<std::any>::_S_fun(std::variant<std::any>&)'
- decltype(__overload_set<_Types...>::
~~~~~~~~~~~~~~~~~~~~~~~~~~~
_S_fun(std::declval<_Tp>()))::value;
~~~~~~^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: candidate: static
std::integral_constant<long unsigned int, sizeof... (_Rest)>
std::__detail::__variant::__overload_set<_First, _Rest ...>::_S_fun(_First)
[with _First = std::any; _Rest = {}]
static integral_constant<size_t, sizeof...(_Rest)> _S_fun(_First);
^~~~~~
/usr/local/include/c++/7.1.0/variant:541:58: note: no known conversion for
argument 1 from 'std::variant<std::any>' to 'std::any'
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate: static void
std::__detail::__variant::__overload_set<_Types>::_S_fun() [with _Types = {}]
{ static void _S_fun(); };
^~~~~~
/usr/local/include/c++/7.1.0/variant:535:19: note: candidate expects 0
arguments, 1 provided
Looks like the constraint on the convert-everything constructor needs to check
for is_same<decay_t<_Tp>, variant> first and short circuit if that's true.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80737] variant<any> as class member resulting to compile errors
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Tim Shen <timshen at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |timshen at gcc dot gnu.org
--- Comment #2 from Tim Shen <timshen at gcc dot gnu.org> ---
I reduced the test case a bit, noticing that a seemingly trivial change to
<any> makes it compile. Here it is: https://godbolt.org/g/tQowts
Defining the macro BUG reproduces the compile failure, however the code in BUG
should have the same meaning as the other branch - it merely uses a type alias.
FWIW clang 5.0.0 compiles the pre-processed code with/without -DBUG.
I believe that it's a GCC frontend issue.
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Subject: [Bug libstdc++/80737] variant<any> as class member resulting to compile errors
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--- Comment #3 from Tim Shen <timshen at gcc dot gnu.org> ---
(In reply to TC from comment #1)
> Looks like the constraint on the convert-everything constructor needs to
> check for is_same<decay_t<_Tp>, variant> first and short circuit if that's
> true.
I'm not quite sure whether we need that short circuit - it's in a SFINAE
environment, so if anything goes wrong, there shouldn't be a hard error.
Therefore even if I agree that we should check is_same<decay_t<_Tp>, variant>
first, that shouldn't affect the correctness.
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Subject: [Bug c++/80737] variant<any> as class member resulting to compile errors
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--- Comment #4 from Tim Shen <timshen at gcc dot gnu.org> ---
(In reply to Tim Shen from comment #3)
> (In reply to TC from comment #1)
> > Looks like the constraint on the convert-everything constructor needs to
> > check for is_same<decay_t<_Tp>, variant> first and short circuit if that's
> > true.
>
> I'm not quite sure whether we need that short circuit - it's in a SFINAE
> environment, so if anything goes wrong, there shouldn't be a hard error.
> Therefore even if I agree that we should check is_same<decay_t<_Tp>,
> variant> first, that shouldn't affect the correctness.
s/even if/even though/.
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Subject: [Bug ada/80590] [8 regression] non-bootstrap build failure of Ada runtime
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-13
CC| |ebotcazou at gcc dot gnu.org
Version|7.0 |8.0
Target Milestone|--- |8.0
Summary|[ada] non-bootstrap build |[8 regression]
|failure in ada -- Error |non-bootstrap build failure
|reporting routines |of Ada runtime
|re-entered |
Ever confirmed|0 |1
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Subject: [Bug fortran/80442] Rejects DATA statement with array slice
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--- Comment #2 from Nicolas Koenig <koenigni at gcc dot gnu.org> ---
Author: koenigni
Date: Sat May 13 23:38:36 2017
New Revision: 248012
URL: https://gcc.gnu.org/viewcvs?rev=248012&root=gcc&view=rev
Log:
2017-05-09 Nicolas Koenig <koenigni@student.ethz.ch>
PR fortran/80442
* array.c (gfc_ref_dimen_size): Simplify stride
expression
* data.c (gfc_advance_section): Simplify start,
end and stride expressions
(gfc_advance_section): Simplify start and end
expressions
(gfc_get_section_index): Simplify start expression
2017-05-09 Nicolas Koenig <koenigni@student.ethz.ch>
PR fortran/80442
* gfortran.dg/impl_do_var_data.f90: New Test
Added:
trunk/gcc/testsuite/gfortran.dg/impl_do_var_data.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/data.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
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--- Comment #4 from jim at meyering dot net ---
Created attachment 41351
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41351&action=edit
process.i.xz
Thanks for the quick work.
Here's the original process.i file.
Had to compress it, because it was just larger than the 1000kb maximum.
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Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
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--- Comment #5 from jim at meyering dot net ---
FYI, for a little more context around how I found it, here's the thread on
emacs-devel:
https://lists.gnu.org/archive/html/emacs-devel/2017-05/msg00182.html
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Subject: [Bug c++/80736] Wrong overload picked with uniform initialization
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TC <rs2740 at gmail dot com> changed:
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CC| |rs2740 at gmail dot com
--- Comment #1 from TC <rs2740 at gmail dot com> ---
This is correct behavior after DR 2137 backed out the relevant portions of DR
1467.
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Subject: [Bug c++/80736] Wrong overload picked with uniform initialization
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Daniel Frey <d.frey at gmx dot de> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Daniel Frey <d.frey at gmx dot de> ---
I wasn't aware of DR 2137 and after reading it, I understand the reasoning.
Thanks.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80442
Nicolas Koenig <koenigni at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Nicolas Koenig <koenigni at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-563429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 14 12:03:56 2017
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80738] New: dead first stmt in a=0;a=b;b=0 whatever the aliasing
Date: Sun, 14 May 2017 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80738
Bug ID: 80738
Summary: dead first stmt in a=0;a=b;b=0 whatever the aliasing
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: alias, missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: glisse at gcc dot gnu.org
Target Milestone: ---
In C++, with move/swap, we regularly see the following appear
void f(int&a,int&b){
a=0;
a=b;
b=0;
}
If a and b do not alias, the first statement is clearly killed by the second.
If a and b are the same, the last statement kills all the rest. So in all
cases, the first statement is dead. (we could imagine that removing it means
that in some cases, we will copy uninitialized memory to itself, but that
doesn't seem so bad)
This is yet another case where the same optimization is valid whether 2
pointers alias or not, like PR 66261 or PR 80617, but the others were more
about propagation and this one is about dead code...
It seems hard to detect (involves 4 gimple statements, and plenty of
intermediate statements could interfere), the gain may not be worth it. If we
split the paths just right: if(&a!=&b){a=0;a=b;}else{a=0;a=b;}b=0; becomes
if(&a!=&b)a=b; b=0; and the if could be done unconditionally... Seems unlikely.
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80706
--- Comment #16 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun May 14 12:49:55 2017
New Revision: 248032
URL: https://gcc.gnu.org/viewcvs?rev=248032&root=gcc&view=rev
Log:
Backport from mainline
2017-05-11 Uros Bizjak <ubizjak@gmail.com>
PR target/80706
* config/i386/sync.md (UNSPEC_LDX_ATOMIC): New unspec.
(UNSPEC_STX_ATOMIC): Ditto.
(loaddi_via_sse): New insn.
(storedi_via_sse): Ditto.
(atomic_loaddi_fpu): Emit loaddi_via_sse and storedi_via_sse.
Update corresponding peephole2 patterns.
(atomic_storedi_fpu): Ditto.
testsuite/ChangeLog:
Backport from mainline
2017-05-11 Uros Bizjak <ubizjak@gmail.com>
Jakub Jelinek <jakub@redhat.com>
PR target/80706
* gcc.target/i386/pr80706.c: New test.
2017-05-11 Uros Bizjak <ubizjak@gmail.com>
* gcc.target/i386/pr22152.c: Fix undefined testcase.
Remove unnecessary loop. Run on 32-bit targets only.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr80706.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/sync.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr22152.c
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From: "vince.rev at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80739] New: Accessing value of X through a Y glvalue in a constant expression
Date: Sun, 14 May 2017 13:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80739
Bug ID: 80739
Summary: Accessing value of X through a Y glvalue in a constant
expression
Product: gcc
Version: 6.2.0
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Priority: P3
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Created attachment 41352
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41352&action=edit
Example of the bug
Consider the following valid code in C++14 (compiles without problem under
clang):
// ==========================================================================
//
#include <iostream>
template <class T> struct element {
constexpr element() noexcept: x0(0), x1(0), x2(0), x3(0) {}
T x0; int x1, x2, x3;
};
template <class T> struct container {
constexpr container() noexcept: data() {data = element<T>();}
element<T> data;
};
template <class T> constexpr bool test() {
return (container<T>(), true);
}
int main() {
constexpr bool tmp0 = test<int>(); // works
constexpr bool tmp1 = test<std::size_t>(); // fails
return tmp0 && tmp1;
}
// ==========================================================================
//
Compilation fails under g++-5 (g++-5 (Ubuntu 5.4.1-2ubuntu1~16.04) 5.4.1
20160904) with the following message:
## --------------------------------------------------------------------------
##
gcc_compiler_error.cpp: In function ‘int main()’:
gcc_compiler_error.cpp:16:44: in constexpr expansion of ‘test<long unsigned
int>()’
gcc_compiler_error.cpp:16:45: in constexpr expansion of ‘container<long
unsigned int>()’
gcc_compiler_error.cpp:16:45: internal compiler error: unexpected expression
‘*(container<long unsigned int>*)this’ of kind mem_ref
constexpr bool tmp1 = test<std::size_t>(); // fails
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
## --------------------------------------------------------------------------
##
Compilation fails under g++-6 (g++-6 (Ubuntu 6.2.0-3ubuntu11~16.04) 6.2.0
20160901) with the following message:
## --------------------------------------------------------------------------
##
gcc_compiler_error.cpp: In function ‘int main()’:
gcc_compiler_error.cpp:16:44: in constexpr expansion of ‘test<long unsigned
int>()’
gcc_compiler_error.cpp:16:45: in constexpr expansion of ‘container<long
unsigned int>()’
gcc_compiler_error.cpp:16:45: error: accessing value of ‘<anonymous>’ through a
‘char [20]’ glvalue in a constant expression
constexpr bool tmp1 = test<std::size_t>(); // fails
^
## --------------------------------------------------------------------------
##
Other versions may be affected (not tested).
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Subject: [Bug tree-optimization/80740] New: Aliasing with the return value
Date: Sun, 14 May 2017 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80740
Bug ID: 80740
Summary: Aliasing with the return value
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: alias, missed-optimization
Severity: normal
Priority: P3
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struct A {
int i;
A():i(0){}
A(A const&a):i(a.i){}
};
A f(A&a){
A ret;
ret.i=a.i;
return ret;
}
We do not manage to remove the 0 initialization because of a possible aliasing
between ret and a
ret_3(D)->i = 0;
_1 = a_4(D)->i;
ret_3(D)->i = _1;
return ret_3(D);
Clang does remove it.
Aliasing would be something like
int g(){
A x=f(x);
return x.i;
}
which we optimize to return 0; and clang optimizes it to just return; without a
warning, although their static analysis tool says
/tmp/x.cc:9:8: warning: Assigned value is garbage or undefined
ret.i=a.i;
^~~~
Clang has the opposite bug report, saying that they are wrong to optimize
because g is valid, but they seem to consider that the bug is in the standard
for not forbidding it more clearly...
https://bugs.llvm.org/show_bug.cgi?id=11470
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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/65696] ASAN reports global-buffer-overrun for local tagged types
Date: Sun, 14 May 2017 14:47:00 -0000
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--- Comment #2 from yuta tomino <demoonlit at panathenaia dot halfmoon.jp> ---
Here is a proposing fix.
I has tried this patch with gcc from 4.8 to 7, and it seems to work fine with
all versions.
diff --git a/gcc/ada/exp_atag.adb b/gcc/ada/exp_atag.adb
index 587432c..4313446 100644
--- a/gcc/ada/exp_atag.adb
+++ b/gcc/ada/exp_atag.adb
@@ -744,7 +744,8 @@ package body Exp_Atag is
function Build_Inherit_Predefined_Prims
(Loc : Source_Ptr;
Old_Tag_Node : Node_Id;
- New_Tag_Node : Node_Id) return Node_Id
+ New_Tag_Node : Node_Id;
+ Num_Predef_Prims : Int) return Node_Id
is
begin
return
@@ -759,7 +760,7 @@ package body Exp_Atag is
New_Tag_Node)))),
Discrete_Range => Make_Range (Loc,
Make_Integer_Literal (Loc, Uint_1),
- New_Occurrence_Of (RTE (RE_Max_Predef_Prims), Loc))),
+ Make_Integer_Literal (Loc, Num_Predef_Prims))),
Expression =>
Make_Slice (Loc,
@@ -772,7 +773,7 @@ package body Exp_Atag is
Discrete_Range =>
Make_Range (Loc,
Make_Integer_Literal (Loc, 1),
- New_Occurrence_Of (RTE (RE_Max_Predef_Prims), Loc))));
+ Make_Integer_Literal (Loc, Num_Predef_Prims))));
end Build_Inherit_Predefined_Prims;
-------------------------
diff --git a/gcc/ada/exp_atag.ads b/gcc/ada/exp_atag.ads
index d53466f..eb4be55 100644
--- a/gcc/ada/exp_atag.ads
+++ b/gcc/ada/exp_atag.ads
@@ -111,7 +111,8 @@ package Exp_Atag is
function Build_Inherit_Predefined_Prims
(Loc : Source_Ptr;
Old_Tag_Node : Node_Id;
- New_Tag_Node : Node_Id) return Node_Id;
+ New_Tag_Node : Node_Id;
+ Num_Predef_Prims : Int) return Node_Id;
-- Build code that inherits the predefined primitives of the parent.
--
-- Generates: Predefined_DT (New_T).D (All_Predefined_Prims) :=
diff --git a/gcc/ada/exp_disp.adb b/gcc/ada/exp_disp.adb
index 2b63377..ef7440f 100644
--- a/gcc/ada/exp_disp.adb
+++ b/gcc/ada/exp_disp.adb
@@ -4524,6 +4524,7 @@ package body Exp_Disp is
Iface_Table_Node : Node_Id;
Name_ITable : Name_Id;
Nb_Predef_Prims : Nat := 0;
+ Cp_Predef_Prims : Nat := 0;
Nb_Prim : Nat := 0;
New_Node : Node_Id;
Num_Ifaces : Nat := 0;
@@ -5690,10 +5691,6 @@ package body Exp_Disp is
Pos : Nat;
begin
- if not Building_Static_DT (Typ) then
- Nb_Predef_Prims := Max_Predef_Prims;
-
- else
Prim_Elmt := First_Elmt (Primitive_Operations (Typ));
while Present (Prim_Elmt) loop
Prim := Node (Prim_Elmt);
@@ -5703,13 +5700,18 @@ package body Exp_Disp is
then
Pos := UI_To_Int (DT_Position (Prim));
- if Pos > Nb_Predef_Prims then
- Nb_Predef_Prims := Pos;
+ if Pos > Cp_Predef_Prims then
+ Cp_Predef_Prims := Pos;
end if;
end if;
Next_Elmt (Prim_Elmt);
end loop;
+
+ if not Building_Static_DT (Typ) then
+ Nb_Predef_Prims := Max_Predef_Prims;
+ else
+ Nb_Predef_Prims := Cp_Predef_Prims;
end if;
declare
@@ -6054,7 +6056,8 @@ package body Exp_Disp is
(Node
(Next_Elmt
(First_Elmt
- (Access_Disp_Table (Typ)))), Loc)));
+ (Access_Disp_Table (Typ)))), Loc),
+ Num_Predef_Prims => Cp_Predef_Prims));
if Nb_Prims /= 0 then
Append_To (Elab_Code,
@@ -6143,7 +6146,8 @@ package body Exp_Disp is
Unchecked_Convert_To (RTE (RE_Tag),
New_Occurrence_Of
(Node (Next_Elmt (Sec_DT_Typ)),
- Loc))));
+ Loc)),
+ Num_Predef_Prims => Cp_Predef_Prims));
if Num_Prims /= 0 then
Append_To (Elab_Code,
@@ -6189,7 +6193,8 @@ package body Exp_Disp is
Unchecked_Convert_To (RTE (RE_Tag),
New_Occurrence_Of
(Node (Next_Elmt (Sec_DT_Typ)),
- Loc))));
+ Loc)),
+ Num_Predef_Prims => Cp_Predef_Prims));
if Num_Prims /= 0 then
Append_To (Elab_Code,
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Subject: [Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #17 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Right or wrong I think the concern was order of execution. Is it guaranteed for
'!A || B'? Is it guaranteed that B will not be executed if !A is true?
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Subject: [Bug fortran/80741] New: incorrect behaviour of rewind with namelist
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Bug ID: 80741
Summary: incorrect behaviour of rewind with namelist
Product: gcc
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Created attachment 41353
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41353&action=edit
test case
Rewind does not appear to work correctly if end of file has been reached and
the file contains a namelist.
With the attached file I get with gfortran 7.1.0:
&TEST
X= 10,
Y= 10,
/
done
eof
&TEST
X= 0,
Y= 0,
/
X=
gfortran 6.3.0 I get the behaviour I expect (namelist set on both passes and
after reading the namelist, the next record is the line after the namelist):
&TEST
X= 10,
Y= 10,
/
done
eof
&TEST
X= 10,
Y= 10,
/
done
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Subject: [Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r248034.
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Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #4)
> The change in behavior is likely due to revision r238904 (pr71730).
>
> Note that compiling the first test in comment 0 with -std=f95 before this
> revision gives
>
> % /opt/gcc/gcc7p-238848p2/bin/gfortran pr80666.f90 -std=f95
> pr80666.f90:3:13:
>
> character*(keylen), intent(in) :: key
> 1
> Error: GNU Extension: Symbol 'keylen' is used before it is typed at (1)
> pr80666.f90:1:29:
>
> subroutine test_arg_order(key,keylen)
> 1
> Error: Symbol 'key' at (1) has no IMPLICIT type
>
> > Just try to write standard conforming code if possible.
>
I wonder if the code that gave this earlier Gnu Extension error is now dead
code. The patch catches the ICE. -std=f95 still gives the GNU Extension error
which obviously is no longer an extension. Maybe this needs some adjustment,
but not critical. At a minimum, cleanup diagnostic.
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Subject: [Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy
Date: Sun, 14 May 2017 16:07:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sun May 14 16:06:41 2017
New Revision: 248034
URL: https://gcc.gnu.org/viewcvs?rev=248034&root=gcc&view=rev
Log:
PR middle-end/80669 - Bad -Wstringop-overflow warnings for stpncpy
gcc/ChangeLog:
PR middle-end/80669
* builtins.c (expand_builtin_stpncpy): Simplify.
gcc/testsuite/ChangeLog:
PR middle-end/80669
* gcc.dg/builtin-stpncpy.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/builtin-stpncpy.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/80674] trunk/gcc/fortran/trans-stmt.c:2578]: (style) Redundant condition
Date: Sun, 14 May 2017 16:13:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Jerry DeLisle from comment #2)
> Is it guaranteed for '!A || B'? Is it guaranteed that B will
> not be executed if !A is true?
Yes. See C FAQ.
http://c-faq.com/expr/shortcircuit.html
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From: "andi-gcc at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80742] New: attribute target no- does not work
Date: Sun, 14 May 2017 16:27:00 -0000
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Bug ID: 80742
Summary: attribute target no- does not work
Product: gcc
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Disabling ISAs with attribute target doesn't seem to work on x86_64
e.g.
typedef float __m128 __attribute__ ((vector_size (16)));
__attribute__((target("no-sse2"))) __m128 func (__m128 x, __m128 y)
{
__m128 xmm0 = x, xmm1 = y, xmm2;
xmm0 = __builtin_ia32_xorps (xmm1, xmm1);
return xmm0;
}
does not error out.
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Subject: [Bug libfortran/80727] [7/8 Regression] Crash of runtime gfortran library during integer transformation
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Mine, studying it.
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Subject: [Bug middle-end/77671] missing -Wformat-overflow warning on sprintf overflow with "%s"
Date: Sun, 14 May 2017 17:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77671
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sun May 14 17:50:28 2017
New Revision: 248035
URL: https://gcc.gnu.org/viewcvs?rev=248035&root=gcc&view=rev
Log:
PR middle-end/77671 - missing -Wformat-overflow warning on sprintf overflow
with %s
gcc/ChangeLog:
PR middle-end/77671
* gimple-fold.c (gimple_fold_builtin_sprintf): Make extern.
(gimple_fold_builtin_snprintf): Same.
* gimple-fold.h (gimple_fold_builtin_sprintf): Declare.
(gimple_fold_builtin_snprintf): Same.
* gimple-ssa-sprintf.c (get_format_string): Correct the detection
of character types.
(is_call_safe): New function.
(try_substitute_return_value): Call it.
(try_simplify_call): New function.
(pass_sprintf_length::handle_gimple_call): Call it.
gcc/testsuite/ChangeLog:
PR middle-end/77671
* gcc.dg/tree-ssa/builtin-sprintf-7.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-8.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Adjust.
* gcc.dg/tree-ssa/builtin-sprintf-warn-2.c: Adjust.
* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-7.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/gimple-fold.h
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-3.c
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Implemented in r248035.
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Subject: [Bug c/80731] poor -Woverflow warnings, missing detail
Date: Sun, 14 May 2017 17:51:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-14
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a simple patch.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/77671] missing -Wformat-overflow warning on sprintf overflow with "%s"
Date: Sun, 14 May 2017 18:00:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sun May 14 17:50:28 2017
New Revision: 248035
URL: https://gcc.gnu.org/viewcvs?rev=248035&root=gcc&view=rev
Log:
PR middle-end/77671 - missing -Wformat-overflow warning on sprintf overflow
with %s
gcc/ChangeLog:
PR middle-end/77671
* gimple-fold.c (gimple_fold_builtin_sprintf): Make extern.
(gimple_fold_builtin_snprintf): Same.
* gimple-fold.h (gimple_fold_builtin_sprintf): Declare.
(gimple_fold_builtin_snprintf): Same.
* gimple-ssa-sprintf.c (get_format_string): Correct the detection
of character types.
(is_call_safe): New function.
(try_substitute_return_value): Call it.
(try_simplify_call): New function.
(pass_sprintf_length::handle_gimple_call): Call it.
gcc/testsuite/ChangeLog:
PR middle-end/77671
* gcc.dg/tree-ssa/builtin-sprintf-7.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-8.c: New test.
* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Adjust.
* gcc.dg/tree-ssa/builtin-sprintf-warn-2.c: Adjust.
* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-7.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/gimple-fold.h
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-3.c
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Implemented in r248035.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
Date: Sun, 14 May 2017 18:43:00 -0000
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
It doesn't look like r247962 resolves the failures. I continue to see them
with the top of trunk.
$ nice make -C /opt/notnfs/msebor/build/gcc-77671/gcc -j56
RUNTESTFLAGS='tree-prof.exp' check-c 2>&1 | grep FAIL
FAIL: gcc.dg/tree-prof/crossmodule-indircall-1.c execution, -g
FAIL: gcc.dg/tree-prof/val-prof-8.c execution, -g
FAIL: gcc.dg/tree-prof/pr52027.c execution, -g
FAIL: gcc.dg/tree-prof/val-prof-1.c execution, -g
FAIL: gcc.dg/tree-prof/ic-misattribution-1.c execution, -g
FAIL: gcc.dg/tree-prof/val-prof-2.c execution, -g
FAIL: gcc.dg/tree-prof/pr79587.c execution, -g
FAIL: gcc.dg/tree-prof/peel-1.c execution, -g
$ nice make -C /opt/notnfs/msebor/build/gcc-77671/gcc -j56
RUNTESTFLAGS='tree-prof.exp' check-c 2>&1 | grep FAIL
FAIL: gcc.dg/tree-prof/prof-robust-1.c execution, -g
FAIL: gcc.dg/tree-prof/pr49299-1.c execution, -g
FAIL: gcc.dg/tree-prof/val-prof-8.c execution, -g
FAIL: gcc.dg/tree-prof/val-prof-2.c execution, -g
FAIL: gcc.dg/tree-prof/pr52150.c execution, -g
The log shows the same errors:
spawn [open ...]
Permission error mapping pages.
Consider increasing /proc/sys/kernel/perf_event_mlock_kb,
or try again with a smaller value of -m/--mmap_pages.
(current value: 4294967295,0)
FAIL: gcc.dg/tree-prof/pr52150.c execution, -g
This is on the same 65-core x86_64 machine running Fedora 25, and with the same
512 setting in perf_event_mlock_kb.
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From: "andi at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/77684] many tree-prof testsuite failures in parallel make check
Date: Sun, 14 May 2017 18:56:00 -0000
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--- Comment #8 from andi at firstfloor dot org ---
> The log shows the same errors:
> spawn [open ...]
> Permission error mapping pages.
> Consider increasing /proc/sys/kernel/perf_event_mlock_kb,
> or try again with a smaller value of -m/--mmap_pages.
> (current value: 4294967295,0)
That's strange. it should be smaller with the -m flag.
Perhaps missed some case.
-Andi
> FAIL: gcc.dg/tree-prof/pr52150.c execution, -g
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Subject: [Bug c/80743] New: ice in estimate_node_size_and_ti me, at ipa-inline-analysis.c:3385
Date: Sun, 14 May 2017 19:07:00 -0000
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Bug ID: 80743
Summary: ice in estimate_node_size_and_ti me, at
ipa-inline-analysis.c:3385
Product: gcc
Version: 7.0
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Created attachment 41354
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41354&action=edit
gzipped C source code
While compiling a recent Linux kernel, I got trunk gcc to say this:
security/keys/dh.c:362:1: internal compiler error: in estimate_node_size_and_ti
me, at ipa-inline-analysis.c:3385
0x9c2c6c estimate_node_size_and_time
../../trunk/gcc/ipa-inline-analysis.c:3385
0x9c2c6c do_estimate_edge_time(cgraph_edge*)
../../trunk/gcc/ipa-inline-analysis.c:3935
0x9c2d8f do_estimate_edge_size(cgraph_edge*)
../../trunk/gcc/ipa-inline-analysis.c:3989
0x9c2fef estimate_edge_size
../../trunk/gcc/ipa-inline.h:304
gcc bug seems to be between revision 246605 and 247438
/home/dcb/gcc/results.246605/bin/gcc
/home/dcb/gcc/results.247438/bin/gcc
security/keys/dh.c:362:1: internal compiler error: in estimate_node_size_and_ti
me, at ipa-inline-analysis.c:3385
Flag -O2 required. I'll have a go at reducing the code.
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Subject: [Bug middle-end/80743] ice in estimate_node_size_and_ti me, at ipa-inline-analysis.c:3385
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced source code is
a, b, c;
e(unsigned long f) {
if (!f)
return 0;
if (f <= 3)
return;
if (f <= 6)
return;
if (f <= 32)
return;
if (f <= 64)
return;
if (f <= 128)
return;
if (f <= 256)
return 8;
}
inline g(unsigned long f) {
if (f > 1 << 12)
return;
int d = e(f);
h(d);
}
i(unsigned long f, int p2) {
j(a, c, b, 0);
if (p2)
g(f);
}
k() { i(k, 0); }
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Subject: [Bug target/80600] hidden symbol `__cpu_model' is referenced by DSO
Date: Mon, 15 May 2017 01:02:00 -0000
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--- Comment #11 from Krister Walfridsson <kristerw at gcc dot gnu.org> ---
Author: kristerw
Date: Sun May 14 22:49:03 2017
New Revision: 248037
URL: https://gcc.gnu.org/viewcvs?rev=248037&root=gcc&view=rev
Log:
PR target/80600 - hidden symbol '__cpu_model' is referenced by DSO
gcc/ChangeLog:
PR target/80600
* config/netbsd.h (NETBSD_LIBGCC_SPEC): Always add -lgcc.
libgcc/ChangeLog:
PR target/80600
* config.host (*-*-netbsd*): Add t-slibgcc-libgcc to tmake_file.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/netbsd.h
trunk/libgcc/ChangeLog
trunk/libgcc/config.host
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Subject: [Bug pending/80744] New: Detect Divide By Zero and give a warning in C/C++
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Bug ID: 80744
Summary: Detect Divide By Zero and give a warning in C/C++
Product: gcc
Version: 5.4.0
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Could GCC be expanded for -Wdiv-by-zero to detect these?
$200 bounty
// (A), (B) and (C) should give "warning: unsafe, may divide by zero
// (D) is from a const, NB shouldn't give a warning
void test_func(const size_t value, const string & mystr)
{
const size_t i = 0;
const size_t j = 1;
printf("A %zu mystr\n", 5 / mystr.size());
printf("B %zu\n", 10/i);
printf("C %zu\n", i/value);
printf("D %zu\n", 10/j);
}
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Subject: [Bug c/80745] New: inconsistent warning: large integer implicitly truncated to unsigned type
Date: Mon, 15 May 2017 02:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80745
Bug ID: 80745
Summary: inconsistent warning: large integer implicitly
truncated to unsigned type
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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In four declarations below, the initializer expression is truncated when
assigned to unsigned char. Yet only the first two initializers are diagnosed
(the warning message could be more helpful but that's the subject of bug
80731). The same problem affects other unsigned integers besides unsigned
char.
All four initializers should be diagnosed.
$ cat t.c && gcc -S -Wall -Wextra -Wpedantic -Woverflow t.c
#include <limits.h>
unsigned char uc1 = UCHAR_MAX + 1U;
unsigned char uc2 = USHRT_MAX + 1U;
unsigned char uc3 = UINT_MAX + 1U;
unsigned char uc4 = ULONG_MAX + 1LU;
t.c:3:21: warning: large integer implicitly truncated to unsigned type
[-Woverflow]
unsigned char uc1 = UCHAR_MAX + 1U;
^~~~~~~~~
t.c:4:21: warning: large integer implicitly truncated to unsigned type
[-Woverflow]
unsigned char uc2 = USHRT_MAX + 1U;
^~~~~~~~~
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Subject: [Bug c/80745] inconsistent warning: large integer implicitly truncated to unsigned type
Date: Mon, 15 May 2017 03:32:00 -0000
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The reason for the missing warning is that in the latter two cases the
initializer expression itself wraps around to zero, which isn't diagnosed or
detected, and the initialization then isn't diagnosed.
It seems that unsigned integer wrapping should be diagnosed independently of
signed integer overflow (e.g., under -Wtruncation or something like that), and
consistently for any kind of unsigned truncation or wrapping.
As a data point, Clang diagnoses the truncation with -Wconstant-conversion, but
it also fails to diagnose the same two cases as GCC.
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From: "tom at honermann dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80746] New: [concepts] ICE evaluating constraints for concepts with dependent template parameters
Date: Mon, 15 May 2017 03:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80746
Bug ID: 80746
Summary: [concepts] ICE evaluating constraints for concepts
with dependent template parameters
Product: gcc
Version: c++-concepts
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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gcc 6.2/7.0/trunk reports an ICE when checking constraints involving concepts
defined with dependent template parameters:
$ cat t.cpp
template<typename T, typename T::type>
concept bool C = true;
template<C<0> T> class ct {};
struct S {
using type = int;
};
template class ct<S>;
$ g++ --version
g++ (GCC) 8.0.0 20170513 (experimental)
...
$ g++ -c -fconcepts t.cpp
t.cpp:3:13: internal compiler error: in tsubst, at cp/pt.c:13471
template<C<0> T> class ct {};
^
0x5dc61a tsubst(tree_node*, tree_node*, int, tree_node*)
../../source/gcc/cp/pt.c:13471
0x5daf5e tsubst(tree_node*, tree_node*, int, tree_node*)
../../source/gcc/cp/pt.c:13895
0x5e6720 convert_template_argument
../../source/gcc/cp/pt.c:7623
0x5e7a10 coerce_template_parms
../../source/gcc/cp/pt.c:8098
0x6de12a resolve_variable_concept_check(tree_node*)
../../source/gcc/cp/constraint.cc:304
0x6de1d4 deduce_constrained_parameter(tree_node*, tree_node*&, tree_node*&)
../../source/gcc/cp/constraint.cc:329
0x61f41e cp_parser_maybe_constrained_type_specifier
../../source/gcc/cp/parser.c:17097
0x6333bd cp_parser_maybe_partial_concept_id
../../source/gcc/cp/parser.c:17154
0x6333bd cp_parser_template_id
../../source/gcc/cp/parser.c:15513
0x63362f cp_parser_class_name
../../source/gcc/cp/parser.c:21974
0x63dcc7 cp_parser_qualifying_entity
../../source/gcc/cp/parser.c:6287
0x63dcc7 cp_parser_nested_name_specifier_opt
../../source/gcc/cp/parser.c:5973
0x62a650 cp_parser_constructor_declarator_p
../../source/gcc/cp/parser.c:25986
0x62a650 cp_parser_decl_specifier_seq
../../source/gcc/cp/parser.c:13332
0x6448b5 cp_parser_parameter_declaration
../../source/gcc/cp/parser.c:21204
0x645856 cp_parser_template_parameter
../../source/gcc/cp/parser.c:15133
0x645856 cp_parser_template_parameter_list
../../source/gcc/cp/parser.c:14722
0x64670b cp_parser_explicit_template_declaration
../../source/gcc/cp/parser.c:26580
0x64670b cp_parser_template_declaration_after_export
../../source/gcc/cp/parser.c:26614
0x62b369 cp_parser_declaration
../../source/gcc/cp/parser.c:12462
...
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From: "tom at honermann dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80746] [concepts] ICE evaluating constraints for concepts with dependent template parameters
Date: Mon, 15 May 2017 03:35:00 -0000
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Tom Honermann <tom at honermann dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |67491
--- Comment #1 from Tom Honermann <tom at honermann dot net> ---
This seems likely to be related to:
- Bug 67147 - [concepts] ICE on checking concept with default template
arguments
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
[Bug 67491] [meta-bug] concepts issues
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Subject: [Bug c++/67147] [concepts] ICE on checking concept with default template arguments
Date: Mon, 15 May 2017 03:56:00 -0000
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--- Comment #2 from Tom Honermann <tom at honermann dot net> ---
The following bug looks likely to be related:
- Bug 80746 - [concepts] ICE evaluating constraints for concepts with dependent
template parameters
>From gcc-bugs-return-563457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 03:56:54 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80747] New: gcc.dg/tree-ssa/tailrecursion-4.c fails with ICE when compiled with options "-fprofile-use -freorder-blocks-and-partition"
Date: Mon, 15 May 2017 04:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80747
Bug ID: 80747
Summary: gcc.dg/tree-ssa/tailrecursion-4.c fails with ICE when
compiled with options "-fprofile-use
-freorder-blocks-and-partition"
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zwzhangwen.zhang at huawei dot com
Target Milestone: ---
Created attachment 41355
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41355&action=edit
my patch for fix this ICE.
When I test bb-reorder pass with deja testcase, this ICE has been found.
Compile line is as follow:
./install/bin/mips-sde-elf-gcc -fprofile-use -freorder-blocks-and-partition
-O1 -foptimize-sibling-calls -S tailrecursion-4.c
The ICE information is:
tailrecursion-4.c: In function 't':
tailrecursion-4.c:16:1: internal compiler error: in df_compact_blocks, at
df-core.c:1743
}
^
0x859fce df_compact_blocks()
/home/wangtao/SDK_CPU_HCC_TEST/hi1822/SDK_CPU_HCC/build/script/1822/hi1822_build_dir/src/gcc-6.3.0/gcc/df-core.c:1743
0x11f3abe compact_blocks()
/home/wangtao/SDK_CPU_HCC_TEST/hi1822/SDK_CPU_HCC/build/script/1822/hi1822_build_dir/src/gcc-6.3.0/gcc/cfg.c:159
0x813fea relink_block_chain(bool)
/home/wangtao/SDK_CPU_HCC_TEST/hi1822/SDK_CPU_HCC/build/script/1822/hi1822_build_dir/src/gcc-6.3.0/gcc/cfgrtl.c:3654
0x11e85c9 reorder_basic_blocks
/home/wangtao/SDK_CPU_HCC_TEST/hi1822/SDK_CPU_HCC/build/script/1822/hi1822_build_dir/src/gcc-6.3.0/gcc/bb-reorder.c:2501
0x11e862c execute
/home/wangtao/SDK_CPU_HCC_TEST/hi1822/SDK_CPU_HCC/build/script/1822/hi1822_build_dir/src/gcc-6.3.0/gcc/bb-reorder.c:2591
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
I debug it, and find that there is a bug when reorder bb according to cold/hot
partition in function reorder_basic_blocks_simple. In
find_rarely_executed_basic_blocks_and_crossing_edges will not set partition for
the first bb(cfun->cfg->x_entry_block_ptr), but reorderring bb in
reorder_basic_blocks_simple may be according to the partition of the first bb.
Therefore, after reorderring, some bbs have been lost, which triggered ICE.
According to the above, I set a default partition for reorderring bb when
partition is neither hot nor cold, which as the attachment shows. Please check
my solution and give some suggestion.
Thanks a lot.
>From gcc-bugs-return-563458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:13:17 2017
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Subject: [Bug c++/80748] New: [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80748
Bug ID: 80748
Summary: [concepts] noexcept specifier operands are allowed but
ignored in compound requirements
Product: gcc
Version: c++-concepts
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at honermann dot net
CC: andrew.n.sutton at gmail dot com, asutton at gcc dot gnu.org
Target Milestone: ---
It appears that an operand provided to the noexcept specifier in compound
requirements is ignored; the presence of any exception specification appears to
be interpreted as introducing an exception constraint:
$ cat t.cpp
template<typename T>
concept bool C = requires { { T::smf() } noexcept(false); };
struct S1 {
static void smf();
};
struct S2 {
static void smf() noexcept;
};
static_assert(C<S1>);
static_assert(C<S2>);
$ g++ --version
g++ (GCC) 8.0.0 20170513 (experimental)
...
$ g++ -c -fconcepts t.cpp
t.cpp:9:1: error: static assertion failed
static_assert(C<S1>);
^~~~~~~~~~~~~
In the above example, the expectation is that the compound requirement having a
'noexcept(false)' specifier will confer no exception constraint requirement and
that both S1 and S2 should satisfy constraint checks. However, S1 is rejected.
The test case above is ill-formed according to the Concepts TS (N4641) given
that compound requirements are specified to only accept an optional 'noexcept'
specifier (without operands):
§ 5.1.4.3 Compound requirements [expr.prim.req.compound]
compound-requirement:
{ expression } noexcept[opt] trailing-return-type[opt] ;
gcc allows an operand to be specified, but appears not to evaluate it. If the
intent of the TS is to disallow operands to the noexcept specifier in compound
requirements, then gcc should reject them. Otherwise, if the intent of the TS
is to allow operands, then gcc should evaluate them and conditionally apply
exception constraints (and an issue opened with the Concepts TS).
>From gcc-bugs-return-563459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:17:44 2017
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Subject: [Bug c++/80749] New: [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80749
Bug ID: 80749
Summary: [concepts] noexcept specifier operands are allowed but
ignored in compound requirements
Product: gcc
Version: c++-concepts
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at honermann dot net
CC: andrew.n.sutton at gmail dot com, asutton at gcc dot gnu.org
Target Milestone: ---
It appears that an operand provided to the noexcept specifier in compound
requirements is ignored; the presence of any exception specification appears to
be interpreted as introducing an exception constraint:
$ cat t.cpp
template<typename T>
concept bool C = requires { { T::smf() } noexcept(false); };
struct S1 {
static void smf();
};
struct S2 {
static void smf() noexcept;
};
static_assert(C<S1>);
static_assert(C<S2>);
$ g++ --version
g++ (GCC) 8.0.0 20170513 (experimental)
...
$ g++ -c -fconcepts t.cpp
t.cpp:9:1: error: static assertion failed
static_assert(C<S1>);
^~~~~~~~~~~~~
In the above example, the expectation is that the compound requirement having a
'noexcept(false)' specifier will confer no exception constraint requirement and
that both S1 and S2 should satisfy constraint checks. However, S1 is rejected.
The test case above is ill-formed according to the Concepts TS (N4641) given
that compound requirements are specified to only accept an optional 'noexcept'
specifier (without operands):
§ 5.1.4.3 Compound requirements [expr.prim.req.compound]
compound-requirement:
{ expression } noexcept[opt] trailing-return-type[opt] ;
gcc allows an operand to be specified, but appears not to evaluate it. If the
intent of the TS is to disallow operands to the noexcept specifier in compound
requirements, then gcc should reject them. Otherwise, if the intent of the TS
is to allow operands, then gcc should evaluate them and conditionally apply
exception constraints (and an issue opened with the Concepts TS).
>From gcc-bugs-return-563461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:28:55 2017
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Subject: [Bug c++/80748] [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:28:00 -0000
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Tom Honermann <tom at honermann dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Tom Honermann <tom at honermann dot net> ---
Closing as a duplicate of bug 80750 (web server connectivity issues resulted in
multiple submissions).
*** This bug has been marked as a duplicate of bug 80750 ***
>From gcc-bugs-return-563460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:24:47 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80750] New: [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80750
Bug ID: 80750
Summary: [concepts] noexcept specifier operands are allowed but
ignored in compound requirements
Product: gcc
Version: c++-concepts
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at honermann dot net
CC: andrew.n.sutton at gmail dot com, asutton at gcc dot gnu.org
Target Milestone: ---
It appears that an operand provided to the noexcept specifier in compound
requirements is ignored; the presence of any exception specification appears to
be interpreted as introducing an exception constraint:
$ cat t.cpp
template<typename T>
concept bool C = requires { { T::smf() } noexcept(false); };
struct S1 {
static void smf();
};
struct S2 {
static void smf() noexcept;
};
static_assert(C<S1>);
static_assert(C<S2>);
$ g++ --version
g++ (GCC) 8.0.0 20170513 (experimental)
...
$ g++ -c -fconcepts t.cpp
t.cpp:9:1: error: static assertion failed
static_assert(C<S1>);
^~~~~~~~~~~~~
In the above example, the expectation is that the compound requirement having a
'noexcept(false)' specifier will confer no exception constraint requirement and
that both S1 and S2 should satisfy constraint checks. However, S1 is rejected.
The test case above is ill-formed according to the Concepts TS (N4641) given
that compound requirements are specified to only accept an optional 'noexcept'
specifier (without operands):
§ 5.1.4.3 Compound requirements [expr.prim.req.compound]
compound-requirement:
{ expression } noexcept[opt] trailing-return-type[opt] ;
gcc allows an operand to be specified, but appears not to evaluate it. If the
intent of the TS is to disallow operands to the noexcept specifier in compound
requirements, then gcc should reject them. Otherwise, if the intent of the TS
is to allow operands, then gcc should evaluate them and conditionally apply
exception constraints (and an issue opened with the Concepts TS).
>From gcc-bugs-return-563462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:28:55 2017
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Subject: [Bug c++/80750] [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:29:00 -0000
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--- Comment #1 from Tom Honermann <tom at honermann dot net> ---
*** Bug 80748 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-563463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 04:29:35 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80749] New: [concepts] noexcept specifier operands are allowed but ignored in compound requirements
Date: Mon, 15 May 2017 04:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80749
Bug ID: 80749
Summary: [concepts] noexcept specifier operands are allowed but
ignored in compound requirements
Product: gcc
Version: c++-concepts
Status: RESOLVED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at honermann dot net
CC: andrew.n.sutton at gmail dot com, asutton at gcc dot gnu.org
Target Milestone: ---
Status: RESOLVED
Resolution: DUPLICATE
It appears that an operand provided to the noexcept specifier in compound
requirements is ignored; the presence of any exception specification appears to
be interpreted as introducing an exception constraint:
$ cat t.cpp
template<typename T>
concept bool C = requires { { T::smf() } noexcept(false); };
struct S1 {
static void smf();
};
struct S2 {
static void smf() noexcept;
};
static_assert(C<S1>);
static_assert(C<S2>);
$ g++ --version
g++ (GCC) 8.0.0 20170513 (experimental)
...
$ g++ -c -fconcepts t.cpp
t.cpp:9:1: error: static assertion failed
static_assert(C<S1>);
^~~~~~~~~~~~~
In the above example, the expectation is that the compound requirement having a
'noexcept(false)' specifier will confer no exception constraint requirement and
that both S1 and S2 should satisfy constraint checks. However, S1 is rejected.
The test case above is ill-formed according to the Concepts TS (N4641) given
that compound requirements are specified to only accept an optional 'noexcept'
specifier (without operands):
§ 5.1.4.3 Compound requirements [expr.prim.req.compound]
compound-requirement:
{ expression } noexcept[opt] trailing-return-type[opt] ;
gcc allows an operand to be specified, but appears not to evaluate it. If the
intent of the TS is to disallow operands to the noexcept specifier in compound
requirements, then gcc should reject them. Otherwise, if the intent of the TS
is to allow operands, then gcc should evaluate them and conditionally apply
exception constraints (and an issue opened with the Concepts TS).
--- Comment #1 from Tom Honermann <tom at honermann dot net> ---
Closing as a duplicate of bug 80750 (web server connectivity issues resulted in
multiple submissions).
*** This bug has been marked as a duplicate of bug 80750 ***
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Subject: [Bug c++/80750] [concepts] noexcept specifier operands are allowed but ignored in compound requirements
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--- Comment #2 from Tom Honermann <tom at honermann dot net> ---
*** Bug 80749 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
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--- Comment #9 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 7.1.0 and in trunk 8.0.0!
Will it ever be fixed?
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Subject: [Bug fortran/50410] [5/6/7/8 Regression] ICE in record_reference
Date: Mon, 15 May 2017 04:58:00 -0000
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--- Comment #27 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 7.1.0 and trunk 8.0.0
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Subject: [Bug fortran/50402] ICE in gfc_conv_expr_descriptor
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--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
ICE still in 7.1.0 and trunk 8.0.0
Even if the code is invalid the compiler should not just crash.
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 8.0.0 trunk 247930
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Subject: [Bug fortran/80751] New: NULL pointer dereferencing in gfc_trans_call on calling elemental procedure (trunk 247930)
Date: Mon, 15 May 2017 07:07:00 -0000
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Bug ID: 80751
Summary: NULL pointer dereferencing in gfc_trans_call on
calling elemental procedure (trunk 247930)
Product: gcc
Version: 8.0
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This issue is exposed by adding a gcc_assert at trans-stmt.c:455
! NULL pointer dereferencing in gfc_trans_call on calling elemental procedure
(trunk 247930)
!trans-stmt.c:455 gcc_assert(code->expr1); /*!vz my addition
gfortran.dg/bounds_check_fail_2.f90*/
!trans-stmt.c:456 gfc_conv_loop_setup (&loop, &code->expr1->where);
interface
elemental subroutine sub(i)
intent(in) :: i
end subroutine
end interface
call sub((/1,2/))
end
!.f:9:0:
! call sub((/1,2/))
!internal compiler error: in gfc_trans_call, at fortran/trans-stmt.c:455
!0xc6ee72 gfc_trans_call(gfc_code*, bool, tree_node*, tree_node*, bool)
! ../../gcc/fortran/trans-stmt.c:455
!0x99834e trans_code
! ../../gcc/fortran/trans.c:1885
!0x99900f gfc_trans_code(gfc_code*)
! ../../gcc/fortran/trans.c:2128
!0xa9d0cf gfc_generate_function_code(gfc_namespace*)
! ../../gcc/fortran/trans-decl.c:6332
!0x999080 gfc_generate_code(gfc_namespace*)
! ../../gcc/fortran/trans.c:2145
!0x81564d translate_all_program_units
! ../../gcc/fortran/parse.c:6074
!0x82be66 gfc_parse_file()
! ../../gcc/fortran/parse.c:6274
!0x970e19 gfc_be_parse_file
! ../../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.
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Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
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--- Comment #10 from kargl at gcc dot gnu.org ---
(In reply to Vittorio Zecca from comment #9)
> Still in 7.1.0 and in trunk 8.0.0!
> Will it ever be fixed?
You forgot to attach our patch. Your initial report
of the bug is 2011-09-14. It seems that you've had
nearly 6 years to develop a patch.
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Subject: [Bug target/80582] Missing intrinsics _mm256_set_m128*
Date: Mon, 15 May 2017 07:46:00 -0000
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--- Comment #2 from Yulia Koval <julia.koval at intel dot com> ---
This is fixed on trunk:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=23f05e90ea5b60b676c69f5bf481bfd6c3a90160
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Subject: [Bug target/80582] Missing intrinsics _mm256_set_m128*
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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From: "kloedej at knmi dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80666] character length parameter fails if declaration order incorrect
Date: Mon, 15 May 2017 07:56:00 -0000
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--- Comment #6 from Jos de Kloe <kloedej at knmi dot nl> ---
Thanks for your test results and views on this matter.
> (1) PARAMETER has a very precise definition in Fortran and AFAICT this
> definition (named constants) does not match your use in the above quotation.
> Are you meaning dummy arguments?
As I am using several programming languages, it happens that I mix up
terminology, so yes in this case I was referring to "dummy arguments".
>(2) If yes, there is no correlation between the order the dummy arguments and
> the individual type declarations. The order of type declarations is only a
> matter of coding style, provided they follow the rule "define before using".
I guess this answers my question. The "order of type declarations" is the one
that should be in the right order. So my first example code was invalid
fortran95.
I still am not sure where in the fortran standard this is defined, but then it
is a rather difficult document to read. Having noted this in bugzilla is useful
by itself I think. Now others can find it when searching for issues.
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Mon, 15 May 2017 07:56:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 15 07:53:37 2017
New Revision: 248047
URL: https://gcc.gnu.org/viewcvs?rev=248047&root=gcc&view=rev
Log:
2017-05-15 Richard Biener <rguenther@suse.de>
Revert backport of
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
Removed:
branches/gcc-6-branch/gcc/testsuite/g++.dg/pr80222.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/gimple-fold.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Mon, 15 May 2017 08:14:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 15 07:56:00 2017
New Revision: 248048
URL: https://gcc.gnu.org/viewcvs?rev=248048&root=gcc&view=rev
Log:
2017-05-15 Richard Biener <rguenther@suse.de>
Revert backport of
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
Removed:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr80222.C
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/80222] may_alias folded away
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 7 instead.
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Subject: [Bug fortran/80554] [f08] variable redefinition in submodule
Date: Mon, 15 May 2017 08:35:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Tamas Bela Feher from comment #0)
> Created attachment 41281 [details]
> submodule redefines a variable from the ancestor module
>
> Dear GFortran team,
>
> In the attached program, module M and its submodule S both define a
> variable with the name i. This triggers an error message in GFortran 6.3.0
> and also in the latest version form SVN trunk.
>
> The Intel Fortran compiler accepts the code, and the compiled code produces
> the following output:
> ./a.out
> 137
>
> I think GFortran should also accept the code. As far as I know, entities
> from the ancestor module are host associated, and we should be allowed to
> specify a local entity in the submodule with the same name. Or is there any
> restriction in the standard which forbids it?
>
> Could you look into this problem? Thank you for your help.
>
> Best regards,
> Tamas
>
>
> $ cat submod_var_scope.f90
> module M
> implicit none
> integer :: i = 0
> interface
> module subroutine write_i()
> end subroutine
> end interface
> end module
>
> submodule (M) S
> integer :: i = 137
> contains
> module subroutine write_i()
> write (*,*) i
> end subroutine
> end submodule
>
> program test_submod_variable
> use M
> implicit none
> i = 42
> call write_i
> end program
>
> $ gfortran-6 -v submod_var_scope.f90
> Driving: gfortran-6 -v submod_var_scope.f90 -l gfortran -l m -shared-libgcc
> Using built-in specs.
> COLLECT_GCC=gfortran-6
> COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/6.3.0/lto-
> wrapper
> Target: x86_64-pc-linux-gnu
> Configured with: ../gcc-6.3.0/configure --program-suffix=-6
> Thread model: posix
> gcc version 6.3.0 (GCC)
> COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
> /usr/local/libexec/gcc/x86_64-pc-linux-gnu/6.3.0/f951 submod_var_scope.f90
> -quiet -dumpbase submod_var_scope.f90 -mtune=generic -march=x86-64 -auxbase
> submod_var_scope -version -fintrinsic-modules-path
> /usr/local/lib/gcc/x86_64-pc-linux-gnu/6.3.0/finclude -o /tmp/ccq0YC9g.s
> GNU Fortran (GCC) version 6.3.0 (x86_64-pc-linux-gnu)
> compiled by GNU C version 6.3.0, GMP version 6.1.2, MPFR version
> 3.1.3, MPC version 1.0.3, isl version none
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> GNU Fortran2008 (GCC) version 6.3.0 (x86_64-pc-linux-gnu)
> compiled by GNU C version 6.3.0, GMP version 6.1.2, MPFR version
> 3.1.3, MPC version 1.0.3, isl version none
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> submod_var_scope.f90:11:14:
>
> integer :: i = 137
> 1
> Error: Symbol ‘i’ at (1) already has basic type of INTEGER
>
>
> $ gfortran-svn -v submod_var_scope.f90
> Driving: gfortran-svn -v submod_var_scope.f90 -l gfortran -l m -shared-libgcc
> Using built-in specs.
> COLLECT_GCC=gfortran-svn
> COLLECT_LTO_WRAPPER=/opt/gcc-svn/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-
> wrapper
> Target: x86_64-pc-linux-gnu
> Configured with: ../gcc-svn-trunk/configure --prefix=/opt/gcc-svn
> --program-suffix=-svn --enable-languages=c,fortran
> Thread model: posix
> gcc version 8.0.0 20170427 (experimental) (GCC)
> COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
> /opt/gcc-svn/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/f951
> submod_var_scope.f90 -quiet -dumpbase submod_var_scope.f90 -mtune=generic
> -march=x86-64 -auxbase submod_var_scope -version -fintrinsic-modules-path
> /opt/gcc-svn/lib/gcc/x86_64-pc-linux-gnu/8.0.0/finclude -o /tmp/ccRu9s2z.s
> GNU Fortran (GCC) version 8.0.0 20170427 (experimental) (x86_64-pc-linux-gnu)
> compiled by GNU C version 8.0.0 20170427 (experimental), GMP version
> 6.1.2, MPFR version 3.1.3, MPC version 1.0.3, isl version none
> GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
> GNU Fortran2008 (GCC) version 8.0.0 20170427 (experimental)
> (x86_64-pc-linux-gnu)
> compiled by GNU C version 8.0.0 20170427 (experimental), GMP version
> 6.1.2, MPFR version 3.1.3, MPC version 1.0.3, isl version none
> GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
> submod_var_scope.f90:11:14:
>
> integer :: i = 137
> 1
> Error: Symbol ‘i’ at (1) already has basic type of INTEGER
As you correctly point out, entities from the parent module are host associated
in the submodule. Thus, the message is absolutely correct and the nub is
whether or not this is an error.
Somewhere in the deep and distant past a bug report came up concerning double
declarations of TKR within a scoping unit. The gfortran developers at the time
determined that this was not allowed or, rather, should not be allowed. This is
the reason why gfortran is flagging up an error.
I cannot find anything in the standard that overrides the normal interpretation
of host association in submodules and so I think that you are correct to say
that this is a bug.
I will take it.
Thanks
Paul
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Subject: [Bug fortran/80554] [f08] variable redefinition in submodule
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Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
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--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
> I'm not able to reproduce the warning mentioned in comment #1 either with a
> native x86_64 compiler (-m32 or -m64), or with the cross-compilers I tried
> (powerpc64le-linux and sparcv9-sun-solaris2.11).
No wonder: as for Solaris/SPARC, only the warning in comment#0 occurs.
The other one has only been reported for Darwin/x86_64 AFAICS.
Rainer
>From gcc-bugs-return-563480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 08:42:56 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 ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 08:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
x/3 (x) @0x7f32cb27a170
Type: function definition analyzed
Visibility: prevailing_def_ironly
References: b/1 (read)
Referring:
Availability: local
First run: 0
Function flags: body local
Called by: f/4 (1.00 per call)
Calls:
so IPA references are only listing explicit references and referring/references
has no way to catch the "escape" site.
Honza?
Note that in other PRs we explicitely said that "locals" (which includes
static globals) need explicit clobbering. That is, automatic vars that
do not have their address taken are not considered accessible by a
"memory" clobber either.
>From gcc-bugs-return-563481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 08:44:58 2017
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From: "valeryweber at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80752] New: ICE with wrong type initialization
Date: Mon, 15 May 2017 08:49:00 -0000
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Bug ID: 80752
Summary: ICE with wrong type initialization
Product: gcc
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Hi All
The following wrong code is ICEing.
v
MODULE cp_mgga_exchange_utils
IMPLICIT NONE
INTEGER, PARAMETER, PUBLIC :: real_8 = SELECTED_REAL_KIND ( 14, 200 )
TYPE, PRIVATE :: m05_m06_x_t
LOGICAL :: add_vs98 = 0.0_real_8
END TYPE m05_m06_x_t
TYPE, PRIVATE :: cp_mgga_x_param_t
TYPE(m05_m06_x_t) :: M05_M06
END TYPE cp_mgga_x_param_t
TYPE(cp_mgga_x_param_t), PUBLIC, SAVE :: cp_mgga_x_param
END MODULE cp_mgga_exchange_utils
gfortran-intel-7.1.0 -c cp_mgga_exchange_utils.mod.F90
cp_mgga_exchange_utils.mod.F90:5:46:
LOGICAL :: add_vs98 = 0.0_real_8
1
internal compiler error: Can't convert ‘REAL(8)’ to ‘LOGICAL(4)’ at (1)
0x5a1ec8 gfc_internal_error(char const*, ...)
../../gcc-7.1.0/gcc/fortran/error.c:1348
0x5b592f gfc_convert_type_warn(gfc_expr*, gfc_typespec*, int, int)
../../gcc-7.1.0/gcc/fortran/intrinsic.c:5069
0x5a93fa gfc_generate_initializer(gfc_typespec*, bool)
../../gcc-7.1.0/gcc/fortran/expr.c:4398
0x59aab4 variable_decl
../../gcc-7.1.0/gcc/fortran/decl.c:2437
0x59aab4 gfc_match_data_decl()
../../gcc-7.1.0/gcc/fortran/decl.c:4888
0x5f9e29 match_word
../../gcc-7.1.0/gcc/fortran/parse.c:65
0x5fc871 decode_statement
../../gcc-7.1.0/gcc/fortran/parse.c:376
0x5fe0d4 next_free
../../gcc-7.1.0/gcc/fortran/parse.c:1223
0x5fe0d4 next_statement
../../gcc-7.1.0/gcc/fortran/parse.c:1455
0x5ffc35 parse_derived
../../gcc-7.1.0/gcc/fortran/parse.c:3250
0x5ffc35 parse_spec
../../gcc-7.1.0/gcc/fortran/parse.c:3790
0x602933 parse_module
../../gcc-7.1.0/gcc/fortran/parse.c:5883
0x602c2f gfc_parse_file()
../../gcc-7.1.0/gcc/fortran/parse.c:6196
0x64a90f gfc_be_parse_file
../../gcc-7.1.0/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-563482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 08:48:49 2017
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Subject: [Bug target/80742] attribute target no- does not work
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid, diagnostic
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not sure if it was intended to do that.
>From gcc-bugs-return-563483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 08:49:00 2017
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Subject: [Bug middle-end/80743] ice in estimate_node_size_and_time, at ipa-inline-analysis.c:3385
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.0 |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Similar bug was mitigated recently.
>From gcc-bugs-return-563484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 08:50:37 2017
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Subject: [Bug rtl-optimization/80747] gcc.dg/tree-ssa/tailrecursion-4.c fails with ICE when compiled with options "-fprofile-use -freorder-blocks-and-partition"
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |mips-sde-elf
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please post patches on gcc-patches@
>From gcc-bugs-return-563485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:02:45 2017
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Subject: [Bug preprocessor/80753] New: __has_include and __has_include_next taints subsequent I/O errors
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80753
Bug ID: 80753
Summary: __has_include and __has_include_next taints subsequent
I/O errors
Product: gcc
Version: unknown
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Priority: P3
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Created attachment 41356
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__has_include testcase on a non-existent file
Hi.
It seems that whenever __has_include or __has_include_next is used, if the
header file is non-existent (i.e. reading it would cause an I/O error) any
subsequent #include on the same file will not fail, but error messages are
silently tainted and preprocessing continues as if nothing happened.
I tried pretty much every release since GCC 4.9 (up until the latest trunk),
and they all behave the same. I couldn't find any information suggesting that
this behaviour is to be expected and at least Clang (3.9) does not share this
behaviour.
$ cat has-include.c has-include-next.c
#if __has_include(<nonesuch>)
# error ".."
#endif
#include <nonesuch>
#if __has_include_next(<nonesuch_next>)
# error ".."
#endif
#include <nonesuch_next>
$ gcc -E has-include.c has-include-next.c && echo ok
# 1 "has-include.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "has-include.c"
# 1 "has-include-next.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "has-include-next.c"
ok
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Subject: [Bug preprocessor/80753] __has_include and __has_include_next taints subsequent I/O errors
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Created attachment 41357
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__has_include_next testcase on a non-existent file
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Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 09:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Nowadays C has atomics and fences in the language standard, so it doesn't
matter if x() had
asm volatile("":::"memory");
or
__atomic_{signal,thread}_fence(__ATOMIC_ACQ_REL);
or
return __atomic_load_n(&b, __ATOMIC_SEQ_CST);
In all three cases the compiler needs to place a memory barrier internally, and
in the latter two it's impossible to argue that the source code is missing a
clobber.
I think it's correct that "memory" clobber cannot touch non-addressable auto
vars, but extending that to static variables seems wrong. I'm not aware of any
instance (apart from this bug) where gcc does that.
>From gcc-bugs-return-563488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:17:07 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 target/80754] New: invalid smull instructions generated after r247881
Date: Mon, 15 May 2017 09:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80754
Bug ID: 80754
Summary: invalid smull instructions generated after r247881
Product: gcc
Version: 8.0
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Hi,
After r247881, below invalid smull instructions are generated:
smull r2, r2, lr, r3
in test gcc.c-torture/execute/pr53645-2.c for arm-none-linux-gnueabi and
cortex-a9
The revision simply changes rtx cost for tieable modes:
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 321363f..d9f57c3 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -4164,6 +4164,13 @@ rtx_cost (rtx x, machine_mode mode, enum rtx_code
outer_code,
return COSTS_N_INSNS (2 + factor);
break;
+ case TRUNCATE:
+ if (MODES_TIEABLE_P (mode, GET_MODE (XEXP (x, 0))))
+ {
+ total = 0;
+ break;
+ }
+ /* FALLTHRU */
default:
if (targetm.rtx_costs (x, mode, outer_code, opno, &total, speed))
return total
I noticed that in arm.h/arm.c:
/* Implement MODES_TIEABLE_P. */
bool
arm_modes_tieable_p (machine_mode mode1, machine_mode mode2)
{
if (GET_MODE_CLASS (mode1) == GET_MODE_CLASS (mode2))
return true;
/* We specifically want to allow elements of "structure" modes to
be tieable to the structure. This more general condition allows
other rarer situations too. */
if (TARGET_NEON
&& (VALID_NEON_DREG_MODE (mode1)
|| VALID_NEON_QREG_MODE (mode1)
|| VALID_NEON_STRUCT_MODE (mode1))
&& (VALID_NEON_DREG_MODE (mode2)
|| VALID_NEON_QREG_MODE (mode2)
|| VALID_NEON_STRUCT_MODE (mode2)))
return true;
return false;
}
So SImode/DImode are tieable on ARM target, while we have :
(define_insn "*smulsi3_highpart_v6"
[(set (match_operand:SI 0 "s_register_operand" "=r")
(truncate:SI
(lshiftrt:DI
(mult:DI
(sign_extend:DI (match_operand:SI 1 "s_register_operand" "r"))
(sign_extend:DI (match_operand:SI 2 "s_register_operand" "r")))
(const_int 32))))
(clobber (match_scratch:SI 3 "=r"))]
"TARGET_32BIT && arm_arch6"
"smull%?\\t%3, %0, %2, %1"
[(set_attr "type" "smull")
(set_attr "predicable" "yes")
(set_attr "predicable_short_it" "no")]
)
It looks operand 0 and 3 now get allocated to the same register.
I think this might be a backend issue either in tieable interface or
"*smulsi3_highpart_v6" constraint?
Thanks,
bin
>From gcc-bugs-return-563489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:20:47 2017
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Subject: [Bug preprocessor/80755] New: __has_include_next: internal compiler error: NULL directory in find_file
Date: Mon, 15 May 2017 09:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80755
Bug ID: 80755
Summary: __has_include_next: internal compiler error: NULL
directory in find_file
Product: gcc
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Created attachment 41358
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41358&action=edit
pulls last-include-dir/has_include_next
Hi.
__has_include_next gets confused, if it's called within a file that was
included in the very last include directory. Every GCC release since at least
4.9 is affected.
Note, the -idirafter is not culprit here. It's simply used to push the
`last-include-dir' as the last include directory in order to easily reproduce
this error. This problem does not occur, should there be any directory after
that in the search paths.
$ cat has_include_next.c
#include <has_include_next>
$ cat last-include-dir/has_include_next
#if __has_include_next(<anyfile>) // doesn't matter if exists
#endif
$ gcc -E -idirafter last-include-dir has_include_next.c
In file included from has_include_next.c:1:0:
last-include-dir/has_include_next:1:33: error: no include path in which to
search for anyfile
#if __has_include_next(<anyfile>) // doesn't matter if exists
^
cc1.exe: internal compiler error: NULL directory in find_file
>From gcc-bugs-return-563490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:21:36 2017
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Subject: [Bug preprocessor/80755] __has_include_next: internal compiler error: NULL directory in find_file
Date: Mon, 15 May 2017 09:43:00 -0000
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--- Comment #1 from Pekka S <pexu@gcc-bugzilla.mail.kapsi.fi> ---
Created attachment 41359
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trips __has_include_next. must be placed under last-include-dir/
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Subject: [Bug c/27214] The C frontend introduces undefined pointer overflow
Date: Mon, 15 May 2017 09:46:00 -0000
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--- Comment #14 from amker at gcc dot gnu.org ---
(In reply to Richard Biener from comment #13)
> The desired cleanup is to make POINTER_PLUS_EXPR take a signed offset
> argument,
> aka ssizetype instead of sizetype.
>
> Bin was working on this at some point, so was I ... Bin, can you paste the
> result (aka fallout) of your experiment(s)?
Yes, I tried this sometime ago, but never got a toolchain with regression tests
ICE free. POINTER_PLUS_EXPR are used/constructed in too many places, I need to
identify each case. As you pointed out, we basically treat sizetype offset as
ssizetype, in this point of view, there is no overflow/undefined issue, right?
Changing to ssizetype complicates code, for example, when we compute difference
(in bytes) of pointers, we need to convert offset to sizetype again.
One advantage for using ssizetype I can think about is in computing range
information related to pointers? In this case non-overflow behavior can be
used directly, rather than like pointer + sizetype_offset.
Note my original motivation is to better analyzing overflow-ness in scev, which
turned out not rely on pointer_plus_expr and fixed by independently.
>From gcc-bugs-return-563492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:43:42 2017
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Subject: [Bug middle-end/80743] ice in estimate_node_size_and_time, at ipa-inline-analysis.c:3385
Date: Mon, 15 May 2017 09:46:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Richard Biener from comment #2)
> Similar bug was mitigated recently.
Presumably you mean 80597, which was all about floating point rounding.
This bug looks different to me. The relevant lines of gcc source code are
bool nonconst = evaluate_predicate (&e->nonconst_predicate,
possible_truths);
bool exec = evaluate_predicate (&e->exec_predicate,
nonspec_possible_truths);
gcc_assert (!nonconst || exec);
>From gcc-bugs-return-563493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:46:24 2017
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Subject: [Bug rtl-optimization/80425] Extra inter-unit register move with zero-extension
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
> Looks like RA issue.
A related problem is shown with:
extern int a;
__m512i
f1 (__m512i x)
{
return _mm512_srai_epi32 (x, a);
}
compiled with -O2 -mavx512f:
movl a(%rip), %eax # 7 *zero_extendsidi2/4 [length = 6]
movq %rax, -56(%rbp) # 21 *movdi_internal/6 [length = 4]
vmovq -56(%rbp), %xmm1 # 22 *movdi_internal/15 [length
= 7]
vpsrad %xmm1, %zmm0, %zmm0 # 12 ashrv16si3/1 [length = 6]
Please note that GR->xmm moves are disabled by default. In this case, we could
extend from mem->xmm, but RA choose general register instead.
This happens even with the following patch that removes "?" from relevant
insns:
--cut here--
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index da79d8f..a1ff7c9 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -3762,10 +3762,10 @@
(define_insn "*zero_extendsidi2"
[(set (match_operand:DI 0 "nonimmediate_operand"
- "=r,?r,?o,r ,o,?*Ym,?!*y,?r ,?r,?*Yi,?*x,?*x,?*v,*r")
+ "=r,?r,?o,r ,o,?*Ym,?!*y,?r ,?r,?*Yi,*x,*x,*v,*r")
(zero_extend:DI
(match_operand:SI 1 "x86_64_zext_operand"
- "0 ,rm,r ,rmWz,0,r ,m ,*Yj,*x,r ,m , *x, *v,*k")))]
+ "0 ,rm,r ,rmWz,0,r ,m ,*Yj,*x,r ,m ,*x,*v,*k")))]
""
{
switch (get_attr_type (insn))
--cut here--
-m32 generates optimal code w and w/o patch:
vmovd a, %xmm1 # 7 *zero_extendsidi2/11 [length = 11]
vpsrad %xmm1, %zmm0, %zmm0 # 12 ashrv16si3/1 [length = 6]
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80475] Unevaluated combined delete new expression doesn't handle access error in class template SFINAE
Date: Mon, 15 May 2017 10:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80475
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
Version|7.0.1 |7.1.0
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed.
See also PR 79706 comment 3 with this added:
std::result_of<can_delete<false, A>(A*)> r;
>From gcc-bugs-return-563495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 09:49:43 2017
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Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 10:48:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 15 May 2017, amonakov at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
>
> --- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> Nowadays C has atomics and fences in the language standard, so it doesn't
> matter if x() had
>
> asm volatile("":::"memory");
>
> or
>
> __atomic_{signal,thread}_fence(__ATOMIC_ACQ_REL);
>
> or
>
> return __atomic_load_n(&b, __ATOMIC_SEQ_CST);
>
> In all three cases the compiler needs to place a memory barrier internally, and
> in the latter two it's impossible to argue that the source code is missing a
> clobber.
>
> I think it's correct that "memory" clobber cannot touch non-addressable auto
> vars, but extending that to static variables seems wrong. I'm not aware of any
> instance (apart from this bug) where gcc does that.
I think the IPA reference bug came across in another PR already, given
that IPA reference lacks references to unknown targets (it only records
direct decl references) I can't see how to easily fix this...
Well. With a flag obviously, but that must be already there somehow
given pointer dereferences are not recorded either.
>From gcc-bugs-return-563496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 10:33:09 2017
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Subject: [Bug middle-end/80743] ice in estimate_node_size_and_time, at ipa-inline-analysis.c:3385
Date: Mon, 15 May 2017 10:54:00 -0000
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--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Fault seems to be between revision 247334 and 247438.
Continuing bisection search.
>From gcc-bugs-return-563497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 10:48:51 2017
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80756] New: missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 11:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80756
Bug ID: 80756
Summary: missing diagnostic on non-constant expression with
function call such as fabs or fma in initializer
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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GCC misses a diagnostic when the fabs() or fma() function is used in an
initializer. For instance, consider:
----------------------------------------
double fabs (double);
double fma (double, double, double);
double foo (double, double, double);
double f (void)
{
static double x = fabs (3.0);
static double y = fma (2.0, 3.0, 4.0);
static double z = foo (2.0, 3.0, 4.0);
return x + y + z;
}
----------------------------------------
$ gcc-snapshot -std=c99 -c tst-cst.c
tst-cst.c: In function 'f':
tst-cst.c:9:21: error: initializer element is not constant
static double z = foo (2.0, 3.0, 4.0);
^~~
where gcc-snapshot is:
gcc version 8.0.0 20170512 (experimental) [trunk revision 247986] (Debian
20170512-1)
I get the diagnostic as expected for foo(), but not for fabs() and fma().
Note that <math.h> is not included, so that fabs() and fma() must not be
regarded as special. But even when these functions are regarded as ISO C's
specified ones, the diagnostic should probably still be present (it seems that
the C standard does not make an exception for such functions, unfortunately).
Same problem with GCC 6.3.0. But GCC 5.4.1 gives:
$ gcc-5 -std=c99 -c tst-cst.c
tst-cst.c: In function ‘f’:
tst-cst.c:7:21: warning: initializer element is not a constant expression
static double x = fabs (3.0);
^
tst-cst.c:8:21: warning: initializer element is not a constant expression
static double y = fma (2.0, 3.0, 4.0);
^
tst-cst.c:9:21: error: initializer element is not constant
static double z = foo (2.0, 3.0, 4.0);
^
As far as the C standard is concerned, there are no differences between
warnings and errors (all diagnostics), so that this is much better. But this
should really be an error in all cases.
As a comparison, Clang gives 3 "error" diagnostics (tested 3.6 to 4.0 RC1):
$ clang-4.0 -c tst-cst.c
tst-cst.c:7:21: error: initializer element is not a compile-time constant
static double x = fabs (3.0);
^~~~~~~~~~
tst-cst.c:8:21: error: initializer element is not a compile-time constant
static double y = fma (2.0, 3.0, 4.0);
^~~~~~~~~~~~~~~~~~~
tst-cst.c:9:21: error: initializer element is not a compile-time constant
static double z = foo (2.0, 3.0, 4.0);
^~~~~~~~~~~~~~~~~~~
3 errors generated.
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Subject: [Bug middle-end/80743] ice in estimate_node_size_and_time, at ipa-inline-analysis.c:3385
Date: Mon, 15 May 2017 11:12:00 -0000
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--- Comment #5 from David Binderman <dcb314 at hotmail dot com> ---
Further analysis shows fault is between revision 247412 and 247425
>From gcc-bugs-return-563499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 11:03:37 2017
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Subject: [Bug fortran/80757] New: Internal compiler error when omitting upper subscript of a character substring in a module subroutine
Date: Mon, 15 May 2017 11:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80757
Bug ID: 80757
Summary: Internal compiler error when omitting upper subscript
of a character substring in a module subroutine
Product: gcc
Version: 6.3.0
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Dear GNU Fortran Developers,
I found a bug in GNU Fortran. The following code (module + main program)
causes internal compiler error. Putting the problematic line from the
module subroutine into the main program (as char_array(2:4)(3:)= 'FO')
does not cause any compilation or runtime error.
Omitting the lower subscript like this: ch_array(2:4)(:2)= 'FO'
compiles and runs without error.
Omitting both subscripts like this: ch_array(2:4)(:)= 'FO'
compiles and runs without error.
The error exists with -std=f95, f2003 and f2008 switches as well.
I use GNU Fortran 6.3.0 under Debian 9.0.
I have an older GNU Fortran also, v4.4.5. which produces the same error.
Thank you for your efforts in advance,
Aron
THE SOURCE CODE THAT CAUSES THE BUG:
module modu
implicit none
contains
subroutine sub(ch_array)
character(len=*), intent(inout) :: ch_array(:)
! Putting here ----v `4' or `len(ch_array)', the code compiles.
ch_array(2:4)(3:)= 'FO'
endsubroutine sub
endmodule modu
program GF_compiler_error
use modu
implicit none
character(len=4) :: char_array(6)
integer :: j
char_array= 'abcd' ! vector operation
write(*,'(i1,a)') (j,'_'//char_array(j)//'_', j=1,SIZE(char_array))
write(*,*) ' '
call sub(char_array)
write(*,'(i1,a)') (j,'_'//char_array(j)//'_', j=1,SIZE(char_array))
endprogram GF_compiler_error
THE COMMAND LINE THAT TRIGGERS THE BUG:
gfortran -v -save-temps -std=f2008 -o out.bug ./character_array_bug.f90
THE COMPILER OUTPUT IS:
Driving: gfortran -v -save-temps -std=f2008 -o out.bug
./character_array_bug.f90 -l gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-16'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.3.0 20170425 (Debian 6.3.0-16)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=f2008' '-o' 'out.bug'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/f951 ./character_array_bug.f90 -quiet
-dumpbase character_array_bug.f90 -mtune=generic -march=x86-64 -auxbase
character_array_bug -std=f2008 -version -fintrinsic-modules-path
/usr/lib/gcc/x86_64-linux-gnu/6/finclude -o character_array_bug.s
GNU Fortran (Debian 6.3.0-16) version 6.3.0 20170425 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170425, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (Debian 6.3.0-16) version 6.3.0 20170425 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170425, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
./character_array_bug.f90:8:0:
ch_array(2:4)(3:)= 'FO'
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
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Subject: [Bug c/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
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--- Comment #1 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
The cause seems to be that the functions are builtins:
$ gcc-snapshot -std=c99 -c tst-cst.c
tst-cst.c: In function 'f':
tst-cst.c:7:21: error: initializer element is not constant
static double x = fabs (3.0);
^~~~
tst-cst.c:8:21: error: initializer element is not constant
static double y = fma (2.0, 3.0, 4.0);
^~~
tst-cst.c:9:21: error: initializer element is not constant
static double z = foo (2.0, 3.0, 4.0);
^~~
But I think that this is wrong. The use of -std=c99 shouldn't allow builtin
functions when they would give a different result (and even without -std=c99,
as this would be confusing). On this point, Clang has the same issue.
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----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #6 from David Binderman <dcb314 at hotmail dot com> ---
Revision 247417 by hubicka looks to be the problem.
Perhaps hubicka can offer us some advice ?
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Subject: [Bug c/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 11:49:00 -0000
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--- Comment #2 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Vincent Lefèvre from comment #1)
> The cause seems to be that the functions are builtins:
>
> $ gcc-snapshot -std=c99 -c tst-cst.c
[...]
Oops, incomplete copy-paste. It should have been:
$ gcc-snapshot -std=c99 -c tst-cst.c -fno-builtin
tst-cst.c: In function 'f':
tst-cst.c:7:21: error: initializer element is not constant
static double x = fabs (3.0);
^~~~
tst-cst.c:8:21: error: initializer element is not constant
static double y = fma (2.0, 3.0, 4.0);
^~~
tst-cst.c:9:21: error: initializer element is not constant
static double z = foo (2.0, 3.0, 4.0);
^~~
Without the -fno-builtin, the diagnostic for fabs() and fma() are missing.
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Subject: [Bug testsuite/80759] New: gcc.target/x86_64/abi/ms-sysv FAILs
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Bug ID: 80759
Summary: gcc.target/x86_64/abi/ms-sysv FAILs
Product: gcc
Version: 7.0
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Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
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CC: daniel.santos at pobox dot com
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Target: i?86-*-*
The new gcc.target/x86_64/abi/ms-sysv tests FAIL in various e.g. on
i386-pc-solaris2.*
and i686-pc-linux-gnu:
* In those 32-bit-default configurations, the 32-bit multilib is skipped as
unsupported as expected (although the UNSUPPORTED entry in gcc.sum occurs
e.g. 45 times for -j48 testing instead of only once), but for the 64-bit
multilib, I get
WARNING: Could not build
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c.
WARNING: Could not build
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c.
WARNING: Could not build
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c.
WARNING: Could not build
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c.
FAIL: gcc.target/x86_64/abi/ms-sysv CFLAGS="-O0 -g3" generator_args="-p0-5
--omit-rbp-clobbers"
FAIL: gcc.target/x86_64/abi/ms-sysv CFLAGS="-O2" generator_args="-p0-5"
FAIL: gcc.target/x86_64/abi/ms-sysv CFLAGS="-mcall-ms2sysv-xlogues -O0 -g3"
generator_args="-p0-5 --omit-rbp-clobbers"
FAIL: gcc.target/x86_64/abi/ms-sysv CFLAGS="-mcall-ms2sysv-xlogues -O2"
generator_args="-p0-5"
Looking at gcc.log, I find that both the generator (which seems ok) *and*
the testcases are compiled without the 64-bit multlib flag (-m64), leading
to a failing 32-bit compilation of the testcase:
spawn /var/gcc/regression/trunk/12-gcc/build/gcc/xgcc
-B/var/gcc/regression/trunk/12-gcc/build/gcc/
-I/var/gcc/regression/trunk/12-gcc/build/gcc/testsuite/gcc4/ms-sysv
-I/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv -O0
-g3 -Wall -c -o
/var/gcc/regression/trunk/12-gcc/build/gcc/testsuite/gcc4/ms-sysv/ms-sysv.o
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c^M
^[[01m^[[K/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c:62:3:^[[m^[[K
^[[01;31m^[[Kerror: ^[[m^[[K#error Test only valid on x86_64^M
# ^[[01;31m^[[Kerror^[[m^[[K Test only valid on x86_64^M
^[[01;31m^[[K^~~~~^[[m^[[K^M
^[[01m^[[K/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c:102:5:^[[m^[[K
^[[01;31m^[[Kerror: ^[[m^[[Kunknown type name '^[[01m^[[K__uint128_t^[[m^[[K'^M
^[[01;31m^[[K__uint128_t^[[m^[[K sseregs[10];^M
^[[01;31m^[[K^~~~~~~~~~~^[[m^[[K^M
^[[01m^[[K/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c:234:34:^[[m^[[K
^[[01;31m^[[Kerror: ^[[m^[[Kunknown type name '^[[01m^[[K__uint128_t^[[m^[[K'^M
static int compare_reg128 (const ^[[01;31m^[[K__uint128_t^[[m^[[K *a, const
__uint128_t *b,^M
^[[01;31m^[[K^~~~~~~~~~~^[[m^[[K^M
^[[01m^[[K/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c:234:56:^[[m^[[K
^[[01;31m^[[Kerror: ^[[m^[[Kunknown type name '^[[01m^[[K__uint128_t^[[m^[[K'^M
static int compare_reg128 (const __uint128_t *a, const
^[[01;31m^[[K__uint128_t^[[m^[[K *b,^M
^[[01;31m^[[K^~~~~~~~~~~^[[m^[[K^M
WARNING: Could not build
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/ms-sysv.c.
Apart from lacking the -m64 flag here, the compiler invocations have lost
-fno-diagnostics-show-caret -fdiagnostics-color=never, leading to unreadable
log output.
* do-test.S only works with gas: if I try to compile it manually with Solaris
/bin/as -m64, I get
Assembler:
"/var/tmp//cce6X86d.s", line 339 : Illegal mnemonic
Near line: " .struct 0"
"/var/tmp//cce6X86d.s", line 339 : Syntax error
Near line: " .struct 0"
"/var/tmp//cce6X86d.s", line 341 : Illegal mnemonic
Near line: " .struct test_data_save + 224"
"/var/tmp//cce6X86d.s", line 341 : Syntax error
Near line: " .struct test_data_save + 224"
"/var/tmp//cce6X86d.s", line 343 : Illegal mnemonic
Near line: " .struct test_data_save + 448"
"/var/tmp//cce6X86d.s", line 343 : Syntax error
Near line: " .struct test_data_save + 448"
"/var/tmp//cce6X86d.s", line 345 : Illegal mnemonic
Near line: " .struct test_data_save + 672"
"/var/tmp//cce6X86d.s", line 345 : Syntax error
Near line: " .struct test_data_save + 672"
"/var/tmp//cce6X86d.s", line 347 : Illegal mnemonic
Near line: " .struct test_data_save + 680"
"/var/tmp//cce6X86d.s", line 347 : Syntax error
Near line: " .struct test_data_save + 680"
i.e. as doesn't understand the gas .struct extension.
It seems to me that ms-sysv.exp is seriously misguided in trying to do all
its compilations manually instead of using
dg-test/dg-runtest/gcc_target_compile
which whould nicely avoid all those issues.
Rainer
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Subject: [Bug tree-optimization/80758] New: isnan/isfinite/isinf value propagation
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Bug ID: 80758
Summary: isnan/isfinite/isinf value propagation
Product: gcc
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Consider the following code:
#define isnan(x) __builtin_isnan(x)
#define isfinite(x) __builtin_isfinite(x)
int f(double a, double b)
{
if (!isfinite(a) || !isfinite(b))
return 0;
double c = a + b;
return isnan(c) ? 0 : 1;
}
For x86-64 with the current trunk version (and probably all previous versions)
the generated code looks something like this:
.cfi_startproc
vmovq .LC0(%rip), %xmm2
vmovapd %xmm0, %xmm4
vmovsd .LC1(%rip), %xmm3
xorl %eax, %eax
vandpd %xmm2, %xmm4, %xmm4
vucomisd %xmm4, %xmm3
jb .L5
vandpd %xmm1, %xmm2, %xmm2
vucomisd %xmm2, %xmm3
jb .L5
vaddsd %xmm1, %xmm0, %xmm0
xorl %eax, %eax
vucomisd %xmm0, %xmm0
setnp %al
.L5:
ret
.cfi_endproc
The issue here is that the sum of two finite values will never be NaN. It can
be ±Inf but not NaN. The VRP information should contain necessary information
and use it in the __builtin_isnan code generation.
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
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Subject: [Bug tree-optimization/80758] isnan/isfinite/isinf value propagation
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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. Long on (my) TODO list. Simplest version would propagate
fpclassify () bits plus signbit (). Special values might be interesting as
well ("not zero",
one, minus one, integer).
General value-range propagation might be doable but is more work.
SSA info needs to be enhanced to record FP stuff.
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Subject: [Bug target/80732] target_clones does not work with dlsym
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Last reconfirmed| |2017-5-15
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Known to fail| |6.3.0, 7.1.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I'll take a look.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
Date: Mon, 15 May 2017 12:29:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, Richi's reply to the patch:
```
I think the C FE and/or ASAN should be fixed instead. Seems to work
fine with C++.
```
In C it looks as follows:
{
switch (a)
{
{
int c;
case 2:;
(int *) &<<< Unknown tree: compound_literal_expr
int D.2118[0] = {}; >>>;
int c;
}
}
}
while in C++:
{
{
switch (a)
{
{
int c;
case 2:;
<<cleanup_point <<< Unknown tree: expr_stmt
(void) TARGET_EXPR <D.2598, {}> >>>>>;
int c;
}
}
}
}
Marek, can you please take a look why the VAR_DECL built from the expr_stmt is
not assigned in a BIND_EXPR?
>From gcc-bugs-return-563510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 12:25:52 2017
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Subject: [Bug target/80742] attribute target no- does not work
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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> ---
Even setting -mno-sse2 does not cause error. However this works as expected:
$ cat ~/Programming/testcases/pr80742.c && ./xgcc -B.
~/Programming/testcases/pr80742.c
typedef float __m128 __attribute__ ((vector_size (16)));
__attribute__((target("no-sse"))) __m128 func (__m128 x, __m128 y)
{
__m128 xmm0 = x, xmm1 = y, xmm2;
xmm0 = __builtin_ia32_xorps (xmm1, xmm1);
return xmm0;
}
/home/marxin/Programming/testcases/pr80742.c: In function ‘func’:
/home/marxin/Programming/testcases/pr80742.c:5:1: error: SSE register return
with SSE disabled
{
^
Negative meaning of option is definitely supported. That said, may I close the
PR?
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Subject: [Bug middle-end/80743] [8 Regression] ICE in estimate_node_size_and_time, at ipa-inline-analysis.c:3385
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
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CC| |marxin at gcc dot gnu.org
Summary|ice in |[8 Regression] ICE in
|estimate_node_size_and_time |estimate_node_size_and_time
|, at |, at
|ipa-inline-analysis.c:3385 |ipa-inline-analysis.c:3385
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, caused by the revision mentioned in the last comment.
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Subject: [Bug c++/80746] [concepts] ICE evaluating constraints for concepts with dependent template parameters
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r226713.
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Subject: [Bug tree-optimization/80760] New: Suggested clarification of an error message
Date: Mon, 15 May 2017 12:38:00 -0000
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The message
"%<l1-cache-size%> parameter is not a power of two %d"
(from
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/tree-ssa-loop-prefetch.c?view=markup#l2038)
caused a bit of confusion during our translation into Swedish. We now realise
the %d will become the size which is not a power of two. But we still feel the
message is a bit strange, with the word "two" directly followed by a number.
Could I suggest a clarification. Perhaps
"%<l1-cache-size%> parameter is %d which is not a power of two"
or at least a colon to separate the size from the message proper
"%<l1-cache-size%> parameter is not a power of two: %d"
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Subject: [Bug c++/67147] [concepts] ICE on checking concept with default template arguments
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Tom Honermann from comment #2)
> The following bug looks likely to be related:
> - Bug 80746 - [concepts] ICE evaluating constraints for concepts with
> dependent template parameters
Started with the same revision.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80747] [6/7/8 Regression] gcc.dg/tree-ssa/tailrecursion-4.c fails with ICE when compiled with options "-fprofile-use -freorder-blocks-and-partition"
Date: Mon, 15 May 2017 12:45:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
CC| |marxin at gcc dot gnu.org,
| |segher at gcc dot gnu.org
Summary|gcc.dg/tree-ssa/tailrecursi |[6/7/8 Regression]
|on-4.c fails with ICE when |gcc.dg/tree-ssa/tailrecursi
|compiled with options |on-4.c fails with ICE when
|"-fprofile-use |compiled with options
|-freorder-blocks-and-partit |"-fprofile-use
|ion" |-freorder-blocks-and-partit
| |ion"
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r228318 and can be reproduced on x86_64-linux-gnu.
>From gcc-bugs-return-563516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 12:43:02 2017
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Subject: [Bug fortran/80752] [5/6/7/8 Regression] ICE with wrong type initialization
Date: Mon, 15 May 2017 12:49:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
CC| |burnus at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|ICE with wrong type |[5/6/7/8 Regression] ICE
|initialization |with wrong type
| |initialization
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r218068.
>From gcc-bugs-return-563517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 12:45:45 2017
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Subject: [Bug fortran/80757] Internal compiler error when omitting upper subscript of a character substring in a module subroutine
Date: Mon, 15 May 2017 13:03:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, all releases I have (4.5.0+) do ICE.
>From gcc-bugs-return-563518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 12:49:34 2017
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Subject: [Bug driver/31468] Calling gcc with empty output filename can remove crt0.o (crt1.o on linux)
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon May 15 12:48:35 2017
New Revision: 248060
URL: https://gcc.gnu.org/viewcvs?rev=248060&root=gcc&view=rev
Log:
Do not allow empty argument of -o option (PR driver/31468).
2017-05-15 Martin Liska <mliska@suse.cz>
PR driver/31468
* gcc.c (process_command): Do not allow empty argument of -o option.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gcc.c
>From gcc-bugs-return-563519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:03:10 2017
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Subject: [Bug libstdc++/80761] New: std::set<T,C,A>::insert_return_type uses wrong iterator type
Date: Mon, 15 May 2017 13:11:00 -0000
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Bug ID: 80761
Summary: std::set<T,C,A>::insert_return_type uses wrong
iterator type
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
#include <set>
int main()
{
auto [ins, pos, node] = std::set<int>::insert_return_type{};
static_assert( std::is_same_v<bool, decltype(ins)> );
static_assert( std::is_same_v<std::set<int>::iterator, decltype(pos)> );
static_assert( std::is_same_v<std::set<int>::node_type, decltype(node)> );
}
ins.cc: In function ‘int main()’:
ins.cc:7:3: error: static assertion failed
static_assert( std::is_same_v<std::set<int>::iterator, decltype(pos)> );
^~~~~~~~~~~~~
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Subject: [Bug translation/80760] Suggested clarification of an error message
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
Component|tree-optimization |translation
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 13:13:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
ipa-reference.c has:
/* Set of all interesting module statics. A bit is set for every module
static we are considering. This is added to the local info when asm
code is found that clobbers all memory. */
static bitmap all_module_statics;
but I don't see where the code implementing the last statement in the comment
is.
I only see how indirect calls are handled (and I think barriers due to atomics
and asms can be handled in a similar fashion).
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Subject: [Bug libstdc++/80761] std::set<T,C,A>::insert_return_type uses wrong iterator type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 13:19:00 -0000
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 15 May 2017, amonakov at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
>
> --- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> ipa-reference.c has:
>
> /* Set of all interesting module statics. A bit is set for every module
> static we are considering. This is added to the local info when asm
> code is found that clobbers all memory. */
> static bitmap all_module_statics;
>
>
> but I don't see where the code implementing the last statement in the comment
> is.
> I only see how indirect calls are handled (and I think barriers due to atomics
> and asms can be handled in a similar fashion).
Yeah, the comment refers to the old implementation (which likely was
fine). The new implementation simply uses the ipa_ref lists instead
of walking stmts.
>From gcc-bugs-return-563524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:18:13 2017
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Subject: [Bug libstdc++/80761] std::set<T,C,A>::insert_return_type uses wrong iterator type
Date: Mon, 15 May 2017 13:26:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(and the order of the structure members is also wrong)
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Subject: [Bug c/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 13:28:00 -0000
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nsz at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |nsz at gcc dot gnu.org
--- Comment #3 from nsz at gcc dot gnu.org ---
fabs and fma identifiers are reserved for the implementation and it is valid to
treat them as constant expression in initializers based on c99 6.6p10
i think the gcc behaviour is reasonable.
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80730] bogus initializer element is not computable at load time converting a string to bool
Date: Mon, 15 May 2017 13:37:00 -0000
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--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sat, 13 May 2017, msebor at gcc dot gnu.org wrote:
> I don't see what purpose rejecting
>
> bool b = "";
>
> serves when
>
> bool b = !!"";
>
> or even
>
> bool b = "" ? 1 : 0;
>
> are accepted.
My comment is specifically about what's valid in the standard. I don't
think any of those should be considered valid standard C. What's accepted
beyond that, based on folding to a constant, is a separate matter (various
things that aren't constant expressions are accepted in various contexts
with pedwarns-if-pedantic because of existing code that makes use of
them).
>From gcc-bugs-return-563528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:37:33 2017
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Subject: [Bug c/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 13:42:00 -0000
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--- Comment #4 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to nsz from comment #3)
> fabs and fma identifiers are reserved for the implementation and it is valid
> to treat them as constant expression in initializers based on c99 6.6p10
Well, if <math.h> is included, perhaps, but this would need to be documented as
an implementation-defined behavior. The GCC manual Section 4 "C
Implementation-Defined Behavior" doesn't seem to document such constant
expressions and when they are available.
If <math.h> is not included, there should be at least a warning because fabs()
or fma() is used without including the header first, thus potentially yielding
unexpected results and obscure bugs.
>From gcc-bugs-return-563527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:28:21 2017
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Subject: [Bug driver/31468] Calling gcc with empty output filename can remove crt0.o (crt1.o on linux)
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Known to fail| |5.4.0, 6.3.0, 7.1.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug ipa/79850] diagnostics: typo in "fields has different layout"
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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> ---
Confirmed, I'll prepare a patch for that.
>From gcc-bugs-return-563530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:42:49 2017
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Subject: [Bug ipa/79849] diagnostics: typo in "type %qT itself violate the C++ One Definition Rule"
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I'll prepare a patch for that.
>From gcc-bugs-return-563531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:44:25 2017
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Subject: [Bug c/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 13:49:00 -0000
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Mon, 15 May 2017, vincent-gcc at vinc17 dot net wrote:
> GCC misses a diagnostic when the fabs() or fma() function is used in an
> initializer. For instance, consider:
There are pedwarns-if-pedantic for these cases.
> Note that <math.h> is not included, so that fabs() and fma() must not be
> regarded as special. But even when these functions are regarded as ISO C's
> specified ones, the diagnostic should probably still be present (it seems that
> the C standard does not make an exception for such functions, unfortunately).
The reservations with external linkage in C99/C11 7.1.3#1 are not
conditional on whether the corresponding header is included. (Only C90
Amendment 1 had such reservations conditional on inclusion of the
corresponding header, for the new functions it added, and that condition
would only be relevant with -std=iso9899:199409.)
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80735] IPA: SRA inhibits constant propagation of structs across multiple function calls
Date: Mon, 15 May 2017 13:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80735
Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
CC| |jamborm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Confirmed and probably not easily fixable in the current IPA-SRA
framework. IPA SRA changes the IRA in a way that would require jump
functions from aggregate to scalar arguments to work, and we don't
have those.
I would hate to raise overly optimistic expectation but I am working
on a rewrite of IPA-SRA that will make it a real IPA stage and that
should allow it and IPA-CP not to step on each other's toes, with a
little bit of effort.
Thanks for proving the example, it will be useful.
>From gcc-bugs-return-563533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 13:49:10 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/80756] missing diagnostic on non-constant expression with function call such as fabs or fma in initializer
Date: Mon, 15 May 2017 14:00:00 -0000
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Mon, 15 May 2017, nsz at gcc dot gnu.org wrote:
> fabs and fma identifiers are reserved for the implementation and it is valid to
> treat them as constant expression in initializers based on c99 6.6p10
The calls violate the requirement for constant expressions not to contain
function calls, hence the pedwarns-if-pedantic being necessary for this
code.
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Subject: [Bug libstdc++/80761] std::set<T,C,A>::insert_return_type uses wrong iterator type
Date: Mon, 15 May 2017 14:02:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon May 15 13:47:40 2017
New Revision: 248062
URL: https://gcc.gnu.org/viewcvs?rev=248062&root=gcc&view=rev
Log:
Fix order and types of members in C++17 insert_return_type structs
PR libstdc++/80761
* include/bits/node_handle.h (_Node_insert_return): Reorder members.
(tuple_size, tuple_element): Remove partial specializations.
* include/bits/stl_tree.h (_Rb_tree::insert_return_type): Use
const_iterator for std::set.
* testsuite/23_containers/map/modifiers/extract.cc: New.
* testsuite/23_containers/set/modifiers/extract.cc: New.
* testsuite/23_containers/unordered_map/modifiers/extract.cc: New.
* testsuite/23_containers/unordered_set/modifiers/extract.cc: New.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/node_handle.h
trunk/libstdc++-v3/include/bits/stl_tree.h
trunk/libstdc++-v3/testsuite/23_containers/map/modifiers/extract.cc
trunk/libstdc++-v3/testsuite/23_containers/set/modifiers/extract.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/extract.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/extract.cc
>From gcc-bugs-return-563535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:00:55 2017
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Subject: [Bug rtl-optimization/80754] invalid smull instructions generated after r247881
Date: Mon, 15 May 2017 14:02:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rearnsha at gcc dot gnu.org
Component|target |rtl-optimization
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I suspect this has just revealed a latent issue.
How can it be right for the register allocator to assign the same register to
*two* different output operands?
>From gcc-bugs-return-563536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:02:17 2017
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Subject: [Bug libstdc++/80761] std::set<T,C,A>::insert_return_type uses wrong iterator type
Date: Mon, 15 May 2017 14:22:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon May 15 14:01:38 2017
New Revision: 248063
URL: https://gcc.gnu.org/viewcvs?rev=248063&root=gcc&view=rev
Log:
Fix order and types of members in C++17 insert_return_type structs
PR libstdc++/80761
* include/bits/node_handle.h (_Node_insert_return): Reorder members.
(tuple_size, tuple_element): Remove partial specializations.
* include/bits/stl_tree.h (_Rb_tree::insert_return_type): Use
const_iterator for std::set.
* testsuite/23_containers/map/modifiers/extract.cc: New.
* testsuite/23_containers/set/modifiers/extract.cc: New.
* testsuite/23_containers/unordered_map/modifiers/extract.cc: New.
* testsuite/23_containers/unordered_set/modifiers/extract.cc: New.
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/bits/node_handle.h
branches/gcc-7-branch/libstdc++-v3/include/bits/stl_tree.h
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/map/modifiers/extract.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/set/modifiers/extract.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/extract.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/extract.cc
>From gcc-bugs-return-563537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:02:43 2017
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Subject: [Bug libstdc++/80761] std::set<T,C,A>::insert_return_type uses wrong iterator type
Date: Mon, 15 May 2017 14:27:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.2
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.2
>From gcc-bugs-return-563538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:22:45 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80762] New: is_constructible<filesystem::path, void> gives hard error with clang
Date: Mon, 15 May 2017 14:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80762
Bug ID: 80762
Summary: is_constructible<filesystem::path, void> gives hard
error with clang
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
#include <experimental/filesystem>
int main()
{
static_assert(
!std::is_constructible<std::experimental::filesystem::path, void>::value,
"");
}
This fails to compile with Clang:
In file included from fs.cc:1:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/filesystem:38:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_fwd.h:37:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/system_error:41:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/stdexcept:38:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/exception:171:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/nested_exception.h:40:
In file included from
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/move.h:57:
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:144:14:
error: ambiguous partial specializations of '__constructible_from<void, void>'
: public conditional<_B1::value, _B2, _B1>::type
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_path.h:124:17:
note: in instantiation of template class
'std::__and_<std::__not_<std::is_same<void,
std::experimental::filesystem::v1::__cxx11::path> >,
std::experimental::filesystem::v1::__cxx11::path::__constructible_from<void,
void> >' requested here
std::enable_if<__and_<__not_<is_same<_Tp1, path>>,
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_path.h:194:27:
note: in instantiation of template type alias '_Path' requested here
typename _Require = _Path<_Source>>
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_path.h:195:7:
note: in instantiation of default argument for 'path<void>' required here
path(_Source const& __source)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:970:28:
note: while substituting deduced template arguments into function template
'path'
[with _Source = void, _Require = (no value)]
= decltype(::new _Tp(declval<_Arg>()))>
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:971:24:
note: in instantiation of default argument for
'__test<std::experimental::filesystem::v1::__cxx11::path, void>' required
here
static true_type __test(int);
^~~~~~~~~~~
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:981:24:
note: (skipping 3 contexts in backtrace; use -ftemplate-backtrace-limit=0 to
see all)
typedef decltype(__test<_Tp, _Arg>(0)) type;
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:1068:14:
note: in instantiation of template class
'std::__is_direct_constructible_new_safe<std::experimental::filesystem::v1::__cxx11::path,
void>' requested here
: public conditional<is_reference<_Tp>::value,
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:1076:14:
note: in instantiation of template class
'std::__is_direct_constructible_new<std::experimental::filesystem::v1::__cxx11::path,
void>' requested here
: public __is_direct_constructible_new<_Tp, _Arg>::type
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:1116:14:
note: in instantiation of template class
'std::__is_direct_constructible<std::experimental::filesystem::v1::__cxx11::path,
void>' requested here
: public __is_direct_constructible<_Tp, _Arg>
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/type_traits:1127:14:
note: in instantiation of template class
'std::__is_constructible_impl<std::experimental::filesystem::v1::__cxx11::path,
void>' requested here
: public __is_constructible_impl<_Tp, _Args...>::type
^
fs.cc:6:13: note: in instantiation of template class
'std::is_constructible<std::experimental::filesystem::v1::__cxx11::path, void>'
requested here
!std::is_constructible<std::experimental::filesystem::path, void>::value,
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_path.h:113:14:
note: partial specialization matches [with _Iter = void]
struct __constructible_from<_Iter, _Iter>
^
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/experimental/bits/fs_path.h:118:14:
note: partial specialization matches [with _Source = void]
struct __constructible_from<_Source, void>
^
1 error generated.
>From gcc-bugs-return-563539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:27:11 2017
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Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
Date: Mon, 15 May 2017 14:46:00 -0000
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--- Comment #11 from Vittorio Zecca <zeccav at gmail dot com> ---
You still around, Steven?
I cannot say I missed you.
Nobody asked me to apply those fixes, I imagined that Tobias Burnus,
their author,
would try them and eventually apply them.
It seems that it did not happen.
Anyway, I just applied the patches to the trunk 8.0.0 level 247930 and
the ICE disappeared.
>From gcc-bugs-return-563540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:43:10 2017
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 14:59:00 -0000
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--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think a possible approach is to add a new cgraph_node flag (or a multi-bit
field, if we want to track presence of acquire/release/seq-cst compiler
barriers separately), handle asms and atomics specially in cgraphbuild.c to set
that flag, and finally use the new flag in ipa-reference.c?
>From gcc-bugs-return-563541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 14:46:06 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80763] New: -O3 causes error: inline clone in same comdat group list
Date: Mon, 15 May 2017 15:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80763
Bug ID: 80763
Summary: -O3 causes error: inline clone in same comdat group
list
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 41360
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41360&action=edit
gzipped C++ source code
The attached code does this with -O3
wavetable.cpp:622:1: error: inline clone in same comdat group list
_ZThn232_N12calf_plugins22wavetable_audio_module7processEjjjj.artificial_thunk.36/3381
(_ZThn232_N12calf_plugins22wavetable_audio_module7processEjjjj.artificial_thunk.36)
@0x7f866b098b80
Type: function definition analyzed
Visibility:
comdat_group:_ZN12calf_plugins12audio_moduleINS_18wavetable_metadataEE13process_sliceEjj
artificial
Same comdat group as:
_ZThn232_N12calf_plugins22wavetable_audio_module7processEjjjj.artificial_thunk.36/3301
next sharing asm name: 3301
References:
Referring:
Function
_ZThn232_N12calf_plugins22wavetable_audio_module7processEjjjj.artificial_thunk.36/3381
is inline copy in virtual uint32_t
calf_plugins::audio_module<calf_plugins::wavetable_metadata>::_ZThn232_N12calf_plugins12audio_moduleINS_18wavetable_metadataEE13process_sliceEjj(uint32_t,
uint32_t)/2956
Clone of
_ZThn232_N12calf_plugins22wavetable_audio_module7processEjjjj.artificial_thunk.36/3301
Availability: local
First run: 0
Function flags: local
Thunk fixed offset -232 virtual value 0 has virtual offset 0)
Called by:
_ZN12calf_plugins12audio_moduleINS_18wavetable_metadataEE13process_sliceEjj/3380
(speculative) (inlined) (3.90 per call) (can throw external)
Calls:
_ZN12calf_plugins22wavetable_audio_module7processEjjjj.constprop.35/3300 (3.90
per call)
wavetable.cpp:622:1: internal compiler error: verify_cgraph_node failed
0x9853ab cgraph_node::verify_node()
../../trunk/gcc/cgraph.c:3507
0x979724 symtab_node::verify()
../../trunk/gcc/symtab.c:1191
0x979724 symtab_node::verify_symtab_nodes()
../../trunk/gcc/symtab.c:1211
0x98daa3 symtab_node::checking_verify_symtab_nodes()
../../trunk/gcc/cgraph.h:613
The problem seems to exist between revisions 247438 and 247811.
I'll have a go at trying to reduce that range.
I'll also have a go at reducing the code.
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Subject: [Bug c++/80763] -O3 causes error: inline clone in same comdat group list
Date: Mon, 15 May 2017 15:22:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Here is the reduced code
struct b {
virtual ~b();
};
struct c {
virtual unsigned d(unsigned, unsigned);
virtual unsigned f(unsigned, unsigned, unsigned, unsigned) = 0;
};
template <class e> class i : e, c {
public:
float *g[e::h];
unsigned d(unsigned k, unsigned) {
bool j;
j ? f(k, k, 1, 1) : 0;
}
};
struct l : b {
enum { h };
};
class n : i<l> {
unsigned f(unsigned, unsigned, unsigned, unsigned) {
float *m = g[0];
float a[512];
m[0] = a[0];
}
virtual void o();
};
void n::o() {}
>From gcc-bugs-return-563543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:10:14 2017
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Subject: [Bug c++/80763] -O3 causes error: inline clone in same comdat group list
Date: Mon, 15 May 2017 15:25:00 -0000
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
>The problem seems to exist between revisions 247438 and 247811.
>I'll have a go at trying to reduce that range.
I'm wrong with my range of revisions. Problem now seems to exist sometime
before revision 236961.
I haven't got revisions from before that one. It will take some
time to generate them. I'll report back in the next day or two, unless
someone wants to volunteer to find the offending revision.
>From gcc-bugs-return-563544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:22:12 2017
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Subject: [Bug c/80764] New: ICE at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (internal compiler error: in verify_loop_structure, at cfgloop.c:1644)
Date: Mon, 15 May 2017 15:30:00 -0000
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Bug ID: 80764
Summary: ICE at -O3 in both 32-bit and 64-bit modes on
x86_64-linux-gnu (internal compiler error: in
verify_loop_structure, at cfgloop.c:1644)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170515 (experimental) [trunk revision 248042] (GCC)
$ gcc-trunk -O3 small.c
small.c: In function ‘fn1.part.0’:
small.c:12:1: error: size of loop 9 should be 6, not 7
}
^
small.c:12:1: error: loop 10’s latch does not have an edge to its header
small.c:12:1: internal compiler error: in verify_loop_structure, at
cfgloop.c:1644
0x7ba18a verify_loop_structure()
../../gcc-source-trunk/gcc/cfgloop.c:1644
0xb2ae3a execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1984
0xb2b855 execute_todo
../../gcc-source-trunk/gcc/passes.c:2022
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat small.c
int b, d, f, h;
char e;
int fn1();
int main() { return fn1(); }
int fn1(int p1) {
for (; d;)
for (; e < 3;) {
for (; h;)
b = fn1(0);
return f;
}
}
$
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80765] New: [8 Regression] 178.galgel in SPEC CPU 2000 fails to run
Date: Mon, 15 May 2017 15:32:00 -0000
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Bug ID: 80765
Summary: [8 Regression] 178.galgel in SPEC CPU 2000 fails to
run
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: tkoenig at gcc dot gnu.org
Target Milestone: ---
Target: i386
On Linux/i686, r247753 caused 178.galgel in SPEC CPU 2000 fails to run:
...
Solution by global spectral Galerkin method.
________________________________________________________________________________
Parameters:
Aspect ratio (length/height) = 4.0000000
Prandtl number = 0.15000000E-01
Number of basis functions in x-direction = 33
Number of basis functions in z-direction = 11
________________________________________________________________________________
Program received signal SIGSEGV, Segmentation fault.
0xf7ed2a02 in matmul_r8_avx2 (retarray=<optimized out>, a=<optimized out>,
b=<optimized out>, try_blas=<optimized out>, blas_limit=<optimized out>,
gemm=<optimized out>)
at ../../../../src-trunk/libgfortran/generated/matmul_r8.c:911
911 t1[l - ll + 1 + ((i - ii + 1) << 8) - 257] =
(gdb)
=> 0xf7ed2a02 <+2658>: vmovsd %xmm2,(%edi,%ecx,8)
(gdb) p $edi
$5 = 0
(gdb) p/x $ecx
$7 = 0x20000000
(gdb) p/x 0x20000000 * 8
$10 = 0x0
>From gcc-bugs-return-563546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:30:54 2017
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/80659] [7/8 Regression] -fsanitizedress evokes ICE in in gimplify_switch_expr
Date: Mon, 15 May 2017 15:37:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #6)
> Marek, can you please take a look why the VAR_DECL built from the expr_stmt
> is not assigned in a BIND_EXPR?
In C, non-static compound literals aren't pushed into any scope, so the
BIND_EXPR doesn't have that VAR_DECL. But instead of pushing such complits
into any scope we might just mark it as an artificial decl; I noticed
1647 if (!DECL_ARTIFICIAL (decl) && gimplify_ctxp->live_switch_vars)
1648 gimplify_ctxp->live_switch_vars->add (decl);
1649 }
so I think this should fix it:
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -5265,6 +5265,7 @@ build_compound_literal (location_t loc, tree type, tree
init, bool non_const)
TREE_READONLY (decl) = (TYPE_READONLY (type)
|| (TREE_CODE (type) == ARRAY_TYPE
&& TYPE_READONLY (TREE_TYPE (type))));
+ DECL_ARTIFICIAL (decl) = 1;
store_init_value (loc, decl, init, NULL_TREE);
if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
@@ -5297,7 +5298,6 @@ build_compound_literal (location_t loc, tree type, tree
init, bool non_const)
set_compound_literal_name (decl);
DECL_DEFER_OUTPUT (decl) = 1;
DECL_COMDAT (decl) = 1;
- DECL_ARTIFICIAL (decl) = 1;
DECL_IGNORED_P (decl) = 1;
pushdecl (decl);
rest_of_decl_compilation (decl, 1, 0);
>From gcc-bugs-return-563547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:32:52 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80728] IPA-reference suppresses compiler memory barrier
Date: Mon, 15 May 2017 15:46:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On May 15, 2017 4:43:04 PM GMT+02:00, "amonakov at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80728
>
>--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
>I think a possible approach is to add a new cgraph_node flag (or a
>multi-bit
>field, if we want to track presence of acquire/release/seq-cst compiler
>barriers separately), handle asms and atomics specially in
>cgraphbuild.c to set
>that flag, and finally use the new flag in ipa-reference.c?
Yes. Something like that. Let's see if Honza has any comments.
>From gcc-bugs-return-563549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:46:19 2017
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From: "vladimir.fuka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80766] New: [7 Regression] ICE with type bound procedures returning an array
Date: Mon, 15 May 2017 15:50:00 -0000
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Bug ID: 80766
Summary: [7 Regression] ICE with type bound procedures
returning an array
Product: gcc
Version: 7.1.1
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The following:
module m1
type :: base
contains
procedure :: fun
end type
type, extends(base) :: child
end type
contains
function fun(o) result(res)
real :: res(3)
class(base) :: o
res = 0
end function
end module
module m2
contains
subroutine sub(o)
use m1
class(child) :: o
real :: res(3)
res = o%fun()
end subroutine
end module
causes:
> gfortran-7 -cpp ice12.f90 -c
ice12.f90:30:0:
res = o%fun()
internal compiler error: in fold_convert_loc, at fold-const.c:2303
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.
in gfortran 7.1.1 (from the OpenSUSE GCC devel repository)
It does not ICE if the subroutine is external or in module m1. It does not ICE
if the base is used instead of child. It does not ICE if the function returns a
scalar.
>From gcc-bugs-return-563548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:37:44 2017
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Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
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--- Comment #12 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, May 15, 2017 at 02:27:04PM +0000, zeccav at gmail dot com wrote:
>
> --- Comment #11 from Vittorio Zecca <zeccav at gmail dot com> ---
> You still around, Steven?
> I cannot say I missed you.
I've never left, and you're more than welcomed to delete
all my patches from your copy of gfortran as you can
obviously to better.
% grep -i kargl gcc/fortran/ChangeLog-2011 | wc -l
15
% grep -i kargl gcc/fortran/ChangeLog-2012 | wc -l
3
% grep -i kargl gcc/fortran/ChangeLog-2013 | wc -l
3
% grep -i kargl gcc/fortran/ChangeLog-2015 | wc -l
62
% grep -i kargl gcc/fortran/ChangeLog-2016 | wc -l
53
% grep -i kargl gcc/fortran/ChangeLog | wc -l
1
% grep -i kargl libgfortran/ChangeLog-2013 | wc -l
1
% grep -i kargl libgfortran/ChangeLog-2014 | wc -l
2
% grep -i kargl libgfortran/ChangeLog-2015 | wc -l
2
% grep -i kargl libgfortran/ChangeLog-2016 | wc -l
1
% grep -i kargl libgfortran/ChangeLog | wc -l
1
I do find posts of the form
> Still in 7.1.0 and in trunk 8.0.0!
> Will it ever be fixed?
to be rather condescending. There is a dwindling number of
gfortran developers, and posts like yours is a contributing
reason.
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Subject: [Bug c/65430] Missing -Wsequence-point warning with COMPOUND_EXPRs
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This ought to fix both problems:
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -10443,6 +10443,7 @@ tree
c_process_expr_stmt (location_t loc, tree expr)
{
tree exprv;
+ tree orig_expr = expr;
if (!expr)
return NULL_TREE;
@@ -10450,7 +10451,7 @@ c_process_expr_stmt (location_t loc, tree expr)
expr = c_fully_fold (expr, false, NULL);
if (warn_sequence_point)
- verify_sequence_points (expr);
+ verify_sequence_points (orig_expr);
if (TREE_TYPE (expr) != error_mark_node
&& !COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (expr))
@@ -10462,7 +10463,7 @@ c_process_expr_stmt (location_t loc, tree expr)
out which is the result. */
if (!STATEMENT_LIST_STMT_EXPR (cur_stmt_list)
&& warn_unused_value)
- emit_side_effect_warnings (EXPR_LOC_OR_LOC (expr, loc), expr);
+ emit_side_effect_warnings (EXPR_LOC_OR_LOC (orig_expr, loc), orig_expr);
exprv = expr;
while (TREE_CODE (exprv) == COMPOUND_EXPR)
>From gcc-bugs-return-563550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:50:07 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++/80767] New: Eager instantiation of member template when not required
Date: Mon, 15 May 2017 15:53:00 -0000
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Bug ID: 80767
Summary: Eager instantiation of member template when not
required
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Here's a simplifed example of overloading taking from StackOverflow question
http://stackoverflow.com/q/43982799/2069064:
template <typename... Fs>
struct overloader : Fs...
{
overloader(Fs... fs)
: Fs(fs)...
{ }
using Fs::operator()...;
};
struct a { void foo() { } };
struct b { void bar() { } };
struct c { void bar() { } };
struct CallFoo {
auto operator()(a x) const { x.foo(); }
};
int main() {
overloader{
#ifdef BUG
[](a x) { x.foo(); },
#else
CallFoo{},
#endif
[](auto x) { x.bar(); }
}(a{});
}
If BUG is not defined, this compiles fine. But if BUG is defined (which just
swaps a lambda for an equivalent funject), the generic lambda's call operator
is instantiated (even though the non-generic lambda should be preferred) and
the program fails to compile with:
foo.cxx: In instantiation of ‘main()::<lambda(auto:1)> [with auto:1 = a]’:
foo.cxx:26:18: required by substitution of ‘template<class auto:1> constexpr
main()::<lambda(auto:1)>::operator decltype (((const
main()::<lambda(auto:1)>*)((const main()::<lambda(auto:1)>*
const)0))->operator()(static_cast<auto:1&&>(<anonymous>))) (*)(auto:1)() const
[with auto:1 = a]’
foo.cxx:27:10: required from here
foo.cxx:26:24: error: ‘struct a’ has no member named ‘bar’
[](auto x) { x.bar(); }
~~^~~
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Subject: [Bug c++/80763] -O3 causes error: inline clone in same comdat group list
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Problem now seems to be between revision 236947 and 236961.
Continuing the search.
>From gcc-bugs-return-563553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 15:53:44 2017
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Subject: [Bug c/65430] Missing -Wsequence-point warning with COMPOUND_EXPRs
Date: Mon, 15 May 2017 16:04:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Well, that's not quite right because of e.g. unevaluated || operand.
>From gcc-bugs-return-563554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:02:11 2017
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Subject: [Bug libstdc++/80762] is_constructible<filesystem::path, void> gives hard error with clang
Date: Mon, 15 May 2017 16:29:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-15
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And this fails even with GCC:
#include <experimental/filesystem>
int main()
{
using std::experimental::filesystem::path;
static_assert( !std::is_constructible<path, volatile path>::value, "");
}
>From gcc-bugs-return-563555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:04:39 2017
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Subject: [Bug c++/80737] variant<any> as class member resulting to compile errors
Date: Mon, 15 May 2017 16:36:00 -0000
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--- Comment #5 from TC <rs2740 at gmail dot com> ---
(In reply to Tim Shen from comment #3)
> (In reply to TC from comment #1)
> > Looks like the constraint on the convert-everything constructor needs to
> > check for is_same<decay_t<_Tp>, variant> first and short circuit if that's
> > true.
>
> I'm not quite sure whether we need that short circuit - it's in a SFINAE
> environment, so if anything goes wrong, there shouldn't be a hard error.
> Therefore even if I agree that we should check is_same<decay_t<_Tp>,
> variant> first, that shouldn't affect the correctness.
I'm not sure I agree. As http://stackoverflow.com/a/43963065/2756719 points
out, when you attempt to copy a variant<any>, as part of overload resolution
the code attempts to check if you can convert a variant<any> to any; that in
turn queries whether variant<any> is copy constructible, and we are very close
to turtling all the way down.
It does seem like there might be a frontend problem here, though.
>From gcc-bugs-return-563556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:29:38 2017
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Subject: [Bug fortran/80766] [7/8 Regression] ICE with type bound procedures returning an array
Date: Mon, 15 May 2017 16:39:00 -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| |6.3.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-05-15
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
Summary|[7 Regression] ICE with |[7/8 Regression] ICE with
|type bound procedures |type bound procedures
|returning an array |returning an array
Target Milestone|--- |7.2
Known to fail| |7.1.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed, likely r241403 (pr69566).
>From gcc-bugs-return-563557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:36:00 2017
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Subject: [Bug c++/80605] [7/8 Regression] Bad is_standard_layout result with empty base classes
Date: Mon, 15 May 2017 16:41:00 -0000
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--- Comment #8 from Ed Catmur <ed at catmur dot co.uk> ---
Looks to have been fixed by r247816.
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Subject: [Bug c/80730] bogus initializer element is not computable at load time converting a string to bool
Date: Mon, 15 May 2017 16:51:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I"m not sure I understand what you're saying. Your comment that "the
initializer *as
converted* must be a constant expression (and, thus, to be an address
constant, must be of pointer type)" makes it sound as an argument for rejecting
'_Bool b = "";' which would mean that you think '_Bool b = a;' should be
rejected as well. But your other comment that you'd "consider it appropriate
to handle implicit conversions in initializers exactly the same as casts are
handled" sounds as though you think '_Bool b = "";' should be accepted (because
'_Bool b = (_Bool)"";' is accepted). So I'm not sure what to make of it.
The point I am trying to make is that the GCC behavior, besides being
inconsistent, is not friendly or useful, no mater how one interprets the intent
of the standard. Taking the three cases:
_Bool b0 = ""; // rejected by GCC with an error
_Bool b1 = !""; // accepted by GCC without a warning
const char a[] = "";
_Bool b2 = a; // accepted with -Waddress
in each the initializer is the result of converting an address constant to
_Bool.
IBM XLC and Oracle c99 warn on the first and third and reject the second with
an error. That's just as unhelpful as what GCC does.
Clang, ICC, and even Visual C, accept all three (Clang issues
-Wpointer-bool-conversion for the third, the other two are silent). That's
much better.
The most useful behavior is to accept all three with a pedantic warning. It
makes it easy to port code to GCC that was written to one of these compilers,
while also making it possible to find out about portability problems when
porting to other compilers. Do you agree with this as a goal to work toward?
>From gcc-bugs-return-563559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:41:26 2017
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Subject: [Bug c++/80763] -O3 causes error: inline clone in same comdat group list
Date: Mon, 15 May 2017 16:57:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Problem seems to be between revision 236957 and 236961,
but I can't pin it down further. svn info tells me I
am at revision 236961, but the last revision was 236947 ??
Jason seems to have been doing something to templates
somewhere near there. Maybe they can offer further advice or
at very least eliminate themselves from the list of suspects.
>From gcc-bugs-return-563560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:51:21 2017
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Subject: [Bug fortran/80768] New: NULL pointer dereferenced in gfc_check_num_images at fortran/check.c
Date: Mon, 15 May 2017 17:15:00 -0000
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Bug ID: 80768
Summary: NULL pointer dereferenced in gfc_check_num_images at
fortran/check.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: zeccav at gmail dot com
Target Milestone: ---
! NULL pointer dereferenced in gfc_check_num_images at fortran/check.c:5150
! gfortran 8.0.0 trunk 247930
! Target: x86_64-pc-linux-gnu
! must be compiled with option -fcoarray=single
! check.c:5150 if (!gfc_notify_std (GFC_STD_F2008_TS, "FAILED= argument to
NUM_IMAGES at %L", &distance->where))
! pointer "distance" is NULL
! double checked with "gcc_assert(distance);" that fails producing the ICE
!
k5 = num_images(failed=.false.)
end
!f951: internal compiler error: in gfc_check_num_images, at
fortran/check.c:5150
!0x5f84c0 gfc_check_num_images(gfc_expr*, gfc_expr*)
! ../../gcc/fortran/check.c:5150
!0x6e69d8 do_check
! ../../gcc/fortran/intrinsic.c:263
!0x6ee74a check_specific
! ../../gcc/fortran/intrinsic.c:4525
!0x6fab7b gfc_intrinsic_func_interface(gfc_expr*, int)
! ../../gcc/fortran/intrinsic.c:4761
!0x85b8ab resolve_unknown_f
! ../../gcc/fortran/resolve.c:2723
!0x8a08a0 resolve_function
! ../../gcc/fortran/resolve.c:3025
!0x898ca6 gfc_resolve_expr(gfc_expr*)
! ../../gcc/fortran/resolve.c:6505
!0x8db4ed gfc_resolve_code(gfc_code*, gfc_namespace*)
! ../../gcc/fortran/resolve.c:10848
!0x8e3073 resolve_codes
! ../../gcc/fortran/resolve.c:16060
!0x881ecd gfc_resolve(gfc_namespace*)
! ../../gcc/fortran/resolve.c:16095
!0x812848 resolve_all_program_units
! ../../gcc/fortran/parse.c:6013
!0x829f80 gfc_parse_file()
! ../../gcc/fortran/parse.c:6260
!0x96f9a9 gfc_be_parse_file
! ../../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-563561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 16:57:43 2017
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
Date: Mon, 15 May 2017 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50392
--- Comment #13 from Vittorio Zecca <zeccav at gmail dot com> ---
Steve, you know why I do not like you.
If you are so sensitive please take care of the sensitivity of people
submitting bugs
and do not call them "idiot".
But this is not relevant here.
What is relevant is that I just ran "make check-fortran" and it was
almost clean,
except for another NULL pointer dereferencing at check.c with coarrays.
I just opened a new bug 80768.
For what regards me you are welcome to look into it and provide me with a
patch.
>From gcc-bugs-return-563562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 17:15:47 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
Date: Mon, 15 May 2017 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50392
--- Comment #14 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, May 15, 2017 at 04:57:37PM +0000, zeccav at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50392
>
> --- Comment #13 from Vittorio Zecca <zeccav at gmail dot com> ---
> Steve, you know why I do not like you.
Because I point out your flaws? Instead of your passive aggressive
comment:
>> Still in 7.1.0 and in trunk 8.0.0!
>> Will it ever be fixed?
Try something like
I was going through some old bug reports and found
PR 50392 still open. I tested the patch in comment #4,
and it appears to fix the problem. Could someone review
and commit the patch?
>From gcc-bugs-return-563563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 17:28:04 2017
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Subject: [Bug rtl-optimization/80747] [6/7/8 Regression] gcc.dg/tree-ssa/tailrecursion-4.c fails with ICE when compiled with options "-fprofile-use -freorder-blocks-and-partition"
Date: Mon, 15 May 2017 17:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80747
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Hi Zhangwen,
That patch looks correct. The explanation maybe not: the problem happens
if the earliest "end" is the entry block itself, not a real BB (that is,
if we start the function with a newly inserted jump). We could detect
just that, and/or we can add some extra asserts; or do as in your patch,
that looks fine to me as well.
A few minor comments for when you submit the patch:
-- It is spelled "default", not "defualt";
-- We don't use "yoda conditions" in GCC ("0 == x");
-- You shouldn't use 0 but instead use BB_UNPARTITIONED.
Thanks for finding the problem and making a patch!
>From gcc-bugs-return-563564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 17:43:11 2017
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Subject: [Bug fortran/80741] [Regression 7/8] incorrect behaviour of rewind with namelist
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80741
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-15
CC| |jvdelisle at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
Summary|incorrect behaviour of |[Regression 7/8] incorrect
|rewind with namelist |behaviour of rewind with
| |namelist
Ever confirmed|0 |1
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Confirmed and a regression
>From gcc-bugs-return-563565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 15 17:54:24 2017
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Date: Mon, 15 May 2017 17:57:00 -0000
From: Joseph Myers <joseph@codesourcery.com>
To: msebor at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
CC: <gcc-bugs@gcc.gnu.org>
Subject: Re: [Bug c/80730] bogus initializer element is not computable at load time converting a string to bool
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On Mon, 15 May 2017, msebor at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id€730
>
> --- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
> I"m not sure I understand what you're saying. Your comment that "the
> initializer *as
> converted* must be a constant expression (and, thus, to be an address
> constant, must be of pointer type)" makes it sound as an argument for rejecting
> '_Bool b = "";' which would mean that you think '_Bool b = a;' should be
> rejected as well. But your other comment that you'd "consider it appropriate
> to handle implicit conversions in initializers exactly the same as casts are
> handled" sounds as though you think '_Bool b = "";' should be accepted (because
> '_Bool b = (_Bool)"";' is accepted). So I'm not sure what to make of it.
I think both '_Bool b = "";' and '_Bool b = (_Bool)"";' should be handled
the same, regarding what's accepted with what options and what
diagnostics. I don't think the standard should be interpreted in a way
that handles them differently or that requires either of them to be
accepted. Actually accepting them is fairly harmless. (Those particular
cases don't involve anything *forbidden* in a constant expression, such as
a function call, so don't actually require a pedwarn-if-pedantic, although
I think such a diagnostic with -pedantic makes sense.)
> The most useful behavior is to accept all three with a pedantic warning. It
> makes it easy to port code to GCC that was written to one of these compilers,
> while also making it possible to find out about portability problems when
> porting to other compilers. Do you agree with this as a goal to work toward?
Yes.
--
Joseph S. Myers
joseph@codesourcery.com
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2017-05-03 2:42 ` [Bug translation/80280] Missing closing quote (%>) c/semantics.c and c/c-typeck.c msebor at gcc dot gnu.org
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